-/*
-Copyright (c) 2009, Yahoo! Inc. All rights reserved.
-Code licensed under the BSD License:
-http://developer.yahoo.net/yui/license.txt
-version: 2.7.0
-*/
-/**
- * The Connection Manager provides a simplified interface to the XMLHttpRequest
- * object. It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
- * interactive states and server response, returning the results to a pre-defined
- * callback you create.
- *
- * @namespace YAHOO.util
- * @module connection
- * @requires yahoo
- * @requires event
- */
-
-/**
- * The Connection Manager singleton provides methods for creating and managing
- * asynchronous transactions.
- *
- * @class Connect
- */
-
-YAHOO.util.Connect =
-{
- /**
- * @description Array of MSFT ActiveX ids for XMLHttpRequest.
- * @property _msxml_progid
- * @private
- * @static
- * @type array
- */
- _msxml_progid:[
- 'Microsoft.XMLHTTP',
- 'MSXML2.XMLHTTP.3.0',
- 'MSXML2.XMLHTTP'
- ],
-
- /**
- * @description Object literal of HTTP header(s)
- * @property _http_header
- * @private
- * @static
- * @type object
- */
- _http_headers:{},
-
- /**
- * @description Determines if HTTP headers are set.
- * @property _has_http_headers
- * @private
- * @static
- * @type boolean
- */
- _has_http_headers:false,
-
- /**
- * @description Determines if a default header of
- * Content-Type of 'application/x-www-form-urlencoded'
- * will be added to any client HTTP headers sent for POST
- * transactions.
- * @property _use_default_post_header
- * @private
- * @static
- * @type boolean
- */
- _use_default_post_header:true,
-
- /**
- * @description The default header used for POST transactions.
- * @property _default_post_header
- * @private
- * @static
- * @type boolean
- */
- _default_post_header:'application/x-www-form-urlencoded; charset=UTF-8',
-
- /**
- * @description The default header used for transactions involving the
- * use of HTML forms.
- * @property _default_form_header
- * @private
- * @static
- * @type boolean
- */
- _default_form_header:'application/x-www-form-urlencoded',
-
- /**
- * @description Determines if a default header of
- * 'X-Requested-With: XMLHttpRequest'
- * will be added to each transaction.
- * @property _use_default_xhr_header
- * @private
- * @static
- * @type boolean
- */
- _use_default_xhr_header:true,
-
- /**
- * @description The default header value for the label
- * "X-Requested-With". This is sent with each
- * transaction, by default, to identify the
- * request as being made by YUI Connection Manager.
- * @property _default_xhr_header
- * @private
- * @static
- * @type boolean
- */
- _default_xhr_header:'XMLHttpRequest',
-
- /**
- * @description Determines if custom, default headers
- * are set for each transaction.
- * @property _has_default_header
- * @private
- * @static
- * @type boolean
- */
- _has_default_headers:true,
-
- /**
- * @description Determines if custom, default headers
- * are set for each transaction.
- * @property _has_default_header
- * @private
- * @static
- * @type boolean
- */
- _default_headers:{},
-
- /**
- * @description Property modified by setForm() to determine if the data
- * should be submitted as an HTML form.
- * @property _isFormSubmit
- * @private
- * @static
- * @type boolean
- */
- _isFormSubmit:false,
-
- /**
- * @description Property modified by setForm() to determine if a file(s)
- * upload is expected.
- * @property _isFileUpload
- * @private
- * @static
- * @type boolean
- */
- _isFileUpload:false,
-
- /**
- * @description Property modified by setForm() to set a reference to the HTML
- * form node if the desired action is file upload.
- * @property _formNode
- * @private
- * @static
- * @type object
- */
- _formNode:null,
-
- /**
- * @description Property modified by setForm() to set the HTML form data
- * for each transaction.
- * @property _sFormData
- * @private
- * @static
- * @type string
- */
- _sFormData:null,
-
- /**
- * @description Collection of polling references to the polling mechanism in handleReadyState.
- * @property _poll
- * @private
- * @static
- * @type object
- */
- _poll:{},
-
- /**
- * @description Queue of timeout values for each transaction callback with a defined timeout value.
- * @property _timeOut
- * @private
- * @static
- * @type object
- */
- _timeOut:{},
-
- /**
- * @description The polling frequency, in milliseconds, for HandleReadyState.
- * when attempting to determine a transaction's XHR readyState.
- * The default is 50 milliseconds.
- * @property _polling_interval
- * @private
- * @static
- * @type int
- */
- _polling_interval:50,
-
- /**
- * @description A transaction counter that increments the transaction id for each transaction.
