+
+ // Apply prefilters
+ jQuery.ajaxPrefilter( s , options );
+
+ // 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 ( s.global && 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;
+ }
+
+ // Add anti-cache in url if needed
+ if ( s.cache === false ) {
+
+ var ts = jQuery.now(),
+ // try replacing _= if it is there
+ ret = s.url.replace( rts , "$1_=" + ts );
+
+ // if nothing was replaced, add timestamp to the end
+ s.url = ret + ( (ret == s.url ) ? ( rquery.test( s.url ) ? "&" : "?" ) + "_=" + ts : "");
+ }
+ }
+
+ // Set the correct header, if data is being sent
+ if ( s.data && s.hasContent && s.contentType !== false || options.contentType ) {
+ requestHeaders[ "content-type" ] = s.contentType;
+ }
+
+ // Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
+ if ( s.ifModified ) {
+ if ( jQuery_lastModified[ s.url ] ) {
+ requestHeaders[ "if-modified-since" ] = jQuery_lastModified[ s.url ];
+ }
+ if ( jQuery_etag[ s.url ] ) {
+ requestHeaders[ "if-none-match" ] = jQuery_etag[ s.url ];
+ }
+ }
+
+ // Set the Accepts header for the server, depending on the dataType
+ requestHeaders.accept = s.dataTypes[ 0 ] && s.accepts[ s.dataTypes[ 0 ] ] ?
+ s.accepts[ s.dataTypes[ 0 ] ] + ( s.dataTypes[ 0 ] !== "*" ? ", */*; q=0.01" : "" ) :
+ s.accepts[ "*" ];
+
+ // Check for headers option
+ for ( i in s.headers ) {
+ requestHeaders[ i.toLowerCase() ] = s.headers[ i ];
+ }
+
+ // Allow custom headers/mimetypes and early abort
+ if ( s.beforeSend && ( s.beforeSend.call( callbackContext , jXHR , s ) === false || state === 2 ) ) {
+
+ // Abort if not done already
+ done( 0 , "abort" );
+
+ // Return false
+ jXHR = false;
+
+ } else {
+
+ // Install callbacks on deferreds
+ for ( i in { success:1, error:1, complete:1 } ) {
+ jXHR[ i ]( s[ i ] );
+ }
+
+ // Get transport
+ transport = jQuery.ajaxTransport( s );
+
+ // If no transport, we auto-abort
+ if ( ! transport ) {
+
+ done( 0 , "notransport" );
+
+ } else {
+
+ // Set state as sending
+ state = jXHR.readyState = 1;
+
+ // Send global event
+ if ( s.global ) {
+ globalEventContext.trigger( "ajaxSend" , [ jXHR , s ] );
+ }
+
+ // Timeout
+ if ( s.async && s.timeout > 0 ) {
+ timeoutTimer = setTimeout(function(){
+ jXHR.abort( "timeout" );
+ }, s.timeout);
+ }
+
+ // Try to send
+ try {
+ transport.send(requestHeaders, done);
+ } catch (e) {
+ // Propagate exception as error if not done
+ if ( status === 1 ) {
+
+ done(0, "error", "" + e);
+ jXHR = false;
+
+ // Simply rethrow otherwise
+ } else {
+ jQuery.error(e);
+ }
+ }
+ }
+ }
+
+ return jXHR;