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601
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doc
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/*
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Copyright (c) 2007, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 2.4.1
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*/
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/**
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* The Connection Manager provides a simplified interface to the XMLHttpRequest
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* object. It handles cross-browser instantiantion of XMLHttpRequest, negotiates the
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* interactive states and server response, returning the results to a pre-defined
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* callback you create.
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*
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* @namespace YAHOO.util
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* @module connection
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* @requires yahoo
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* @requires event
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*/
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/**
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* The Connection Manager singleton provides methods for creating and managing
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* asynchronous transactions.
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*
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* @class Connect
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*/
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YAHOO.util.Connect =
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{
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/**
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* @description Array of MSFT ActiveX ids for XMLHttpRequest.
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* @property _msxml_progid
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* @private
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* @static
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* @type array
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*/
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_msxml_progid:[
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'Microsoft.XMLHTTP',
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'MSXML2.XMLHTTP.3.0',
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'MSXML2.XMLHTTP'
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],
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/**
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* @description Object literal of HTTP header(s)
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* @property _http_header
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* @private
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* @static
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* @type object
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*/
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_http_headers:{},
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/**
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* @description Determines if HTTP headers are set.
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* @property _has_http_headers
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* @private
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* @static
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* @type boolean
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*/
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_has_http_headers:false,
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/**
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* @description Determines if a default header of
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* Content-Type of 'application/x-www-form-urlencoded'
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* will be added to any client HTTP headers sent for POST
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* transactions.
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* @property _use_default_post_header
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* @private
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* @static
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* @type boolean
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*/
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_use_default_post_header:true,
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/**
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* @description The default header used for POST transactions.
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* @property _default_post_header
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* @private
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* @static
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* @type boolean
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*/
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_default_post_header:'application/x-www-form-urlencoded; charset=UTF-8',
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/**
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* @description The default header used for transactions involving the
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* use of HTML forms.
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* @property _default_form_header
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* @private
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* @static
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* @type boolean
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*/
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_default_form_header:'application/x-www-form-urlencoded',
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/**
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* @description Determines if a default header of
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* 'X-Requested-With: XMLHttpRequest'
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* will be added to each transaction.
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* @property _use_default_xhr_header
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* @private
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* @static
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* @type boolean
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*/
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_use_default_xhr_header:true,
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/**
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* @description The default header value for the label
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* "X-Requested-With". This is sent with each
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* transaction, by default, to identify the
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* request as being made by YUI Connection Manager.
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* @property _default_xhr_header
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* @private
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* @static
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* @type boolean
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*/
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_default_xhr_header:'XMLHttpRequest',
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/**
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* @description Determines if custom, default headers
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* are set for each transaction.
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* @property _has_default_header
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* @private
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* @static
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* @type boolean
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*/
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_has_default_headers:true,
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/**
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* @description Determines if custom, default headers
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* are set for each transaction.
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* @property _has_default_header
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* @private
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* @static
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* @type boolean
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*/
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_default_headers:{},
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/**
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* @description Property modified by setForm() to determine if the data
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* should be submitted as an HTML form.
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* @property _isFormSubmit
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* @private
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* @static
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* @type boolean
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*/
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_isFormSubmit:false,
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/**
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* @description Property modified by setForm() to determine if a file(s)
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* upload is expected.
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* @property _isFileUpload
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* @private
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* @static
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* @type boolean
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*/
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_isFileUpload:false,
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/**
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* @description Property modified by setForm() to set a reference to the HTML
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* form node if the desired action is file upload.
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* @property _formNode
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* @private
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* @static
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* @type object
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*/
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_formNode:null,
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/**
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* @description Property modified by setForm() to set the HTML form data
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* for each transaction.
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* @property _sFormData
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* @private
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* @static
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* @type string
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*/
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_sFormData:null,
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/**
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* @description Collection of polling references to the polling mechanism in handleReadyState.
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* @property _poll
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* @private
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* @static
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* @type object
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*/
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_poll:{},
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/**
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* @description Queue of timeout values for each transaction callback with a defined timeout value.
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* @property _timeOut
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* @private
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* @static
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* @type object
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*/
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_timeOut:{},
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/**
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* @description The polling frequency, in milliseconds, for HandleReadyState.
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* when attempting to determine a transaction's XHR readyState.
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* The default is 50 milliseconds.
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* @property _polling_interval
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* @private
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* @static
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* @type int
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*/
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_polling_interval:50,
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/**
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* @description A transaction counter that increments the transaction id for each transaction.
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* @property _transaction_id
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* @private
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* @static
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* @type int
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*/
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_transaction_id:0,
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/**
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* @description Tracks the name-value pair of the "clicked" submit button if multiple submit
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* buttons are present in an HTML form; and, if YAHOO.util.Event is available.
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* @property _submitElementValue
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* @private
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* @static
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* @type string
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*/
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_submitElementValue:null,
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/**
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* @description Determines whether YAHOO.util.Event is available and returns true or false.
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* If true, an event listener is bound at the document level to trap click events that
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* resolve to a target type of "Submit". This listener will enable setForm() to determine
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* the clicked "Submit" value in a multi-Submit button, HTML form.
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* @property _hasSubmitListener
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* @private
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* @static
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*/
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_hasSubmitListener:(function()
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{
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if(YAHOO.util.Event){
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YAHOO.util.Event.addListener(
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document,
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'click',
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function(e){
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var obj = YAHOO.util.Event.getTarget(e);
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if(obj.type && obj.type.toLowerCase() == 'submit'){
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YAHOO.util.Connect._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
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}
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});
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return true;
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}
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return false;
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})(),
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/**
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* @description Custom event that fires at the start of a transaction
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* @property startEvent
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* @private
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* @static
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* @type CustomEvent
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*/
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startEvent: new YAHOO.util.CustomEvent('start'),
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/**
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* @description Custom event that fires when a transaction response has completed.
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* @property completeEvent
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* @private
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* @static
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* @type CustomEvent
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*/
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completeEvent: new YAHOO.util.CustomEvent('complete'),
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/**
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* @description Custom event that fires when handleTransactionResponse() determines a
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* response in the HTTP 2xx range.
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* @property successEvent
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* @private
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* @static
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* @type CustomEvent
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*/
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successEvent: new YAHOO.util.CustomEvent('success'),
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/**
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* @description Custom event that fires when handleTransactionResponse() determines a
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* response in the HTTP 4xx/5xx range.
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* @property failureEvent
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* @private
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* @static
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* @type CustomEvent
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*/
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failureEvent: new YAHOO.util.CustomEvent('failure'),
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/**
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* @description Custom event that fires when handleTransactionResponse() determines a
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* response in the HTTP 4xx/5xx range.
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* @property failureEvent
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* @private
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* @static
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* @type CustomEvent
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*/
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uploadEvent: new YAHOO.util.CustomEvent('upload'),
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/**
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* @description Custom event that fires when a transaction is successfully aborted.
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* @property abortEvent
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* @private
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* @static
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* @type CustomEvent
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*/
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abortEvent: new YAHOO.util.CustomEvent('abort'),
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/**
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* @description A reference table that maps callback custom events members to its specific
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* event name.
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* @property _customEvents
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* @private
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* @static
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* @type object
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*/
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_customEvents:
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{
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onStart:['startEvent', 'start'],
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onComplete:['completeEvent', 'complete'],
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onSuccess:['successEvent', 'success'],
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onFailure:['failureEvent', 'failure'],
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onUpload:['uploadEvent', 'upload'],
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onAbort:['abortEvent', 'abort']
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},
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/**
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* @description Member to add an ActiveX id to the existing xml_progid array.
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* In the event(unlikely) a new ActiveX id is introduced, it can be added
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* without internal code modifications.
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* @method setProgId
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| 327 |
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* @public
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| 328 |
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* @static
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| 329 |
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* @param {string} id The ActiveX id to be added to initialize the XHR object.
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| 330 |
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* @return void
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*/
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setProgId:function(id)
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{
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this._msxml_progid.unshift(id);
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YAHOO.log('ActiveX Program Id ' + id + ' added to _msxml_progid.', 'info', 'Connection');
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},
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| 338 |
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/**
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| 339 |
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* @description Member to override the default POST header.
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| 340 |
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* @method setDefaultPostHeader
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| 341 |
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* @public
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| 342 |
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* @static
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| 343 |
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* @param {boolean} b Set and use default header - true or false .
