processPost.js

var http = require("http");
var qs = require("querystring");

function processPost(request, response, callback) {
    var queryData = "";
    if (typeof callback !== "function") return null;

    if (request.method == "POST") {
        request.on("data", function(data) { 
            queryData += data;
            if (queryData.length > 1e6) {
                queryData = "";
                response.writeHead(415, {"Content-Type": "text/plain"});
                response.end();
                request.connection.destroy();
            }
        });

        request.on("end", function() {
            response.post = qs.parse(queryData);
            callback(response);
        });

    } else {
        response.writeHead(405, {"Content-Type": "text/plain"});
        response.end();
    }
}

exports.processPost = processPost;