No ticket: compress ajax. Close gh-1041.

1 files changed, 255 insertions, 282 deletions

diff --git a/src/ajax.js b/src/ajax.js
index 6dff6176c..6b9b4def8 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -3,17 +3,16 @@ var
 	ajaxLocParts,
 	ajaxLocation,
 	
-	antiCacheValue = jQuery.now(),
+	ajax_nonce = jQuery.now(),
 
+	ajax_rquery = /\?/,
 	rhash = /#.*$/,
+	rts = /([?&])_=[^&]*/,
 	rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg, // IE leaves an \r character at EOL
 	// #7653, #8125, #8152: local protocol detection
-	rlocalProtocol = /^(?:about|app|app\-storage|.+\-extension|file|res|widget):$/,
+	rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
 	rnoContent = /^(?:GET|HEAD)$/,
 	rprotocol = /^\/\//,
-	rquery = /\?/,
-	rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
-	rts = /([?&])_=[^&]*/,
 	rurl = /^([\w\+\.\-]+:)(?:\/\/([^\/?#:]*)(?::(\d+)|)|)/,
 
 	// Keep a copy of the old load method
@@ -38,7 +37,7 @@ var
 	transports = {},
 
 	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
-	allTypes = ["*/"] + ["*"];
+	allTypes = "*/".concat("*");
 
 // #8138, IE may throw an exception when accessing
 // a field from window.location if document.domain has been set
@@ -66,24 +65,22 @@ function addToPrefiltersOrTransports( structure ) {
 			dataTypeExpression = "*";
 		}
 
-		var dataType, list, placeBefore,
-			dataTypes = dataTypeExpression.toLowerCase().split( core_rspace ),
+		var dataType,
 			i = 0,
-			length = dataTypes.length;
+			dataTypes = dataTypeExpression.toLowerCase().split( core_rspace );
 
 		if ( jQuery.isFunction( func ) ) {
 			// 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 ) || "*";
+			while ( (dataType = dataTypes[i++]) ) {
+				// Prepend if requested
+				if ( dataType[0] === "+" ) {
+					dataType = dataType.slice( 1 ) || "*";
+					(structure[ dataType ] = structure[ dataType ] || []).unshift( func );
+
+				// Otherwise append
+				} else {
+					(structure[ dataType ] = structure[ dataType ] || []).push( func );
 				}
-				list = structure[ dataType ] = structure[ dataType ] || [];
-				// then we add to the structure accordingly
-				list[ placeBefore ? "unshift" : "push" ]( func );
 			}
 		}
 	};
@@ -120,14 +117,17 @@ function inspectPrefiltersOrTransports( structure, options, originalOptions, jqX
 function ajaxExtend( target, src ) {
 	var key, deep,
 		flatOptions = jQuery.ajaxSettings.flatOptions || {};
+
 	for ( key in src ) {
 		if ( src[ key ] !== undefined ) {
-			( flatOptions[ key ] ? target : ( deep || ( deep = {} ) ) )[ key ] = src[ key ];
+			( flatOptions[ key ] ? target : ( deep || (deep = {}) ) )[ key ] = src[ key ];
 		}
 	}
 	if ( deep ) {
 		jQuery.extend( true, target, deep );
 	}
+
+	return target;
 }
 
 jQuery.fn.load = function( url, params, callback ) {
@@ -135,11 +135,6 @@ jQuery.fn.load = function( url, params, callback ) {
 		return _load.apply( this, arguments );
 	}
 
-	// Don't do a request if no elements are being requested
-	if ( !this.length ) {
-		return this;
-	}
-
 	var selector, type, response,
 		self = this,
 		off = url.indexOf(" ");
@@ -161,49 +156,41 @@ jQuery.fn.load = function( url, params, callback ) {
 		type = "POST";
 	}
 
-	// Request the remote document
-	jQuery.ajax({
-		url: url,
-
-		// if "type" variable is undefined, then "GET" method will be used
-		type: type,
-		dataType: "html",
-		data: params,
-		complete: function( jqXHR, status ) {
-			if ( callback ) {
-				self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
-			}
-		}
-	}).done(function( responseText ) {
-
-		// Save response for use in complete callback
-		response = arguments;
+	// If we have elements to modify, make the request
+	if ( self.length > 0 ) {
+		jQuery.ajax({
+			url: url,
 
-		// See if a selector was specified
-		self.html( selector ?
+			// if "type" variable is undefined, then "GET" method will be used
+			type: type,
+			dataType: "html",
+			data: params
+		}).done(function( responseText ) {
 
-			// Create a dummy div to hold the results
-			jQuery("<div>")
+			// Save response for use in complete callback
+			response = arguments;
 
-				// inject the contents of the document in, removing the scripts
-				// to avoid any 'Permission Denied' errors in IE
-				.append( responseText.replace( rscript, "" ) )
+			self.html( selector ?
 
