--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/websockets/WebSocketChannel.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,333 @@
+/*
+ * 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 "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 "WebSocketHandshake.h"
+
+#include <wtf/text/CString.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_resumeTimer(this, &WebSocketChannel::resumeTimerFired)
+ , m_suspended(false)
+ , m_closed(false)
+ , m_unhandledBufferedAmount(0)
+{
+}
+
+WebSocketChannel::~WebSocketChannel()
+{
+ fastFree(m_buffer);
+}
+
+void WebSocketChannel::connect()
+{
+ LOG(Network, "WebSocketChannel %p connect", this);
+ ASSERT(!m_handle);
+ ASSERT(!m_suspended);
+ 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());
+ ASSERT(m_handle);
+ ASSERT(!m_suspended);
+ Vector<char> buf;
+ buf.append('\0'); // frame type
+ buf.append(msg.utf8().data(), msg.utf8().length());
+ buf.append('\xff'); // frame end
+ return m_handle->send(buf.data(), buf.size());
+}
+
+unsigned long WebSocketChannel::bufferedAmount() const
+{
+ LOG(Network, "WebSocketChannel %p bufferedAmount", this);
+ ASSERT(m_handle);
+ ASSERT(!m_suspended);
+ return m_handle->bufferedAmount();
+}
+
+void WebSocketChannel::close()
+{
+ LOG(Network, "WebSocketChannel %p close", this);
+ ASSERT(!m_suspended);
+ if (m_handle)
+ m_handle->close(); // will call didClose()
+}
+
+void WebSocketChannel::disconnect()
+{
+ LOG(Network, "WebSocketChannel %p disconnect", this);
+ m_handshake.clearScriptExecutionContext();
+ m_client = 0;
+ m_context = 0;
+ if (m_handle)
+ m_handle->close();
+}
+
+void WebSocketChannel::suspend()
+{
+ m_suspended = true;
+}
+
+void WebSocketChannel::resume()
+{
+ m_suspended = false;
+ if ((m_buffer || m_closed) && m_client && !m_resumeTimer.isActive())
+ m_resumeTimer.startOneShot(0);
+}
+
+void WebSocketChannel::didOpen(SocketStreamHandle* handle)
+{
+ LOG(Network, "WebSocketChannel %p didOpen", this);
+ ASSERT(handle == m_handle);
+ if (!m_context)
+ return;
+ const CString& handshakeMessage = m_handshake.clientHandshakeMessage();
+ if (!handle->send(handshakeMessage.data(), handshakeMessage.length())) {
+ m_context->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "Error sending handshake message.", 0, m_handshake.clientOrigin());
+ handle->close();
+ }
+}
+
+void WebSocketChannel::didClose(SocketStreamHandle* handle)
+{
+ LOG(Network, "WebSocketChannel %p didClose", this);
+ ASSERT_UNUSED(handle, handle == m_handle || !m_handle);
+ m_closed = true;
+ if (m_handle) {
+ m_unhandledBufferedAmount = m_handle->bufferedAmount();
+ if (m_suspended)
+ return;
+ WebSocketChannelClient* client = m_client;
+ m_client = 0;
+ m_context = 0;
+ m_handle = 0;
+ if (client)
+ client->didClose(m_unhandledBufferedAmount);
+ }
+ deref();
+}
+
+void WebSocketChannel::didReceiveData(SocketStreamHandle* handle, const char* data, int len)
+{
+ LOG(Network, "WebSocketChannel %p didReceiveData %d", this, len);
+ RefPtr<WebSocketChannel> protect(this); // The client can close the channel, potentially removing the last reference.
