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        <title>Getting Started with SurrealDB 2 and Axum for Web Development</title>
        <published>2024-11-29T00:00:00+00:00</published>
        <updated>2024-11-29T00:00:00+00:00</updated>
        
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        <content type="html" xml:base="https://spacedimp.com/blog/using-rust-axum-surrealdb-to-build-a-webapp/">&lt;p&gt;&lt;img src=&quot;&#x2F;img&#x2F;gif&#x2F;surreal.gif&quot; alt=&quot;Alt text&quot; title=&quot;demo of Rust, Axum, SurrealDB&quot; &#x2F;&gt;&lt;&#x2F;p&gt;
&lt;p&gt;The goal of this blog post is to help beginners grasp the basics of using SurrealDB 2 and Axum for web development.&lt;&#x2F;p&gt;
&lt;blockquote&gt;
&lt;p&gt;I find the technology fascinating, but readers should be aware that SurrealDB v1 upset many users due to the lack of documentation and poor performance&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;p&gt;However, version 2 fixes several performance and bug issues. One such improvement is that the in-memory storage is now powered by SurrealKV, which is concurrent, meaning that read&#x2F;write operations scale with the number of CPUs.&lt;&#x2F;p&gt;
&lt;h2 id=&quot;understanding-surrealdb-s-architecture&quot;&gt;Understanding SurrealDB&#x27;s Architecture&lt;&#x2F;h2&gt;
&lt;p&gt;SurrealDB separates its query language (called &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealql&quot;&gt;SurrealQL&lt;&#x2F;a&gt;) from its data storage backend. This flexibility allows you to choose the best storage option for your project. While I&#x27;ll be using SurrealKV locally for simplicity, &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;surrealdb&#x2F;latest&#x2F;surrealdb&#x2F;engine&#x2F;any&#x2F;fn.connect.html#examples&quot;&gt;other options&lt;&#x2F;a&gt; are available, such as TikV for distributed storage or other in-memory solutions.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealql&quot;&gt;SurrealQL&lt;&#x2F;a&gt; from the data storage. I&#x27;ll be using SurrealKV locally but there are other options including TikV for distributed and in memory to name a &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;surrealdb&#x2F;latest&#x2F;surrealdb&#x2F;engine&#x2F;any&#x2F;fn.connect.html#examples&quot;&gt;few&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;p&gt;Check out the SurrealDB &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealdb&#x2F;introduction&#x2F;start&quot;&gt;getting started&lt;&#x2F;a&gt; page to start up an in memory data store. I would recommend clicking on &quot;Using CLI&quot; to learn how to connect to the database in the terminal.&lt;&#x2F;p&gt;
&lt;p&gt;I found the &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;learn&#x2F;book&quot;&gt;book&lt;&#x2F;a&gt; very helpful in learning the language.&lt;&#x2F;p&gt;
&lt;h2 id=&quot;prerequisites&quot;&gt;Prerequisites&lt;&#x2F;h2&gt;
&lt;p&gt;Before getting started, make sure you have the following installed:&lt;&#x2F;p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;www.rust-lang.org&#x2F;tools&#x2F;install&quot;&gt;Rust&lt;&#x2F;a&gt; installed&lt;&#x2F;p&gt;
&lt;&#x2F;li&gt;
&lt;li&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;github.com&#x2F;surrealdb&#x2F;surrealdb?tab=readme-ov-file#installation&quot;&gt;SurrealDB&lt;&#x2F;a&gt; installed&lt;&#x2F;p&gt;
&lt;&#x2F;li&gt;
&lt;&#x2F;ul&gt;
&lt;h2 id=&quot;step-1-create-the-project&quot;&gt;Step 1. Create the Project&lt;&#x2F;h2&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; new webapp
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;add dependencies&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;cd&lt;&#x2F;span&gt;&lt;span&gt; webapp
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; add axum
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; add serde&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --features&lt;&#x2F;span&gt;&lt;span&gt; derive
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; add surrealdb&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --features&lt;&#x2F;span&gt;&lt;span&gt; kv-surrealkv
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; add thiserror
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; add tokio&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --features&lt;&#x2F;span&gt;&lt;span&gt; full
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; add serde_json
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;p&gt;Now start up a SurrealKV storage engine at localhost:8080&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;surreal&lt;&#x2F;span&gt;&lt;span&gt; start&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --user&lt;&#x2F;span&gt;&lt;span&gt; root&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --pass&lt;&#x2F;span&gt;&lt;span&gt; password&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bind&lt;&#x2F;span&gt;&lt;span&gt; 127.0.0.1:8080 surrealkv:&#x2F;&#x2F;mydb
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;In depth examples of using surreal start &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealdb&#x2F;cli&#x2F;start&quot;&gt;here&lt;&#x2F;a&gt;. Make sure to select V2.x&lt;&#x2F;p&gt;
&lt;p&gt;From a second terminal, connect to the engine and set the database to test_db and namespace to test_ns&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;surreal&lt;&#x2F;span&gt;&lt;span&gt; sql&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --endpoint&lt;&#x2F;span&gt;&lt;span&gt; http:&#x2F;&#x2F;127.0.0.1:8080&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --user&lt;&#x2F;span&gt;&lt;span&gt; root&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --pass&lt;&#x2F;span&gt;&lt;span&gt; password&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --ns&lt;&#x2F;span&gt;&lt;span&gt; test_ns&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --db&lt;&#x2F;span&gt;&lt;span&gt; test_db
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;In depth examples of using surreal sql &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealdb&#x2F;cli&#x2F;sql&quot;&gt;here&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;h2 id=&quot;step-2-insert-some-data-in-the-database&quot;&gt;Step 2. Insert some data in the database&lt;&#x2F;h2&gt;
&lt;p&gt;After the last surreal sql ... statement you should be connected:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;test_ns&#x2F;test_db&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;I will create a &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealql&#x2F;statements&#x2F;define&#x2F;table&quot;&gt;TABLE&lt;&#x2F;a&gt; called users and set the table to have structured, predictable data types with a &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;tutorials&#x2F;define-a-schema&quot;&gt;Schema&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span&gt;DEFINE TABLE IF NOT EXISTS users SCHEMAFULL;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Scrolling down in that last Schema link will show the user that at any point we can add a field to our table that is schemaless using FLELXIBLE. Perhaps for metatdata.&lt;&#x2F;p&gt;
&lt;p&gt;Let&#x27;s add a username &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealql&#x2F;statements&#x2F;define&#x2F;field&quot;&gt;FIELD&lt;&#x2F;a&gt; to the table that&#x27;s only allowed to be under 14 characters long&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span&gt;DEFINE FIELD username ON TABLE users TYPE string ASSERT string::len($value) &amp;lt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;14&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Next we can define an &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealql&#x2F;statements&#x2F;define&#x2F;indexes&quot;&gt;INDEX&lt;&#x2F;a&gt; for the username to make it a unique field.&lt;&#x2F;p&gt;
&lt;p&gt;Reading through the docs tells us that indexes are used to speed up query execution times dramatically.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span&gt;DEFINE INDEX usernameIndex ON TABLE users COLUMNS username UNIQUE;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now let&#x27;s &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealql&#x2F;statements&#x2F;create&quot;&gt;CREATE&lt;&#x2F;a&gt; a user&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span&gt;CREATE users &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;SET&lt;&#x2F;span&gt;&lt;span&gt; username = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;User1&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;and we can see from the output that SurrealDB automatically gives us an id field&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;[[{&lt;&#x2F;span&gt;&lt;span&gt; id: users:2272f7xnqi502d9it9q4, username: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;User1&amp;#39; &lt;&#x2F;span&gt;&lt;span&gt;}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;]]
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;we could have also created the unique id with this command (skip, just for example):&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span&gt;CREATE users:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;1 &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;SET&lt;&#x2F;span&gt;&lt;span&gt; username = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;User1&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;h2 id=&quot;step-3-write-some-rust-code&quot;&gt;Step 3. Write some Rust code&lt;&#x2F;h2&gt;
&lt;p&gt;Open src&#x2F;main.rs and grab all the dependencies we added&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::{extract::State, routing::get, Router, Json, extract::Path, response::IntoResponse };
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;surrealdb::Surreal;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;serde::{Deserialize, Serialize};
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::sync::Arc;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;tokio::sync::Mutex;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;surrealdb::engine::any::Any;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We should pause here and take a look at the official SurrealDB example of using the &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;sdk&#x2F;rust&#x2F;frameworks&#x2F;axum&quot;&gt;Rust SDK&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;p&gt;Ok so it says we should convert Surreal errors into Axum responses (copy paste the boilerplate)&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mod &lt;&#x2F;span&gt;&lt;span&gt;error {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::http::StatusCode;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::response::IntoResponse;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::response::Response;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::Json;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;thiserror::Error;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    #[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Error, Debug)]
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub enum &lt;&#x2F;span&gt;&lt;span&gt;Error {
&lt;&#x2F;span&gt;&lt;span&gt;        #[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;error&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;database error&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)]
&lt;&#x2F;span&gt;&lt;span&gt;        Db,
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;impl &lt;&#x2F;span&gt;&lt;span&gt;IntoResponse &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for &lt;&#x2F;span&gt;&lt;span&gt;Error {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;self&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; Response {
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;self &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;            Error::Db=&amp;gt; (StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;INTERNAL_SERVER_ERROR&lt;&#x2F;span&gt;&lt;span&gt;, Json(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;An error has occurred. Please try again later.&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;())).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;            }
&lt;&#x2F;span&gt;&lt;span&gt;        }
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;impl &lt;&#x2F;span&gt;&lt;span&gt;From&amp;lt;surrealdb::Error&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for &lt;&#x2F;span&gt;&lt;span&gt;Error {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;from&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;error&lt;&#x2F;span&gt;&lt;span&gt;: surrealdb::Error) -&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;Self &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;            eprintln!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{error}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;Self&lt;&#x2F;span&gt;&lt;span&gt;::Db
&lt;&#x2F;span&gt;&lt;span&gt;        }
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Alright with the boilerplate out of the way I want to discuss &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;blog&#x2F;introducing-surrealany-dynamic-support-for-any-engine-in-rust&quot;&gt;surrealdb::engine::any&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;p&gt;I mentioned that I would be using SurrealKV as the database engine, but really SurrealDB doesn&#x27;t force us to stick with one. The link right above explains how the query language is completely separate from the database engine.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; make sure our database is accessible from all routes
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Clone)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;AppState {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;db&lt;&#x2F;span&gt;&lt;span&gt;: Arc&amp;lt;Mutex&amp;lt;Surreal&amp;lt;Any&amp;gt;&amp;gt;&amp;gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() -&amp;gt; Result&amp;lt;(), error::Error&amp;gt;{
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; any allows us to swap between rocksdb:&#x2F;&#x2F;mydb, mem:&#x2F;&#x2F;, etc. 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; db = surrealdb::engine::any::connect(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;surrealkv:&#x2F;&#x2F;mydb&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; authenticate
&lt;&#x2F;span&gt;&lt;span&gt;db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;signin&lt;&#x2F;span&gt;&lt;span&gt;(surrealdb::opt::auth::Root {
&lt;&#x2F;span&gt;&lt;span&gt;    username: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;root&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;    password: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;password&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}).await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; select a namespace and a database inside that namespace
&lt;&#x2F;span&gt;&lt;span&gt;db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;use_ns&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;test_ns&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;use_db&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;test_db&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; for routes to access the database, Axum provides AppState
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app_state = AppState {
&lt;&#x2F;span&gt;&lt;span&gt;    db: Arc::new(Mutex::new(db))
&lt;&#x2F;span&gt;&lt;span&gt;};
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; define our routes to create, delete, get users
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app = Router::new()
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(get_users))
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;create&#x2F;:uname&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(create_user))
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;delete&#x2F;:uname&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(delete_user))
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;with_state&lt;&#x2F;span&gt;&lt;span&gt;(app_state);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; listener = tokio::net::TcpListener::bind(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.0.0.0:3000&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).await.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;axum::serve(listener, app).await.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;Ok(())
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;For brevity I&#x27;ll just use get requests with the data directly in the path.&lt;&#x2F;p&gt;
&lt;p&gt;However, you can use RESTful APIs such as delete, post, etc. Then access the &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;surrealdb.com&#x2F;docs&#x2F;surrealdb&#x2F;integration&#x2F;http&quot;&gt;endpoints&lt;&#x2F;a&gt; with curl&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;curl -I&lt;&#x2F;span&gt;&lt;span&gt; http:&#x2F;&#x2F;localhost:8080&#x2F;status
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;HTTP&#x2F;1.1&lt;&#x2F;span&gt;&lt;span&gt; 200 OK
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;content-length:&lt;&#x2F;span&gt;&lt;span&gt; 0
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;vary:&lt;&#x2F;span&gt;&lt;span&gt; origin, access-control-request-method, access-control-request-headers
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;access-control-allow-origin: &lt;&#x2F;span&gt;&lt;span&gt;*
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;surreal-version:&lt;&#x2F;span&gt;&lt;span&gt; surrealdb-2.0.0+20240910.8f30ee08
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;server:&lt;&#x2F;span&gt;&lt;span&gt; SurrealDB
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;x-request-id:&lt;&#x2F;span&gt;&lt;span&gt; 3dedcc96-4d8a-451e-b60d-4eaac14fa3f8
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;date:&lt;&#x2F;span&gt;&lt;span&gt; Wed, 11 Sep 2024 00:52:49 GMT
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now we should write a database query to define our table if it doesn&#x27;t exist. Just like we did manually at the start of the tutorial.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;query&lt;&#x2F;span&gt;&lt;span&gt;(
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;DEFINE TABLE IF NOT EXISTS users SCHEMAFULL;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;    DEFINE FIELD IF NOT EXISTS username ON TABLE users TYPE string ASSERT string::len($value) &amp;lt; 14;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;    DEFINE INDEX IF NOT EXISTS usernameIndex ON TABLE users COLUMNS username UNIQUE;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;    &amp;quot;
&lt;&#x2F;span&gt;&lt;span&gt;).await?;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;And now we create the routes&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; schema to insert or get users 
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Serialize, Deserialize, Clone)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;User {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;username&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; retrieve all users 
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; 127.0.0.1:3000&#x2F;
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;get_users&lt;&#x2F;span&gt;&lt;span&gt;(State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;AppState&amp;gt;) -&amp;gt; Result&amp;lt;Json&amp;lt;Vec&amp;lt;User&amp;gt;&amp;gt;, error::Error&amp;gt;{
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; db = state.db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;lock&lt;&#x2F;span&gt;&lt;span&gt;().await;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; response = db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;query&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;SELECT * FROM users&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; result: Vec&amp;lt;User&amp;gt; = response.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;take&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;)?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    Ok(Json(result))
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now to create a user at localhost:3000&#x2F;create&#x2F;newusername&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;create_user&lt;&#x2F;span&gt;&lt;span&gt;(Path(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;uname&lt;&#x2F;span&gt;&lt;span&gt;): Path&amp;lt;String&amp;gt;, State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;AppState&amp;gt;) -&amp;gt; Result&amp;lt;impl IntoResponse, error::Error&amp;gt;{
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; db = state.db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;lock&lt;&#x2F;span&gt;&lt;span&gt;().await;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; newUser: Option&amp;lt;User&amp;gt; = db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;create&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;users&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;content&lt;&#x2F;span&gt;&lt;span&gt;(User {
&lt;&#x2F;span&gt;&lt;span&gt;        username: uname,
&lt;&#x2F;span&gt;&lt;span&gt;    }).await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    Ok(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Success creating new user&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;And we can delete a user at localhost:3000&#x2F;delete&#x2F;newusername&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;delete_user&lt;&#x2F;span&gt;&lt;span&gt;(Path(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;uname&lt;&#x2F;span&gt;&lt;span&gt;): Path&amp;lt;String&amp;gt;, State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;AppState&amp;gt;) -&amp;gt; Result&amp;lt;impl IntoResponse, error::Error&amp;gt;{
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; db = state.db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;lock&lt;&#x2F;span&gt;&lt;span&gt;().await;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    db.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;query&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;DELETE FROM users WHERE username = $username&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;bind&lt;&#x2F;span&gt;&lt;span&gt;((&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;username&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, uname)).await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    Ok(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Success deleting user&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;With this basic setup in place, you can start experimenting with more complex queries, adding authentication, or introducing new features to your app. The full code is available on &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;github.com&#x2F;spacedimp&#x2F;Rust-Axum-SurrealDB-example&#x2F;tree&#x2F;main&quot;&gt;Github&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;p&gt;Happy coding!&lt;&#x2F;p&gt;
</content>
        
