express-msgpack

import express from 'express'; import msgpack from 'express-msgpack'; import { pack, unpack } from 'msgpack'; // Example: Using an alternative MessagePack library const app = express(); const port = 3000; // Basic usage: Initialize the middleware. It will use @msgpack/msgpack by default. app.use(msgpack()); // Example with custom encoder/decoder functions and additional options: /* app.use(msgpack({ decoder: unpack, // Custom function to decode MessagePack bytes to JS object encoder: (obj) => Buffer.from(pack(obj)), // Custom function to encode JS object to MessagePack Buffer limit: '1mb', // Set the maximum request body size mimeType: 'application/x-msgpack', // Custom MIME type if needed allowUnacceptableResponse: true // Send MessagePack even if client's Accept header doesn't explicitly include it })); */ app.get('/', (req, res) => { // If the client's Accept header includes 'application/msgpack', the response will be MessagePack encoded. res.json({ message: 'Hello from Express, potentially MessagePack encoded!' }); }); app.post('/data', express.json(), (req, res) => { // If client sends Content-Type: application/msgpack, req.body will be automatically decoded. // This endpoint also accepts standard JSON for demonstration. console.log('Received MessagePack or JSON data:', req.body); res.status(200).json({ received: req.body, status: 'processed' }); }); app.listen(port, () => { console.log(`Server listening on http://localhost:${port}`); });