X-Git-Url: http://git.asbjorn.biz/?p=jquery.git;a=blobdiff_plain;f=src%2Fajax.js;h=2d20040a932cac766ed60d84be17635d2724cf5f;hp=bc3696ee8e5c9e133a28b89fcb0517bd18aa80bf;hb=e3cc440934fcb03bfeb10fb6281615409ad6f483;hpb=ee22c8b34bb801f26cacc67a1a3a0ac595fe7928

diff --git a/src/ajax.js b/src/ajax.js
index bc3696e..2d20040 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -7,15 +7,13 @@ var r20 = /%20/g,
 	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,
 	rnoContent = /^(?:GET|HEAD)$/,
+	rprotocol = /^\/\//,
 	rquery = /\?/,
 	rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
 	rselectTextarea = /^(?:select|textarea)/i,
 	rspacesAjax = /\s+/,
 	rts = /([?&])_=[^&]*/,
-	rurl = /^(\w+:)?\/\/([^\/?#:]+)(?::(\d+))?/,
-
-	// Slice function
-	sliceFunc = Array.prototype.slice,
+	rurl = /^(\w+:)\/\/([^\/?#:]+)(?::(\d+))?/,
 
 	// Keep a copy of the old load method
 	_load = jQuery.fn.load,
@@ -36,7 +34,98 @@ var r20 = /%20/g,
 	 * 2) the catchall symbol "*" can be used
 	 * 3) selection will start with transport dataType and THEN go to "*" if needed
 	 */
-	transports = {};
+	transports = {},
+
+	// Stored document location array
+	ajaxLocation;
+
+// #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;
+}
+
+// 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 not done already
+		if ( typeof selection === "string" ) {
+			if ( 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 ) {
@@ -81,14 +170,14 @@ jQuery.fn.extend({
 			dataType: "html",
 			data: params,
 			// Complete callback (responseText is used internally)
-			complete: function( jXHR, status, responseText ) {
-				// Store the response as specified by the jXHR object
-				responseText = jXHR.responseText;
+			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 ( jXHR.isResolved() ) {
+				if ( jqXHR.isResolved() ) {
 					// #4825: Get the actual response in case
 					// a dataFilter is present in ajaxSettings
-					jXHR.done(function( r ) {
+					jqXHR.done(function( r ) {
 						responseText = r;
 					});
 					// See if a selector was specified
@@ -107,7 +196,7 @@ jQuery.fn.extend({
 				}
 
 				if ( callback ) {
-					self.each( callback, [ responseText, status, jXHR ] );
+					self.each( callback, [ responseText, status, jqXHR ] );
 				}
 			}
 		});
@@ -186,7 +275,7 @@ jQuery.extend({
 	},
 
 	ajaxSettings: {
-		url: location.href,
+		url: ajaxLocation,
 		global: true,
 		type: "GET",
 		contentType: "application/x-www-form-urlencoded",
@@ -242,20 +331,14 @@ jQuery.extend({
 		}
 	},
 
-	ajaxPrefilter: function( a, b ) {
-		prefiltersOrTransports( prefilters, a, b );
-	},
-
-	ajaxTransport: function( a, b ) {
-		return prefiltersOrTransports( transports, a, b );
-	},
+	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
+	ajaxTransport: addToPrefiltersOrTransports( transports ),
 
 	// Main method
 	ajax: function( url, options ) {
 
-		// If options is not an object,
-		// we simulate pre-1.5 signature
-		if ( typeof options !== "object" ) {
+		// If url is an object, simulate pre-1.5 signature
+		if ( typeof url === "object" ) {
 			options = url;
 			url = undefined;
 		}
@@ -265,18 +348,24 @@ jQuery.extend({
 
 		var // Create the final options object
 			s = jQuery.extend( true, {}, jQuery.ajaxSettings, options ),
-			// Callbacks contexts
+			// 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,
-			globalEventContext = callbackContext === s ? jQuery.event : jQuery( callbackContext ),
+			// 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
@@ -287,15 +376,13 @@ jQuery.extend({
 			// timeout handle
 			timeoutTimer,
 			// Cross-domain detection vars
-			loc = document.location,
-			protocol = loc.protocol || "http:",
 			parts,
-			// The jXHR state
+			// The jqXHR state
 			state = 0,
 			// Loop variable
 			i,
 			// Fake xhr
-			jXHR = {
+			jqXHR = {
 
 				readyState: 0,
 
@@ -329,8 +416,9 @@ jQuery.extend({
 
 				// Cancel the request
 				abort: function( statusText ) {
+					statusText = statusText || "abort";
 					if ( transport ) {
-						transport.abort( statusText || "abort" );
+						transport.abort( statusText );
 					}
 					done( 0, statusText );
 					return this;
@@ -356,19 +444,19 @@ jQuery.extend({
 			}
 