- * @property _transaction_id
- * @private
- * @static
- * @type int
- */
- _transaction_id:0,
-
- /**
- * @description Tracks the name-value pair of the "clicked" submit button if multiple submit
- * buttons are present in an HTML form; and, if YAHOO.util.Event is available.
- * @property _submitElementValue
- * @private
- * @static
- * @type string
- */
- _submitElementValue:null,
-
- /**
- * @description Determines whether YAHOO.util.Event is available and returns true or false.
- * If true, an event listener is bound at the document level to trap click events that
- * resolve to a target type of "Submit". This listener will enable setForm() to determine
- * the clicked "Submit" value in a multi-Submit button, HTML form.
- * @property _hasSubmitListener
- * @private
- * @static
- */
- _hasSubmitListener:(function()
- {
- if(YAHOO.util.Event){
- YAHOO.util.Event.addListener(
- document,
- 'click',
- function(e){
- var obj = YAHOO.util.Event.getTarget(e),
- name = obj.nodeName.toLowerCase();
- if((name === 'input' || name === 'button') && (obj.type && obj.type.toLowerCase() == 'submit')){
- YAHOO.util.Connect._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
- }
- });
- return true;
- }
- return false;
- })(),
-
- /**
- * @description Custom event that fires at the start of a transaction
- * @property startEvent
- * @private
- * @static
- * @type CustomEvent
- */
- startEvent: new YAHOO.util.CustomEvent('start'),
-
- /**
- * @description Custom event that fires when a transaction response has completed.
- * @property completeEvent
- * @private
- * @static
- * @type CustomEvent
- */
- completeEvent: new YAHOO.util.CustomEvent('complete'),
-
- /**
- * @description Custom event that fires when handleTransactionResponse() determines a
- * response in the HTTP 2xx range.
- * @property successEvent
- * @private
- * @static
- * @type CustomEvent
- */
- successEvent: new YAHOO.util.CustomEvent('success'),
-
- /**
- * @description Custom event that fires when handleTransactionResponse() determines a
- * response in the HTTP 4xx/5xx range.
- * @property failureEvent
- * @private
- * @static
- * @type CustomEvent
- */
- failureEvent: new YAHOO.util.CustomEvent('failure'),
-
- /**
- * @description Custom event that fires when handleTransactionResponse() determines a
- * response in the HTTP 4xx/5xx range.
- * @property failureEvent
- * @private
- * @static
- * @type CustomEvent
- */
- uploadEvent: new YAHOO.util.CustomEvent('upload'),
-
- /**
- * @description Custom event that fires when a transaction is successfully aborted.
- * @property abortEvent
- * @private
- * @static
- * @type CustomEvent
- */
- abortEvent: new YAHOO.util.CustomEvent('abort'),
-
- /**
- * @description A reference table that maps callback custom events members to its specific
- * event name.
- * @property _customEvents
- * @private
- * @static
- * @type object
- */
- _customEvents:
- {
- onStart:['startEvent', 'start'],
- onComplete:['completeEvent', 'complete'],
- onSuccess:['successEvent', 'success'],
- onFailure:['failureEvent', 'failure'],
- onUpload:['uploadEvent', 'upload'],
- onAbort:['abortEvent', 'abort']
- },
-
- /**
- * @description Member to add an ActiveX id to the existing xml_progid array.
- * In the event(unlikely) a new ActiveX id is introduced, it can be added
- * without internal code modifications.
- * @method setProgId
- * @public
- * @static
- * @param {string} id The ActiveX id to be added to initialize the XHR object.
- * @return void
- */
- setProgId:function(id)
- {
- this._msxml_progid.unshift(id);
- },
-
- /**
- * @description Member to override the default POST header.
- * @method setDefaultPostHeader
- * @public
- * @static
- * @param {boolean} b Set and use default header - true or false .
- * @return void
- */
- setDefaultPostHeader:function(b)
- {
- if(typeof b == 'string'){
- this._default_post_header = b;
- }
- else if(typeof b == 'boolean'){
- this._use_default_post_header = b;
- }
- },
-
- /**
- * @description Member to override the default transaction header..
- * @method setDefaultXhrHeader
- * @public
- * @static
- * @param {boolean} b Set and use default header - true or false .
- * @return void
- */
- setDefaultXhrHeader:function(b)
- {
- if(typeof b == 'string'){
- this._default_xhr_header = b;
- }
- else{
- this._use_default_xhr_header = b;
- }
- },
-
- /**
- * @description Member to modify the default polling interval.
