src/mojo/services/network/web_socket_impl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/services/network/web_socket_impl.h"
   6
   7 #include "base/logging.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "mojo/common/handle_watcher.h"
  10 #include "mojo/services/network/network_context.h"
  11 #include "mojo/services/public/cpp/network/web_socket_read_queue.h"
  12 #include "mojo/services/public/cpp/network/web_socket_write_queue.h"
  13 #include "net/websockets/websocket_channel.h"
  14 #include "net/websockets/websocket_errors.h"
  15 #include "net/websockets/websocket_event_interface.h"
  16 #include "net/websockets/websocket_frame.h"  // for WebSocketFrameHeader::OpCode
  17 #include "net/websockets/websocket_handshake_request_info.h"
  18 #include "net/websockets/websocket_handshake_response_info.h"
  19 #include "url/origin.h"
  20
  21 namespace mojo {
  22
  23 template <>
  24 struct TypeConverter<net::WebSocketFrameHeader::OpCode,
  25                      WebSocket::MessageType> {
  26   static net::WebSocketFrameHeader::OpCode Convert(
  27       WebSocket::MessageType type) {
  28     DCHECK(type == WebSocket::MESSAGE_TYPE_CONTINUATION ||
  29            type == WebSocket::MESSAGE_TYPE_TEXT ||
  30            type == WebSocket::MESSAGE_TYPE_BINARY);
  31     typedef net::WebSocketFrameHeader::OpCode OpCode;
  32     // These compile asserts verify that the same underlying values are used for
  33     // both types, so we can simply cast between them.
  34     COMPILE_ASSERT(static_cast<OpCode>(WebSocket::MESSAGE_TYPE_CONTINUATION) ==
  35                        net::WebSocketFrameHeader::kOpCodeContinuation,
  36                    enum_values_must_match_for_opcode_continuation);
  37     COMPILE_ASSERT(static_cast<OpCode>(WebSocket::MESSAGE_TYPE_TEXT) ==
  38                        net::WebSocketFrameHeader::kOpCodeText,
  39                    enum_values_must_match_for_opcode_text);
  40     COMPILE_ASSERT(static_cast<OpCode>(WebSocket::MESSAGE_TYPE_BINARY) ==
  41                        net::WebSocketFrameHeader::kOpCodeBinary,
  42                    enum_values_must_match_for_opcode_binary);
  43     return static_cast<OpCode>(type);
  44   }
  45 };
  46
  47 template <>
  48 struct TypeConverter<WebSocket::MessageType,
  49                      net::WebSocketFrameHeader::OpCode> {
  50   static WebSocket::MessageType Convert(
  51       net::WebSocketFrameHeader::OpCode type) {
  52     DCHECK(type == net::WebSocketFrameHeader::kOpCodeContinuation ||
  53            type == net::WebSocketFrameHeader::kOpCodeText ||
  54            type == net::WebSocketFrameHeader::kOpCodeBinary);
  55     return static_cast<WebSocket::MessageType>(type);
  56   }
  57 };
  58
  59 namespace {
  60
  61 typedef net::WebSocketEventInterface::ChannelState ChannelState;
  62
  63 struct WebSocketEventHandler : public net::WebSocketEventInterface {
  64  public:
  65   WebSocketEventHandler(WebSocketClientPtr client)
  66       : client_(client.Pass()) {
  67   }
  68   ~WebSocketEventHandler() override {}
  69
  70  private:
  71   // net::WebSocketEventInterface methods:
  72   ChannelState OnAddChannelResponse(bool fail,
  73                                     const std::string& selected_subprotocol,
  74                                     const std::string& extensions) override;
  75   ChannelState OnDataFrame(bool fin,
  76                            WebSocketMessageType type,
  77                            const std::vector<char>& data) override;
  78   ChannelState OnClosingHandshake() override;
  79   ChannelState OnFlowControl(int64 quota) override;
  80   ChannelState OnDropChannel(bool was_clean,
  81                              uint16 code,
  82                              const std::string& reason) override;
  83   ChannelState OnFailChannel(const std::string& message) override;
  84   ChannelState OnStartOpeningHandshake(
  85       scoped_ptr<net::WebSocketHandshakeRequestInfo> request) override;
  86   ChannelState OnFinishOpeningHandshake(
  87       scoped_ptr<net::WebSocketHandshakeResponseInfo> response) override;
  88   ChannelState OnSSLCertificateError(
  89       scoped_ptr<net::WebSocketEventInterface::SSLErrorCallbacks> callbacks,
  90       const GURL& url,
  91       const net::SSLInfo& ssl_info,
  92       bool fatal) override;
  93
  94   // Called once we've written to |receive_stream_|.
