Disables dataType redirection while selecting transport.
[jquery.git] / src / ajax.js
index 90dc350..f33bd49 100644 (file)
 (function( jQuery ) {
 
-var jsc = jQuery.now(),
-       rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
-       rselectTextarea = /^(?:select|textarea)/i,
+var r20 = /%20/g,
+       rbracket = /\[\]$/,
+       rCRLF = /\r?\n/g,
+       rhash = /#.*$/,
+       rheaders = /^(.*?):\s*(.*?)\r?$/mg, // IE leaves an \r character at EOL
        rinput = /^(?:color|date|datetime|email|hidden|month|number|password|range|search|tel|text|time|url|week)$/i,
+       // #7653, #8125, #8152: local protocol detection
+       rlocalProtocol = /(?:^file|^widget|\-extension):$/,
        rnoContent = /^(?:GET|HEAD)$/,
-       rbracket = /\[\]$/,
-       jsre = /\=\?(&|$)/,
+       rprotocol = /^\/\//,
        rquery = /\?/,
+       rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
+       rselectTextarea = /^(?:select|textarea)/i,
+       rspacesAjax = /\s+/,
        rts = /([?&])_=[^&]*/,
-       rurl = /^(\w+:)?\/\/([^\/?#]+)/,
-       r20 = /%20/g,
-       rhash = /#.*$/,
+       rurl = /^([\w\+\.\-]+:)\/\/([^\/?#:]*)(?::(\d+))?/,
 
        // Keep a copy of the old load method
-       _load = jQuery.fn.load;
+       _load = jQuery.fn.load,
+
+       /* Prefilters
+        * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
+        * 2) These are called:
+        *    - BEFORE asking for a transport
+        *    - AFTER param serialization (s.data is a string if s.processData is true)
+        * 3) key is the dataType
+        * 4) the catchall symbol "*" can be used
+        * 5) execution will start with transport dataType and THEN continue down to "*" if needed
+        */
+       prefilters = {},
+
+       /* Transports bindings
+        * 1) key is the dataType
+        * 2) the catchall symbol "*" can be used
+        * 3) selection will start with transport dataType and THEN go to "*" if needed
+        */
+       transports = {},
+
+       // Document location
+       ajaxLocation,
+
+       // Document location segments
+       ajaxLocParts;
+
+// #8138, IE may throw an exception when accessing
+// a field from document.location if document.domain has been set
+try {
+       ajaxLocation = document.location.href;
+} catch( e ) {
+       // Use the href attribute of an A element
+       // since IE will modify it given document.location
+       ajaxLocation = document.createElement( "a" );
+       ajaxLocation.href = "";
+       ajaxLocation = ajaxLocation.href;
+}
+
+// Segment location into parts
+ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() );
+
+// Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
+function addToPrefiltersOrTransports( structure ) {
+
+       // dataTypeExpression is optional and defaults to "*"
+       return function( dataTypeExpression, func ) {
+
+               if ( typeof dataTypeExpression !== "string" ) {
+                       func = dataTypeExpression;
+                       dataTypeExpression = "*";
+               }
+
+               if ( jQuery.isFunction( func ) ) {
+                       var dataTypes = dataTypeExpression.toLowerCase().split( rspacesAjax ),
+                               i = 0,
+                               length = dataTypes.length,
+                               dataType,
+                               list,
+                               placeBefore;
+
+                       // For each dataType in the dataTypeExpression
+                       for(; i < length; i++ ) {
+                               dataType = dataTypes[ i ];
+                               // We control if we're asked to add before
+                               // any existing element
+                               placeBefore = /^\+/.test( dataType );
+                               if ( placeBefore ) {
+                                       dataType = dataType.substr( 1 ) || "*";
+                               }
+                               list = structure[ dataType ] = structure[ dataType ] || [];
+                               // then we add to the structure accordingly
+                               list[ placeBefore ? "unshift" : "push" ]( func );
+                       }
+               }
+       };
+}
+
+//Base inspection function for prefilters and transports
+function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR,
+               dataType /* internal */, inspected /* internal */ ) {
+
+       dataType = dataType || options.dataTypes[ 0 ];
+       inspected = inspected || {};
+
+       inspected[ dataType ] = true;
+
+       var list = structure[ dataType ],
+               i = 0,
+               length = list ? list.length : 0,
+               executeOnly = ( structure === prefilters ),
+               selection;
+
+       for(; i < length && ( executeOnly || !selection ); i++ ) {
+               selection = list[ i ]( options, originalOptions, jqXHR );
+               // If we got redirected to another dataType
+               // we try there if executing only and not done already
+               if ( typeof selection === "string" ) {
+                       if ( !executeOnly || inspected[ selection ] ) {
+                               selection = undefined;
+                       } else {
+                               options.dataTypes.unshift( selection );
+                               selection = inspectPrefiltersOrTransports(
+                                               structure, options, originalOptions, jqXHR, selection, inspected );
+                       }
+               }
+       }
+       // If we're only executing or nothing was selected
+       // we try the catchall dataType if not done already
+       if ( ( executeOnly || !selection ) && !inspected[ "*" ] ) {
+               selection = inspectPrefiltersOrTransports(
+                               structure, options, originalOptions, jqXHR, "*", inspected );
+       }
+       // unnecessary when only executing (prefilters)
+       // but it'll be ignored by the caller in that case
+       return selection;
+}
 
 jQuery.fn.extend({
        load: function( url, params, callback ) {
@@ -26,10 +145,10 @@ jQuery.fn.extend({
                        return this;
                }
 
-               var off = url.indexOf(" ");
+               var off = url.indexOf( " " );
                if ( off >= 0 ) {
-                       var selector = url.slice(off, url.length);
-                       url = url.slice(0, off);
+                       var selector = url.slice( off, url.length );
+                       url = url.slice( 0, off );
                }
 