- * @method setPollingInterval
- * @public
- * @static
- * @param {int} i The polling interval in milliseconds.
- * @return void
- */
- setPollingInterval:function(i)
- {
- if(typeof i == 'number' && isFinite(i)){
- this._polling_interval = i;
- }
- },
-
- /**
- * @description Instantiates a XMLHttpRequest object and returns an object with two properties:
- * the XMLHttpRequest instance and the transaction id.
- * @method createXhrObject
- * @private
- * @static
- * @param {int} transactionId Property containing the transaction id for this transaction.
- * @return object
- */
- createXhrObject:function(transactionId)
- {
- var obj,http;
- try
- {
- // Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
- http = new XMLHttpRequest();
- // Object literal with http and tId properties
- obj = { conn:http, tId:transactionId };
- }
- catch(e)
- {
- for(var i=0; i<this._msxml_progid.length; ++i){
- try
- {
- // Instantiates XMLHttpRequest for IE and assign to http
- http = new ActiveXObject(this._msxml_progid[i]);
- // Object literal with conn and tId properties
- obj = { conn:http, tId:transactionId };
- break;
- }
- catch(e2){}
- }
- }
- finally
- {
- return obj;
- }
- },
-
- /**
- * @description This method is called by asyncRequest to create a
- * valid connection object for the transaction. It also passes a
- * transaction id and increments the transaction id counter.
- * @method getConnectionObject
- * @private
- * @static
- * @return {object}
- */
- getConnectionObject:function(isFileUpload)
- {
- var o;
- var tId = this._transaction_id;
-
- try
- {
- if(!isFileUpload){
- o = this.createXhrObject(tId);
- }
- else{
- o = {};
- o.tId = tId;
- o.isUpload = true;
- }
-
- if(o){
- this._transaction_id++;
- }
- }
- catch(e){}
- finally
- {
- return o;
- }
- },
-
- /**
- * @description Method for initiating an asynchronous request via the XHR object.
- * @method asyncRequest
- * @public
- * @static
- * @param {string} method HTTP transaction method
- * @param {string} uri Fully qualified path of resource
- * @param {callback} callback User-defined callback function or object
- * @param {string} postData POST body
- * @return {object} Returns the connection object
- */
- asyncRequest:function(method, uri, callback, postData)
- {
- var o = (this._isFileUpload)?this.getConnectionObject(true):this.getConnectionObject();
- var args = (callback && callback.argument)?callback.argument:null;
-
- if(!o){
- return null;
- }
- else{
-
- // Intialize any transaction-specific custom events, if provided.
- if(callback && callback.customevents){
- this.initCustomEvents(o, callback);
- }
-
- if(this._isFormSubmit){
- if(this._isFileUpload){
- this.uploadFile(o, callback, uri, postData);
- return o;
- }
-
- // If the specified HTTP method is GET, setForm() will return an
- // encoded string that is concatenated to the uri to
- // create a querystring.
- if(method.toUpperCase() == 'GET'){
- if(this._sFormData.length !== 0){
- // If the URI already contains a querystring, append an ampersand
- // and then concatenate _sFormData to the URI.
- uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
- }
- }
- else if(method.toUpperCase() == 'POST'){
- // If POST data exist in addition to the HTML form data,
- // it will be concatenated to the form data.
- postData = postData?this._sFormData + "&" + postData:this._sFormData;
- }
- }
-
- if(method.toUpperCase() == 'GET' && (callback && callback.cache === false)){
- // If callback.cache is defined and set to false, a
- // timestamp value will be added to the querystring.
- uri += ((uri.indexOf('?') == -1)?'?':'&') + "rnd=" + new Date().valueOf().toString();
- }
-
- o.conn.open(method, uri, true);
-
- // Each transaction will automatically include a custom header of
- // "X-Requested-With: XMLHttpRequest" to identify the request as
- // having originated from Connection Manager.
- if(this._use_default_xhr_header){
- if(!this._default_headers['X-Requested-With']){
- this.initHeader('X-Requested-With', this._default_xhr_header, true);
- }
- }
-
- //If the transaction method is POST and the POST header value is set to true
- //or a custom value, initalize the Content-Type header to this value.
- if((method.toUpperCase() === 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
- this.initHeader('Content-Type', this._default_post_header);
- }
-
- //Initialize all default and custom HTTP headers,
- if(this._has_default_headers || this._has_http_headers){
- this.setHeader(o);
- }
-
- this.handleReadyState(o, callback);
- o.conn.send(postData || '');
-
-
- // Reset the HTML form data and state properties as
- // soon as the data are submitted.
