src/ajax.js

   1 define([
   2         "./core",
   3         "./var/rnotwhite",
   4         "./ajax/var/nonce",
   5         "./ajax/var/rquery",
   6         "./core/init",
   7         "./ajax/parseJSON",
   8         "./ajax/parseXML",
   9         "./deferred"
  10 ], function( jQuery, rnotwhite, nonce, rquery ) {
  11
  12 var
  13         rhash = /#.*$/,
  14         rts = /([?&])_=[^&]*/,
  15         rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
  16         // #7653, #8125, #8152: local protocol detection
  17         rlocalProtocol = /^(?:about|app|app-storage|.+-extension|file|res|widget):$/,
  18         rnoContent = /^(?:GET|HEAD)$/,
  19         rprotocol = /^\/\//,
  20
  21         /* Prefilters
  22          * 1) They are useful to introduce custom dataTypes (see ajax/jsonp.js for an example)
  23          * 2) These are called:
  24          *    - BEFORE asking for a transport
  25          *    - AFTER param serialization (s.data is a string if s.processData is true)
  26          * 3) key is the dataType
  27          * 4) the catchall symbol "*" can be used
  28          * 5) execution will start with transport dataType and THEN continue down to "*" if needed
  29          */
  30         prefilters = {},
  31
  32         /* Transports bindings
  33          * 1) key is the dataType
  34          * 2) the catchall symbol "*" can be used
  35          * 3) selection will start with transport dataType and THEN go to "*" if needed
  36          */
  37         transports = {},
  38
  39         // Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
  40         allTypes = "*/".concat( "*" ),
  41
  42         // Anchor tag for parsing the document origin
  43         originAnchor = document.createElement( "a" );
  44
  45         originAnchor.href = location.href;
  46
  47 // Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
  48 function addToPrefiltersOrTransports( structure ) {
  49
  50         // dataTypeExpression is optional and defaults to "*"
  51         return function( dataTypeExpression, func ) {
  52
  53                 if ( typeof dataTypeExpression !== "string" ) {
  54                         func = dataTypeExpression;
  55                         dataTypeExpression = "*";
  56                 }
  57
  58                 var dataType,
  59                         i = 0,
  60                         dataTypes = dataTypeExpression.toLowerCase().match( rnotwhite ) || [];
  61
  62                 if ( jQuery.isFunction( func ) ) {
  63                         // For each dataType in the dataTypeExpression
  64                         while ( (dataType = dataTypes[i++]) ) {
  65                                 // Prepend if requested
  66                                 if ( dataType[ 0 ] === "+" ) {
  67                                         dataType = dataType.slice( 1 ) || "*";
  68                                         (structure[ dataType ] = structure[ dataType ] || []).unshift( func );
  69
  70                                 // Otherwise append
  71                                 } else {
  72                                         (structure[ dataType ] = structure[ dataType ] || []).push( func );
  73                                 }
  74                         }
  75                 }
  76         };
  77 }
  78
  79 // Base inspection function for prefilters and transports
  80 function inspectPrefiltersOrTransports( structure, options, originalOptions, jqXHR ) {
  81
  82         var inspected = {},
  83                 seekingTransport = ( structure === transports );
  84
  85         function inspect( dataType ) {
  86                 var selected;
  87                 inspected[ dataType ] = true;
  88                 jQuery.each( structure[ dataType ] || [], function( _, prefilterOrFactory ) {
  89                         var dataTypeOrTransport = prefilterOrFactory( options, originalOptions, jqXHR );
  90                         if ( typeof dataTypeOrTransport === "string" &&
  91                                 !seekingTransport && !inspected[ dataTypeOrTransport ] ) {
  92
  93                                 options.dataTypes.unshift( dataTypeOrTransport );
  94                                 inspect( dataTypeOrTransport );
  95                                 return false;
  96                         } else if ( seekingTransport ) {
  97                                 return !( selected = dataTypeOrTransport );
  98                         }
  99                 });
 100                 return selected;
 101         }
 102
 103         return inspect( options.dataTypes[ 0 ] ) || !inspected[ "*" ] && inspect( "*" );
 104 }
 105
 106 // A special extend for ajax options
 107 // that takes "flat" options (not to be deep extended)
 108 // Fixes #9887
 109 function ajaxExtend( target, src ) {
 110         var deep, key,
 111                 flatOptions = jQuery.ajaxSettings.flatOptions || {};
 112
 113         for ( key in src ) {
 114                 if ( src[ key ] !== undefined ) {
 115                         ( flatOptions[ key ] ? target : ( deep || (deep = {}) ) )[ key ] = src[ key ];
 116                 }
 117         }
 118         if ( deep ) {
 119                 jQuery.extend( true, target, deep );
 120         }
 121
 122         return target;
 123 }
 124
