traditional: false,
*/
// Create the request object; Microsoft failed to properly
- // implement the XMLHttpRequest in IE7, so we use the ActiveXObject when it is available
+ // implement the XMLHttpRequest in IE7 (can't request local files),
+ // so we use the ActiveXObject when it is available
// This function can be overriden by calling jQuery.ajaxSetup
xhr: function() {
- return window.ActiveXObject ?
- new ActiveXObject("Microsoft.XMLHTTP") :
- new XMLHttpRequest();
+ if ( window.XMLHttpRequest && (window.location.protocol !== "file:" || !window.ActiveXObject) ) {
+ return new window.XMLHttpRequest();
+
+ } else {
+ try {
+ return new window.ActiveXObject("Microsoft.XMLHTTP");
+ } catch(e) {}
+ }
},
accepts: {
xml: "application/xml, text/xml",
// Create the request object
var xhr = s.xhr();
+ if ( !xhr ) {
+ return;
+ }
+
// Open the socket
// Passing null username, generates a login popup on Opera (#2865)
if ( s.username ) {
}
// Wait for a response to come back
- var onreadystatechange = function( isTimeout ) {
+ var onreadystatechange = xhr.onreadystatechange = function( isTimeout ) {
// The request was aborted, clear the interval and decrement jQuery.active
if ( !xhr || xhr.readyState === 0 ) {
- if ( ival ) {
- // clear poll interval
- clearInterval( ival );
- ival = null;
-
- // Handle the global AJAX counter
- if ( s.global && ! --jQuery.active ) {
- jQuery.event.trigger( "ajaxStop" );
- }
+ requestDone = true;
+ xhr.onreadystatechange = jQuery.noop;
+
+ // 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;
-
- // clear poll interval
- if (ival) {
- clearInterval(ival);
- ival = null;
- }
+ xhr.onreadystatechange = jQuery.noop;
status = isTimeout === "timeout" ?
"timeout" :
}
};
- if ( s.async ) {
- // don't attach the handler to the request, just poll it instead
- var ival = setInterval(onreadystatechange, 13);
-
- // Timeout checker
- if ( s.timeout > 0 ) {
- setTimeout(function() {
- // Check to see if the request is still happening
- if ( xhr && !requestDone ) {
- onreadystatechange( "timeout" );
- }
- }, s.timeout);
- }
+ // Timeout checker
+ if ( s.async && s.timeout > 0 ) {
+ setTimeout(function() {
+ // Check to see if the request is still happening
+ if ( xhr && !requestDone ) {
+ onreadystatechange( "timeout" );
+ }
+ }, s.timeout);
}
// Send the data
},
httpData: function( xhr, type, s ) {
- var ct = xhr.getResponseHeader("content-type"),
- xml = type === "xml" || !type && ct && ct.indexOf("xml") >= 0,
+ var ct = xhr.getResponseHeader("content-type") || "",
+ xml = type === "xml" || !type && ct.indexOf("xml") >= 0,
data = xml ? xhr.responseXML : xhr.responseText;
if ( xml && data.documentElement.nodeName === "parsererror" ) {
// The filter can actually parse the response
if ( typeof data === "string" ) {
-
// If the type is "script", eval it in global context
- if ( type === "script" ) {
+ if ( type === "script" || !type && ct.indexOf("javascript") >= 0 ) {
jQuery.globalEval( data );
}
// Get the JavaScript object, if JSON is used.
- if ( type === "json" ) {
- if ( typeof JSON === "object" && JSON.parse ) {
+ if ( type === "json" || !type && ct.indexOf("json") >= 0 ) {
+ // Try to use the native JSON parser first
+ try {
data = JSON.parse( data );
- } else {
+
+ } catch(e) {
data = (new Function("return " + data))();
}
}