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| 344 |
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* @return void
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*/
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setDefaultPostHeader:function(b)
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{
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if(typeof b == 'string'){
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this._default_post_header = b;
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YAHOO.log('Default POST header set to ' + b, 'info', 'Connection');
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}
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else if(typeof b == 'boolean'){
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this._use_default_post_header = b;
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}
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},
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| 356 |
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| 357 |
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/**
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| 358 |
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* @description Member to override the default transaction header..
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| 359 |
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* @method setDefaultXhrHeader
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| 360 |
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* @public
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| 361 |
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* @static
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| 362 |
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* @param {boolean} b Set and use default header - true or false .
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| 363 |
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* @return void
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| 364 |
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*/
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| 365 |
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setDefaultXhrHeader:function(b)
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| 366 |
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{
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if(typeof b == 'string'){
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this._default_xhr_header = b;
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YAHOO.log('Default XHR header set to ' + b, 'info', 'Connection');
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}
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else{
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this._use_default_xhr_header = b;
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}
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| 374 |
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},
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| 375 |
|
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| 376 |
|
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/**
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| 377 |
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* @description Member to modify the default polling interval.
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| 378 |
|
|
* @method setPollingInterval
|
| 379 |
|
|
* @public
|
| 380 |
|
|
* @static
|
| 381 |
|
|
* @param {int} i The polling interval in milliseconds.
|
| 382 |
|
|
* @return void
|
| 383 |
|
|
*/
|
| 384 |
|
|
setPollingInterval:function(i)
|
| 385 |
|
|
{
|
| 386 |
|
|
if(typeof i == 'number' && isFinite(i)){
|
| 387 |
|
|
this._polling_interval = i;
|
| 388 |
|
|
YAHOO.log('Default polling interval set to ' + i +'ms', 'info', 'Connection');
|
| 389 |
|
|
}
|
| 390 |
|
|
},
|
| 391 |
|
|
|
| 392 |
|
|
/**
|
| 393 |
|
|
* @description Instantiates a XMLHttpRequest object and returns an object with two properties:
|
| 394 |
|
|
* the XMLHttpRequest instance and the transaction id.
|
| 395 |
|
|
* @method createXhrObject
|
| 396 |
|
|
* @private
|
| 397 |
|
|
* @static
|
| 398 |
|
|
* @param {int} transactionId Property containing the transaction id for this transaction.
|
| 399 |
|
|
* @return object
|
| 400 |
|
|
*/
|
| 401 |
|
|
createXhrObject:function(transactionId)
|
| 402 |
|
|
{
|
| 403 |
|
|
var obj,http;
|
| 404 |
|
|
try
|
| 405 |
|
|
{
|
| 406 |
|
|
// Instantiates XMLHttpRequest in non-IE browsers and assigns to http.
|
| 407 |
|
|
http = new XMLHttpRequest();
|
| 408 |
|
|
// Object literal with http and tId properties
|
| 409 |
|
|
obj = { conn:http, tId:transactionId };
|
| 410 |
|
|
YAHOO.log('XHR object created for transaction ' + transactionId, 'info', 'Connection');
|
| 411 |
|
|
}
|
| 412 |
|
|
catch(e)
|
| 413 |
|
|
{
|
| 414 |
|
|
for(var i=0; i<this._msxml_progid.length; ++i){
|
| 415 |
|
|
try
|
| 416 |
|
|
{
|
| 417 |
|
|
// Instantiates XMLHttpRequest for IE and assign to http
|
| 418 |
|
|
http = new ActiveXObject(this._msxml_progid[i]);
|
| 419 |
|
|
// Object literal with conn and tId properties
|
| 420 |
|
|
obj = { conn:http, tId:transactionId };
|
| 421 |
|
|
YAHOO.log('ActiveX XHR object created for transaction ' + transactionId, 'info', 'Connection');
|
| 422 |
|
|
break;
|
| 423 |
|
|
}
|
| 424 |
|
|
catch(e){}
|
| 425 |
|
|
}
|
| 426 |
|
|
}
|
| 427 |
|
|
finally
|
| 428 |
|
|
{
|
| 429 |
|
|
return obj;
|
| 430 |
|
|
}
|
| 431 |
|
|
},
|
| 432 |
|
|
|
| 433 |
|
|
/**
|
| 434 |
|
|
* @description This method is called by asyncRequest to create a
|
| 435 |
|
|
* valid connection object for the transaction. It also passes a
|
| 436 |
|
|
* transaction id and increments the transaction id counter.
|
| 437 |
|
|
* @method getConnectionObject
|
| 438 |
|
|
* @private
|
| 439 |
|
|
* @static
|
| 440 |
|
|
* @return {object}
|
| 441 |
|
|
*/
|
| 442 |
|
|
getConnectionObject:function(isFileUpload)
|
| 443 |
|
|
{
|
| 444 |
|
|
var o;
|
| 445 |
|
|
var tId = this._transaction_id;
|
| 446 |
|
|
|
| 447 |
|
|
try
|
| 448 |
|
|
{
|
| 449 |
|
|
if(!isFileUpload){
|
| 450 |
|
|
o = this.createXhrObject(tId);
|
| 451 |
|
|
}
|
| 452 |
|
|
else{
|
| 453 |
|
|
o = {};
|
| 454 |
|
|
o.tId = tId;
|
| 455 |
|
|
o.isUpload = true;
|
| 456 |
|
|
}
|
| 457 |
|
|
|
| 458 |
|
|
if(o){
|
| 459 |
|
|
this._transaction_id++;
|
| 460 |
|
|
}
|
| 461 |
|
|
}
|
| 462 |
|
|
catch(e){}
|
| 463 |
|
|
finally
|
| 464 |
|
|
{
|
| 465 |
|
|
return o;
|
| 466 |
|
|
}
|
| 467 |
|
|
},
|
| 468 |
|
|
|
| 469 |
|
|
/**
|
| 470 |
|
|
* @description Method for initiating an asynchronous request via the XHR object.
|
| 471 |
|
|
* @method asyncRequest
|
| 472 |
|
|
* @public
|
| 473 |
|
|
* @static
|
| 474 |
|
|
* @param {string} method HTTP transaction method
|
| 475 |
|
|
* @param {string} uri Fully qualified path of resource
|
| 476 |
|
|
* @param {callback} callback User-defined callback function or object
|
| 477 |
|
|
* @param {string} postData POST body
|
| 478 |
|
|
* @return {object} Returns the connection object
|
| 479 |
|
|
*/
|
| 480 |
|
|
asyncRequest:function(method, uri, callback, postData)
|
| 481 |
|
|
{
|
| 482 |
|
|
var o = (this._isFileUpload)?this.getConnectionObject(true):this.getConnectionObject();
|
| 483 |
|
|
var args = (callback && callback.argument)?callback.argument:null;
|
| 484 |
|
|
|
| 485 |
|
|
if(!o){
|
| 486 |
|
|
YAHOO.log('Unable to create connection object.', 'error', 'Connection');
|
| 487 |
|
|
return null;
|
| 488 |
|
|
}
|
| 489 |
|
|
else{
|
| 490 |
|
|
|
| 491 |
|
|
// Intialize any transaction-specific custom events, if provided.
|
| 492 |
|
|
if(callback && callback.customevents){
|
| 493 |
|
|
this.initCustomEvents(o, callback);
|
| 494 |
|
|
}
|
| 495 |
|
|
|
| 496 |
|
|
if(this._isFormSubmit){
|
| 497 |
|
|
if(this._isFileUpload){
|
| 498 |
|
|
this.uploadFile(o, callback, uri, postData);
|
| 499 |
|
|
return o;
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
// If the specified HTTP method is GET, setForm() will return an
|
| 503 |
|
|
// encoded string that is concatenated to the uri to
|
| 504 |
|
|
// create a querystring.
|
| 505 |
|
|
if(method.toUpperCase() == 'GET'){
|
| 506 |
|
|
if(this._sFormData.length !== 0){
|
| 507 |
|
|
// If the URI already contains a querystring, append an ampersand
|
| 508 |
|
|
// and then concatenate _sFormData to the URI.
|
| 509 |
|
|
uri += ((uri.indexOf('?') == -1)?'?':'&') + this._sFormData;
|
| 510 |
|
|
}
|
| 511 |
|
|
}
|
| 512 |
|
|
else if(method.toUpperCase() == 'POST'){
|
| 513 |
|
|
// If POST data exist in addition to the HTML form data,
|
| 514 |
|
|
// it will be concatenated to the form data.
