Form handling

index.js

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

http.createServer(function (req, res) {
        if (req.method != "POST") {
                res.writeHead(400);
                res.end();
                return;
        }

        var body = '';
        req.on('data', function (data) {
                body += data;

                if (body.length > 1e6) {
                        req.connection.destroy();
                }
        });

        req.on('end', function () {
                var post = qs.parse(body);
                fs.appendFileSync('submissions.txt', JSON.stringify(post));

                res.writeHead(302, {Location: post['_redirect']});
                res.end();
        });
}).listen(4000);

console.log("Listening on port 4000");