koha-tt/intranet-tmpl/prog/en/lib/yui/connection/connection-debug.js

   1 /*
   2 Copyright (c) 2009, Yahoo! Inc. All rights reserved.
   3 Code licensed under the BSD License:
   4 http://developer.yahoo.net/yui/license.txt
   5 version: 2.8.0r4
   6 */
   7 /**
   8  * The Connection Manager provides a simplified interface to the XMLHttpRequest
   9  * object.  It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
  10  * interactive states and server response, returning the results to a pre-defined
  11  * callback you create.
  12  *
  13  * @namespace YAHOO.util
  14  * @module connection
  15  * @requires yahoo
  16  * @requires event
  17  */
  18
  19 /**
  20  * The Connection Manager singleton provides methods for creating and managing
  21  * asynchronous transactions.
  22  *
  23  * @class Connect
  24  */
  25
  26 YAHOO.util.Connect =
  27 {
  28   /**
  29    * @description Array of MSFT ActiveX ids for XMLHttpRequest.
  30    * @property _msxml_progid
  31    * @private
  32    * @static
  33    * @type array
  34    */
  35         _msxml_progid:[
  36                 'Microsoft.XMLHTTP',
  37                 'MSXML2.XMLHTTP.3.0',
  38                 'MSXML2.XMLHTTP'
  39                 ],
  40
  41   /**
  42    * @description Object literal of HTTP header(s)
  43    * @property _http_header
  44    * @private
  45    * @static
  46    * @type object
  47    */
  48         _http_headers:{},
  49
  50   /**
  51    * @description Determines if HTTP headers are set.
  52    * @property _has_http_headers
  53    * @private
  54    * @static
  55    * @type boolean
  56    */
  57         _has_http_headers:false,
  58
  59  /**
  60   * @description Determines if a default header of
  61   * Content-Type of 'application/x-www-form-urlencoded'
  62   * will be added to any client HTTP headers sent for POST
  63   * transactions.
  64   * @property _use_default_post_header
  65   * @private
  66   * @static
  67   * @type boolean
  68   */
  69     _use_default_post_header:true,
  70
  71  /**
  72   * @description The default header used for POST transactions.
  73   * @property _default_post_header
  74   * @private
  75   * @static
  76   * @type boolean
  77   */
  78     _default_post_header:'application/x-www-form-urlencoded; charset=UTF-8',
  79
  80  /**
  81   * @description The default header used for transactions involving the
  82   * use of HTML forms.
  83   * @property _default_form_header
  84   * @private
  85   * @static
  86   * @type boolean
  87   */
  88     _default_form_header:'application/x-www-form-urlencoded',
  89
  90  /**
  91   * @description Determines if a default header of
  92   * 'X-Requested-With: XMLHttpRequest'
  93   * will be added to each transaction.
  94   * @property _use_default_xhr_header
  95   * @private
  96   * @static
  97   * @type boolean
  98   */
  99     _use_default_xhr_header:true,
 100
 101  /**
 102   * @description The default header value for the label
 103   * "X-Requested-With".  This is sent with each
 104   * transaction, by default, to identify the
 105   * request as being made by YUI Connection Manager.
 106   * @property _default_xhr_header
 107   * @private
 108   * @static
 109   * @type boolean
 110   */
 111     _default_xhr_header:'XMLHttpRequest',
 112
 113  /**
 114   * @description Determines if custom, default headers
 115   * are set for each transaction.
 116   * @property _has_default_header
 117   * @private
 118   * @static
 119   * @type boolean
 120   */
 121     _has_default_headers:true,
 122
 123  /**
 124   * @description Determines if custom, default headers
 125   * are set for each transaction.
 126   * @property _has_default_header
 127   * @private
 128   * @static
 129   * @type boolean
 130   */
 131     _default_headers:{},
 132
 133  /**
 134   * @description Collection of polling references to the polling mechanism in handleReadyState.
 135   * @property _poll
 136   * @private
 137   * @static
 138   * @type object
 139   */
 140     _poll:{},
 141
 142  /**
 143   * @description Queue of timeout values for each transaction callback with a defined timeout value.
 144   * @property _timeOut
 145   * @private
 146   * @static
 147   * @type object
 148   */
 149     _timeOut:{},
 150
 151   /**
 152    * @description The polling frequency, in milliseconds, for HandleReadyState.
 153    * when attempting to determine a transaction's XHR readyState.
 154    * The default is 50 milliseconds.
 155    * @property _polling_interval
 156    * @private
 157    * @static
 158    * @type int
 159    */
 160      _polling_interval:50,
 161
 162   /**
 163    * @description A transaction counter that increments the transaction id for each transaction.
 164    * @property _transaction_id
 165    * @private
 166    * @static
 167    * @type int
 168    */
 169      _transaction_id:0,
 170
 171   /**
 172    * @description Custom event that fires at the start of a transaction
 173    * @property startEvent
 174    * @private
 175    * @static
 176    * @type CustomEvent
 177    */
 178         startEvent: new YAHOO.util.CustomEvent('start'),
 179
 180   /**
 181    * @description Custom event that fires when a transaction response has completed.
 182    * @property completeEvent
 183    * @private
 184    * @static
 185    * @type CustomEvent
 186    */
 187         completeEvent: new YAHOO.util.CustomEvent('complete'),
 188
 189   /**
 190    * @description Custom event that fires when handleTransactionResponse() determines a
 191    * response in the HTTP 2xx range.
 192    * @property successEvent
 193    * @private
 194    * @static
 195    * @type CustomEvent
 196    */
 197         successEvent: new YAHOO.util.CustomEvent('success'),
 198
 199   /**
 200    * @description Custom event that fires when handleTransactionResponse() determines a
 201    * response in the HTTP 4xx/5xx range.
 202    * @property failureEvent
 203    * @private
 204    * @static
 205    * @type CustomEvent
 206    */
 207         failureEvent: new YAHOO.util.CustomEvent('failure'),
 208
 209   /**
 210    * @description Custom event that fires when a transaction is successfully aborted.
 211    * @property abortEvent
 212    * @private
 213    * @static
 214    * @type CustomEvent
 215    */
 216         abortEvent: new YAHOO.util.CustomEvent('abort'),
 217
 218   /**
 219    * @description A reference table that maps callback custom events members to its specific
 220    * event name.
 221    * @property _customEvents
 222    * @private
 223    * @static
 224    * @type object
 225    */
 226         _customEvents:
 227         {
 228                 onStart:['startEvent', 'start'],
 229                 onComplete:['completeEvent', 'complete'],
 230                 onSuccess:['successEvent', 'success'],
 231                 onFailure:['failureEvent', 'failure'],
 232                 onUpload:['uploadEvent', 'upload'],
 233                 onAbort:['abortEvent', 'abort']
 234         },
 235
 236   /**
 237    * @description Member to add an ActiveX id to the existing xml_progid array.
