Support retrieval of raw headers from network stack

chrome/browser/debugger/devtools_netlog_observer.h

+// Copyright (c) 2010 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.
+
+#ifndef CHROME_BROWSER_DEBUGGER_DEVTOOLS_NETLOG_OBSERVER_H_
+#define CHROME_BROWSER_DEBUGGER_DEVTOOLS_NETLOG_OBSERVER_H_
+#pragma once
+
+#include "base/hash_tables.h"
+#include "base/ref_counted.h"
+#include "chrome/browser/net/chrome_net_log.h"
+#include "webkit/glue/resource_loader_bridge.h"
+
+class IOThread;
+class URLRequest;
+struct ResourceResponse;
+
+// DevToolsNetLogObserver watches the NetLog event stream and collects the
+// stuff that may be of interest to DevTools. Currently, this only includes
+// actual HTTP/SPDY headers sent and received over the network.
+class DevToolsNetLogObserver: public ChromeNetLog::Observer {
+  typedef webkit_glue::ResourceLoaderBridge::DevToolsInfo ResourceInfo;
+
+ public:
+  // Observer implementation:
+  virtual void OnAddEntry(net::NetLog::EventType type,
+                          const base::TimeTicks& time,
+                          const net::NetLog::Source& source,
+                          net::NetLog::EventPhase phase,
+                          net::NetLog::EventParameters* params);
+
+  static void Attach(IOThread* thread);
+  static void Detach();
+
+  // Must be called on the IO thread. May return NULL if no observers
+  // are active.
+  static DevToolsNetLogObserver* GetInstance();
+  static void PopulateResponseInfo(URLRequest*, ResourceResponse*);
+
+ private:
+  typedef base::hash_map<uint32, scoped_refptr<ResourceInfo> >
+      RequestToInfoMap;
+
+  static DevToolsNetLogObserver* instance_;
+
+  explicit DevToolsNetLogObserver(ChromeNetLog* chrome_net_log);
+  ~DevToolsNetLogObserver();
+
+  ResourceInfo* GetResourceInfo(uint32 id);
+
+  ChromeNetLog* chrome_net_log_;
+  RequestToInfoMap request_to_info_;
+
+  DISALLOW_COPY_AND_ASSIGN(DevToolsNetLogObserver);
+};
+
+#endif  // CHROME_BROWSER_DEBUGGER_DEVTOOLS_NETLOG_OBSERVER_H_