- if(this._isFormSubmit === true){
- this.resetFormState();
- }
-
- // Fire global custom event -- startEvent
- this.startEvent.fire(o, args);
-
- if(o.startEvent){
- // Fire transaction custom event -- startEvent
- o.startEvent.fire(o, args);
- }
-
- return o;
- }
- },
-
- /**
- * @description This method creates and subscribes custom events,
- * specific to each transaction
- * @method initCustomEvents
- * @private
- * @static
- * @param {object} o The connection object
- * @param {callback} callback The user-defined callback object
- * @return {void}
- */
- initCustomEvents:function(o, callback)
- {
- var prop;
- // Enumerate through callback.customevents members and bind/subscribe
- // events that match in the _customEvents table.
- for(prop in callback.customevents){
- if(this._customEvents[prop][0]){
- // Create the custom event
- o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope)?callback.scope:null);
-
- // Subscribe the custom event
- o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
- }
- }
- },
-
- /**
- * @description This method serves as a timer that polls the XHR object's readyState
- * property during a transaction, instead of binding a callback to the
- * onreadystatechange event. Upon readyState 4, handleTransactionResponse
- * will process the response, and the timer will be cleared.
- * @method handleReadyState
- * @private
- * @static
- * @param {object} o The connection object
- * @param {callback} callback The user-defined callback object
- * @return {void}
- */
-
- handleReadyState:function(o, callback)
-
- {
- var oConn = this;
- var args = (callback && callback.argument)?callback.argument:null;
-
- if(callback && callback.timeout){
- this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
- }
-
- this._poll[o.tId] = window.setInterval(
- function(){
- if(o.conn && o.conn.readyState === 4){
-
- // Clear the polling interval for the transaction
- // and remove the reference from _poll.
- window.clearInterval(oConn._poll[o.tId]);
- delete oConn._poll[o.tId];
-
- if(callback && callback.timeout){
- window.clearTimeout(oConn._timeOut[o.tId]);
- delete oConn._timeOut[o.tId];
- }
-
- // Fire global custom event -- completeEvent
- oConn.completeEvent.fire(o, args);
-
- if(o.completeEvent){
- // Fire transaction custom event -- completeEvent
- o.completeEvent.fire(o, args);
- }
-
- oConn.handleTransactionResponse(o, callback);
- }
- }
- ,this._polling_interval);
- },
-
- /**
- * @description This method attempts to interpret the server response and
- * determine whether the transaction was successful, or if an error or
- * exception was encountered.
- * @method handleTransactionResponse
- * @private
- * @static
- * @param {object} o The connection object
- * @param {object} callback The user-defined callback object
- * @param {boolean} isAbort Determines if the transaction was terminated via abort().
- * @return {void}
- */
- handleTransactionResponse:function(o, callback, isAbort)
- {
- var httpStatus, responseObject;
- var args = (callback && callback.argument)?callback.argument:null;
-
- try
- {
- if(o.conn.status !== undefined && o.conn.status !== 0){
- httpStatus = o.conn.status;
- }
- else{
- httpStatus = 13030;
- }
- }
- catch(e){
-
- // 13030 is a custom code to indicate the condition -- in Mozilla/FF --
- // when the XHR object's status and statusText properties are
- // unavailable, and a query attempt throws an exception.
- httpStatus = 13030;
- }
-
- if(httpStatus >= 200 && httpStatus < 300 || httpStatus === 1223){
- responseObject = this.createResponseObject(o, args);
- if(callback && callback.success){
- if(!callback.scope){
- callback.success(responseObject);
- }
- else{
- // If a scope property is defined, the callback will be fired from
- // the context of the object.
- callback.success.apply(callback.scope, [responseObject]);
- }
- }
-
- // Fire global custom event -- successEvent
- this.successEvent.fire(responseObject);
-
- if(o.successEvent){
- // Fire transaction custom event -- successEvent
- o.successEvent.fire(responseObject);
- }
- }
- else{
- switch(httpStatus){
- // The following cases are wininet.dll error codes that may be encountered.
- case 12002: // Server timeout
- case 12029: // 12029 to 12031 correspond to dropped connections.
- case 12030:
- case 12031:
- case 12152: // Connection closed by server.
- case 13030: // See above comments for variable status.