 238    * In the event(unlikely) a new ActiveX id is introduced, it can be added
 239    * without internal code modifications.
 240    * @method setProgId
 241    * @public
 242    * @static
 243    * @param {string} id The ActiveX id to be added to initialize the XHR object.
 244    * @return void
 245    */
 246         setProgId:function(id)
 247         {
 248                 this._msxml_progid.unshift(id);
 249                 YAHOO.log('ActiveX Program Id  ' + id + ' added to _msxml_progid.', 'info', 'Connection');
 250         },
 251
 252   /**
 253    * @description Member to override the default POST header.
 254    * @method setDefaultPostHeader
 255    * @public
 256    * @static
 257    * @param {boolean} b Set and use default header - true or false .
 258    * @return void
 259    */
 260         setDefaultPostHeader:function(b)
 261         {
 262                 if(typeof b == 'string'){
 263                         this._default_post_header = b;
 264                         YAHOO.log('Default POST header set to  ' + b, 'info', 'Connection');
 265                 }
 266                 else if(typeof b == 'boolean'){
 267                         this._use_default_post_header = b;
 268                 }
 269         },
 270
 271   /**
 272    * @description Member to override the default transaction header..
 273    * @method setDefaultXhrHeader
 274    * @public
 275    * @static
 276    * @param {boolean} b Set and use default header - true or false .
 277    * @return void
 278    */
 279         setDefaultXhrHeader:function(b)
 280         {
 281                 if(typeof b == 'string'){
 282                         this._default_xhr_header = b;
 283                         YAHOO.log('Default XHR header set to  ' + b, 'info', 'Connection');
 284                 }
 285                 else{
 286                         this._use_default_xhr_header = b;
 287                 }
 288         },
 289
 290   /**
 291    * @description Member to modify the default polling interval.
 292    * @method setPollingInterval
 293    * @public
 294    * @static
 295    * @param {int} i The polling interval in milliseconds.
 296    * @return void
 297    */
 298         setPollingInterval:function(i)
 299         {
 300                 if(typeof i == 'number' && isFinite(i)){
 301                         this._polling_interval = i;
 302                         YAHOO.log('Default polling interval set to ' + i +'ms', 'info', 'Connection');
 303                 }
 304         },
 305
 306   /**
 307    * @description Instantiates a XMLHttpRequest object and returns an object with two properties:
 308    * the XMLHttpRequest instance and the transaction id.
 309    * @method createXhrObject
 310    * @private
 311    * @static
 312    * @param {int} transactionId Property containing the transaction id for this transaction.
 313    * @return object
 314    */
 315         createXhrObject:function(transactionId)
 316         {
 317                 var obj,http,i;
 318                 try
 319                 {
 320                         // Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
 321                         http = new XMLHttpRequest();
 322                         //  Object literal with http and tId properties
 323                         obj = { conn:http, tId:transactionId, xhr: true };
 324                         YAHOO.log('XHR object created for transaction ' + transactionId, 'info', 'Connection');
 325                 }
 326                 catch(e)
 327                 {
 328                         for(i=0; i<this._msxml_progid.length; ++i){
 329                                 try
 330                                 {
 331                                         // Instantiates XMLHttpRequest for IE and assign to http
 332                                         http = new ActiveXObject(this._msxml_progid[i]);
 333                                         //  Object literal with conn and tId properties
 334                                         obj = { conn:http, tId:transactionId, xhr: true };
 335                                         YAHOO.log('ActiveX XHR object created for transaction ' + transactionId, 'info', 'Connection');
 336                                         break;
 337                                 }
 338                                 catch(e1){}
 339                         }
 340                 }
 341                 finally
 342                 {
 343                         return obj;
 344                 }
 345         },
 346
 347   /**
 348    * @description This method is called by asyncRequest to create a
 349    * valid connection object for the transaction.  It also passes a
 350    * transaction id and increments the transaction id counter.
 351    * @method getConnectionObject
 352    * @private
 353    * @static
 354    * @return {object}
 355    */
 356         getConnectionObject:function(t)
 357         {
 358                 var o, tId = this._transaction_id;
 359
 360                 try
 361                 {
 362                         if(!t){
 363                                 o = this.createXhrObject(tId);
 364                         }
 365                         else{
 366                                 o = {tId:tId};
 367                                 if(t==='xdr'){
 368                                         o.conn = this._transport;
 369                                         o.xdr = true;
 370                                 }
 371                                 else if(t==='upload'){
 372                                         o.upload = true;
 373                                 }
 374                         }
 375
 376                         if(o){
 377                                 this._transaction_id++;
 378                         }
 379                 }
 380                 catch(e){}
 381                 return o;
 382         },
 383
 384   /**
 385    * @description Method for initiating an asynchronous request via the XHR object.
 386    * @method asyncRequest
 387    * @public
 388    * @static
 389    * @param {string} method HTTP transaction method
 390    * @param {string} uri Fully qualified path of resource
 391    * @param {callback} callback User-defined callback function or object
 392    * @param {string} postData POST body
 393    * @return {object} Returns the connection object
 394    */
 395         asyncRequest:function(method, uri, callback, postData)
 396         {
 397                 var o,t,args = (callback && callback.argument)?callback.argument:null;
 398
 399                 if(this._isFileUpload){
 400                         t = 'upload';
 401                 }
 402                 else if(callback.xdr){
 403                         t = 'xdr';
 404                 }
 405
 406                 o = this.getConnectionObject(t);
 407                 if(!o){
 408                         YAHOO.log('Unable to create connection object.', 'error', 'Connection');
 409                         return null;
 410                 }
 411                 else{
 412
 413                         // Intialize any transaction-specific custom events, if provided.
 414                         if(callback && callback.customevents){
 415                                 this.initCustomEvents(o, callback);
 416                         }
 417
 418                         if(this._isFormSubmit){
 419                                 if(this._isFileUpload){
 420                                         this.uploadFile(o, callback, uri, postData);
 421                                         return o;
 422                                 }
 423
 424                                 // If the specified HTTP method is GET, setForm() will return an
 425                                 // encoded string that is concatenated to the uri to
 426                                 // create a querystring.
 427                                 if(method.toUpperCase() == 'GET'){
 428                                         if(this._sFormData.length !== 0){
 429                                                 // If the URI already contains a querystring, append an ampersand
 430                                                 // and then concatenate _sFormData to the URI.
 431                                                 uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
 432                                         }
 433                                 }
 434                                 else if(method.toUpperCase() == 'POST'){
 435                                         // If POST data exist in addition to the HTML form data,
 436                                         // it will be concatenated to the form data.