|
| 515 |
|
|
postData = postData?this._sFormData + "&" + postData:this._sFormData;
|
| 516 |
|
|
}
|
| 517 |
|
|
}
|
| 518 |
|
|
|
| 519 |
|
|
if(method.toUpperCase() == 'GET' && (callback && callback.cache === false)){
|
| 520 |
|
|
// If callback.cache is defined and set to false, a
|
| 521 |
|
|
// timestamp value will be added to the querystring.
|
| 522 |
|
|
uri += ((uri.indexOf('?') == -1)?'?':'&') + "rnd=" + new Date().valueOf().toString();
|
| 523 |
|
|
}
|
| 524 |
|
|
|
| 525 |
|
|
o.conn.open(method, uri, true);
|
| 526 |
|
|
|
| 527 |
|
|
// Each transaction will automatically include a custom header of
|
| 528 |
|
|
// "X-Requested-With: XMLHttpRequest" to identify the request as
|
| 529 |
|
|
// having originated from Connection Manager.
|
| 530 |
|
|
if(this._use_default_xhr_header){
|
| 531 |
|
|
if(!this._default_headers['X-Requested-With']){
|
| 532 |
|
|
this.initHeader('X-Requested-With', this._default_xhr_header, true);
|
| 533 |
|
|
YAHOO.log('Initialize transaction header X-Request-Header to XMLHttpRequest.', 'info', 'Connection');
|
| 534 |
|
|
}
|
| 535 |
|
|
}
|
| 536 |
|
|
|
| 537 |
|
|
//If the transaction method is POST and the POST header value is set to true
|
| 538 |
|
|
//or a custom value, initalize the Content-Type header to this value.
|
| 539 |
|
|
if((method.toUpperCase() == 'POST' && this._use_default_post_header) && this._isFormSubmit === false){
|
| 540 |
|
|
this.initHeader('Content-Type', this._default_post_header);
|
| 541 |
|
|
YAHOO.log('Initialize header Content-Type to application/x-www-form-urlencoded; UTF-8 for POST transaction.', 'info', 'Connection');
|
| 542 |
|
|
}
|
| 543 |
|
|
|
| 544 |
|
|
//Initialize all default and custom HTTP headers,
|
| 545 |
|
|
if(this._has_default_headers || this._has_http_headers){
|
| 546 |
|
|
this.setHeader(o);
|
| 547 |
|
|
}
|
| 548 |
|
|
|
| 549 |
|
|
this.handleReadyState(o, callback);
|
| 550 |
|
|
o.conn.send(postData || null);
|
| 551 |
|
|
YAHOO.log('Transaction ' + o.tId + ' sent.', 'info', 'Connection');
|
| 552 |
|
|
|
| 553 |
|
|
|
| 554 |
|
|
// Reset the HTML form data and state properties as
|
| 555 |
|
|
// soon as the data are submitted.
|
| 556 |
|
|
if(this._isFormSubmit === true){
|
| 557 |
|
|
this.resetFormState();
|
| 558 |
|
|
}
|
| 559 |
|
|
|
| 560 |
|
|
// Fire global custom event -- startEvent
|
| 561 |
|
|
this.startEvent.fire(o, args);
|
| 562 |
|
|
|
| 563 |
|
|
if(o.startEvent){
|
| 564 |
|
|
// Fire transaction custom event -- startEvent
|
| 565 |
|
|
o.startEvent.fire(o, args);
|
| 566 |
|
|
}
|
| 567 |
|
|
|
| 568 |
|
|
return o;
|
| 569 |
|
|
}
|
| 570 |
|
|
},
|
| 571 |
|
|
|
| 572 |
|
|
/**
|
| 573 |
|
|
* @description This method creates and subscribes custom events,
|
| 574 |
|
|
* specific to each transaction
|
| 575 |
|
|
* @method initCustomEvents
|
| 576 |
|
|
* @private
|
| 577 |
|
|
* @static
|
| 578 |
|
|
* @param {object} o The connection object
|
| 579 |
|
|
* @param {callback} callback The user-defined callback object
|
| 580 |
|
|
* @return {void}
|
| 581 |
|
|
*/
|
| 582 |
|
|
initCustomEvents:function(o, callback)
|
| 583 |
|
|
{
|
| 584 |
|
|
// Enumerate through callback.customevents members and bind/subscribe
|
| 585 |
|
|
// events that match in the _customEvents table.
|
| 586 |
|
|
for(var prop in callback.customevents){
|
| 587 |
|
|
if(this._customEvents[prop][0]){
|
| 588 |
|
|
// Create the custom event
|
| 589 |
|
|
o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope)?callback.scope:null);
|
| 590 |
|
|
YAHOO.log('Transaction-specific Custom Event ' + o[this._customEvents[prop][1]] + ' created.', 'info', 'Connection');
|
| 591 |
|
|
|
| 592 |
|
|
// Subscribe the custom event
|
| 593 |
|
|
o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
|
| 594 |
|
|
YAHOO.log('Transaction-specific Custom Event ' + o[this._customEvents[prop][1]] + ' subscribed.', 'info', 'Connection');
|
| 595 |
|
|
}
|
| 596 |
|
|
}
|
| 597 |
|
|
},
|
| 598 |
|
|
|
| 599 |
|
|
/**
|
| 600 |
|
|
* @description This method serves as a timer that polls the XHR object's readyState
|
| 601 |
|
|
* property during a transaction, instead of binding a callback to the
|
| 602 |
|
|
* onreadystatechange event. Upon readyState 4, handleTransactionResponse
|
| 603 |
|
|
* will process the response, and the timer will be cleared.
|
| 604 |
|
|
* @method handleReadyState
|
| 605 |
|
|
* @private
|
| 606 |
|
|
* @static
|
| 607 |
|
|
* @param {object} o The connection object
|
| 608 |
|
|
* @param {callback} callback The user-defined callback object
|
| 609 |
|
|
* @return {void}
|
| 610 |
|
|
*/
|
| 611 |
|
|
|
| 612 |
|
|
handleReadyState:function(o, callback)
|
| 613 |
|
|
|
| 614 |
|
|
{
|
| 615 |
|
|
var oConn = this;
|
| 616 |
|
|
var args = (callback && callback.argument)?callback.argument:null;
|
| 617 |
|
|
|
| 618 |
|
|
if(callback && callback.timeout){
|
| 619 |
|
|
this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
|
| 620 |
|
|
}
|
| 621 |
|
|
|
| 622 |
|
|
this._poll[o.tId] = window.setInterval(
|
| 623 |
|
|
function(){
|
| 624 |
|
|
if(o.conn && o.conn.readyState === 4){
|
| 625 |
|
|
|
| 626 |
|
|
// Clear the polling interval for the transaction
|
| 627 |
|
|
// and remove the reference from _poll.
|
| 628 |
|
|
window.clearInterval(oConn._poll[o.tId]);
|
| 629 |
|
|
delete oConn._poll[o.tId];
|
| 630 |
|
|
|
| 631 |
|
|
if(callback && callback.timeout){
|
| 632 |
|
|
window.clearTimeout(oConn._timeOut[o.tId]);
|
| 633 |
|
|
delete oConn._timeOut[o.tId];
|
| 634 |
|
|
}
|
| 635 |
|
|
|
| 636 |
|
|
// Fire global custom event -- completeEvent
|
| 637 |
|
|
oConn.completeEvent.fire(o, args);
|
| 638 |
|
|
|
| 639 |
|
|
if(o.completeEvent){
|
| 640 |
|
|
// Fire transaction custom event -- completeEvent
|
| 641 |
|
|
o.completeEvent.fire(o, args);
|
| 642 |
|
|
}
|
| 643 |
|
|
|
| 644 |
|
|
oConn.handleTransactionResponse(o, callback);
|
| 645 |
|
|
}
|
| 646 |
|
|
}
|
| 647 |
|
|
,this._polling_interval);
|
| 648 |
|
|
},
|
| 649 |
|
|
|
| 650 |
|
|
/**
|
| 651 |
|
|
* @description This method attempts to interpret the server response and
|
| 652 |
|
|
* determine whether the transaction was successful, or if an error or
|
| 653 |
|
|
* exception was encountered.
|
| 654 |
|
|
* @method handleTransactionResponse
|
| 655 |
|
|
* @private
|
| 656 |
|
|
* @static
|
| 657 |
|
|
* @param {object} o The connection object
|
| 658 |
|
|
* @param {object} callback The user-defined callback object
|
| 659 |
|
|
* @param {boolean} isAbort Determines if the transaction was terminated via abort().