-				// Locate the specified elements
-				.find( selector ) :
+				// If a selector was specified, locate the right elements in a dummy div
+				// Exclude scripts to avoid IE 'Permission Denied' errors
+				jQuery("<div>").append( jQuery.parseHTML( responseText ) ).find( selector ) :
 
-			// If not, just inject the full result
-			responseText );
+				// Otherwise use the full result
+				responseText );
 
-	});
+		}).complete( callback && function( jqXHR, status ) {
+			self.each( callback, response || [ jqXHR.responseText, status, jqXHR ] );
+		});
+	}
 
 	return this;
 };
 
 // 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.on( o, f );
+jQuery.each( [ "ajaxStart", "ajaxStop", "ajaxComplete", "ajaxError", "ajaxSuccess", "ajaxSend" ], function( i, type ){
+	jQuery.fn[ type ] = function( fn ){
+		return this.on( type, fn );
 	};
 });
 
@@ -217,50 +204,32 @@ jQuery.each( [ "get", "post" ], function( i, method ) {
 		}
 
 		return jQuery.ajax({
-			type: method,
 			url: url,
+			type: method,
+			dataType: type,
 			data: data,
-			success: callback,
-			dataType: type
+			success: callback
 		});
 	};
 });
 
 jQuery.extend({
 
-	getScript: function( url, callback ) {
-		return jQuery.get( url, undefined, callback, "script" );
-	},
-
-	getJSON: function( url, data, callback ) {
-		return jQuery.get( url, data, callback, "json" );
-	},
-
-	// Creates a full fledged settings object into target
-	// with both ajaxSettings and settings fields.
-	// If target is omitted, writes into ajaxSettings.
-	ajaxSetup: function( target, settings ) {
-		if ( settings ) {
-			// Building a settings object
-			ajaxExtend( target, jQuery.ajaxSettings );
-		} else {
-			// Extending ajaxSettings
-			settings = target;
-			target = jQuery.ajaxSettings;
-		}
-		ajaxExtend( target, settings );
+	// Counter for holding the number of active queries
+	active: 0,
 
-		return target;
-	},
+	// Last-Modified header cache for next request
+	lastModified: {},
+	etag: {},
 
 	ajaxSettings: {
 		url: ajaxLocation,
+		type: "GET",
 		isLocal: rlocalProtocol.test( ajaxLocParts[ 1 ] ),
 		global: true,
-		type: "GET",
-		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
 		processData: true,
 		async: true,
+		contentType: "application/x-www-form-urlencoded; charset=UTF-8",
 		/*
 		timeout: 0,
 		data: null,
@@ -274,11 +243,11 @@ jQuery.extend({
 		*/
 
 		accepts: {
-			xml: "application/xml, text/xml",
-			html: "text/html",
+			"*": allTypes,
 			text: "text/plain",
-			json: "application/json, text/javascript",
-			"*": allTypes
+			html: "text/html",
+			xml: "application/xml, text/xml",
+			json: "application/json, text/javascript"
 		},
 
 		contents: {
@@ -292,9 +261,8 @@ jQuery.extend({
 			text: "responseText"
 		},
 
-		// 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
+		// Data converters
+		// Keys separate source (or catchall "*") and destination types with a single space
 		converters: {
 
 			// Convert anything to text
@@ -315,11 +283,24 @@ jQuery.extend({
 		// and when you create one that shouldn't be
 		// deep extended (see ajaxExtend)
 		flatOptions: {
-			context: true,
-			url: true
+			url: true,
+			context: true
 		}
 	},
 
+	// Creates a full fledged settings object into target
+	// with both ajaxSettings and settings fields.
+	// If target is omitted, writes into ajaxSettings.
+	ajaxSetup: function( target, settings ) {
+		return settings ?
+
+			// Building a settings object
+			ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
+
+			// Extending ajaxSettings
+			ajaxExtend( jQuery.ajaxSettings, target );
+	},
+
 	ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
 	ajaxTransport: addToPrefiltersOrTransports( transports ),
 
@@ -335,13 +316,12 @@ jQuery.extend({
 		// Force options to be an object
 		options = options || {};
 
