X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fajax%2Fxhr.js;h=47cfc6c3724349ced9102561db9283225fb5da82;hb=cb85da7b62e74e7339ed652ade209aaffbd0c15b;hp=614bd3a0c80ee57f69ab8183bb693f074d0a2f41;hpb=57956152d8a9d23ae97ba576b8ec4b63306c8758;p=jquery.git diff --git a/src/ajax/xhr.js b/src/ajax/xhr.js index 614bd3a..47cfc6c 100644 --- a/src/ajax/xhr.js +++ b/src/ajax/xhr.js @@ -7,177 +7,208 @@ var // Next active xhr id xhrs = {}, // #5280: see below - xhrUnloadAbortInstalled; - - -jQuery.ajax.transport( 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); - } + xhrUnloadAbortInstalled, + + // XHR used to determine supports properties + testXHR; + +// 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() { + if ( window.location.protocol !== "file:" ) { + try { + return new window.XMLHttpRequest(); + } catch( xhrError ) {} + } + + try { + return new window.ActiveXObject("Microsoft.XMLHTTP"); + } catch( activeError ) {} + } : + // For all other browsers, use the standard XMLHttpRequest object + function() { + return new window.XMLHttpRequest(); + }; + +// Test if we can create an xhr object +try { + testXHR = jQuery.ajaxSettings.xhr(); +} catch( xhrCreationException ) {} + +//Does this browser support XHR requests? +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 ) { + + // #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 ); + } + } ); + + } ); + } - // 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"; - } + // Get a new xhr + var xhr = s.xhr(), + handle; - // Need an extra try/catch for cross domain requests in Firefox 3 - try { + // 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 ); + } - jQuery.each(headers, function(key,value) { - xhr.setRequestHeader(key,value); - }); + // 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"; + } - } catch(_) {} + // 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 { + // 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 ); - } catch(e) { - complete(0, "error", "" + e); - return; - } - - // Listener - callback = function( _ , isAbort ) { - // Was never called and is aborted or complete - if ( callback && ( isAbort || xhr.readyState === 4 ) ) { + // Listener + callback = function( _, isAbort ) { - // 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 ]; - } + // Was never called and is aborted or complete + if ( callback && ( isAbort || xhr.readyState === 4 ) ) { - // If it's an abort - if ( isAbort ) { + // Only called once + callback = 0; - // Abort it manually if needed - if ( xhr.readyState !== 4 ) { - xhr.abort(); + // Do not keep as active anymore + if ( handle ) { + xhr.onreadystatechange = jQuery.noop; + delete xhrs[ handle ]; } - } 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 - } - - // 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 + // If it's an abort + if ( isAbort ) { + // Abort it manually if needed + if ( xhr.readyState !== 4 ) { + xhr.abort(); + } + } else { + // Get info + var status = xhr.status, + statusText, + 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 + 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 + ) ) : ( - 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); + // IE sometimes returns 1223 when it should be 204 (see #1450) + status == 1223 ? + 204 : + status + ); + + // Call complete + 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 { + // Add to list of active xhrs + handle = xhrId++; + xhrs[ handle ] = xhr; + xhr.onreadystatechange = 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 );