webkit/src/WebCore/websockets/WebSocketChannel.cpp - toolchain/benchmark - Git at Google

 /*
  * Copyright (C) 2009 Google Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"

 #if ENABLE(WEB_SOCKETS)

 #include "WebSocketChannel.h"

 #include "CString.h"
 #include "CookieJar.h"
 #include "Document.h"
 #include "Logging.h"
 #include "PlatformString.h"
 #include "ScriptExecutionContext.h"
 #include "SocketStreamError.h"
 #include "SocketStreamHandle.h"
 #include "StringHash.h"
 #include "WebSocketChannelClient.h"

 #include <wtf/Deque.h>
 #include <wtf/FastMalloc.h>
 #include <wtf/HashMap.h>

 namespace WebCore {

 WebSocketChannel::WebSocketChannel(ScriptExecutionContext* context, WebSocketChannelClient* client, const KURL& url, const String& protocol)
     : m_context(context)
     , m_client(client)
     , m_handshake(url, protocol, context)
     , m_buffer(0)
     , m_bufferSize(0)
     , m_unhandledBufferSize(0)
 {
 }

 WebSocketChannel::~WebSocketChannel()
 {
     fastFree(m_buffer);
 }

 void WebSocketChannel::connect()
 {
     LOG(Network, "WebSocketChannel %p connect", this);
     ASSERT(!m_handle.get());
     m_handshake.reset();
     ref();
     m_handle = SocketStreamHandle::create(m_handshake.url(), this);
 }

 bool WebSocketChannel::send(const String& msg)
 {
     LOG(Network, "WebSocketChannel %p send %s", this, msg.utf8().data());
     Vector<char> buf;
     buf.append('\0');  // frame type
     buf.append(msg.utf8().data(), msg.utf8().length());
     buf.append('\xff');  // frame end
     if (!m_handle.get()) {
         m_unhandledBufferSize += buf.size();
         return false;
     }
     return m_handle->send(buf.data(), buf.size());
 }

 unsigned long WebSocketChannel::bufferedAmount() const
 {
     LOG(Network, "WebSocketChannel %p bufferedAmount", this);
     if (!m_handle.get())
         return m_unhandledBufferSize;
     return m_handle->bufferedAmount();
 }

 void WebSocketChannel::close()
 {
     LOG(Network, "WebSocketChannel %p close", this);
     if (m_handle.get())
         m_handle->close();  // will call didClose()
 }

 void WebSocketChannel::disconnect()
 {
     LOG(Network, "WebSocketChannel %p disconnect", this);
     m_client = 0;
     if (m_handle.get())
         m_handle->close();
 }

 void WebSocketChannel::willOpenStream(SocketStreamHandle*, const KURL&)
 {
 }

 void WebSocketChannel::willSendData(SocketStreamHandle*, const char*, int)
 {
 }

 void WebSocketChannel::didOpen(SocketStreamHandle* handle)
 {
     LOG(Network, "WebSocketChannel %p didOpen", this);
     ASSERT(handle == m_handle.get());
     const CString& handshakeMessage = m_handshake.clientHandshakeMessage();
     if (!handle->send(handshakeMessage.data(), handshakeMessage.length())) {
         LOG(Network, "Error in sending handshake message.");
         handle->close();
     }
 }

 void WebSocketChannel::didClose(SocketStreamHandle* handle)
 {
     LOG(Network, "WebSocketChannel %p didClose", this);
     ASSERT(handle == m_handle.get() || !m_handle.get());
     if (m_handle.get()) {
         m_unhandledBufferSize = handle->bufferedAmount();
         WebSocketChannelClient* client = m_client;
         m_client = 0;
         m_handle = 0;
         if (client)
             client->didClose();
     }
     deref();
 }

 void WebSocketChannel::didReceiveData(SocketStreamHandle* handle, const char* data, int len)
 {
     LOG(Network, "WebSocketChannel %p didReceiveData %d", this, len);
     ASSERT(handle == m_handle.get());
     if (!appendToBuffer(data, len)) {
         handle->close();
         return;
     }
     if (!m_client) {
         handle->close();
         return;
     }
     if (m_handshake.mode() != WebSocketHandshake::Connected) {
         int headerLength = m_handshake.readServerHandshake(m_buffer, m_bufferSize);
         if (headerLength <= 0)
             return;
         switch (m_handshake.mode()) {
         case WebSocketHandshake::Connected:
             if (!m_handshake.serverSetCookie().isEmpty()) {
                 if (m_context->isDocument()) {
                     Document* document = static_cast<Document*>(m_context);
                     if (cookiesEnabled(document))
                         document->setCookie(m_handshake.serverSetCookie());
                 }
             }
             // FIXME: handle set-cookie2.
             LOG(Network, "WebSocketChannel %p connected", this);
             m_client->didConnect();
             break;
         default:
             LOG(Network, "WebSocketChannel %p connection failed", this);
             handle->close();
             return;
         }
         skipBuffer(headerLength);
         if (!m_buffer)
             return;
         LOG(Network, "remaining in read buf %ul", m_bufferSize);
     }

