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/network/public/cpp/web_socket_read_queue.h"
  12 #include "mojo/services/network/public/cpp/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(const std::string& selected_subprotocol,
  73                                     const std::string& extensions) override;
  74   ChannelState OnDataFrame(bool fin,
  75                            WebSocketMessageType type,
  76                            const std::vector<char>& data) override;
  77   ChannelState OnClosingHandshake() override;
  78   ChannelState OnFlowControl(int64 quota) override;
  79   ChannelState OnDropChannel(bool was_clean,
  80                              uint16 code,
  81                              const std::string& reason) override;
  82   ChannelState OnFailChannel(const std::string& message) override;
  83   ChannelState OnStartOpeningHandshake(
  84       scoped_ptr<net::WebSocketHandshakeRequestInfo> request) override;
  85   ChannelState OnFinishOpeningHandshake(
  86       scoped_ptr<net::WebSocketHandshakeResponseInfo> response) override;
  87   ChannelState OnSSLCertificateError(
  88       scoped_ptr<net::WebSocketEventInterface::SSLErrorCallbacks> callbacks,
  89       const GURL& url,
  90       const net::SSLInfo& ssl_info,
  91       bool fatal) override;
  92
  93   // Called once we've written to |receive_stream_|.
  94   void DidWriteToReceiveStream(bool fin,
  95                                net::WebSocketFrameHeader::OpCode type,
  96                                uint32_t num_bytes,
  97                                const char* buffer);
  98   WebSocketClientPtr client_;
  99   ScopedDataPipeProducerHandle receive_stream_;
 100   scoped_ptr<WebSocketWriteQueue> write_queue_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(WebSocketEventHandler);
 103 };
 104
 105 ChannelState WebSocketEventHandler::OnAddChannelResponse(
 106     const std::string& selected_protocol,
 107     const std::string& extensions) {
 108   DataPipe data_pipe;
 109   receive_stream_ = data_pipe.producer_handle.Pass();
 110   write_queue_.reset(new WebSocketWriteQueue(receive_stream_.get()));
 111   client_->DidConnect(
 112       selected_protocol, extensions, data_pipe.consumer_handle.Pass());
 113   return WebSocketEventInterface::CHANNEL_ALIVE;
 114 }
 115
 116 ChannelState WebSocketEventHandler::OnDataFrame(
 117     bool fin,
 118     net::WebSocketFrameHeader::OpCode type,
 119     const std::vector<char>& data) {
 120   uint32_t size = static_cast<uint32_t>(data.size());
 121   write_queue_->Write(
 122       &data[0], size,
 123       base::Bind(&WebSocketEventHandler::DidWriteToReceiveStream,
 124                  base::Unretained(this),
 125                  fin, type, size));
 126   return WebSocketEventInterface::CHANNEL_ALIVE;
 127 }
 128
 129 ChannelState WebSocketEventHandler::OnClosingHandshake() {
 130   return WebSocketEventInterface::CHANNEL_ALIVE;
 131 }
 132
 133 ChannelState WebSocketEventHandler::OnFlowControl(int64 quota) {
 134   client_->DidReceiveFlowControl(quota);
 135   return WebSocketEventInterface::CHANNEL_ALIVE;
 136 }
 137
 138 ChannelState WebSocketEventHandler::OnDropChannel(bool was_clean,
 139                                                   uint16 code,
 140                                                   const std::string& reason) {
 141   client_->DidClose(was_clean, code, reason);
 142   return WebSocketEventInterface::CHANNEL_DELETED;
 143 }
 144
 145 ChannelState WebSocketEventHandler::OnFailChannel(const std::string& message) {
 146   client_->DidFail(message);
 147   return WebSocketEventInterface::CHANNEL_DELETED;
 148 }
 149
 150 ChannelState WebSocketEventHandler::OnStartOpeningHandshake(
 151     scoped_ptr<net::WebSocketHandshakeRequestInfo> request) {
 152   return WebSocketEventInterface::CHANNEL_ALIVE;
 153 }
 154
 155 ChannelState WebSocketEventHandler::OnFinishOpeningHandshake(
 156     scoped_ptr<net::WebSocketHandshakeResponseInfo> response) {
 157   return WebSocketEventInterface::CHANNEL_ALIVE;
 158 }
 159
 160 ChannelState WebSocketEventHandler::OnSSLCertificateError(
 161     scoped_ptr<net::WebSocketEventInterface::SSLErrorCallbacks> callbacks,
 162     const GURL& url,
 163     const net::SSLInfo& ssl_info,
 164     bool fatal) {
 165   client_->DidFail("SSL Error");
 166   return WebSocketEventInterface::CHANNEL_DELETED;
 167 }
 168
 169 void WebSocketEventHandler::DidWriteToReceiveStream(
 170     bool fin,
 171     net::WebSocketFrameHeader::OpCode type,
 172     uint32_t num_bytes,
 173     const char* buffer) {
 174   client_->DidReceiveData(
 175       fin, ConvertTo<WebSocket::MessageType>(type), num_bytes);
 176 }
 177
 178 }  // namespace mojo
 179
 180 WebSocketImpl::WebSocketImpl(
 181     NetworkContext* context,
 182     scoped_ptr<mojo::AppRefCount> app_refcount,
 183     InterfaceRequest<WebSocket> request)
 184     : context_(context), app_refcount_(app_refcount.Pass()),
 185       binding_(this, request.Pass()) {
 186 }
 187
 188 WebSocketImpl::~WebSocketImpl() {
 189 }
 190
 191 void WebSocketImpl::Connect(const String& url,
 192                             Array<String> protocols,
 193                             const String& origin,
 194                             ScopedDataPipeConsumerHandle send_stream,
 195                             WebSocketClientPtr client) {
 196   DCHECK(!channel_);
 197   send_stream_ = send_stream.Pass();
 198   read_queue_.reset(new WebSocketReadQueue(send_stream_.get()));
 199   scoped_ptr<net::WebSocketEventInterface> event_interface(
 200       new WebSocketEventHandler(client.Pass()));
 201   channel_.reset(new net::WebSocketChannel(event_interface.Pass(),
 202                                            context_->url_request_context()));
 203   channel_->SendAddChannelRequest(GURL(url.get()),
 204                                   protocols.To<std::vector<std::string>>(),
 205                                   url::Origin(GURL(origin.get())));
 206 }
 207
 208 void WebSocketImpl::Send(bool fin,
 209                          WebSocket::MessageType type,
 210                          uint32_t num_bytes) {
 211   DCHECK(channel_);
 212   read_queue_->Read(num_bytes,
 213                     base::Bind(&WebSocketImpl::DidReadFromSendStream,
 214                                base::Unretained(this),
 215                                fin, type, num_bytes));
 216 }
 217
 218 void WebSocketImpl::FlowControl(int64_t quota) {
 219   DCHECK(channel_);
 220   channel_->SendFlowControl(quota);
 221 }
 222
 223 void WebSocketImpl::Close(uint16_t code, const String& reason) {
 224   DCHECK(channel_);
 225   channel_->StartClosingHandshake(code, reason);
 226 }
 227
 228 void WebSocketImpl::DidReadFromSendStream(bool fin,
 229                                           WebSocket::MessageType type,
 230                                           uint32_t num_bytes,
 231                                           const char* data) {
 232   std::vector<char> buffer(num_bytes);
 233   memcpy(&buffer[0], data, num_bytes);
 234   DCHECK(channel_);
 235   channel_->SendFrame(
 236       fin, ConvertTo<net::WebSocketFrameHeader::OpCode>(type), buffer);
 237 }
 238
 239 }  // namespace mojo