-		var // ifModified key
+		var transport,
+			// ifModified key
 			ifModifiedKey,
 			// Response headers
 			responseHeadersString,
 			responseHeaders,
-			// transport
-			transport,
 			// timeout handle
 			timeoutTimer,
 			// Cross-domain detection vars
@@ -354,15 +334,13 @@ jQuery.extend({
 			s = jQuery.ajaxSetup( {}, options ),
 			// Callbacks context
 			callbackContext = s.context || s,
-			// Context for global events
-			// It's the callbackContext if one was provided in the options
-			// and if it's a DOM node or a jQuery collection
-			globalEventContext = callbackContext !== s &&
-				( callbackContext.nodeType || callbackContext instanceof jQuery ) ?
-						jQuery( callbackContext ) : jQuery.event,
+			// Context for global events is callbackContext if it is a DOM node or jQuery collection
+			globalEventContext = s.context && ( callbackContext.nodeType || callbackContext.jquery ) ?
+				jQuery( callbackContext ) :
+				jQuery.event,
 			// Deferreds
 			deferred = jQuery.Deferred(),
-			completeDeferred = jQuery.Callbacks( "once memory" ),
+			completeDeferred = jQuery.Callbacks("once memory"),
 			// Status-dependent callbacks
 			statusCode = s.statusCode || {},
 			// Headers (they are sent all at once)
@@ -374,37 +352,36 @@ jQuery.extend({
 			strAbort = "canceled",
 			// Fake xhr
 			jqXHR = {
-
 				readyState: 0,
 
-				// Caches the header
-				setRequestHeader: function( name, value ) {
-					if ( !state ) {
-						var lname = name.toLowerCase();
-						name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
-						requestHeaders[ name ] = 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 ) ) ) {
+							while ( (match = rheaders.exec( responseHeadersString )) ) {
 								responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
 							}
 						}
 						match = responseHeaders[ key.toLowerCase() ];
 					}
-					return match === undefined ? null : match;
+					return match == null ? null : match;
+				},
+
+				// Raw string
+				getAllResponseHeaders: function() {
+					return state === 2 ? responseHeadersString : null;
+				},
+
+				// Caches the header
+				setRequestHeader: function( name, value ) {
+					var lname = name.toLowerCase();
+					if ( !state ) {
+						name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
+						requestHeaders[ name ] = value;
+					}
+					return this;
 				},
 
 				// Overrides response content-type header
@@ -415,148 +392,38 @@ jQuery.extend({
 					return this;
 				},
 
+				// Status-dependent callbacks
+				statusCode: function( map ) {
+					var code;
+					if ( map ) {
+						if ( state < 2 ) {
+							for ( code in map ) {
+								// Lazy-add the new callback in a way that preserves old ones
+								statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
+							}
+						} else {
+							// Execute the appropriate callbacks
+							jqXHR.always( map[ jqXHR.status ] );
+						}
+					}
+					return this;
+				},
+
 				// Cancel the request
 				abort: function( statusText ) {
-					statusText = statusText || strAbort;
+					var finalText = statusText || strAbort;
 					if ( transport ) {
-						transport.abort( statusText );
+						transport.abort( finalText );
 					}
-					done( 0, statusText );
+					done( 0, finalText );
 					return this;
 				}
 			};
 
