[DevTools] Allow stars in blocked url pattern.

Source/core/inspector/InspectorResourceAgent.cpp

Index: Source/core/inspector/InspectorResourceAgent.cpp
diff --git a/Source/core/inspector/InspectorResourceAgent.cpp b/Source/core/inspector/InspectorResourceAgent.cpp
index 8aec85c9d0b3695925377e18911f1eced012a139..d72695899a3d611deab949242d2e00862949654c 100644
--- a/Source/core/inspector/InspectorResourceAgent.cpp
+++ b/Source/core/inspector/InspectorResourceAgent.cpp
@@ -95,6 +95,27 @@ namespace {
 // Keep in sync with kDevToolsRequestInitiator defined in devtools_network_controller.cc
 const char kDevToolsEmulateNetworkConditionsClientId[] = "X-DevTools-Emulate-Network-Conditions-Client-Id";
 
+// Pattern may contain stars ('*') which match to any (possibly empty) string.
+// Stars implicitly assumed at the begin/end of pattern.
+bool matches(const String& url, const String& pattern)
+{
+    size_t done = 0;
+    size_t pos = 0;

[caseq, 2015/09/08 23:02:14]

move down to actual usage?

+    while (done < pattern.length()) {
+        size_t index = pattern.find('*', done);
+        if (index == kNotFound)
+            index = pattern.length();
+        if (index > done) {
+            pos = url.find(pattern.substring(done, index - done));

[caseq, 2015/09/08 23:02:14]

So a*b*c would match "bac", right?

+            if (pos == kNotFound)
+                return false;
+            pos = pos + index - done;

[caseq, 2015/09/08 23:02:14]

what is the effect of this?

+        }
+        done = index + 1;
+    }
+    return true;
+}
+
 static PassRefPtr<JSONObject> buildObjectForHeaders(const HTTPHeaderMap& headers)
 {
     RefPtr<JSONObject> headersObject = JSONObject::create();
@@ -407,7 +428,7 @@ bool InspectorResourceAgent::shouldBlockRequest(const ResourceRequest& request)
     String url = request.url().string();
     RefPtr<JSONObject> blockedURLs = m_state->getObject(ResourceAgentState::blockedURLs);
     for (const auto& entry : *blockedURLs) {
-        if (url.contains(entry.key))
+        if (matches(url, entry.key))
             return true;
     }
     return false;