     const char* nextFrame = m_buffer;
     const char* p = m_buffer;
     const char* end = p + m_bufferSize;
     while (p < end) {
         unsigned char frameByte = static_cast<unsigned char>(*p++);
         if ((frameByte & 0x80) == 0x80) {
             int length = 0;
             while (p < end && (*p & 0x80) == 0x80) {
                 if (length > std::numeric_limits<int>::max() / 128) {
                     LOG(Network, "frame length overflow %d", length);
                     handle->close();
                     return;
                 }
                 length = length * 128 + (*p & 0x7f);
                 ++p;
             }
             if (p + length < end) {
                 p += length;
                 nextFrame = p;
             }
         } else {
             const char* msgStart = p;
             while (p < end && *p != '\xff')
                 ++p;
             if (p < end && *p == '\xff') {
                 if (frameByte == 0x00)
                     m_client->didReceiveMessage(String::fromUTF8(msgStart, p - msgStart));
                 ++p;
                 nextFrame = p;
             }
         }
     }
     skipBuffer(nextFrame - m_buffer);
 }

 void WebSocketChannel::didFail(SocketStreamHandle* handle, const SocketStreamError&)
 {
     LOG(Network, "WebSocketChannel %p didFail", this);
     ASSERT(handle == m_handle.get() || !m_handle.get());
     handle->close();
 }

 bool WebSocketChannel::appendToBuffer(const char* data, int len)
 {
     char* newBuffer = 0;
     if (tryFastMalloc(m_bufferSize + len).getValue(newBuffer)) {
         if (m_buffer)
             memcpy(newBuffer, m_buffer, m_bufferSize);
         memcpy(newBuffer + m_bufferSize, data, len);
         fastFree(m_buffer);
         m_buffer = newBuffer;
         m_bufferSize += len;
         return true;
     }
     LOG(Network, "Too long WebSocket frame %d", m_bufferSize + len);
     return false;
 }

 void WebSocketChannel::skipBuffer(int len)
 {
     ASSERT(len <= m_bufferSize);
     m_bufferSize -= len;
     if (!m_bufferSize) {
         fastFree(m_buffer);
         m_buffer = 0;
         return;
     }
     memmove(m_buffer, m_buffer + len, m_bufferSize);
 }

 }  // namespace WebCore

 #endif  // ENABLE(WEB_SOCKETS)
	/*
	* Copyright (C) 2009 Google Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above
	* copyright notice, this list of conditions and the following disclaimer
	* in the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"

	#if ENABLE(WEB_SOCKETS)

	#include "WebSocketChannel.h"

	#include "CString.h"
	#include "CookieJar.h"
	#include "Document.h"
	#include "Logging.h"
	#include "PlatformString.h"
	#include "ScriptExecutionContext.h"
	#include "SocketStreamError.h"
	#include "SocketStreamHandle.h"
	#include "StringHash.h"
	#include "WebSocketChannelClient.h"

	#include <wtf/Deque.h>
	#include <wtf/FastMalloc.h>
	#include <wtf/HashMap.h>

	namespace WebCore {

	WebSocketChannel::WebSocketChannel(ScriptExecutionContext* context, WebSocketChannelClient* client, const KURL& url, const String& protocol)
	: m_context(context)
	, m_client(client)
	, m_handshake(url, protocol, context)
	, m_buffer(0)
	, m_bufferSize(0)
	, m_unhandledBufferSize(0)
	{
	}

	WebSocketChannel::~WebSocketChannel()
	{
	fastFree(m_buffer);
	}

	void WebSocketChannel::connect()
	{
	LOG(Network, "WebSocketChannel %p connect", this);
	ASSERT(!m_handle.get());
	m_handshake.reset();
	ref();
	m_handle = SocketStreamHandle::create(m_handshake.url(), this);
	}

	bool WebSocketChannel::send(const String& msg)
	{
	LOG(Network, "WebSocketChannel %p send %s", this, msg.utf8().data());
	Vector<char> buf;
	buf.append('\0'); // frame type
	buf.append(msg.utf8().data(), msg.utf8().length());
	buf.append('\xff'); // frame end
	if (!m_handle.get()) {
	m_unhandledBufferSize += buf.size();
	return false;
	}
	return m_handle->send(buf.data(), buf.size());
	}

	unsigned long WebSocketChannel::bufferedAmount() const
	{
	LOG(Network, "WebSocketChannel %p bufferedAmount", this);
	if (!m_handle.get())
	return m_unhandledBufferSize;
	return m_handle->bufferedAmount();
	}

	void WebSocketChannel::close()
	{
	LOG(Network, "WebSocketChannel %p close", this);
	if (m_handle.get())
	m_handle->close(); // will call didClose()
	}

