- var jsonp, status, data,
- callbackContext = s.context || s,
- type = s.type.toUpperCase();
-
- // convert data if not already a string
- if ( s.data && s.processData && typeof s.data !== "string" ) {
- s.data = jQuery.param( s.data, s.traditional );
- }
-
- // Handle JSONP Parameter Callbacks
- if ( s.dataType === "jsonp" ) {
- if ( type === "GET" ) {
- if ( !jsre.test( s.url ) ) {
- s.url += (rquery.test( s.url ) ? "&" : "?") + (s.jsonp || "callback") + "=?";
- }
- } else if ( !s.data || !jsre.test(s.data) ) {
- s.data = (s.data ? s.data + "&" : "") + (s.jsonp || "callback") + "=?";
- }
- s.dataType = "json";
- }
-
- // Build temporary JSONP function
- if ( s.dataType === "json" && (s.data && jsre.test(s.data) || jsre.test(s.url)) ) {
- jsonp = s.jsonpCallback || ("jsonp" + jsc++);
-
- // Replace the =? sequence both in the query string and the data
- if ( s.data ) {
- s.data = (s.data + "").replace(jsre, "=" + jsonp + "$1");
- }
-
- s.url = s.url.replace(jsre, "=" + jsonp + "$1");
-
- // We need to make sure
- // that a JSONP style response is executed properly
- s.dataType = "script";
-
- // Handle JSONP-style loading
- window[ jsonp ] = window[ jsonp ] || function( tmp ) {
- data = tmp;
- success();
- complete();
- // Garbage collect
- window[ jsonp ] = undefined;
-
- try {
- delete window[ jsonp ];
- } catch(e) {}
-
- if ( head ) {
- head.removeChild( script );
- }
- };
- }
-
- if ( s.dataType === "script" && s.cache === null ) {
- s.cache = false;
- }
-
- if ( s.cache === false && type === "GET" ) {
- var ts = now();
-
- // try replacing _= if it is there
- var ret = s.url.replace(rts, "$1_=" + ts + "$2");
-
- // if nothing was replaced, add timestamp to the end
- s.url = ret + ((ret === s.url) ? (rquery.test(s.url) ? "&" : "?") + "_=" + ts : "");
- }
-
- // If data is available, append data to url for get requests
- if ( s.data && type === "GET" ) {
- s.url += (rquery.test(s.url) ? "&" : "?") + s.data;
- }
-
- // Watch for a new set of requests
- if ( s.global && ! jQuery.active++ ) {
- jQuery.event.trigger( "ajaxStart" );
- }
-
- // Matches an absolute URL, and saves the domain
- var parts = rurl.exec( s.url ),
- remote = parts && (parts[1] && parts[1] !== location.protocol || parts[2] !== location.host);
-
- // If we're requesting a remote document
- // and trying to load JSON or Script with a GET
- if ( s.dataType === "script" && type === "GET" && remote ) {
- var head = document.getElementsByTagName("head")[0] || document.documentElement;
- var script = document.createElement("script");
- script.src = s.url;
- if ( s.scriptCharset ) {
- script.charset = s.scriptCharset;
- }
-
- // Handle Script loading
- if ( !jsonp ) {
- var done = false;
-
- // Attach handlers for all browsers
- script.onload = script.onreadystatechange = function() {
- if ( !done && (!this.readyState ||
- this.readyState === "loaded" || this.readyState === "complete") ) {
- done = true;
- success();
- complete();
-
- // Handle memory leak in IE
- script.onload = script.onreadystatechange = null;
- if ( head && script.parentNode ) {
- head.removeChild( script );
- }
- }
- };
- }
-
- // Use insertBefore instead of appendChild to circumvent an IE6 bug.
- // This arises when a base node is used (#2709 and #4378).
- head.insertBefore( script, head.firstChild );
-
- // We handle everything using the script element injection
- return undefined;
- }
-
- var requestDone = false;
-
- // Create the request object
- var xhr = s.xhr();
-
- // Open the socket
- // Passing null username, generates a login popup on Opera (#2865)
- if ( s.username ) {
- xhr.open(type, s.url, s.async, s.username, s.password);
- } else {
- xhr.open(type, s.url, s.async);
- }
-
- // Need an extra try/catch for cross domain requests in Firefox 3
- try {
- // Set the correct header, if data is being sent
- if ( s.data || origSettings && origSettings.contentType ) {
- xhr.setRequestHeader("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] ) {
- xhr.setRequestHeader("If-Modified-Since", jQuery.lastModified[s.url]);
- }
-
- if ( jQuery.etag[s.url] ) {
- xhr.setRequestHeader("If-None-Match", jQuery.etag[s.url]);
- }
- }
-
- // Set header so the called script knows that it's an XMLHttpRequest
- // Only send the header if it's not a remote XHR
- if ( !remote ) {
- xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
- }
-
- // Set the Accepts header for the server, depending on the dataType
- xhr.setRequestHeader("Accept", s.dataType && s.accepts[ s.dataType ] ?
- s.accepts[ s.dataType ] + ", */*" :
- s.accepts._default );
- } catch(e) {}
-
- // Allow custom headers/mimetypes and early abort
- if ( s.beforeSend && s.beforeSend.call(callbackContext, xhr, s) === false ) {
- // Handle the global AJAX counter
- if ( s.global && ! --jQuery.active ) {
- jQuery.event.trigger( "ajaxStop" );
- }
-
- // close opended socket
- xhr.abort();
- return false;
- }
-
- if ( s.global ) {
- trigger("ajaxSend", [xhr, s]);
- }
-
- // Wait for a response to come back
- var onreadystatechange = xhr.onreadystatechange = function( isTimeout ) {
- // The request was aborted, clear the interval and decrement jQuery.active
- if ( !xhr || xhr.readyState === 0 ) {
- requestDone = true;
- xhr.onreadystatechange = function(){};
-
- // Handle the global AJAX counter
- if ( s.global && ! --jQuery.active ) {
- jQuery.event.trigger( "ajaxStop" );
- }
-
- // The transfer is complete and the data is available, or the request timed out
- } else if ( !requestDone && xhr && (xhr.readyState === 4 || isTimeout === "timeout") ) {
- requestDone = true;
- xhr.onreadystatechange = function(){};
-
- status = isTimeout === "timeout" ?
- "timeout" :
- !jQuery.httpSuccess( xhr ) ?
- "error" :
- s.ifModified && jQuery.httpNotModified( xhr, s.url ) ?
- "notmodified" :
- "success";
-
- if ( status === "success" ) {
- // Watch for, and catch, XML document parse errors
- try {
- // process the data (runs the xml through httpData regardless of callback)
- data = jQuery.httpData( xhr, s.dataType, s );
- } catch(e) {
- status = "parsererror";
- }
- }
-
- // Make sure that the request was successful or notmodified
- if ( status === "success" || status === "notmodified" ) {
- // JSONP handles its own success callback
- if ( !jsonp ) {
- success();
- }
- } else {
- jQuery.handleError(s, xhr, status);