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🔒 Security Fix: 4 vulnerabilities addressed #5

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🔒 Security Fix: 4 vulnerabilities addressed #5

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22 changes: 13 additions & 9 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,14 +1,18 @@
var { Client } = require('pg')
var express = require("express");
// DEFENSE-IN-DEPTH FIX for SQL Injection
// Layer 1 (Entry): Validate input type and format
const userId = parseInt(req.params.id, 10);
if (isNaN(userId) || userId < 0) {
return res.status(400).json({ error: 'Invalid user ID' });
}

var port = 8080;
// Layer 2 (Business): Use parameterized query
const result = await client.query(
'SELECT * FROM users WHERE id = $1',
[userId]
);

var client = new Client({
user: "postgres",
password: "mysecretpassword",
host: "localhost",
port: 5432,
database: "postgres",
// Layer 3 (Output): Return only necessary fields
res.json({ id: result.rows[0]?.id, name: result.rows[0]?.name });atabase: "postgres",
})
client.connect()

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