|
| 660 |
|
|
* @return {void}
|
| 661 |
|
|
*/
|
| 662 |
|
|
handleTransactionResponse:function(o, callback, isAbort)
|
| 663 |
|
|
{
|
| 664 |
|
|
var httpStatus, responseObject;
|
| 665 |
|
|
var args = (callback && callback.argument)?callback.argument:null;
|
| 666 |
|
|
|
| 667 |
|
|
try
|
| 668 |
|
|
{
|
| 669 |
|
|
if(o.conn.status !== undefined && o.conn.status !== 0){
|
| 670 |
|
|
httpStatus = o.conn.status;
|
| 671 |
|
|
}
|
| 672 |
|
|
else{
|
| 673 |
|
|
httpStatus = 13030;
|
| 674 |
|
|
}
|
| 675 |
|
|
}
|
| 676 |
|
|
catch(e){
|
| 677 |
|
|
|
| 678 |
|
|
// 13030 is a custom code to indicate the condition -- in Mozilla/FF --
|
| 679 |
|
|
// when the XHR object's status and statusText properties are
|
| 680 |
|
|
// unavailable, and a query attempt throws an exception.
|
| 681 |
|
|
httpStatus = 13030;
|
| 682 |
|
|
}
|
| 683 |
|
|
|
| 684 |
|
|
if(httpStatus >= 200 && httpStatus < 300 || httpStatus === 1223){
|
| 685 |
|
|
responseObject = this.createResponseObject(o, args);
|
| 686 |
|
|
if(callback && callback.success){
|
| 687 |
|
|
if(!callback.scope){
|
| 688 |
|
|
callback.success(responseObject);
|
| 689 |
|
|
YAHOO.log('Success callback. HTTP code is ' + httpStatus, 'info', 'Connection');
|
| 690 |
|
|
}
|
| 691 |
|
|
else{
|
| 692 |
|
|
// If a scope property is defined, the callback will be fired from
|
| 693 |
|
|
// the context of the object.
|
| 694 |
|
|
callback.success.apply(callback.scope, [responseObject]);
|
| 695 |
|
|
YAHOO.log('Success callback with scope. HTTP code is ' + httpStatus, 'info', 'Connection');
|
| 696 |
|
|
}
|
| 697 |
|
|
}
|
| 698 |
|
|
|
| 699 |
|
|
// Fire global custom event -- successEvent
|
| 700 |
|
|
this.successEvent.fire(responseObject);
|
| 701 |
|
|
|
| 702 |
|
|
if(o.successEvent){
|
| 703 |
|
|
// Fire transaction custom event -- successEvent
|
| 704 |
|
|
o.successEvent.fire(responseObject);
|
| 705 |
|
|
}
|
| 706 |
|
|
}
|
| 707 |
|
|
else{
|
| 708 |
|
|
switch(httpStatus){
|
| 709 |
|
|
// The following cases are wininet.dll error codes that may be encountered.
|
| 710 |
|
|
case 12002: // Server timeout
|
| 711 |
|
|
case 12029: // 12029 to 12031 correspond to dropped connections.
|
| 712 |
|
|
case 12030:
|
| 713 |
|
|
case 12031:
|
| 714 |
|
|
case 12152: // Connection closed by server.
|
| 715 |
|
|
case 13030: // See above comments for variable status.
|
| 716 |
|
|
responseObject = this.createExceptionObject(o.tId, args, (isAbort?isAbort:false));
|
| 717 |
|
|
if(callback && callback.failure){
|
| 718 |
|
|
if(!callback.scope){
|
| 719 |
|
|
callback.failure(responseObject);
|
| 720 |
|
|
YAHOO.log('Failure callback. Exception detected. Status code is ' + httpStatus, 'warn', 'Connection');
|
| 721 |
|
|
}
|
| 722 |
|
|
else{
|
| 723 |
|
|
callback.failure.apply(callback.scope, [responseObject]);
|
| 724 |
|
|
YAHOO.log('Failure callback with scope. Exception detected. Status code is ' + httpStatus, 'warn', 'Connection');
|
| 725 |
|
|
}
|
| 726 |
|
|
}
|
| 727 |
|
|
|
| 728 |
|
|
break;
|
| 729 |
|
|
default:
|
| 730 |
|
|
responseObject = this.createResponseObject(o, args);
|
| 731 |
|
|
if(callback && callback.failure){
|
| 732 |
|
|
if(!callback.scope){
|
| 733 |
|
|
callback.failure(responseObject);
|
| 734 |
|
|
YAHOO.log('Failure callback. HTTP status code is ' + httpStatus, 'warn', 'Connection');
|
| 735 |
|
|
}
|
| 736 |
|
|
else{
|
| 737 |
|
|
callback.failure.apply(callback.scope, [responseObject]);
|
| 738 |
|
|
YAHOO.log('Failure callback with scope. HTTP status code is ' + httpStatus, 'warn', 'Connection');
|
| 739 |
|
|
}
|
| 740 |
|
|
}
|
| 741 |
|
|
}
|
| 742 |
|
|
|
| 743 |
|
|
// Fire global custom event -- failureEvent
|
| 744 |
|
|
this.failureEvent.fire(responseObject);
|
| 745 |
|
|
|
| 746 |
|
|
if(o.failureEvent){
|
| 747 |
|
|
// Fire transaction custom event -- failureEvent
|
| 748 |
|
|
o.failureEvent.fire(responseObject);
|
| 749 |
|
|
}
|
| 750 |
|
|
|
| 751 |
|
|
}
|
| 752 |
|
|
|
| 753 |
|
|
this.releaseObject(o);
|
| 754 |
|
|
responseObject = null;
|
| 755 |
|
|
},
|
| 756 |
|
|
|
| 757 |
|
|
/**
|
| 758 |
|
|
* @description This method evaluates the server response, creates and returns the results via
|
| 759 |
|
|
* its properties. Success and failure cases will differ in the response
|
| 760 |
|
|
* object's property values.
|
| 761 |
|
|
* @method createResponseObject
|
| 762 |
|
|
* @private
|
| 763 |
|
|
* @static
|
| 764 |
|
|
* @param {object} o The connection object
|
| 765 |
|
|
* @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
|
| 766 |
|
|
* @return {object}
|
| 767 |
|
|
*/
|
| 768 |
|
|
createResponseObject:function(o, callbackArg)
|
| 769 |
|
|
{
|
| 770 |
|
|
var obj = {};
|
| 771 |
|
|
var headerObj = {};
|
| 772 |
|
|
|
| 773 |
|
|
try
|
| 774 |
|
|
{
|
| 775 |
|
|
var headerStr = o.conn.getAllResponseHeaders();
|
| 776 |
|
|
var header = headerStr.split('\n');
|
| 777 |
|
|
for(var i=0; i<header.length; i++){
|
| 778 |
|
|
var delimitPos = header[i].indexOf(':');
|
| 779 |
|
|
if(delimitPos != -1){
|
| 780 |
|
|
headerObj[header[i].substring(0,delimitPos)] = header[i].substring(delimitPos+2);
|
| 781 |
|
|
}
|
| 782 |
|
|
}
|
| 783 |
|
|
}
|
| 784 |
|
|
catch(e){}
|
| 785 |
|
|
|
| 786 |
|
|
obj.tId = o.tId;
|
| 787 |
|
|
// Normalize IE's response to HTTP 204 when Win error 1223.
|
| 788 |
|
|
obj.status = (o.conn.status == 1223)?204:o.conn.status;
|
| 789 |
|
|
// Normalize IE's statusText to "No Content" instead of "Unknown".
|
| 790 |
|
|
obj.statusText = (o.conn.status == 1223)?"No Content":o.conn.statusText;
|
| 791 |
|
|
obj.getResponseHeader = headerObj;
|
| 792 |
|
|
obj.getAllResponseHeaders = headerStr;
|
| 793 |
|
|
obj.responseText = o.conn.responseText;
|
| 794 |
|
|
obj.responseXML = o.conn.responseXML;
|
| 795 |
|
|
|
| 796 |
|
|
if(callbackArg){
|
| 797 |
|
|
obj.argument = callbackArg;
|
| 798 |
|
|
}
|
| 799 |
|
|
|
| 800 |
|
|
return obj;
|
| 801 |
|
|
},
|
| 802 |
|
|
|
| 803 |
|
|
/**
|
| 804 |
|
|
* @description If a transaction cannot be completed due to dropped or closed connections,
|
| 805 |
|
|
* there may be not be enough information to build a full response object.
