2
Copyright (c) 2009, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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* The Connection Manager provides a simplified interface to the XMLHttpRequest
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* object. It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
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* interactive states and server response, returning the results to a pre-defined
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* callback you create.
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* @namespace YAHOO.util
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* The Connection Manager singleton provides methods for creating and managing
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* asynchronous transactions.
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* @description Array of MSFT ActiveX ids for XMLHttpRequest.
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* @property _msxml_progid
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* @description Object literal of HTTP header(s)
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* @property _http_header
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* @description Determines if HTTP headers are set.
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* @property _has_http_headers
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_has_http_headers:false,
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* @description Determines if a default header of
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* Content-Type of 'application/x-www-form-urlencoded'
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* will be added to any client HTTP headers sent for POST
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* @property _use_default_post_header
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_use_default_post_header:true,
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* @description The default header used for POST transactions.
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* @property _default_post_header
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_default_post_header:'application/x-www-form-urlencoded; charset=UTF-8',
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* @description The default header used for transactions involving the
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* @property _default_form_header
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_default_form_header:'application/x-www-form-urlencoded',
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* @description Determines if a default header of
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* 'X-Requested-With: XMLHttpRequest'
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* will be added to each transaction.
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* @property _use_default_xhr_header
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_use_default_xhr_header:true,
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* @description The default header value for the label
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* "X-Requested-With". This is sent with each
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* transaction, by default, to identify the
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* request as being made by YUI Connection Manager.
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* @property _default_xhr_header
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_default_xhr_header:'XMLHttpRequest',
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* @description Determines if custom, default headers
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* are set for each transaction.
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* @property _has_default_header
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_has_default_headers:true,
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* @description Determines if custom, default headers
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* are set for each transaction.
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* @property _has_default_header
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* @description Property modified by setForm() to determine if the data
135
* should be submitted as an HTML form.
136
* @property _isFormSubmit
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* @description Property modified by setForm() to determine if a file(s)
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* upload is expected.
146
* @property _isFileUpload
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* @description Property modified by setForm() to set a reference to the HTML
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* form node if the desired action is file upload.
156
* @property _formNode
164
* @description Property modified by setForm() to set the HTML form data
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* for each transaction.
166
* @property _sFormData
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* @description Collection of polling references to the polling mechanism in handleReadyState.
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* @description Queue of timeout values for each transaction callback with a defined timeout value.
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* @description The polling frequency, in milliseconds, for HandleReadyState.
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* when attempting to determine a transaction's XHR readyState.
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* The default is 50 milliseconds.
195
* @property _polling_interval
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_polling_interval:50,
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* @description A transaction counter that increments the transaction id for each transaction.
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* @property _transaction_id
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* @description Tracks the name-value pair of the "clicked" submit button if multiple submit
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* buttons are present in an HTML form; and, if YAHOO.util.Event is available.
214
* @property _submitElementValue
219
_submitElementValue:null,
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* @description Determines whether YAHOO.util.Event is available and returns true or false.
223
* If true, an event listener is bound at the document level to trap click events that
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* resolve to a target type of "Submit". This listener will enable setForm() to determine
225
* the clicked "Submit" value in a multi-Submit button, HTML form.
226
* @property _hasSubmitListener
230
_hasSubmitListener:(function()
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if(YAHOO.util.Event){
233
YAHOO.util.Event.addListener(
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var obj = YAHOO.util.Event.getTarget(e),
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name = obj.nodeName.toLowerCase();
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if((name === 'input' || name === 'button') && (obj.type && obj.type.toLowerCase() == 'submit')){
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YAHOO.util.Connect._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
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* @description Custom event that fires at the start of a transaction
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* @property startEvent
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startEvent: new YAHOO.util.CustomEvent('start'),
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* @description Custom event that fires when a transaction response has completed.
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* @property completeEvent
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completeEvent: new YAHOO.util.CustomEvent('complete'),
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* @description Custom event that fires when handleTransactionResponse() determines a
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* response in the HTTP 2xx range.
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* @property successEvent
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successEvent: new YAHOO.util.CustomEvent('success'),
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* @description Custom event that fires when handleTransactionResponse() determines a
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* response in the HTTP 4xx/5xx range.