 125 /* Handles responses to an ajax request:
 126  * - finds the right dataType (mediates between content-type and expected dataType)
 127  * - returns the corresponding response
 128  */
 129 function ajaxHandleResponses( s, jqXHR, responses ) {
 130         var firstDataType, ct, finalDataType, type,
 131                 contents = s.contents,
 132                 dataTypes = s.dataTypes;
 133
 134         // Remove auto dataType and get content-type in the process
 135         while ( dataTypes[ 0 ] === "*" ) {
 136                 dataTypes.shift();
 137                 if ( ct === undefined ) {
 138                         ct = s.mimeType || jqXHR.getResponseHeader("Content-Type");
 139                 }
 140         }
 141
 142         // Check if we're dealing with a known content-type
 143         if ( ct ) {
 144                 for ( type in contents ) {
 145                         if ( contents[ type ] && contents[ type ].test( ct ) ) {
 146                                 dataTypes.unshift( type );
 147                                 break;
 148                         }
 149                 }
 150         }
 151
 152         // Check to see if we have a response for the expected dataType
 153         if ( dataTypes[ 0 ] in responses ) {
 154                 finalDataType = dataTypes[ 0 ];
 155         } else {
 156                 // Try convertible dataTypes
 157                 for ( type in responses ) {
 158                         if ( !dataTypes[ 0 ] || s.converters[ type + " " + dataTypes[0] ] ) {
 159                                 finalDataType = type;
 160                                 break;
 161                         }
 162                         if ( !firstDataType ) {
 163                                 firstDataType = type;
 164                         }
 165                 }
 166                 // Or just use first one
 167                 finalDataType = finalDataType || firstDataType;
 168         }
 169
 170         // If we found a dataType
 171         // We add the dataType to the list if needed
 172         // and return the corresponding response
 173         if ( finalDataType ) {
 174                 if ( finalDataType !== dataTypes[ 0 ] ) {
 175                         dataTypes.unshift( finalDataType );
 176                 }
 177                 return responses[ finalDataType ];
 178         }
 179 }
 180
 181 /* Chain conversions given the request and the original response
 182  * Also sets the responseXXX fields on the jqXHR instance
 183  */
 184 function ajaxConvert( s, response, jqXHR, isSuccess ) {
 185         var conv2, current, conv, tmp, prev,
 186                 converters = {},
 187                 // Work with a copy of dataTypes in case we need to modify it for conversion
 188                 dataTypes = s.dataTypes.slice();
 189
 190         // Create converters map with lowercased keys
 191         if ( dataTypes[ 1 ] ) {
 192                 for ( conv in s.converters ) {
 193                         converters[ conv.toLowerCase() ] = s.converters[ conv ];
 194                 }
 195         }
 196
 197         current = dataTypes.shift();
 198
 199         // Convert to each sequential dataType
 200         while ( current ) {
 201
 202                 if ( s.responseFields[ current ] ) {
 203                         jqXHR[ s.responseFields[ current ] ] = response;
 204                 }
 205
 206                 // Apply the dataFilter if provided
 207                 if ( !prev && isSuccess && s.dataFilter ) {
 208                         response = s.dataFilter( response, s.dataType );
 209                 }
 210
 211                 prev = current;
 212                 current = dataTypes.shift();
 213
 214                 if ( current ) {
 215
 216                         // There's only work to do if current dataType is non-auto
 217                         if ( current === "*" ) {
 218
 219                                 current = prev;
 220
 221                         // Convert response if prev dataType is non-auto and differs from current
 222                         } else if ( prev !== "*" && prev !== current ) {
 223
 224                                 // Seek a direct converter
 225                                 conv = converters[ prev + " " + current ] || converters[ "* " + current ];
 226
 227                                 // If none found, seek a pair
 228                                 if ( !conv ) {
 229                                         for ( conv2 in converters ) {
 230
 231                                                 // If conv2 outputs current
 232                                                 tmp = conv2.split( " " );
 233                                                 if ( tmp[ 1 ] === current ) {
 234
 235                                                         // If prev can be converted to accepted input
 236                                                         conv = converters[ prev + " " + tmp[ 0 ] ] ||
 237                                                                 converters[ "* " + tmp[ 0 ] ];
 238                                                         if ( conv ) {
 239                                                                 // Condense equivalence converters
 240                                                                 if ( conv === true ) {