    </entry>
    <entry xml:lang="en">
        <title>How to Properly Learn Rust Programming</title>
        <published>2023-08-06T00:00:00+00:00</published>
        <updated>2023-08-06T00:00:00+00:00</updated>
        
        <author>
          <name>
            
              Unknown
            
          </name>
        </author>
        
        <link rel="alternate" type="text/html" href="https://spacedimp.com/blog/how-to-properly-learn-rust/"/>
        <id>https://spacedimp.com/blog/how-to-properly-learn-rust/</id>
        
        <content type="html" xml:base="https://spacedimp.com/blog/how-to-properly-learn-rust/">&lt;p&gt;The goal, in this blog post, will be to help beginner Rust programmers overcome the notion that Rust is a difficult language.&lt;&#x2F;p&gt;
&lt;p&gt;First and foremost, I will advocate for the Rust book from Brown University over the regular one. Here: &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;rust-book.cs.brown.edu&#x2F;&quot;&gt;https:&#x2F;&#x2F;rust-book.cs.brown.edu&#x2F;&lt;&#x2F;a&gt; (it requires you to scroll all the way down and accept to participate).&lt;&#x2F;p&gt;
&lt;p&gt;It provides a more thorough explanation of Rust and includes simple quizzes to test your new gained knowledge. The original book does not contain quizzes and so many people believe they understand Rust but are completely mistaken.&lt;&#x2F;p&gt;
&lt;p&gt;Alongside with the book, you&#x27;ll want to test the examples using either a local programming environment or the online environment &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;play.rust-lang.org&#x2F;&quot;&gt;https:&#x2F;&#x2F;play.rust-lang.org&#x2F;&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;h3 id=&quot;how-to-set-up-a-local-workspace-skip-if-you-prefer-the-online-rust-playground&quot;&gt;How to set up a local workspace (skip if you prefer the online Rust Playground)&lt;&#x2F;h3&gt;
&lt;p&gt;I&#x27;m assuming Rust is already installed on your system.&lt;&#x2F;p&gt;
&lt;p&gt;Create a new directory&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mkdir&lt;&#x2F;span&gt;&lt;span&gt; project &amp;amp;&amp;amp; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;cd&lt;&#x2F;span&gt;&lt;span&gt; project
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Manually create a Cargo.toml for the workspace&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;vim&lt;&#x2F;span&gt;&lt;span&gt; Cargo.toml
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;pre data-lang=&quot;toml&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-toml &quot;&gt;&lt;code class=&quot;language-toml&quot; data-lang=&quot;toml&quot;&gt;&lt;span&gt;[workspace]
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;members &lt;&#x2F;span&gt;&lt;span&gt;= [
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;app&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;applib&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Initialize the binary directory and the library directory&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; init&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bin&lt;&#x2F;span&gt;&lt;span&gt; app &amp;amp;&amp;amp; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; init&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --lib&lt;&#x2F;span&gt;&lt;span&gt; applib
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Make applib available inside of app by editing &lt;code&gt;app&#x2F;Cargo.toml&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;toml&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-toml &quot;&gt;&lt;code class=&quot;language-toml&quot; data-lang=&quot;toml&quot;&gt;&lt;span&gt;[package]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;app&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.1.0&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;edition &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;2021&amp;quot;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;[dependencies]
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;#add this
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;applib &lt;&#x2F;span&gt;&lt;span&gt;= {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;path &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;..&#x2F;applib&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now applib&#x27;s functions can be imported into the app binary. Edit &lt;code&gt;app&#x2F;src&#x2F;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use&lt;&#x2F;span&gt;&lt;span&gt; applib;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; applib::add() is located in applib&#x2F;src&#x2F;lib.rs
&lt;&#x2F;span&gt;&lt;span&gt;   println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;100 + 100 = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, applib::add(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100&lt;&#x2F;span&gt;&lt;span&gt;)); 
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;and run it:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bin&lt;&#x2F;span&gt;&lt;span&gt; app
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# 200 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;h2 id=&quot;memory-safety&quot;&gt;Memory safety&lt;&#x2F;h2&gt;
&lt;p&gt;I believe Rust&#x27;s memory safe idiosyncrasies are what intimidate most people from this language. However, this is what makes it a safe language that doesn&#x27;t require a garbage collector. It&#x27;s essential to master this part of the language to write memory safe code.&lt;&#x2F;p&gt;
&lt;p&gt;The good news is that even if you write unsafe code it won&#x27;t compile.&lt;&#x2F;p&gt;
&lt;h3 id=&quot;ownership&quot;&gt;Ownership&lt;&#x2F;h3&gt;
&lt;p&gt;Since there exists no garbage collector, owned variables are destructed once they go out of scope. Essentially, once a function or &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;doc.rust-lang.org&#x2F;reference&#x2F;expressions&#x2F;block-expr.html&quot;&gt;block expression&lt;&#x2F;a&gt; returns. Unless the variable is returned or the variable was passed by borrowing (also known as pass by reference).&lt;&#x2F;p&gt;
&lt;p&gt;The following variable will be immutable for the entire duration of the program.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; num = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;14&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, num); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints 14
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;blockquote&gt;
&lt;p&gt;note: notice how num&#x27;s type is implicitly assigned; a const variable would require explicitly assigning the type as so:&lt;&#x2F;p&gt;
&lt;p&gt;const NUM: i32 = 10;&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;p&gt;In order to make it mutable we must add the keyword mut:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; num = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;14&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;    num = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, num); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints 100
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Suppose we pass this variable into a function&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;plusOne&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;num&lt;&#x2F;span&gt;&lt;span&gt;: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;i32&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, num + &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints 101
&lt;&#x2F;span&gt;&lt;span&gt;} 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; num = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;14&lt;&#x2F;span&gt;&lt;span&gt;; 
&lt;&#x2F;span&gt;&lt;span&gt;   plusOne(num);
&lt;&#x2F;span&gt;&lt;span&gt;   println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, num); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints 100
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Notice how the code was able to call println! on num after calling the function plusOne.&lt;&#x2F;p&gt;
&lt;p&gt;Normally Rust would not compile this program because any variable passed into a function (without an ampersand &amp;amp;) would destroy the variable.&lt;&#x2F;p&gt;
&lt;p&gt;However, Rust primitives such as u64 implement the &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;doc.rust-lang.org&#x2F;std&#x2F;marker&#x2F;trait.Copy.html#implementors&quot;&gt;Copy&lt;&#x2F;a&gt; trait. The function plusOne implicitly received a Copy of the variable num and thus we did not transfer ownership.&lt;&#x2F;p&gt;
&lt;p&gt;Let&#x27;s see how Rust transfers ownership of a struct that doesn&#x27;t implement Copy&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;Person{
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name&lt;&#x2F;span&gt;&lt;span&gt;: String
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;getName&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: Person) {
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;name is &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, pers.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; drops the variable
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)};
&lt;&#x2F;span&gt;&lt;span&gt;    getName(Carl); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints name is Carl
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; but we can no longer user Carl as it was dropped 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; println!(&amp;quot;{}&amp;quot;, Carl.name); would not work here as it did with num above
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;In order to use Carl, after calling getName, we&#x27;d be required to pass it as a reference using &amp;amp;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;... 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;getName&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;Person) {
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;name is &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, pers.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; does not drop the variable
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)};
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; placing an &amp;amp; before the variable passes it as borrowed
&lt;&#x2F;span&gt;&lt;span&gt;    getName(&amp;amp;Carl); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints name is Carl
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl 
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We could also transfer ownership of Carl to another variable just as we could into a function.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;...
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)};            
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; move ownership
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; Carl2 = Carl;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Carl is no longer available 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Carl2 is available
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl2.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;A variable can also be converted to mutable when moving it&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;...
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)};            
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; move to mutable ownership
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl2 = Carl;
&lt;&#x2F;span&gt;&lt;span&gt;    Carl2.name = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl2&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl2.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl2
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Alternatively, a function can take a mutable borrow and change the value without deleting the variable.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;...
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; changes the borrowed variable without dropping it 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;changeName&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Person) {
&lt;&#x2F;span&gt;&lt;span&gt;    pers.name = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl2&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)};            
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl2 = Carl;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    changeName(&amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Carl2);
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl2.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl2
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;However, if the variable is a primitive then ownership is not transferred.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; a = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;10&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; a is cloned and thus is not dropped
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; b = a; 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{a}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt; and &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{b}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt; are clones&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints 10 and 10
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;While a variable is borrowed mutably it cannot also be borrowed immutably. Only when the variable is no longer referenced by the borrower can it be again borrowed.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;Person {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name&lt;&#x2F;span&gt;&lt;span&gt;: String
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;()}; 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; borrow Carl mutably
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; borrowCarlMutably = &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Carl;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Carl&amp;#39;s name is indirectly changed to Carl2
&lt;&#x2F;span&gt;&lt;span&gt;    borrowCarlMutably.name = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl2&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Carl cannot be assigned to an immutable variable as so:
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; let c = &amp;amp;Carl;
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, borrowCarlMutably.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl2
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Carl can now again be borrowed immutably because 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; borrowCarlMutably is no longer referenced
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; borrowCarlImmutably = &amp;amp;Carl;
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, borrowCarlImmutably.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl2
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Carl is still the owner as we only borrowed it above 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Now that the mutable borrow is dropped we can use it again
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Carl2
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Variables stored as an &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;doc.rust-lang.org&#x2F;std&#x2F;option&#x2F;&quot;&gt;Option&lt;&#x2F;a&gt; type will be dropped in a match statement unless the unpacked variable is prefixed with &lt;code&gt;ref&lt;&#x2F;code&gt;.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;(){
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; name = Some(String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;));
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match&lt;&#x2F;span&gt;&lt;span&gt; name {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; notice the ref keyword
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Using Some(n) .. will not compile 
&lt;&#x2F;span&gt;&lt;span&gt;        Some(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;ref&lt;&#x2F;span&gt;&lt;span&gt; n) =&amp;gt; println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Hello &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, n),
&lt;&#x2F;span&gt;&lt;span&gt;        _ =&amp;gt; println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;no value&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;),
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; if ref is not added, this would cause the program to not compile 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; since name would have been dropped in the match statement
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Hello again &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, name.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;());
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h3 id=&quot;lifetimes&quot;&gt;Lifetimes&lt;&#x2F;h3&gt;
&lt;p&gt;Rust also requires that a borrowed variable&#x27;s data have a lifetime. Simply because you wouldn&#x27;t want your borrowed variable to be dropped before you&#x27;re done using it.&lt;&#x2F;p&gt;
&lt;p&gt;In fact the mutable variable we declared in the code right above was implementing lifetimes.&lt;&#x2F;p&gt;
&lt;p&gt;This code will NOT compile because the lifetime of borrowCarlMutably ends when we use Carl.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;...
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;()}; 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; borrow Carl mutably
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; borrowCarlMutably = &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Carl;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; using Carl means borrowCarlMutably can no longer be used
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; because its lifetime has gone out of scope 
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl.name); 
&lt;&#x2F;span&gt;&lt;span&gt;    
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; WRONG! 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; this should be moved above println before using Carl 
&lt;&#x2F;span&gt;&lt;span&gt;    borrowCarlMutably.name = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;john&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;So far we haven&#x27;t seen the syntax of lifetimes, even though I have passed borrowed variables into functions above.&lt;&#x2F;p&gt;
&lt;p&gt;The reason is that Rust elides (omits) them for for simple functions that don&#x27;t cause the compiler to decide which to return.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;Person {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name&lt;&#x2F;span&gt;&lt;span&gt;: String
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Elided 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;changeName&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Person) {
&lt;&#x2F;span&gt;&lt;span&gt;    pers.name = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;joe&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Expanded
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;changeName&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a mut&lt;&#x2F;span&gt;&lt;span&gt; Person) {
&lt;&#x2F;span&gt;&lt;span&gt;    pers.name = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;joe&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;()}; 
&lt;&#x2F;span&gt;&lt;span&gt;    changeName(&amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Carl);
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl.name);
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;However more complicated functions that have borrowed variables with different lifetimes will require explicitly telling the compiler.&lt;&#x2F;p&gt;
&lt;p&gt;Note that an apostraphe is required for a lifetime&#x27;s syntax however the name can be anything. It&#x27;s common convention to use different letters for different lifetimes (e.g., &lt;code&gt;&#x27;a&lt;&#x2F;code&gt;, &lt;code&gt;&#x27;b&lt;&#x2F;code&gt;)&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;Person {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name&lt;&#x2F;span&gt;&lt;span&gt;: String
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;changeName&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;b&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a mut&lt;&#x2F;span&gt;&lt;span&gt; Person, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newName&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;b str&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;    pers.name = newName.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;()}; 
&lt;&#x2F;span&gt;&lt;span&gt;    
&lt;&#x2F;span&gt;&lt;span&gt;    {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; variables in this scope have different lifetimes 
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; than those outside of {}
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; newName = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Mario&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;        changeName(&amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Carl, newName);
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl.name); &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; prints Mario
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Essentially, Rust is making sure that any borrowed value returned from the function will live at least as long as the lifetime of one of the inputs. The compiler can then make a decision as to whether your code is valid.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;Person {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name&lt;&#x2F;span&gt;&lt;span&gt;: String
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; now we return a borrowed variable with a lifetime 
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; of newName
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;changeName&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;b&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pers&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a mut&lt;&#x2F;span&gt;&lt;span&gt; Person, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newName&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;b str&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;b str &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;    pers.name = newName.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    &amp;amp;newName
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; Carl = Person{name: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Carl&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;()}; 
&lt;&#x2F;span&gt;&lt;span&gt;    {
&lt;&#x2F;span&gt;&lt;span&gt;       &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; newName = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Mario&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;       &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span&gt;_ =  changeName(&amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; Carl, newName);
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, Carl.name);
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;There exists a reserved lifetime called &lt;code&gt;&#x27;static&lt;&#x2F;code&gt; that signifies to the compiler that the variable will live for the entire lifetime of the program. The variable will be embedded into the binary.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;static &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;GLOBAL&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;static str &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;global static variable&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;GLOBAL&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;In my opinion, much of the struggle that people have wrestling with the borrow checker stems from gaps in knowledge related to ownership and lifetimes.&lt;&#x2F;p&gt;
&lt;p&gt;The quizzes in the brown.edu git book definitely help filling those gaps.&lt;&#x2F;p&gt;
&lt;p&gt;If Rust still seems confusing then I recommend &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;fasterthanli.me&#x2F;articles&#x2F;a-half-hour-to-learn-rust&quot;&gt;A half-hour to learn Rust&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
</content>
        
