src/ajax/jsonp.js

   1 (function( jQuery ) {
   2
   3 var jsc = jQuery.now(),
   4         jsre = /(\=)\?(&|$)|()\?\?()/i;
   5
   6 // Default jsonp settings
   7 jQuery.ajaxSetup({
   8         jsonp: "callback",
   9         jsonpCallback: function() {
  10                 return jQuery.expando + "_" + ( jsc++ );
  11         }
  12 });
  13
  14 // Detect, normalize options and install callbacks for jsonp requests
  15 jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
  16
  17         var dataIsString = ( typeof s.data === "string" );
  18
  19         if ( s.dataTypes[ 0 ] === "jsonp" ||
  20                 originalSettings.jsonpCallback ||
  21                 originalSettings.jsonp != null ||
  22                 s.jsonp !== false && ( jsre.test( s.url ) ||
  23                                 dataIsString && jsre.test( s.data ) ) ) {
  24
  25                 var responseContainer,
  26                         jsonpCallback = s.jsonpCallback =
  27                                 jQuery.isFunction( s.jsonpCallback ) ? s.jsonpCallback() : s.jsonpCallback,
  28                         previous = window[ jsonpCallback ],
  29                         url = s.url,
  30                         data = s.data,
  31                         replace = "$1" + jsonpCallback + "$2",
  32                         cleanUp = function() {
  33                                 // Set callback back to previous value
  34                                 window[ jsonpCallback ] = previous;
  35                                 // Call if it was a function and we have a response
  36                                 if ( responseContainer && jQuery.isFunction( previous ) ) {
  37                                         window[ jsonpCallback ]( responseContainer[ 0 ] );
  38                                 }
  39                         };
  40
  41                 if ( s.jsonp !== false ) {
  42                         url = url.replace( jsre, replace );
  43                         if ( s.url === url ) {
  44                                 if ( dataIsString ) {
  45                                         data = data.replace( jsre, replace );
  46                                 }
  47                                 if ( s.data === data ) {
  48                                         // Add callback manually
  49                                         url += (/\?/.test( url ) ? "&" : "?") + s.jsonp + "=" + jsonpCallback;
  50                                 }
  51                         }
  52                 }
  53
  54                 s.url = url;
  55                 s.data = data;
  56
  57                 // Install callback
  58                 window[ jsonpCallback ] = function( response ) {
  59                         responseContainer = [ response ];
  60                 };
  61
  62                 // Install cleanUp function
  63                 jqXHR.then( cleanUp, cleanUp );
  64
  65                 // Use data converter to retrieve json after script execution
  66                 s.converters["script json"] = function() {
  67                         if ( !responseContainer ) {
  68                                 jQuery.error( jsonpCallback + " was not called" );
  69                         }
  70                         return responseContainer[ 0 ];
  71                 };
  72
  73                 // force json dataType
  74                 s.dataTypes[ 0 ] = "json";
  75
  76                 // Delegate to script
  77                 return "script";
  78         }
  79 } );
  80
  81 })( jQuery );