xhrs = {},
// #5280: see below
- xhrUnloadAbortInstalled;
+ xhrUnloadAbortInstalled,
+ // XHR used to determine supports properties
+ testXHR;
-jQuery.ajaxTransport( function( s , determineDataType ) {
+// Create the request object; Microsoft failed to properly
+// (This is still attached to ajaxSettings for backward compatibility reasons)
+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() {
+ if ( window.location.protocol !== "file:" ) {
+ try {
+ return new window.XMLHttpRequest();
+ } catch( xhrError ) {}
+ }
- // Cross domain only allowed if supported through XMLHttpRequest
- if ( ! s.crossDomain || jQuery.support.cors ) {
+ try {
+ return new window.ActiveXObject("Microsoft.XMLHTTP");
+ } catch( activeError ) {}
+ } :
+ // For all other browsers, use the standard XMLHttpRequest object
+ function() {
+ return new window.XMLHttpRequest();
+ };
- var callback;
+// Test if we can create an xhr object
+try {
+ testXHR = jQuery.ajaxSettings.xhr();
+} catch( xhrCreationException ) {}
- return {
+//Does this browser support XHR requests?
+jQuery.support.ajax = !!testXHR;
- send: function(headers, complete) {
+// Does this browser support crossDomain XHR requests
+jQuery.support.cors = testXHR && "withCredentials" in testXHR;
- // #5280: we need to abort on unload or IE will keep connections alive
- if ( ! xhrUnloadAbortInstalled ) {
+// No need for the temporary xhr anymore
+testXHR = undefined;
- xhrUnloadAbortInstalled = 1;
+// Create transport if the browser can provide an xhr
+if ( jQuery.support.ajax ) {
+ jQuery.ajaxTransport( function( s , determineDataType ) {
- jQuery(window).bind( "unload" , function() {
+ // Cross domain only allowed if supported through XMLHttpRequest
+ if ( ! s.crossDomain || jQuery.support.cors ) {
- // Abort all pending requests
- jQuery.each(xhrs, function(_, xhr) {
- if ( xhr.onreadystatechange ) {
- xhr.onreadystatechange( 1 );
- }
- });
+ var callback;
- });
- }
+ return {
- // Get a new xhr
- var xhr = s.xhr(),
- handle;
+ send: function(headers, complete) {
- // 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);
- }
+ // #5280: we need to abort on unload or IE will keep connections alive
+ if ( ! xhrUnloadAbortInstalled ) {
- // 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";
- }
+ xhrUnloadAbortInstalled = 1;
+
+ jQuery(window).bind( "unload" , function() {
- // Need an extra try/catch for cross domain requests in Firefox 3
- try {
+ // Abort all pending requests
+ jQuery.each(xhrs, function(_, xhr) {
+ if ( xhr.onreadystatechange ) {
+ xhr.onreadystatechange( 1 );
+ }
+ });
- jQuery.each(headers, function(key,value) {
- xhr.setRequestHeader(key,value);
- });
+ });
+ }
- } catch(_) {}
+ // Get a new xhr
+ var xhr = s.xhr(),
+ handle;
- // Do send the request
- try {
- xhr.send( ( s.hasContent && s.data ) || null );
- } catch(e) {
- complete(0, "error", "" + e);
- return;
- }
+ // 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);
+ }
- // Listener
- callback = function( _ , isAbort ) {
+ // 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";
+ }
- // Was never called and is aborted or complete
- if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
+ // Need an extra try/catch for cross domain requests in Firefox 3
+ try {
- // Only called once
- callback = 0;
+ jQuery.each(headers, function(key,value) {
+ xhr.setRequestHeader(key,value);
+ });
- // Do not keep as active anymore
- // and store back into pool
- if (handle) {
- xhr.onreadystatechange = jQuery.noop;
- delete xhrs[ handle ];
- }
+ } catch(_) {}
- // If it's an abort
- if ( isAbort ) {
+ // Do send the request
+ try {
+ xhr.send( ( s.hasContent && s.data ) || null );
+ } catch(e) {
+ complete(0, "error", "" + e);
+ return;
+ }
- // Abort it manually if needed
- if ( xhr.readyState !== 4 ) {
- xhr.abort();
+ // Listener
+ callback = function( _ , isAbort ) {
+
+ // Was never called and is aborted or complete
+ if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
+
+ // Only called once
+ callback = 0;
+
+ // Do not keep as active anymore
+ // and store back into pool
+ if (handle) {
+ xhr.onreadystatechange = jQuery.noop;
+ delete xhrs[ handle ];
}
- } else {
- // Get info
- var status = xhr.status,
- statusText,
- response,
- responseHeaders = xhr.getAllResponseHeaders();
+ // If it's an abort
+ if ( isAbort ) {
- try { // Firefox throws an exception when accessing statusText for faulty cross-domain requests
+ // Abort it manually if needed
+ if ( xhr.readyState !== 4 ) {
+ xhr.abort();
+ }
+ } else {
- statusText = xhr.statusText;
+ // Get info
+ var status = xhr.status,
+ statusText,
+ response,
+ responseHeaders = xhr.getAllResponseHeaders();
- } catch( e ) {
+ try { // Firefox throws an exception when accessing statusText for faulty cross-domain requests
- statusText = ""; // We normalize with Webkit giving an empty statusText
+ statusText = xhr.statusText;
- }
+ } catch( e ) {
- // 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
+ statusText = ""; // We normalize with Webkit giving an empty statusText
+
+ }
+
+ // 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 ?
(
- responseHeaders ? // Opera: filter out real aborts #6060
- 304
+ ! s.crossDomain || statusText ? // Webkit, Firefox: filter out faulty cross-domain requests
+ (
+ responseHeaders ? // Opera: filter out real aborts #6060
+ 304
+ :
+ 0
+ )
:
- 0
+ 302 // We assume 302 but could be anything cross-domain related
)
:
- 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);
+ (
+ 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);
+ }
}
- }
- };
+ };
- // 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 ) {
+ // 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();
+ callback();
- } else {
+ } else {
- // Add to list of active xhrs
- handle = xhrId++;
- xhrs[ handle ] = xhr;
- xhr.onreadystatechange = callback;
- }
- },
+ // 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 );
projects / jquery.git / commitdiff