Quickie proxy that logs requests while forwarding to another service

httpProxy.js

const http = require('http');

const destHost = 'localhost';
const destPort = 4002;

http.createServer((req, res) => {
	console.log(`> ${req.method} ${req.url}`);
	for (let k in req.headers) {
		console.log(`> ${k} = ${req.headers[k]}`)
	}

	const subReq = http.request({
		host: destHost,
		port: destPort,
		path: req.url,
		headers: req.headers,
		method: req.method,
	}, subRes => {
		console.log(`< ${subRes.statusCode}`)
		for (let k in subRes.headers) {
			console.log(`< ${k} = ${subRes.headers[k]}`);
			res.setHeader(k, subRes.headers[k]);
		}
		subRes.on('data', chunk => {
			console.log('<< ' + chunk);
			res.write(chunk);
		});
		subRes.on('close', () => {
			console.log('< (response closed)');
			res.end();
		});
		subRes.on('finish', () => {
			console.log('< (response finished)');
			res.end();
		});
	});

	if (req.complete) {
		console.log('> (request complete with no data)');
		subReq.end();
	}

	req.on('data', chunk => {
		console.log('>> ' + chunk);
		subReq.write(chunk);
		if (req.complete) {
			console.log('> (request complete after data)');
			subReq.end();
		}
	});

	req.on('close', () => {
		console.log('> (request closed)');
		subReq.end();
	});
	req.on('aborted', () => {
		console.log('> (request aborted)');
		subReq.end();
	});
}).listen(4003);