                // Default to a GET request
@@ -58,26 +177,34 @@ jQuery.fn.extend({
                        type: type,
                        dataType: "html",
                        data: params,
-                       complete: function( res, status ) {
+                       // Complete callback (responseText is used internally)
+                       complete: function( jqXHR, status, responseText ) {
+                               // Store the response as specified by the jqXHR object
+                               responseText = jqXHR.responseText;
                                // If successful, inject the HTML into all the matched elements
-                               if ( status === "success" || status === "notmodified" ) {
+                               if ( jqXHR.isResolved() ) {
+                                       // #4825: Get the actual response in case
+                                       // a dataFilter is present in ajaxSettings
+                                       jqXHR.done(function( r ) {
+                                               responseText = r;
+                                       });
                                        // See if a selector was specified
                                        self.html( selector ?
                                                // Create a dummy div to hold the results
                                                jQuery("<div>")
                                                        // inject the contents of the document in, removing the scripts
                                                        // to avoid any 'Permission Denied' errors in IE
-                                                       .append(res.responseText.replace(rscript, ""))
+                                                       .append(responseText.replace(rscript, ""))
 
                                                        // Locate the specified elements
                                                        .find(selector) :
 
                                                // If not, just inject the full result
-                                               res.responseText );
+                                               responseText );
                                }
 
                                if ( callback ) {
-                                       self.each( callback, [res.responseText, status, res] );
+                                       self.each( callback, [ responseText, status, jqXHR ] );
                                }
                        }
                });
@@ -86,42 +213,42 @@ jQuery.fn.extend({
        },
 
        serialize: function() {
-               return jQuery.param(this.serializeArray());
+               return jQuery.param( this.serializeArray() );
        },
 
        serializeArray: function() {
-               return this.map(function() {
-                       return this.elements ? jQuery.makeArray(this.elements) : this;
+               return this.map(function(){
+                       return this.elements ? jQuery.makeArray( this.elements ) : this;
                })
-               .filter(function() {
+               .filter(function(){
                        return this.name && !this.disabled &&
-                               (this.checked || rselectTextarea.test(this.nodeName) ||
-                                       rinput.test(this.type));
+                               ( this.checked || rselectTextarea.test( this.nodeName ) ||
+                                       rinput.test( this.type ) );
                })
-               .map(function( i, elem ) {
-                       var val = jQuery(this).val();
+               .map(function( i, elem ){
+                       var val = jQuery( this ).val();
 
                        return val == null ?
                                null :
-                               jQuery.isArray(val) ?
-                                       jQuery.map( val, function( val, i ) {
-                                               return { name: elem.name, value: val };
+                               jQuery.isArray( val ) ?
+                                       jQuery.map( val, function( val, i ){
+                                               return { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
                                        }) :
-                                       { name: elem.name, value: val };
+                                       { name: elem.name, value: val.replace( rCRLF, "\r\n" ) };
                }).get();
        }
 });
 
 // Attach a bunch of functions for handling common AJAX events
-jQuery.each( "ajaxStart ajaxStop ajaxComplete ajaxError ajaxSuccess ajaxSend".split(" "), function( i, o ) {
-       jQuery.fn[o] = function( f ) {
-               return this.bind(o, f);
+jQuery.each( "ajaxStart ajaxStop ajaxComplete ajaxError ajaxSuccess ajaxSend".split( " " ), function( i, o ){
+       jQuery.fn[ o ] = function( f ){
+               return this.bind( o, f );
        };
-});
+} );
 
-jQuery.extend({
-       get: function( url, data, callback, type ) {
-               // shift arguments if data argument was omited
+jQuery.each( [ "get", "post" ], function( i, method ) {
+       jQuery[ method ] = function( url, data, callback, type ) {
+               // shift arguments if data argument was omitted
                if ( jQuery.isFunction( data ) ) {
                        type = type || callback;
                        callback = data;
@@ -129,45 +256,35 @@ jQuery.extend({
                }
 
                return jQuery.ajax({
-                       type: "GET",
+                       type: method,
                        url: url,
                        data: data,
                        success: callback,
                        dataType: type
                });
-       },
+       };
+} );
+
+jQuery.extend({
 
        getScript: function( url, callback ) {
-               return jQuery.get(url, null, callback, "script");
+               return jQuery.get( url, null, callback, "script" );
        },
 
        getJSON: function( url, data, callback ) {
-               return jQuery.get(url, data, callback, "json");
-       },
-
-       post: function( url, data, callback, type ) {
-               // shift arguments if data argument was omited
-               if ( jQuery.isFunction( data ) ) {
-                       type = type || callback;
-                       callback = data;
-                       data = {};
-               }
-
-               return jQuery.ajax({
-                       type: "POST",
-                       url: url,
-                       data: data,
-                       success: callback,
-                       dataType: type
-               });
+               return jQuery.get( url, data, callback, "json" );
        },
 
        ajaxSetup: function( settings ) {
-               jQuery.extend( jQuery.ajaxSettings, settings );
+               jQuery.extend( true, jQuery.ajaxSettings, settings );
+               if ( settings.context ) {
+                       jQuery.ajaxSettings.context = settings.context;
+               }
        },
 
        ajaxSettings: {
-               url: location.href,
+               url: ajaxLocation,
+               isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
                global: true,
                type: "GET",
                contentType: "application/x-www-form-urlencoded",
@@ -176,342 +293,415 @@ jQuery.extend({
                /*
                timeout: 0,
                data: null,
+               dataType: null,
                username: null,
                password: null,
+               cache: null,
                traditional: false,
+               headers: {},
+               crossDomain: null,
                */
-               // This function can be overriden by calling jQuery.ajaxSetup
-               xhr: function() {
-                       return new window.XMLHttpRequest();
-               },
+
                accepts: {
                        xml: "application/xml, text/xml",
                        html: "text/html",
-                       script: "text/javascript, application/javascript",
-                       json: "application/json, text/javascript",
                        text: "text/plain",
-                       _default: "*/*"
-               }
-       },
+                       json: "application/json, text/javascript",
+                       "*": "*/*"
+               },
 
