diff -r 000000000000 -r 4f2f89ce4247 WebCore/websockets/WebSocketChannel.cpp
--- /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)