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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.
#include "content/browser/renderer_host/websocket_host.h"
#include "base/basictypes.h"
#include "base/strings/string_util.h"
#include "content/browser/renderer_host/websocket_dispatcher_host.h"
#include "content/common/websocket_messages.h"
#include "ipc/ipc_message_macros.h"
#include "net/websockets/websocket_channel.h"
#include "net/websockets/websocket_event_interface.h"
#include "net/websockets/websocket_frame.h" // for WebSocketFrameHeader::OpCode
namespace content {
namespace {
typedef net::WebSocketEventInterface::ChannelState ChannelState;
// Convert a content::WebSocketMessageType to a
// net::WebSocketFrameHeader::OpCode
net::WebSocketFrameHeader::OpCode MessageTypeToOpCode(
WebSocketMessageType type) {
DCHECK(type == WEB_SOCKET_MESSAGE_TYPE_CONTINUATION ||
type == WEB_SOCKET_MESSAGE_TYPE_TEXT ||
type == WEB_SOCKET_MESSAGE_TYPE_BINARY);
typedef net::WebSocketFrameHeader::OpCode OpCode;
// These compile asserts verify that the same underlying values are used for
// both types, so we can simply cast between them.
COMPILE_ASSERT(static_cast<OpCode>(WEB_SOCKET_MESSAGE_TYPE_CONTINUATION) ==
net::WebSocketFrameHeader::kOpCodeContinuation,
enum_values_must_match_for_opcode_continuation);
COMPILE_ASSERT(static_cast<OpCode>(WEB_SOCKET_MESSAGE_TYPE_TEXT) ==
net::WebSocketFrameHeader::kOpCodeText,
enum_values_must_match_for_opcode_text);
COMPILE_ASSERT(static_cast<OpCode>(WEB_SOCKET_MESSAGE_TYPE_BINARY) ==
net::WebSocketFrameHeader::kOpCodeBinary,
enum_values_must_match_for_opcode_binary);
return static_cast<OpCode>(type);
}
WebSocketMessageType OpCodeToMessageType(
net::WebSocketFrameHeader::OpCode opCode) {
DCHECK(opCode == net::WebSocketFrameHeader::kOpCodeContinuation ||
opCode == net::WebSocketFrameHeader::kOpCodeText ||
opCode == net::WebSocketFrameHeader::kOpCodeBinary);
// This cast is guaranteed valid by the COMPILE_ASSERT() statements above.
return static_cast<WebSocketMessageType>(opCode);
}
ChannelState StateCast(WebSocketDispatcherHost::WebSocketHostState host_state) {
const WebSocketDispatcherHost::WebSocketHostState WEBSOCKET_HOST_ALIVE =
WebSocketDispatcherHost::WEBSOCKET_HOST_ALIVE;
const WebSocketDispatcherHost::WebSocketHostState WEBSOCKET_HOST_DELETED =
WebSocketDispatcherHost::WEBSOCKET_HOST_DELETED;
DCHECK(host_state == WEBSOCKET_HOST_ALIVE ||
host_state == WEBSOCKET_HOST_DELETED);
// These compile asserts verify that we can get away with using static_cast<>
// for the conversion.
COMPILE_ASSERT(static_cast<ChannelState>(WEBSOCKET_HOST_ALIVE) ==
net::WebSocketEventInterface::CHANNEL_ALIVE,
enum_values_must_match_for_state_alive);
COMPILE_ASSERT(static_cast<ChannelState>(WEBSOCKET_HOST_DELETED) ==
net::WebSocketEventInterface::CHANNEL_DELETED,
enum_values_must_match_for_state_deleted);
return static_cast<ChannelState>(host_state);
}
// Implementation of net::WebSocketEventInterface. Receives events from our
// WebSocketChannel object. Each event is translated to an IPC and sent to the
// renderer or child process via WebSocketDispatcherHost.
class WebSocketEventHandler : public net::WebSocketEventInterface {
public:
WebSocketEventHandler(WebSocketDispatcherHost* dispatcher, int routing_id);
virtual ~WebSocketEventHandler();
// net::WebSocketEventInterface implementation
// TODO(ricea): Add |extensions| parameter to pass the list of enabled
// WebSocket extensions through to the renderer to make it visible to
// Javascript.