-       ajax: function( origSettings ) {
-               // IE8 leaks a lot when we've set abort, and IE6-8 a little
-               // when we have set onreadystatechange. Bug #6242
-               // XXX IE7 still leaks when abort is called, no matter what
-               // we do
-               function cleanup() {
-                       // IE6 will throw an error setting xhr.abort
-                       try {
-                               xhr.abort = xhr.onreadystatechange = jQuery.noop;
-                       } catch(e) {}
-               }
+               contents: {
+                       xml: /xml/,
+                       html: /html/,
+                       json: /json/
+               },
 
-               var s = jQuery.extend(true, {}, jQuery.ajaxSettings, origSettings),
-                       jsonp, status, data, type = s.type.toUpperCase(), noContent = rnoContent.test(type);
+               responseFields: {
+                       xml: "responseXML",
+                       text: "responseText"
+               },
 
-               // toString fixes people passing a window.location or
-               // document.location to $.ajax, which worked in 1.4.2 and
-               // earlier (bug #7531). It should be removed in 1.5.
-               s.url = ("" + s.url).replace( rhash, "" );
+               // List of data converters
+               // 1) key format is "source_type destination_type" (a single space in-between)
+               // 2) the catchall symbol "*" can be used for source_type
+               converters: {
 
-               // Use original (not extended) context object if it was provided
-               s.context = origSettings && origSettings.context != null ? origSettings.context : s;
+                       // Convert anything to text
+                       "* text": window.String,
 
-               // convert data if not already a string
-               if ( s.data && s.processData && typeof s.data !== "string" ) {
-                       s.data = jQuery.param( s.data, s.traditional );
+                       // Text to html (true = no transformation)
+                       "text html": true,
+
+                       // Evaluate text as a json expression
+                       "text json": jQuery.parseJSON,
+
+                       // Parse text as xml
+                       "text xml": jQuery.parseXML
                }
+       },
 
-               // Handle JSONP Parameter Callbacks
-               if ( s.dataType === "jsonp" ) {
-                       if ( type === "GET" ) {
-                               if ( !jsre.test( s.url ) ) {
-                                       s.url += (rquery.test( s.url ) ? "&" : "?") + (s.jsonp || "callback") + "=?";
+       ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
+       ajaxTransport: addToPrefiltersOrTransports( transports ),
+
+       // Main method
+       ajax: function( url, options ) {
+
+               // If url is an object, simulate pre-1.5 signature
+               if ( typeof url === "object" ) {
+                       options = url;
+                       url = undefined;
+               }
+
+               // Force options to be an object
+               options = options || {};
+
+               var // Create the final options object
+                       s = jQuery.extend( true, {}, jQuery.ajaxSettings, options ),
+                       // Callbacks context
+                       // We force the original context if it exists
+                       // or take it from jQuery.ajaxSettings otherwise
+                       // (plain objects used as context get extended)
+                       callbackContext =
+                               ( s.context = ( "context" in options ? options : jQuery.ajaxSettings ).context ) || s,
+                       // Context for global events
+                       // It's the callbackContext if one was provided in the options
+                       // and if it's a DOM node
+                       globalEventContext = callbackContext !== s && callbackContext.nodeType ?
+                               jQuery( callbackContext ) : jQuery.event,
+                       // Deferreds
+                       deferred = jQuery.Deferred(),
+                       completeDeferred = jQuery._Deferred(),
+                       // Status-dependent callbacks
+                       statusCode = s.statusCode || {},
+                       // ifModified key
+                       ifModifiedKey,
+                       // Headers (they are sent all at once)
+                       requestHeaders = {},
+                       // Response headers
+                       responseHeadersString,
+                       responseHeaders,
+                       // transport
+                       transport,
+                       // timeout handle
+                       timeoutTimer,
+                       // Cross-domain detection vars
+                       parts,
+                       // The jqXHR state
+                       state = 0,
+                       // Loop variable
+                       i,
+                       // Fake xhr
+                       jqXHR = {
+
+                               readyState: 0,
+
+                               // Caches the header
+                               setRequestHeader: function( name, value ) {
+                                       if ( state === 0 ) {
+                                               requestHeaders[ name.toLowerCase() ] = value;
+                                       }
+                                       return this;
+                               },
+
+                               // Raw string
+                               getAllResponseHeaders: function() {
+                                       return state === 2 ? responseHeadersString : null;
+                               },
+
+                               // Builds headers hashtable if needed
+                               getResponseHeader: function( key ) {
+                                       var match;
+                                       if ( state === 2 ) {
+                                               if ( !responseHeaders ) {
+                                                       responseHeaders = {};
+                                                       while( ( match = rheaders.exec( responseHeadersString ) ) ) {
+                                                               responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
+                                                       }
+                                               }
+                                               match = responseHeaders[ key.toLowerCase() ];
+                                       }
+                                       return match || null;
+                               },
+
+                               // Cancel the request
+                               abort: function( statusText ) {
+                                       statusText = statusText || "abort";
+                                       if ( transport ) {
+                                               transport.abort( statusText );
+                                       }
+                                       done( 0, statusText );
+                                       return this;
                                }
-                       } else if ( !s.data || !jsre.test(s.data) ) {
-                               s.data = (s.data ? s.data + "&" : "") + (s.jsonp || "callback") + "=?";
+                       };
+
+               // Callback for when everything is done
+               // It is defined here because jslint complains if it is declared
+               // at the end of the function (which would be more logical and readable)
+               function done( status, statusText, responses, headers) {
+
+                       // Called once
+                       if ( state === 2 ) {
+                               return;
                        }
-                       s.dataType = "json";
-               }
 
