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-rw-r--r--src/ajax/xhr.js367
1 files changed, 203 insertions, 164 deletions
diff --git a/src/ajax/xhr.js b/src/ajax/xhr.js
index 34aa832fe..5dbc33d3f 100644
--- a/src/ajax/xhr.js
+++ b/src/ajax/xhr.js
@@ -1,183 +1,222 @@
(function( jQuery ) {
-var // Next active xhr id
+var // #5280: next active xhr id and list of active xhrs' callbacks
xhrId = jQuery.now(),
+ 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 ?
+ /* Microsoft failed to properly
+ * implement the XMLHttpRequest in IE7 (can't request local files),
+ * so we use the ActiveXObject when it is available
+ * Additionally XMLHttpRequest can be disabled in IE7/IE8 so
+ * we need a fallback.
+ */
+ function() {
+ return !this.isLocal && createStandardXHR() || createActiveXHR();
+ } :
+ // For all other browsers, use the standard XMLHttpRequest object
+ createStandardXHR;
+
+// Test if we can create an xhr object
+testXHR = jQuery.ajaxSettings.xhr();
+jQuery.support.ajax = !!testXHR;
+
+// Does this browser support crossDomain XHR requests
+jQuery.support.cors = testXHR && ( "withCredentials" in testXHR );
+
+// No need for the temporary xhr anymore
+testXHR = undefined;
+
+// Create transport if the browser can provide an xhr
+if ( jQuery.support.ajax ) {
+
+ jQuery.ajaxTransport(function( s ) {
+ // Cross domain only allowed if supported through XMLHttpRequest
+ if ( !s.crossDomain || jQuery.support.cors ) {
+
+ var callback;
+
+ return {
+ send: function( headers, complete ) {
+
+ // Get a new xhr
+ var xhr = s.xhr(),
+ handle,
+ i;
+
+ // Open the socket
+ // Passing null username, generates a login popup on Opera (#2865)
+ if ( s.username ) {
+ xhr.open( s.type, s.url, s.async, s.username, s.password );
+ } else {
+ xhr.open( s.type, s.url, s.async );
+ }
- // active xhrs
- xhrs = {},
-
- // #5280: see below
- xhrUnloadAbortInstalled;
-
-
-jQuery.ajaxTransport( function( s , determineDataType ) {
-
- // Cross domain only allowed if supported through XMLHttpRequest
- if ( ! s.crossDomain || jQuery.support.cors ) {
-
- var callback;
-
- 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;
-
- // Open the socket
- // Passing null username, generates a login popup on Opera (#2865)
- if ( s.username ) {
- xhr.open(s.type, s.url, s.async, s.username, s.password);
- } else {
- 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";
- }
-
- // Need an extra try/catch for cross domain requests in Firefox 3
- try {
-
- jQuery.each(headers, function(key,value) {
- xhr.setRequestHeader(key,value);
- });
-
- } catch(_) {}
-
- // Do send the request
- try {
- xhr.send( ( s.hasContent && s.data ) || null );
- } catch(e) {
- complete(0, "error", "" + e);
- return;
- }
-
- // Listener
- callback = function( _ , isAbort ) {
+ // Apply custom fields if provided
+ if ( s.xhrFields ) {
+ for ( i in s.xhrFields ) {
+ xhr[ i ] = s.xhrFields[ i ];
+ }
+ }
- // Was never called and is aborted or complete
- if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
+ // Override mime type if needed
+ if ( s.mimeType && xhr.overrideMimeType ) {
+ xhr.overrideMimeType( s.mimeType );
+ }
- // Only called once
- callback = 0;
+ // 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";
+ }
- // Do not keep as active anymore
- // and store back into pool
- if (handle) {
- xhr.onreadystatechange = jQuery.noop;
- delete xhrs[ handle ];
+ // Need an extra try/catch for cross domain requests in Firefox 3
+ try {
+ for ( i in headers ) {
+ xhr.setRequestHeader( i, headers[ i ] );
}
+ } catch( _ ) {}
- // If it's an abort
- if ( isAbort ) {
+ // Do send the request
+ // This may raise an exception which is actually
+ // handled in jQuery.ajax (so no try/catch here)
+ xhr.send( ( s.hasContent && s.data ) || null );
- // Abort it manually if needed
- if ( xhr.readyState !== 4 ) {
- xhr.abort();
+ // Listener
+ callback = function( _, isAbort ) {
+
+ var status,
+ statusText,
+ responseHeaders,
+ responses,
+ xml;
+
+ // 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 {
+
+ // Was never called and is aborted or complete
+ if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
+
+ // Only called once
+ callback = undefined;
+
+ // Do not keep as active anymore
+ if ( handle ) {
+ xhr.onreadystatechange = jQuery.noop;
+ delete xhrCallbacks[ handle ];
+ }
+
+ // 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 = "";
+ }
+
+ // 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;
+ }
+ }
}
- } else {
-
- // Get info
- var status = xhr.status,
- statusText,
- response,
- responseHeaders = xhr.getAllResponseHeaders();
-
- try { // Firefox throws an exception when accessing statusText for faulty cross-domain requests
-
- statusText = xhr.statusText;
-
- } catch( e ) {
-
- statusText = ""; // We normalize with Webkit giving an empty statusText
-
+ } catch( firefoxAccessException ) {
+ if ( !isAbort ) {
+ complete( -1, firefoxAccessException );
}
+ }
- // Filter status for non standard behaviours
- // (so many they seem to be the actual "standard")
- status =
- // Opera returns 0 when it should be 304
- // Webkit returns 0 for failing cross-domain no matter the real status
- status === 0 ?
- (
- ! s.crossDomain || statusText ? // Webkit, Firefox: filter out faulty cross-domain requests
- (
- responseHeaders ? // Opera: filter out real aborts #6060
- 304
- :
- 0
- )
- :
- 302 // We assume 302 but could be anything cross-domain related
- )
- :
- (
- status == 1223 ? // IE sometimes returns 1223 when it should be 204 (see #1450)
- 204
- :
- status
- );
-
- // Guess response & update dataType accordingly
- response =
- determineDataType(
- s,
- xhr.getResponseHeader("content-type"),
- xhr.responseText,
- xhr.responseXML );
-
- // Call complete
- complete(status,statusText,response,responseHeaders);
+ // Call complete if needed
+ if ( responses ) {
+ complete( status, statusText, responses, responseHeaders );
+ }
+ };
+
+ // if we're in sync mode or it's in cache
+ // and has been retrieved directly (IE6 & IE7)
+ // we need to manually fire the callback
+ if ( !s.async || xhr.readyState === 4 ) {
+ callback();
+ } else {
+ // 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++;
+ xhr.onreadystatechange = xhrCallbacks[ handle ] = callback;
}
- };
-
- // if we're in sync mode
- // or it's in cache and has been retrieved directly (IE6 & IE7)
- // we need to manually fire the callback
- if ( ! s.async || xhr.readyState === 4 ) {
+ },
- callback();
-
- } else {
-
- // Add to list of active xhrs
- handle = xhrId++;
- xhrs[ handle ] = xhr;
- xhr.onreadystatechange = callback;
- }
- },
-
- abort: function() {
- if ( callback ) {
- callback(0,1);
+ abort: function() {
+ if ( callback ) {
+ callback(0,1);
+ }
}
- }
- };
- }
-});
+ };
+ }
+ });
+}
})( jQuery );
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-28 07:14:20 +0000