virtual ChannelState OnAddChannelResponse(
bool fail,
const std::string& selected_subprotocol) OVERRIDE;
virtual ChannelState OnDataFrame(bool fin,
WebSocketMessageType type,
const std::vector<char>& data) OVERRIDE;
virtual ChannelState OnClosingHandshake() OVERRIDE;
virtual ChannelState OnFlowControl(int64 quota) OVERRIDE;
virtual ChannelState OnDropChannel(uint16 code,
const std::string& reason) OVERRIDE;
private:
WebSocketDispatcherHost* const dispatcher_;
const int routing_id_;
DISALLOW_COPY_AND_ASSIGN(WebSocketEventHandler);
};
WebSocketEventHandler::WebSocketEventHandler(
WebSocketDispatcherHost* dispatcher,
int routing_id)
: dispatcher_(dispatcher), routing_id_(routing_id) {}
WebSocketEventHandler::~WebSocketEventHandler() {
DVLOG(1) << "WebSocketEventHandler destroyed routing_id=" << routing_id_;
}
ChannelState WebSocketEventHandler::OnAddChannelResponse(
bool fail,
const std::string& selected_protocol) {
DVLOG(3) << "WebSocketEventHandler::OnAddChannelResponse"
<< " routing_id=" << routing_id_ << " fail=" << fail
<< " selected_protocol=\"" << selected_protocol << "\"";
return StateCast(dispatcher_->SendAddChannelResponse(
routing_id_, fail, selected_protocol, std::string()));
}
ChannelState WebSocketEventHandler::OnDataFrame(
bool fin,
net::WebSocketFrameHeader::OpCode type,
const std::vector<char>& data) {
DVLOG(3) << "WebSocketEventHandler::OnDataFrame"
<< " routing_id=" << routing_id_ << " fin=" << fin
<< " type=" << type << " data is " << data.size() << " bytes";
return StateCast(dispatcher_->SendFrame(
routing_id_, fin, OpCodeToMessageType(type), data));
}
ChannelState WebSocketEventHandler::OnClosingHandshake() {
DVLOG(3) << "WebSocketEventHandler::OnClosingHandshake"
<< " routing_id=" << routing_id_;
return StateCast(dispatcher_->SendClosing(routing_id_));
}
ChannelState WebSocketEventHandler::OnFlowControl(int64 quota) {
DVLOG(3) << "WebSocketEventHandler::OnFlowControl"
<< " routing_id=" << routing_id_ << " quota=" << quota;
return StateCast(dispatcher_->SendFlowControl(routing_id_, quota));
}
ChannelState WebSocketEventHandler::OnDropChannel(uint16 code,
const std::string& reason) {
DVLOG(3) << "WebSocketEventHandler::OnDropChannel"
<< " routing_id=" << routing_id_ << " code=" << code
<< " reason=\"" << reason << "\"";
return StateCast(dispatcher_->DoDropChannel(routing_id_, code, reason));
}
} // namespace
WebSocketHost::WebSocketHost(int routing_id,
WebSocketDispatcherHost* dispatcher,
net::URLRequestContext* url_request_context)
: routing_id_(routing_id) {
DVLOG(1) << "WebSocketHost: created routing_id=" << routing_id;
scoped_ptr<net::WebSocketEventInterface> event_interface(
new WebSocketEventHandler(dispatcher, routing_id));
channel_.reset(
new net::WebSocketChannel(event_interface.Pass(), url_request_context));
}
WebSocketHost::~WebSocketHost() {}
bool WebSocketHost::OnMessageReceived(const IPC::Message& message,
bool* message_was_ok) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP_EX(WebSocketHost, message, *message_was_ok)
IPC_MESSAGE_HANDLER(WebSocketHostMsg_AddChannelRequest, OnAddChannelRequest)
IPC_MESSAGE_HANDLER(WebSocketMsg_SendFrame, OnSendFrame)
IPC_MESSAGE_HANDLER(WebSocketMsg_FlowControl, OnFlowControl)
IPC_MESSAGE_HANDLER(WebSocketMsg_DropChannel, OnDropChannel)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP_EX()
return handled;
}
void WebSocketHost::OnAddChannelRequest(
const GURL& socket_url,
const std::vector<std::string>& requested_protocols,
const GURL& origin) {
DVLOG(3) << "WebSocketHost::OnAddChannelRequest"
<< " routing_id=" << routing_id_ << " socket_url=\"" << socket_url
<< "\" requested_protocols=\""
<< JoinString(requested_protocols, ", ") << "\" origin=\"" << origin
<< "\"";
channel_->SendAddChannelRequest(socket_url, requested_protocols, origin);
}
void WebSocketHost::OnSendFrame(bool fin,
WebSocketMessageType type,
const std::vector<char>& data) {
DVLOG(3) << "WebSocketHost::OnSendFrame"
<< " routing_id=" << routing_id_ << " fin=" << fin
<< " type=" << type << " data is " << data.size() << " bytes";
channel_->SendFrame(fin, MessageTypeToOpCode(type), data);
}
void WebSocketHost::OnFlowControl(int64 quota) {
DVLOG(3) << "WebSocketHost::OnFlowControl"
<< " routing_id=" << routing_id_ << " quota=" << quota;
channel_->SendFlowControl(quota);
}
void WebSocketHost::OnDropChannel(bool was_clean,
uint16 code,
const std::string& reason) {
DVLOG(3) << "WebSocketHost::OnDropChannel"
<< " routing_id=" << routing_id_ << " was_clean=" << was_clean
<< " code=" << code << " reason=\"" << reason << "\"";
// TODO(yhirano): Handle |was_clean| appropriately.
channel_->StartClosingHandshake(code, reason);
}
} // namespace content
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