--- /dev/null
+(function( jQuery ) {
+
+var // Next fake timer id
+ xhrPollingId = jQuery.now(),
+
+ // Callbacks hashtable
+ xhrs = {},
+
+ // #5280: see end of file
+ xhrUnloadAbortMarker = [];
+
+
+jQuery.xhr.bindTransport( function( s , determineDataType ) {
+
+ // Cross domain only allowed if supported through XMLHttpRequest
+ if ( ! s.crossDomain || jQuery.support.cors ) {
+
+ var callback;
+
+ return {
+
+ send: function(headers, complete) {
+
+ 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 in beforeSend
+ 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 ( abortStatusText ) {
+
+ // Was never called and is aborted or complete
+ if ( callback && ( abortStatusText || xhr.readyState === 4 ) ) {
+
+ // Do not listen anymore
+ if (handle) {
+ xhr.onreadystatechange = jQuery.noop;
+ delete xhrs[ handle ];
+ handle = undefined;
+ }
+
+ callback = 0;
+
+ // Get info
+ var status, statusText, response, responseHeaders;
+
+ if ( abortStatusText ) {
+
+ if ( xhr.readyState !== 4 ) {
+ xhr.abort();
+ }
+
+ // Stop here if unloadAbort
+ if ( abortStatusText === xhrUnloadAbortMarker ) {
+ return;
+ }
+
+ status = 0;
+ statusText = abortStatusText;
+
+ } else {
+
+ status = xhr.status;
+
+ 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
+
+ }
+
+ responseHeaders = xhr.getAllResponseHeaders();
+
+ // 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 if needed & update datatype accordingly
+ if ( status >= 200 && status < 300 ) {
+ response =
+ determineDataType(
+ s,
+ xhr.getResponseHeader("content-type"),
+ xhr.responseText,
+ xhr.responseXML );
+ }
+ }
+
+ // Call complete
+ complete(status,statusText,response,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 {
+
+ // Listener is externalized to handle abort on unload
+ handle = xhrPollingId++;
+ xhrs[ handle ] = xhr;
+ xhr.onreadystatechange = function() {
+ callback();
+ };
+ }
+ },
+
+ abort: function(statusText) {
+ if ( callback ) {
+ callback(statusText);
+ }
+ }
+ };
+ }
+});
+
+// #5280: we need to abort on unload or IE will keep connections alive
+jQuery(window).bind( "unload" , function() {
+
+ // Abort all pending requests
+ jQuery.each(xhrs, function(_, xhr) {
+ if ( xhr.onreadystatechange ) {
+ xhr.onreadystatechange( xhrUnloadAbortMarker );
+ }
+ });
+
+ // Resest polling structure to be safe
+ xhrs = {};
+
+});
+
+})(jQuery);
git.asbjorn.biz / jquery.git / blobdiff