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// Copyright 2014 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 "mojo/services/network/web_socket_impl.h"
#include <stdint.h>
#include <utility>
#include "base/logging.h"
#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "mojo/message_pump/handle_watcher.h"
#include "mojo/services/network/network_context.h"
#include "mojo/services/network/public/cpp/web_socket_read_queue.h"
#include "mojo/services/network/public/cpp/web_socket_write_queue.h"
#include "net/websockets/websocket_channel.h"
#include "net/websockets/websocket_errors.h"
#include "net/websockets/websocket_event_interface.h"
#include "net/websockets/websocket_frame.h" // for WebSocketFrameHeader::OpCode
#include "net/websockets/websocket_handshake_request_info.h"
#include "net/websockets/websocket_handshake_response_info.h"
#include "url/origin.h"
namespace mojo {
template <>
struct TypeConverter<net::WebSocketFrameHeader::OpCode,
WebSocket::MessageType> {
static net::WebSocketFrameHeader::OpCode Convert(
WebSocket::MessageType type) {
DCHECK(type == WebSocket::MessageType::CONTINUATION ||
type == WebSocket::MessageType::TEXT ||
type == WebSocket::MessageType::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.
static_assert(static_cast<OpCode>(WebSocket::MessageType::CONTINUATION) ==
net::WebSocketFrameHeader::kOpCodeContinuation,
"enum values must match for opcode continuation");
static_assert(static_cast<OpCode>(WebSocket::MessageType::TEXT) ==
net::WebSocketFrameHeader::kOpCodeText,
"enum values must match for opcode text");
static_assert(static_cast<OpCode>(WebSocket::MessageType::BINARY) ==
net::WebSocketFrameHeader::kOpCodeBinary,
"enum values must match for opcode binary");
return static_cast<OpCode>(type);
}
};
template <>
struct TypeConverter<WebSocket::MessageType,
net::WebSocketFrameHeader::OpCode> {
static WebSocket::MessageType Convert(
net::WebSocketFrameHeader::OpCode type) {
DCHECK(type == net::WebSocketFrameHeader::kOpCodeContinuation ||
type == net::WebSocketFrameHeader::kOpCodeText ||
type == net::WebSocketFrameHeader::kOpCodeBinary);
return static_cast<WebSocket::MessageType>(type);
}
};
namespace {
typedef net::WebSocketEventInterface::ChannelState ChannelState;
struct WebSocketEventHandler : public net::WebSocketEventInterface {
public:
WebSocketEventHandler(WebSocketClientPtr client)
: client_(std::move(client)) {}
~WebSocketEventHandler() override {}
private:
// net::WebSocketEventInterface methods:
ChannelState OnAddChannelResponse(const std::string& selected_subprotocol,
const std::string& extensions) override;
ChannelState OnDataFrame(bool fin,
WebSocketMessageType type,
const std::vector<char>& data) override;
ChannelState OnClosingHandshake() override;
ChannelState OnFlowControl(int64_t quota) override;
ChannelState OnDropChannel(bool was_clean,
uint16_t code,
const std::string& reason) override;
ChannelState OnFailChannel(const std::string& message) override;
ChannelState OnStartOpeningHandshake(
scoped_ptr<net::WebSocketHandshakeRequestInfo> request) override;
ChannelState OnFinishOpeningHandshake(
scoped_ptr<net::WebSocketHandshakeResponseInfo> response) override;
ChannelState OnSSLCertificateError(
scoped_ptr<net::WebSocketEventInterface::SSLErrorCallbacks> callbacks,
const GURL& url,
const net::SSLInfo& ssl_info,
bool fatal) override;
// Called once we've written to |receive_stream_|.