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* @property failureEvent
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failureEvent: new YAHOO.util.CustomEvent('failure'),
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* @description Custom event that fires when handleTransactionResponse() determines a
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* response in the HTTP 4xx/5xx range.
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* @property failureEvent
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uploadEvent: new YAHOO.util.CustomEvent('upload'),
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* @description Custom event that fires when a transaction is successfully aborted.
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* @property abortEvent
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abortEvent: new YAHOO.util.CustomEvent('abort'),
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* @description A reference table that maps callback custom events members to its specific
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* @property _customEvents
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onStart:['startEvent', 'start'],
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onComplete:['completeEvent', 'complete'],
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onSuccess:['successEvent', 'success'],
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onFailure:['failureEvent', 'failure'],
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onUpload:['uploadEvent', 'upload'],
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onAbort:['abortEvent', 'abort']
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* @description Member to add an ActiveX id to the existing xml_progid array.
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* In the event(unlikely) a new ActiveX id is introduced, it can be added
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* without internal code modifications.
330
* @param {string} id The ActiveX id to be added to initialize the XHR object.
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setProgId:function(id)
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this._msxml_progid.unshift(id);
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* @description Member to override the default POST header.
340
* @method setDefaultPostHeader
343
* @param {boolean} b Set and use default header - true or false .
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setDefaultPostHeader:function(b)
348
if(typeof b == 'string'){
349
this._default_post_header = b;
351
else if(typeof b == 'boolean'){
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this._use_default_post_header = b;
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* @description Member to override the default transaction header..
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* @method setDefaultXhrHeader
361
* @param {boolean} b Set and use default header - true or false .
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setDefaultXhrHeader:function(b)
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if(typeof b == 'string'){
367
this._default_xhr_header = b;
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this._use_default_xhr_header = b;
375
* @description Member to modify the default polling interval.
376
* @method setPollingInterval
379
* @param {int} i The polling interval in milliseconds.
382
setPollingInterval:function(i)
384
if(typeof i == 'number' && isFinite(i)){
385
this._polling_interval = i;
390
* @description Instantiates a XMLHttpRequest object and returns an object with two properties:
391
* the XMLHttpRequest instance and the transaction id.
392
* @method createXhrObject
395
* @param {int} transactionId Property containing the transaction id for this transaction.
398
createXhrObject:function(transactionId)
403
// Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
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http = new XMLHttpRequest();
405
// Object literal with http and tId properties
406
obj = { conn:http, tId:transactionId };
410
for(var i=0; i<this._msxml_progid.length; ++i){
413
// Instantiates XMLHttpRequest for IE and assign to http
414
http = new ActiveXObject(this._msxml_progid[i]);
415
// Object literal with conn and tId properties
416
obj = { conn:http, tId:transactionId };
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* @description This method is called by asyncRequest to create a
430
* valid connection object for the transaction. It also passes a
431
* transaction id and increments the transaction id counter.
432
* @method getConnectionObject
437
getConnectionObject:function(isFileUpload)
440
var tId = this._transaction_id;
445
o = this.createXhrObject(tId);
454
this._transaction_id++;
465
* @description Method for initiating an asynchronous request via the XHR object.
466
* @method asyncRequest
469
* @param {string} method HTTP transaction method
470
* @param {string} uri Fully qualified path of resource
471
* @param {callback} callback User-defined callback function or object
472
* @param {string} postData POST body
473
* @return {object} Returns the connection object
475
asyncRequest:function(method, uri, callback, postData)
477
var o = (this._isFileUpload)?this.getConnectionObject(true):this.getConnectionObject();
478
var args = (callback && callback.argument)?callback.argument:null;
485
// Intialize any transaction-specific custom events, if provided.
486
if(callback && callback.customevents){
487
this.initCustomEvents(o, callback);
490
if(this._isFormSubmit){
491
if(this._isFileUpload){
492
this.uploadFile(o, callback, uri, postData);
496
// If the specified HTTP method is GET, setForm() will return an
497
// encoded string that is concatenated to the uri to
498
// create a querystring.
499
if(method.toUpperCase() == 'GET'){
500
if(this._sFormData.length !== 0){
501
// If the URI already contains a querystring, append an ampersand
502
// and then concatenate _sFormData to the URI.