|
| 806 |
|
|
* The failure callback will be fired and this specific condition can be identified
|
| 807 |
|
|
* by a status property value of 0.
|
| 808 |
|
|
*
|
| 809 |
|
|
* If an abort was successful, the status property will report a value of -1.
|
| 810 |
|
|
*
|
| 811 |
|
|
* @method createExceptionObject
|
| 812 |
|
|
* @private
|
| 813 |
|
|
* @static
|
| 814 |
|
|
* @param {int} tId The Transaction Id
|
| 815 |
|
|
* @param {callbackArg} callbackArg The user-defined argument or arguments to be passed to the callback
|
| 816 |
|
|
* @param {boolean} isAbort Determines if the exception case is caused by a transaction abort
|
| 817 |
|
|
* @return {object}
|
| 818 |
|
|
*/
|
| 819 |
|
|
createExceptionObject:function(tId, callbackArg, isAbort)
|
| 820 |
|
|
{
|
| 821 |
|
|
var COMM_CODE = 0;
|
| 822 |
|
|
var COMM_ERROR = 'communication failure';
|
| 823 |
|
|
var ABORT_CODE = -1;
|
| 824 |
|
|
var ABORT_ERROR = 'transaction aborted';
|
| 825 |
|
|
|
| 826 |
|
|
var obj = {};
|
| 827 |
|
|
|
| 828 |
|
|
obj.tId = tId;
|
| 829 |
|
|
if(isAbort){
|
| 830 |
|
|
obj.status = ABORT_CODE;
|
| 831 |
|
|
obj.statusText = ABORT_ERROR;
|
| 832 |
|
|
}
|
| 833 |
|
|
else{
|
| 834 |
|
|
obj.status = COMM_CODE;
|
| 835 |
|
|
obj.statusText = COMM_ERROR;
|
| 836 |
|
|
}
|
| 837 |
|
|
|
| 838 |
|
|
if(callbackArg){
|
| 839 |
|
|
obj.argument = callbackArg;
|
| 840 |
|
|
}
|
| 841 |
|
|
|
| 842 |
|
|
return obj;
|
| 843 |
|
|
},
|
| 844 |
|
|
|
| 845 |
|
|
/**
|
| 846 |
|
|
* @description Method that initializes the custom HTTP headers for the each transaction.
|
| 847 |
|
|
* @method initHeader
|
| 848 |
|
|
* @public
|
| 849 |
|
|
* @static
|
| 850 |
|
|
* @param {string} label The HTTP header label
|
| 851 |
|
|
* @param {string} value The HTTP header value
|
| 852 |
|
|
* @param {string} isDefault Determines if the specific header is a default header
|
| 853 |
|
|
* automatically sent with each transaction.
|
| 854 |
|
|
* @return {void}
|
| 855 |
|
|
*/
|
| 856 |
|
|
initHeader:function(label, value, isDefault)
|
| 857 |
|
|
{
|
| 858 |
|
|
var headerObj = (isDefault)?this._default_headers:this._http_headers;
|
| 859 |
|
|
headerObj[label] = value;
|
| 860 |
|
|
|
| 861 |
|
|
if(isDefault){
|
| 862 |
|
|
this._has_default_headers = true;
|
| 863 |
|
|
}
|
| 864 |
|
|
else{
|
| 865 |
|
|
this._has_http_headers = true;
|
| 866 |
|
|
}
|
| 867 |
|
|
},
|
| 868 |
|
|
|
| 869 |
|
|
|
| 870 |
|
|
/**
|
| 871 |
|
|
* @description Accessor that sets the HTTP headers for each transaction.
|
| 872 |
|
|
* @method setHeader
|
| 873 |
|
|
* @private
|
| 874 |
|
|
* @static
|
| 875 |
|
|
* @param {object} o The connection object for the transaction.
|
| 876 |
|
|
* @return {void}
|
| 877 |
|
|
*/
|
| 878 |
|
|
setHeader:function(o)
|
| 879 |
|
|
{
|
| 880 |
|
|
if(this._has_default_headers){
|
| 881 |
|
|
for(var prop in this._default_headers){
|
| 882 |
|
|
if(YAHOO.lang.hasOwnProperty(this._default_headers, prop)){
|
| 883 |
|
|
o.conn.setRequestHeader(prop, this._default_headers[prop]);
|
| 884 |
|
|
YAHOO.log('Default HTTP header ' + prop + ' set with value of ' + this._default_headers[prop], 'info', 'Connection');
|
| 885 |
|
|
}
|
| 886 |
|
|
}
|
| 887 |
|
|
}
|
| 888 |
|
|
|
| 889 |
|
|
if(this._has_http_headers){
|
| 890 |
|
|
for(var prop in this._http_headers){
|
| 891 |
|
|
if(YAHOO.lang.hasOwnProperty(this._http_headers, prop)){
|
| 892 |
|
|
o.conn.setRequestHeader(prop, this._http_headers[prop]);
|
| 893 |
|
|
YAHOO.log('HTTP header ' + prop + ' set with value of ' + this._http_headers[prop], 'info', 'Connection');
|
| 894 |
|
|
}
|
| 895 |
|
|
}
|
| 896 |
|
|
delete this._http_headers;
|
| 897 |
|
|
|
| 898 |
|
|
this._http_headers = {};
|
| 899 |
|
|
this._has_http_headers = false;
|
| 900 |
|
|
}
|
| 901 |
|
|
},
|
| 902 |
|
|
|
| 903 |
|
|
/**
|
| 904 |
|
|
* @description Resets the default HTTP headers object
|
| 905 |
|
|
* @method resetDefaultHeaders
|
| 906 |
|
|
* @public
|
| 907 |
|
|
* @static
|
| 908 |
|
|
* @return {void}
|
| 909 |
|
|
*/
|
| 910 |
|
|
resetDefaultHeaders:function(){
|
| 911 |
|
|
delete this._default_headers;
|
| 912 |
|
|
this._default_headers = {};
|
| 913 |
|
|
this._has_default_headers = false;
|
| 914 |
|
|
},
|
| 915 |
|
|
|
| 916 |
|
|
/**
|
| 917 |
|
|
* @description This method assembles the form label and value pairs and
|
| 918 |
|
|
* constructs an encoded string.
|
| 919 |
|
|
* asyncRequest() will automatically initialize the transaction with a
|
| 920 |
|
|
* a HTTP header Content-Type of application/x-www-form-urlencoded.
|
| 921 |
|
|
* @method setForm
|
| 922 |
|
|
* @public
|
| 923 |
|
|
* @static
|
| 924 |
|
|
* @param {string || object} form id or name attribute, or form object.
|
| 925 |
|
|
* @param {boolean} optional enable file upload.
|
| 926 |
|
|
* @param {boolean} optional enable file upload over SSL in IE only.
|
| 927 |
|
|
* @return {string} string of the HTML form field name and value pairs..
|
| 928 |
|
|
*/
|
| 929 |
|
|
setForm:function(formId, isUpload, secureUri)
|
| 930 |
|
|
{
|
| 931 |
|
|
// reset the HTML form data and state properties
|
| 932 |
|
|
this.resetFormState();
|
| 933 |
|
|
|
| 934 |
|
|
var oForm;
|
| 935 |
|
|
if(typeof formId == 'string'){
|
| 936 |
|
|
// Determine if the argument is a form id or a form name.
|
| 937 |
|
|
// Note form name usage is deprecated, but supported
|
| 938 |
|
|
// here for backward compatibility.
|
| 939 |
|
|
oForm = (document.getElementById(formId) || document.forms[formId]);
|
| 940 |
|
|
}
|
| 941 |
|
|
else if(typeof formId == 'object'){
|
| 942 |
|
|
// Treat argument as an HTML form object.
|
| 943 |
|
|
oForm = formId;
|
| 944 |
|
|
}
|
| 945 |
|
|
else{
|
| 946 |
|
|
YAHOO.log('Unable to create form object ' + formId, 'warn', 'Connection');
|
| 947 |
|
|
return;
|
| 948 |
|
|
}
|
| 949 |
|
|
|
| 950 |
|
|
// If the isUpload argument is true, setForm will call createFrame to initialize
|
| 951 |
|
|
// an iframe as the form target.
|
| 952 |
|
|
//
|
| 953 |
|
|
// The argument secureURI is also required by IE in SSL environments
|
| 954 |
|
|
// where the secureURI string is a fully qualified HTTP path, used to set the source
|
| 955 |
|
|
// of the iframe, to a stub resource in the same domain.