- responseObject = this.createExceptionObject(o.tId, args, (isAbort?isAbort:false));
- if(callback && callback.failure){
- if(!callback.scope){
- callback.failure(responseObject);
- }
- else{
- callback.failure.apply(callback.scope, [responseObject]);
- }
- }
-
- break;
- default:
- responseObject = this.createResponseObject(o, args);
- if(callback && callback.failure){
- if(!callback.scope){
- callback.failure(responseObject);
- }
- else{
- callback.failure.apply(callback.scope, [responseObject]);
- }
- }
- }
-
- // Fire global custom event -- failureEvent
- this.failureEvent.fire(responseObject);
-
- if(o.failureEvent){
- // Fire transaction custom event -- failureEvent
- o.failureEvent.fire(responseObject);
- }
-
- }
-
- this.releaseObject(o);
- responseObject = null;
- },
-
- /**
- * @description This method evaluates the server response, creates and returns the results via
- * its properties. Success and failure cases will differ in the response
- * object's property values.
- * @method createResponseObject
- * @private
- * @static
- * @param {object} o The connection object
- * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
- * @return {object}
- */
- createResponseObject:function(o, callbackArg)
- {
- var obj = {};
- var headerObj = {};
-
- try
- {
- var headerStr = o.conn.getAllResponseHeaders();
- var header = headerStr.split('\n');
- for(var i=0; i<header.length; i++){
- var delimitPos = header[i].indexOf(':');
- if(delimitPos != -1){
- headerObj[header[i].substring(0,delimitPos)] = header[i].substring(delimitPos+2);
- }
- }
- }
- catch(e){}
-
- obj.tId = o.tId;
- // Normalize IE's response to HTTP 204 when Win error 1223.
- obj.status = (o.conn.status == 1223)?204:o.conn.status;
- // Normalize IE's statusText to "No Content" instead of "Unknown".
- obj.statusText = (o.conn.status == 1223)?"No Content":o.conn.statusText;
- obj.getResponseHeader = headerObj;
- obj.getAllResponseHeaders = headerStr;
- obj.responseText = o.conn.responseText;
- obj.responseXML = o.conn.responseXML;
-
- if(callbackArg){
- obj.argument = callbackArg;
- }
-
- return obj;
- },
-
- /**
- * @description If a transaction cannot be completed due to dropped or closed connections,
- * there may be not be enough information to build a full response object.
- * The failure callback will be fired and this specific condition can be identified
- * by a status property value of 0.
- *
- * If an abort was successful, the status property will report a value of -1.
- *
- * @method createExceptionObject
- * @private
- * @static
- * @param {int} tId The Transaction Id
- * @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
- * @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
- * @return {object}
- */
- createExceptionObject:function(tId, callbackArg, isAbort)
- {
- var COMM_CODE = 0;
- var COMM_ERROR = 'communication failure';
- var ABORT_CODE = -1;
- var ABORT_ERROR = 'transaction aborted';
-
- var obj = {};
-
- obj.tId = tId;
- if(isAbort){
- obj.status = ABORT_CODE;
- obj.statusText = ABORT_ERROR;
- }
- else{
- obj.status = COMM_CODE;
- obj.statusText = COMM_ERROR;
- }
-
- if(callbackArg){
- obj.argument = callbackArg;
- }
-
- return obj;
- },
-
- /**
- * @description Method that initializes the custom HTTP headers for the each transaction.
- * @method initHeader
- * @public
- * @static
- * @param {string} label The HTTP header label
- * @param {string} value The HTTP header value
- * @param {string} isDefault Determines if the specific header is a default header
- * automatically sent with each transaction.
- * @return {void}
- */
- initHeader:function(label, value, isDefault)
- {
- var headerObj = (isDefault)?this._default_headers:this._http_headers;
- headerObj[label] = value;
-
- if(isDefault){
- this._has_default_headers = true;
- }
- else{
- this._has_http_headers = true;
- }
- },
-
-
- /**
- * @description Accessor that sets the HTTP headers for each transaction.
- * @method setHeader
- * @private
- * @static
- * @param {object} o The connection object for the transaction.
- * @return {void}
- */
- setHeader:function(o)
- {
- var prop;
- if(this._has_default_headers){
- for(prop in this._default_headers){
- if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
- o.conn.setRequestHeader(prop, this._default_headers[prop]);
- }
- }
- }
-
- if(this._has_http_headers){
- for(prop in this._http_headers){
- if(YAHOO.lang.hasOwnProperty(this._http_headers, prop)){
- o.conn.setRequestHeader(prop, this._http_headers[prop]);
- }
- }
- delete this._http_headers;
-
- this._http_headers = {};
- this._has_http_headers = false;
- }
- },
-
- /**
- * @description Resets the default HTTP headers object
- * @method resetDefaultHeaders
- * @public
- * @static
- * @return {void}
- */
- resetDefaultHeaders:function(){
- delete this._default_headers;
- this._default_headers = {};
- this._has_default_headers = false;
- },
-
- /**
- * @description This method assembles the form label and value pairs and
- * constructs an encoded string.