 437                                         postData = postData?this._sFormData + "&" + postData:this._sFormData;
 438                                 }
 439                         }
 440
 441                         if(method.toUpperCase() == 'GET' && (callback && callback.cache === false)){
 442                                 // If callback.cache is defined and set to false, a
 443                                 // timestamp value will be added to the querystring.
 444                                 uri += ((uri.indexOf('?') == -1)?'?':'&') + "rnd=" + new Date().valueOf().toString();
 445                         }
 446
 447                         // Each transaction will automatically include a custom header of
 448                         // "X-Requested-With: XMLHttpRequest" to identify the request as
 449                         // having originated from Connection Manager.
 450                         if(this._use_default_xhr_header){
 451                                 if(!this._default_headers['X-Requested-With']){
 452                                         this.initHeader('X-Requested-With', this._default_xhr_header, true);
 453                                         YAHOO.log('Initialize transaction header X-Request-Header to XMLHttpRequest.', 'info', 'Connection');
 454                                 }
 455                         }
 456
 457                         //If the transaction method is POST and the POST header value is set to true
 458                         //or a custom value, initalize the Content-Type header to this value.
 459                         if((method.toUpperCase() === 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
 460                                 this.initHeader('Content-Type', this._default_post_header);
 461                                 YAHOO.log('Initialize header Content-Type to application/x-www-form-urlencoded; UTF-8 for POST transaction.', 'info', 'Connection');
 462                         }
 463
 464                         if(o.xdr){
 465                                 this.xdr(o, method, uri, callback, postData);
 466                                 return o;
 467                         }
 468
 469                         o.conn.open(method, uri, true);
 470                         //Initialize all default and custom HTTP headers,
 471                         if(this._has_default_headers || this._has_http_headers){
 472                                 this.setHeader(o);
 473                         }
 474
 475                         this.handleReadyState(o, callback);
 476                         o.conn.send(postData || '');
 477                         YAHOO.log('Transaction ' + o.tId + ' sent.', 'info', 'Connection');
 478
 479                         // Reset the HTML form data and state properties as
 480                         // soon as the data are submitted.
 481                         if(this._isFormSubmit === true){
 482                                 this.resetFormState();
 483                         }
 484
 485                         // Fire global custom event -- startEvent
 486                         this.startEvent.fire(o, args);
 487
 488                         if(o.startEvent){
 489                                 // Fire transaction custom event -- startEvent
 490                                 o.startEvent.fire(o, args);
 491                         }
 492
 493                         return o;
 494                 }
 495         },
 496
 497   /**
 498    * @description This method creates and subscribes custom events,
 499    * specific to each transaction
 500    * @method initCustomEvents
 501    * @private
 502    * @static
 503    * @param {object} o The connection object
 504    * @param {callback} callback The user-defined callback object
 505    * @return {void}
 506    */
 507         initCustomEvents:function(o, callback)
 508         {
 509                 var prop;
 510                 // Enumerate through callback.customevents members and bind/subscribe
 511                 // events that match in the _customEvents table.
 512                 for(prop in callback.customevents){
 513                         if(this._customEvents[prop][0]){
 514                                 // Create the custom event
 515                                 o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope)?callback.scope:null);
 516                                 YAHOO.log('Transaction-specific Custom Event ' + o[this._customEvents[prop][1]] + ' created.', 'info', 'Connection');
 517
 518                                 // Subscribe the custom event
 519                                 o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
 520                                 YAHOO.log('Transaction-specific Custom Event ' + o[this._customEvents[prop][1]] + ' subscribed.', 'info', 'Connection');
 521                         }
 522                 }
 523         },
 524
 525   /**
 526    * @description This method serves as a timer that polls the XHR object's readyState
 527    * property during a transaction, instead of binding a callback to the
 528    * onreadystatechange event.  Upon readyState 4, handleTransactionResponse
 529    * will process the response, and the timer will be cleared.
 530    * @method handleReadyState
 531    * @private
 532    * @static
 533    * @param {object} o The connection object
 534    * @param {callback} callback The user-defined callback object
 535    * @return {void}
 536    */
 537
 538     handleReadyState:function(o, callback)
 539
 540     {
 541                 var oConn = this,
 542                         args = (callback && callback.argument)?callback.argument:null;
 543
 544                 if(callback && callback.timeout){
 545                         this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
 546                 }
 547
 548                 this._poll[o.tId] = window.setInterval(
 549                         function(){
 550                                 if(o.conn && o.conn.readyState === 4){
 551
 552                                         // Clear the polling interval for the transaction
 553                                         // and remove the reference from _poll.
 554                                         window.clearInterval(oConn._poll[o.tId]);
 555                                         delete oConn._poll[o.tId];
 556
 557                                         if(callback && callback.timeout){
 558                                                 window.clearTimeout(oConn._timeOut[o.tId]);
 559                                                 delete oConn._timeOut[o.tId];
 560                                         }
 561
 562                                         // Fire global custom event -- completeEvent
 563                                         oConn.completeEvent.fire(o, args);
 564
 565                                         if(o.completeEvent){
 566                                                 // Fire transaction custom event -- completeEvent
 567                                                 o.completeEvent.fire(o, args);
 568                                         }
 569
 570                                         oConn.handleTransactionResponse(o, callback);
 571                                 }
 572                         }
 573                 ,this._polling_interval);
 574     },
 575
 576   /**
 577    * @description This method attempts to interpret the server response and
 578    * determine whether the transaction was successful, or if an error or
 579    * exception was encountered.
 580    * @method handleTransactionResponse
 581    * @private
 582    * @static
 583    * @param {object} o The connection object
 584    * @param {object} callback The user-defined callback object
 585    * @param {boolean} isAbort Determines if the transaction was terminated via abort().
 586    * @return {void}
 587    */
 588     handleTransactionResponse:function(o, callback, isAbort)
 589     {
 590                 var httpStatus, responseObject,
 591                         args = (callback && callback.argument)?callback.argument:null,
 592                         xdrS = (o.r && o.r.statusText === 'xdr:success')?true:false,
 593                         xdrF = (o.r && o.r.statusText === 'xdr:failure')?true:false,
 594                         xdrA = isAbort;
 595
 596                 try
 597                 {
 598                         if((o.conn.status !== undefined && o.conn.status !== 0) || xdrS){
 599                                 // XDR requests will not have HTTP status defined. The
 600                                 // statusText property will define the response status
 601                                 // set by the Flash transport.
 602                                 httpStatus = o.conn.status;
 603                         }
 604                         else if(xdrF && !xdrA){
 605                                 // Set XDR transaction failure to a status of 0, which
 606                                 // resolves as an HTTP failure, instead of an exception.
 607                                 httpStatus = 0;
 608                         }
 609                         else{
 610                                 httpStatus = 13030;
 611                         }
 612                 }
 613                 catch(e){
 614
 615                          // 13030 is a custom code to indicate the condition -- in Mozilla/FF --
 616                          // when the XHR object's status and statusText properties are
 617                          // unavailable, and a query attempt throws an exception.
