First commit

hGameTest/node_modules/sockjs-client/lib/transport/sender/xdr.js

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+'use strict';
+
+var EventEmitter = require('events').EventEmitter
+  , inherits = require('inherits')
+  , eventUtils = require('../../utils/event')
+  , browser = require('../../utils/browser')
+  , urlUtils = require('../../utils/url')
+  ;
+
+var debug = function() {};
+if (process.env.NODE_ENV !== 'production') {
+  debug = require('debug')('sockjs-client:sender:xdr');
+}
+
+// References:
+//   http://ajaxian.com/archives/100-line-ajax-wrapper
+//   http://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx
+
+function XDRObject(method, url, payload) {
+  debug(method, url);
+  var self = this;
+  EventEmitter.call(this);
+
+  setTimeout(function() {
+    self._start(method, url, payload);
+  }, 0);
+}
+
+inherits(XDRObject, EventEmitter);
+
+XDRObject.prototype._start = function(method, url, payload) {
+  debug('_start');
+  var self = this;
+  var xdr = new global.XDomainRequest();
+  // IE caches even POSTs
+  url = urlUtils.addQuery(url, 't=' + (+new Date()));
+
+  xdr.onerror = function() {
+    debug('onerror');
+    self._error();
+  };
+  xdr.ontimeout = function() {
+    debug('ontimeout');
+    self._error();
+  };
+  xdr.onprogress = function() {
+    debug('progress', xdr.responseText);
+    self.emit('chunk', 200, xdr.responseText);
+  };
+  xdr.onload = function() {
+    debug('load');
+    self.emit('finish', 200, xdr.responseText);
+    self._cleanup(false);
+  };
+  this.xdr = xdr;
+  this.unloadRef = eventUtils.unloadAdd(function() {
+    self._cleanup(true);
+  });
+  try {
+    // Fails with AccessDenied if port number is bogus
+    this.xdr.open(method, url);
+    if (this.timeout) {
+      this.xdr.timeout = this.timeout;
+    }
+    this.xdr.send(payload);
+  } catch (x) {
+    this._error();
+  }
+};
+
+XDRObject.prototype._error = function() {
+  this.emit('finish', 0, '');
+  this._cleanup(false);
+};
+
+XDRObject.prototype._cleanup = function(abort) {
+  debug('cleanup', abort);
+  if (!this.xdr) {
+    return;
+  }
+  this.removeAllListeners();
+  eventUtils.unloadDel(this.unloadRef);
+
+  this.xdr.ontimeout = this.xdr.onerror = this.xdr.onprogress = this.xdr.onload = null;
+  if (abort) {
+    try {
+      this.xdr.abort();
+    } catch (x) {
+      // intentionally empty
+    }
+  }
+  this.unloadRef = this.xdr = null;
+};
+
+XDRObject.prototype.close = function() {
+  debug('close');
+  this._cleanup(true);
+};
+
+// IE 8/9 if the request target uses the same scheme - #79
+XDRObject.enabled = !!(global.XDomainRequest && browser.hasDomain());
+
+module.exports = XDRObject;