- * asyncRequest() will automatically initialize the transaction with a
- * a HTTP header Content-Type of application/x-www-form-urlencoded.
- * @method setForm
- * @public
- * @static
- * @param {string || object} form id or name attribute, or form object.
- * @param {boolean} optional enable file upload.
- * @param {boolean} optional enable file upload over SSL in IE only.
- * @return {string} string of the HTML form field name and value pairs..
- */
- setForm:function(formId, isUpload, secureUri)
- {
- var oForm, oElement, oName, oValue, oDisabled,
- hasSubmit = false,
- data = [], item = 0,
- i,len,j,jlen,opt;
-
- this.resetFormState();
-
- if(typeof formId == 'string'){
- // Determine if the argument is a form id or a form name.
- // Note form name usage is deprecated by supported
- // here for legacy reasons.
- oForm = (document.getElementById(formId) || document.forms[formId]);
- }
- else if(typeof formId == 'object'){
- // Treat argument as an HTML form object.
- oForm = formId;
- }
- else{
- return;
- }
-
- // If the isUpload argument is true, setForm will call createFrame to initialize
- // an iframe as the form target.
- //
- // The argument secureURI is also required by IE in SSL environments
- // where the secureURI string is a fully qualified HTTP path, used to set the source
- // of the iframe, to a stub resource in the same domain.
- if(isUpload){
-
- // Create iframe in preparation for file upload.
- this.createFrame(secureUri?secureUri:null);
-
- // Set form reference and file upload properties to true.
- this._isFormSubmit = true;
- this._isFileUpload = true;
- this._formNode = oForm;
-
- return;
-
- }
-
- // Iterate over the form elements collection to construct the
- // label-value pairs.
- for (i=0,len=oForm.elements.length; i<len; ++i){
- oElement = oForm.elements[i];
- oDisabled = oElement.disabled;
- oName = oElement.name;
-
- // Do not submit fields that are disabled or
- // do not have a name attribute value.
- if(!oDisabled && oName)
- {
- oName = encodeURIComponent(oName)+'=';
- oValue = encodeURIComponent(oElement.value);
-
- switch(oElement.type)
- {
- // Safari, Opera, FF all default opt.value from .text if
- // value attribute not specified in markup
- case 'select-one':
- if (oElement.selectedIndex > -1) {
- opt = oElement.options[oElement.selectedIndex];
- data[item++] = oName + encodeURIComponent(
- (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
- }
- break;
- case 'select-multiple':
- if (oElement.selectedIndex > -1) {
- for(j=oElement.selectedIndex, jlen=oElement.options.length; j<jlen; ++j){
- opt = oElement.options[j];
- if (opt.selected) {
- data[item++] = oName + encodeURIComponent(
- (opt.attributes.value && opt.attributes.value.specified) ? opt.value : opt.text);
- }
- }
- }
- break;
- case 'radio':
- case 'checkbox':
- if(oElement.checked){
- data[item++] = oName + oValue;
- }
- break;
- case 'file':
- // stub case as XMLHttpRequest will only send the file path as a string.
- case undefined:
- // stub case for fieldset element which returns undefined.
- case 'reset':
- // stub case for input type reset button.
- case 'button':
- // stub case for input type button elements.
- break;
- case 'submit':
- if(hasSubmit === false){
- if(this._hasSubmitListener && this._submitElementValue){
- data[item++] = this._submitElementValue;
- }
- hasSubmit = true;
- }
- break;
- default:
- data[item++] = oName + oValue;
- }
- }
- }
-
- this._isFormSubmit = true;
- this._sFormData = data.join('&');
-
-
- this.initHeader('Content-Type', this._default_form_header);
-
- return this._sFormData;
- },
-
- /**
- * @description Resets HTML form properties when an HTML form or HTML form
- * with file upload transaction is sent.
- * @method resetFormState
- * @private
- * @static
- * @return {void}
- */
- resetFormState:function(){
- this._isFormSubmit = false;
- this._isFileUpload = false;
- this._formNode = null;
- this._sFormData = "";
- },
-
- /**
- * @description Creates an iframe to be used for form file uploads. It is remove from the
- * document upon completion of the upload transaction.
- * @method createFrame
- * @private
- * @static
- * @param {string} optional qualified path of iframe resource for SSL in IE.