 618                         httpStatus = 13030;
 619                 }
 620
 621                 if((httpStatus >= 200 && httpStatus < 300) || httpStatus === 1223 || xdrS){
 622                         responseObject = o.xdr ? o.r : this.createResponseObject(o, args);
 623                         if(callback && callback.success){
 624                                 if(!callback.scope){
 625                                         callback.success(responseObject);
 626                                         YAHOO.log('Success callback. HTTP code is ' + httpStatus, 'info', 'Connection');
 627                                 }
 628                                 else{
 629                                         // If a scope property is defined, the callback will be fired from
 630                                         // the context of the object.
 631                                         callback.success.apply(callback.scope, [responseObject]);
 632                                         YAHOO.log('Success callback with scope. HTTP code is ' + httpStatus, 'info', 'Connection');
 633                                 }
 634                         }
 635
 636                         // Fire global custom event -- successEvent
 637                         this.successEvent.fire(responseObject);
 638
 639                         if(o.successEvent){
 640                                 // Fire transaction custom event -- successEvent
 641                                 o.successEvent.fire(responseObject);
 642                         }
 643                 }
 644                 else{
 645                         switch(httpStatus){
 646                                 // The following cases are wininet.dll error codes that may be encountered.
 647                                 case 12002: // Server timeout
 648                                 case 12029: // 12029 to 12031 correspond to dropped connections.
 649                                 case 12030:
 650                                 case 12031:
 651                                 case 12152: // Connection closed by server.
 652                                 case 13030: // See above comments for variable status.
 653                                         // XDR transactions will not resolve to this case, since the
 654                                         // response object is already built in the xdr response.
 655                                         responseObject = this.createExceptionObject(o.tId, args, (isAbort?isAbort:false));
 656                                         if(callback && callback.failure){
 657                                                 if(!callback.scope){
 658                                                         callback.failure(responseObject);
 659                                                         YAHOO.log('Failure callback. Exception detected. Status code is ' + httpStatus, 'warn', 'Connection');
 660                                                 }
 661                                                 else{
 662                                                         callback.failure.apply(callback.scope, [responseObject]);
 663                                                         YAHOO.log('Failure callback with scope. Exception detected. Status code is ' + httpStatus, 'warn', 'Connection');
 664                                                 }
 665                                         }
 666
 667                                         break;
 668                                 default:
 669                                         responseObject = (o.xdr) ? o.response : this.createResponseObject(o, args);
 670                                         if(callback && callback.failure){
 671                                                 if(!callback.scope){
 672                                                         callback.failure(responseObject);
 673                                                         YAHOO.log('Failure callback. HTTP status code is ' + httpStatus, 'warn', 'Connection');
 674                                                 }
 675                                                 else{
 676                                                         callback.failure.apply(callback.scope, [responseObject]);
 677                                                         YAHOO.log('Failure callback with scope. HTTP status code is ' + httpStatus, 'warn', 'Connection');
 678                                                 }
 679                                         }
 680                         }
 681
 682                         // Fire global custom event -- failureEvent
 683                         this.failureEvent.fire(responseObject);
 684
 685                         if(o.failureEvent){
 686                                 // Fire transaction custom event -- failureEvent
 687                                 o.failureEvent.fire(responseObject);
 688                         }
 689
 690                 }
 691
 692                 this.releaseObject(o);
 693                 responseObject = null;
 694     },
 695
 696   /**
 697    * @description This method evaluates the server response, creates and returns the results via
 698    * its properties.  Success and failure cases will differ in the response
 699    * object's property values.
 700    * @method createResponseObject
 701    * @private
 702    * @static
 703    * @param {object} o The connection object
 704    * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
 705    * @return {object}
 706    */
 707     createResponseObject:function(o, callbackArg)
 708     {
 709                 var obj = {}, headerObj = {},
 710                         i, headerStr, header, delimitPos;
 711
 712                 try
 713                 {
 714                         headerStr = o.conn.getAllResponseHeaders();
 715                         header = headerStr.split('\n');
 716                         for(i=0; i<header.length; i++){
 717                                 delimitPos = header[i].indexOf(':');
 718                                 if(delimitPos != -1){
 719                                         headerObj[header[i].substring(0,delimitPos)] = YAHOO.lang.trim(header[i].substring(delimitPos+2));
 720                                 }
 721                         }
 722                 }
 723                 catch(e){}
 724
 725                 obj.tId = o.tId;
 726                 // Normalize IE's response to HTTP 204 when Win error 1223.
 727                 obj.status = (o.conn.status == 1223)?204:o.conn.status;
 728                 // Normalize IE's statusText to "No Content" instead of "Unknown".
 729                 obj.statusText = (o.conn.status == 1223)?"No Content":o.conn.statusText;
 730                 obj.getResponseHeader = headerObj;
 731                 obj.getAllResponseHeaders = headerStr;
 732                 obj.responseText = o.conn.responseText;
 733                 obj.responseXML = o.conn.responseXML;
 734
 735                 if(callbackArg){
 736                         obj.argument = callbackArg;
 737                 }
 738
 739                 return obj;
 740     },
 741
 742   /**
 743    * @description If a transaction cannot be completed due to dropped or closed connections,
 744    * there may be not be enough information to build a full response object.
 745    * The failure callback will be fired and this specific condition can be identified
 746    * by a status property value of 0.
 747    *
 748    * If an abort was successful, the status property will report a value of -1.
 749    *
 750    * @method createExceptionObject
 751    * @private
 752    * @static
 753    * @param {int} tId The Transaction Id
 754    * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
 755    * @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
 756    * @return {object}
 757    */
 758     createExceptionObject:function(tId, callbackArg, isAbort)
 759     {
 760                 var COMM_CODE = 0,
 761                         COMM_ERROR = 'communication failure',
 762                         ABORT_CODE = -1,
 763                         ABORT_ERROR = 'transaction aborted',
 764                         obj = {};
 765
 766                 obj.tId = tId;
 767                 if(isAbort){
 768                         obj.status = ABORT_CODE;
 769                         obj.statusText = ABORT_ERROR;
 770                 }
 771                 else{
 772                         obj.status = COMM_CODE;
 773                         obj.statusText = COMM_ERROR;
 774                 }
 775
 776                 if(callbackArg){
 777                         obj.argument = callbackArg;
 778                 }
 779
 780                 return obj;
 781     },
 782
 783   /**
 784    * @description Method that initializes the custom HTTP headers for the each transaction.
 785    * @method initHeader
 786    * @public
 787    * @static
 788    * @param {string} label The HTTP header label
 789    * @param {string} value The HTTP header value
 790    * @param {string} isDefault Determines if the specific header is a default header
 791    * automatically sent with each transaction.
