[JavaScript] node.js erste geh versuche

var http = require('http'),
 sys = require('sys'),
 querystring = require('querystring');

// Create the listening server
http.createServer(function(request, response) {
 sys.puts('Request for ' + request.url);
 
 switch (request.url) {
 case '/':
 response.writeHead(200, {
 'Content-Type' : 'text/html'
 });
 response.write(
 '<form action="/post_to_me" method="post">' +
 'Field 1: <input type="text" name="field_1"><br />' +
 'Field 2: <input type="text" name="field_2"><br />' +
 '<input type="submit" value="Submit">' +
 '</form>'
 );
 response.end();
 break;
 case '/post_to_me':
 response.writeHead(200, { 'Content-Type' : 'text/html' });
 
 post_handler(request, function(request_data){
 response.write(
 'Full JSON object:<br />' +
 '<pre>' + sys.inspect(request_data) + '</pre>' +
 '<hr>' +
 'Indivudual parameters:<br />' +
 'Field 1: <strong>' + request_data.field_1 + '</strong><br />' +
 'Field 2: <strong>' + request_data.field_2 + '</strong><br />' +
 '<a href="/">goBack</a><br />'
 );
 response.end();
 });
 break;
 };
}).listen(8080);

function post_handler(request, callback) {
 var _REQUEST = { };
 var _CONTENT = '';
 
 if (request.method == 'POST') {
 request.addListener('data', function(chunk) {
 _CONTENT+= chunk;
 });
 
 request.addListener('end', function() {
 _REQUEST = querystring.parse(_CONTENT);
 callback(_REQUEST);
 });
 };
};