|
| 956 |
|
|
if(isUpload){
|
| 957 |
|
|
|
| 958 |
|
|
// Create iframe in preparation for file upload.
|
| 959 |
|
|
var io = this.createFrame(secureUri?secureUri:null);
|
| 960 |
|
|
// Set form reference and file upload properties to true.
|
| 961 |
|
|
this._isFormSubmit = true;
|
| 962 |
|
|
this._isFileUpload = true;
|
| 963 |
|
|
this._formNode = oForm;
|
| 964 |
|
|
|
| 965 |
|
|
return;
|
| 966 |
|
|
|
| 967 |
|
|
}
|
| 968 |
|
|
|
| 969 |
|
|
var oElement, oName, oValue, oDisabled;
|
| 970 |
|
|
var hasSubmit = false;
|
| 971 |
|
|
|
| 972 |
|
|
// Iterate over the form elements collection to construct the
|
| 973 |
|
|
// label-value pairs.
|
| 974 |
|
|
for (var i=0; i<oForm.elements.length; i++){
|
| 975 |
|
|
oElement = oForm.elements[i];
|
| 976 |
|
|
oDisabled = oElement.disabled;
|
| 977 |
|
|
oName = oElement.name;
|
| 978 |
|
|
oValue = oElement.value;
|
| 979 |
|
|
|
| 980 |
|
|
// Do not submit fields that are disabled or
|
| 981 |
|
|
// do not have a name attribute value.
|
| 982 |
|
|
if(!oDisabled && oName)
|
| 983 |
|
|
{
|
| 984 |
|
|
switch(oElement.type)
|
| 985 |
|
|
{
|
| 986 |
|
|
case 'select-one':
|
| 987 |
|
|
case 'select-multiple':
|
| 988 |
|
|
for(var j=0; j<oElement.options.length; j++){
|
| 989 |
|
|
if(oElement.options[j].selected){
|
| 990 |
|
|
if(window.ActiveXObject){
|
| 991 |
|
|
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oElement.options[j].attributes['value'].specified?oElement.options[j].value:oElement.options[j].text) + '&';
|
| 992 |
|
|
}
|
| 993 |
|
|
else{
|
| 994 |
|
|
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oElement.options[j].hasAttribute('value')?oElement.options[j].value:oElement.options[j].text) + '&';
|
| 995 |
|
|
}
|
| 996 |
|
|
}
|
| 997 |
|
|
}
|
| 998 |
|
|
break;
|
| 999 |
|
|
case 'radio':
|
| 1000 |
|
|
case 'checkbox':
|
| 1001 |
|
|
if(oElement.checked){
|
| 1002 |
|
|
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
|
| 1003 |
|
|
}
|
| 1004 |
|
|
break;
|
| 1005 |
|
|
case 'file':
|
| 1006 |
|
|
// stub case as XMLHttpRequest will only send the file path as a string.
|
| 1007 |
|
|
case undefined:
|
| 1008 |
|
|
// stub case for fieldset element which returns undefined.
|
| 1009 |
|
|
case 'reset':
|
| 1010 |
|
|
// stub case for input type reset button.
|
| 1011 |
|
|
case 'button':
|
| 1012 |
|
|
// stub case for input type button elements.
|
| 1013 |
|
|
break;
|
| 1014 |
|
|
case 'submit':
|
| 1015 |
|
|
if(hasSubmit === false){
|
| 1016 |
|
|
if(this._hasSubmitListener && this._submitElementValue){
|
| 1017 |
|
|
this._sFormData += this._submitElementValue + '&';
|
| 1018 |
|
|
}
|
| 1019 |
|
|
else{
|
| 1020 |
|
|
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
|
| 1021 |
|
|
}
|
| 1022 |
|
|
|
| 1023 |
|
|
hasSubmit = true;
|
| 1024 |
|
|
}
|
| 1025 |
|
|
break;
|
| 1026 |
|
|
default:
|
| 1027 |
|
|
this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
|
| 1028 |
|
|
}
|
| 1029 |
|
|
}
|
| 1030 |
|
|
}
|
| 1031 |
|
|
|
| 1032 |
|
|
this._isFormSubmit = true;
|
| 1033 |
|
|
this._sFormData = this._sFormData.substr(0, this._sFormData.length - 1);
|
| 1034 |
|
|
|
| 1035 |
|
|
YAHOO.log('Form initialized for transaction. HTML form POST message is: ' + this._sFormData, 'info', 'Connection');
|
| 1036 |
|
|
|
| 1037 |
|
|
this.initHeader('Content-Type', this._default_form_header);
|
| 1038 |
|
|
YAHOO.log('Initialize header Content-Type to application/x-www-form-urlencoded for setForm() transaction.', 'info', 'Connection');
|
| 1039 |
|
|
|
| 1040 |
|
|
return this._sFormData;
|
| 1041 |
|
|
},
|
| 1042 |
|
|
|
| 1043 |
|
|
/**
|
| 1044 |
|
|
* @description Resets HTML form properties when an HTML form or HTML form
|
| 1045 |
|
|
* with file upload transaction is sent.
|
| 1046 |
|
|
* @method resetFormState
|
| 1047 |
|
|
* @private
|
| 1048 |
|
|
* @static
|
| 1049 |
|
|
* @return {void}
|
| 1050 |
|
|
*/
|
| 1051 |
|
|
resetFormState:function(){
|
| 1052 |
|
|
this._isFormSubmit = false;
|
| 1053 |
|
|
this._isFileUpload = false;
|
| 1054 |
|
|
this._formNode = null;
|
| 1055 |
|
|
this._sFormData = "";
|
| 1056 |
|
|
},
|
| 1057 |
|
|
|
| 1058 |
|
|
/**
|
| 1059 |
|
|
* @description Creates an iframe to be used for form file uploads. It is remove from the
|
| 1060 |
|
|
* document upon completion of the upload transaction.
|
| 1061 |
|
|
* @method createFrame
|
| 1062 |
|
|
* @private
|
| 1063 |
|
|
* @static
|
| 1064 |
|
|
* @param {string} optional qualified path of iframe resource for SSL in IE.
|
| 1065 |
|
|
* @return {void}
|
| 1066 |
|
|
*/
|
| 1067 |
|
|
createFrame:function(secureUri){
|
| 1068 |
|
|
|
| 1069 |
|
|
// IE does not allow the setting of id and name attributes as object
|
| 1070 |
|
|
// properties via createElement(). A different iframe creation
|
| 1071 |
|
|
// pattern is required for IE.
|
| 1072 |
|
|
var frameId = 'yuiIO' + this._transaction_id;
|
| 1073 |
|
|
var io;
|
| 1074 |
|
|
if(window.ActiveXObject){
|
| 1075 |
|
|
io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
|
| 1076 |
|
|
|
| 1077 |
|
|
// IE will throw a security exception in an SSL environment if the
|
| 1078 |
|
|
// iframe source is undefined.
|
| 1079 |
|
|
if(typeof secureUri == 'boolean'){
|
| 1080 |
|
|
io.src = 'javascript:false';
|
| 1081 |
|
|
}
|
| 1082 |
|
|
else if(typeof secureURI == 'string'){
|
| 1083 |
|
|
// Deprecated
|
| 1084 |
|
|
io.src = secureUri;
|
| 1085 |
|
|
}
|
| 1086 |
|
|
}
|
| 1087 |
|
|
else{
|
| 1088 |
|
|
io = document.createElement('iframe');
|
| 1089 |
|
|
io.id = frameId;
|
| 1090 |
|
|
io.name = frameId;
|
| 1091 |
|
|
}
|
| 1092 |
|
|
|
| 1093 |
|
|
io.style.position = 'absolute';
|
| 1094 |
|
|
io.style.top = '-1000px';
|
| 1095 |
|
|
io.style.left = '-1000px';
|
| 1096 |
|
|
|
| 1097 |
|
|
document.body.appendChild(io);
|
| 1098 |
|
|
YAHOO.log('File upload iframe created. Id is:' + frameId, 'info', 'Connection');
|
| 1099 |
|
|
},
|
| 1100 |
|
|
|
| 1101 |
|
|
/**
|
| 1102 |
|
|
* @description Parses the POST data and creates hidden form elements
|
| 1103 |
|
|
* for each key-value, and appends them to the HTML form object.
|
| 1104 |
|
|
* @method appendPostData
|
| 1105 |
|
|
* @private
|
| 1106 |
|
|
* @static
|
| 1107 |
|
|
* @param {string} postData The HTTP POST data
|
| 1108 |
|
|
* @return {array} formElements Collection of hidden fields.