503
uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
506
else if(method.toUpperCase() == 'POST'){
507
// If POST data exist in addition to the HTML form data,
508
// it will be concatenated to the form data.
509
postData = postData?this._sFormData + "&" + postData:this._sFormData;
513
if(method.toUpperCase() == 'GET' && (callback && callback.cache === false)){
514
// If callback.cache is defined and set to false, a
515
// timestamp value will be added to the querystring.
516
uri += ((uri.indexOf('?') == -1)?'?':'&') + "rnd=" + new Date().valueOf().toString();
519
o.conn.open(method, uri, true);
521
// Each transaction will automatically include a custom header of
522
// "X-Requested-With: XMLHttpRequest" to identify the request as
523
// having originated from Connection Manager.
524
if(this._use_default_xhr_header){
525
if(!this._default_headers['X-Requested-With']){
526
this.initHeader('X-Requested-With', this._default_xhr_header, true);
530
//If the transaction method is POST and the POST header value is set to true
531
//or a custom value, initalize the Content-Type header to this value.
532
if((method.toUpperCase() === 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
533
this.initHeader('Content-Type', this._default_post_header);
536
//Initialize all default and custom HTTP headers,
537
if(this._has_default_headers || this._has_http_headers){
541
this.handleReadyState(o, callback);
542
o.conn.send(postData || '');
545
// Reset the HTML form data and state properties as
546
// soon as the data are submitted.
547
if(this._isFormSubmit === true){
548
this.resetFormState();
551
// Fire global custom event -- startEvent
552
this.startEvent.fire(o, args);
555
// Fire transaction custom event -- startEvent
556
o.startEvent.fire(o, args);
564
* @description This method creates and subscribes custom events,
565
* specific to each transaction
566
* @method initCustomEvents
569
* @param {object} o The connection object
570
* @param {callback} callback The user-defined callback object
573
initCustomEvents:function(o, callback)
576
// Enumerate through callback.customevents members and bind/subscribe
577
// events that match in the _customEvents table.
578
for(prop in callback.customevents){
579
if(this._customEvents[prop][0]){
580
// Create the custom event
581
o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope)?callback.scope:null);
583
// Subscribe the custom event
584
o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
590
* @description This method serves as a timer that polls the XHR object's readyState
591
* property during a transaction, instead of binding a callback to the
592
* onreadystatechange event. Upon readyState 4, handleTransactionResponse
593
* will process the response, and the timer will be cleared.
594
* @method handleReadyState
597
* @param {object} o The connection object
598
* @param {callback} callback The user-defined callback object
602
handleReadyState:function(o, callback)
606
var args = (callback && callback.argument)?callback.argument:null;
608
if(callback && callback.timeout){
609
this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
612
this._poll[o.tId] = window.setInterval(
614
if(o.conn && o.conn.readyState === 4){
616
// Clear the polling interval for the transaction
617
// and remove the reference from _poll.
618
window.clearInterval(oConn._poll[o.tId]);
619
delete oConn._poll[o.tId];
621
if(callback && callback.timeout){
622
window.clearTimeout(oConn._timeOut[o.tId]);
623
delete oConn._timeOut[o.tId];
626
// Fire global custom event -- completeEvent
627
oConn.completeEvent.fire(o, args);
630
// Fire transaction custom event -- completeEvent
631
o.completeEvent.fire(o, args);
634
oConn.handleTransactionResponse(o, callback);
637
,this._polling_interval);
641
* @description This method attempts to interpret the server response and
642
* determine whether the transaction was successful, or if an error or
643
* exception was encountered.
644
* @method handleTransactionResponse
647
* @param {object} o The connection object
648
* @param {object} callback The user-defined callback object
649
* @param {boolean} isAbort Determines if the transaction was terminated via abort().
652
handleTransactionResponse:function(o, callback, isAbort)
654
var httpStatus, responseObject;
655
var args = (callback && callback.argument)?callback.argument:null;
659
if(o.conn.status !== undefined && o.conn.status !== 0){
660
httpStatus = o.conn.status;
668
// 13030 is a custom code to indicate the condition -- in Mozilla/FF --
669
// when the XHR object's status and statusText properties are
670
// unavailable, and a query attempt throws an exception.
