(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,
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 );
+ }
+
// Apply custom fields if provided
if ( s.xhrFields ) {
for ( i in s.xhrFields ) {
}
}
- // 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 );
+ // Override mime type if needed
+ if ( s.mimeType && xhr.overrideMimeType ) {
+ xhr.overrideMimeType( s.mimeType );
}
// Requested-With header
// 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
// Do not keep as active anymore
if ( handle ) {
xhr.onreadystatechange = jQuery.noop;
- delete xhrs[ handle ];
+ delete xhrCallbacks[ handle ];
}
// If it's an abort
xhr.abort();
}
} else {
- // Get info
status = xhr.status;
responseHeaders = xhr.getAllResponseHeaders();
responses = {};
// Filter status for non standard behaviors
status =
- // Most browsers return 0 when it should be 200 for local files
- // Opera returns 0 when it should be 304
- // Webkit returns 0 for failing cross-domain no matter the real status
- !status ?
- // All: for local files, 0 is a success
- ( location.protocol === "file:" ? 200 : (
- // 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
- );
+ // 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)
+ !status && s.isLocal ?
+ ( responses.text ? 200 : 404 ) :
+ // IE - #1450: sometimes returns 1223 when it should be 204
+ ( status === 1223 ? 204 : status );
}
}
} catch( firefoxAccessException ) {
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;
}
},
git.asbjorn.biz / jquery.git / blobdiff