-		// 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, nativeStatusText, responses, headers ) {
-			var isSuccess, success, error, response, modified,
-				statusText = nativeStatusText;
-
-			// Called once
-			if ( state === 2 ) {
-				return;
-			}
-
-			// State is "done" now
-			state = 2;
-
-			// Clear timeout if it exists
-			if ( timeoutTimer ) {
-				clearTimeout( timeoutTimer );
-			}
-
-			// 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 > 0 ? 4 : 0;
-
-			// Get response data
-			if ( responses ) {
-				response = ajaxHandleResponses( s, jqXHR, responses );
-			}
-
-			// If successful, handle type chaining
-			if ( status >= 200 && status < 300 || status === 304 ) {
-
-				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
-				if ( s.ifModified ) {
-
-					modified = jqXHR.getResponseHeader("Last-Modified");
-					if ( modified ) {
-						jQuery.lastModified[ ifModifiedKey ] = modified;
-					}
-					modified = jqXHR.getResponseHeader("Etag");
-					if ( modified ) {
-						jQuery.etag[ ifModifiedKey ] = modified;
-					}
-				}
-
-				// If not modified
-				if ( status === 304 ) {
-
-					statusText = "notmodified";
-					isSuccess = true;
-
-				// If we have data
-				} else {
-
-					isSuccess = ajaxConvert( s, response );
-					statusText = isSuccess.state;
-					success = isSuccess.data;
-					error = isSuccess.error;
-					isSuccess = !error;
-				}
-			} else {
-				// We extract error from statusText
-				// then normalize statusText and status for non-aborts
-				error = statusText;
-				if ( !statusText || status ) {
-					statusText = "error";
-					if ( status < 0 ) {
-						status = 0;
-					}
-				}
-			}
-
-			// Set data for the fake xhr object
-			jqXHR.status = status;
-			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
-
-			// Success/Error
-			if ( isSuccess ) {
-				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
-			} else {
-				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
-			}
-
-			// Status-dependent callbacks
-			jqXHR.statusCode( statusCode );
-			statusCode = undefined;
-
-			if ( fireGlobals ) {
-				globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ),
-						[ jqXHR, s, isSuccess ? success : error ] );
-			}
-
-			// Complete
-			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
-
-			if ( fireGlobals ) {
-				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
-				// Handle the global AJAX counter
-				if ( !( --jQuery.active ) ) {
-					jQuery.event.trigger( "ajaxStop" );
-				}
-			}
-		}
-
 		// Attach deferreds
-		deferred.promise( jqXHR );
+		deferred.promise( jqXHR ).complete = completeDeferred.add;
 		jqXHR.success = jqXHR.done;
 		jqXHR.error = jqXHR.fail;
-		jqXHR.complete = completeDeferred.add;
-
-		// 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.always( tmp );
-				}
-			}
-			return this;
-		};
 
 		// Remove hash character (#7531: and string promotion)
 		// Add protocol if not provided (#5866: IE7 issue with protocol-less urls)
@@ -593,23 +460,23 @@ jQuery.extend({
 		// We can fire global events as of now if asked to
 		fireGlobals = s.global;
 
+		// Watch for a new set of requests
+		if ( fireGlobals && jQuery.active++ === 0 ) {
+			jQuery.event.trigger("ajaxStart");
+		}
+
 		// Uppercase the type
 		s.type = s.type.toUpperCase();
 
 		// Determine if request has content
 		s.hasContent = !rnoContent.test( s.type );
 
-		// Watch for a new set of requests
-		if ( fireGlobals && jQuery.active++ === 0 ) {
-			jQuery.event.trigger( "ajaxStart" );
-		}
-
 		// More options handling for requests with no content
 		if ( !s.hasContent ) {
 
 			// If data is available, append data to url
 			if ( s.data ) {
-				s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.data;
+				s.url += ( ajax_rquery.test( s.url ) ? "&" : "?" ) + s.data;
 				// #9682: remove data so that it's not used in an eventual retry
 				delete s.data;
 			}
@@ -619,21 +486,16 @@ jQuery.extend({
 
 			// Add anti-cache in url if needed
 			if ( s.cache === false ) {
+				s.url = rts.test( ifModifiedKey ) ?
 
-				var ts = antiCacheValue++,
-					// try replacing _= if it is there
-					ret = s.url.replace( rts, "$1_=" + ts );
+					// If there is already a '_' parameter, set its value
+					ifModifiedKey.replace( rts, "$1_=" + ajax_nonce++ ) :
 
-				// if nothing was replaced, add timestamp to the end
-				s.url = ret + ( ( ret === s.url ) ? ( rquery.test( s.url ) ? "&" : "?" ) + "_=" + ts : "" );
+					// Otherwise add one to the end
+					ifModifiedKey + ( ajax_rquery.test( ifModifiedKey ) ? "&" : "?" ) + "_=" + ajax_nonce++;
 			}
 		}
 
-		// Set the correct header, if data is being sent
-		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
-			jqXHR.setRequestHeader( "Content-Type", s.contentType );
-		}
-
 		// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
 		if ( s.ifModified ) {
 			ifModifiedKey = ifModifiedKey || s.url;
@@ -645,6 +507,11 @@ jQuery.extend({
 			}
 		}
 