    </entry>
    <entry xml:lang="en">
        <title>Dockerless, Elixir Web Application using Podman and Plug</title>
        <published>2023-06-06T00:00:00+00:00</published>
        <updated>2023-06-06T00:00:00+00:00</updated>
        
        <author>
          <name>
            
              Unknown
            
          </name>
        </author>
        
        <link rel="alternate" type="text/html" href="https://spacedimp.com/blog/dockerless-setting-up-an-elixir-webapp-using-podman-and-plug/"/>
        <id>https://spacedimp.com/blog/dockerless-setting-up-an-elixir-webapp-using-podman-and-plug/</id>
        
        <content type="html" xml:base="https://spacedimp.com/blog/dockerless-setting-up-an-elixir-webapp-using-podman-and-plug/">&lt;h2 id=&quot;demonstration-of-how-to-containerize-an-elixir-web-app-rootless-for-security-inside-of-podman&quot;&gt;Demonstration of how to containerize an Elixir web app. Rootless, for security, inside of Podman.&lt;&#x2F;h2&gt;
&lt;p&gt;Also we&#x27;ll be using the &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;hexdocs.pm&#x2F;plug&#x2F;readme.html&quot;&gt;Plug&lt;&#x2F;a&gt; module to keep things simple.
This module is at the heart of popular Elixir web frameworks such as &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;hexdocs.pm&#x2F;phoenix&#x2F;plug.html&quot;&gt;Phoenix&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;blockquote&gt;
&lt;p&gt;Plug lives at the heart of Phoenix&#x27;s HTTP layer, and Phoenix puts Plug front and center.&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;br&gt;
&lt;h3 id=&quot;setup&quot;&gt;Setup:&lt;&#x2F;h3&gt;
&lt;p&gt;First, we need Podman so head on over to the &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;podman.io&#x2F;docs&#x2F;installation&quot;&gt;official&lt;&#x2F;a&gt; instllation instructions and then come back.&lt;&#x2F;p&gt;
&lt;p&gt;Next we need an image that we can install Elixir on.. I&#x27;ll use Alpine Linux.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; search alpine&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --filter&lt;&#x2F;span&gt;&lt;span&gt; is-official
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Go ahead and pull it:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; image pull docker.io&#x2F;library&#x2F;alpine
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Check that it installed:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; image list alpine
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now run it (more networking options &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.oracle.com&#x2F;en&#x2F;operating-systems&#x2F;oracle-linux&#x2F;podman&#x2F;podman-ConfiguringNetworkingforPodman.html#configuring-podman-networking&quot;&gt;here&lt;&#x2F;a&gt;):&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# -p host-port:container-port 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -dit --name&lt;&#x2F;span&gt;&lt;span&gt; alp&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --network&lt;&#x2F;span&gt;&lt;span&gt;=bridge&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -p&lt;&#x2F;span&gt;&lt;span&gt; 7070:7070 alpine &#x2F;bin&#x2F;ash
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;h3 id=&quot;connect-to-container-and-install-elixir&quot;&gt;Connect to container and install Elixir:&lt;&#x2F;h3&gt;
&lt;p&gt;Make sure the container is running first:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; ps 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;If you don&#x27;t see any output then you must start the container:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; start alp
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Attach to container:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; attach alp
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;p&gt;You should now be logged in as root (don&#x27;t worry this root can&#x27;t do harm outside of the container)&lt;&#x2F;p&gt;
&lt;p&gt;Add a user that has sudo (inside the container):&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;adduser&lt;&#x2F;span&gt;&lt;span&gt; alpine
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# enter a password for this user
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# you could also change root&amp;#39;s password with this command: passwd
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Install the sudo program:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;apk&lt;&#x2F;span&gt;&lt;span&gt; add sudo
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Use visudo to allow the group wheel to use sudo:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;visudo
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# uncomment the line
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# %wheel ALL=(ALL:ALL) ALL
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;You&#x27;ll need to know a few vim commands to use visudo. If you really don&#x27;t know then
search up a quick tutorial. Hey you might end up liking vim.&lt;&#x2F;p&gt;
&lt;p&gt;Now add the new user to the wheel group:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;adduser&lt;&#x2F;span&gt;&lt;span&gt; alp wheel &amp;amp;&amp;amp; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;su&lt;&#x2F;span&gt;&lt;span&gt; alp
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;You should be the alp user now and not root.&lt;&#x2F;p&gt;
&lt;p&gt;Install Elixir:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; apk add elixir &amp;amp;&amp;amp; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;cd &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;~
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;h3 id=&quot;create-an-elixir-web-app&quot;&gt;Create an Elixir web app:&lt;&#x2F;h3&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mix&lt;&#x2F;span&gt;&lt;span&gt; new myapp&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --sup
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We&#x27;ll now install the Plug dependency:&lt;&#x2F;p&gt;
&lt;p&gt;Edit &lt;code&gt;mix.ex&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;vi&lt;&#x2F;span&gt;&lt;span&gt; mix.ex
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# and make sure deps has plug as shown below
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;pre data-lang=&quot;md&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-md &quot;&gt;&lt;code class=&quot;language-md&quot; data-lang=&quot;md&quot;&gt;&lt;span&gt;defp deps do
&lt;&#x2F;span&gt;&lt;span&gt;  [
&lt;&#x2F;span&gt;&lt;span&gt;    {:plug, &amp;quot;~&amp;gt; 1.14&amp;quot;},
&lt;&#x2F;span&gt;&lt;span&gt;    {:plug_cowboy, &amp;quot;~&amp;gt; 2.0&amp;quot;}
&lt;&#x2F;span&gt;&lt;span&gt;  ]
&lt;&#x2F;span&gt;&lt;span&gt;end
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now install plug:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mix&lt;&#x2F;span&gt;&lt;span&gt; deps.get 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# You&amp;#39;ll be asked to install hex. Type Y
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Great!&lt;&#x2F;p&gt;
&lt;p&gt;Now let&#x27;s make the app fault tolerant by having the application supervise it:&lt;&#x2F;p&gt;
&lt;p&gt;Edit &lt;code&gt;lib&#x2F;myapp&#x2F;application.ex&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;def&lt;&#x2F;span&gt;&lt;span&gt; start(_type, _args) &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;do
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;children&lt;&#x2F;span&gt;&lt;span&gt; = [
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;{Plug.Cowboy,&lt;&#x2F;span&gt;&lt;span&gt; scheme: :http, plug: Myapp, options: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;[&lt;&#x2F;span&gt;&lt;span&gt;port: 7070&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;]&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;]
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Lastly we&#x27;ll add a router to the web app, Edit &lt;code&gt;lib&#x2F;myapp.ex&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;elixir&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-elixir &quot;&gt;&lt;code class=&quot;language-elixir&quot; data-lang=&quot;elixir&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;defmodule &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e5c07b;&quot;&gt;Myapp &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;do
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e5c07b;&quot;&gt;Plug&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e5c07b;&quot;&gt;Router
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;	# matches a route
&lt;&#x2F;span&gt;&lt;span&gt;	plug &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;:match
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;	# then forwards it to a dispatch 
&lt;&#x2F;span&gt;&lt;span&gt;	plug &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;:dispatch
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	get &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;do 
&lt;&#x2F;span&gt;&lt;span&gt;		send_resp(conn, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;200&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;homepage&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;end
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	get &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;hello&#x2F;:name&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;do
&lt;&#x2F;span&gt;&lt;span&gt;		send_resp(conn, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;200&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Hi #{&lt;&#x2F;span&gt;&lt;span&gt;name}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;end
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;	# 404
&lt;&#x2F;span&gt;&lt;span&gt;	get _ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;do 
&lt;&#x2F;span&gt;&lt;span&gt;		send_resp(conn, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;404&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;404 not found&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;end
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;end
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Start it up:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mix&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --no-halt
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Open up your browser and head over to &lt;code&gt;localhost:7070&#x2F;hello&#x2F;world&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;br&gt; 
&lt;h3 id=&quot;build-an-image-from-it&quot;&gt;Build an image from it&lt;&#x2F;h3&gt;
&lt;p&gt;Now we should compile the web app into a binary and also create an
image from the container to make it portable.&lt;&#x2F;p&gt;
&lt;p&gt;First let&#x27;s compile the code.&lt;&#x2F;p&gt;
&lt;p&gt;In the container&#x27;s terminal run:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;MIX_ENV&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;prod 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;RELEASE_NAME&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;myapp
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mix&lt;&#x2F;span&gt;&lt;span&gt; release.init
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;compile:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mix&lt;&#x2F;span&gt;&lt;span&gt; release
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;You should now have a binary located at:&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;_build&#x2F;dev&#x2F;rel&#x2F;myapp&#x2F;bin&#x2F;myapp&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;You can run it as so:&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;_build&#x2F;dev&#x2F;rel&#x2F;myapp&#x2F;bin&#x2F;myapp start&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;We can now exit the container so that we can build an image with this
binary installed.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;exit &amp;amp;&amp;amp; exit&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;In your host terminal run:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; commit alp alp:v2
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now we can start up the new container with the binary running by default:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;podman&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -dit --network&lt;&#x2F;span&gt;&lt;span&gt;=bridge&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -p&lt;&#x2F;span&gt;&lt;span&gt; 7070:7070&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --name&lt;&#x2F;span&gt;&lt;span&gt; alp2 alp:v2 &#x2F;home&#x2F;alpine&#x2F;myapp&#x2F;_build&#x2F;dev&#x2F;rel&#x2F;myapp&#x2F;bin&#x2F;myapp start
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h3 id=&quot;wrap-up&quot;&gt;Wrap up&lt;&#x2F;h3&gt;
&lt;p&gt;The main benefits of using Podman over Docker are security related. I won&#x27;t rehash it all here so if you
want to learn more check out linode&#x27;s &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;www.linode.com&#x2F;docs&#x2F;guides&#x2F;podman-vs-docker&#x2F;&quot;&gt;explanation&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;p&gt;I suggest learning more about plug and its router from &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;elixirschool.com&#x2F;blog&#x2F;building-apps-with-plug-router&#x2F;&quot;&gt;elixirschool&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;br&gt;
</content>
        
    </entry>
    <entry xml:lang="en">
        <title>Using Rust, Tauri, and SvelteKit to Build a Note Taking App</title>
        <published>2023-04-05T00:00:00+00:00</published>
        <updated>2023-04-05T00:00:00+00:00</updated>
        
        <author>
          <name>
            
              Unknown
            
          </name>
        </author>
        
        <link rel="alternate" type="text/html" href="https://spacedimp.com/blog/using-rust-tauri-and-sveltekit-to-build-a-note-taking-app/"/>
        <id>https://spacedimp.com/blog/using-rust-tauri-and-sveltekit-to-build-a-note-taking-app/</id>
        