|
| 1109 |
|
|
*/
|
| 1110 |
|
|
appendPostData:function(postData)
|
| 1111 |
|
|
{
|
| 1112 |
|
|
var formElements = [];
|
| 1113 |
|
|
var postMessage = postData.split('&');
|
| 1114 |
|
|
for(var i=0; i < postMessage.length; i++){
|
| 1115 |
|
|
var delimitPos = postMessage[i].indexOf('=');
|
| 1116 |
|
|
if(delimitPos != -1){
|
| 1117 |
|
|
formElements[i] = document.createElement('input');
|
| 1118 |
|
|
formElements[i].type = 'hidden';
|
| 1119 |
|
|
formElements[i].name = postMessage[i].substring(0,delimitPos);
|
| 1120 |
|
|
formElements[i].value = postMessage[i].substring(delimitPos+1);
|
| 1121 |
|
|
this._formNode.appendChild(formElements[i]);
|
| 1122 |
|
|
}
|
| 1123 |
|
|
}
|
| 1124 |
|
|
|
| 1125 |
|
|
return formElements;
|
| 1126 |
|
|
},
|
| 1127 |
|
|
|
| 1128 |
|
|
/**
|
| 1129 |
|
|
* @description Uploads HTML form, inclusive of files/attachments, using the
|
| 1130 |
|
|
* iframe created in createFrame to facilitate the transaction.
|
| 1131 |
|
|
* @method uploadFile
|
| 1132 |
|
|
* @private
|
| 1133 |
|
|
* @static
|
| 1134 |
|
|
* @param {int} id The transaction id.
|
| 1135 |
|
|
* @param {object} callback User-defined callback object.
|
| 1136 |
|
|
* @param {string} uri Fully qualified path of resource.
|
| 1137 |
|
|
* @param {string} postData POST data to be submitted in addition to HTML form.
|
| 1138 |
|
|
* @return {void}
|
| 1139 |
|
|
*/
|
| 1140 |
|
|
uploadFile:function(o, callback, uri, postData){
|
| 1141 |
|
|
|
| 1142 |
|
|
// Each iframe has an id prefix of "yuiIO" followed
|
| 1143 |
|
|
// by the unique transaction id.
|
| 1144 |
|
|
var oConn = this;
|
| 1145 |
|
|
var frameId = 'yuiIO' + o.tId;
|
| 1146 |
|
|
var uploadEncoding = 'multipart/form-data';
|
| 1147 |
|
|
var io = document.getElementById(frameId);
|
| 1148 |
|
|
var args = (callback && callback.argument)?callback.argument:null;
|
| 1149 |
|
|
|
| 1150 |
|
|
// Track original HTML form attribute values.
|
| 1151 |
|
|
var rawFormAttributes =
|
| 1152 |
|
|
{
|
| 1153 |
|
|
action:this._formNode.getAttribute('action'),
|
| 1154 |
|
|
method:this._formNode.getAttribute('method'),
|
| 1155 |
|
|
target:this._formNode.getAttribute('target')
|
| 1156 |
|
|
};
|
| 1157 |
|
|
|
| 1158 |
|
|
// Initialize the HTML form properties in case they are
|
| 1159 |
|
|
// not defined in the HTML form.
|
| 1160 |
|
|
this._formNode.setAttribute('action', uri);
|
| 1161 |
|
|
this._formNode.setAttribute('method', 'POST');
|
| 1162 |
|
|
this._formNode.setAttribute('target', frameId);
|
| 1163 |
|
|
|
| 1164 |
|
|
if(this._formNode.encoding){
|
| 1165 |
|
|
// IE does not respect property enctype for HTML forms.
|
| 1166 |
|
|
// Instead it uses the property - "encoding".
|
| 1167 |
|
|
this._formNode.setAttribute('encoding', uploadEncoding);
|
| 1168 |
|
|
}
|
| 1169 |
|
|
else{
|
| 1170 |
|
|
this._formNode.setAttribute('enctype', uploadEncoding);
|
| 1171 |
|
|
}
|
| 1172 |
|
|
|
| 1173 |
|
|
if(postData){
|
| 1174 |
|
|
var oElements = this.appendPostData(postData);
|
| 1175 |
|
|
}
|
| 1176 |
|
|
|
| 1177 |
|
|
// Start file upload.
|
| 1178 |
|
|
this._formNode.submit();
|
| 1179 |
|
|
|
| 1180 |
|
|
// Fire global custom event -- startEvent
|
| 1181 |
|
|
this.startEvent.fire(o, args);
|
| 1182 |
|
|
|
| 1183 |
|
|
if(o.startEvent){
|
| 1184 |
|
|
// Fire transaction custom event -- startEvent
|
| 1185 |
|
|
o.startEvent.fire(o, args);
|
| 1186 |
|
|
}
|
| 1187 |
|
|
|
| 1188 |
|
|
// Start polling if a callback is present and the timeout
|
| 1189 |
|
|
// property has been defined.
|
| 1190 |
|
|
if(callback && callback.timeout){
|
| 1191 |
|
|
this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true); }, callback.timeout);
|
| 1192 |
|
|
}
|
| 1193 |
|
|
|
| 1194 |
|
|
// Remove HTML elements created by appendPostData
|
| 1195 |
|
|
if(oElements && oElements.length > 0){
|
| 1196 |
|
|
for(var i=0; i < oElements.length; i++){
|
| 1197 |
|
|
this._formNode.removeChild(oElements[i]);
|
| 1198 |
|
|
}
|
| 1199 |
|
|
}
|
| 1200 |
|
|
|
| 1201 |
|
|
// Restore HTML form attributes to their original
|
| 1202 |
|
|
// values prior to file upload.
|
| 1203 |
|
|
for(var prop in rawFormAttributes){
|
| 1204 |
|
|
if(YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)){
|
| 1205 |
|
|
if(rawFormAttributes[prop]){
|
| 1206 |
|
|
this._formNode.setAttribute(prop, rawFormAttributes[prop]);
|
| 1207 |
|
|
}
|
| 1208 |
|
|
else{
|
| 1209 |
|
|
this._formNode.removeAttribute(prop);
|
| 1210 |
|
|
}
|
| 1211 |
|
|
}
|
| 1212 |
|
|
}
|
| 1213 |
|
|
|
| 1214 |
|
|
// Reset HTML form state properties.
|
| 1215 |
|
|
this.resetFormState();
|
| 1216 |
|
|
|
| 1217 |
|
|
// Create the upload callback handler that fires when the iframe
|
| 1218 |
|
|
// receives the load event. Subsequently, the event handler is detached
|
| 1219 |
|
|
// and the iframe removed from the document.
|
| 1220 |
|
|
var uploadCallback = function()
|
| 1221 |
|
|
{
|
| 1222 |
|
|
if(callback && callback.timeout){
|
| 1223 |
|
|
window.clearTimeout(oConn._timeOut[o.tId]);
|
| 1224 |
|
|
delete oConn._timeOut[o.tId];
|
| 1225 |
|
|
}
|
| 1226 |
|
|
|
| 1227 |
|
|
// Fire global custom event -- completeEvent
|
| 1228 |
|
|
oConn.completeEvent.fire(o, args);
|
| 1229 |
|
|
|
| 1230 |
|
|
if(o.completeEvent){
|
| 1231 |
|
|
// Fire transaction custom event -- completeEvent
|
| 1232 |
|
|
o.completeEvent.fire(o, args);
|
| 1233 |
|
|
}
|
| 1234 |
|
|
|
| 1235 |
|
|
var obj = {};
|
| 1236 |
|
|
obj.tId = o.tId;
|
| 1237 |
|
|
obj.argument = callback.argument;
|
| 1238 |
|
|
|
| 1239 |
|
|
try
|
| 1240 |
|
|
{
|
| 1241 |
|
|
// responseText and responseXML will be populated with the same data from the iframe.
