1410 lines
40 KiB
JavaScript
1410 lines
40 KiB
JavaScript
/*
|
|
Copyright (c) 2008, Yahoo! Inc. All rights reserved.
|
|
Code licensed under the BSD License:
|
|
http://developer.yahoo.net/yui/license.txt
|
|
version: 2.6.0
|
|
*/
|
|
/**
|
|
* 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);
|
|
if(obj.nodeName.toLowerCase() == 'input' && (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);
|
|
YAHOO.log('ActiveX Program Id ' + id + ' added to _msxml_progid.', 'info', 'Connection');
|
|
},
|
|
|
|
/**
|
|
* @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;
|
|
YAHOO.log('Default POST header set to ' + b, 'info', 'Connection');
|
|
}
|
|
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;
|
|
YAHOO.log('Default XHR header set to ' + b, 'info', 'Connection');
|
|
}
|
|
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;
|
|
YAHOO.log('Default polling interval set to ' + i +'ms', 'info', 'Connection');
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @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 };
|
|
YAHOO.log('XHR object created for transaction ' + transactionId, 'info', 'Connection');
|
|
}
|
|
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 };
|
|
YAHOO.log('ActiveX XHR object created for transaction ' + transactionId, 'info', 'Connection');
|
|
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){
|
|
YAHOO.log('Unable to create connection object.', 'error', 'Connection');
|
|
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);
|
|
YAHOO.log('Initialize transaction header X-Request-Header to XMLHttpRequest.', 'info', 'Connection');
|
|
}
|
|
}
|
|
|
|
//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);
|
|
YAHOO.log('Initialize header Content-Type to application/x-www-form-urlencoded; UTF-8 for POST transaction.', 'info', 'Connection');
|
|
}
|
|
|
|
//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 || '');
|
|
YAHOO.log('Transaction ' + o.tId + ' sent.', 'info', 'Connection');
|
|
|
|
|
|
// 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);
|
|
YAHOO.log('Transaction-specific Custom Event ' + o[this._customEvents[prop][1]] + ' created.', 'info', 'Connection');
|
|
|
|
// Subscribe the custom event
|
|
o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
|
|
YAHOO.log('Transaction-specific Custom Event ' + o[this._customEvents[prop][1]] + ' subscribed.', 'info', 'Connection');
|
|
}
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @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);
|
|
YAHOO.log('Success callback. HTTP code is ' + httpStatus, 'info', 'Connection');
|
|
}
|
|
else{
|
|
// If a scope property is defined, the callback will be fired from
|
|
// the context of the object.
|
|
callback.success.apply(callback.scope, [responseObject]);
|
|
YAHOO.log('Success callback with scope. HTTP code is ' + httpStatus, 'info', 'Connection');
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
YAHOO.log('Failure callback. Exception detected. Status code is ' + httpStatus, 'warn', 'Connection');
|
|
}
|
|
else{
|
|
callback.failure.apply(callback.scope, [responseObject]);
|
|
YAHOO.log('Failure callback with scope. Exception detected. Status code is ' + httpStatus, 'warn', 'Connection');
|
|
}
|
|
}
|
|
|
|
break;
|
|
default:
|
|
responseObject = this.createResponseObject(o, args);
|
|
if(callback && callback.failure){
|
|
if(!callback.scope){
|
|
callback.failure(responseObject);
|
|
YAHOO.log('Failure callback. HTTP status code is ' + httpStatus, 'warn', 'Connection');
|
|
}
|
|
else{
|
|
callback.failure.apply(callback.scope, [responseObject]);
|
|
YAHOO.log('Failure callback with scope. HTTP status code is ' + httpStatus, 'warn', 'Connection');
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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]);
|
|
YAHOO.log('Default HTTP header ' + prop + ' set with value of ' + this._default_headers[prop], 'info', 'Connection');
|
|
}
|
|
}
|
|
}
|
|
|
|
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]);
|
|
YAHOO.log('HTTP header ' + prop + ' set with value of ' + this._http_headers[prop], 'info', 'Connection');
|
|
}
|
|
}
|
|
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{
|
|
YAHOO.log('Unable to create form object ' + formId, 'warn', 'Connection');
|
|
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;
|
|
}
|
|
else{
|
|
data[item++] = oName + oValue;
|
|
}
|
|
|
|
hasSubmit = true;
|
|
}
|
|
break;
|
|
default:
|
|
data[item++] = oName + oValue;
|
|
}
|
|
}
|
|
}
|
|
|
|
this._isFormSubmit = true;
|
|
this._sFormData = data.join('&');
|
|
|
|
YAHOO.log('Form initialized for transaction. HTML form POST message is: ' + this._sFormData, 'info', 'Connection');
|
|
|
|
this.initHeader('Content-Type', this._default_form_header);
|
|
YAHOO.log('Initialize header Content-Type to application/x-www-form-urlencoded for setForm() transaction.', 'info', 'Connection');
|
|
|
|
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);
|
|
YAHOO.log('File upload iframe created. Id is:' + frameId, 'info', 'Connection');
|
|
},
|
|
|
|
/**
|
|
* @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);
|
|
YAHOO.log('Upload callback.', 'info', 'Connection');
|
|
}
|
|
else{
|
|
callback.upload.apply(callback.scope, [obj]);
|
|
YAHOO.log('Upload callback with scope.', 'info', 'Connection');
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
YAHOO.log('File upload iframe destroyed. Id is:' + frameId, 'info', 'Connection');
|
|
}, 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);
|
|
YAHOO.log('File upload iframe destroyed. Id is:' + frameId, 'info', 'Connection');
|
|
|
|
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);
|
|
YAHOO.log('Transaction ' + o.tId + ' aborted.', 'info', 'Connection');
|
|
}
|
|
|
|
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;
|
|
|
|
YAHOO.log('Connection object for transaction ' + o.tId + ' destroyed.', 'info', 'Connection');
|
|
|
|
//dereference the connection object.
|
|
o = null;
|
|
}
|
|
}
|
|
};
|
|
YAHOO.register("connection", YAHOO.util.Connect, {version: "2.6.0", build: "1321"});
|