+		// Set the correct header, if data is being sent
+		if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+			jqXHR.setRequestHeader( "Content-Type", s.contentType );
+		}
+
 		// Set the Accepts header for the server, depending on the dataType
 		jqXHR.setRequestHeader(
 			"Accept",
@@ -681,21 +548,22 @@ jQuery.extend({
 			done( -1, "No Transport" );
 		} else {
 			jqXHR.readyState = 1;
+
 			// Send global event
 			if ( fireGlobals ) {
 				globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
 			}
 			// Timeout
 			if ( s.async && s.timeout > 0 ) {
-				timeoutTimer = setTimeout( function(){
-					jqXHR.abort( "timeout" );
+				timeoutTimer = setTimeout(function() {
+					jqXHR.abort("timeout");
 				}, s.timeout );
 			}
 
 			try {
 				state = 1;
 				transport.send( requestHeaders, done );
-			} catch (e) {
+			} catch ( e ) {
 				// Propagate exception as error if not done
 				if ( state < 2 ) {
 					done( -1, e );
@@ -706,16 +574,121 @@ jQuery.extend({
 			}
 		}
 
+		// Callback for when everything is done
+		function done( status, nativeStatusText, responses, headers ) {
+			var isSuccess, success, error, response, modified,
+				statusText = nativeStatusText;
+
+			// Called once
+			if ( state === 2 ) {
+				return;
+			}
+
+			// State is "done" now
+			state = 2;
+
+			// Clear timeout if it exists
+			if ( timeoutTimer ) {
+				clearTimeout( timeoutTimer );
+			}
+
+			// 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 > 0 ? 4 : 0;
+
+			// Get response data
+			if ( responses ) {
+				response = ajaxHandleResponses( s, jqXHR, responses );
+			}
+
+			// If successful, handle type chaining
+			if ( status >= 200 && status < 300 || status === 304 ) {
+
+				// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+				if ( s.ifModified ) {
+					modified = jqXHR.getResponseHeader("Last-Modified");
+					if ( modified ) {
+						jQuery.lastModified[ ifModifiedKey ] = modified;
+					}
+					modified = jqXHR.getResponseHeader("etag");
+					if ( modified ) {
+						jQuery.etag[ ifModifiedKey ] = modified;
+					}
+				}
+
+				// If not modified
+				if ( status === 304 ) {
+					isSuccess = true;
+					statusText = "notmodified";
+
+				// If we have data
+				} else {
+					isSuccess = ajaxConvert( s, response );
+					statusText = isSuccess.state;
+					success = isSuccess.data;
+					error = isSuccess.error;
+					isSuccess = !error;
+				}
+			} else {
+				// We extract error from statusText
+				// then normalize statusText and status for non-aborts
+				error = statusText;
+				if ( status || !statusText ) {
+					statusText = "error";
+					if ( status < 0 ) {
+						status = 0;
+					}
+				}
+			}
+
+			// Set data for the fake xhr object
+			jqXHR.status = status;
+			jqXHR.statusText = ( nativeStatusText || statusText ) + "";
+
+			// Success/Error
+			if ( isSuccess ) {
+				deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
+			} else {
+				deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
+			}
+
+			// Status-dependent callbacks
+			jqXHR.statusCode( statusCode );
+			statusCode = undefined;
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
+					[ jqXHR, s, isSuccess ? success : error ] );
+			}
+
+			// Complete
+			completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
+
+			if ( fireGlobals ) {
+				globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
+				// Handle the global AJAX counter
+				if ( !( --jQuery.active ) ) {
+					jQuery.event.trigger("ajaxStop");
+				}
+			}
+		}
+
 		return jqXHR;
 	},
 
-	// Counter for holding the number of active queries
-	active: 0,
-
-	// Last-Modified header cache for next request
-	lastModified: {},
-	etag: {}
+	getScript: function( url, callback ) {
+		return jQuery.get( url, undefined, callback, "script" );
+	},
 
+	getJSON: function( url, data, callback ) {
+		return jQuery.get( url, data, callback, "json" );
+	}
 });
 
 /* Handles responses to an ajax request:
@@ -741,7 +714,7 @@ function ajaxHandleResponses( s, jqXHR, responses ) {
 	while( dataTypes[ 0 ] === "*" ) {
 		dataTypes.shift();
 		if ( ct === undefined ) {
-			ct = s.mimeType || jqXHR.getResponseHeader( "content-type" );
+			ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
 		}
 	}
 
@@ -788,11 +761,11 @@ function ajaxHandleResponses( s, jqXHR, responses ) {
 function ajaxConvert( s, response ) {
 
 	var conv, conv2, current, tmp,
+		converters = {},
+		i = 0,
 		// Work with a copy of dataTypes in case we need to modify it for conversion
 		dataTypes = s.dataTypes.slice(),
-		prev = dataTypes[ 0 ],
-		converters = {},
-		i = 0;
+		prev = dataTypes[ 0 ];
 
 	// Apply the dataFilter if provided
 	if ( s.dataFilter ) {