 241                                                                         conv = converters[ conv2 ];
 242
 243                                                                 // Otherwise, insert the intermediate dataType
 244                                                                 } else if ( converters[ conv2 ] !== true ) {
 245                                                                         current = tmp[ 0 ];
 246                                                                         dataTypes.unshift( tmp[ 1 ] );
 247                                                                 }
 248                                                                 break;
 249                                                         }
 250                                                 }
 251                                         }
 252                                 }
 253
 254                                 // Apply converter (if not an equivalence)
 255                                 if ( conv !== true ) {
 256
 257                                         // Unless errors are allowed to bubble, catch and return them
 258                                         if ( conv && s[ "throws" ] ) {
 259                                                 response = conv( response );
 260                                         } else {
 261                                                 try {
 262                                                         response = conv( response );
 263                                                 } catch ( e ) {
 264                                                         return {
 265                                                                 state: "parsererror",
 266                                                                 error: conv ? e : "No conversion from " + prev + " to " + current
 267                                                         };
 268                                                 }
 269                                         }
 270                                 }
 271                         }
 272                 }
 273         }
 274
 275         return { state: "success", data: response };
 276 }
 277
 278 jQuery.extend({
 279
 280         // Counter for holding the number of active queries
 281         active: 0,
 282
 283         // Last-Modified header cache for next request
 284         lastModified: {},
 285         etag: {},
 286
 287         ajaxSettings: {
 288                 url: location.href,
 289                 type: "GET",
 290                 isLocal: rlocalProtocol.test( location.protocol ),
 291                 global: true,
 292                 processData: true,
 293                 async: true,
 294                 contentType: "application/x-www-form-urlencoded; charset=UTF-8",
 295                 /*
 296                 timeout: 0,
 297                 data: null,
 298                 dataType: null,
 299                 username: null,
 300                 password: null,
 301                 cache: null,
 302                 throws: false,
 303                 traditional: false,
 304                 headers: {},
 305                 */
 306
 307                 accepts: {
 308                         "*": allTypes,
 309                         text: "text/plain",
 310                         html: "text/html",
 311                         xml: "application/xml, text/xml",
 312                         json: "application/json, text/javascript"
 313                 },
 314
 315                 contents: {
 316                         xml: /xml/,
 317                         html: /html/,
 318                         json: /json/
 319                 },
 320
 321                 responseFields: {
 322                         xml: "responseXML",
 323                         text: "responseText",
 324                         json: "responseJSON"
 325                 },
 326
 327                 // Data converters
 328                 // Keys separate source (or catchall "*") and destination types with a single space
 329                 converters: {
 330
 331                         // Convert anything to text
 332                         "* text": String,
 333
 334                         // Text to html (true = no transformation)
 335                         "text html": true,
 336
 337                         // Evaluate text as a json expression
 338                         "text json": jQuery.parseJSON,
 339
 340                         // Parse text as xml
 341                         "text xml": jQuery.parseXML
 342                 },
 343
 344                 // For options that shouldn't be deep extended:
 345                 // you can add your own custom options here if
 346                 // and when you create one that shouldn't be
 347                 // deep extended (see ajaxExtend)
 348                 flatOptions: {
 349                         url: true,
 350                         context: true
 351                 }
 352         },
 353
 354         // Creates a full fledged settings object into target
 355         // with both ajaxSettings and settings fields.
 356         // If target is omitted, writes into ajaxSettings.
 357         ajaxSetup: function( target, settings ) {
 358                 return settings ?