        <content type="html" xml:base="https://spacedimp.com/blog/using-rust-tauri-and-sveltekit-to-build-a-note-taking-app/">&lt;h2 id=&quot;in-this-blog-post-i-ll-be-guiding-you-through-the-process-of-building-a-note-taking-app-using-tauri-move-over-electron&quot;&gt;In this blog post, I&#x27;ll be guiding you through the process of building a note taking app using Tauri. Move over Electron :)&lt;&#x2F;h2&gt;
&lt;p&gt;&lt;img src=&quot;&#x2F;img&#x2F;gif&#x2F;noteapp.gif&quot; alt=&quot;Alt text&quot; title=&quot;demo of an app built using Rust, Tauri, and SvelteKit&quot; &#x2F;&gt;&lt;&#x2F;p&gt;
&lt;p&gt;Tauri allows us to build fast, cross-platform, and small sized apps using HTML, CSS, and JavaScript.&lt;&#x2F;p&gt;
&lt;p&gt;It accomplishes this by using &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;tauri.app&#x2F;v1&#x2F;references&#x2F;webview-versions&#x2F;&quot;&gt;WebViews&lt;&#x2F;a&gt;. A WebView lets you embed
web content (HTML,CSS, JavaScript) into an application without needing a full-fledged web browser.&lt;&#x2F;p&gt;
&lt;p&gt;Rust is used for the backend logic and &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Learn&#x2F;Tools_and_testing&#x2F;Client-side_JavaScript_frameworks&#x2F;Svelte_getting_started&quot;&gt;SvelteKit&lt;&#x2F;a&gt; for the frontend.&lt;&#x2F;p&gt;
&lt;p&gt;Each OS uses a different WebView rendering engine:&lt;&#x2F;p&gt;
&lt;ul&gt;
&lt;li&gt;Windows uses WebView2&lt;&#x2F;li&gt;
&lt;li&gt;Linux uses WebKit&lt;&#x2F;li&gt;
&lt;&#x2F;ul&gt;
&lt;h2 id=&quot;setting-up-the-project&quot;&gt;Setting up the project&lt;&#x2F;h2&gt;
&lt;p&gt;Make sure Rust and the Tauri dependencies are installed as described &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;tauri.app&#x2F;v1&#x2F;guides&#x2F;getting-started&#x2F;prerequisites&quot;&gt;here&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;p&gt;SvelteKit requires Node.js. I install it using Fedora&#x27;s package manager.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; dnf install nodejs
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Instead of npm, I&#x27;ll install pnpm as the Node.js package manager&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; npm install&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -g&lt;&#x2F;span&gt;&lt;span&gt; pnpm
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now we can initialize a new svelte project.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; mkdir notes &amp;amp;&amp;amp; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;cd&lt;&#x2F;span&gt;&lt;span&gt; notes
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; pnpm create svelte 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; hit enter to create the project in the current directory
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; use down arrow key to select Skeleton project
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; use down arrow key to select Yes, using Typescript syntax
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; use space bar to select 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F; &lt;&#x2F;span&gt;&lt;span&gt;* Add ESLint for code linting
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F; &lt;&#x2F;span&gt;&lt;span&gt;* Add Prettier for code formatting
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; @next gets latest version
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; pnpm add&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -D&lt;&#x2F;span&gt;&lt;span&gt; @sveltejs&#x2F;adapter-static@next
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;edit svelte.config.js&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;js&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-js &quot;&gt;&lt;code class=&quot;language-js&quot; data-lang=&quot;js&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; change adapter-auto to adapter-static 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;adapter &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@sveltejs&#x2F;adapter-static&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;...
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; add prerender entries 
&lt;&#x2F;span&gt;&lt;span&gt;kit: {
&lt;&#x2F;span&gt;&lt;span&gt;		adapter: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;adapter&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;		prerender: {
&lt;&#x2F;span&gt;&lt;span&gt;			entries: [&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;*&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;&#x2F;edit&#x2F;*&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;		}
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Disable SSR by creating src&#x2F;routes&#x2F;+layout.ts&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;export const &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;prerender &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;true&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;export const &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;ssr &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;false&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Check your node.js version and make sure pnpm uses the correct one&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; node&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -v 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;v18.15.0 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; edit .npmrc 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; vi .npmrc 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; add your version number as so
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;use-node-version&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;18.15.0
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Setup Tauri&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; pnpm add&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -D&lt;&#x2F;span&gt;&lt;span&gt; @tauri-apps&#x2F;cli
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; pnpm tauri init
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; What is your app name? notes
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; What should the window title be? notes
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; Where are your web assets ..? ..&#x2F;build
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; What is the URL of your dev server? http:&#x2F;&#x2F;localhost:5173
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; What is your frontend dev command? pnpm run dev
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; What is your frontend build command? pnpm run build
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Run the app&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;&#x2F;&#x2F;&lt;&#x2F;span&gt;&lt;span&gt; will be slow the first time running but after much faster
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; pnpm tauri dev
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;setting-up-components&quot;&gt;Setting up components&lt;&#x2F;h2&gt;
&lt;p&gt;I recommend for beginners to go through the official Svelte tutorial &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;svelte.dev&#x2F;tutorial&#x2F;basics&quot;&gt;here&lt;&#x2F;a&gt; to grasp its fundamentals.&lt;&#x2F;p&gt;
&lt;p&gt;This is an excerpt of what a component is:&lt;&#x2F;p&gt;
&lt;blockquote&gt;
&lt;p&gt;In Svelte, an application is composed from one or more components. A component is a reusable self-contained block of code that encapsulates HTML, CSS and JavaScript that belong together, written into a .svelte file. The &#x27;hello world&#x27; example in the code editor is a simple component.&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;p&gt;I&#x27;ll be creating two components inside of &lt;code&gt;src&#x2F;lib&lt;&#x2F;code&gt;. One called &lt;code&gt;Notes.svelte&lt;&#x2F;code&gt; will display all notes created. The other called &lt;code&gt;CreateNote.svelte&lt;&#x2F;code&gt; will be a text box where we can add new notes.&lt;&#x2F;p&gt;
&lt;p&gt;Create &lt;code&gt;src&#x2F;lib&#x2F;Notes.svelte&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script lang&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;ts&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;First Note&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;notes&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;p&amp;gt; {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;} &amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;p&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Create &lt;code&gt;src&#x2F;lib&#x2F;CreateNote.svelte&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script lang&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;ts&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newNote&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newTitle&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;h1&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Create a Note &lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h1&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea &lt;&#x2F;span&gt;&lt;span&gt;bind:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;value&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newTitle&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note-title&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;placeholder&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Note title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;textarea&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea &lt;&#x2F;span&gt;&lt;span&gt;bind:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;value&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newNote&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note-box&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;placeholder&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Note body&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;textarea&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;A page is a route to a certain path. &lt;code&gt;src&#x2F;routes&#x2F;+page.svelte&lt;&#x2F;code&gt; will be the homepage, for instance.&lt;&#x2F;p&gt;
&lt;p&gt;Import the components into the page by editing &lt;code&gt;src&#x2F;routes&#x2F;+page.svelte&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script lang&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;ts&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Notes &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;Notes.svelte&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;CreateNote &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;CreateNote.svelte&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;container&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;CreateNote&lt;&#x2F;span&gt;&lt;span&gt;&#x2F;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Notes&lt;&#x2F;span&gt;&lt;span&gt;&#x2F;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;You could place CSS style tags into each Page or Component, but I prefer a global CSS file.&lt;&#x2F;p&gt;
&lt;p&gt;Create &lt;code&gt;static&#x2F;global.css&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;CSS&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-CSS &quot;&gt;&lt;code class=&quot;language-CSS&quot; data-lang=&quot;CSS&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;* CSS reset *&#x2F;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;*&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;*&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;before, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;*&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;after &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  box-sizing: border-box;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;* &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  margin: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;html&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  height: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100%&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  line-height: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;1.5&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;  -webkit-font-smoothing: antialiased;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;img&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;picture&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;video&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;canvas&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;svg &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  display: block;
&lt;&#x2F;span&gt;&lt;span&gt;  max-width: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100%&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;input&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;select &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  font: inherit;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;p&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h1&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h2&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h3&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h4&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h5&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h6 &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  overflow-wrap: break-word;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;#root&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;#__next &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;  isolation: isolate;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;* Component and Page CSS *&#x2F;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;#container &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;	box-sizing: border-box;
&lt;&#x2F;span&gt;&lt;span&gt;	width: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100%&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	height: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;100%&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	display: flex;
&lt;&#x2F;span&gt;&lt;span&gt;	white-space: nowrap;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;#notes &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;	background: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;#eee&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Add it to &lt;code&gt;src&#x2F;app.html&lt;&#x2F;code&gt; inside of the head tag&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;html&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-html &quot;&gt;&lt;code class=&quot;language-html&quot; data-lang=&quot;html&quot;&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;link &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;rel&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;stylesheet&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;type&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;text&#x2F;css&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;href&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;%sveltekit.assets%&#x2F;global.css&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;I&#x27;ll be saving the notes in the frontend. For this we require Tauri&#x27;s frontend API.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; pnpm add&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -D&lt;&#x2F;span&gt;&lt;span&gt; @tauri-apps&#x2F;api
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We must tell Tauri which paths are available to our app. In this case I&#x27;ll be writing to a file called db.bson in the user&#x27;s home&#x2F;notes-db directory.&lt;&#x2F;p&gt;
&lt;p&gt;Edit &lt;code&gt;src-tauri&#x2F;tauri.conf.json&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;json&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-json &quot;&gt;&lt;code class=&quot;language-json&quot; data-lang=&quot;json&quot;&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;tauri&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: {
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;allowlist&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: {
&lt;&#x2F;span&gt;&lt;span&gt;      &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;all&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;false&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;	  &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;fs&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: {
&lt;&#x2F;span&gt;&lt;span&gt;	  	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;scope&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: [&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;$HOME&#x2F;notes-db&#x2F;*&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;$HOME&#x2F;notes-db&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;],
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;all&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;true
&lt;&#x2F;span&gt;&lt;span&gt;	  },
&lt;&#x2F;span&gt;&lt;span&gt;	  &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;path&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: {
&lt;&#x2F;span&gt;&lt;span&gt;	  	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;all&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;true
&lt;&#x2F;span&gt;&lt;span&gt;	  }
&lt;&#x2F;span&gt;&lt;span&gt;    },
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Also scroll down in the conf.json file and find &quot;identifier&quot; . It should be unique to your app. I&#x27;ll set it to com.random.random.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;json&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-json &quot;&gt;&lt;code class=&quot;language-json&quot; data-lang=&quot;json&quot;&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;bundle&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: {
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;identifier&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;com.random.random&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;handling-data-in-the-backend&quot;&gt;Handling data in the backend&lt;&#x2F;h2&gt;
&lt;p&gt;I&#x27;ve chosen to store the data as bson (Binary JSON). Read more about bson &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;www.mongodb.com&#x2F;json-and-bson&quot;&gt;here&lt;&#x2F;a&gt;. Basically it&#x27;s how MongoDB stores JSON data on disk as binary.&lt;&#x2F;p&gt;
&lt;p&gt;Tauri lets the frontend pass data back and forth to the backend (Rust) using Tauri commands.&lt;&#x2F;p&gt;
&lt;p&gt;For the sake of brevity I&#x27;ll just show the complete Rust backend code.&lt;&#x2F;p&gt;
&lt;p&gt;Edit &lt;code&gt;src-tauri&#x2F;src&#x2F;main.rs&lt;&#x2F;code&gt; with:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;#![&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cfg_attr&lt;&#x2F;span&gt;&lt;span&gt;(
&lt;&#x2F;span&gt;&lt;span&gt;  &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;all&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;not&lt;&#x2F;span&gt;&lt;span&gt;(debug_assertions), target_os = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;windows&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;),
&lt;&#x2F;span&gt;&lt;span&gt;  windows_subsystem = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;windows&amp;quot;
&lt;&#x2F;span&gt;&lt;span&gt;)]
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;bson::{Document};
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;serde::{Serialize, Deserialize};
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::io::{Cursor};
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use&lt;&#x2F;span&gt;&lt;span&gt; serde_json;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Serialize, Deserialize, Debug)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;struct &lt;&#x2F;span&gt;&lt;span&gt;Note {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;bson_uuid&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;date_time&lt;&#x2F;span&gt;&lt;span&gt;: bson::DateTime,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; builds a new Note object for the froteend
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; we then convert it to a bson document 
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; lastly we convert it into a vec of bytes to store on disk (frontend handles appending then saving this to disk)
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tauri&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;command&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;saveNote&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;str&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;str&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; Vec&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;u8&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; note = Note { bson_uuid: bson::Uuid::new().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;(), date_time: bson::DateTime::now(), title: title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;(), body: body.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;() };
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; note_doc = bson::to_document(&amp;amp;note).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span&gt;bson::to_vec(&amp;amp;note_doc).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; after the frontend edits or deletes a note 
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; it must be saved back to db.bson
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tauri&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;command&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;editNote&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;data&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;str&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; Vec&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;u8&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; vecNotes: Vec&amp;lt;Note&amp;gt; = serde_json::from_str(data).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;(); 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; vecDocs: Vec&amp;lt;Document&amp;gt; = vecNotes.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;iter&lt;&#x2F;span&gt;&lt;span&gt;().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;map&lt;&#x2F;span&gt;&lt;span&gt;(|&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;e&lt;&#x2F;span&gt;&lt;span&gt;| bson::to_document(&amp;amp;e).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;() ).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;collect&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; docsArray: Vec&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;u8&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; = vecDocs.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;clone&lt;&#x2F;span&gt;&lt;span&gt;().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_iter&lt;&#x2F;span&gt;&lt;span&gt;().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;flat_map&lt;&#x2F;span&gt;&lt;span&gt;(|&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;e&lt;&#x2F;span&gt;&lt;span&gt;| bson::to_vec(&amp;amp;e.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;clone&lt;&#x2F;span&gt;&lt;span&gt;()).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;()).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;collect&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return&lt;&#x2F;span&gt;&lt;span&gt; docsArray; 
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; loading the raw data from db.bson requires us to convert it to JSON
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; for the frontend to interact with
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tauri&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;command&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;loadNotes&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;data&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;str&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; String{
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; check if database is empty. 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Return if it is otherwise the program will crash 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if&lt;&#x2F;span&gt;&lt;span&gt; data.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;chars&lt;&#x2F;span&gt;&lt;span&gt;().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;count&lt;&#x2F;span&gt;&lt;span&gt;() == &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0 &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span&gt;String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;no data&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;   }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; frontend passes the database as a string array of bytes 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; parse it into bytes 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; mybytes: Vec&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;u8&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; = data
&lt;&#x2F;span&gt;&lt;span&gt;       .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;trim_matches&lt;&#x2F;span&gt;&lt;span&gt;(|&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;c&lt;&#x2F;span&gt;&lt;span&gt;| c == &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;[&amp;#39; &lt;&#x2F;span&gt;&lt;span&gt;|| c== &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;]&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;       .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;split&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;,&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;       .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;map&lt;&#x2F;span&gt;&lt;span&gt;(|&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;s&lt;&#x2F;span&gt;&lt;span&gt;| s.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;parse&lt;&#x2F;span&gt;&lt;span&gt;().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;())
&lt;&#x2F;span&gt;&lt;span&gt;       .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;collect&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;  
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; now we iterate through the bytes and convert it 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; to a Vec of bson Document 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; curs = Cursor::new(mybytes);
&lt;&#x2F;span&gt;&lt;span&gt;   curs.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;set_position&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; array_len = curs.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get_ref&lt;&#x2F;span&gt;&lt;span&gt;().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;len&lt;&#x2F;span&gt;&lt;span&gt;() as &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;u64&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; docs = Vec::new();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for &lt;&#x2F;span&gt;&lt;span&gt;_ in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;..array_len {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match &lt;&#x2F;span&gt;&lt;span&gt;Document::from_reader(&amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; curs) {
&lt;&#x2F;span&gt;&lt;span&gt;            Ok(doc) =&amp;gt; {println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;\n\n&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, doc); docs.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;push&lt;&#x2F;span&gt;&lt;span&gt;(doc);},
&lt;&#x2F;span&gt;&lt;span&gt;            Err(e) =&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;                println!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Error &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{:?}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, e);
&lt;&#x2F;span&gt;&lt;span&gt;                &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;break&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;            }
&lt;&#x2F;span&gt;&lt;span&gt;        }
&lt;&#x2F;span&gt;&lt;span&gt;   }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; return to the frontend an array of bson documents as JSON
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span&gt;serde_json::to_string(&amp;amp;docs).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;  tauri::Builder::default()
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;invoke_handler&lt;&#x2F;span&gt;&lt;span&gt;(tauri::generate_handler![saveNote, editNote, loadNotes])
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;run&lt;&#x2F;span&gt;&lt;span&gt;(tauri::generate_context!())
&lt;&#x2F;span&gt;&lt;span&gt;    .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;expect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;error while running tauri application&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;I create a Tauri app with three functions available to the frontend: saveNote, editNote, loadNotes&lt;&#x2F;p&gt;
&lt;p&gt;saveNote will be called from the frontend and be passed two values: title, body. I then create a new Note struct with those values then convert it to a bson::Document. Lastly I convert the document to a bson::Array (Vec of bytes) and return it to the frontend to handle storing it to disk.&lt;&#x2F;p&gt;
&lt;p&gt;editNote receives from the frontend an updated&#x2F;modified version of the data stored on disk. The frontend requires this function to rebuild the bson database. We then return the binary bson back to the frontend to store to disk.&lt;&#x2F;p&gt;
&lt;p&gt;loadNotes takes what&#x27;s stored on disk &quot;[123],[100],etc..&quot; and converts it to JSON for the frontend.&lt;&#x2F;p&gt;
&lt;p&gt;Also, edit &lt;code&gt;src-tauri&#x2F;Cargo.toml&lt;&#x2F;code&gt; to include bson as a dependency&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;toml&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-toml &quot;&gt;&lt;code class=&quot;language-toml&quot; data-lang=&quot;toml&quot;&gt;&lt;span&gt;[dependencies]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;bson &lt;&#x2F;span&gt;&lt;span&gt;= {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;2.6.0&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;handling-data-in-the-frontend&quot;&gt;Handling data in the frontend&lt;&#x2F;h2&gt;
&lt;p&gt;Svelte&#x27;s &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Learn&#x2F;Tools_and_testing&#x2F;Client-side_JavaScript_frameworks&#x2F;Svelte_stores&quot;&gt;writable&lt;&#x2F;a&gt; store allows each component or page to individually modify&#x2F;read a global state. Whenever it changes, all components get the newly changed value.&lt;&#x2F;p&gt;
