(function( jQuery ) {
-var // Next active xhr id
+var // #5280: next active xhr id and list of active xhrs' callbacks
xhrId = jQuery.now(),
-
- // active xhrs
- xhrs = {},
-
- // #5280: see below
- xhrUnloadAbortInstalled,
+ xhrCallbacks,
// XHR used to determine supports properties
testXHR;
+// #5280: Internet Explorer will keep connections alive if we don't abort on unload
+function xhrOnUnloadAbort() {
+ jQuery( window ).unload(function() {
+ // Abort all pending requests
+ for ( var key in xhrCallbacks ) {
+ xhrCallbacks[ key ]( 0, 1 );
+ }
+ });
+}
+
+// Functions to create xhrs
+function createStandardXHR() {
+ try {
+ return new window.XMLHttpRequest();
+ } catch( e ) {}
+}
+
+function createActiveXHR() {
+ try {
+ return new window.ActiveXObject( "Microsoft.XMLHTTP" );
+ } catch( e ) {}
+}
+
// Create the request object
// (This is still attached to ajaxSettings for backward compatibility)
jQuery.ajaxSettings.xhr = window.ActiveXObject ?
* we need a fallback.
*/
function() {
- if ( window.location.protocol !== "file:" ) {
- try {
- return new window.XMLHttpRequest();
- } catch( xhrError ) {}
- }
-
- try {
- return new window.ActiveXObject("Microsoft.XMLHTTP");
- } catch( activeError ) {}
+ return !this.isLocal && createStandardXHR() || createActiveXHR();
} :
// For all other browsers, use the standard XMLHttpRequest object
- function() {
- return new window.XMLHttpRequest();
- };
+ createStandardXHR;
// Test if we can create an xhr object
-try {
- testXHR = jQuery.ajaxSettings.xhr();
-} catch( xhrCreationException ) {}
-
-//Does this browser support XHR requests?
+testXHR = jQuery.ajaxSettings.xhr();
jQuery.support.ajax = !!testXHR;
// Does this browser support crossDomain XHR requests
return {
send: function( headers, complete ) {
- // #5280: we need to abort on unload or IE will keep connections alive
- if ( !xhrUnloadAbortInstalled ) {
-
- xhrUnloadAbortInstalled = 1;
-
- jQuery(window).bind( "unload", function() {
-
- // Abort all pending requests
- jQuery.each( xhrs, function( _, xhr ) {
- if ( xhr.onreadystatechange ) {
- xhr.onreadystatechange( 1 );
- }
- } );
-
- } );
- }
-
// Get a new xhr
var xhr = s.xhr(),
- handle;
+ handle,
+ i;
// Open the socket
// Passing null username, generates a login popup on Opera (#2865)
xhr.open( s.type, s.url, s.async );
}
- // Requested-With header
- // Not set for crossDomain requests with no content
- // (see why at http://trac.dojotoolkit.org/ticket/9486)
- // Won't change header if already provided
- if ( !( s.crossDomain && !s.hasContent ) && !headers["x-requested-with"] ) {
- headers[ "x-requested-with" ] = "XMLHttpRequest";
+ // Apply custom fields if provided
+ if ( s.xhrFields ) {
+ for ( i in s.xhrFields ) {
+ xhr[ i ] = s.xhrFields[ i ];
+ }
+ }
+
+ // Override mime type if needed
+ if ( s.mimeType && xhr.overrideMimeType ) {
+ xhr.overrideMimeType( s.mimeType );
+ }
+
+ // X-Requested-With header
+ // For cross-domain requests, seeing as conditions for a preflight are
+ // akin to a jigsaw puzzle, we simply never set it to be sure.
+ // (it can always be set on a per-request basis or even using ajaxSetup)
+ // For same-domain requests, won't change header if already provided.