674
if(httpStatus >= 200 && httpStatus < 300 || httpStatus === 1223){
675
responseObject = this.createResponseObject(o, args);
676
if(callback && callback.success){
678
callback.success(responseObject);
681
// If a scope property is defined, the callback will be fired from
682
// the context of the object.
683
callback.success.apply(callback.scope, [responseObject]);
687
// Fire global custom event -- successEvent
688
this.successEvent.fire(responseObject);
691
// Fire transaction custom event -- successEvent
692
o.successEvent.fire(responseObject);
697
// The following cases are wininet.dll error codes that may be encountered.
698
case 12002: // Server timeout
699
case 12029: // 12029 to 12031 correspond to dropped connections.
702
case 12152: // Connection closed by server.
703
case 13030: // See above comments for variable status.
704
responseObject = this.createExceptionObject(o.tId, args, (isAbort?isAbort:false));
705
if(callback && callback.failure){
707
callback.failure(responseObject);
710
callback.failure.apply(callback.scope, [responseObject]);
716
responseObject = this.createResponseObject(o, args);
717
if(callback && callback.failure){
719
callback.failure(responseObject);
722
callback.failure.apply(callback.scope, [responseObject]);
727
// Fire global custom event -- failureEvent
728
this.failureEvent.fire(responseObject);
731
// Fire transaction custom event -- failureEvent
732
o.failureEvent.fire(responseObject);
737
this.releaseObject(o);
738
responseObject = null;
742
* @description This method evaluates the server response, creates and returns the results via
743
* its properties. Success and failure cases will differ in the response
744
* object's property values.
745
* @method createResponseObject
748
* @param {object} o The connection object
749
* @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
752
createResponseObject:function(o, callbackArg)
759
var headerStr = o.conn.getAllResponseHeaders();
760
var header = headerStr.split('\n');
761
for(var i=0; i<header.length; i++){
762
var delimitPos = header[i].indexOf(':');
763
if(delimitPos != -1){
764
headerObj[header[i].substring(0,delimitPos)] = header[i].substring(delimitPos+2);
771
// Normalize IE's response to HTTP 204 when Win error 1223.
772
obj.status = (o.conn.status == 1223)?204:o.conn.status;
773
// Normalize IE's statusText to "No Content" instead of "Unknown".
774
obj.statusText = (o.conn.status == 1223)?"No Content":o.conn.statusText;
775
obj.getResponseHeader = headerObj;
776
obj.getAllResponseHeaders = headerStr;
777
obj.responseText = o.conn.responseText;
778
obj.responseXML = o.conn.responseXML;
781
obj.argument = callbackArg;
788
* @description If a transaction cannot be completed due to dropped or closed connections,
789
* there may be not be enough information to build a full response object.
790
* The failure callback will be fired and this specific condition can be identified
791
* by a status property value of 0.
793
* If an abort was successful, the status property will report a value of -1.
795
* @method createExceptionObject
798
* @param {int} tId The Transaction Id
799
* @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
800
* @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
803
createExceptionObject:function(tId, callbackArg, isAbort)
806
var COMM_ERROR = 'communication failure';
808
var ABORT_ERROR = 'transaction aborted';
814
obj.status = ABORT_CODE;
815
obj.statusText = ABORT_ERROR;
818
obj.status = COMM_CODE;
819
obj.statusText = COMM_ERROR;
823
obj.argument = callbackArg;
830
* @description Method that initializes the custom HTTP headers for the each transaction.
834
* @param {string} label The HTTP header label
835
* @param {string} value The HTTP header value
836
* @param {string} isDefault Determines if the specific header is a default header
837
* automatically sent with each transaction.
840
initHeader:function(label, value, isDefault)
842
var headerObj = (isDefault)?this._default_headers:this._http_headers;
843
headerObj[label] = value;
846
this._has_default_headers = true;
849
this._has_http_headers = true;
855
* @description Accessor that sets the HTTP headers for each transaction.
859
* @param {object} o The connection object for the transaction.