 359
 360                         // Building a settings object
 361                         ajaxExtend( ajaxExtend( target, jQuery.ajaxSettings ), settings ) :
 362
 363                         // Extending ajaxSettings
 364                         ajaxExtend( jQuery.ajaxSettings, target );
 365         },
 366
 367         ajaxPrefilter: addToPrefiltersOrTransports( prefilters ),
 368         ajaxTransport: addToPrefiltersOrTransports( transports ),
 369
 370         // Main method
 371         ajax: function( url, options ) {
 372
 373                 // If url is an object, simulate pre-1.5 signature
 374                 if ( typeof url === "object" ) {
 375                         options = url;
 376                         url = undefined;
 377                 }
 378
 379                 // Force options to be an object
 380                 options = options || {};
 381
 382                 var
 383                         // Loop variable
 384                         i,
 385                         // URL without anti-cache param
 386                         cacheURL,
 387                         // Response headers as string
 388                         responseHeadersString,
 389                         // timeout handle
 390                         timeoutTimer,
 391                         // Url cleanup var
 392                         urlAnchor,
 393                         // To know if global events are to be dispatched
 394                         fireGlobals,
 395
 396                         transport,
 397                         // Response headers
 398                         responseHeaders,
 399                         // Create the final options object
 400                         s = jQuery.ajaxSetup( {}, options ),
 401                         // Callbacks context
 402                         callbackContext = s.context || s,
 403                         // Context for global events is callbackContext if it is a DOM node or jQuery collection
 404                         globalEventContext = s.context &&
 405                                 ( callbackContext.nodeType || callbackContext.jquery ) ?
 406                                         jQuery( callbackContext ) :
 407                                         jQuery.event,
 408                         // Deferreds
 409                         deferred = jQuery.Deferred(),
 410                         completeDeferred = jQuery.Callbacks("once memory"),
 411                         // Status-dependent callbacks
 412                         statusCode = s.statusCode || {},
 413                         // Headers (they are sent all at once)
 414                         requestHeaders = {},
 415                         requestHeadersNames = {},
 416                         // The jqXHR state
 417                         state = 0,
 418                         // Default abort message
 419                         strAbort = "canceled",
 420                         // Fake xhr
 421                         jqXHR = {
 422                                 readyState: 0,
 423
 424                                 // Builds headers hashtable if needed
 425                                 getResponseHeader: function( key ) {
 426                                         var match;
 427                                         if ( state === 2 ) {
 428                                                 if ( !responseHeaders ) {
 429                                                         responseHeaders = {};
 430                                                         while ( (match = rheaders.exec( responseHeadersString )) ) {
 431                                                                 responseHeaders[ match[1].toLowerCase() ] = match[ 2 ];
 432                                                         }
 433                                                 }
 434                                                 match = responseHeaders[ key.toLowerCase() ];
 435                                         }
 436                                         return match == null ? null : match;
 437                                 },
 438
 439                                 // Raw string
 440                                 getAllResponseHeaders: function() {
 441                                         return state === 2 ? responseHeadersString : null;
 442                                 },
 443
 444                                 // Caches the header
 445                                 setRequestHeader: function( name, value ) {
 446                                         var lname = name.toLowerCase();
 447                                         if ( !state ) {
 448                                                 name = requestHeadersNames[ lname ] = requestHeadersNames[ lname ] || name;
 449                                                 requestHeaders[ name ] = value;
 450                                         }
 451                                         return this;
 452                                 },
 453
 454                                 // Overrides response content-type header
 455                                 overrideMimeType: function( type ) {
 456                                         if ( !state ) {
 457                                                 s.mimeType = type;
 458                                         }
 459                                         return this;
 460                                 },
 461
 462                                 // Status-dependent callbacks
 463                                 statusCode: function( map ) {
 464                                         var code;
 465                                         if ( map ) {
 466                                                 if ( state < 2 ) {
