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// Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_WEBSOCKET_DISPATCHER_HOST_H_
#define CONTENT_BROWSER_RENDERER_HOST_WEBSOCKET_DISPATCHER_HOST_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/containers/hash_tables.h"
#include "content/common/content_export.h"
#include "content/common/websocket.h"
#include "content/public/browser/browser_message_filter.h"
namespace net {
class URLRequestContext;
} // namespace net
namespace content {
struct WebSocketHandshakeRequest;
struct WebSocketHandshakeResponse;
class WebSocketHost;
// Creates a WebSocketHost object for each WebSocket channel, and dispatches
// WebSocketMsg_* messages sent from renderer to the appropriate WebSocketHost.
class CONTENT_EXPORT WebSocketDispatcherHost : public BrowserMessageFilter {
public:
typedef base::Callback<net::URLRequestContext*()> GetRequestContextCallback;
// Given a routing_id, WebSocketHostFactory returns a new instance of
// WebSocketHost or its subclass.
typedef base::Callback<WebSocketHost*(int)> WebSocketHostFactory; // NOLINT
// Return value for methods that may delete the WebSocketHost. This enum is
// binary-compatible with net::WebSocketEventInterface::ChannelState, to make
// conversion cheap. By using a separate enum including net/ header files can
// be avoided.
enum WebSocketHostState {
WEBSOCKET_HOST_ALIVE,
WEBSOCKET_HOST_DELETED
};
WebSocketDispatcherHost(
int process_id,
const GetRequestContextCallback& get_context_callback);
// For testing. Specify a factory method that creates mock version of
// WebSocketHost.
WebSocketDispatcherHost(int process_id,
const GetRequestContextCallback& get_context_callback,
const WebSocketHostFactory& websocket_host_factory);
// BrowserMessageFilter:
bool OnMessageReceived(const IPC::Message& message) override;
// The following methods are used by WebSocketHost::EventInterface to send
// IPCs from the browser to the renderer or child process. Any of them may
// return WEBSOCKET_HOST_DELETED and delete the WebSocketHost on failure,
// leading to the WebSocketChannel and EventInterface also being deleted.
// Sends a WebSocketMsg_AddChannelResponse IPC, and then deletes and
// unregisters the WebSocketHost if |fail| is true.
WebSocketHostState SendAddChannelResponse(
int routing_id,
bool fail,
const std::string& selected_protocol,
const std::string& extensions) WARN_UNUSED_RESULT;
// Sends a WebSocketMsg_SendFrame IPC.
WebSocketHostState SendFrame(int routing_id,
bool fin,
WebSocketMessageType type,
const std::vector<char>& data);
// Sends a WebSocketMsg_FlowControl IPC.
WebSocketHostState SendFlowControl(int routing_id,
int64 quota) WARN_UNUSED_RESULT;
// Sends a WebSocketMsg_NotifyClosing IPC
WebSocketHostState NotifyClosingHandshake(int routing_id) WARN_UNUSED_RESULT;
// Sends a WebSocketMsg_NotifyStartOpeningHandshake IPC.
WebSocketHostState NotifyStartOpeningHandshake(
int routing_id,
const WebSocketHandshakeRequest& request) WARN_UNUSED_RESULT;
// Sends a WebSocketMsg_NotifyFinishOpeningHandshake IPC.
WebSocketHostState NotifyFinishOpeningHandshake(
int routing_id,
const WebSocketHandshakeResponse& response) WARN_UNUSED_RESULT;
// Sends a WebSocketMsg_NotifyFailure IPC and deletes and unregisters the
// channel.
WebSocketHostState NotifyFailure(
int routing_id,
const std::string& message) WARN_UNUSED_RESULT;
// Sends a WebSocketMsg_DropChannel IPC and deletes and unregisters the
// channel.
WebSocketHostState DoDropChannel(
int routing_id,
bool was_clean,
uint16 code,
const std::string& reason) WARN_UNUSED_RESULT;
// Returns whether the associated renderer process can read raw cookies.
bool CanReadRawCookies() const;
int render_process_id() const { return process_id_; }
private:
typedef base::hash_map<int, WebSocketHost*> WebSocketHostTable;
~WebSocketDispatcherHost() override;
WebSocketHost* CreateWebSocketHost(int routing_id);
// Looks up a WebSocketHost object by |routing_id|. Returns the object if one
// is found, or NULL otherwise.
WebSocketHost* GetHost(int routing_id) const;
// Sends the passed in IPC::Message via the BrowserMessageFilter::Send()
// method. If sending the IPC fails, assumes that this connection is no
// longer useable, calls DeleteWebSocketHost(), and returns
// WEBSOCKET_HOST_DELETED. The behaviour is the same for all message types.
WebSocketHostState SendOrDrop(IPC::Message* message) WARN_UNUSED_RESULT;
// Deletes the WebSocketHost object associated with the given |routing_id| and
// removes it from the |hosts_| table.
void DeleteWebSocketHost(int routing_id);
// Table of WebSocketHost objects, owned by this object, indexed by
// routing_id.
WebSocketHostTable hosts_;
// The the process ID of the associated renderer process.
const int process_id_;
// A callback which returns the appropriate net::URLRequestContext for us to
// use.
GetRequestContextCallback get_context_callback_;
WebSocketHostFactory websocket_host_factory_;
DISALLOW_COPY_AND_ASSIGN(WebSocketDispatcherHost);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_WEBSOCKET_DISPATCHER_HOST_H_
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