 			// Dereference transport for early garbage collection
-			// (no matter how long the jXHR object will be used)
+			// (no matter how long the jqXHR object will be used)
 			transport = undefined;
 
 			// Cache response headers
 			responseHeadersString = headers || "";
 
 			// Set readyState
-			jXHR.readyState = status ? 4 : 0;
+			jqXHR.readyState = status ? 4 : 0;
 
 			var isSuccess,
 				success,
-				error = ( statusText = statusText || "error" ),
-				response = responses ? ajaxHandleResponses( s, jXHR, responses ) : undefined,
+				error,
+				response = responses ? ajaxHandleResponses( s, jqXHR, responses ) : undefined,
 				lastModified,
 				etag;
 
@@ -378,11 +466,11 @@ jQuery.extend({
 				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
 				if ( s.ifModified ) {
 
-					if ( ( lastModified = jXHR.getResponseHeader( "Last-Modified" ) ) ) {
-						jQuery.lastModified[ s.url ] = lastModified;
+					if ( ( lastModified = jqXHR.getResponseHeader( "Last-Modified" ) ) ) {
+						jQuery.lastModified[ ifModifiedKey ] = lastModified;
 					}
-					if ( ( etag = jXHR.getResponseHeader( "Etag" ) ) ) {
-						jQuery.etag[ s.url ] = etag;
+					if ( ( etag = jqXHR.getResponseHeader( "Etag" ) ) ) {
+						jQuery.etag[ ifModifiedKey ] = etag;
 					}
 				}
 
@@ -402,51 +490,61 @@ jQuery.extend({
 					} catch(e) {
 						// We have a parsererror
 						statusText = "parsererror";
-						error = "" + e;
+						error = e;
+					}
+				}
+			} 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;
 					}
 				}
 			}
 
 			// Set data for the fake xhr object
-			jXHR.status = status;
-			jXHR.statusText = statusText;
+			jqXHR.status = status;
+			jqXHR.statusText = statusText;
 
 			// Success/Error
 			if ( isSuccess ) {
-				deferred.resolveWith( callbackContext, [ success, statusText, jXHR ] );
+				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
 			} else {
-				deferred.rejectWith( callbackContext, [ jXHR, statusText, error ] );
+				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
 			}
 
 			// Status-dependent callbacks
-			jXHR.statusCode( statusCode );
+			jqXHR.statusCode( statusCode );
 			statusCode = undefined;
 
 			if ( s.global ) {
 				globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ),
-						[ jXHR, s, isSuccess ? success : error ] );
+						[ jqXHR, s, isSuccess ? success : error ] );
 			}
 
 			// Complete
-			completeDeferred.resolveWith( callbackContext, [ jXHR, statusText ] );
+			completeDeferred.resolveWith( callbackContext, [ jqXHR, statusText ] );
 
 			if ( s.global ) {
-				globalEventContext.trigger( "ajaxComplete", [ jXHR, s] );
+				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s] );
 				// Handle the global AJAX counter
-				if ( ! --jQuery.active ) {
+				if ( !( --jQuery.active ) ) {
 					jQuery.event.trigger( "ajaxStop" );
 				}
 			}
 		}
 
 		// Attach deferreds
-		deferred.promise( jXHR );
-		jXHR.success = jXHR.done;
-		jXHR.error = jXHR.fail;
-		jXHR.complete = completeDeferred.done;
+		deferred.promise( jqXHR );
+		jqXHR.success = jqXHR.done;
+		jqXHR.error = jqXHR.fail;
+		jqXHR.complete = completeDeferred.done;
 
 		// Status-dependent callbacks
-		jXHR.statusCode = function( map ) {
+		jqXHR.statusCode = function( map ) {
 			if ( map ) {
 				var tmp;
 				if ( state < 2 ) {
@@ -454,16 +552,17 @@ jQuery.extend({
 						statusCode[ tmp ] = [ statusCode[tmp], map[tmp] ];
 					}
 				} else {
-					tmp = map[ jXHR.status ];
-					jXHR.then( tmp, tmp );
+					tmp = map[ jqXHR.status ];
+					jqXHR.then( tmp, tmp );
 				}
 			}
 			return this;
 		};
 
 		// 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, "" );
+		s.url = ( "" + ( url || s.url ) ).replace( rhash, "" ).replace( rprotocol, ajaxLocation[ 1 ] + "//" );
 
