vnfmarket/src/main/webapp/vnfmarket/node_modules/socket.io/lib/transports/xhr-polling.js

   1
   2 /*!
   3  * socket.io-node
   4  * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
   5  * MIT Licensed
   6  */
   7
   8 /**
   9  * Module requirements.
  10  */
  11
  12 var HTTPPolling = require('./http-polling');
  13
  14 /**
  15  * Export the constructor.
  16  */
  17
  18 exports = module.exports = XHRPolling;
  19
  20 /**
  21  * Ajax polling transport.
  22  *
  23  * @api public
  24  */
  25
  26 function XHRPolling (mng, data, req) {
  27   HTTPPolling.call(this, mng, data, req);
  28 };
  29
  30 /**
  31  * Inherits from Transport.
  32  */
  33
  34 XHRPolling.prototype.__proto__ = HTTPPolling.prototype;
  35
  36 /**
  37  * Transport name
  38  *
  39  * @api public
  40  */
  41
  42 XHRPolling.prototype.name = 'xhr-polling';
  43
  44 /**
  45  * Frames data prior to write.
  46  *
  47  * @api private
  48  */
  49
  50 XHRPolling.prototype.doWrite = function (data) {
  51   HTTPPolling.prototype.doWrite.call(this);
  52
  53   var origin = this.req.headers.origin
  54     , headers = {
  55           'Content-Type': 'text/plain; charset=UTF-8'
  56         , 'Content-Length': data === undefined ? 0 : Buffer.byteLength(data)
  57         , 'Connection': 'Keep-Alive'
  58       };
  59
  60   if (origin) {
  61     // https://developer.mozilla.org/En/HTTP_Access_Control
  62     headers['Access-Control-Allow-Origin'] = origin;
  63     headers['Access-Control-Allow-Credentials'] = 'true';
  64   }
  65
  66   this.response.writeHead(200, headers);
  67   this.response.write(data);
  68   this.log.debug(this.name + ' writing', data);
  69 };