&lt;p&gt;Create and edit &lt;code&gt;src&#x2F;lib&#x2F;store.js&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;js&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-js &quot;&gt;&lt;code class=&quot;language-js&quot; data-lang=&quot;js&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;writable &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;svelte&#x2F;store&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;homeDir&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;join &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;path&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;exists&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;createDir&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;writeBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;readBinaryFile &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;fs&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;invoke&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;tauri&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; This value gets initialized when loadStore() is called
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; contains all bson stored on disk but as JSON
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;export const &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;myStore &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;writable&lt;&#x2F;span&gt;&lt;span&gt;({});
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; initialize myStore with the contents in the database
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; let Rust convert the binary to an array of JSON
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;export async function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;loadStore&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;binData &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;readBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;.&#x2F;notes-db&#x2F;db.bson&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;invoke&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;loadNotes&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {data: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;binData&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;toString&lt;&#x2F;span&gt;&lt;span&gt;()}).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;then&lt;&#x2F;span&gt;&lt;span&gt;((&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;dat&lt;&#x2F;span&gt;&lt;span&gt;) &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;myStore&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;set&lt;&#x2F;span&gt;&lt;span&gt;(JSON.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;parse&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;dat&lt;&#x2F;span&gt;&lt;span&gt;));
&lt;&#x2F;span&gt;&lt;span&gt;		});
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; send the updated JSON to the backend as a string
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; the backend converts it to an array of bson documents as bytes and we store it to db.bson 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;export async function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;editStore&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newVal&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;jsonToString &lt;&#x2F;span&gt;&lt;span&gt;= JSON.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;stringify&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newVal&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; send the updated store to the backend
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;invoke&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;editNote&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {data: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;jsonToString&lt;&#x2F;span&gt;&lt;span&gt;}).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;then&lt;&#x2F;span&gt;&lt;span&gt;((&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;dat&lt;&#x2F;span&gt;&lt;span&gt;) &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; store the updated bson to disk
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;data &lt;&#x2F;span&gt;&lt;span&gt;= new Uint8Array(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;dat&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;writeBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;.&#x2F;notes-db&#x2F;db.bson&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;data&lt;&#x2F;span&gt;&lt;span&gt;, {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;loadStore&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;	});
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Edit &lt;code&gt;src&#x2F;routes&#x2F;+pages.svelte&lt;&#x2F;code&gt; to call loadStore from above. Also to pass the store to the components.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;script&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;myStore&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;loadStore &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;store.js&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;  	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;homeDir&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;join &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;path&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;  	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;exists&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;createDir&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;writeBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;readBinaryFile &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;fs&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;  	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;invoke&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;tauri&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;  	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;onMount &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;svelte&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Notes &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;Notes.svelte&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;CreateNote &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;CreateNote.svelte&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;var &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;db&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; gets called whenever the page&#x2F;component gets mounted
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;onMount&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;async &lt;&#x2F;span&gt;&lt;span&gt;() &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; get the user&amp;#39;s home directory
&lt;&#x2F;span&gt;&lt;span&gt; 		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;home &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;homeDir&lt;&#x2F;span&gt;&lt;span&gt;();	
&lt;&#x2F;span&gt;&lt;span&gt; 		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; append the directory we&amp;#39;ll create
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;db &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;join&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;home&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;notes-db&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; check if notes-db directory exists. If not then create it
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;checkDB &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;exists&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;notes-db&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if &lt;&#x2F;span&gt;&lt;span&gt;(!&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;checkDB&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; if the directory doesn&amp;#39;t exist then create it
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;createDir&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;notes-db&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;, recursive: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;true &lt;&#x2F;span&gt;&lt;span&gt;});
&lt;&#x2F;span&gt;&lt;span&gt;		}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; check if db.bson exists. If not then create it. 
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;checkFile &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;exists&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;.&#x2F;notes-db&#x2F;db.bson&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if &lt;&#x2F;span&gt;&lt;span&gt;(!&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;checkFile&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;writeBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;.&#x2F;notes-db&#x2F;db.bson&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, new Uint8Array([]), {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});		
&lt;&#x2F;span&gt;&lt;span&gt;		}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; load myStore with what&amp;#39;s on disk
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;loadStore&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;  });
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;container&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;CreateNote&lt;&#x2F;span&gt;&lt;span&gt;&#x2F;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;** Pass myStore to the component **&#x2F;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Notes allNotes&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$myStore&lt;&#x2F;span&gt;&lt;span&gt;} &#x2F;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Edit &lt;code&gt;src&#x2F;lib&#x2F;Notes.svelte&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script lang&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;ts&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; This value gets bound to myStore 
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; &amp;lt;Notes allNotes={$myStore}&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;export let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;allNotes&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; bson stores Date as milliseconds
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Convert the date from milliseconds to human readbale
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;numToDate&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;num&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;toInt &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;parseInt&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;num&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;10&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;date &lt;&#x2F;span&gt;&lt;span&gt;= new Date(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;toInt&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;options &lt;&#x2F;span&gt;&lt;span&gt;= {
&lt;&#x2F;span&gt;&lt;span&gt;			year: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;numeric&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;			month: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;long&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;			day: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;numeric&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;			hour: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;numeric&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;			minute: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;numeric&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;		};
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;date&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;toLocaleString&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;undefined&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;options&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;	}
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Loop through each note and render it
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;notes&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	{#&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;allNotes&lt;&#x2F;span&gt;&lt;span&gt;.length &amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;	{#&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;each allNotes &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;as &lt;&#x2F;span&gt;&lt;span&gt;note }
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;note&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;			&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;a href&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;edit&#x2F;{note.bson_uuid}&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Edit&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;			&amp;lt;p&amp;gt; {note.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;} &amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;p&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;			&amp;lt;p&amp;gt; { &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;numToDate&lt;&#x2F;span&gt;&lt;span&gt;(note.date_time.$date.$numberLong) } &amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;p&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	{&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;each&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;** either still loading or no data exists **&#x2F;
&lt;&#x2F;span&gt;&lt;span&gt;	{:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;else&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;p&amp;gt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Try saving a note&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;p&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	{&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Edit &lt;code&gt;src&#x2F;lib&#x2F;CreateNote.svelte&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;script&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;invoke &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;tauri&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;loadStore &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;store.js&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;writeBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;readBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;@tauri-apps&#x2F;api&#x2F;fs&amp;#39;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; bound to value of title textarea
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newNote&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; bound to value of body textarea
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newTitle&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; This isn&amp;#39;t bound to $myStore as above
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; This gets assigned the raw binary stored on disk
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;allNotes&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;async function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;save&lt;&#x2F;span&gt;&lt;span&gt;(){
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; sets allNotes to contain the binary stored on disk
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;load&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Let the backend handle creating a new binary document
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;invoke&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;saveNote&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, {title: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newTitle&lt;&#x2F;span&gt;&lt;span&gt;, body: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newNote&lt;&#x2F;span&gt;&lt;span&gt;} ).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;then&lt;&#x2F;span&gt;&lt;span&gt;((&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;response&lt;&#x2F;span&gt;&lt;span&gt;) &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Here I simply merge the returned data with allNotes
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;loaded &lt;&#x2F;span&gt;&lt;span&gt;= new Uint8Array(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;allNotes&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;response &lt;&#x2F;span&gt;&lt;span&gt;= new Uint8Array(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;response&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mergeArray &lt;&#x2F;span&gt;&lt;span&gt;= new Uint8Array(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;loaded&lt;&#x2F;span&gt;&lt;span&gt;.length + &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;response&lt;&#x2F;span&gt;&lt;span&gt;.length);
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mergeArray&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;set&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;loaded&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mergeArray&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;set&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;response&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;loaded&lt;&#x2F;span&gt;&lt;span&gt;.length);
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; and save it to disk
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;writeBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;.&#x2F;notes-db&#x2F;db.bson&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;mergeArray&lt;&#x2F;span&gt;&lt;span&gt;, {dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});	
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; after saving, reload writable myStore with saved data on disk
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;loadStore&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; empty textarea contents after save	
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newNote &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newTitle &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;			});
&lt;&#x2F;span&gt;&lt;span&gt;	}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;async function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;load&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;allNotes &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;await &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;readBinaryFile&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;.&#x2F;notes-db&#x2F;db.bson&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;, { dir: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BaseDirectory&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Home&lt;&#x2F;span&gt;&lt;span&gt;});	
&lt;&#x2F;span&gt;&lt;span&gt;	}
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;h1&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Create a note &lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h1&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button &lt;&#x2F;span&gt;&lt;span&gt;on:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;click&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;save&lt;&#x2F;span&gt;&lt;span&gt;}&amp;gt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Save&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea &lt;&#x2F;span&gt;&lt;span&gt;bind:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;value&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newTitle&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note-title&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;placeholder&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Note title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;textarea&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea &lt;&#x2F;span&gt;&lt;span&gt;bind:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;value&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;newNote&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note-box&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;placeholder&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Note body&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;textarea&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Lastly, I&#x27;ll create another page that will be used to let the user edit a note. [slug] will be the note&#x27;s UUID.&lt;&#x2F;p&gt;
&lt;p&gt;Create &lt;code&gt;src&#x2F;routes&#x2F;edit&#x2F;[slug]&#x2F;+page.svelte&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;ts&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-ts &quot;&gt;&lt;code class=&quot;language-ts&quot; data-lang=&quot;ts&quot;&gt;&lt;span&gt;&amp;lt;script&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;myStore&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;editStore &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$lib&#x2F;store.js&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;page &lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;$app&#x2F;stores&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;import &lt;&#x2F;span&gt;&lt;span&gt;{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;onMount&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;from &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;#39;svelte&amp;#39;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNote&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteBody&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteTitle&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;slug&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;save&lt;&#x2F;span&gt;&lt;span&gt;(){
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;currentStore &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$myStore&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; get the index of the current note that we&amp;#39;re editing
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;currentStore&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;findIndex&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;item &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;item&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;bson_uuid &lt;&#x2F;span&gt;&lt;span&gt;=== &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;slug&lt;&#x2F;span&gt;&lt;span&gt;); 
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; grab the values for editing
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedObject &lt;&#x2F;span&gt;&lt;span&gt;= {...&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;currentStore&lt;&#x2F;span&gt;&lt;span&gt;[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index&lt;&#x2F;span&gt;&lt;span&gt;]};
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; edit the values with what&amp;#39;s in the textareas
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedObject&lt;&#x2F;span&gt;&lt;span&gt;.title = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteTitle&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedObject&lt;&#x2F;span&gt;&lt;span&gt;.body = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteBody&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; update the store
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;myStore&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;update&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;store &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedStore &lt;&#x2F;span&gt;&lt;span&gt;= [...&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;store&lt;&#x2F;span&gt;&lt;span&gt;];
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedStore&lt;&#x2F;span&gt;&lt;span&gt;[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index&lt;&#x2F;span&gt;&lt;span&gt;] = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedObject&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;updatedStore&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;		});
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; save to disk
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;editStore&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$myStore&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;	}
&lt;&#x2F;span&gt;&lt;span&gt;	
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; deletes this note 
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;function &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;del&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; filter out this note in myStore
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;myStore&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;update&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;objects &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;objects&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;filter&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;obj &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;obj&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;bson_uuid &lt;&#x2F;span&gt;&lt;span&gt;!== &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;slug&lt;&#x2F;span&gt;&lt;span&gt;));
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; give the updated store to the backend
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;editStore&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$myStore&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; redirect to &#x2F;
&lt;&#x2F;span&gt;&lt;span&gt;		window.location.href=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;	}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; check the slug to match a UUID in myStore
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;onMount&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;async &lt;&#x2F;span&gt;&lt;span&gt;() &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;slug &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$page&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;params&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;slug&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;toString&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$myStore&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;forEach&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;element &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;=&amp;gt; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if &lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;element&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;bson_uuid &lt;&#x2F;span&gt;&lt;span&gt;=== &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;slug&lt;&#x2F;span&gt;&lt;span&gt;) {
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; grab the values and render them to the DOM
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNote &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;element&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteTitle &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;element&lt;&#x2F;span&gt;&lt;span&gt;.title;
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteBody &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;element&lt;&#x2F;span&gt;&lt;span&gt;.body;
&lt;&#x2F;span&gt;&lt;span&gt;				&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;			}
&lt;&#x2F;span&gt;&lt;span&gt;		});
&lt;&#x2F;span&gt;&lt;span&gt;	});
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;script&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div id &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;new-note&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;h1&amp;gt; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Edit note &lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;h1&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;a href&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;home-button&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;BACK&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button &lt;&#x2F;span&gt;&lt;span&gt;on:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;click&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;save&lt;&#x2F;span&gt;&lt;span&gt;}&amp;gt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Save&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button &lt;&#x2F;span&gt;&lt;span&gt;on:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;click&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;del&lt;&#x2F;span&gt;&lt;span&gt;}&amp;gt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;Delete&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;button&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea &lt;&#x2F;span&gt;&lt;span&gt;bind:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;value&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteTitle&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;edit-note-title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;textarea&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;textarea &lt;&#x2F;span&gt;&lt;span&gt;bind:&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;value&lt;&#x2F;span&gt;&lt;span&gt;={&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;oneNoteBody&lt;&#x2F;span&gt;&lt;span&gt;} &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;edit-note-box&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;textarea&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;done&quot;&gt;Done&lt;&#x2F;h2&gt;
&lt;p&gt;Running the following command will build the app into a binary located at
&lt;code&gt;src-tauri&#x2F;target&#x2F;release&#x2F;&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;pnpm&lt;&#x2F;span&gt;&lt;span&gt; tauri build
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;My binary says it&#x27;s at 10M, but I get it down to 3.0M by using &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;upx.github.io&#x2F;&quot;&gt;UPX&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;$&lt;&#x2F;span&gt;&lt;span&gt; upx notes
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;For cross platform compilation check out the official Tauri &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;tauri.app&#x2F;v1&#x2F;guides&#x2F;building&#x2F;cross-platform&#x2F;&quot;&gt;docs&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;p&gt;Here is the complete code on &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;github.com&#x2F;spacedimp&#x2F;tauri-note-taking-app&quot;&gt;Github&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;h3 id=&quot;final-notes&quot;&gt;Final notes&lt;&#x2F;h3&gt;
&lt;p&gt;My initial goal was to have drag and drop functionality of images or videos. This would have made this tutorial way longer which is not my goal.&lt;&#x2F;p&gt;
&lt;p&gt;I chose to store the data as bson (binary JSON) as I was planning to store the images&#x2F;videos as blobs. I&#x27;m not sure that this would even work as MongoDB&#x27;s &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;www.mongodb.com&#x2F;docs&#x2F;manual&#x2F;reference&#x2F;limits&#x2F;&quot;&gt;docs&lt;&#x2F;a&gt; mention that a bson document can only store 16MB. I guess something like IndexedDB would serve my goals better.&lt;&#x2F;p&gt;
</content>
        