-               // Build temporary JSONP function
-               if ( s.dataType === "json" && (s.data && jsre.test(s.data) || jsre.test(s.url)) ) {
-                       jsonp = s.jsonpCallback || ("jsonp" + jsc++);
+                       // State is "done" now
+                       state = 2;
 
-                       // Replace the =? sequence both in the query string and the data
-                       if ( s.data ) {
-                               s.data = (s.data + "").replace(jsre, "=" + jsonp + "$1");
+                       // Clear timeout if it exists
+                       if ( timeoutTimer ) {
+                               clearTimeout( timeoutTimer );
                        }
 
-                       s.url = s.url.replace(jsre, "=" + jsonp + "$1");
+                       // Dereference transport for early garbage collection
+                       // (no matter how long the jqXHR object will be used)
+                       transport = undefined;
+
+                       // Cache response headers
+                       responseHeadersString = headers || "";
+
+                       // Set readyState
+                       jqXHR.readyState = status ? 4 : 0;
+
+                       var isSuccess,
+                               success,
+                               error,
+                               response = responses ? ajaxHandleResponses( s, jqXHR, responses ) : undefined,
+                               lastModified,
+                               etag;
 
-                       // We need to make sure
-                       // that a JSONP style response is executed properly
-                       s.dataType = "script";
+                       // If successful, handle type chaining
+                       if ( status >= 200 && status < 300 || status === 304 ) {
 
-                       // Handle JSONP-style loading
-                       var customJsonp = window[ jsonp ];
+                               // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+                               if ( s.ifModified ) {
 
-                       window[ jsonp ] = function( tmp ) {
-                               if ( jQuery.isFunction( customJsonp ) ) {
-                                       customJsonp( tmp );
+                                       if ( ( lastModified = jqXHR.getResponseHeader( "Last-Modified" ) ) ) {
+                                               jQuery.lastModified[ ifModifiedKey ] = lastModified;
+                                       }
+                                       if ( ( etag = jqXHR.getResponseHeader( "Etag" ) ) ) {
+                                               jQuery.etag[ ifModifiedKey ] = etag;
+                                       }
+                               }
+
+                               // If not modified
+                               if ( status === 304 ) {
 
+                                       statusText = "notmodified";
+                                       isSuccess = true;
+
+                               // If we have data
                                } else {
-                                       // Garbage collect
-                                       window[ jsonp ] = undefined;
 
                                        try {
-                                               delete window[ jsonp ];
-                                       } catch( jsonpError ) {}
+                                               success = ajaxConvert( s, response );
+                                               statusText = "success";
+                                               isSuccess = true;
+                                       } catch(e) {
+                                               // We have a parsererror
+                                               statusText = "parsererror";
+                                               error = e;
+                                       }
                                }
-
-                               data = tmp;
-                               jQuery.handleSuccess( s, xhr, status, data );
-                               jQuery.handleComplete( s, xhr, status, data );
-                               
-                               if ( head ) {
-                                       head.removeChild( script );
+                       } else {
+                               // We extract error from statusText
+                               // then normalize statusText and status for non-aborts
+                               error = statusText;
+                               if( status ) {
+                                       statusText = "error";
+                                       if ( status < 0 ) {
+                                               status = 0;
+                                       }
                                }
-                       };
-               }
+                       }
 
-               if ( s.dataType === "script" && s.cache === undefined ) {
-                       s.cache = false;
-               }
+                       // Set data for the fake xhr object
+                       jqXHR.status = status;
+                       jqXHR.statusText = statusText;
 
-               if ( s.cache === false && noContent ) {
-                       var ts = jQuery.now();
+                       // Success/Error
+                       if ( isSuccess ) {
+                               deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
+                       } else {
+                               deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
+                       }
 
-                       // try replacing _= if it is there
-                       var ret = s.url.replace(rts, "$1_=" + ts);
+                       // Status-dependent callbacks
+                       jqXHR.statusCode( statusCode );
+                       statusCode = undefined;
 
-                       // if nothing was replaced, add timestamp to the end
-                       s.url = ret + ((ret === s.url) ? (rquery.test(s.url) ? "&" : "?") + "_=" + ts : "");
-               }
+                       if ( s.global ) {
+                               globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ),
+                                               [ jqXHR, s, isSuccess ? success : error ] );
+                       }
 
-               // If data is available, append data to url for GET/HEAD requests
-               if ( s.data && noContent ) {
-                       s.url += (rquery.test(s.url) ? "&" : "?") + s.data;
-               }
+                       // Complete
+                       completeDeferred.resolveWith( callbackContext, [ jqXHR, statusText ] );
 
-               // Watch for a new set of requests
-               if ( s.global && jQuery.active++ === 0 ) {
-                       jQuery.event.trigger( "ajaxStart" );
+                       if ( s.global ) {
+                               globalEventContext.trigger( "ajaxComplete", [ jqXHR, s] );
+                               // Handle the global AJAX counter
+                               if ( !( --jQuery.active ) ) {
+                                       jQuery.event.trigger( "ajaxStop" );
+                               }
+                       }
                }
 
