4.1.0 data leak, server, variant 2

impossible-data-leak-server2.js

var http = require('http');
var fs = require('fs');

function doSomethingWithData(data, c) {
	setTimeout(c, 100);
}

http.createServer(function(req, res) {
	// This represents one endpoint
	// This is alternative to reading an empty file. Does not deal with files.
	if (req.url === '/file1') {
		var chunks = [];
		req.on('data', function(chunk) {
			// chunk is a Buffer
			chunks.push(chunk);
		});
		req.on('end', function() {
			// This is a common way of collecting the request body.
			var data = Buffer.concat(chunks);
			doSomethingWithData(data, function() {
				res.end();
			});
		});
		return;
	}

	// This represents an endpoint that receives data
	if (/^\/stuff\//.test(req.url)) {
		req.on('data', function (chunk) {});
		req.on('end', function() {
			res.end();
		});
		return;
	}

	// This represents another endpoint
	if (/^\/token\//.test(req.url)) {
		var x = new Uint8Array(1000);
		if (req.url !== '/token/invalid') {
			x.fill(42); // fill x with something for valid stuff
		} // else do nothing for invalid stuff, but that's ok, correct? Nothing could go wrong. There are zeroes there!
		res.write(x.toString());
		res.end();
		return;
	}

	res.end();
}).listen(7777);