X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Fajax.js;h=beed45fbfdf596b269924836a3c0ba75ea74f5da;hb=991d039b62f5dfcb9e3d99fe28212a6874e8f5c7;hp=0f5f80529a90321616f7d3f56a1577d976faf011;hpb=ca79d866fe07302f03df2b3db09c886c6abef9ff;p=jquery.git

diff --git a/src/ajax.js b/src/ajax.js
index 0f5f805..beed45f 100644
--- a/src/ajax.js
+++ b/src/ajax.js
@@ -95,7 +95,7 @@ jQuery.each( "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess,ajaxSend".sp
 var jsc = now();
 
 jQuery.extend({
-  
+
 	get: function( url, data, callback, type ) {
 		// shift arguments if data argument was ommited
 		if ( jQuery.isFunction( data ) ) {
@@ -170,6 +170,7 @@ jQuery.extend({
 
 	// Last-Modified header cache for next request
 	lastModified: {},
+	etag: {},
 
 	ajax: function( s ) {
 		// Extend the settings, but re-extend 's' so that it can be
@@ -233,9 +234,6 @@ jQuery.extend({
 		// 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;
 		}
 
 		// Watch for a new set of requests
@@ -275,7 +273,9 @@ jQuery.extend({
 				};
 			}
 
-			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;
@@ -299,10 +299,13 @@ jQuery.extend({
 			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");
@@ -364,16 +367,7 @@ jQuery.extend({
 				}
 
 				// 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();
@@ -407,7 +401,7 @@ jQuery.extend({
 
 		// Send the data
 		try {
-			xhr.send(s.data);
+			xhr.send( type === "POST" ? s.data : null );
 		} catch(e) {
 			jQuery.handleError(s, xhr, null, e);
 		}
@@ -461,20 +455,25 @@ jQuery.extend({
 		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 ) {
@@ -482,26 +481,34 @@ jQuery.extend({
 			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.tagName == "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;
 	},