862
setHeader:function(o)
865
if(this._has_default_headers){
866
for(prop in this._default_headers){
867
if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
868
o.conn.setRequestHeader(prop, this._default_headers[prop]);
873
if(this._has_http_headers){
874
for(prop in this._http_headers){
875
if(YAHOO.lang.hasOwnProperty(this._http_headers, prop)){
876
o.conn.setRequestHeader(prop, this._http_headers[prop]);
879
delete this._http_headers;
881
this._http_headers = {};
882
this._has_http_headers = false;
887
* @description Resets the default HTTP headers object
888
* @method resetDefaultHeaders
893
resetDefaultHeaders:function(){
894
delete this._default_headers;
895
this._default_headers = {};
896
this._has_default_headers = false;
900
* @description This method assembles the form label and value pairs and
901
* constructs an encoded string.
902
* asyncRequest() will automatically initialize the transaction with a
903
* a HTTP header Content-Type of application/x-www-form-urlencoded.
907
* @param {string || object} form id or name attribute, or form object.
908
* @param {boolean} optional enable file upload.
909
* @param {boolean} optional enable file upload over SSL in IE only.
910
* @return {string} string of the HTML form field name and value pairs..
912
setForm:function(formId, isUpload, secureUri)
914
var oForm, oElement, oName, oValue, oDisabled,
919
this.resetFormState();
921
if(typeof formId == 'string'){
922
// Determine if the argument is a form id or a form name.
923
// Note form name usage is deprecated by supported
924
// here for legacy reasons.
925
oForm = (document.getElementById(formId) || document.forms[formId]);
927
else if(typeof formId == 'object'){
928
// Treat argument as an HTML form object.
935
// If the isUpload argument is true, setForm will call createFrame to initialize
936
// an iframe as the form target.
938
// The argument secureURI is also required by IE in SSL environments
939
// where the secureURI string is a fully qualified HTTP path, used to set the source
940
// of the iframe, to a stub resource in the same domain.
943
// Create iframe in preparation for file upload.
944
this.createFrame(secureUri?secureUri:null);
946
// Set form reference and file upload properties to true.
947
this._isFormSubmit = true;
948
this._isFileUpload = true;
949
this._formNode = oForm;
955
// Iterate over the form elements collection to construct the
956
// label-value pairs.
957
for (i=0,len=oForm.elements.length; i<len; ++i){
958
oElement = oForm.elements[i];
959
oDisabled = oElement.disabled;
960
oName = oElement.name;
962
// Do not submit fields that are disabled or
963
// do not have a name attribute value.
964
if(!oDisabled && oName)
966
oName = encodeURIComponent(oName)+'=';
967
oValue = encodeURIComponent(oElement.value);
969
switch(oElement.type)
971
// Safari, Opera, FF all default opt.value from .text if
972
// value attribute not specified in markup
974
if (oElement.selectedIndex > -1) {
975
opt = oElement.options[oElement.selectedIndex];
976
data[item++] = oName + encodeURIComponent(
977
(opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
980
case 'select-multiple':
981
if (oElement.selectedIndex > -1) {
982
for(j=oElement.selectedIndex, jlen=oElement.options.length; j<jlen; ++j){
983
opt = oElement.options[j];
985
data[item++] = oName + encodeURIComponent(
986
(opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
993
if(oElement.checked){
994
data[item++] = oName + oValue;
998
// stub case as XMLHttpRequest will only send the file path as a string.
1000
// stub case for fieldset element which returns undefined.
1002
// stub case for input type reset button.
1004
// stub case for input type button elements.
1007
if(hasSubmit === false){
1008
if(this._hasSubmitListener && this._submitElementValue){
1009
data[item++] = this._submitElementValue;
1015
data[item++] = oName + oValue;
1020
this._isFormSubmit = true;
1021
this._sFormData = data.join('&');
1024
this.initHeader('Content-Type', this._default_form_header);
1026
return this._sFormData;
1030
* @description Resets HTML form properties when an HTML form or HTML form
1031
* with file upload transaction is sent.
1032
* @method resetFormState
1037
resetFormState:function(){
1038
this._isFormSubmit = false;
1039
this._isFileUpload = false;
1040
this._formNode = null;
1041
this._sFormData = "";
1045
* @description Creates an iframe to be used for form file uploads. It is remove from the
1046
* document upon completion of the upload transaction.
