Event matching by regular expression matching on URLs.

chrome/test/data/extensions/api_test/webrequest/test_declarative.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var onRequest = chrome.declarativeWebRequest.onRequest;
 var AddResponseHeader =
     chrome.declarativeWebRequest.AddResponseHeader;
 var RequestMatcher = chrome.declarativeWebRequest.RequestMatcher;
 var CancelRequest = chrome.declarativeWebRequest.CancelRequest;
 var RedirectByRegEx = chrome.declarativeWebRequest.RedirectByRegEx;
@@ skipping 234 matching lines @@
 
     onRequest.addRules(
       [ {conditions: [new RequestMatcher({url: {pathSuffix: ".html"}})],
          actions: [
              new RedirectByRegEx({from: "^(.*)/a.html$", to: "$1/b.html"})]}
       ],
       function() {navigateAndWait(getURLHttpSimple());}
     );
   },
 
+  function testRegexFilter() {
+    ignoreUnexpected = true;
+    expect(
+      [
+        { label: "onErrorOccurred",
+          event: "onErrorOccurred",
+          details: {
+            url: getURLHttpSimple(),
+            fromCache: false,
+            error: "net::ERR_BLOCKED_BY_CLIENT"
+          }
+        },
+      ],
+      [ ["onErrorOccurred"] ]);
+    onRequest.addRules(
+      [ {'conditions': [
+           new RequestMatcher({
+             'url': {
+                 'urlMatches': 'simple[A-Z].*a\.html$',
+                 'schemes': ["http"]
+             },
+           })],
+         'actions': [new CancelRequest()]}
+      ],
+      function() {navigateAndWait(getURLHttpSimple());}
+    );
+  },
+
   function testSetRequestHeader() {
     ignoreUnexpected = true;
     expect();  // Used for initialization.
     onRequest.addRules(
       [{conditions: [new RequestMatcher()],
         actions: [new SetRequestHeader({name: "User-Agent", value: "FoobarUA"})]
        }],
       function() {
         // Check the page content for our modified User-Agent string.
         navigateAndWait(getURLEchoUserAgent(), function() {
@@ skipping 205 matching lines @@
                   this.status + ", responseText: " + this.responseText);
             }
           }
           req.open("GET", getURLHttpXHRData(), asynchronous);
           req.send(null);
         });
       }
     );
   },
   ]);