 467                                                         for ( code in map ) {
 468                                                                 // Lazy-add the new callback in a way that preserves old ones
 469                                                                 statusCode[ code ] = [ statusCode[ code ], map[ code ] ];
 470                                                         }
 471                                                 } else {
 472                                                         // Execute the appropriate callbacks
 473                                                         jqXHR.always( map[ jqXHR.status ] );
 474                                                 }
 475                                         }
 476                                         return this;
 477                                 },
 478
 479                                 // Cancel the request
 480                                 abort: function( statusText ) {
 481                                         var finalText = statusText || strAbort;
 482                                         if ( transport ) {
 483                                                 transport.abort( finalText );
 484                                         }
 485                                         done( 0, finalText );
 486                                         return this;
 487                                 }
 488                         };
 489
 490                 // Attach deferreds
 491                 deferred.promise( jqXHR );
 492
 493                 // Remove hash character (#7531: and string promotion)
 494                 // Add protocol if not provided (prefilters might expect it)
 495                 // Handle falsy url in the settings object (#10093: consistency with old signature)
 496                 // We also use the url parameter if available
 497                 s.url = ( ( url || s.url || location.href ) + "" ).replace( rhash, "" )
 498                         .replace( rprotocol, location.protocol + "//" );
 499
 500                 // Alias method option to type as per ticket #12004
 501                 s.type = options.method || options.type || s.method || s.type;
 502
 503                 // Extract dataTypes list
 504                 s.dataTypes = jQuery.trim( s.dataType || "*" ).toLowerCase().match( rnotwhite ) || [ "" ];
 505
 506                 // A cross-domain request is in order when the origin doesn't match the current origin
 507                 if ( s.crossDomain == null ) {
 508                         urlAnchor = document.createElement( "a" );
 509
 510                         // Support: IE8-11+
 511                         // IE throws exception if url is malformed, e.g. http://example.com:80x/
 512                         try {
 513                                 urlAnchor.href = s.url;
 514                                 // Support: IE8-11+
 515                                 // Anchor's host property isn't correctly set when s.url is relative
 516                                 urlAnchor.href = urlAnchor.href;
 517                                 s.crossDomain = originAnchor.protocol + "//" + originAnchor.host !==
 518                                         urlAnchor.protocol + "//" + urlAnchor.host;
 519                         } catch ( e ) {
 520                                 // If there is an error parsing the URL, assume it is crossDomain,
 521                                 // it can be rejected by the transport if it is invalid
 522                                 s.crossDomain = true;
 523                         }
 524                 }
 525
 526                 // Convert data if not already a string
 527                 if ( s.data && s.processData && typeof s.data !== "string" ) {
 528                         s.data = jQuery.param( s.data, s.traditional );
 529                 }
 530
 531                 // Apply prefilters
 532                 inspectPrefiltersOrTransports( prefilters, s, options, jqXHR );
 533
 534                 // If request was aborted inside a prefilter, stop there
 535                 if ( state === 2 ) {
 536                         return jqXHR;
 537                 }
 538
 539                 // We can fire global events as of now if asked to
 540                 // Don't fire events if jQuery.event is undefined in an AMD-usage scenario (#15118)
 541                 fireGlobals = jQuery.event && s.global;
 542
 543                 // Watch for a new set of requests
 544                 if ( fireGlobals && jQuery.active++ === 0 ) {
 545                         jQuery.event.trigger("ajaxStart");
 546                 }
 547
 548                 // Uppercase the type
 549                 s.type = s.type.toUpperCase();
 550
 551                 // Determine if request has content
 552                 s.hasContent = !rnoContent.test( s.type );
 553
 554                 // Save the URL in case we're toying with the If-Modified-Since
 555                 // and/or If-None-Match header later on
 556                 cacheURL = s.url;
 557
 558                 // More options handling for requests with no content
 559                 if ( !s.hasContent ) {
 560
 561                         // If data is available, append data to url
 562                         if ( s.data ) {
 563                                 cacheURL = ( s.url += ( rquery.test( cacheURL ) ? "&" : "?" ) + s.data );
 564                                 // #9682: remove data so that it's not used in an eventual retry
 565                                 delete s.data;
 566                         }
 567
 568                         // Add anti-cache in url if needed
 569                         if ( s.cache === false ) {
 570                                 s.url = rts.test( cacheURL ) ?