- * @return {void}
- */
- createFrame:function(secureUri){
-
- // IE does not allow the setting of id and name attributes as object
- // properties via createElement(). A different iframe creation
- // pattern is required for IE.
- var frameId = 'yuiIO' + this._transaction_id;
- var io;
- if(YAHOO.env.ua.ie){
- io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
-
- // IE will throw a security exception in an SSL environment if the
- // iframe source is undefined.
- if(typeof secureUri == 'boolean'){
- io.src = 'javascript:false';
- }
- }
- else{
- io = document.createElement('iframe');
- io.id = frameId;
- io.name = frameId;
- }
-
- io.style.position = 'absolute';
- io.style.top = '-1000px';
- io.style.left = '-1000px';
-
- document.body.appendChild(io);
- },
-
- /**
- * @description Parses the POST data and creates hidden form elements
- * for each key-value, and appends them to the HTML form object.
- * @method appendPostData
- * @private
- * @static
- * @param {string} postData The HTTP POST data
- * @return {array} formElements Collection of hidden fields.
- */
- appendPostData:function(postData)
- {
- var formElements = [],
- postMessage = postData.split('&'),
- i, delimitPos;
- for(i=0; i < postMessage.length; i++){
- delimitPos = postMessage[i].indexOf('=');
- if(delimitPos != -1){
- formElements[i] = document.createElement('input');
- formElements[i].type = 'hidden';
- formElements[i].name = decodeURIComponent(postMessage[i].substring(0,delimitPos));
- formElements[i].value = decodeURIComponent(postMessage[i].substring(delimitPos+1));
- this._formNode.appendChild(formElements[i]);
- }
- }
-
- return formElements;
- },
-
- /**
- * @description Uploads HTML form, inclusive of files/attachments, using the
- * iframe created in createFrame to facilitate the transaction.
- * @method uploadFile
- * @private
- * @static
- * @param {int} id The transaction id.
- * @param {object} callback User-defined callback object.
- * @param {string} uri Fully qualified path of resource.
- * @param {string} postData POST data to be submitted in addition to HTML form.
- * @return {void}
- */
- uploadFile:function(o, callback, uri, postData){
-
- // Each iframe has an id prefix of "yuiIO" followed
- // by the unique transaction id.
- var frameId = 'yuiIO' + o.tId,
- uploadEncoding = 'multipart/form-data',
- io = document.getElementById(frameId),
- oConn = this,
- args = (callback && callback.argument)?callback.argument:null,
- oElements,i,prop,obj;
-
- // Track original HTML form attribute values.
- var rawFormAttributes =
- {
- action:this._formNode.getAttribute('action'),
- method:this._formNode.getAttribute('method'),
- target:this._formNode.getAttribute('target')
- };
-
- // Initialize the HTML form properties in case they are
- // not defined in the HTML form.
- this._formNode.setAttribute('action', uri);
- this._formNode.setAttribute('method', 'POST');
- this._formNode.setAttribute('target', frameId);
-
- if(YAHOO.env.ua.ie){
- // IE does not respect property enctype for HTML forms.
- // Instead it uses the property - "encoding".
- this._formNode.setAttribute('encoding', uploadEncoding);
- }
- else{
- this._formNode.setAttribute('enctype', uploadEncoding);
- }
-
- if(postData){
- oElements = this.appendPostData(postData);
- }
-
- // Start file upload.
- this._formNode.submit();
-
- // Fire global custom event -- startEvent
- this.startEvent.fire(o, args);
-
- if(o.startEvent){
- // Fire transaction custom event -- startEvent
- o.startEvent.fire(o, args);
- }
-
- // Start polling if a callback is present and the timeout
- // property has been defined.
- if(callback && callback.timeout){
- this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
- }
-
- // Remove HTML elements created by appendPostData
- if(oElements && oElements.length > 0){
- for(i=0; i < oElements.length; i++){
- this._formNode.removeChild(oElements[i]);
- }
- }
-
- // Restore HTML form attributes to their original
- // values prior to file upload.
- for(prop in rawFormAttributes){
- if(YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)){
- if(rawFormAttributes[prop]){
- this._formNode.setAttribute(prop, rawFormAttributes[prop]);
- }
- else{
- this._formNode.removeAttribute(prop);
- }
- }
- }
-
- // Reset HTML form state properties.
- this.resetFormState();
-
- // Create the upload callback handler that fires when the iframe
- // receives the load event. Subsequently, the event handler is detached
- // and the iframe removed from the document.
