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jquery.ie.cors.js

Copyright 2013 Allen Institute for Brain Science Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

 

      		
    

    

      
        

          
        

        
Internet Explorer 8 implements cross-origin resource sharing using the 
non-standard XDomainRequest.  This function checks to see if XDomainRequest
exists (if you are using IE >= 8), and if so registers a cross-domain request
handler that uses it.


      		
      
        
(function( jQuery ) {
  if ( window.XDomainRequest ) {
    jQuery.ajaxTransport(function( s ) {
      if ( s.crossDomain && s.async ) {
        if ( s.timeout ) {
          s.xdrTimeout = s.timeout;
          delete s.timeout;
        }
        var xdr;
        return {
          send: function( _, complete ) {
            function callback( status, statusText, responses, responseHeaders ) {
              xdr.onload = xdr.onerror = xdr.ontimeout = jQuery.noop;
              xdr = undefined;
              complete( status, statusText, responses, responseHeaders );
            }
            xdr = new window.XDomainRequest();
            xdr.onload = function() {
              callback( 200, "OK", { text: xdr.responseText }, "Content-Type: " + xdr.contentType );
            };
            xdr.onerror = function() {
              callback( 404, "Not Found" );
            };
            xdr.onprogress = function() {}; 
            if ( s.xdrTimeout ) {
              xdr.ontimeout = function() {
                callback( 0, "timeout" );
              };
              xdr.timeout = s.xdrTimeout;
            }

            xdr.open( s.type, s.url, true );
            xdr.send( ( s.hasContent && s.data ) || null );
          },
          abort: function() {
            if ( xdr ) {
              xdr.onerror = jQuery.noop();
              xdr.abort();
            }
          }
        };
      }
    });
  }
})( jQuery );