 571
 572                                         // If there is already a '_' parameter, set its value
 573                                         cacheURL.replace( rts, "$1_=" + nonce++ ) :
 574
 575                                         // Otherwise add one to the end
 576                                         cacheURL + ( rquery.test( cacheURL ) ? "&" : "?" ) + "_=" + nonce++;
 577                         }
 578                 }
 579
 580                 // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
 581                 if ( s.ifModified ) {
 582                         if ( jQuery.lastModified[ cacheURL ] ) {
 583                                 jqXHR.setRequestHeader( "If-Modified-Since", jQuery.lastModified[ cacheURL ] );
 584                         }
 585                         if ( jQuery.etag[ cacheURL ] ) {
 586                                 jqXHR.setRequestHeader( "If-None-Match", jQuery.etag[ cacheURL ] );
 587                         }
 588                 }
 589
 590                 // Set the correct header, if data is being sent
 591                 if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
 592                         jqXHR.setRequestHeader( "Content-Type", s.contentType );
 593                 }
 594
 595                 // Set the Accepts header for the server, depending on the dataType
 596                 jqXHR.setRequestHeader(
 597                         "Accept",
 598                         s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[0] ] ?
 599                                 s.accepts[ s.dataTypes[0] ] +
 600                                         ( s.dataTypes[ 0 ] !== "*" ? ", " + allTypes + "; q=0.01" : "" ) :
 601                                 s.accepts[ "*" ]
 602                 );
 603
 604                 // Check for headers option
 605                 for ( i in s.headers ) {
 606                         jqXHR.setRequestHeader( i, s.headers[ i ] );
 607                 }
 608
 609                 // Allow custom headers/mimetypes and early abort
 610                 if ( s.beforeSend &&
 611                         ( s.beforeSend.call( callbackContext, jqXHR, s ) === false || state === 2 ) ) {
 612
 613                         // Abort if not done already and return
 614                         return jqXHR.abort();
 615                 }
 616
 617                 // aborting is no longer a cancellation
 618                 strAbort = "abort";
 619
 620                 // Install callbacks on deferreds
 621                 completeDeferred.add( s.complete );
 622                 jqXHR.done( s.success );
 623                 jqXHR.fail( s.error );
 624
 625                 // Get transport
 626                 transport = inspectPrefiltersOrTransports( transports, s, options, jqXHR );
 627
 628                 // If no transport, we auto-abort
 629                 if ( !transport ) {
 630                         done( -1, "No Transport" );
 631                 } else {
 632                         jqXHR.readyState = 1;
 633
 634                         // Send global event
 635                         if ( fireGlobals ) {
 636                                 globalEventContext.trigger( "ajaxSend", [ jqXHR, s ] );
 637                         }
 638
 639                         // If request was aborted inside ajaxSend, stop there
 640                         if ( state === 2 ) {
 641                                 return jqXHR;
 642                         }
 643
 644                         // Timeout
 645                         if ( s.async && s.timeout > 0 ) {
 646                                 timeoutTimer = setTimeout(function() {
 647                                         jqXHR.abort("timeout");
 648                                 }, s.timeout );
 649                         }
 650
 651                         try {
 652                                 state = 1;
 653                                 transport.send( requestHeaders, done );
 654                         } catch ( e ) {
 655                                 // Propagate exception as error if not done
 656                                 if ( state < 2 ) {
 657                                         done( -1, e );
 658                                 // Simply rethrow otherwise
 659                                 } else {
 660                                         throw e;
 661                                 }
 662                         }
 663                 }
 664
 665                 // Callback for when everything is done
 666                 function done( status, nativeStatusText, responses, headers ) {
 667                         var isSuccess, success, error, response, modified,
 668                                 statusText = nativeStatusText;
 669
 670                         // Called once
 671                         if ( state === 2 ) {
 672                                 return;
 673                         }
 674
 675                         // State is "done" now
 676                         state = 2;
 677
 678                         // Clear timeout if it exists
 679                         if ( timeoutTimer ) {
 680                                 clearTimeout( timeoutTimer );
 681                         }
 682
 683                         // Dereference transport for early garbage collection
 684                         // (no matter how long the jqXHR object will be used)
 685                         transport = undefined;
 686
 687                         // Cache response headers
 688                         responseHeadersString = headers || "";
 689
 690                         // Set readyState
 691                         jqXHR.readyState = status > 0 ? 4 : 0;
 692
 693                         // Determine if successful
