Add the ability for DevTools to wrap network transactions.

chrome/browser/net/network_transaction.h

Index: chrome/browser/net/network_transaction.h
diff --git a/chrome/browser/net/network_transaction.h b/chrome/browser/net/network_transaction.h
new file mode 100644
index 0000000000000000000000000000000000000000..08776bcd5f3887a04d5949f9d23073afd714d94d
--- /dev/null
+++ b/chrome/browser/net/network_transaction.h
@@ -0,0 +1,93 @@
+// Copyright (c) 2014 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_NET_NETWORK_TRANSACTION_H_
+#define CHROME_BROWSER_NET_NETWORK_TRANSACTION_H_
+
+#include "net/base/completion_callback.h"
+#include "net/base/load_states.h"
+#include "net/base/net_export.h"
+#include "net/base/request_priority.h"
+#include "net/base/upload_progress.h"
+#include "net/http/http_transaction.h"
+#include "net/websockets/websocket_handshake_stream_base.h"
+
+class NetworkController;
+class GURL;
+
+namespace net {
+class AuthCredentials;
+class BoundNetLog;
+class HttpRequestHeaders;
+struct HttpRequestInfo;
+class HttpResponseInfo;
+class HttpNetworkSession;
+class IOBuffer;
+struct LoadTimingInfo;
+class X509Certificate;
+} // namespace net
+
+class NET_EXPORT NetworkTransaction : public net::HttpTransaction {

[mmenke, 2014/03/12 15:59:27]

Why are you adding all this stuff to browser/net instead of devtools now?

[eustas, 2014/03/13 13:11:09]

We (DevTools) hesitate to be the only client of the stack that intercepts all
network requests.

We hope that network controller will be reused by extensions and policies.

[mmenke, 2014/03/13 15:33:34]

Generally interception is done at the URLRequestJob layer, or in the
NetworkDelegate/URLRequest::Delegate layers.  I don't believe anything else will
need to intercept at the HttpNetworkTransaction layer.  Or do you know something
I don't?

In general, I prefer not to expand the commonly used interception methods.  I
consider this sort of a one-off need to intercept here.

+ public:
+  NetworkTransaction(
+      NetworkController* controller,
+      scoped_ptr<net::HttpTransaction>& network_transaction);
+
+  virtual ~NetworkTransaction();
+
+  const GURL& GetURL();
+  void Stop();
+
+  // HttpTransaction methods:
+  virtual int Start(
+      const net::HttpRequestInfo* request_info,
+      const net::CompletionCallback& callback,
+      const net::BoundNetLog& net_log) OVERRIDE;
+  virtual int RestartIgnoringLastError(
+      const net::CompletionCallback& callback) OVERRIDE;
+  virtual int RestartWithCertificate(
+      net::X509Certificate* client_cert,
+      const net::CompletionCallback& callback) OVERRIDE;
+  virtual int RestartWithAuth(
+      const net::AuthCredentials& credentials,
+      const net::CompletionCallback& callback) OVERRIDE;
+  virtual bool IsReadyToRestartForAuth() OVERRIDE;
+
+  virtual int Read(
+      net::IOBuffer* buf,
+      int buf_len,
+      const net::CompletionCallback& callback) OVERRIDE;
+  virtual void StopCaching() OVERRIDE;
+  virtual bool GetFullRequestHeaders(
+      net::HttpRequestHeaders* headers) const OVERRIDE;
+  virtual int64 GetTotalReceivedBytes() const OVERRIDE;
+  virtual void DoneReading() OVERRIDE;
+  virtual const net::HttpResponseInfo* GetResponseInfo() const OVERRIDE;
+  virtual net::LoadState GetLoadState() const OVERRIDE;
+  virtual net::UploadProgress GetUploadProgress() const OVERRIDE;
+  virtual void SetQuicServerInfo(
+      net::QuicServerInfo* quic_server_info) OVERRIDE;
+  virtual bool GetLoadTimingInfo(
+      net::LoadTimingInfo* load_timing_info) const OVERRIDE;
+  virtual void SetPriority(net::RequestPriority priority) OVERRIDE;
+  virtual void SetWebSocketHandshakeStreamCreateHelper(
+      net::WebSocketHandshakeStreamBase::CreateHelper* create_helper) OVERRIDE;
+  virtual void SetBeforeNetworkStartCallback(
+      const BeforeNetworkStartCallback& callback) OVERRIDE;
+  virtual int ResumeNetworkStart() OVERRIDE;
+
+ private:
+  void OnCallback(int result);
+
+  const uint64 id_;
+  NetworkController* controller_;
+  scoped_ptr<net::HttpTransaction> network_transaction_;
+  GURL url_;
+  net::CompletionCallback proxy_callback_;
+  net::CompletionCallback callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkTransaction);
+};
+
+#endif  // CHROME_BROWSER_NET_NETWORK_TRANSACTION_H_