src/transports/script.js

   1 (function( jQuery ) {
   2
   3 // Install text to script executor
   4 jQuery.extend( true, jQuery.ajaxSettings , {
   5
   6         accepts: {
   7                 script: "text/javascript, application/javascript"
   8         },
   9
  10         autoDataType: {
  11                 script: /javascript/
  12         },
  13
  14         dataConverters: {
  15                 "text script": jQuery.globalEval
  16         }
  17 } );
  18
  19 // Bind script tag hack transport
  20 jQuery.xhr.transport("script", function(s) {
  21
  22         // Handle cache special case
  23         if ( s.cache === undefined ) {
  24                 s.cache = false;
  25         }
  26
  27         // This transport only deals with cross domain get requests
  28         if ( s.crossDomain && s.async && ( s.type === "GET" || ! s.data ) ) {
  29
  30                 s.global = false;
  31
  32                 var script,
  33                         head = document.getElementsByTagName("head")[0] || document.documentElement;
  34
  35                 return {
  36
  37                         send: function(_, callback) {
  38
  39                                 script = document.createElement("script");
  40
  41                                 script.async = "async";
  42
  43                                 if ( s.scriptCharset ) {
  44                                         script.charset = s.scriptCharset;
  45                                 }
  46
  47                                 script.src = s.url;
  48
  49                                 // Attach handlers for all browsers
  50                                 script.onload = script.onreadystatechange = function( _ , statusText) {
  51
  52                                         if ( ! script.readyState || /loaded|complete/.test( script.readyState ) ) {
  53
  54                                                 // Handle memory leak in IE
  55                                                 script.onload = script.onreadystatechange = null;
  56
  57                                                 // Remove the script
  58                                                 if ( head && script.parentNode ) {
  59                                                         head.removeChild( script );
  60                                                 }
  61
  62                                                 script = 0;
  63
  64                                                 // Callback
  65                                                 callback( statusText ? 0 : 200, statusText || "success" );
  66                                         }
  67                                 };
  68                                 // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
  69                                 // This arises when a base node is used (#2709 and #4378).
  70                                 head.insertBefore( script, head.firstChild );
  71                         },
  72
  73                         abort: function(statusText) {
  74                                 if ( script ) {
  75                                         script.onload( 0 , statusText );
  76                                 }
  77                         }
  78                 };
  79         }
  80 });
  81
  82 })( jQuery );