+ if ( !s.crossDomain && !headers["X-Requested-With"] ) {
+ headers[ "X-Requested-With" ] = "XMLHttpRequest";
}
// Need an extra try/catch for cross domain requests in Firefox 3
try {
- jQuery.each( headers, function( key, value ) {
- xhr.setRequestHeader( key, value );
- } );
+ for ( i in headers ) {
+ xhr.setRequestHeader( i, headers[ i ] );
+ }
} catch( _ ) {}
// Do send the request
- try {
- xhr.send( ( s.hasContent && s.data ) || null );
- } catch( e ) {
- complete( 0, "error", "" + e );
- return;
- }
+ // This may raise an exception which is actually
+ // handled in jQuery.ajax (so no try/catch here)
+ xhr.send( ( s.hasContent && s.data ) || null );
// Listener
callback = function( _, isAbort ) {
- // Was never called and is aborted or complete
- if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
+ var status,
+ statusText,
+ responseHeaders,
+ responses,
+ xml;
- // Only called once
- callback = 0;
+ // Firefox throws exceptions when accessing properties
+ // of an xhr when a network error occured
+ // http://helpful.knobs-dials.com/index.php/Component_returned_failure_code:_0x80040111_(NS_ERROR_NOT_AVAILABLE)
+ try {
- // Do not keep as active anymore
- if ( handle ) {
- xhr.onreadystatechange = jQuery.noop;
- delete xhrs[ handle ];
- }
+ // Was never called and is aborted or complete
+ if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
+
+ // Only called once
+ callback = undefined;
- // If it's an abort
- if ( isAbort ) {
- // Abort it manually if needed
- if ( xhr.readyState !== 4 ) {
- xhr.abort();
+ // Do not keep as active anymore
+ if ( handle ) {
+ xhr.onreadystatechange = jQuery.noop;
+ delete xhrCallbacks[ handle ];
}
- } else {
- // Get info
- var status = xhr.status,
- statusText,
- responseHeaders = xhr.getAllResponseHeaders(),
- responses = {},
+
+ // If it's an abort
+ if ( isAbort ) {
+ // Abort it manually if needed
+ if ( xhr.readyState !== 4 ) {
+ xhr.abort();
+ }
+ } else {
+ status = xhr.status;
+ responseHeaders = xhr.getAllResponseHeaders();
+ responses = {};
xml = xhr.responseXML;
- // Construct response list
- if ( xml && xml.documentElement /* #4958 */ ) {
- responses.xml = xml;
- }
- responses.text = xhr.responseText;
-
- // Firefox throws an exception when accessing
- // statusText for faulty cross-domain requests
- try {
- statusText = xhr.statusText;
- } catch( e ) {
- // We normalize with Webkit giving an empty statusText
- statusText = "";
+ // Construct response list
+ if ( xml && xml.documentElement /* #4958 */ ) {
+ responses.xml = xml;
+ }
+ responses.text = xhr.responseText;
+
+ // Firefox throws an exception when accessing
+ // statusText for faulty cross-domain requests
+ try {
+ statusText = xhr.statusText;
+ } catch( e ) {
+ // We normalize with Webkit giving an empty statusText
+ statusText = "";
+ }
+
+ // Filter status for non standard behaviors
+
+ // If the request is local and we have data: assume a success
+ // (success with no data won't get notified, that's the best we
+ // can do given current implementations)
+ if ( !status && s.isLocal && !s.crossDomain ) {
+ status = responses.text ? 200 : 404;
+ // IE - #1450: sometimes returns 1223 when it should be 204
+ } else if ( status === 1223 ) {
+ status = 204;
+ }
}
-
- // Filter status for non standard behaviours
- status =
- // Opera returns 0 when it should be 304
- // Webkit returns 0 for failing cross-domain no matter the real status
- status === 0 ?
- (
- // Webkit, Firefox: filter out faulty cross-domain requests
- !s.crossDomain || statusText ?
- (
- // Opera: filter out real aborts #6060
- responseHeaders ?
- 304 :
- 0
- ) :
- // We assume 302 but could be anything cross-domain related
- 302
- ) :
- (
- // IE sometimes returns 1223 when it should be 204 (see #1450)
- status == 1223 ?
- 204 :
- status
- );
-
- // Call complete
- complete( status, statusText, responses, responseHeaders );
+ }
+ } catch( firefoxAccessException ) {
+ if ( !isAbort ) {
+ complete( -1, firefoxAccessException );
}
}
+
+ // Call complete if needed
+ if ( responses ) {
+ complete( status, statusText, responses, responseHeaders );
+ }
};
// if we're in sync mode or it's in cache
if ( !s.async || xhr.readyState === 4 ) {
callback();
} else {
- // Add to list of active xhrs
+ // Create the active xhrs callbacks list if needed
+ // and attach the unload handler
+ if ( !xhrCallbacks ) {
+ xhrCallbacks = {};
+ xhrOnUnloadAbort();
+ }
+ // Add to list of active xhrs callbacks
handle = xhrId++;
- xhrs[ handle ] = xhr;
- xhr.onreadystatechange = callback;
+ xhr.onreadystatechange = xhrCallbacks[ handle ] = callback;
}
},