 792    * @return {void}
 793    */
 794         initHeader:function(label, value, isDefault)
 795         {
 796                 var headerObj = (isDefault)?this._default_headers:this._http_headers;
 797
 798                 headerObj[label] = value;
 799                 if(isDefault){
 800                         this._has_default_headers = true;
 801                 }
 802                 else{
 803                         this._has_http_headers = true;
 804                 }
 805         },
 806
 807
 808   /**
 809    * @description Accessor that sets the HTTP headers for each transaction.
 810    * @method setHeader
 811    * @private
 812    * @static
 813    * @param {object} o The connection object for the transaction.
 814    * @return {void}
 815    */
 816         setHeader:function(o)
 817         {
 818                 var prop;
 819                 if(this._has_default_headers){
 820                         for(prop in this._default_headers){
 821                                 if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
 822                                         o.conn.setRequestHeader(prop, this._default_headers[prop]);
 823                                         YAHOO.log('Default HTTP header ' + prop + ' set with value of ' + this._default_headers[prop], 'info', 'Connection');
 824                                 }
 825                         }
 826                 }
 827
 828                 if(this._has_http_headers){
 829                         for(prop in this._http_headers){
 830                                 if(YAHOO.lang.hasOwnProperty(this._http_headers, prop)){
 831                                         o.conn.setRequestHeader(prop, this._http_headers[prop]);
 832                                         YAHOO.log('HTTP header ' + prop + ' set with value of ' + this._http_headers[prop], 'info', 'Connection');
 833                                 }
 834                         }
 835
 836                         this._http_headers = {};
 837                         this._has_http_headers = false;
 838                 }
 839         },
 840
 841   /**
 842    * @description Resets the default HTTP headers object
 843    * @method resetDefaultHeaders
 844    * @public
 845    * @static
 846    * @return {void}
 847    */
 848         resetDefaultHeaders:function(){
 849                 this._default_headers = {};
 850                 this._has_default_headers = false;
 851         },
 852
 853   /**
 854    * @description Method to terminate a transaction, if it has not reached readyState 4.
 855    * @method abort
 856    * @public
 857    * @static
 858    * @param {object} o The connection object returned by asyncRequest.
 859    * @param {object} callback  User-defined callback object.
 860    * @param {string} isTimeout boolean to indicate if abort resulted from a callback timeout.
 861    * @return {boolean}
 862    */
 863         abort:function(o, callback, isTimeout)
 864         {
 865                 var abortStatus,
 866                         args = (callback && callback.argument)?callback.argument:null;
 867                         o = o || {};
 868
 869                 if(o.conn){
 870                         if(o.xhr){
 871                                 if(this.isCallInProgress(o)){
 872                                         // Issue abort request
 873                                         o.conn.abort();
 874
 875                                         window.clearInterval(this._poll[o.tId]);
 876                                         delete this._poll[o.tId];
 877
 878                                         if(isTimeout){
 879                                                 window.clearTimeout(this._timeOut[o.tId]);
 880                                                 delete this._timeOut[o.tId];
 881                                         }
 882
 883                                         abortStatus = true;
 884                                 }
 885                         }
 886                         else if(o.xdr){
 887                                 o.conn.abort(o.tId);
 888                                 abortStatus = true;
 889                         }
 890                 }
 891                 else if(o.upload){
 892                         var frameId = 'yuiIO' + o.tId;
 893                         var io = document.getElementById(frameId);
 894
 895                         if(io){
 896                                 // Remove all listeners on the iframe prior to
 897                                 // its destruction.
 898                                 YAHOO.util.Event.removeListener(io, "load");
 899                                 // Destroy the iframe facilitating the transaction.
 900                                 document.body.removeChild(io);
 901                                 YAHOO.log('File upload iframe destroyed. Id is:' + frameId, 'info', 'Connection');
 902
 903                                 if(isTimeout){
 904                                         window.clearTimeout(this._timeOut[o.tId]);
 905                                         delete this._timeOut[o.tId];
 906                                 }
 907
 908                                 abortStatus = true;
 909                         }
 910                 }
 911                 else{
 912                         abortStatus = false;
 913                 }
 914
 915                 if(abortStatus === true){
 916                         // Fire global custom event -- abortEvent
 917                         this.abortEvent.fire(o, args);
 918
 919                         if(o.abortEvent){
 920                                 // Fire transaction custom event -- abortEvent
 921                                 o.abortEvent.fire(o, args);
 922                         }
 923
 924                         this.handleTransactionResponse(o, callback, true);
 925                         YAHOO.log('Transaction ' + o.tId + ' aborted.', 'info', 'Connection');
 926                 }
 927
 928                 return abortStatus;
 929         },
 930
 931   /**
 932    * @description Determines if the transaction is still being processed.
 933    * @method isCallInProgress
 934    * @public
 935    * @static
 936    * @param {object} o The connection object returned by asyncRequest
 937    * @return {boolean}
 938    */
 939         isCallInProgress:function(o)
 940         {
 941                 o = o || {};
 942                 // if the XHR object assigned to the transaction has not been dereferenced,
 943                 // then check its readyState status.  Otherwise, return false.
 944                 if(o.xhr && o.conn){
 945                         return o.conn.readyState !== 4 && o.conn.readyState !== 0;
 946                 }
 947                 else if(o.xdr && o.conn){
 948                         return o.conn.isCallInProgress(o.tId);
 949                 }
 950                 else if(o.upload === true){
 951                         return document.getElementById('yuiIO' + o.tId)?true:false;
 952                 }
 953                 else{
 954                         return false;
 955                 }
 956         },
 957
 958   /**
 959    * @description Dereference the XHR instance and the connection object after the transaction is completed.
 960    * @method releaseObject
 961    * @private
 962    * @static
 963    * @param {object} o The connection object
 964    * @return {void}
 965    */
 966         releaseObject:function(o)
 967         {
 968                 if(o && o.conn){
 969                         //dereference the XHR instance.
 970                         o.conn = null;
 971
 972                         YAHOO.log('Connection object for transaction ' + o.tId + ' destroyed.', 'info', 'Connection');
 973
 974                         //dereference the connection object.
 975                         o = null;
 976                 }
 977         }
 978 };
 979
 980 /**
 981   * @for Connect
 982   */
 983 (function() {
 984         var YCM = YAHOO.util.Connect, _fn = {};
 985
 986    /**
 987     * @description This method creates and instantiates the Flash transport.
 988     * @method _swf
 989     * @private
 990     * @static
 991     * @param {string} URI to connection.swf.
