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socket_stream_dispatcher_host.h

// Copyright (c) 2009 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_RENDERER_HOST_SOCKET_STREAM_DISPATCHER_HOST_H_
#define CHROME_BROWSER_RENDERER_HOST_SOCKET_STREAM_DISPATCHER_HOST_H_

#include <vector>

#include "base/id_map.h"
#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
#include "ipc/ipc_message.h"
#include "net/socket_stream/socket_stream.h"

class GURL;
class SocketStreamHost;

// Dispatches ViewHostMsg_SocketStream_* messages sent from renderer.
// It also acts as SocketStream::Delegate so that it sends
// ViewMsg_SocketStream_* messages back to renderer.
class SocketStreamDispatcherHost : public net::SocketStream::Delegate {
 public:
  SocketStreamDispatcherHost();
  virtual ~SocketStreamDispatcherHost();

  bool OnMessageReceived(const IPC::Message& msg,
                         ResourceDispatcherHost::Receiver* receiver,
                         bool* msg_ok);
  // The object died, so cancel and detach all requests associated with it.
  void CancelRequestsForProcess(int host_id);

  // SocketStream::Delegate methods.
  virtual void OnConnected(net::SocketStream* socket,
                           int max_pending_send_allowed);
  virtual void OnSentData(net::SocketStream* socket, int amount_sent);
  virtual void OnReceivedData(net::SocketStream* socket,
                              const char* data, int len);
  virtual void OnClose(net::SocketStream* socket);

 private:
  // Message handlers called by OnMessageReceived.
  void OnConnect(const GURL& url, int socket_id);
  void OnSendData(int socket_id, const std::vector<char>& data);
  void OnCloseReq(int socket_id);

  void DeleteSocketStreamHost(int host_id, int socket_id);

  void AddHostMap(int host_id, int socket_id,
                  SocketStreamHost* socket_stream_host);
  SocketStreamHost* LookupHostMap(int host_id, int socket_id);

  // Returns true if the message passed in is a SocketStream related message.
  static bool IsSocketStreamDispatcherHostMessage(const IPC::Message& message);

  // key: host_id -> { key: socket_id -> value: SocketStreamHost }
  IDMap< IDMap<SocketStreamHost> > hostmap_;

  // valid while OnMessageReceived processing.
  ResourceDispatcherHost::Receiver* receiver_;

  DISALLOW_COPY_AND_ASSIGN(SocketStreamDispatcherHost);
};

#endif  // CHROME_BROWSER_RENDERER_HOST_SOCKET_STREAM_DISPATCHER_HOST_H_

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