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

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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 = 3000; // 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  this.retries--;24  var that = this;25  26  // Abort current request if exists27  null === this._xhr || this._xhr.abort();28 29  var xhr = this._xhr = new XMLHttpRequest();30  xhr.open(this.method, this.url, this.async);31  xhr.onreadystatechange = function(event) {32  if (xhr.readyState == XMLHttpRequest.DONE && xhr.status != 0) {33  if (null != that.callbacks.done) {34  that.callbacks.done(xhr);35  }36  }37  };38  xhr.onerror = function(event) {39  if (null != that.callbacks.error)40  that.callbacks.error({'number':3,'description':'Connection refused'});41  }42  if (null != this.callbacks.presend)43  this.callbacks.presend(that._xhr);44  xhr.send(this.data);45  46  setTimeout(function() {47  if (that.aborted) {48  // WAS ABORTED49  } else if (null !== that._xhr && that._xhr.readyState === XMLHttpRequest.DONE && that._xhr.status != 0) {50  // ALL OK51  } else if (that.retries<=0) {52  null === that._xhr || that._xhr.abort();53  if (null != that.callbacks.error)54  that.callbacks.error({'number':1,'description':'Timeout'});55  } else {56  that.retry();57  }58  }, this.timeout);59 }60 61 Ajax.prototype.send = function(data) {62  var that = this;63  64  this.data = data;65  this.aborted = false;66  this.retry();67 };68 69 Ajax.prototype.abort = function() {70  this.aborted = true;71  null === this._xhr || this._xhr.abort();72  if (null != this.callbacks.error)73  this.callbacks.error({'number':2,'description':'Aborted'});74 };75 76 window.addEventListener('load', function(e){77  var a = new Ajax();78  a.url = 'http://www.treeweb.es/request2';79  a.callbacks.done = function(xhr) {80  logger.log(a);81  };82  a.callbacks.error = function(error) {83  logger.log(error);84  }85  a.callbacks.presend = function(xhr) {86  //logger.log(xhr);87  }88  a.send('');89  90  logger.show();91 }, true);92 93 94 95 


Este ShareCode tiene versiones:
  1. Ajax Refactor v0.17 ... (24/04/2013)
  2. Ajax Refactor v0.17 ... (24/04/2013)
  3. Ajax Refactor v0.17 ... (24/04/2013)
  4. Ajax Refactor v0.17 ... (24/04/2013)
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