 694                         isSuccess = status >= 200 && status < 300 || status === 304;
 695
 696                         // Get response data
 697                         if ( responses ) {
 698                                 response = ajaxHandleResponses( s, jqXHR, responses );
 699                         }
 700
 701                         // Convert no matter what (that way responseXXX fields are always set)
 702                         response = ajaxConvert( s, response, jqXHR, isSuccess );
 703
 704                         // If successful, handle type chaining
 705                         if ( isSuccess ) {
 706
 707                                 // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
 708                                 if ( s.ifModified ) {
 709                                         modified = jqXHR.getResponseHeader("Last-Modified");
 710                                         if ( modified ) {
 711                                                 jQuery.lastModified[ cacheURL ] = modified;
 712                                         }
 713                                         modified = jqXHR.getResponseHeader("etag");
 714                                         if ( modified ) {
 715                                                 jQuery.etag[ cacheURL ] = modified;
 716                                         }
 717                                 }
 718
 719                                 // if no content
 720                                 if ( status === 204 || s.type === "HEAD" ) {
 721                                         statusText = "nocontent";
 722
 723                                 // if not modified
 724                                 } else if ( status === 304 ) {
 725                                         statusText = "notmodified";
 726
 727                                 // If we have data, let's convert it
 728                                 } else {
 729                                         statusText = response.state;
 730                                         success = response.data;
 731                                         error = response.error;
 732                                         isSuccess = !error;
 733                                 }
 734                         } else {
 735                                 // We extract error from statusText
 736                                 // then normalize statusText and status for non-aborts
 737                                 error = statusText;
 738                                 if ( status || !statusText ) {
 739                                         statusText = "error";
 740                                         if ( status < 0 ) {
 741                                                 status = 0;
 742                                         }
 743                                 }
 744                         }
 745
 746                         // Set data for the fake xhr object
 747                         jqXHR.status = status;
 748                         jqXHR.statusText = ( nativeStatusText || statusText ) + "";
 749
 750                         // Success/Error
 751                         if ( isSuccess ) {
 752                                 deferred.resolveWith( callbackContext, [ success, statusText, jqXHR ] );
 753                         } else {
 754                                 deferred.rejectWith( callbackContext, [ jqXHR, statusText, error ] );
 755                         }
 756
 757                         // Status-dependent callbacks
 758                         jqXHR.statusCode( statusCode );
 759                         statusCode = undefined;
 760
 761                         if ( fireGlobals ) {
 762                                 globalEventContext.trigger( isSuccess ? "ajaxSuccess" : "ajaxError",
 763                                         [ jqXHR, s, isSuccess ? success : error ] );
 764                         }
 765
 766                         // Complete
 767                         completeDeferred.fireWith( callbackContext, [ jqXHR, statusText ] );
 768
 769                         if ( fireGlobals ) {
 770                                 globalEventContext.trigger( "ajaxComplete", [ jqXHR, s ] );
 771                                 // Handle the global AJAX counter
 772                                 if ( !( --jQuery.active ) ) {
 773                                         jQuery.event.trigger("ajaxStop");
 774                                 }
 775                         }
 776                 }
 777
 778                 return jqXHR;
 779         },
 780
 781         getJSON: function( url, data, callback ) {
 782                 return jQuery.get( url, data, callback, "json" );
 783         },
 784
 785         getScript: function( url, callback ) {
 786                 return jQuery.get( url, undefined, callback, "script" );
 787         }
 788 });
 789
 790 jQuery.each( [ "get", "post" ], function( i, method ) {
 791         jQuery[ method ] = function( url, data, callback, type ) {
 792                 // shift arguments if data argument was omitted
 793                 if ( jQuery.isFunction( data ) ) {
 794                         type = type || callback;
 795                         callback = data;
 796                         data = undefined;
 797                 }
 798
 799                 // The url can be an options object (which then must have .url)
 800                 return jQuery.ajax( jQuery.extend({
 801                         url: url,
 802                         type: method,
 803                         dataType: type,
 804                         data: data,
 805                         success: callback
 806                 }, jQuery.isPlainObject( url ) && url ) );
 807         };
 808 });
 809
 810 return jQuery;
 811 });