method-override

import express from 'express'; import methodOverride from 'method-override'; const app = express(); const port = 3000; // --- Configuration of method-override middleware --- // Option 1: Override using the 'X-HTTP-Method-Override' header app.use(methodOverride('X-HTTP-Method-Override')); // Option 2: Override using a query string parameter named '_method' // This allows clients to send POST requests with ?_method=PUT or ?_method=DELETE app.use(methodOverride('_method')); // Option 3: Custom getter function (e.g., from a form field) app.use(methodOverride(function (req, res) { if (req.body && typeof req.body === 'object' && '_method' in req.body) { // look in urlencoded POST bodies and delete it const method = req.body._method; delete req.body._method; return method; } })); // Ensure method-override is used before any routes or other middleware // that rely on the correct HTTP method (e.g., csurf, route handlers). // --- Example Routes --- app.get('/', (req, res) => { res.send(` <h1>Method Override Example</h1> <p>Original Method: ${req.originalMethod}</p> <p>Current Method: ${req.method}</p> <form action="/resource?_method=DELETE" method="POST"> <button type="submit">Delete via Query String</button> </form> <p>Try sending a POST request with 'X-HTTP-Method-Override: PUT' header to /resource.</p> `); }); app.all('/resource', (req, res) => { const message = `Received a ${req.method} request to /resource (original: ${req.originalMethod || req.method})`; console.log(message); res.status(200).send(message); }); app.listen(port, () => { console.log(`Server listening at http://localhost:${port}`); console.log('Test with curl:'); console.log(' curl -X POST -H "X-HTTP-Method-Override: PUT" http://localhost:3000/resource'); console.log(' curl -X POST "http://localhost:3000/resource?_method=DELETE"'); });