 992     * @return {void}
 993     */
 994         function _swf(uri) {
 995                 var o = '<object id="YUIConnectionSwf" type="application/x-shockwave-flash" data="' +
 996                         uri + '" width="0" height="0">' +
 997                         '<param name="movie" value="' + uri + '">' +
 998                 '<param name="allowScriptAccess" value="always">' +
 999                         '</object>',
1000                     c = document.createElement('div');
1001
1002                 document.body.appendChild(c);
1003                 c.innerHTML = o;
1004         }
1005
1006    /**
1007     * @description This method calls the public method on the
1008     * Flash transport to start the XDR transaction.  It is analogous
1009     * to Connection Manager's asyncRequest method.
1010     * @method xdr
1011     * @private
1012     * @static
1013     * @param {object} The transaction object.
1014     * @param {string} HTTP request method.
1015     * @param {string} URI for the transaction.
1016     * @param {object} The transaction's callback object.
1017     * @param {object} The JSON object used as HTTP POST data.
1018     * @return {void}
1019     */
1020         function _xdr(o, m, u, c, d) {
1021                 _fn[parseInt(o.tId)] = { 'o':o, 'c':c };
1022                 if (d) {
1023                         c.method = m;
1024                         c.data = d;
1025                 }
1026
1027                 o.conn.send(u, c, o.tId);
1028         }
1029
1030    /**
1031     * @description This method instantiates the Flash transport and
1032     * establishes a static reference to it, used for all XDR requests.
1033     * @method transport
1034     * @public
1035     * @static
1036     * @param {string} URI to connection.swf.
1037     * @return {void}
1038     */
1039         function _init(uri) {
1040                 _swf(uri);
1041                 YCM._transport = document.getElementById('YUIConnectionSwf');
1042         }
1043
1044         function _xdrReady() {
1045                 YCM.xdrReadyEvent.fire();
1046         }
1047
1048    /**
1049     * @description This method fires the global and transaction start
1050     * events.
1051     * @method _xdrStart
1052     * @private
1053     * @static
1054     * @param {object} The transaction object.
1055     * @param {string} The transaction's callback object.
1056     * @return {void}
1057     */
1058         function _xdrStart(o, cb) {
1059                 if (o) {
1060                         // Fire global custom event -- startEvent
1061                         YCM.startEvent.fire(o, cb.argument);
1062
1063                         if(o.startEvent){
1064                                 // Fire transaction custom event -- startEvent
1065                                 o.startEvent.fire(o, cb.argument);
1066                         }
1067                 }
1068         }
1069
1070    /**
1071     * @description This method is the initial response handler
1072     * for XDR transactions.  The Flash transport calls this
1073     * function and sends the response payload.
1074     * @method handleXdrResponse
1075     * @private
1076     * @static
1077     * @param {object} The response object sent from the Flash transport.
1078     * @return {void}
1079     */
1080         function _handleXdrResponse(r) {
1081                 var o = _fn[r.tId].o,
1082                         cb = _fn[r.tId].c;
1083
1084                 if (r.statusText === 'xdr:start') {
1085                         _xdrStart(o, cb);
1086                         return;
1087                 }
1088
1089                 r.responseText = decodeURI(r.responseText);
1090                 o.r = r;
1091                 if (cb.argument) {
1092                         o.r.argument = cb.argument;
1093                 }
1094
1095                 this.handleTransactionResponse(o, cb, r.statusText === 'xdr:abort' ? true : false);
1096                 delete _fn[r.tId];
1097         }
1098
1099         // Bind the functions to Connection Manager as static fields.
1100         YCM.xdr = _xdr;
1101         YCM.swf = _swf;
1102         YCM.transport = _init;
1103         YCM.xdrReadyEvent = new YAHOO.util.CustomEvent('xdrReady');
1104         YCM.xdrReady = _xdrReady;
1105         YCM.handleXdrResponse = _handleXdrResponse;
1106 })();
1107
1108 /**
1109   * @for Connect
1110   */
1111 (function(){
1112         var YCM = YAHOO.util.Connect,
1113                 YE = YAHOO.util.Event;
1114    /**
1115         * @description Property modified by setForm() to determine if the data
1116         * should be submitted as an HTML form.
1117         * @property _isFormSubmit
1118         * @private
1119         * @static
1120         * @type boolean
1121         */
1122         YCM._isFormSubmit = false;
1123
1124    /**
1125         * @description Property modified by setForm() to determine if a file(s)
1126         * upload is expected.
1127         * @property _isFileUpload
1128         * @private
1129         * @static
1130         * @type boolean
1131         */
1132         YCM._isFileUpload = false;
1133
1134    /**
1135         * @description Property modified by setForm() to set a reference to the HTML
1136         * form node if the desired action is file upload.
1137         * @property _formNode
1138         * @private
1139         * @static
1140         * @type object
1141         */
1142         YCM._formNode = null;
1143
1144    /**
1145         * @description Property modified by setForm() to set the HTML form data
1146         * for each transaction.
1147         * @property _sFormData
1148         * @private
1149         * @static
1150         * @type string
1151         */
1152         YCM._sFormData = null;
1153
1154    /**
1155         * @description Tracks the name-value pair of the "clicked" submit button if multiple submit
1156         * buttons are present in an HTML form; and, if YAHOO.util.Event is available.
1157         * @property _submitElementValue
1158         * @private
1159         * @static
1160         * @type string
1161         */
1162         YCM._submitElementValue = null;
1163
1164    /**
1165     * @description Custom event that fires when handleTransactionResponse() determines a
1166     * response in the HTTP 4xx/5xx range.
1167     * @property failureEvent
1168     * @private
1169     * @static
1170     * @type CustomEvent
1171     */
1172         YCM.uploadEvent = new YAHOO.util.CustomEvent('upload'),
1173
1174    /**
1175         * @description Determines whether YAHOO.util.Event is available and returns true or false.
1176         * If true, an event listener is bound at the document level to trap click events that
1177         * resolve to a target type of "Submit".  This listener will enable setForm() to determine
1178         * the clicked "Submit" value in a multi-Submit button, HTML form.
1179         * @property _hasSubmitListener
1180         * @private
1181         * @static
1182         */
1183         YCM._hasSubmitListener = function() {
1184                 if(YE){
1185                         YE.addListener(
1186                                 document,
1187                                 'click',
1188                                 function(e){
1189                                         var obj = YE.getTarget(e),
1190                                                 name = obj.nodeName.toLowerCase();
1191
1192                                         if((name === 'input' || name === 'button') && (obj.type && obj.type.toLowerCase() == 'submit')){
1193                                                 YCM._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
1194                                         }
1195                                 });
1196                         return true;
1197                 }
1198                 return false;
1199         }();
1200
1201   /**
1202    * @description This method assembles the form label and value pairs and
1203    * constructs an encoded string.
1204    * asyncRequest() will automatically initialize the transaction with a
1205    * a HTTP header Content-Type of application/x-www-form-urlencoded.
1206    * @method setForm
1207    * @public
1208    * @static
1209    * @param {string || object} form id or name attribute, or form object.
1210    * @param {boolean} optional enable file upload.