    </entry>
    <entry xml:lang="en">
        <title>Security Hardening Linux OS</title>
        <published>2023-03-14T00:00:00+00:00</published>
        <updated>2023-03-14T00:00:00+00:00</updated>
        
        <author>
          <name>
            
              Unknown
            
          </name>
        </author>
        
        <link rel="alternate" type="text/html" href="https://spacedimp.com/blog/security-hardening-linux-os/"/>
        <id>https://spacedimp.com/blog/security-hardening-linux-os/</id>
        
        <content type="html" xml:base="https://spacedimp.com/blog/security-hardening-linux-os/">&lt;h2 id=&quot;these-are-some-extra-steps-that-you-can-implement-to-harden-a-linux-system&quot;&gt;These are some extra steps that you can implement to harden a Linux system.&lt;&#x2F;h2&gt;
&lt;hr &#x2F;&gt;
&lt;br&gt;
&lt;h3 id=&quot;usbguard-prevents-unauthorized-usb-devices-from-connecting&quot;&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;usbguard.github.io&#x2F;&quot;&gt;USBGuard&lt;&#x2F;a&gt; prevents unauthorized USB devices from connecting.&lt;&#x2F;h3&gt;
&lt;p&gt;The &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;usbguard.github.io&#x2F;documentation&#x2F;compilation.html&quot;&gt;installation&lt;&#x2F;a&gt; page goes through the process of setting it up.&lt;&#x2F;p&gt;
&lt;p&gt;For Fedora users it&#x27;s as simple as:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; dnf install usbguard
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Make sure any USB you want to allow through is connected to a port.
Then generate an initial ruleset:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# You might need to switch to root to run this 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; usbguard generate-policy &amp;gt; &#x2F;etc&#x2F;usbguard&#x2F;rules.conf
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Enable the service on startup:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; systemctl start usbguard
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; systemctl enable usbguard
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Allowing a new USB device is as simple as:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# Plug in a new device and find it using
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; usbguard list-devices
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;New devices should be automatically blocked and appear as&lt;&#x2F;p&gt;
&lt;blockquote&gt;
&lt;p&gt;22: block id 08...&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;p&gt;To allow the device simply run:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# Note that this won&amp;#39;t make it permanent.
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; usbguard allow-device 22 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;To allow the device permanently run:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; usbguard allow-device 22&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -p
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h3 id=&quot;nts-over-ntp&quot;&gt;NTS over NTP&lt;&#x2F;h3&gt;
&lt;p&gt;Network Time Protocol allows your device to synchronize its time with highly accurate atomic clock servers. However,
it&#x27;s very old and abused for DDoS &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;www.cloudflare.com&#x2F;learning&#x2F;ddos&#x2F;ntp-amplification-ddos-attack&#x2F;&quot;&gt;amplification&lt;&#x2F;a&gt; attacks.&lt;&#x2F;p&gt;
&lt;p&gt;NTS extends NTP by adding encrypted cookies that authenticate that the time data has not been tampered with.
This cookie is recomputed every exchange of client&#x2F;server to prevent linkability.&lt;&#x2F;p&gt;
&lt;p&gt;NTS also provides a unique identifier to detect spoofed packets.&lt;&#x2F;p&gt;
&lt;p&gt;As well as an AHEAD algorithm used to encrypt the cookie.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;datatracker.ietf.org&#x2F;doc&#x2F;html&#x2F;draft-ietf-ntp-using-nts-for-ntp-19?ref=dans-notes&quot;&gt;Here&#x27;s&lt;&#x2F;a&gt; the full draft.&lt;&#x2F;p&gt;
&lt;p&gt;Chrony can be easily configured for NTS as follows:&lt;&#x2F;p&gt;
&lt;p&gt;Edit &lt;code&gt;&#x2F;etc&#x2F;chrony.conf&lt;&#x2F;code&gt; (make sure it&#x27;s installed first)&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# List of NTS servers:
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;server&lt;&#x2F;span&gt;&lt;span&gt; nts.netnod.se       iburst nts
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;server&lt;&#x2F;span&gt;&lt;span&gt; nts.time.nl         iburst nts
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;server&lt;&#x2F;span&gt;&lt;span&gt; ptbtime1.ptb.de     iburst nts
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;server&lt;&#x2F;span&gt;&lt;span&gt; ptbtime2.ptb.de     iburst nts
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;server&lt;&#x2F;span&gt;&lt;span&gt; ptbtime3.ptb.de     iburst nts
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# NTS cookie jar to minimise NTS-KE requests upon chronyd restart
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;ntsdumpdir&lt;&#x2F;span&gt;&lt;span&gt; &#x2F;var&#x2F;lib&#x2F;chrony
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;then restart chrony&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; systemctl restart chronyd
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h3 id=&quot;icmp-tunneling&quot;&gt;ICMP tunneling&lt;&#x2F;h3&gt;
&lt;p&gt;ICMP is another protocol that can be abused by an attacker to exfiltrate
private data. It can also be abused as a DDoS attack.&lt;&#x2F;p&gt;
&lt;p&gt;In Fedora ICMP&#x27;s echo request&#x2F; echo reply can be disabled with the firwall:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# first check if they&amp;#39;re already disabled 
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;firewall-cmd --query-icmp-block&lt;&#x2F;span&gt;&lt;span&gt;=echo-request
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;firewall-cmd --query-icmp-block&lt;&#x2F;span&gt;&lt;span&gt;=echo-reply
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# if they both say not then disable them
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; firewall-cmd&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --add-icmp-block&lt;&#x2F;span&gt;&lt;span&gt;=echo-request
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; firewall-cmd&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --add-icmp-block&lt;&#x2F;span&gt;&lt;span&gt;=echo-reply
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;I won&#x27;t cover firewalls in this small guide as they should each be configured
to the user&#x27;s needs as well as the specific OS.&lt;&#x2F;p&gt;
&lt;p&gt;Blocking ICMP pings is generally seen as bad practice. Better would be using
whitelist filters in the firewall, instead of blocking them all.&lt;&#x2F;p&gt;
&lt;h3 id=&quot;hardening-the-kernel&quot;&gt;Hardening the Kernel&lt;&#x2F;h3&gt;
&lt;p&gt;The simplest way to pass arguments to the kernel is with sysctl.&lt;&#x2F;p&gt;
&lt;p&gt;Simply edit &lt;code&gt;&#x2F;etc&#x2F;sysctl.conf&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# blocks kernel pointers from being exposed to an attacker
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.kptr_restrict&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;2
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;vm.mmap_rnd_bits&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;32
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;vm.mmap_rnd_compat_bits&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;16
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# avoid kernel memory address exposures
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.dmesg_restrict&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;1
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# disallow kernel&#x2F;cpu profiling from non root
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.dmesg_restrict&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;1
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.perf_event_paranoid&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;3
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# disallow kernel swapping while running
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.kexec_load_disabled&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;1
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# Avoid non-ancestor ptrace access to running processes and their credentials.
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.yama.ptrace_scope&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;1
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# Disable User Namespaces, as it opens up a large attack surface to unprivileged users.
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;user.max_user_namespaces&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;0
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# Turn off unprivileged eBPF access.
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;kernel.unprivileged_bpf_disabled&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;1
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;# harden BPF JIT
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;net.core.bpf_jit_harden&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;2
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Then make the changes without rebooting:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; sysctl&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -p&lt;&#x2F;span&gt;&lt;span&gt; &#x2F;etc&#x2F;sysctl.conf
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;More hardening parameters can be found &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;madaidans-insecurities.github.io&#x2F;guides&#x2F;linux-hardening.html&quot;&gt;here&lt;&#x2F;a&gt;
and also &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;wiki.archlinux.org&#x2F;title&#x2F;Sysctl&quot;&gt;here&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
</content>
        
    </entry>
    <entry xml:lang="en">
        <title>Using Rust, Axum, PostgreSQL, and Tokio to build a Blog</title>
        <published>2023-03-11T00:00:00+00:00</published>
        <updated>2023-03-11T00:00:00+00:00</updated>
        
        <author>
          <name>
            
              Unknown
            
          </name>
        </author>
        
        <link rel="alternate" type="text/html" href="https://spacedimp.com/blog/using-rust-axum-postgresql-and-tokio-to-build-a-blog/"/>
        <id>https://spacedimp.com/blog/using-rust-axum-postgresql-and-tokio-to-build-a-blog/</id>
        
