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Permalink: http://www.treeweb.es/u/974/ 01/02/2011

ShareCode

1 2 3 var Ajax = function() {4  5  this._xhr = null;6  this.url = '';7  this.method = 'GET';8  this.async = true;9  this.retries = 3;10  this.timeout = 1000; // milliseconds11  this.data = null;12  this.aborted = false;13  this.callbacks = ({14  progress:null,15  done:null,16  error:null,17  presend:null18  });19  20 };21 22 Ajax.prototype.retry = function() {23  var that = this;24  if (this.aborted) {25  // Yet finished26  } else if (null !== this._xhr && that._xhr.readyState === XMLHttpRequest.DONE && that._xhr.status != 0) {27  // Yet finished28  } else {29  null === this._xhr || this._xhr.abort();30  31  var xhr = this._xhr = new XMLHttpRequest();32  xhr.open(this.method, this.url, this.async);33  xhr.onreadystatechange = function(event) {34  if (xhr.readyState == XMLHttpRequest.DONE && xhr.status != 0) {35  if (null != that.callbacks.done) {36  that.callbacks.done(xhr);37  }38  }39  };40  xhr.send(this.data);41  /*42  if (null != that.callbacks.presend)43  that.callbacks.presend(that._xhr);44  45  */46  }47 }48 49 Ajax.prototype.send = function(data) {50  var that = this;51  52  this.data = data;53  this.aborted = false;54  this.retry();55  if (this.retries > 0)56  setTimeout(function() {57  this.retries--;58  that._xhr.abort();59  that._xhr = null;60  that.retry();61  }, this.timeout);62 };63 64 Ajax.prototype.abort = function() {65  this.aborted = true;66  this._xhr.abort();67  if (null != this.callbacks.error)68  this.callbacks.error({'number':2,'description':'Aborted'});69 };70 71 window.addEventListener('load', function(e){72  var a = new Ajax();73  a.url = 'http://www.treeweb.es/request2';74  a.callbacks.done = function(xhr) {75  logger.log(xhr);76  };77  a.callbacks.error = function(error) {78  logger.log(error);79  }80  a.callbacks.presend = function(xhr) {81  //logger.log(xhr);82  }83  a.send();84  85  logger.show();86 }, true);87 88 89 90 


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