+ ASSERT(handle == m_handle);
+ if (!m_context) {
+ return;
+ }
+ if (!m_client) {
+ handle->close();
+ return;
+ }
+ if (!appendToBuffer(data, len)) {
+ handle->close();
+ return;
+ }
+ while (!m_suspended && m_client && m_buffer)
+ if (!processBuffer())
+ break;
+}
+
+void WebSocketChannel::didFail(SocketStreamHandle* handle, const SocketStreamError&)
+{
+ LOG(Network, "WebSocketChannel %p didFail", this);
+ ASSERT(handle == m_handle || !m_handle);
+ handle->close();
+}
+
+void WebSocketChannel::didReceiveAuthenticationChallenge(SocketStreamHandle*, const AuthenticationChallenge&)
+{
+}
+
+void WebSocketChannel::didCancelAuthenticationChallenge(SocketStreamHandle*, const AuthenticationChallenge&)
+{
+}
+
+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;
+ }
+ m_context->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, String::format("WebSocket frame (at %d bytes) is too long.", m_bufferSize + len), 0, m_handshake.clientOrigin());
+ 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);
+}
+
+bool WebSocketChannel::processBuffer()
+{
+ ASSERT(!m_suspended);
+ ASSERT(m_client);
+ ASSERT(m_buffer);
+
+ if (m_handshake.mode() == WebSocketHandshake::Incomplete) {
+ int headerLength = m_handshake.readServerHandshake(m_buffer, m_bufferSize);
+ if (headerLength <= 0)
+ return false;
+ if (m_handshake.mode() == WebSocketHandshake::Connected) {
+ if (!m_handshake.serverSetCookie().isEmpty()) {
+ if (m_context->isDocument()) {
+ Document* document = static_cast<Document*>(m_context);
+ if (cookiesEnabled(document)) {
+ ExceptionCode ec; // Exception (for sandboxed documents) ignored.
+ document->setCookie(m_handshake.serverSetCookie(), ec);
+ }
+ }
+ }
+ // FIXME: handle set-cookie2.
+ LOG(Network, "WebSocketChannel %p connected", this);
+ skipBuffer(headerLength);
+ m_client->didConnect();
+ LOG(Network, "remaining in read buf %ul", m_bufferSize);
+ return m_buffer;
+ }
+ LOG(Network, "WebSocketChannel %p connection failed", this);
+ skipBuffer(headerLength);
+ if (!m_closed)
+ m_handle->close();
+ return false;
+ }
+ if (m_handshake.mode() != WebSocketHandshake::Connected)
+ return false;
+
+ const char* nextFrame = m_buffer;
+ const char* p = m_buffer;
+ const char* end = p + m_bufferSize;
+
+ unsigned char frameByte = static_cast<unsigned char>(*p++);
+ if ((frameByte & 0x80) == 0x80) {
+ int length = 0;
+ while (p < end) {
+ if (length > std::numeric_limits<int>::max() / 128) {
+ LOG(Network, "frame length overflow %d", length);
+ skipBuffer(p + length - m_buffer);
+ m_client->didReceiveMessageError();
+ if (!m_client)
+ return false;
+ if (!m_closed)
+ m_handle->close();
+ return false;
+ }
+ char msgByte = *p;
+ length = length * 128 + (msgByte & 0x7f);
+ ++p;
+ if (!(msgByte & 0x80))
+ break;
+ }
+ if (p + length < end) {
+ p += length;
+ nextFrame = p;
+ skipBuffer(nextFrame - m_buffer);
+ m_client->didReceiveMessageError();
+ return m_buffer;
+ }
+ return false;
+ }
+
+ const char* msgStart = p;
+ while (p < end && *p != '\xff')
+ ++p;
+ if (p < end && *p == '\xff') {
+ int msgLength = p - msgStart;
+ ++p;
+ nextFrame = p;
+ if (frameByte == 0x00) {
+ String msg = String::fromUTF8(msgStart, msgLength);
+ skipBuffer(nextFrame - m_buffer);
+ m_client->didReceiveMessage(msg);
+ } else {
+ skipBuffer(nextFrame - m_buffer);
+ m_client->didReceiveMessageError();
+ }
+ return m_buffer;
+ }
+ return false;
+}
+
+void WebSocketChannel::resumeTimerFired(Timer<WebSocketChannel>* timer)
+{
+ ASSERT_UNUSED(timer, timer == &m_resumeTimer);
+
+ RefPtr<WebSocketChannel> protect(this); // The client can close the channel, potentially removing the last reference.
+ while (!m_suspended && m_client && m_buffer)
+ if (!processBuffer())
+ break;
+ if (!m_suspended && m_client && m_closed && m_handle)
+ didClose(m_handle.get());
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_SOCKETS)