        <content type="html" xml:base="https://spacedimp.com/blog/using-rust-axum-postgresql-and-tokio-to-build-a-blog/">&lt;h3 id=&quot;in-this-demonstration-we-ll-be-using-axum-to-make-a-very-minimal-blog&quot;&gt;In this demonstration, we&#x27;ll be using Axum to make a very minimal blog.&lt;&#x2F;h3&gt;
&lt;h3 id=&quot;storing-the-blogs-written-in-markdown-into-postgresql-and-lastly-using-askama-to-render-those-blog-posts&quot;&gt;Storing the blogs written in markdown into PostgreSQL, and lastly using Askama to render those blog posts.&lt;&#x2F;h3&gt;
&lt;p&gt;&lt;img src=&quot;&#x2F;img&#x2F;gif&#x2F;blog_demo.gif&quot; alt=&quot;Alt text&quot; title=&quot;demo of Rust, Axum, Tokio, PostgreSQL blog&quot; &#x2F;&gt;&lt;&#x2F;p&gt;
&lt;hr &#x2F;&gt;
&lt;h2 id=&quot;setup-up-a-new-project&quot;&gt;Setup up a new project&lt;&#x2F;h2&gt;
&lt;p&gt;Create a Rust binary (--bin is default and we could omit)&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; new blog-rs&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bin
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Add the following modules in &lt;code&gt;Cargo.toml&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;toml&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-toml &quot;&gt;&lt;code class=&quot;language-toml&quot; data-lang=&quot;toml&quot;&gt;&lt;span&gt;[package]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;blog-rs&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.1.0&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;edition &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;2021&amp;quot;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;[dependencies]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio &lt;&#x2F;span&gt;&lt;span&gt;= {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;1.28.0&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;features &lt;&#x2F;span&gt;&lt;span&gt;= [&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;macros&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;rt-multi-thread&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;]}
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;axum &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.6.17&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;askama &lt;&#x2F;span&gt;&lt;span&gt;= {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.12.0&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;features&lt;&#x2F;span&gt;&lt;span&gt;=[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;markdown&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;]}
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sqlx &lt;&#x2F;span&gt;&lt;span&gt;= {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.6.3&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;features &lt;&#x2F;span&gt;&lt;span&gt;= [&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;runtime-tokio-rustls&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;postgres&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;macros&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;time&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;]}&lt;&#x2F;span&gt;&lt;span style=&quot;background-color:#f2777a;color:#272b33;&quot;&gt; &lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tower-http &lt;&#x2F;span&gt;&lt;span&gt;= {&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;version &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.4&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;features &lt;&#x2F;span&gt;&lt;span&gt;= [&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;full&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;]}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Edit &lt;code&gt;main.rs&lt;&#x2F;code&gt; and create a server at localhost:4000&#x2F;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rs&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rs &quot;&gt;&lt;code class=&quot;language-rs&quot; data-lang=&quot;rs&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::{http::StatusCode, response::IntoResponse};
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::{routing::get, Router};
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;tokio::net::TcpListener;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;index&lt;&#x2F;span&gt;&lt;span&gt;() -&amp;gt; impl IntoResponse {
&lt;&#x2F;span&gt;&lt;span&gt;    (StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;OK&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Homepage&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app = Router::new().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(index));
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; listener = TcpListener::bind(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.0.0.0:4000&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).await.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    axum::serve(listener, app).await.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Spin up the server with:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; run main.rs
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;br&gt;
&lt;h2 id=&quot;a-brief-introduction-to-tokio-and-axum&quot;&gt;A brief introduction to Tokio and Axum&lt;&#x2F;h2&gt;
&lt;p&gt;Let&#x27;s unpack Axum and Tokio a bit.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;axum&#x2F;latest&#x2F;axum&#x2F;&quot;&gt;Axum&lt;&#x2F;a&gt; is a web framework built with Tokio, Hyper, and Tower.&lt;&#x2F;p&gt;
&lt;br&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tokio&#x2F;latest&#x2F;tokio&#x2F;&quot;&gt;Tokio&lt;&#x2F;a&gt; allows us to run asynchronous non-blocking code (but it can also run blocking code if needed). Its componets include:&lt;&#x2F;p&gt;
&lt;ul&gt;
&lt;li&gt;A scheduler that manages tasks pushed onto a run queue.&lt;&#x2F;li&gt;
&lt;li&gt;An async I&#x2F;O driver that enables using &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tokio&#x2F;latest&#x2F;tokio&#x2F;net&#x2F;index.html&quot;&gt;net&lt;&#x2F;a&gt;, &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tokio&#x2F;latest&#x2F;tokio&#x2F;process&#x2F;index.html&quot;&gt;process&lt;&#x2F;a&gt;, &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tokio&#x2F;latest&#x2F;tokio&#x2F;signal&#x2F;index.html&quot;&gt;signal&lt;&#x2F;a&gt;.&lt;&#x2F;li&gt;
&lt;li&gt;A time driver that enables using &lt;code&gt;tokio::time&lt;&#x2F;code&gt; on the runtime.&lt;&#x2F;li&gt;
&lt;li&gt;Core threads that should have no blocking code and &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tokio&#x2F;latest&#x2F;tokio&#x2F;task&#x2F;fn.spawn_blocking.html&quot;&gt;blocking&lt;&#x2F;a&gt; threads that can be spawned on demand to handle any blocking code.&lt;&#x2F;li&gt;
&lt;&#x2F;ul&gt;
&lt;br&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;spawn&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; code here should never block
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; unless in a closure and passed to tokio::task::spawn_blocking()
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;This is the equivalent of&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;	tokio::runtime::Builder::new_multi_thread()
&lt;&#x2F;span&gt;&lt;span&gt;		.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;enable_all&lt;&#x2F;span&gt;&lt;span&gt;()
&lt;&#x2F;span&gt;&lt;span&gt;		.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;build&lt;&#x2F;span&gt;&lt;span&gt;()
&lt;&#x2F;span&gt;&lt;span&gt;		.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;()
&lt;&#x2F;span&gt;&lt;span&gt;		.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;block_on&lt;&#x2F;span&gt;&lt;span&gt;(async {
&lt;&#x2F;span&gt;&lt;span&gt;			&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Runtime&amp;#39;s entry point
&lt;&#x2F;span&gt;&lt;span&gt;		})
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Axum&#x27;s &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;axum&#x2F;latest&#x2F;axum&#x2F;struct.Router.html&quot;&gt;Router&lt;&#x2F;a&gt; matches a path to handler.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app = Router::new()
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(index));
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Handlers can accept zero or more &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;axum&#x2F;latest&#x2F;axum&#x2F;extract&#x2F;index.html&quot;&gt;extractors&lt;&#x2F;a&gt; as arguments.&lt;&#x2F;p&gt;
&lt;p&gt;As the name suggests they extract request data (like path parameters, query strings, JSON bodies, headers, etc.) and pass them as arguments to your handlers.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;greet&lt;&#x2F;span&gt;&lt;span&gt;(Path(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name&lt;&#x2F;span&gt;&lt;span&gt;): Path&amp;lt;String&amp;gt;) -&amp;gt; String {
&lt;&#x2F;span&gt;&lt;span&gt;	format!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Hello, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, name)
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;The ordering of the extractors is important as only one extractor can consume the request&#x27;s body. It should be placed as the last argument furthest to the right in your handler.&lt;&#x2F;p&gt;
&lt;p&gt;Anything that implements the IntoResponse trait can be returned by handlers. Axum takes care of implementing it for common types.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;index&lt;&#x2F;span&gt;&lt;span&gt;() -&amp;gt; String {
&lt;&#x2F;span&gt;&lt;span&gt;    String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;homepage&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;) 
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;configuring-the-database&quot;&gt;Configuring the database&lt;&#x2F;h2&gt;
&lt;p&gt;Let&#x27;s get our database up and running. First make sure to &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;www.postgresql.org&#x2F;download&#x2F;&quot;&gt;download&lt;&#x2F;a&gt; and install PostgreSQL.&lt;&#x2F;p&gt;
&lt;p&gt;Make sure the service is started (I&#x27;m running linux so here&#x27;s how I&#x27;d do it)&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; systemctl start postgresql
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Login using psql&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo -u&lt;&#x2F;span&gt;&lt;span&gt; postgres psql 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Setup a user and database (inside of psql run the following commands with your own username and password)&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;CREATE USER &lt;&#x2F;span&gt;&lt;span&gt;myuser WITH PASSWORD &amp;#39;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;mypass&lt;&#x2F;span&gt;&lt;span&gt;&amp;#39;;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;CREATE DATABASE &lt;&#x2F;span&gt;&lt;span&gt;mydb OWNER &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;myuser&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Login with the new user and type in your password when prompted. In my case &quot;mypass&quot;.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;psql -h&lt;&#x2F;span&gt;&lt;span&gt; localhost&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -d&lt;&#x2F;span&gt;&lt;span&gt; mydb&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; -U&lt;&#x2F;span&gt;&lt;span&gt; myuser
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;blockquote&gt;
&lt;p&gt;If you get the error: Ident authentication failed for user &quot;myuser&quot;&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;blockquote&gt;
&lt;p&gt;You&#x27;ll need to change your pg_hba.conf from ident to md5&lt;&#x2F;p&gt;
&lt;&#x2F;blockquote&gt;
&lt;p&gt;Edit pg_hba.conf&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;sudo&lt;&#x2F;span&gt;&lt;span&gt; vi &#x2F;var&#x2F;lib&#x2F;pgsql&#x2F;data&#x2F;pg_hba.conf
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Look for these lines&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;conf&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-conf &quot;&gt;&lt;code class=&quot;language-conf&quot; data-lang=&quot;conf&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;local	&lt;&#x2F;span&gt;&lt;span&gt;all	all	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;127.0.0.1&#x2F;32&lt;&#x2F;span&gt;&lt;span&gt;	ident
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;host	&lt;&#x2F;span&gt;&lt;span&gt;all	all	::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;128&lt;&#x2F;span&gt;&lt;span&gt;		ident
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;change to&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;conf&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-conf &quot;&gt;&lt;code class=&quot;language-conf&quot; data-lang=&quot;conf&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;local	&lt;&#x2F;span&gt;&lt;span&gt;all	all	&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;127.0.0.1&#x2F;32&lt;&#x2F;span&gt;&lt;span&gt;	md5
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;host	&lt;&#x2F;span&gt;&lt;span&gt;all	all	::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;128&lt;&#x2F;span&gt;&lt;span&gt;		md5
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Create a table that will store our blog posts.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;sql&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-sql &quot;&gt;&lt;code class=&quot;language-sql&quot; data-lang=&quot;sql&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;CREATE TABLE &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;myposts&lt;&#x2F;span&gt;&lt;span&gt;(
&lt;&#x2F;span&gt;&lt;span&gt;post_id &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;SERIAL PRIMARY KEY&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;post_date &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;DATE &lt;&#x2F;span&gt;&lt;span&gt;NOT &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;NULL &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;DEFAULT &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;CURRENT_DATE&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;post_title &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;TEXT&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;post_body &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;TEXT	
&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Great! Personally, I enjoy creating blog posts in &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.github.com&#x2F;en&#x2F;get-started&#x2F;writing-on-github&#x2F;getting-started-with-writing-and-formatting-on-github&#x2F;basic-writing-and-formatting-syntax&quot;&gt;markdown&lt;&#x2F;a&gt; format. For my editor I use &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;ghostwriter.kde.org&#x2F;&quot;&gt;Ghostwriter&lt;&#x2F;a&gt;.&lt;&#x2F;p&gt;
&lt;p&gt;I say this because I&#x27;ll be storing raw markdown into the field labeled post_body.&lt;&#x2F;p&gt;
&lt;p&gt;We can now connect our app to PostgreSQL&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::postgres::PgPoolOptions;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::FromRow;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::types::time::Date;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::sync::Arc;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; the fields we&amp;#39;ll be retrieving from an sql query
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(FromRow, Debug, Clone)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;Post {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_title&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_date&lt;&#x2F;span&gt;&lt;span&gt;: Date,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_body&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; pool = PgPoolOptions::new()
&lt;&#x2F;span&gt;&lt;span&gt;                .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;max_connections&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;5&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;                &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; use your own credentials
&lt;&#x2F;span&gt;&lt;span&gt;                .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;connect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;postgres:&#x2F;&#x2F;myuser:mypass@localhost&#x2F;mydb&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;                .await
&lt;&#x2F;span&gt;&lt;span&gt;                .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;expect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;couldn&amp;#39;t connect to the database&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; I fetch all of the posts at the start of the program 
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; to avoid hitting the db for each page request
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; posts = sqlx::query_as::&amp;lt;_, Post&amp;gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;select post_title, post_date, post_body from myposts&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;) 
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;fetch_all&lt;&#x2F;span&gt;&lt;span&gt;(&amp;amp;pool)
&lt;&#x2F;span&gt;&lt;span&gt;        .await
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Above we retrieved Vec&amp;lt;Post&amp;gt; 
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; We place it in an Arc for thread-safe referencing.  
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; shared_state = Arc::new(posts);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app = Router::new()
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(index))
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;post&#x2F;:query_title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(post))
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; We pass the shared state to our handlers 
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;with_state&lt;&#x2F;span&gt;&lt;span&gt;(shared_state);
&lt;&#x2F;span&gt;&lt;span&gt;        
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;inserting-markdown-into-the-database&quot;&gt;Inserting markdown into the database&lt;&#x2F;h2&gt;
&lt;p&gt;I suggest creating a new binary where we simply pass it a title and a markdown file as arguments.&lt;&#x2F;p&gt;
&lt;p&gt;Edit Cargo.toml to include a second binary that will insert a markdown file into the database&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;toml&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-toml &quot;&gt;&lt;code class=&quot;language-toml&quot; data-lang=&quot;toml&quot;&gt;&lt;span&gt;[[bin]]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;blog-rs&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;path &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;src&#x2F;main.rs&amp;quot;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;[[bin]]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;name &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;markd&amp;quot;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;path &lt;&#x2F;span&gt;&lt;span&gt;= &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;src&#x2F;bin&#x2F;markd.rs&amp;quot;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Create a markdown file inside of src&#x2F;bin&#x2F;post.md with content of your choosing. Here&#x27;s mine:&lt;&#x2F;p&gt;
&lt;p&gt;src&#x2F;bin&#x2F;post.md&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;md&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-md &quot;&gt;&lt;code class=&quot;language-md&quot; data-lang=&quot;md&quot;&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;# This is a post 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;with some content 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Markd is very rudimentary.&lt;&#x2F;p&gt;
&lt;p&gt;It lacks any capabilities besides inserting a single file into our database.&lt;&#x2F;p&gt;
&lt;p&gt;Create src&#x2F;bin&#x2F;markd.rs&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::env;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::postgres::PgPoolOptions;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::fs::File;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::io::Read;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() -&amp;gt; Result&amp;lt;(), sqlx::Error&amp;gt;{
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; collects the arguments when we run:
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; cargo run --bin markd &amp;quot;A title&amp;quot; .&#x2F;post.md
&lt;&#x2F;span&gt;&lt;span&gt;	
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; args: Vec&amp;lt;String&amp;gt; = env::args().&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;collect&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; inserter;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; argument 2 should contain the file name
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match &lt;&#x2F;span&gt;&lt;span&gt;File::open(&amp;amp;args[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;2&lt;&#x2F;span&gt;&lt;span&gt;]) {
&lt;&#x2F;span&gt;&lt;span&gt;        Ok(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; file) =&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; content = String::new();
&lt;&#x2F;span&gt;&lt;span&gt;            file.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;read_to_string&lt;&#x2F;span&gt;&lt;span&gt;(&amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; content).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;            inserter = content;
&lt;&#x2F;span&gt;&lt;span&gt;        },
&lt;&#x2F;span&gt;&lt;span&gt;        Err(error) =&amp;gt; {panic!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;could not insert into postgres&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)},
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; pool = PgPoolOptions::new()
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;max_connections&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;3&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; use your own credentials below
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;connect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;postgres:&#x2F;&#x2F;myuser:mypass@localhost&#x2F;mydb&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;        .await
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;expect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;couldn&amp;#39;t create pool&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; insert the title and file contents into the database
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; row: (&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;i64&lt;&#x2F;span&gt;&lt;span&gt;,) = sqlx::query_as(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;insert into myposts (post_title, post_body) values ($1, $2) returning post_id&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;bind&lt;&#x2F;span&gt;&lt;span&gt;(&amp;amp;args[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;1&lt;&#x2F;span&gt;&lt;span&gt;])
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;bind&lt;&#x2F;span&gt;&lt;span&gt;(inserter)
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;fetch_one&lt;&#x2F;span&gt;&lt;span&gt;(&amp;amp;pool)
&lt;&#x2F;span&gt;&lt;span&gt;        .await?;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    Ok(())
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We can now use this separate binary to insert our posts into the database using the following command:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bin&lt;&#x2F;span&gt;&lt;span&gt; markd &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;My post&amp;#39;s title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt; .&#x2F;src&#x2F;bin&#x2F;post.md
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Of course you&#x27;d give a different title for each new post.&lt;&#x2F;p&gt;
&lt;h2 id=&quot;using-askama-to-render-markdown-into-templates&quot;&gt;Using Askama to render markdown into templates&lt;&#x2F;h2&gt;
&lt;p&gt;So far so good. How about we add &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;github.com&#x2F;djc&#x2F;askama&quot;&gt;Askama&lt;&#x2F;a&gt; template engine to render our markdown posts into html.&lt;&#x2F;p&gt;
&lt;p&gt;edit &lt;code&gt;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;askama::Template;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Each post template will be populated with the values 
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; located in the shared state of the handlers. 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Template)]
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;template&lt;&#x2F;span&gt;&lt;span&gt;(path = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;posts.html&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;PostTemplate&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_title&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a str&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_date&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_body&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a str&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Askama looks for templates outside of the src folder. Create a folder called templates in the same spot that your Cargo.toml resides.&lt;&#x2F;p&gt;
&lt;p&gt;We should also make a base template that our post template can extend from.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;templates&#x2F;base.html&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;html&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-html &quot;&gt;&lt;code class=&quot;language-html&quot; data-lang=&quot;html&quot;&gt;&lt;span&gt;&amp;lt;!&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;DOCTYPE &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;html&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;html &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;lang&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;en&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;head&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;{{ post_title }}&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&amp;lt;!-- we&amp;#39;ll use Tower middlewar middleware to serve this static content soon--&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;link &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;href&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;assets&#x2F;post.css&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;rel&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;stylesheet&amp;quot; &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;type&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;text&#x2F;css&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&#x2F;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;head&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;id&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Post&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{% block post %}
&lt;&#x2F;span&gt;&lt;span&gt;		{% endblock post %}
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;html&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;&lt;code&gt;templates&#x2F;posts.html&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;html&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-html &quot;&gt;&lt;code class=&quot;language-html&quot; data-lang=&quot;html&quot;&gt;&lt;span&gt;{% extends &amp;quot;base.html&amp;quot; %}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;{% block post %}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;post_title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{{ post_title }}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;post_date&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{{ post_date }}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;post_body&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{{ post_body|markdown }}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;{% endblock post %}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We need a handler to serve our static CSS. Fortunately, &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tower&#x2F;latest&#x2F;tower&#x2F;&quot;&gt;Tower&lt;&#x2F;a&gt; has middleware we can use including &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;docs.rs&#x2F;tower-http&#x2F;latest&#x2F;tower_http&#x2F;&quot;&gt;tower_http&lt;&#x2F;a&gt; to take care of this.&lt;&#x2F;p&gt;
&lt;p&gt;First create a folder titled &lt;code&gt;assets&lt;&#x2F;code&gt; in the same spot that Cargo.toml resides. Inside of assets create &lt;code&gt;post.css&lt;&#x2F;code&gt; with some CSS.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;assets&#x2F;post.css&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;css&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-css &quot;&gt;&lt;code class=&quot;language-css&quot; data-lang=&quot;css&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;	background: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;#101010&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;#Post &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;	background: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;#D5D9E7&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;edit &lt;code&gt;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;tower_http::services::ServeDir;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; edit the router to serve static content from the assets folder