 		// Extract dataTypes list
 		s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().split( rspacesAjax );
@@ -471,12 +570,10 @@ jQuery.extend({
 		// Determine if a cross-domain request is in order
 		if ( !s.crossDomain ) {
 			parts = rurl.exec( s.url.toLowerCase() );
-			s.crossDomain = !!(
-					parts &&
-					( parts[ 1 ] && parts[ 1 ] != protocol ||
-						parts[ 2 ] != loc.hostname ||
-						( parts[ 3 ] || ( ( parts[ 1 ] || protocol ) === "http:" ? 80 : 443 ) ) !=
-							( loc.port || ( protocol === "http:" ? 80 : 443 ) ) )
+			s.crossDomain = !!( parts &&
+				( parts[ 1 ] != ajaxLocation[ 1 ] || parts[ 2 ] != ajaxLocation[ 2 ] ||
+					( parts[ 3 ] || ( parts[ 1 ] === "http:" ? 80 : 443 ) ) !=
+						( ajaxLocation[ 3 ] || ( ajaxLocation[ 1 ] === "http:" ? 80 : 443 ) ) )
 			);
 		}
 
@@ -486,7 +583,7 @@ jQuery.extend({
 		}
 
 		// Apply prefilters
-		jQuery.ajaxPrefilter( s, options );
+		inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
 
 		// Uppercase the type
 		s.type = s.type.toUpperCase();
@@ -507,6 +604,9 @@ jQuery.extend({
 				s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.data;
 			}
 
+			// Get ifModifiedKey before adding the anti-cache parameter
+			ifModifiedKey = s.url;
+
 			// Add anti-cache in url if needed
 			if ( s.cache === false ) {
 
@@ -526,11 +626,12 @@ jQuery.extend({
 
 		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
 		if ( s.ifModified ) {
-			if ( jQuery.lastModified[ s.url ] ) {
-				requestHeaders[ "if-modified-since" ] = jQuery.lastModified[ s.url ];
+			ifModifiedKey = ifModifiedKey || s.url;
+			if ( jQuery.lastModified[ ifModifiedKey ] ) {
+				requestHeaders[ "if-modified-since" ] = jQuery.lastModified[ ifModifiedKey ];
 			}
-			if ( jQuery.etag[ s.url ] ) {
-				requestHeaders[ "if-none-match" ] = jQuery.etag[ s.url ];
+			if ( jQuery.etag[ ifModifiedKey ] ) {
+				requestHeaders[ "if-none-match" ] = jQuery.etag[ ifModifiedKey ];
 			}
 		}
 
@@ -545,36 +646,36 @@ jQuery.extend({
 		}
 
 		// Allow custom headers/mimetypes and early abort
-		if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jXHR, s ) === false || state === 2 ) ) {
+		if ( s.beforeSend && ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
 				// Abort if not done already
 				done( 0, "abort" );
 				// Return false
-				jXHR = false;
+				jqXHR = false;
 
 		} else {
 
 			// Install callbacks on deferreds
-			for ( i in { success:1, error:1, complete:1 } ) {
-				jXHR[ i ]( s[ i ] );
+			for ( i in { success: 1, error: 1, complete: 1 } ) {
+				jqXHR[ i ]( s[ i ] );
 			}
 
 			// Get transport
-			transport = jQuery.ajaxTransport( s, options );
+			transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
 
 			// If no transport, we auto-abort
 			if ( !transport ) {
-				done( 0, "notransport" );
+				done( -1, "No Transport" );
 			} else {
 				// Set state as sending
-				state = jXHR.readyState = 1;
+				state = jqXHR.readyState = 1;
 				// Send global event
 				if ( s.global ) {
-					globalEventContext.trigger( "ajaxSend", [ jXHR, s ] );
+					globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
 				}
 				// Timeout
 				if ( s.async && s.timeout > 0 ) {
 					timeoutTimer = setTimeout( function(){
-						jXHR.abort( "timeout" );
+						jqXHR.abort( "timeout" );
 					}, s.timeout );
 				}
 
@@ -582,9 +683,8 @@ jQuery.extend({
 					transport.send( requestHeaders, done );
 				} catch (e) {
 					// Propagate exception as error if not done
-					if ( status === 1 ) {
-						done( 0, "error", "" + e );
-						jXHR = false;
+					if ( status < 2 ) {
+						done( -1, e );
 					// Simply rethrow otherwise
 					} else {
 						jQuery.error( e );
@@ -592,7 +692,7 @@ jQuery.extend({
 				}
 			}
 		}
-		return jXHR;
+		return jqXHR;
 	},
 
 	// Serialize an array of form elements or a set of
@@ -611,7 +711,7 @@ jQuery.extend({
 		}
 
 		// 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 );
@@ -630,6 +730,9 @@ jQuery.extend({
 	}
 });
 
+// Segment ajaxLocation into parts
+ajaxLocation = rurl.exec( ajaxLocation.toLowerCase() );
+
 function buildParams( prefix, obj, traditional, add ) {
 	if ( jQuery.isArray( obj ) && obj.length ) {
 		// Serialize array item.
@@ -658,9 +761,9 @@ function buildParams( prefix, obj, traditional, add ) {
 
 		// 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 {
@@ -682,102 +785,12 @@ jQuery.extend({
 