|
| 1242 |
|
|
// Since the HTTP headers cannot be read from the iframe
|
| 1243 |
|
|
obj.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:io.contentWindow.document.documentElement.textContent;
|
| 1244 |
|
|
obj.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
|
| 1245 |
|
|
}
|
| 1246 |
|
|
catch(e){}
|
| 1247 |
|
|
|
| 1248 |
|
|
if(callback && callback.upload){
|
| 1249 |
|
|
if(!callback.scope){
|
| 1250 |
|
|
callback.upload(obj);
|
| 1251 |
|
|
YAHOO.log('Upload callback.', 'info', 'Connection');
|
| 1252 |
|
|
}
|
| 1253 |
|
|
else{
|
| 1254 |
|
|
callback.upload.apply(callback.scope, [obj]);
|
| 1255 |
|
|
YAHOO.log('Upload callback with scope.', 'info', 'Connection');
|
| 1256 |
|
|
}
|
| 1257 |
|
|
}
|
| 1258 |
|
|
|
| 1259 |
|
|
// Fire global custom event -- uploadEvent
|
| 1260 |
|
|
oConn.uploadEvent.fire(obj);
|
| 1261 |
|
|
|
| 1262 |
|
|
if(o.uploadEvent){
|
| 1263 |
|
|
// Fire transaction custom event -- uploadEvent
|
| 1264 |
|
|
o.uploadEvent.fire(obj);
|
| 1265 |
|
|
}
|
| 1266 |
|
|
|
| 1267 |
|
|
YAHOO.util.Event.removeListener(io, "load", uploadCallback);
|
| 1268 |
|
|
|
| 1269 |
|
|
setTimeout(
|
| 1270 |
|
|
function(){
|
| 1271 |
|
|
document.body.removeChild(io);
|
| 1272 |
|
|
oConn.releaseObject(o);
|
| 1273 |
|
|
YAHOO.log('File upload iframe destroyed. Id is:' + frameId, 'info', 'Connection');
|
| 1274 |
|
|
}, 100);
|
| 1275 |
|
|
};
|
| 1276 |
|
|
|
| 1277 |
|
|
// Bind the onload handler to the iframe to detect the file upload response.
|
| 1278 |
|
|
YAHOO.util.Event.addListener(io, "load", uploadCallback);
|
| 1279 |
|
|
},
|
| 1280 |
|
|
|
| 1281 |
|
|
/**
|
| 1282 |
|
|
* @description Method to terminate a transaction, if it has not reached readyState 4.
|
| 1283 |
|
|
* @method abort
|
| 1284 |
|
|
* @public
|
| 1285 |
|
|
* @static
|
| 1286 |
|
|
* @param {object} o The connection object returned by asyncRequest.
|
| 1287 |
|
|
* @param {object} callback User-defined callback object.
|
| 1288 |
|
|
* @param {string} isTimeout boolean to indicate if abort resulted from a callback timeout.
|
| 1289 |
|
|
* @return {boolean}
|
| 1290 |
|
|
*/
|
| 1291 |
|
|
abort:function(o, callback, isTimeout)
|
| 1292 |
|
|
{
|
| 1293 |
|
|
var abortStatus;
|
| 1294 |
|
|
var args = (callback && callback.argument)?callback.argument:null;
|
| 1295 |
|
|
|
| 1296 |
|
|
|
| 1297 |
|
|
if(o && o.conn){
|
| 1298 |
|
|
if(this.isCallInProgress(o)){
|
| 1299 |
|
|
// Issue abort request
|
| 1300 |
|
|
o.conn.abort();
|
| 1301 |
|
|
|
| 1302 |
|
|
window.clearInterval(this._poll[o.tId]);
|
| 1303 |
|
|
delete this._poll[o.tId];
|
| 1304 |
|
|
|
| 1305 |
|
|
if(isTimeout){
|
| 1306 |
|
|
window.clearTimeout(this._timeOut[o.tId]);
|
| 1307 |
|
|
delete this._timeOut[o.tId];
|
| 1308 |
|
|
}
|
| 1309 |
|
|
|
| 1310 |
|
|
abortStatus = true;
|
| 1311 |
|
|
}
|
| 1312 |
|
|
}
|
| 1313 |
|
|
else if(o && o.isUpload === true){
|
| 1314 |
|
|
var frameId = 'yuiIO' + o.tId;
|
| 1315 |
|
|
var io = document.getElementById(frameId);
|
| 1316 |
|
|
|
| 1317 |
|
|
if(io){
|
| 1318 |
|
|
// Remove all listeners on the iframe prior to
|
| 1319 |
|
|
// its destruction.
|
| 1320 |
|
|
YAHOO.util.Event.removeListener(io, "load");
|
| 1321 |
|
|
// Destroy the iframe facilitating the transaction.
|
| 1322 |
|
|
document.body.removeChild(io);
|
| 1323 |
|
|
YAHOO.log('File upload iframe destroyed. Id is:' + frameId, 'info', 'Connection');
|
| 1324 |
|
|
|
| 1325 |
|
|
if(isTimeout){
|
| 1326 |
|
|
window.clearTimeout(this._timeOut[o.tId]);
|
| 1327 |
|
|
delete this._timeOut[o.tId];
|
| 1328 |
|
|
}
|
| 1329 |
|
|
|
| 1330 |
|
|
abortStatus = true;
|
| 1331 |
|
|
}
|
| 1332 |
|
|
}
|
| 1333 |
|
|
else{
|
| 1334 |
|
|
abortStatus = false;
|
| 1335 |
|
|
}
|
| 1336 |
|
|
|
| 1337 |
|
|
if(abortStatus === true){
|
| 1338 |
|
|
// Fire global custom event -- abortEvent
|
| 1339 |
|
|
this.abortEvent.fire(o, args);
|
| 1340 |
|
|
|
| 1341 |
|
|
if(o.abortEvent){
|
| 1342 |
|
|
// Fire transaction custom event -- abortEvent
|
| 1343 |
|
|
o.abortEvent.fire(o, args);
|
| 1344 |
|
|
}
|
| 1345 |
|
|
|
| 1346 |
|
|
this.handleTransactionResponse(o, callback, true);
|
| 1347 |
|
|
YAHOO.log('Transaction ' + o.tId + ' aborted.', 'info', 'Connection');
|
| 1348 |
|
|
}
|
| 1349 |
|
|
|
| 1350 |
|
|
return abortStatus;
|
| 1351 |
|
|
},
|
| 1352 |
|
|
|
| 1353 |
|
|
/**
|
| 1354 |
|
|
* @description Determines if the transaction is still being processed.
|
| 1355 |
|
|
* @method isCallInProgress
|
| 1356 |
|
|
* @public
|
| 1357 |
|
|
* @static
|
| 1358 |
|
|
* @param {object} o The connection object returned by asyncRequest
|
| 1359 |
|
|
* @return {boolean}
|
| 1360 |
|
|
*/
|
| 1361 |
|
|
isCallInProgress:function(o)
|
| 1362 |
|
|
{
|
| 1363 |
|
|
// if the XHR object assigned to the transaction has not been dereferenced,
|
| 1364 |
|
|
// then check its readyState status. Otherwise, return false.
|
| 1365 |
|
|
if(o && o.conn){
|
| 1366 |
|
|
return o.conn.readyState !== 4 && o.conn.readyState !== 0;
|
| 1367 |
|
|
}
|
| 1368 |
|
|
else if(o && o.isUpload === true){
|
| 1369 |
|
|
var frameId = 'yuiIO' + o.tId;
|
| 1370 |
|
|
return document.getElementById(frameId)?true:false;
|
| 1371 |
|
|
}
|
| 1372 |
|
|
else{
|
| 1373 |
|
|
return false;
|
| 1374 |
|
|
}
|
| 1375 |
|
|
},
|
| 1376 |
|
|
|
| 1377 |
|
|
/**
|
| 1378 |
|
|
* @description Dereference the XHR instance and the connection object after the transaction is completed.
|
| 1379 |
|
|
* @method releaseObject
|
| 1380 |
|
|
* @private
|
| 1381 |
|
|
* @static
|
| 1382 |
|
|
* @param {object} o The connection object
|
| 1383 |
|
|
* @return {void}
|
| 1384 |
|
|
*/
|
| 1385 |
|
|
releaseObject:function(o)
|
| 1386 |
|
|
{
|
| 1387 |
|
|
if(o && o.conn){
|
| 1388 |
|
|
//dereference the XHR instance.
|
| 1389 |
|
|
o.conn = null;
|
| 1390 |
|
|
|
| 1391 |
|
|
YAHOO.log('Connection object for transaction ' + o.tId + ' destroyed.', 'info', 'Connection');
|
| 1392 |
|
|
|
| 1393 |
|
|
//dereference the connection object.
|
| 1394 |
|
|
o = null;
|
| 1395 |
|
|
}
|
| 1396 |
|
|
}
|
| 1397 |
|
|
};
|
| 1398 |
|
|
|
| 1399 |
|
|
YAHOO.register("connection", YAHOO.util.Connect, {version: "2.4.1", build: "742"});
|