DevTools protocol interception, blocking & modification of requests

third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 739 matching lines @@
 
   if (response.getSecurityStyle() != ResourceResponse::SecurityStyleUnknown &&
       response.getSecurityStyle() !=
           ResourceResponse::SecurityStyleUnauthenticated) {
     const ResourceResponse::SecurityDetails* responseSecurityDetails =
         response.getSecurityDetails();
     m_resourcesData->setCertificate(requestId,
                                     responseSecurityDetails->certificate);
   }
 
-  if (resourceResponse && !resourceIsEmpty)
+  String interceptId =
+      response.httpHeaderField(HTTPNames::X_DevTools_Intercept_Id);
+  if (!interceptId.isEmpty()) {
+    const_cast<ResourceResponse&>(response).clearHTTPHeaderField(
+        HTTPNames::X_DevTools_Intercept_Id);
+  }
+
+  if (resourceResponse && !resourceIsEmpty) {
     frontend()->responseReceived(requestId, frameId, loaderId,
                                  monotonicallyIncreasingTime(),
                                  InspectorPageAgent::resourceTypeJson(type),
-                                 std::move(resourceResponse));
+                                 std::move(resourceResponse), interceptId);
+  }
   // If we revalidated the resource and got Not modified, send content length
   // following didReceiveResponse as there will be no calls to didReceiveData
   // from the network stack.
   if (isNotModified && cachedResource && cachedResource->encodedSize())
     didReceiveData(frame, identifier, 0, cachedResource->encodedSize());
 }
 
 static bool isErrorStatusCode(int statusCode) {
   return statusCode >= 400;
 }
@@ skipping 771 matching lines @@
           TaskRunnerHelper::get(TaskType::UnspecedLoading,
                                 inspectedFrames->root()),
           this,
           &InspectorNetworkAgent::removeFinishedReplayXHRFired) {}
 
 bool InspectorNetworkAgent::shouldForceCORSPreflight() {
   return m_state->booleanProperty(NetworkAgentState::cacheDisabled, false);
 }
 
 }  // namespace blink