- var uploadCallback = function()
- {
- if(callback && callback.timeout){
- window.clearTimeout(oConn._timeOut[o.tId]);
- delete oConn._timeOut[o.tId];
- }
-
- // Fire global custom event -- completeEvent
- oConn.completeEvent.fire(o, args);
-
- if(o.completeEvent){
- // Fire transaction custom event -- completeEvent
- o.completeEvent.fire(o, args);
- }
-
- obj = {
- tId : o.tId,
- argument : callback.argument
- };
-
- try
- {
- // responseText and responseXML will be populated with the same data from the iframe.
- // Since the HTTP headers cannot be read from the iframe
- obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:io.contentWindow.document.documentElement.textContent;
- obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
- }
- catch(e){}
-
- if(callback && callback.upload){
- if(!callback.scope){
- callback.upload(obj);
- }
- else{
- callback.upload.apply(callback.scope, [obj]);
- }
- }
-
- // Fire global custom event -- uploadEvent
- oConn.uploadEvent.fire(obj);
-
- if(o.uploadEvent){
- // Fire transaction custom event -- uploadEvent
- o.uploadEvent.fire(obj);
- }
-
- YAHOO.util.Event.removeListener(io, "load", uploadCallback);
-
- setTimeout(
- function(){
- document.body.removeChild(io);
- oConn.releaseObject(o);
- }, 100);
- };
-
- // Bind the onload handler to the iframe to detect the file upload response.
- YAHOO.util.Event.addListener(io, "load", uploadCallback);
- },
-
- /**
- * @description Method to terminate a transaction, if it has not reached readyState 4.
- * @method abort
- * @public
- * @static
- * @param {object} o The connection object returned by asyncRequest.
- * @param {object} callback User-defined callback object.
- * @param {string} isTimeout boolean to indicate if abort resulted from a callback timeout.
- * @return {boolean}
- */
- abort:function(o, callback, isTimeout)
- {
- var abortStatus;
- var args = (callback && callback.argument)?callback.argument:null;
-
-
- if(o && o.conn){
- if(this.isCallInProgress(o)){
- // Issue abort request
- o.conn.abort();
-
- window.clearInterval(this._poll[o.tId]);
- delete this._poll[o.tId];
-
- if(isTimeout){
- window.clearTimeout(this._timeOut[o.tId]);
- delete this._timeOut[o.tId];
- }
-
- abortStatus = true;
- }
- }
- else if(o && o.isUpload === true){
- var frameId = 'yuiIO' + o.tId;
- var io = document.getElementById(frameId);
-
- if(io){
- // Remove all listeners on the iframe prior to
- // its destruction.
- YAHOO.util.Event.removeListener(io, "load");
- // Destroy the iframe facilitating the transaction.
- document.body.removeChild(io);
-
- if(isTimeout){
- window.clearTimeout(this._timeOut[o.tId]);
- delete this._timeOut[o.tId];
- }
-
- abortStatus = true;
- }
- }
- else{
- abortStatus = false;
- }
-
- if(abortStatus === true){
- // Fire global custom event -- abortEvent
- this.abortEvent.fire(o, args);
-
- if(o.abortEvent){
- // Fire transaction custom event -- abortEvent
- o.abortEvent.fire(o, args);
- }
-
- this.handleTransactionResponse(o, callback, true);
- }
-
- return abortStatus;
- },
-
- /**
- * @description Determines if the transaction is still being processed.
- * @method isCallInProgress
- * @public
- * @static
- * @param {object} o The connection object returned by asyncRequest
- * @return {boolean}
- */
- isCallInProgress:function(o)
- {
- // if the XHR object assigned to the transaction has not been dereferenced,
- // then check its readyState status. Otherwise, return false.
- if(o && o.conn){
- return o.conn.readyState !== 4 && o.conn.readyState !== 0;
- }
- else if(o && o.isUpload === true){
- var frameId = 'yuiIO' + o.tId;
- return document.getElementById(frameId)?true:false;
- }
- else{
- return false;
- }
- },
-
- /**
- * @description Dereference the XHR instance and the connection object after the transaction is completed.
- * @method releaseObject
- * @private
- * @static
- * @param {object} o The connection object
- * @return {void}
- */
- releaseObject:function(o)
- {
- if(o && o.conn){
- //dereference the XHR instance.
- o.conn = null;
-
-
- //dereference the connection object.
- o = null;
- }
- }
-};
-YAHOO.register("connection", YAHOO.util.Connect, {version: "2.7.0", build: "1799"});
ToastFreeware / philipp / winterrodeln / wradmin.git / blobdiff