-               // Matches an absolute URL, and saves the domain
-               var parts = rurl.exec( s.url ),
-                       remote = parts && (parts[1] && parts[1].toLowerCase() !== location.protocol || parts[2].toLowerCase() !== location.host);
-
-               // If we're requesting a remote document
-               // and trying to load JSON or Script with a GET
-               if ( s.dataType === "script" && type === "GET" && remote ) {
-                       var head = document.getElementsByTagName("head")[0] || document.documentElement;
-                       var script = document.createElement("script");
-                       if ( s.scriptCharset ) {
-                               script.charset = s.scriptCharset;
-                       }
-                       script.src = s.url;
-
-                       // Handle Script loading
-                       if ( !jsonp ) {
-                               var done = false;
-
-                               // Attach handlers for all browsers
-                               script.onload = script.onreadystatechange = function() {
-                                       if ( !done && (!this.readyState ||
-                                                       this.readyState === "loaded" || this.readyState === "complete") ) {
-                                               done = true;
-                                               jQuery.handleSuccess( s, xhr, status, data );
-                                               jQuery.handleComplete( s, xhr, status, data );
-
-                                               // Handle memory leak in IE
-                                               script.onload = script.onreadystatechange = null;
-                                               if ( head && script.parentNode ) {
-                                                       head.removeChild( script );
-                                               }
+               // Attach deferreds
+               deferred.promise( jqXHR );
+               jqXHR.success = jqXHR.done;
+               jqXHR.error = jqXHR.fail;
+               jqXHR.complete = completeDeferred.done;
+
+               // Status-dependent callbacks
+               jqXHR.statusCode = function( map ) {
+                       if ( map ) {
+                               var tmp;
+                               if ( state < 2 ) {
+                                       for( tmp in map ) {
+                                               statusCode[ tmp ] = [ statusCode[tmp], map[tmp] ];
                                        }
-                               };
+                               } else {
+                                       tmp = map[ jqXHR.status ];
+                                       jqXHR.then( tmp, tmp );
+                               }
                        }
+                       return this;
+               };
 
-                       // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
-                       // This arises when a base node is used (#2709 and #4378).
-                       head.insertBefore( script, head.firstChild );
+               // Remove hash character (#7531: and string promotion)
+               // Add protocol if not provided (#5866: IE7 issue with protocol-less urls)
+               // We also use the url parameter if available
+               s.url = ( "" + ( url || s.url ) ).replace( rhash, "" ).replace( rprotocol, ajaxLocParts[ 1 ] + "//" );
 
-                       // We handle everything using the script element injection
-                       return undefined;
+               // Extract dataTypes list
+               s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( rspacesAjax );
+
+               // Determine if a cross-domain request is in order
+               if ( !s.crossDomain ) {
+                       parts = rurl.exec( s.url.toLowerCase() );
+                       s.crossDomain = !!( parts &&
+                               ( parts[ 1 ] != ajaxLocParts[ 1 ] || parts[ 2 ] != ajaxLocParts[ 2 ] ||
+                                       ( parts[ 3 ] || ( parts[ 1 ] === "http:" ? 80 : 443 ) ) !=
+                                               ( ajaxLocParts[ 3 ] || ( ajaxLocParts[ 1 ] === "http:" ? 80 : 443 ) ) )
+                       );
                }
 
-               var requestDone = false;
+               // Convert data if not already a string
+               if ( s.data && s.processData && typeof s.data !== "string" ) {
+                       s.data = jQuery.param( s.data, s.traditional );
+               }
 
-               // Create the request object
-               var xhr = s.xhr();
+               // Apply prefilters
+               inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
 
-               if ( !xhr ) {
-                       return;
-               }
+               // Uppercase the type
+               s.type = s.type.toUpperCase();
 
-               // Open the socket
-               // Passing null username, generates a login popup on Opera (#2865)
-               if ( s.username ) {
-                       xhr.open(type, s.url, s.async, s.username, s.password);
-               } else {
-                       xhr.open(type, s.url, s.async);
-               }
+               // Determine if request has content
+               s.hasContent = !rnoContent.test( s.type );
 
-               // Need an extra try/catch for cross domain requests in Firefox 3
-               try {
-                       // Set content-type if data specified and content-body is valid for this type
-                       if ( (s.data != null && !noContent) || (origSettings && origSettings.contentType) ) {
-                               xhr.setRequestHeader("Content-Type", s.contentType);
-                       }
+               // Watch for a new set of requests
+               if ( s.global && jQuery.active++ === 0 ) {
+                       jQuery.event.trigger( "ajaxStart" );
+               }
 
-                       // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
-                       if ( s.ifModified ) {
-                               if ( jQuery.lastModified[s.url] ) {
-                                       xhr.setRequestHeader("If-Modified-Since", jQuery.lastModified[s.url]);
-                               }
+               // More options handling for requests with no content
+               if ( !s.hasContent ) {
 
-                               if ( jQuery.etag[s.url] ) {
-                                       xhr.setRequestHeader("If-None-Match", jQuery.etag[s.url]);
-                               }
+                       // If data is available, append data to url
+                       if ( s.data ) {
+                               s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.data;
                        }
 
-                       // Set header so the called script knows that it's an XMLHttpRequest
-                       // Only send the header if it's not a remote XHR
-                       if ( !remote ) {
-                               xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
-                       }
+                       // Get ifModifiedKey before adding the anti-cache parameter
+                       ifModifiedKey = s.url;
 
-                       // Set the Accepts header for the server, depending on the dataType
-                       xhr.setRequestHeader("Accept", s.dataType && s.accepts[ s.dataType ] ?
-                               s.accepts[ s.dataType ] + ", */*; q=0.01" :
-                               s.accepts._default );
-               } catch( headerError ) {}
+                       // Add anti-cache in url if needed
+                       if ( s.cache === false ) {
 
-               // Allow custom headers/mimetypes and early abort
-               if ( s.beforeSend && s.beforeSend.call(s.context, xhr, s) === false ) {
-                       // Handle the global AJAX counter
-                       if ( s.global && jQuery.active-- === 1 ) {
-                               jQuery.event.trigger( "ajaxStop" );
+                               var ts = jQuery.now(),
+                                       // try replacing _= if it is there
+                                       ret = s.url.replace( rts, "$1_=" + ts );
+
+                               // if nothing was replaced, add timestamp to the end
+                               s.url = ret + ( (ret === s.url ) ? ( rquery.test( s.url ) ? "&" : "?" ) + "_=" + ts : "" );
                        }
+               }
 
-                       // close opended socket
-                       xhr.abort();
-                       return false;
+               // Set the correct header, if data is being sent
+               if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+                       requestHeaders[ "content-type" ] = s.contentType;
                }
 
