2010-12-09 19:34:28 +01:00
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(function( jQuery ) {
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2011-02-03 06:12:47 +01:00
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// Functions to create xhrs
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function createStandardXHR() {
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try {
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return new window.XMLHttpRequest();
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} catch( e ) {}
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}
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function createActiveXHR() {
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try {
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return new window.ActiveXObject("Microsoft.XMLHTTP");
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} catch( e ) {}
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}
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2011-01-13 16:58:16 +01:00
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var // Next active xhr id
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xhrId = jQuery.now(),
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2011-01-05 22:41:23 +01:00
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2011-01-13 16:58:16 +01:00
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// active xhrs
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2010-12-09 19:34:28 +01:00
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xhrs = {},
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2011-01-13 02:05:39 +01:00
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// #5280: see below
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2011-01-19 16:55:26 +01:00
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xhrUnloadAbortInstalled,
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2010-12-09 19:34:28 +01:00
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2011-01-19 16:55:26 +01:00
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// XHR used to determine supports properties
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2011-02-03 18:22:37 +01:00
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testXHR;
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2011-01-05 22:41:23 +01:00
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2011-01-20 17:38:21 +01:00
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// Create the request object
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// (This is still attached to ajaxSettings for backward compatibility)
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2011-01-19 16:55:26 +01:00
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jQuery.ajaxSettings.xhr = window.ActiveXObject ?
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/* Microsoft failed to properly
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* implement the XMLHttpRequest in IE7 (can't request local files),
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* so we use the ActiveXObject when it is available
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* Additionally XMLHttpRequest can be disabled in IE7/IE8 so
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* we need a fallback.
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*/
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2011-02-03 18:22:37 +01:00
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function() {
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return !this.isLocal && createStandardXHR() || createActiveXHR();
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} :
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2011-01-19 16:55:26 +01:00
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// For all other browsers, use the standard XMLHttpRequest object
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2011-02-03 06:12:47 +01:00
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createStandardXHR;
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Test if we can create an xhr object
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2011-02-03 06:12:47 +01:00
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testXHR = jQuery.ajaxSettings.xhr();
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2011-01-19 16:55:26 +01:00
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jQuery.support.ajax = !!testXHR;
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Does this browser support crossDomain XHR requests
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2011-01-23 05:51:41 +01:00
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jQuery.support.cors = testXHR && ( "withCredentials" in testXHR );
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// No need for the temporary xhr anymore
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testXHR = undefined;
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2011-01-09 22:20:58 +01:00
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2011-01-19 16:55:26 +01:00
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// Create transport if the browser can provide an xhr
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if ( jQuery.support.ajax ) {
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2011-01-09 22:20:58 +01:00
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2011-01-23 05:51:41 +01:00
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jQuery.ajaxTransport(function( s ) {
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2011-01-19 16:55:26 +01:00
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// Cross domain only allowed if supported through XMLHttpRequest
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2011-01-23 05:51:41 +01:00
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if ( !s.crossDomain || jQuery.support.cors ) {
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2011-01-09 22:20:58 +01:00
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2011-01-19 16:55:26 +01:00
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var callback;
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2011-01-09 22:20:58 +01:00
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2011-01-19 16:55:26 +01:00
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return {
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2011-01-23 05:51:41 +01:00
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send: function( headers, complete ) {
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// #5280: we need to abort on unload or IE will keep connections alive
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2011-01-23 05:51:41 +01:00
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if ( !xhrUnloadAbortInstalled ) {
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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xhrUnloadAbortInstalled = 1;
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2011-01-23 05:51:41 +01:00
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jQuery(window).bind( "unload", function() {
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Abort all pending requests
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2011-01-23 05:51:41 +01:00
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jQuery.each( xhrs, function( _, xhr ) {
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2011-01-19 16:55:26 +01:00
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if ( xhr.onreadystatechange ) {
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xhr.onreadystatechange( 1 );
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}
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2011-01-23 05:51:41 +01:00
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} );
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2011-01-05 22:41:23 +01:00
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2011-01-23 05:51:41 +01:00
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} );
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2011-01-19 16:55:26 +01:00
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}
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Get a new xhr
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var xhr = s.xhr(),
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2011-02-02 21:16:26 +01:00
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handle,
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i;
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2011-01-19 16:55:26 +01:00
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// Open the socket
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// Passing null username, generates a login popup on Opera (#2865)
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if ( s.username ) {
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2011-01-23 05:51:41 +01:00
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xhr.open( s.type, s.url, s.async, s.username, s.password );
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2011-01-19 16:55:26 +01:00
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} else {
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2011-01-23 05:51:41 +01:00
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xhr.open( s.type, s.url, s.async );
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2011-01-19 16:55:26 +01:00
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}
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2011-01-05 22:41:23 +01:00
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2011-02-03 03:02:11 +01:00
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// Apply custom fields if provided
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if ( s.xhrFields ) {
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for ( i in s.xhrFields ) {
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xhr[ i ] = s.xhrFields[ i ];
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}
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}
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2011-01-19 16:55:26 +01:00
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// Requested-With header
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// Not set for crossDomain requests with no content
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// (see why at http://trac.dojotoolkit.org/ticket/9486)
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// Won't change header if already provided
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2011-01-23 05:51:41 +01:00
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if ( !( s.crossDomain && !s.hasContent ) && !headers["x-requested-with"] ) {
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headers[ "x-requested-with" ] = "XMLHttpRequest";
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2011-01-19 16:55:26 +01:00
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}
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Need an extra try/catch for cross domain requests in Firefox 3
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try {
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2011-01-23 05:51:41 +01:00