1211    * @param {boolean} optional enable file upload over SSL in IE only.
1212    * @return {string} string of the HTML form field name and value pairs..
1213    */
1214         function _setForm(formId, isUpload, secureUri)
1215         {
1216                 var oForm, oElement, oName, oValue, oDisabled,
1217                         hasSubmit = false,
1218                         data = [], item = 0,
1219                         i,len,j,jlen,opt;
1220
1221                 this.resetFormState();
1222
1223                 if(typeof formId == 'string'){
1224                         // Determine if the argument is a form id or a form name.
1225                         // Note form name usage is deprecated by supported
1226                         // here for legacy reasons.
1227                         oForm = (document.getElementById(formId) || document.forms[formId]);
1228                 }
1229                 else if(typeof formId == 'object'){
1230                         // Treat argument as an HTML form object.
1231                         oForm = formId;
1232                 }
1233                 else{
1234                         YAHOO.log('Unable to create form object ' + formId, 'warn', 'Connection');
1235                         return;
1236                 }
1237
1238                 // If the isUpload argument is true, setForm will call createFrame to initialize
1239                 // an iframe as the form target.
1240                 //
1241                 // The argument secureURI is also required by IE in SSL environments
1242                 // where the secureURI string is a fully qualified HTTP path, used to set the source
1243                 // of the iframe, to a stub resource in the same domain.
1244                 if(isUpload){
1245
1246                         // Create iframe in preparation for file upload.
1247                         this.createFrame(secureUri?secureUri:null);
1248
1249                         // Set form reference and file upload properties to true.
1250                         this._isFormSubmit = true;
1251                         this._isFileUpload = true;
1252                         this._formNode = oForm;
1253
1254                         return;
1255                 }
1256
1257                 // Iterate over the form elements collection to construct the
1258                 // label-value pairs.
1259                 for (i=0,len=oForm.elements.length; i<len; ++i){
1260                         oElement  = oForm.elements[i];
1261                         oDisabled = oElement.disabled;
1262                         oName     = oElement.name;
1263
1264                         // Do not submit fields that are disabled or
1265                         // do not have a name attribute value.
1266                         if(!oDisabled && oName)
1267                         {
1268                                 oName  = encodeURIComponent(oName)+'=';
1269                                 oValue = encodeURIComponent(oElement.value);
1270
1271                                 switch(oElement.type)
1272                                 {
1273                                         // Safari, Opera, FF all default opt.value from .text if
1274                                         // value attribute not specified in markup
1275                                         case 'select-one':
1276                                                 if (oElement.selectedIndex > -1) {
1277                                                         opt = oElement.options[oElement.selectedIndex];
1278                                                         data[item++] = oName + encodeURIComponent(
1279                                                                 (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
1280                                                 }
1281                                                 break;
1282                                         case 'select-multiple':
1283                                                 if (oElement.selectedIndex > -1) {
1284                                                         for(j=oElement.selectedIndex, jlen=oElement.options.length; j<jlen; ++j){
1285                                                                 opt = oElement.options[j];
1286                                                                 if (opt.selected) {
1287                                                                         data[item++] = oName + encodeURIComponent(
1288                                                                                 (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
1289                                                                 }
1290                                                         }
1291                                                 }
1292                                                 break;
1293                                         case 'radio':
1294                                         case 'checkbox':
1295                                                 if(oElement.checked){
1296                                                         data[item++] = oName + oValue;
1297                                                 }
1298                                                 break;
1299                                         case 'file':
1300                                                 // stub case as XMLHttpRequest will only send the file path as a string.
1301                                         case undefined:
1302                                                 // stub case for fieldset element which returns undefined.
1303                                         case 'reset':
1304                                                 // stub case for input type reset button.
1305                                         case 'button':
1306                                                 // stub case for input type button elements.
1307                                                 break;
1308                                         case 'submit':
1309                                                 if(hasSubmit === false){
1310                                                         if(this._hasSubmitListener && this._submitElementValue){
1311                                                                 data[item++] = this._submitElementValue;
1312                                                         }
1313                                                         hasSubmit = true;
1314                                                 }
1315                                                 break;
1316                                         default:
1317                                                 data[item++] = oName + oValue;
1318                                 }
1319                         }
1320                 }
1321
1322                 this._isFormSubmit = true;
1323                 this._sFormData = data.join('&');
1324
1325                 YAHOO.log('Form initialized for transaction. HTML form POST message is: ' + this._sFormData, 'info', 'Connection');
1326
1327                 this.initHeader('Content-Type', this._default_form_header);
1328                 YAHOO.log('Initialize header Content-Type to application/x-www-form-urlencoded for setForm() transaction.', 'info', 'Connection');
1329
1330                 return this._sFormData;
1331         }
1332
1333    /**
1334     * @description Resets HTML form properties when an HTML form or HTML form
1335     * with file upload transaction is sent.
1336     * @method resetFormState
1337     * @private
1338     * @static
1339     * @return {void}
1340     */
1341         function _resetFormState(){
1342                 this._isFormSubmit = false;
1343                 this._isFileUpload = false;
1344                 this._formNode = null;
1345                 this._sFormData = "";
1346         }
1347
1348
1349    /**
1350     * @description Creates an iframe to be used for form file uploads.  It is remove from the
1351     * document upon completion of the upload transaction.
1352     * @method createFrame
1353     * @private
1354     * @static
1355     * @param {string} optional qualified path of iframe resource for SSL in IE.
1356     * @return {void}
1357     */
1358         function _createFrame(secureUri){
1359
1360                 // IE does not allow the setting of id and name attributes as object
1361                 // properties via createElement().  A different iframe creation
1362                 // pattern is required for IE.
1363                 var frameId = 'yuiIO' + this._transaction_id,
1364                         io;
1365                 if(YAHOO.env.ua.ie){
1366                         io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
1367
1368                         // IE will throw a security exception in an SSL environment if the
1369                         // iframe source is undefined.
1370                         if(typeof secureUri == 'boolean'){
1371                                 io.src = 'javascript:false';
1372                         }
1373                 }
1374                 else{
1375                         io = document.createElement('iframe');
1376                         io.id = frameId;
1377                         io.name = frameId;
1378                 }
1379
1380                 io.style.position = 'absolute';
1381                 io.style.top = '-1000px';
1382                 io.style.left = '-1000px';
1383
1384                 document.body.appendChild(io);
1385                 YAHOO.log('File upload iframe created. Id is:' + frameId, 'info', 'Connection');
1386         }
1387
1388    /**
1389     * @description Parses the POST data and creates hidden form elements
1390     * for each key-value, and appends them to the HTML form object.
1391     * @method appendPostData
1392     * @private
1393     * @static
1394     * @param {string} postData The HTTP POST data
1395     * @return {array} formElements Collection of hidden fields.