-               if ( s.global ) {
-                       jQuery.triggerGlobal( s, "ajaxSend", [xhr, s] );
+               // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+               if ( s.ifModified ) {
+                       ifModifiedKey = ifModifiedKey || s.url;
+                       if ( jQuery.lastModified[ ifModifiedKey ] ) {
+                               requestHeaders[ "if-modified-since" ] = jQuery.lastModified[ ifModifiedKey ];
+                       }
+                       if ( jQuery.etag[ ifModifiedKey ] ) {
+                               requestHeaders[ "if-none-match" ] = jQuery.etag[ ifModifiedKey ];
+                       }
                }
 
-               // Wait for a response to come back
-               var onreadystatechange = xhr.onreadystatechange = function( isTimeout ) {
-                       // The request was aborted
-                       if ( !xhr || xhr.readyState === 0 || isTimeout === "abort" ) {
-                               // Opera doesn't call onreadystatechange before this point
-                               // so we simulate the call
-                               if ( !requestDone ) {
-                                       jQuery.handleComplete( s, xhr, status, data );
-                               }
+               // Set the Accepts header for the server, depending on the dataType
+               requestHeaders.accept = s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
+                       s.accepts[ s.dataTypes[0] ] + ( s.dataTypes[ 0 ] !== "*" ? ", */*; q=0.01" : "" ) :
+                       s.accepts[ "*" ];
 
-                               requestDone = true;
-                               if ( xhr ) {
-                                       cleanup();
-                               }
+               // Check for headers option
+               for ( i in s.headers ) {
+                       requestHeaders[ i.toLowerCase() ] = s.headers[ i ];
+               }
 
-                       // The transfer is complete and the data is available, or the request timed out
-                       } else if ( !requestDone && xhr && (xhr.readyState === 4 || isTimeout === "timeout") ) {
-                               requestDone = true;
+               // Allow custom headers/mimetypes and early abort
+               if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
+                               // Abort if not done already
+                               done( 0, "abort" );
+                               // Return false
+                               jqXHR = false;
 
-                               status = isTimeout === "timeout" ?
-                                       "timeout" :
-                                       !jQuery.httpSuccess( xhr ) ?
-                                               "error" :
-                                               s.ifModified && jQuery.httpNotModified( xhr, s.url ) ?
-                                                       "notmodified" :
-                                                       "success";
+               } else {
 
-                               var errMsg;
+                       // Install callbacks on deferreds
+                       for ( i in { success: 1, error: 1, complete: 1 } ) {
+                               jqXHR[ i ]( s[ i ] );
+                       }
 
-                               if ( status === "success" ) {
-                                       // Watch for, and catch, XML document parse errors
-                                       try {
-                                               // process the data (runs the xml through httpData regardless of callback)
-                                               data = jQuery.httpData( xhr, s.dataType, s );
-                                       } catch( parserError ) {
-                                               status = "parsererror";
-                                               errMsg = parserError;
-                                       }
-                               }
+                       // Get transport
+                       transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
 
-                               // Make sure that the request was successful or notmodified
-                               if ( status === "success" || status === "notmodified" ) {
-                                       // JSONP handles its own success callback
-                                       if ( !jsonp ) {
-                                               jQuery.handleSuccess( s, xhr, status, data );
-                                       }
-                               } else {
-                                       jQuery.handleError( s, xhr, status, errMsg );
+                       // If no transport, we auto-abort
+                       if ( !transport ) {
+                               done( -1, "No Transport" );
+                       } else {
+                               // Set state as sending
+                               state = jqXHR.readyState = 1;
+                               // Send global event
+                               if ( s.global ) {
+                                       globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
                                }
-
-                               // Fire the complete handlers
-                               if ( !jsonp ) {
-                                       jQuery.handleComplete( s, xhr, status, data );
+                               // Timeout
+                               if ( s.async && s.timeout > 0 ) {
+                                       timeoutTimer = setTimeout( function(){
+                                               jqXHR.abort( "timeout" );
+                                       }, s.timeout );
                                }
 
-                               if ( isTimeout === "timeout" ) {
-                                       xhr.abort();
+                               try {
+                                       transport.send( requestHeaders, done );
+                               } catch (e) {
+                                       // Propagate exception as error if not done
+                                       if ( status < 2 ) {
+                                               done( -1, e );
+                                       // Simply rethrow otherwise
+                                       } else {
+                                               jQuery.error( e );
+                                       }
                                }
-
-                               cleanup();
                        }
-               };
-
-               // Override the abort handler, if we can (IE 6 doesn't allow it, but that's OK)
-               // Opera doesn't fire onreadystatechange at all on abort
-               try {
-                       var oldAbort = xhr.abort;
-                       xhr.abort = function() {
-                               if ( xhr ) {
-                                       // oldAbort has no call property in IE7 so
-                                       // just do it this way, which works in all
-                                       // browsers
-                                       Function.prototype.call.call( oldAbort, xhr );
-                               }
-
-                               onreadystatechange( "abort" );
-                       };
-               } catch( abortError ) {}
-
-               // Timeout checker
-               if ( s.async && s.timeout > 0 ) {
-                       setTimeout(function() {
-                               // Check to see if the request is still happening
-                               if ( xhr && !requestDone ) {
-                                       onreadystatechange( "timeout" );
-                               }
-                       }, s.timeout);
                }
-
-               // Send the data
-               try {
-                       xhr.send( noContent || s.data == null ? null : s.data );
-
-               } catch( sendError ) {
-                       jQuery.handleError( s, xhr, null, sendError );
-
-                       // Fire the complete handlers
-                       jQuery.handleComplete( s, xhr, status, data );
-               }
-
-               // firefox 1.5 doesn't fire statechange for sync requests
-               if ( !s.async ) {
-                       onreadystatechange();
-               }
-
-               // return XMLHttpRequest to allow aborting the request etc.
-               return xhr;
+               return jqXHR;
        },
 