 });
 
-// Base inspection function for prefilters and transports
-function inspectPrefiltersOrTransports( structure, options, originalOptions, dataType, tested ) {
-
-	dataType = dataType || options.dataTypes[ 0 ];
-	tested = tested || {};
-
-	if ( !tested[ dataType ] ) {
-
-		tested[ dataType ] = true;
-
-		var list = structure[ dataType ],
-			i = 0,
-			length = list ? list.length : 0,
-			executeOnly = structure === prefilters,
-			selected;
-
-		for(; ( executeOnly || !selected ) && i < length; i++ ) {
-			selected = list[ i ]( options, originalOptions );
-			// If we got redirected to a different dataType,
-			// we add it and switch to the corresponding list
-			if ( typeof selected === "string" && selected !== dataType ) {
-				options.dataTypes.unshift( selected );
-				selected = inspectPrefiltersOrTransports(
-						structure, options, originalOptions, selected, tested );
-				// We always break in order not to continue
-				// to iterate in previous list
-				break;
-			}
-		}
-		// If we're only executing or nothing was selected
-		// we try the catchall dataType
-		if ( !tested[ "*" ] && ( executeOnly || ! selected ) ) {
-			selected = inspectPrefiltersOrTransports(
-					structure, options, originalOptions, "*" ,tested );
-		}
-		// This will be ignored by ajaxPrefilter
-		// so it's safe to return no matter what
-		return selected;
-	}
-}
-
-function addToPrefiltersOrTransports( structure, dataTypeExpression, functor ) {
-
-	var dataTypes = dataTypeExpression.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" ]( functor );
-	}
-}
-
-// Base function for both ajaxPrefilter and ajaxTransport
-function prefiltersOrTransports( structure, arg1, arg2, type /* internal */ ) {
-
-	type = jQuery.type( arg1 );
-
-	if ( type === "object" ) {
-		// We have an options map so we have to inspect the structure
-		return inspectPrefiltersOrTransports( structure, arg1, arg2 );
-	} else {
-		// We're requested to add to the structure
-		// Signature is ( dataTypeExpression, function )
-		// with dataTypeExpression being optional and
-		// defaulting to auto ("*")
-		type = ( type === "function" );
-		if ( type ) {
-			arg2 = arg1;
-			arg1 = undefined;
-		}
-		// We control that the second argument is really a function
-		if ( type || jQuery.isFunction( arg2 ) ) {
-			addToPrefiltersOrTransports( structure, arg1 || "*", arg2 );
-		}
-	}
-}
-
 /* 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, jXHR, responses ) {
+function ajaxHandleResponses( s, jqXHR, responses ) {
 
 	var contents = s.contents,
 		dataTypes = s.dataTypes,
@@ -790,7 +803,7 @@ function ajaxHandleResponses( s, jXHR, responses ) {
 	// Fill responseXXX fields
 	for( type in responseFields ) {
 		if ( type in responses ) {
-			jXHR[ responseFields[type] ] = responses[ type ];
+			jqXHR[ responseFields[type] ] = responses[ type ];
 		}
 	}
 
@@ -798,7 +811,7 @@ function ajaxHandleResponses( s, jXHR, responses ) {
 	while( dataTypes[ 0 ] === "*" ) {
 		dataTypes.shift();
 		if ( ct === undefined ) {
-			ct = jXHR.getResponseHeader( "content-type" );
+			ct = jqXHR.getResponseHeader( "content-type" );
 		}
 	}
 
@@ -850,8 +863,9 @@ function ajaxConvert( s, response ) {
 	}
 
 	var dataTypes = s.dataTypes,
-		converters = s.converters,
+		converters = {},
 		i,
+		key,
 		length = dataTypes.length,
 		tmp,
 		// Current and previous dataTypes
@@ -861,13 +875,23 @@ function ajaxConvert( s, response ) {
 		conversion,
 		// Conversion function
 		conv,
-		// Conversion functions (when text is used in-between)
+		// 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 ];
+				}
+			}
+		}
+
 		// Get the dataTypes
 		prev = current;
 		current = dataTypes[ i ];
@@ -883,7 +907,7 @@ function ajaxConvert( s, response ) {
 			conv = converters[ conversion ] || converters[ "* " + current ];
 
 			// If there is no direct converter, search transitively
-			if ( ! conv ) {
+			if ( !conv ) {
 				conv2 = undefined;
 				for( conv1 in converters ) {
 					tmp = conv1.split( " " );
@@ -902,7 +926,7 @@ function ajaxConvert( s, response ) {
 				}
 			}
 			// If we found no converter, dispatch an error
-			if ( ! ( conv || conv2 ) ) {
+			if ( !( conv || conv2 ) ) {
 				jQuery.error( "No conversion from " + conversion.replace(" "," to ") );
 			}
 			// If found converter is not an equivalence