Simple mock rest server of nodejs

mock.js

var http = require('http');
    var create = false;
    http.createServer(function (req, res) {
      res.writeHead(200, {'Content-Type': 'application/json'});
      if (req.url === '/rpc/Cloud/Host/List') {
        res.end(JSON.stringify({ Items: [ { StateType: 5 } ] }));
      } else if (req.url === '/rpc/Cloud/Injections/CreateRequestWith') {
        if (create) {
          res.end(JSON.stringify({ Err: 'Request again!' }));
          process.exit(1);
        } else {
          res.end('OK');
          create = true;
        }
      } else if (req.url === '/test') {
        res.writeHeader(200, {'Access-Control-Allow-Origin': '*'});
        var i = 0;
        (function _do() {
          res.write('progress: ' + (i*10) + '% done.\n');
          if (i < 10) {
            setTimeout(function() {
              i += 1;
              _do();
            }, 500);
          } else {
            res.end('OK');
          }
        })();
      }
    }).listen(8765);