        // Serialize an array of form elements or a set of
@@ -520,37 +710,37 @@ jQuery.extend({
                var s = [],
                        add = function( key, value ) {
                                // If value is a function, invoke it and return its value
-                               value = jQuery.isFunction(value) ? value() : value;
-                               s[ s.length ] = encodeURIComponent(key) + "=" + encodeURIComponent(value);
+                               value = jQuery.isFunction( value ) ? value() : value;
+                               s[ s.length ] = encodeURIComponent( key ) + "=" + encodeURIComponent( value );
                        };
-               
+
                // Set traditional to true for jQuery <= 1.3.2 behavior.
                if ( traditional === undefined ) {
                        traditional = jQuery.ajaxSettings.traditional;
                }
-               
+
                // If an array was passed in, assume that it is an array of form elements.
-               if ( jQuery.isArray(a) || a.jquery ) {
+               if ( jQuery.isArray( a ) || ( a.jquery && !jQuery.isPlainObject( a ) ) ) {
                        // Serialize the form elements
                        jQuery.each( a, function() {
                                add( this.name, this.value );
-                       });
-                       
+                       } );
+
                } else {
                        // If traditional, encode the "old" way (the way 1.3.2 or older
                        // did it), otherwise encode params recursively.
                        for ( var prefix in a ) {
-                               buildParams( prefix, a[prefix], traditional, add );
+                               buildParams( prefix, a[ prefix ], traditional, add );
                        }
                }
 
                // Return the resulting serialization
-               return s.join("&").replace(r20, "+");
+               return s.join( "&" ).replace( r20, "+" );
        }
 });
 
 function buildParams( prefix, obj, traditional, add ) {
-       if ( jQuery.isArray(obj) && obj.length ) {
+       if ( jQuery.isArray( obj ) && obj.length ) {
                // Serialize array item.
                jQuery.each( obj, function( i, v ) {
                        if ( traditional || rbracket.test( prefix ) ) {
@@ -568,18 +758,20 @@ function buildParams( prefix, obj, traditional, add ) {
                                buildParams( prefix + "[" + ( typeof v === "object" || jQuery.isArray(v) ? i : "" ) + "]", v, traditional, add );
                        }
                });
-                       
+
        } else if ( !traditional && obj != null && typeof obj === "object" ) {
-               if ( jQuery.isEmptyObject( obj ) ) {
+               // If we see an array here, it is empty and should be treated as an empty
+               // object
+               if ( jQuery.isArray( obj ) || jQuery.isEmptyObject( obj ) ) {
                        add( prefix, "" );
 
                // Serialize object item.
                } else {
-                       jQuery.each( obj, function( k, v ) {
-                               buildParams( prefix + "[" + k + "]", v, traditional, add );
-                       });
+                       for ( var name in obj ) {
+                               buildParams( prefix + "[" + name + "]", obj[ name ], traditional, add );
+                       }
                }
-                                       
+
        } else {
                // Serialize scalar item.
                add( prefix, obj );
@@ -595,135 +787,162 @@ jQuery.extend({
 
        // Last-Modified header cache for next request
        lastModified: {},
-       etag: {},
+       etag: {}
 
-       handleError: function( s, xhr, status, e ) {
-               // If a local callback was specified, fire it
-               if ( s.error ) {
-                       s.error.call( s.context, xhr, status, e );
-               }
-
-               // Fire the global callback
-               if ( s.global ) {
-                       jQuery.triggerGlobal( s, "ajaxError", [xhr, s, e] );
-               }
-       },
+});
 
-       handleSuccess: function( s, xhr, status, data ) {
-               // If a local callback was specified, fire it and pass it the data
-               if ( s.success ) {
-                       s.success.call( s.context, data, status, xhr );
-               }
+/* Handles responses to an ajax request:
+ * - sets all responseXXX fields accordingly
+ * - finds the right dataType (mediates between content-type and expected dataType)
+ * - returns the corresponding response
+ */
+function ajaxHandleResponses( s, jqXHR, responses ) {
 
-               // Fire the global callback
-               if ( s.global ) {
-                       jQuery.triggerGlobal( s, "ajaxSuccess", [xhr, s] );
-               }
-       },
+       var contents = s.contents,
+               dataTypes = s.dataTypes,
+               responseFields = s.responseFields,
+               ct,
+               type,
+               finalDataType,
+               firstDataType;
 
-       handleComplete: function( s, xhr, status ) {
-               // Process result
-               if ( s.complete ) {
-                       s.complete.call( s.context, xhr, status );
+       // Fill responseXXX fields
+       for( type in responseFields ) {
+               if ( type in responses ) {
+                       jqXHR[ responseFields[type] ] = responses[ type ];
                }
+       }
 
-               // The request was completed
-               if ( s.global ) {
-                       jQuery.triggerGlobal( s, "ajaxComplete", [xhr, s] );
+       // Remove auto dataType and get content-type in the process
+       while( dataTypes[ 0 ] === "*" ) {
+               dataTypes.shift();
+               if ( ct === undefined ) {
+                       ct = jqXHR.getResponseHeader( "content-type" );
                }
+       }
 
-               // Handle the global AJAX counter
-               if ( s.global && jQuery.active-- === 1 ) {
-                       jQuery.event.trigger( "ajaxStop" );
+       // Check if we're dealing with a known content-type
+       if ( ct ) {
+               for ( type in contents ) {
+                       if ( contents[ type ] && contents[ type ].test( ct ) ) {
+                               dataTypes.unshift( type );
+                               break;
+                       }
                }
-       },
-               
-       triggerGlobal: function( s, type, args ) {
-               (s.context && s.context.url == null ? jQuery(s.context) : jQuery.event).trigger(type, args);
-       },
-
-       // Determines if an XMLHttpRequest was successful or not
-       httpSuccess: function( xhr ) {
-               try {
-                       // IE error sometimes returns 1223 when it should be 204 so treat it as success, see #1450
-                       return !xhr.status && location.protocol === "file:" ||
-                               xhr.status >= 200 && xhr.status < 300 ||
-                               xhr.status === 304 || xhr.status === 1223;
-               } catch(e) {}
-
-               return false;
-       },
-
-       // Determines if an XMLHttpRequest returns NotModified
-       httpNotModified: function( xhr, url ) {
-               var lastModified = xhr.getResponseHeader("Last-Modified"),
-                       etag = xhr.getResponseHeader("Etag");
+       }
 