1396     */
1397         function _appendPostData(postData){
1398                 var formElements = [],
1399                         postMessage = postData.split('&'),
1400                         i, delimitPos;
1401
1402                 for(i=0; i < postMessage.length; i++){
1403                         delimitPos = postMessage[i].indexOf('=');
1404                         if(delimitPos != -1){
1405                                 formElements[i] = document.createElement('input');
1406                                 formElements[i].type = 'hidden';
1407                                 formElements[i].name = decodeURIComponent(postMessage[i].substring(0,delimitPos));
1408                                 formElements[i].value = decodeURIComponent(postMessage[i].substring(delimitPos+1));
1409                                 this._formNode.appendChild(formElements[i]);
1410                         }
1411                 }
1412
1413                 return formElements;
1414         }
1415
1416    /**
1417     * @description Uploads HTML form, inclusive of files/attachments, using the
1418     * iframe created in createFrame to facilitate the transaction.
1419     * @method uploadFile
1420     * @private
1421     * @static
1422     * @param {int} id The transaction id.
1423     * @param {object} callback User-defined callback object.
1424     * @param {string} uri Fully qualified path of resource.
1425     * @param {string} postData POST data to be submitted in addition to HTML form.
1426     * @return {void}
1427     */
1428         function _uploadFile(o, callback, uri, postData){
1429                 // Each iframe has an id prefix of "yuiIO" followed
1430                 // by the unique transaction id.
1431                 var frameId = 'yuiIO' + o.tId,
1432                     uploadEncoding = 'multipart/form-data',
1433                     io = document.getElementById(frameId),
1434                     ie8 = (document.documentMode && document.documentMode === 8) ? true : false,
1435                     oConn = this,
1436                         args = (callback && callback.argument)?callback.argument:null,
1437             oElements,i,prop,obj, rawFormAttributes, uploadCallback;
1438
1439                 // Track original HTML form attribute values.
1440                 rawFormAttributes = {
1441                         action:this._formNode.getAttribute('action'),
1442                         method:this._formNode.getAttribute('method'),
1443                         target:this._formNode.getAttribute('target')
1444                 };
1445
1446                 // Initialize the HTML form properties in case they are
1447                 // not defined in the HTML form.
1448                 this._formNode.setAttribute('action', uri);
1449                 this._formNode.setAttribute('method', 'POST');
1450                 this._formNode.setAttribute('target', frameId);
1451
1452                 if(YAHOO.env.ua.ie && !ie8){
1453                         // IE does not respect property enctype for HTML forms.
1454                         // Instead it uses the property - "encoding".
1455                         this._formNode.setAttribute('encoding', uploadEncoding);
1456                 }
1457                 else{
1458                         this._formNode.setAttribute('enctype', uploadEncoding);
1459                 }
1460
1461                 if(postData){
1462                         oElements = this.appendPostData(postData);
1463                 }
1464
1465                 // Start file upload.
1466                 this._formNode.submit();
1467
1468                 // Fire global custom event -- startEvent
1469                 this.startEvent.fire(o, args);
1470
1471                 if(o.startEvent){
1472                         // Fire transaction custom event -- startEvent
1473                         o.startEvent.fire(o, args);
1474                 }
1475
1476                 // Start polling if a callback is present and the timeout
1477                 // property has been defined.
1478                 if(callback && callback.timeout){
1479                         this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
1480                 }
1481
1482                 // Remove HTML elements created by appendPostData
1483                 if(oElements && oElements.length > 0){
1484                         for(i=0; i < oElements.length; i++){
1485                                 this._formNode.removeChild(oElements[i]);
1486                         }
1487                 }
1488
1489                 // Restore HTML form attributes to their original
1490                 // values prior to file upload.
1491                 for(prop in rawFormAttributes){
1492                         if(YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)){
1493                                 if(rawFormAttributes[prop]){
1494                                         this._formNode.setAttribute(prop, rawFormAttributes[prop]);
1495                                 }
1496                                 else{
1497                                         this._formNode.removeAttribute(prop);
1498                                 }
1499                         }
1500                 }
1501
1502                 // Reset HTML form state properties.
1503                 this.resetFormState();
1504
1505                 // Create the upload callback handler that fires when the iframe
1506                 // receives the load event.  Subsequently, the event handler is detached
1507                 // and the iframe removed from the document.
1508                 uploadCallback = function() {
1509                         if(callback && callback.timeout){
1510                                 window.clearTimeout(oConn._timeOut[o.tId]);
1511                                 delete oConn._timeOut[o.tId];
1512                         }
1513
1514                         // Fire global custom event -- completeEvent
1515                         oConn.completeEvent.fire(o, args);
1516
1517                         if(o.completeEvent){
1518                                 // Fire transaction custom event -- completeEvent
1519                                 o.completeEvent.fire(o, args);
1520                         }
1521
1522                         obj = {
1523                             tId : o.tId,
1524                             argument : callback.argument
1525             };
1526
1527                         try
1528                         {
1529                                 // responseText and responseXML will be populated with the same data from the iframe.
1530                                 // Since the HTTP headers cannot be read from the iframe
1531                                 obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:io.contentWindow.document.documentElement.textContent;
1532                                 obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
1533                         }
1534                         catch(e){}
1535
1536                         if(callback && callback.upload){
1537                                 if(!callback.scope){
1538                                         callback.upload(obj);
1539                                         YAHOO.log('Upload callback.', 'info', 'Connection');
1540                                 }
1541                                 else{
1542                                         callback.upload.apply(callback.scope, [obj]);
1543                                         YAHOO.log('Upload callback with scope.', 'info', 'Connection');
1544                                 }
1545                         }
1546
1547                         // Fire global custom event -- uploadEvent
1548                         oConn.uploadEvent.fire(obj);
1549
1550                         if(o.uploadEvent){
1551                                 // Fire transaction custom event -- uploadEvent
1552                                 o.uploadEvent.fire(obj);
1553                         }
1554
1555                         YE.removeListener(io, "load", uploadCallback);
1556
1557                         setTimeout(
1558                                 function(){
1559                                         document.body.removeChild(io);
1560                                         oConn.releaseObject(o);
1561                                         YAHOO.log('File upload iframe destroyed. Id is:' + frameId, 'info', 'Connection');
1562                                 }, 100);
1563                 };
1564
1565                 // Bind the onload handler to the iframe to detect the file upload response.
1566                 YE.addListener(io, "load", uploadCallback);
1567         }
1568
1569         YCM.setForm = _setForm;
1570         YCM.resetFormState = _resetFormState;
1571         YCM.createFrame = _createFrame;
1572         YCM.appendPostData = _appendPostData;
1573         YCM.uploadFile = _uploadFile;
1574 })();
1575
1576 YAHOO.register("connection", YAHOO.util.Connect, {version: "2.8.0r4", build: "2449"});