Save real target URLs from Google search results

"Save Link as Zotero Item" previously saved Google's tracking page
instead of the real destination. This can be extended to other sites
if necessary.

chrome/content/zotero/xpcom/utilities.js

@@ -1417,5 +1417,32 @@ Zotero.Utilities = {
 				}
 			}
 		}
+	},
+	
+	
+	/**
+	 * Get the real target URL from an intermediate URL
+	 */
+	"resolveIntermediateURL":function(url) {
+		var patterns = [
+			// Google search results
+			{
+				regexp: /^https?:\/\/(www.)?google\.(com|(com?\.)?[a-z]{2})\/url\?/,
+				variable: "url"
+			}
+		];
+		
+		for (var i=0, len=patterns.length; i<len; i++) {
+			if (!url.match(patterns[i].regexp)) {
+				continue;
+			}
+			var matches = url.match(new RegExp("&" + patterns[i].variable + "=(.+?)(&|$)"));
+			if (!matches) {
+				continue;
+			}
+			return decodeURIComponent(matches[1]);
+		}
+		
+		return url;
 	}
 }

chrome/content/zotero/zoteroPane.js

@@ -3197,6 +3197,8 @@ var ZoteroPane = new function()
 		
 		var self = this;
 		
+		url = Zotero.Utilities.resolveIntermediateURL(url);
+		
 		Zotero.MIME.getMIMETypeFromURL(url, function (mimeType, hasNativeHandler) {
 			// If native type, save using a hidden browser
 			if (hasNativeHandler) {