INVERTED INDEX API

Elasticsearch uses a structure called an inverted index, which is designed to allow very fast full-text searches. An inverted index consists of a list of all the unique words that appear in any document, and for each word, a list of the documents in which it appears.

For example, let’s say we have two documents, each with a content field containing the following:

The quick brown fox jumped over the lazy dog
Quick brown foxes leap over lazy dogs in summer

To create an inverted index, we first split the content field of each document into separate words (which we call terms, or tokens), create a sorted list of all the unique terms, and then list in which document each term appears.

End Point

• /api/create Use this to upload Json file and generate your index or indices for multiple file upload
• /api/search Use this to search the created indices

Installation

• Clone this repository locally by opening your terminal and type git clone https://github.com/cwizard2011/inverted-index-api and press enter to clone this repo locally.
• type "npm install" to install all the dependencies in your terminal.

How to run this API

• Create a ".env" file in the root directory of your repository and set PORT = < port of your choice >
• In your terminal, type npm start to start the server
• launch the postman and create a post request, using localhost:(port)/api/create, in the body section, set key to file choose File in the option and upload your JSON files, click SEND to create your indices.
• To search for already created indices, using localhost:(port)/api/search, in the body section, set key to terms, choose x-www-form-urlencoded and set value to the term you want to search for in the uploaded book.

NOTE: This API does not persist data, once you restart the server, the data get losts