1047
* @method createFrame
1050
* @param {string} optional qualified path of iframe resource for SSL in IE.
1053
createFrame:function(secureUri){
1055
// IE does not allow the setting of id and name attributes as object
1056
// properties via createElement(). A different iframe creation
1057
// pattern is required for IE.
1058
var frameId = 'yuiIO' + this._transaction_id;
1060
if(YAHOO.env.ua.ie){
1061
io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
1063
// IE will throw a security exception in an SSL environment if the
1064
// iframe source is undefined.
1065
if(typeof secureUri == 'boolean'){
1066
io.src = 'javascript:false';
1070
io = document.createElement('iframe');
1075
io.style.position = 'absolute';
1076
io.style.top = '-1000px';
1077
io.style.left = '-1000px';
1079
document.body.appendChild(io);
1083
* @description Parses the POST data and creates hidden form elements
1084
* for each key-value, and appends them to the HTML form object.
1085
* @method appendPostData
1088
* @param {string} postData The HTTP POST data
1089
* @return {array} formElements Collection of hidden fields.
1091
appendPostData:function(postData)
1093
var formElements = [],
1094
postMessage = postData.split('&'),
1096
for(i=0; i < postMessage.length; i++){
1097
delimitPos = postMessage[i].indexOf('=');
1098
if(delimitPos != -1){
1099
formElements[i] = document.createElement('input');
1100
formElements[i].type = 'hidden';
1101
formElements[i].name = decodeURIComponent(postMessage[i].substring(0,delimitPos));
1102
formElements[i].value = decodeURIComponent(postMessage[i].substring(delimitPos+1));
1103
this._formNode.appendChild(formElements[i]);
1107
return formElements;
1111
* @description Uploads HTML form, inclusive of files/attachments, using the
1112
* iframe created in createFrame to facilitate the transaction.
1113
* @method uploadFile
1116
* @param {int} id The transaction id.
1117
* @param {object} callback User-defined callback object.
1118
* @param {string} uri Fully qualified path of resource.
1119
* @param {string} postData POST data to be submitted in addition to HTML form.
1122
uploadFile:function(o, callback, uri, postData){
1124
// Each iframe has an id prefix of "yuiIO" followed
1125
// by the unique transaction id.
1126
var frameId = 'yuiIO' + o.tId,
1127
uploadEncoding = 'multipart/form-data',
1128
io = document.getElementById(frameId),
1130
args = (callback && callback.argument)?callback.argument:null,
1131
oElements,i,prop,obj;
1133
// Track original HTML form attribute values.
1134
var rawFormAttributes =
1136
action:this._formNode.getAttribute('action'),
1137
method:this._formNode.getAttribute('method'),
1138
target:this._formNode.getAttribute('target')
1141
// Initialize the HTML form properties in case they are
1142
// not defined in the HTML form.
1143
this._formNode.setAttribute('action', uri);
1144
this._formNode.setAttribute('method', 'POST');
1145
this._formNode.setAttribute('target', frameId);
1147
if(YAHOO.env.ua.ie){
1148
// IE does not respect property enctype for HTML forms.
1149
// Instead it uses the property - "encoding".
1150
this._formNode.setAttribute('encoding', uploadEncoding);
1153
this._formNode.setAttribute('enctype', uploadEncoding);
1157
oElements = this.appendPostData(postData);
1160
// Start file upload.
1161
this._formNode.submit();
1163
// Fire global custom event -- startEvent
1164
this.startEvent.fire(o, args);
1167
// Fire transaction custom event -- startEvent
1168
o.startEvent.fire(o, args);
1171
// Start polling if a callback is present and the timeout
1172
// property has been defined.
1173
if(callback && callback.timeout){
1174
this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
1177
// Remove HTML elements created by appendPostData
1178
if(oElements && oElements.length > 0){
1179
for(i=0; i < oElements.length; i++){
1180
this._formNode.removeChild(oElements[i]);
1184
// Restore HTML form attributes to their original
1185
// values prior to file upload.