-               if ( lastModified ) {
-                       jQuery.lastModified[url] = lastModified;
+       // Check to see if we have a response for the expected dataType
+       if ( dataTypes[ 0 ] in responses ) {
+               finalDataType = dataTypes[ 0 ];
+       } else {
+               // Try convertible dataTypes
+               for ( type in responses ) {
+                       if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
+                               finalDataType = type;
+                               break;
+                       }
+                       if ( !firstDataType ) {
+                               firstDataType = type;
+                       }
                }
+               // Or just use first one
+               finalDataType = finalDataType || firstDataType;
+       }
 
-               if ( etag ) {
-                       jQuery.etag[url] = etag;
+       // If we found a dataType
+       // We add the dataType to the list if needed
+       // and return the corresponding response
+       if ( finalDataType ) {
+               if ( finalDataType !== dataTypes[ 0 ] ) {
+                       dataTypes.unshift( finalDataType );
                }
+               return responses[ finalDataType ];
+       }
+}
 
-               return xhr.status === 304;
-       },
-
-       httpData: function( xhr, type, s ) {
-               var ct = xhr.getResponseHeader("content-type") || "",
-                       xml = type === "xml" || !type && ct.indexOf("xml") >= 0,
-                       data = xml ? xhr.responseXML : xhr.responseText;
+// Chain conversions given the request and the original response
+function ajaxConvert( s, response ) {
 
-               if ( xml && data.documentElement.nodeName === "parsererror" ) {
-                       jQuery.error( "parsererror" );
-               }
+       // Apply the dataFilter if provided
+       if ( s.dataFilter ) {
+               response = s.dataFilter( response, s.dataType );
+       }
 
-               // Allow a pre-filtering function to sanitize the response
-               // s is checked to keep backwards compatibility
-               if ( s && s.dataFilter ) {
-                       data = s.dataFilter( data, type );
+       var dataTypes = s.dataTypes,
+               converters = {},
+               i,
+               key,
+               length = dataTypes.length,
+               tmp,
+               // Current and previous dataTypes
+               current = dataTypes[ 0 ],
+               prev,
+               // Conversion expression
+               conversion,
+               // Conversion function
+               conv,
+               // Conversion functions (transitive conversion)
+               conv1,
+               conv2;
+
+       // For each dataType in the chain
+       for( i = 1; i < length; i++ ) {
+
+               // Create converters map
+               // with lowercased keys
+               if ( i === 1 ) {
+                       for( key in s.converters ) {
+                               if( typeof key === "string" ) {
+                                       converters[ key.toLowerCase() ] = s.converters[ key ];
+                               }
+                       }
                }
 
-               // The filter can actually parse the response
-               if ( typeof data === "string" ) {
-                       // Get the JavaScript object, if JSON is used.
-                       if ( type === "json" || !type && ct.indexOf("json") >= 0 ) {
-                               data = jQuery.parseJSON( data );
-
-                       // If the type is "script", eval it in global context
-                       } else if ( type === "script" || !type && ct.indexOf("javascript") >= 0 ) {
-                               jQuery.globalEval( data );
+               // Get the dataTypes
+               prev = current;
+               current = dataTypes[ i ];
+
+               // If current is auto dataType, update it to prev
+               if( current === "*" ) {
+                       current = prev;
+               // If no auto and dataTypes are actually different
+               } else if ( prev !== "*" && prev !== current ) {
+
+                       // Get the converter
+                       conversion = prev + " " + current;
+                       conv = converters[ conversion ] || converters[ "* " + current ];
+
+                       // If there is no direct converter, search transitively
+                       if ( !conv ) {
+                               conv2 = undefined;
+                               for( conv1 in converters ) {
+                                       tmp = conv1.split( " " );
+                                       if ( tmp[ 0 ] === prev || tmp[ 0 ] === "*" ) {
+                                               conv2 = converters[ tmp[1] + " " + current ];
+                                               if ( conv2 ) {
+                                                       conv1 = converters[ conv1 ];
+                                                       if ( conv1 === true ) {
+                                                               conv = conv2;
+                                                       } else if ( conv2 === true ) {
+                                                               conv = conv1;
+                                                       }
+                                                       break;
+                                               }
+                                       }
+                               }
+                       }
+                       // If we found no converter, dispatch an error
+                       if ( !( conv || conv2 ) ) {
+                               jQuery.error( "No conversion from " + conversion.replace(" "," to ") );
+                       }
+                       // If found converter is not an equivalence
+                       if ( conv !== true ) {
+                               // Convert with 1 or 2 converters accordingly
+                               response = conv ? conv( response ) : conv2( conv1(response) );
                        }
                }
-
-               return data;
        }
-
-});
-
-/*
- * Create the request object; 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.
- */
-if ( window.ActiveXObject ) {
-       jQuery.ajaxSettings.xhr = function() {
-               if ( window.location.protocol !== "file:" ) {
-                       try {
-                               return new window.XMLHttpRequest();
-                       } catch(xhrError) {}
-               }
-
-               try {
-                       return new window.ActiveXObject("Microsoft.XMLHTTP");
-               } catch(activeError) {}
-       };
+       return response;
 }
 
-// Does this browser support XHR requests?
-jQuery.support.ajax = !!jQuery.ajaxSettings.xhr();
-
 })( jQuery );