var jsc = now();
jQuery.extend({
-
+
get: function( url, data, callback, type ) {
// shift arguments if data argument was ommited
if ( jQuery.isFunction( data ) ) {
// Last-Modified header cache for next request
lastModified: {},
+ etag: {},
ajax: function( s ) {
// Extend the settings, but re-extend 's' so that it can be
// Handle JSONP Parameter Callbacks
if ( s.dataType == "jsonp" ) {
if ( type == "GET" ) {
- if ( !s.url.match(jsre) )
- s.url += (s.url.match(/\?/) ? "&" : "?") + (s.jsonp || "callback") + "=?";
- } else if ( !s.data || !s.data.match(jsre) )
+ if ( jsre.test( !s.url ) )
+ s.url += (/\?/.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 && s.data.match(jsre) || s.url.match(jsre)) ) {
+ if ( s.dataType == "json" && (s.data && jsre.test(s.data) || jsre.test(s.url)) ) {
jsonp = "jsonp" + jsc++;
// Replace the =? sequence both in the query string and the data
// try replacing _= if it is there
var ret = s.url.replace(/(\?|&)_=.*?(&|$)/, "$1_=" + ts + "$2");
// if nothing was replaced, add timestamp to the end
- s.url = ret + ((ret == s.url) ? (s.url.match(/\?/) ? "&" : "?") + "_=" + ts : "");
+ s.url = ret + ((ret == s.url) ? (/\?/.test(s.url) ? "&" : "?") + "_=" + ts : "");
}
// If data is available, append data to url for get requests
if ( s.data && type == "GET" ) {
- s.url += (s.url.match(/\?/) ? "&" : "?") + s.data;
-
- // IE likes to send both get and post data, prevent this
- s.data = null;
+ s.url += (/\?/.test(s.url) ? "&" : "?") + s.data;
}
// Watch for a new set of requests
};
}
- head.appendChild(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;
if ( s.data )
xhr.setRequestHeader("Content-Type", s.contentType);
- // Set the If-Modified-Since header, if ifModified mode.
- if ( s.ifModified )
- xhr.setRequestHeader("If-Modified-Since",
- jQuery.lastModified[s.url] || "Thu, 01 Jan 1970 00:00:00 GMT" );
+ // 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
xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
}
// Make sure that the request was successful or notmodified
- if ( status == "success" ) {
- // Cache Last-Modified header, if ifModified mode.
- var modRes;
- try {
- modRes = xhr.getResponseHeader("Last-Modified");
- } catch(e) {} // swallow exception thrown by FF if header is not available
-
- if ( s.ifModified && modRes )
- jQuery.lastModified[s.url] = modRes;
-
+ if ( status == "success" || status == "notmodified" ) {
// JSONP handles its own success callback
if ( !jsonp )
success();
// Send the data
try {
- xhr.send(s.data);
+ xhr.send( type === "POST" ? s.data : null );
} catch(e) {
jQuery.handleError(s, xhr, null, e);
}
try {
// IE error sometimes returns 1223 when it should be 204 so treat it as success, see #1450
return !xhr.status && location.protocol == "file:" ||
- ( xhr.status >= 200 && xhr.status < 300 ) || xhr.status == 304 || xhr.status == 1223;
+ // Opera returns 0 when status is 304
+ ( xhr.status >= 200 && xhr.status < 300 ) || xhr.status == 304 || xhr.status == 1223 || xhr.status == 0;
} catch(e){}
return false;
},
// Determines if an XMLHttpRequest returns NotModified
httpNotModified: function( xhr, url ) {
- try {
- var xhrRes = xhr.getResponseHeader("Last-Modified");
+ var last_modified = xhr.getResponseHeader("Last-Modified");
+ var etag = xhr.getResponseHeader("Etag");
- // Firefox always returns 200. check Last-Modified date
- return xhr.status == 304 || xhrRes == jQuery.lastModified[url];
- } catch(e){}
- return false;
+ if (last_modified)
+ jQuery.lastModified[url] = last_modified;
+
+ if (etag)
+ jQuery.etag[url] = etag;
+
+ // Opera returns 0 when status is 304
+ return xhr.status == 304 || xhr.status == 0;
},
httpData: function( xhr, type, s ) {
xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0,
data = xml ? xhr.responseXML : xhr.responseText;
- if ( xml && data.documentElement.tagName == "parsererror" )
+ if ( xml && data.documentElement.nodeName == "parsererror" ) {
throw "parsererror";
-
+ }
+
// Allow a pre-filtering function to sanitize the response
// s != null is checked to keep backwards compatibility
- if( s && s.dataFilter )
+ if ( s && s.dataFilter ) {
data = s.dataFilter( data, type );
+ }
// The filter can actually parse the response
- if( typeof data === "string" ){
+ if ( typeof data === "string" ) {
// If the type is "script", eval it in global context
- if ( type == "script" )
+ if ( type === "script" ) {
jQuery.globalEval( data );
+ }
// Get the JavaScript object, if JSON is used.
- if ( type == "json" )
- data = window["eval"]("(" + data + ")");
+ if ( type == "json" ) {
+ if ( typeof JSON === "object" && JSON.parse ) {
+ data = JSON.parse( data );
+ } else {
+ data = (new Function("return " + data))();
+ }
+ }
}
-
+
return data;
},