1186
for(prop in rawFormAttributes){
1187
if(YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)){
1188
if(rawFormAttributes[prop]){
1189
this._formNode.setAttribute(prop, rawFormAttributes[prop]);
1192
this._formNode.removeAttribute(prop);
1197
// Reset HTML form state properties.
1198
this.resetFormState();
1200
// Create the upload callback handler that fires when the iframe
1201
// receives the load event. Subsequently, the event handler is detached
1202
// and the iframe removed from the document.
1203
var uploadCallback = function()
1205
if(callback && callback.timeout){
1206
window.clearTimeout(oConn._timeOut[o.tId]);
1207
delete oConn._timeOut[o.tId];
1210
// Fire global custom event -- completeEvent
1211
oConn.completeEvent.fire(o, args);
1213
if(o.completeEvent){
1214
// Fire transaction custom event -- completeEvent
1215
o.completeEvent.fire(o, args);
1220
argument : callback.argument
1225
// responseText and responseXML will be populated with the same data from the iframe.
1226
// Since the HTTP headers cannot be read from the iframe
1227
obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:io.contentWindow.document.documentElement.textContent;
1228
obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
1232
if(callback && callback.upload){
1233
if(!callback.scope){
1234
callback.upload(obj);
1237
callback.upload.apply(callback.scope, [obj]);
1241
// Fire global custom event -- uploadEvent
1242
oConn.uploadEvent.fire(obj);
1245
// Fire transaction custom event -- uploadEvent
1246
o.uploadEvent.fire(obj);
1249
YAHOO.util.Event.removeListener(io, "load", uploadCallback);
1253
document.body.removeChild(io);
1254
oConn.releaseObject(o);
1258
// Bind the onload handler to the iframe to detect the file upload response.
1259
YAHOO.util.Event.addListener(io, "load", uploadCallback);
1263
* @description Method to terminate a transaction, if it has not reached readyState 4.
1267
* @param {object} o The connection object returned by asyncRequest.
1268
* @param {object} callback User-defined callback object.
1269
* @param {string} isTimeout boolean to indicate if abort resulted from a callback timeout.
1272
abort:function(o, callback, isTimeout)
1275
var args = (callback && callback.argument)?callback.argument:null;
1279
if(this.isCallInProgress(o)){
1280
// Issue abort request
1283
window.clearInterval(this._poll[o.tId]);
1284
delete this._poll[o.tId];
1287
window.clearTimeout(this._timeOut[o.tId]);
1288
delete this._timeOut[o.tId];
1294
else if(o && o.isUpload === true){
1295
var frameId = 'yuiIO' + o.tId;
1296
var io = document.getElementById(frameId);
1299
// Remove all listeners on the iframe prior to
1301
YAHOO.util.Event.removeListener(io, "load");
1302
// Destroy the iframe facilitating the transaction.
1303
document.body.removeChild(io);
1306
window.clearTimeout(this._timeOut[o.tId]);
1307
delete this._timeOut[o.tId];
1314
abortStatus = false;
1317
if(abortStatus === true){
1318
// Fire global custom event -- abortEvent
1319
this.abortEvent.fire(o, args);
1322
// Fire transaction custom event -- abortEvent
1323
o.abortEvent.fire(o, args);
1326
this.handleTransactionResponse(o, callback, true);
1333
* @description Determines if the transaction is still being processed.
1334
* @method isCallInProgress
1337
* @param {object} o The connection object returned by asyncRequest
1340
isCallInProgress:function(o)
1342
// if the XHR object assigned to the transaction has not been dereferenced,
1343
// then check its readyState status. Otherwise, return false.
1345
return o.conn.readyState !== 4 && o.conn.readyState !== 0;
1347
else if(o && o.isUpload === true){
1348
var frameId = 'yuiIO' + o.tId;
1349
return document.getElementById(frameId)?true:false;
1357
* @description Dereference the XHR instance and the connection object after the transaction is completed.
1358
* @method releaseObject
1361
* @param {object} o The connection object
1364
releaseObject:function(o)
1367
//dereference the XHR instance.
1371
//dereference the connection object.
1376
YAHOO.register("connection", YAHOO.util.Connect, {version: "2.7.0", build: "1799"});
added
removed
var/httpd/htdocs/yui/2.7.0/build/connection/connection.js