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app = Router::new()
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(index))
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;post&#x2F;:query_title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(post))
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;with_state&lt;&#x2F;span&gt;&lt;span&gt;(shared_state)
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;nest_service&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;assets&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, ServeDir::new(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;assets&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;));
&lt;&#x2F;span&gt;&lt;span&gt;        
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We now need some logic in the post handler to match the user&#x27;s query to any post with the same title.&lt;&#x2F;p&gt;
&lt;p&gt;edit &lt;code&gt;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; We use two extractors in the arguments
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Path to grab the query and State that has all our posts 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::extract::Path;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::extract::State;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;post&lt;&#x2F;span&gt;&lt;span&gt;(Path(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;query_title&lt;&#x2F;span&gt;&lt;span&gt;): Path&amp;lt;String&amp;gt;, State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;Arc&amp;lt;Vec&amp;lt;Post&amp;gt;&amp;gt;&amp;gt;) -&amp;gt; impl IntoResponse {
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; A default template or else the compiler complains 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; template = PostTemplate{post_title: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, post_date: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;(), post_body: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;};
&lt;&#x2F;span&gt;&lt;span&gt;    
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; We look for any post with the same title as the user&amp;#39;s query
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for&lt;&#x2F;span&gt;&lt;span&gt; i in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;..state.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;len&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if&lt;&#x2F;span&gt;&lt;span&gt; query_title == state[i].post_title {
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; We found one so mutate the template variable and
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; populate it with the post that the user requested 
&lt;&#x2F;span&gt;&lt;span&gt;            template = PostTemplate{post_title: &amp;amp;state[i].post_title, 
&lt;&#x2F;span&gt;&lt;span&gt;                       post_date: state[i].post_date.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;(), 
&lt;&#x2F;span&gt;&lt;span&gt;                       post_body: &amp;amp;state[i].post_body
&lt;&#x2F;span&gt;&lt;span&gt;            };
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;break&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;        } &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;else &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;continue
&lt;&#x2F;span&gt;&lt;span&gt;        }
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; 404 if no title found matching the user&amp;#39;s query 
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if &lt;&#x2F;span&gt;&lt;span&gt;&amp;amp;template.post_title == &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span&gt;(StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;NOT_FOUND&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;404 not found&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; render the template into HTML and return it to the user
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match&lt;&#x2F;span&gt;&lt;span&gt; template.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;render&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        Ok(html) =&amp;gt; Html(html).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;        Err(_) =&amp;gt; (StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;INTERNAL_SERVER_ERROR&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;try again later&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;()
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Ok great, but how will the user ever find our posts?&lt;&#x2F;p&gt;
&lt;p&gt;How about sending them a list of links to all our posts.&lt;&#x2F;p&gt;
&lt;p&gt;edit &lt;code&gt;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; create an Axum template for our homepage
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; index_title is the html page&amp;#39;s title 
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; index_links are the titles of the blog posts 
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Template)]
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;template&lt;&#x2F;span&gt;&lt;span&gt;(path = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;index.html&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;IndexTemplate&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index_title&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index_links&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a &lt;&#x2F;span&gt;&lt;span&gt;Vec&amp;lt;String&amp;gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; Then populate the template with all post titles
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;index&lt;&#x2F;span&gt;&lt;span&gt;(State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;Arc&amp;lt;Vec&amp;lt;Post&amp;gt;&amp;gt;&amp;gt;) -&amp;gt; impl IntoResponse{
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; s = state.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;clone&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; plinks: Vec&amp;lt;String&amp;gt; = Vec::new();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for&lt;&#x2F;span&gt;&lt;span&gt; i in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0 &lt;&#x2F;span&gt;&lt;span&gt;.. s.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;len&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        plinks.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;push&lt;&#x2F;span&gt;&lt;span&gt;(s[i].post_title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;clone&lt;&#x2F;span&gt;&lt;span&gt;());
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; template = IndexTemplate{index_title: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;My blog&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;), index_links: &amp;amp;plinks};
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match&lt;&#x2F;span&gt;&lt;span&gt; template.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;render&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;            Ok(html) =&amp;gt; Html(html).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;         Err(err) =&amp;gt; (
&lt;&#x2F;span&gt;&lt;span&gt;                StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;INTERNAL_SERVER_ERROR&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;                format!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Failed to render template. Error &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, err),
&lt;&#x2F;span&gt;&lt;span&gt;            ).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Index template will loop through our Vec of titles and render them as anchor links.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;templates&#x2F;index.html&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;html&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-html &quot;&gt;&lt;code class=&quot;language-html&quot; data-lang=&quot;html&quot;&gt;&lt;span&gt;&amp;lt;!&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;DOCTYPE &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;html&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; 
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;html&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;head&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; 
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {{ index_title }} &amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;head&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;links&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;			&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;ul&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;			{% for item in index_links %}
&lt;&#x2F;span&gt;&lt;span&gt;				&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;li&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;a &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;href&lt;&#x2F;span&gt;&lt;span&gt;=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;post&#x2F;{{ item }}&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;{{ item }}&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;li&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;			{% endfor %}
&lt;&#x2F;span&gt;&lt;span&gt;		   &amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;ul&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;body&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;html&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Remember to insert your markdown into the database with this command&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bin&lt;&#x2F;span&gt;&lt;span&gt; markd &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Some title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt; .&#x2F;post.md
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;And now we run the server&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; run&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --bin&lt;&#x2F;span&gt;&lt;span&gt; blog-rs 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;We&#x27;re pretty much done, but I want to demonstrate how to create a custom Askama filter.&lt;&#x2F;p&gt;
&lt;p&gt;I&#x27;ll be adding dashes to the titles to make them more URL friendly.&lt;&#x2F;p&gt;
&lt;p&gt;Because this:&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;localhost:4000&#x2F;post&#x2F;Some-Title&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;is more readable than this:&lt;&#x2F;p&gt;
&lt;p&gt;&lt;code&gt;localhost:4000&#x2F;post&#x2F;Some&amp;amp;20Title&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;However, this will also make each post title have dashes. My simple &quot;rmdashes&quot; filter will remove the dashes to make the titles appear more pleasant in the page.&lt;&#x2F;p&gt;
&lt;p&gt;Askama searches for custom filters inside of &lt;code&gt;mod filters {}&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;edit &lt;code&gt;main.rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mod &lt;&#x2F;span&gt;&lt;span&gt;filters {
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; This filter removes the dashes that I will be adding in main() 
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;rmdashes&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;str&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; askama::Result&amp;lt;String&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;       Ok(title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;replace&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;-&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot; &amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into&lt;&#x2F;span&gt;&lt;span&gt;())
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; I replace spaces with dashes so that the title appears
&lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; easier to read in the URL. localhost:4000&#x2F;post&#x2F;a-title
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;   
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for&lt;&#x2F;span&gt;&lt;span&gt; post in &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; posts {
&lt;&#x2F;span&gt;&lt;span&gt;      post.post_title = post.post_title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;replace&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot; &amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;-&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;   }
&lt;&#x2F;span&gt;&lt;span&gt;   
&lt;&#x2F;span&gt;&lt;span&gt;   &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F;
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Now we use the rmdashes filter in &lt;code&gt;posts.html&lt;&#x2F;code&gt; as we don&#x27;t
want the dashes in the web page. Only in the URL.&lt;&#x2F;p&gt;
&lt;p&gt;edit  &lt;code&gt;templates&#x2F;posts.html&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;template&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-template &quot;&gt;&lt;code class=&quot;language-template&quot; data-lang=&quot;template&quot;&gt;&lt;span&gt;{% extends &amp;quot;base.html&amp;quot; %}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;{% block post %}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;post_title&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_title&lt;&#x2F;span&gt;&lt;span&gt;|&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;rmdashes &lt;&#x2F;span&gt;&lt;span&gt;}}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;post_date&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_date &lt;&#x2F;span&gt;&lt;span&gt;}}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;class=&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;post_body&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;		{{ &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_body&lt;&#x2F;span&gt;&lt;span&gt;|&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;markdown &lt;&#x2F;span&gt;&lt;span&gt;}}
&lt;&#x2F;span&gt;&lt;span&gt;	&amp;lt;&#x2F;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;div&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt;
&lt;&#x2F;span&gt;&lt;span&gt;{% endblock post %}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;h2 id=&quot;optimizing-the-final-binary&quot;&gt;Optimizing the final binary&lt;&#x2F;h2&gt;
&lt;p&gt;Use this command to view file sizes, on linux: &lt;code&gt;ls -lh blog-rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;My binary, inside of &lt;code&gt;target&#x2F;debug&#x2F;blog-rs&lt;&#x2F;code&gt; , is at 126M.&lt;&#x2F;p&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;nnethercote.github.io&#x2F;perf-book&#x2F;build-configuration.html&quot;&gt;Here&#x27;s&lt;&#x2F;a&gt; an excellent guide on optimizing your binary.&lt;&#x2F;p&gt;
&lt;p&gt;Building my binary with the --release flag reduces the size to only 13M.&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;cargo&lt;&#x2F;span&gt;&lt;span&gt; build&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt; --release 
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;An optimized binary now resides in &lt;code&gt;target&#x2F;release&#x2F;blog-rs&lt;&#x2F;code&gt;&lt;&#x2F;p&gt;
&lt;p&gt;Want a smaller binary size?&lt;&#x2F;p&gt;
&lt;p&gt;&lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;upx.github.io&#x2F;&quot;&gt;UPX&lt;&#x2F;a&gt; gets my binary down further to 3.9M&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;bash&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-bash &quot;&gt;&lt;code class=&quot;language-bash&quot; data-lang=&quot;bash&quot;&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;upx&lt;&#x2F;span&gt;&lt;span&gt; &#x2F;target&#x2F;release&#x2F;blog-rs
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
&lt;p&gt;Here&#x27;s the full project: &lt;a rel=&quot;noopener&quot; target=&quot;_blank&quot; href=&quot;https:&#x2F;&#x2F;github.com&#x2F;spacedimp&#x2F;rust-blog-example&quot;&gt;https:&#x2F;&#x2F;github.com&#x2F;spacedimp&#x2F;rust-blog-example&lt;&#x2F;a&gt;&lt;&#x2F;p&gt;
&lt;p&gt;And here is the finished main.rs source code for quick reference:&lt;&#x2F;p&gt;
&lt;pre data-lang=&quot;rust&quot; style=&quot;background-color:#282c34;color:#abb2bf;&quot; class=&quot;language-rust &quot;&gt;&lt;code class=&quot;language-rust&quot; data-lang=&quot;rust&quot;&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::{http::StatusCode, response::Html, response::IntoResponse};
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::{routing::get, Router};
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;tokio::net::TcpListener;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::postgres::PgPoolOptions;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::types::time::Date;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;sqlx::FromRow;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::extract::Path;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;axum::extract::State;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;std::sync::Arc;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;askama::Template;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;use &lt;&#x2F;span&gt;&lt;span&gt;tower_http::services::ServeDir;
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Template)]
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;template&lt;&#x2F;span&gt;&lt;span&gt;(path = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;posts.html&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;PostTemplate&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_title&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a str&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_date&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_body&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a str&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(Template)]
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;template&lt;&#x2F;span&gt;&lt;span&gt;(path = &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;index.html&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;IndexTemplate&amp;lt;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a&lt;&#x2F;span&gt;&lt;span&gt;&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index_title&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;index_links&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;&amp;#39;a &lt;&#x2F;span&gt;&lt;span&gt;Vec&amp;lt;String&amp;gt;,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;derive&lt;&#x2F;span&gt;&lt;span&gt;(FromRow, Debug, Clone)]
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub struct &lt;&#x2F;span&gt;&lt;span&gt;Post {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_title&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_date&lt;&#x2F;span&gt;&lt;span&gt;: Date,
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub &lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;post_body&lt;&#x2F;span&gt;&lt;span&gt;: String,
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;post&lt;&#x2F;span&gt;&lt;span&gt;(
&lt;&#x2F;span&gt;&lt;span&gt;    Path(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;query_title&lt;&#x2F;span&gt;&lt;span&gt;): Path&amp;lt;String&amp;gt;,
&lt;&#x2F;span&gt;&lt;span&gt;    State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;Arc&amp;lt;Vec&amp;lt;Post&amp;gt;&amp;gt;&amp;gt;,
&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; impl IntoResponse {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; template = PostTemplate {
&lt;&#x2F;span&gt;&lt;span&gt;        post_title: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;        post_date: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;        post_body: &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;    };
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for&lt;&#x2F;span&gt;&lt;span&gt; i in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;..state.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;len&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if&lt;&#x2F;span&gt;&lt;span&gt; query_title == state[i].post_title {
&lt;&#x2F;span&gt;&lt;span&gt;            template = PostTemplate {
&lt;&#x2F;span&gt;&lt;span&gt;                post_title: &amp;amp;state[i].post_title,
&lt;&#x2F;span&gt;&lt;span&gt;                post_date: state[i].post_date.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;to_string&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;                post_body: &amp;amp;state[i].post_body,
&lt;&#x2F;span&gt;&lt;span&gt;            };
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;break&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;        } &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;else &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;            &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;continue&lt;&#x2F;span&gt;&lt;span&gt;;
&lt;&#x2F;span&gt;&lt;span&gt;        }
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; 404 if no title found matching the user&amp;#39;s query
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;if &lt;&#x2F;span&gt;&lt;span&gt;&amp;amp;template.post_title == &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;none&amp;quot; &lt;&#x2F;span&gt;&lt;span&gt;{
&lt;&#x2F;span&gt;&lt;span&gt;        &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;return &lt;&#x2F;span&gt;&lt;span&gt;(StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;NOT_FOUND&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;404 not found&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; render the template into HTML and return it to the user
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match&lt;&#x2F;span&gt;&lt;span&gt; template.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;render&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        Ok(html) =&amp;gt; Html(html).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;        Err(_) =&amp;gt; (StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;INTERNAL_SERVER_ERROR&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;try again later&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;index&lt;&#x2F;span&gt;&lt;span&gt;(State(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;state&lt;&#x2F;span&gt;&lt;span&gt;): State&amp;lt;Arc&amp;lt;Vec&amp;lt;Post&amp;gt;&amp;gt;&amp;gt;) -&amp;gt; impl IntoResponse {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; s = state.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;clone&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; plinks: Vec&amp;lt;String&amp;gt; = Vec::new();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for&lt;&#x2F;span&gt;&lt;span&gt; i in &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;0&lt;&#x2F;span&gt;&lt;span&gt;..s.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;len&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        plinks.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;push&lt;&#x2F;span&gt;&lt;span&gt;(s[i].post_title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;clone&lt;&#x2F;span&gt;&lt;span&gt;());
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; template = IndexTemplate {
&lt;&#x2F;span&gt;&lt;span&gt;        index_title: String::from(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;My blog&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;),
&lt;&#x2F;span&gt;&lt;span&gt;        index_links: &amp;amp;plinks,
&lt;&#x2F;span&gt;&lt;span&gt;    };
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;match&lt;&#x2F;span&gt;&lt;span&gt; template.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;render&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;        Ok(html) =&amp;gt; Html(html).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;        Err(err) =&amp;gt; (
&lt;&#x2F;span&gt;&lt;span&gt;            StatusCode::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;INTERNAL_SERVER_ERROR&lt;&#x2F;span&gt;&lt;span&gt;,
&lt;&#x2F;span&gt;&lt;span&gt;            format!(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;Failed to render template. Error &lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;{}&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, err),
&lt;&#x2F;span&gt;&lt;span&gt;        )
&lt;&#x2F;span&gt;&lt;span&gt;            .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into_response&lt;&#x2F;span&gt;&lt;span&gt;(),
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mod &lt;&#x2F;span&gt;&lt;span&gt;filters {
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;font-style:italic;color:#5c6370;&quot;&gt;&#x2F;&#x2F; This filter removes the dashes that I will be adding in main()
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;pub fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;rmdashes&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;title&lt;&#x2F;span&gt;&lt;span&gt;: &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;str&lt;&#x2F;span&gt;&lt;span&gt;) -&amp;gt; askama::Result&amp;lt;String&amp;gt; {
&lt;&#x2F;span&gt;&lt;span&gt;        Ok(title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;replace&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;-&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot; &amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;into&lt;&#x2F;span&gt;&lt;span&gt;())
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;#[&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;tokio&lt;&#x2F;span&gt;&lt;span&gt;::&lt;&#x2F;span&gt;&lt;span style=&quot;color:#e06c75;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;]
&lt;&#x2F;span&gt;&lt;span&gt;async &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;fn &lt;&#x2F;span&gt;&lt;span style=&quot;color:#61afef;&quot;&gt;main&lt;&#x2F;span&gt;&lt;span&gt;() {
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; pool = PgPoolOptions::new()
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;max_connections&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#d19a66;&quot;&gt;5&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;connect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;postgres:&#x2F;&#x2F;myuser:mypass@localhost&#x2F;mydb&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;        .await
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;expect&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;couldn&amp;#39;t connect to the database&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let mut&lt;&#x2F;span&gt;&lt;span&gt; posts =
&lt;&#x2F;span&gt;&lt;span&gt;        sqlx::query_as::&amp;lt;_, Post&amp;gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;SELECT post_title, post_date, post_body FROM myposts&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;)
&lt;&#x2F;span&gt;&lt;span&gt;            .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;fetch_all&lt;&#x2F;span&gt;&lt;span&gt;(&amp;amp;pool)
&lt;&#x2F;span&gt;&lt;span&gt;            .await
&lt;&#x2F;span&gt;&lt;span&gt;            .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;for&lt;&#x2F;span&gt;&lt;span&gt; post in &amp;amp;&lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;mut&lt;&#x2F;span&gt;&lt;span&gt; posts {
&lt;&#x2F;span&gt;&lt;span&gt;        post.post_title = post.post_title.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;replace&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot; &amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;-&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;);
&lt;&#x2F;span&gt;&lt;span&gt;    }
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; shared_state = Arc::new(posts);
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; app = Router::new()
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(index))
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;route&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;post&#x2F;{query_title}&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, &lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;get&lt;&#x2F;span&gt;&lt;span&gt;(post))
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;with_state&lt;&#x2F;span&gt;&lt;span&gt;(shared_state)
&lt;&#x2F;span&gt;&lt;span&gt;        .&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;nest_service&lt;&#x2F;span&gt;&lt;span&gt;(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;&#x2F;assets&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;, ServeDir::new(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;assets&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;));
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    &lt;&#x2F;span&gt;&lt;span style=&quot;color:#c678dd;&quot;&gt;let&lt;&#x2F;span&gt;&lt;span&gt; listener = TcpListener::bind(&lt;&#x2F;span&gt;&lt;span style=&quot;color:#98c379;&quot;&gt;&amp;quot;0.0.0.0:4000&amp;quot;&lt;&#x2F;span&gt;&lt;span&gt;).await.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;
&lt;&#x2F;span&gt;&lt;span&gt;    axum::serve(listener, app).await.&lt;&#x2F;span&gt;&lt;span style=&quot;color:#56b6c2;&quot;&gt;unwrap&lt;&#x2F;span&gt;&lt;span&gt;();
&lt;&#x2F;span&gt;&lt;span&gt;}
&lt;&#x2F;span&gt;&lt;&#x2F;code&gt;&lt;&#x2F;pre&gt;
</content>
        
    </entry>
</feed>