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jQuery.each( headers, function( key, value ) {
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xhr.setRequestHeader( key, value );
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} );
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} catch( _ ) {}
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Do send the request
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2011-01-25 16:08:19 +01:00
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// This may raise an exception which is actually
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// handled in jQuery.ajax (so no try/catch here)
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xhr.send( ( s.hasContent && s.data ) || null );
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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// Listener
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2011-01-23 05:51:41 +01:00
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callback = function( _, isAbort ) {
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2011-01-19 16:55:26 +01:00
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2011-02-02 13:33:02 +01:00
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var status,
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statusText,
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responseHeaders,
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responses,
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xml;
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// Firefox throws exceptions when accessing properties
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// of an xhr when a network error occured
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// http://helpful.knobs-dials.com/index.php/Component_returned_failure_code:_0x80040111_(NS_ERROR_NOT_AVAILABLE)
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try {
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// Was never called and is aborted or complete
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if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
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// Only called once
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callback = undefined;
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// Do not keep as active anymore
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if ( handle ) {
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xhr.onreadystatechange = jQuery.noop;
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delete xhrs[ handle ];
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2011-01-19 16:55:26 +01:00
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}
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2011-01-05 22:41:23 +01:00
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2011-02-02 13:33:02 +01:00
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// If it's an abort
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if ( isAbort ) {
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// Abort it manually if needed
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if ( xhr.readyState !== 4 ) {
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xhr.abort();
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}
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} else {
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// Get info
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status = xhr.status;
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responseHeaders = xhr.getAllResponseHeaders();
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responses = {};
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xml = xhr.responseXML;
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2011-01-19 16:55:26 +01:00
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2011-02-02 13:33:02 +01:00
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// Construct response list
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if ( xml && xml.documentElement /* #4958 */ ) {
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responses.xml = xml;
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}
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responses.text = xhr.responseText;
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// Firefox throws an exception when accessing
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// statusText for faulty cross-domain requests
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try {
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statusText = xhr.statusText;
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} catch( e ) {
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// We normalize with Webkit giving an empty statusText
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statusText = "";
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}
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// Filter status for non standard behaviors
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2011-02-03 02:53:10 +01:00
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// IE - #1450: sometimes returns 1223 when it should be 204
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if ( status === 1223 ) {
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status = 204;
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// Status 0 encompasses several cases
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} else if ( !status ) {
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// Cross-domain
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if ( s.crossDomain ) {
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if ( !s.statusText ) {
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// FF, Webkit (other?): There is no status text for errors
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// 302 is the most generic cross-domain status code
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// for errors, could be anything really (even a real 0)
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status = 302;
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}
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2011-02-03 06:12:47 +01:00
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// All same-domain: for local files, 0 is a success
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2011-02-03 18:22:37 +01:00
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} else if( s.isLocal ) {
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2011-02-03 02:53:10 +01:00
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status = 200;
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2011-02-03 06:12:47 +01:00
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// Opera: this notifies success for all requests
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// (verified in 11.01). Patch welcome.
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2011-02-03 02:53:10 +01:00
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}
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// Opera - #6060: sets status as 0 for 304
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2011-02-03 06:12:47 +01:00
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// Patch welcome.
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2011-02-03 02:53:10 +01:00
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}
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2011-02-02 13:33:02 +01:00
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}
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2011-01-19 16:55:26 +01:00
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}
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2011-02-02 13:33:02 +01:00
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} catch( firefoxAccessException ) {
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if ( !isAbort ) {
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complete( -1, firefoxAccessException );
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}
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}
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// Call complete if needed
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if ( responses ) {
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complete( status, statusText, responses, responseHeaders );
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2011-01-13 02:05:39 +01:00
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}
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2011-01-19 16:55:26 +01:00
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};
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2011-01-05 22:41:23 +01:00
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2011-01-23 05:51:41 +01:00
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// if we're in sync mode or it's in cache
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// and has been retrieved directly (IE6 & IE7)
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2011-01-19 16:55:26 +01:00
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// we need to manually fire the callback
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2011-01-23 05:51:41 +01:00
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if ( !s.async || xhr.readyState === 4 ) {
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2011-01-19 16:55:26 +01:00
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callback();
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} else {
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// Add to list of active xhrs
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handle = xhrId++;
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xhrs[ handle ] = xhr;
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xhr.onreadystatechange = callback;
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}
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},
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2011-01-05 22:41:23 +01:00
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2011-01-19 16:55:26 +01:00
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abort: function() {
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if ( callback ) {
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callback(0,1);
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}
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2010-12-09 19:34:28 +01:00
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}
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2011-01-19 16:55:26 +01:00
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};
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}
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});
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}
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2010-12-09 19:34:28 +01:00
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2010-12-10 03:14:03 +01:00
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})( jQuery );
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