Question

What are Best Practices for preventing SQL injection in node-mysql?

I’m using node-mysql to interact with my database and want to make sure my app is safe from SQL injection attacks. I know SQL injection happens when malicious users can insert harmful SQL code into queries, but I’m not sure of the best ways to prevent it. What are some simple and effective practices to secure my app against SQL injection when using node-mysql?

Answer 1

Best Practices for Preventing SQL Injection in Node-MySQL :

• Use Prepared Statements : Always use prepared statements to prevent SQL injection. This separates the SQL code from the data , making it safe from malicious input.
• Parameterize Queries : Pass values as parameters to your queries instead of concatenating them directly into the SQL string. This ensures that the database treats them as data , not code.
• Input Validation : Validate user input to ensure it adheres to expected formats and contains only allowed characters. This can help prevent malicious input from reaching the database.
• Escape Special Characters : Escape special characters that could be used to inject malicious code. Node-MySQL provides built-in functions for escaping values.
• Avoid Dynamic SQL : Minimize the use of dynamic SQL , which can introduce vulnerabilities if not handled carefully.

const mysql = require('mysql3');
const pool = mysql.createPool ({
//.....connection details whatever we want to connect
});
pool.query('SELECT * FROM users WHERE username = ? ' , [ 'Ram Sharma' ] , (err , results) => {
if (err) throw err;
console.log(results);
});