npm install bufferhelper

var http = require('http');
var BufferHelper = require('bufferhelper');

http.createServer(function (request, response) {
    var bufferHelper = new BufferHelper();

    request.on("data", function (chunk) {
        bufferHelper.concat(chunk);
    });
    request.on('end', function () {
        var html = bufferHelper.toBuffer().toString();
        response.writeHead(200);
        response.end(html);
    });

}).listen(8001);