  95   void DidWriteToReceiveStream(bool fin,
  96                                net::WebSocketFrameHeader::OpCode type,
  97                                uint32_t num_bytes,
  98                                const char* buffer);
  99   WebSocketClientPtr client_;
 100   ScopedDataPipeProducerHandle receive_stream_;
 101   scoped_ptr<WebSocketWriteQueue> write_queue_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(WebSocketEventHandler);
 104 };
 105
 106 ChannelState WebSocketEventHandler::OnAddChannelResponse(
 107     bool fail,
 108     const std::string& selected_protocol,
 109     const std::string& extensions) {
 110   DataPipe data_pipe;
 111   receive_stream_ = data_pipe.producer_handle.Pass();
 112   write_queue_.reset(new WebSocketWriteQueue(receive_stream_.get()));
 113   client_->DidConnect(
 114       fail, selected_protocol, extensions, data_pipe.consumer_handle.Pass());
 115   if (fail)
 116     return WebSocketEventInterface::CHANNEL_DELETED;
 117   return WebSocketEventInterface::CHANNEL_ALIVE;
 118 }
 119
 120 ChannelState WebSocketEventHandler::OnDataFrame(
 121     bool fin,
 122     net::WebSocketFrameHeader::OpCode type,
 123     const std::vector<char>& data) {
 124   uint32_t size = static_cast<uint32_t>(data.size());
 125   write_queue_->Write(
 126       &data[0], size,
 127       base::Bind(&WebSocketEventHandler::DidWriteToReceiveStream,
 128                  base::Unretained(this),
 129                  fin, type, size));
 130   return WebSocketEventInterface::CHANNEL_ALIVE;
 131 }
 132
 133 ChannelState WebSocketEventHandler::OnClosingHandshake() {
 134   return WebSocketEventInterface::CHANNEL_ALIVE;
 135 }
 136
 137 ChannelState WebSocketEventHandler::OnFlowControl(int64 quota) {
 138   client_->DidReceiveFlowControl(quota);
 139   return WebSocketEventInterface::CHANNEL_ALIVE;
 140 }
 141
 142 ChannelState WebSocketEventHandler::OnDropChannel(bool was_clean,
 143                                                   uint16 code,
 144                                                   const std::string& reason) {
 145   client_->DidClose(was_clean, code, reason);
 146   return WebSocketEventInterface::CHANNEL_DELETED;
 147 }
 148
 149 ChannelState WebSocketEventHandler::OnFailChannel(const std::string& message) {
 150   client_->DidFail(message);
 151   return WebSocketEventInterface::CHANNEL_DELETED;
 152 }
 153
 154 ChannelState WebSocketEventHandler::OnStartOpeningHandshake(
 155     scoped_ptr<net::WebSocketHandshakeRequestInfo> request) {
 156   return WebSocketEventInterface::CHANNEL_ALIVE;
 157 }
 158
 159 ChannelState WebSocketEventHandler::OnFinishOpeningHandshake(
 160     scoped_ptr<net::WebSocketHandshakeResponseInfo> response) {
 161   return WebSocketEventInterface::CHANNEL_ALIVE;
 162 }
 163
 164 ChannelState WebSocketEventHandler::OnSSLCertificateError(
 165     scoped_ptr<net::WebSocketEventInterface::SSLErrorCallbacks> callbacks,
 166     const GURL& url,
 167     const net::SSLInfo& ssl_info,
 168     bool fatal) {
 169   client_->DidFail("SSL Error");
 170   return WebSocketEventInterface::CHANNEL_DELETED;
 171 }
 172
 173 void WebSocketEventHandler::DidWriteToReceiveStream(
 174     bool fin,
 175     net::WebSocketFrameHeader::OpCode type,
 176     uint32_t num_bytes,
 177     const char* buffer) {
 178   client_->DidReceiveData(
 179       fin, ConvertTo<WebSocket::MessageType>(type), num_bytes);
 180 }
 181
 182 }  // namespace mojo
 183
 184 WebSocketImpl::WebSocketImpl(NetworkContext* context) : context_(context) {
 185 }
 186
 187 WebSocketImpl::~WebSocketImpl() {
 188 }
 189
 190 void WebSocketImpl::Connect(const String& url,
 191                             Array<String> protocols,
 192                             const String& origin,
 193                             ScopedDataPipeConsumerHandle send_stream,
 194                             WebSocketClientPtr client) {
 195   DCHECK(!channel_);
 196   send_stream_ = send_stream.Pass();
 197   read_queue_.reset(new WebSocketReadQueue(send_stream_.get()));
 198   scoped_ptr<net::WebSocketEventInterface> event_interface(
 199       new WebSocketEventHandler(client.Pass()));
 200   channel_.reset(new net::WebSocketChannel(event_interface.Pass(),
 201                                            context_->url_request_context()));
 202   channel_->SendAddChannelRequest(GURL(url.get()),
 203                                   protocols.To<std::vector<std::string> >(),
 204                                   url::Origin(origin.get()));
 205 }
 206
 207 void WebSocketImpl::Send(bool fin,
 208                          WebSocket::MessageType type,
 209                          uint32_t num_bytes) {
 210   DCHECK(channel_);
 211   read_queue_->Read(num_bytes,
 212                     base::Bind(&WebSocketImpl::DidReadFromSendStream,
 213                                base::Unretained(this),
 214                                fin, type, num_bytes));
 215 }
 216
 217 void WebSocketImpl::FlowControl(int64_t quota) {
 218   DCHECK(channel_);
 219   channel_->SendFlowControl(quota);
 220 }
 221
 222 void WebSocketImpl::Close(uint16_t code, const String& reason) {
 223   DCHECK(channel_);
 224   channel_->StartClosingHandshake(code, reason);
 225 }
 226
 227 void WebSocketImpl::DidReadFromSendStream(bool fin,
 228                                           WebSocket::MessageType type,
 229                                           uint32_t num_bytes,
 230                                           const char* data) {
 231   std::vector<char> buffer(num_bytes);
 232   memcpy(&buffer[0], data, num_bytes);
 233   DCHECK(channel_);
 234   channel_->SendFrame(
 235       fin, ConvertTo<net::WebSocketFrameHeader::OpCode>(type), buffer);
 236 }
 237
 238 }  // namespace mojo