void DidWriteToReceiveStream(bool fin,
net::WebSocketFrameHeader::OpCode type,
uint32_t num_bytes,
const char* buffer);
WebSocketClientPtr client_;
ScopedDataPipeProducerHandle receive_stream_;
scoped_ptr<WebSocketWriteQueue> write_queue_;
DISALLOW_COPY_AND_ASSIGN(WebSocketEventHandler);
};
ChannelState WebSocketEventHandler::OnAddChannelResponse(
const std::string& selected_protocol,
const std::string& extensions) {
DataPipe data_pipe;
receive_stream_ = std::move(data_pipe.producer_handle);
write_queue_.reset(new WebSocketWriteQueue(receive_stream_.get()));
client_->DidConnect(selected_protocol, extensions,
std::move(data_pipe.consumer_handle));
return WebSocketEventInterface::CHANNEL_ALIVE;
}
ChannelState WebSocketEventHandler::OnDataFrame(
bool fin,
net::WebSocketFrameHeader::OpCode type,
const std::vector<char>& data) {
uint32_t size = static_cast<uint32_t>(data.size());
write_queue_->Write(
&data[0], size,
base::Bind(&WebSocketEventHandler::DidWriteToReceiveStream,
base::Unretained(this),
fin, type, size));
return WebSocketEventInterface::CHANNEL_ALIVE;
}
ChannelState WebSocketEventHandler::OnClosingHandshake() {
return WebSocketEventInterface::CHANNEL_ALIVE;
}
ChannelState WebSocketEventHandler::OnFlowControl(int64_t quota) {
client_->DidReceiveFlowControl(quota);
return WebSocketEventInterface::CHANNEL_ALIVE;
}
ChannelState WebSocketEventHandler::OnDropChannel(bool was_clean,
uint16_t code,
const std::string& reason) {
client_->DidClose(was_clean, code, reason);
return WebSocketEventInterface::CHANNEL_DELETED;
}
ChannelState WebSocketEventHandler::OnFailChannel(const std::string& message) {
client_->DidFail(message);
return WebSocketEventInterface::CHANNEL_DELETED;
}
ChannelState WebSocketEventHandler::OnStartOpeningHandshake(
scoped_ptr<net::WebSocketHandshakeRequestInfo> request) {
return WebSocketEventInterface::CHANNEL_ALIVE;
}
ChannelState WebSocketEventHandler::OnFinishOpeningHandshake(
scoped_ptr<net::WebSocketHandshakeResponseInfo> response) {
return WebSocketEventInterface::CHANNEL_ALIVE;
}
ChannelState WebSocketEventHandler::OnSSLCertificateError(
scoped_ptr<net::WebSocketEventInterface::SSLErrorCallbacks> callbacks,
const GURL& url,
const net::SSLInfo& ssl_info,
bool fatal) {
client_->DidFail("SSL Error");
return WebSocketEventInterface::CHANNEL_DELETED;
}
void WebSocketEventHandler::DidWriteToReceiveStream(
bool fin,
net::WebSocketFrameHeader::OpCode type,
uint32_t num_bytes,
const char* buffer) {
client_->DidReceiveData(
fin, ConvertTo<WebSocket::MessageType>(type), num_bytes);
}
} // namespace mojo
WebSocketImpl::WebSocketImpl(NetworkContext* context,
scoped_ptr<mojo::AppRefCount> app_refcount,
InterfaceRequest<WebSocket> request)
: context_(context),
app_refcount_(std::move(app_refcount)),
binding_(this, std::move(request)) {}
WebSocketImpl::~WebSocketImpl() {
}
void WebSocketImpl::Connect(const String& url,
Array<String> protocols,
const String& origin,
ScopedDataPipeConsumerHandle send_stream,
WebSocketClientPtr client) {
DCHECK(!channel_);
send_stream_ = std::move(send_stream);
read_queue_.reset(new WebSocketReadQueue(send_stream_.get()));
scoped_ptr<net::WebSocketEventInterface> event_interface(
new WebSocketEventHandler(std::move(client)));
channel_.reset(new net::WebSocketChannel(std::move(event_interface),
context_->url_request_context()));
channel_->SendAddChannelRequest(GURL(url.get()),
protocols.To<std::vector<std::string>>(),
url::Origin(GURL(origin.get())));
}
void WebSocketImpl::Send(bool fin,
WebSocket::MessageType type,
uint32_t num_bytes) {
DCHECK(channel_);
read_queue_->Read(num_bytes,
base::Bind(&WebSocketImpl::DidReadFromSendStream,
base::Unretained(this),
fin, type, num_bytes));
}
void WebSocketImpl::FlowControl(int64_t quota) {
DCHECK(channel_);
channel_->SendFlowControl(quota);
}
void WebSocketImpl::Close(uint16_t code, const String& reason) {
DCHECK(channel_);
channel_->StartClosingHandshake(code, reason);
}
void WebSocketImpl::DidReadFromSendStream(bool fin,
WebSocket::MessageType type,
uint32_t num_bytes,
const char* data) {
std::vector<char> buffer(num_bytes);
memcpy(&buffer[0], data, num_bytes);
DCHECK(channel_);
channel_->SendFrame(
fin, ConvertTo<net::WebSocketFrameHeader::OpCode>(type), buffer);
}
} // namespace mojo
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