	void WebSocketChannel::disconnect()
	{
	LOG(Network, "WebSocketChannel %p disconnect", this);
	m_client = 0;
	if (m_handle.get())
	m_handle->close();
	}

	void WebSocketChannel::willOpenStream(SocketStreamHandle*, const KURL&)
	{
	}

	void WebSocketChannel::willSendData(SocketStreamHandle, const char, int)
	{
	}

	void WebSocketChannel::didOpen(SocketStreamHandle* handle)
	{
	LOG(Network, "WebSocketChannel %p didOpen", this);
	ASSERT(handle == m_handle.get());
	const CString& handshakeMessage = m_handshake.clientHandshakeMessage();
	if (!handle->send(handshakeMessage.data(), handshakeMessage.length())) {
	LOG(Network, "Error in sending handshake message.");
	handle->close();
	}
	}

	void WebSocketChannel::didClose(SocketStreamHandle* handle)
	{
	LOG(Network, "WebSocketChannel %p didClose", this);
	ASSERT(handle == m_handle.get() \|\| !m_handle.get());
	if (m_handle.get()) {
	m_unhandledBufferSize = handle->bufferedAmount();
	WebSocketChannelClient* client = m_client;
	m_client = 0;
	m_handle = 0;
	if (client)
	client->didClose();
	}
	deref();
	}

	void WebSocketChannel::didReceiveData(SocketStreamHandle* handle, const char* data, int len)
	{
	LOG(Network, "WebSocketChannel %p didReceiveData %d", this, len);
	ASSERT(handle == m_handle.get());
	if (!appendToBuffer(data, len)) {
	handle->close();
	return;
	}
	if (!m_client) {
	handle->close();
	return;
	}
	if (m_handshake.mode() != WebSocketHandshake::Connected) {
	int headerLength = m_handshake.readServerHandshake(m_buffer, m_bufferSize);
	if (headerLength <= 0)
	return;
	switch (m_handshake.mode()) {
	case WebSocketHandshake::Connected:
	if (!m_handshake.serverSetCookie().isEmpty()) {
	if (m_context->isDocument()) {
	Document* document = static_cast<Document*>(m_context);
	if (cookiesEnabled(document))
	document->setCookie(m_handshake.serverSetCookie());
	}
	}
	// FIXME: handle set-cookie2.
	LOG(Network, "WebSocketChannel %p connected", this);
	m_client->didConnect();
	break;
	default:
	LOG(Network, "WebSocketChannel %p connection failed", this);
	handle->close();
	return;
	}
	skipBuffer(headerLength);
	if (!m_buffer)
	return;
	LOG(Network, "remaining in read buf %ul", m_bufferSize);
	}

	const char* nextFrame = m_buffer;
	const char* p = m_buffer;
	const char* end = p + m_bufferSize;
	while (p < end) {
	unsigned char frameByte = static_cast<unsigned char>(*p++);
	if ((frameByte & 0x80) == 0x80) {
	int length = 0;
	while (p < end && (*p & 0x80) == 0x80) {
	if (length > std::numeric_limits<int>::max() / 128) {
	LOG(Network, "frame length overflow %d", length);
	handle->close();
	return;
	}
	length = length * 128 + (*p & 0x7f);
	++p;
	}
	if (p + length < end) {
	p += length;
	nextFrame = p;
	}
	} else {
	const char* msgStart = p;
	while (p < end && *p != '\xff')
	++p;
	if (p < end && *p == '\xff') {
	if (frameByte == 0x00)
	m_client->didReceiveMessage(String::fromUTF8(msgStart, p - msgStart));
	++p;
	nextFrame = p;
	}
	}
	}
	skipBuffer(nextFrame - m_buffer);
	}

	void WebSocketChannel::didFail(SocketStreamHandle* handle, const SocketStreamError&)
	{
	LOG(Network, "WebSocketChannel %p didFail", this);
	ASSERT(handle == m_handle.get() \|\| !m_handle.get());
	handle->close();
	}

	bool WebSocketChannel::appendToBuffer(const char* data, int len)
	{
	char* newBuffer = 0;
	if (tryFastMalloc(m_bufferSize + len).getValue(newBuffer)) {
	if (m_buffer)
	memcpy(newBuffer, m_buffer, m_bufferSize);
	memcpy(newBuffer + m_bufferSize, data, len);
	fastFree(m_buffer);
	m_buffer = newBuffer;
	m_bufferSize += len;
	return true;
	}
	LOG(Network, "Too long WebSocket frame %d", m_bufferSize + len);
	return false;
	}

	void WebSocketChannel::skipBuffer(int len)
	{
	ASSERT(len <= m_bufferSize);
	m_bufferSize -= len;
	if (!m_bufferSize) {
	fastFree(m_buffer);
	m_buffer = 0;
	return;
	}
	memmove(m_buffer, m_buffer + len, m_bufferSize);
	}

	} // namespace WebCore

	#endif // ENABLE(WEB_SOCKETS)