1 files changed, 306 insertions, 0 deletions
diff --git a/Source/WebCore/websockets/WebSocket.cpp b/Source/WebCore/websockets/WebSocket.cpp
new file mode 100644
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+++ b/Source/WebCore/websockets/WebSocket.cpp
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+/*
+ * 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 "WebSocket.h"
+
+#include "DOMWindow.h"
+#include "Event.h"
+#include "EventException.h"
+#include "EventListener.h"
+#include "EventNames.h"
+#include "Logging.h"
+#include "MessageEvent.h"
+#include "ScriptCallStack.h"
+#include "ScriptExecutionContext.h"
+#include "ThreadableWebSocketChannel.h"
+#include "WebSocketChannel.h"
+#include <wtf/StdLibExtras.h>
+#include <wtf/text/CString.h>
+#include <wtf/text/StringBuilder.h>
+#include <wtf/text/StringConcatenate.h>
+
+namespace WebCore {
+
+static bool isValidProtocolString(const String& protocol)
+{
+    if (protocol.isNull())
+        return true;
+    if (protocol.isEmpty())
+        return false;
+    const UChar* characters = protocol.characters();
+    for (size_t i = 0; i < protocol.length(); i++) {
+        if (characters[i] < 0x20 || characters[i] > 0x7E)
+            return false;
+    }
+    return true;
+}
+
+static String encodeProtocolString(const String& protocol)
+{
+    StringBuilder builder;
+    for (size_t i = 0; i < protocol.length(); i++) {
+        if (protocol[i] < 0x20 || protocol[i] > 0x7E)
+            builder.append(String::format("\\u%04X", protocol[i]));
+        else if (protocol[i] == 0x5c)
+            builder.append("\\\\");
+        else
+            builder.append(protocol[i]);
+    }
+    return builder.toString();
+}
+
+static bool webSocketsAvailable = false;
+
+void WebSocket::setIsAvailable(bool available)
+{
+    webSocketsAvailable = available;
+}
+
+bool WebSocket::isAvailable()
+{
+    return webSocketsAvailable;
+}
+
+WebSocket::WebSocket(ScriptExecutionContext* context)
+    : ActiveDOMObject(context, this)
+    , m_state(CONNECTING)
+    , m_bufferedAmountAfterClose(0)
+{
+}
+
+WebSocket::~WebSocket()
+{
+    if (m_channel)
+        m_channel->disconnect();
+}
+
+void WebSocket::connect(const KURL& url, ExceptionCode& ec)
+{
+    connect(url, String(), ec);
+}
+
+void WebSocket::connect(const KURL& url, const String& protocol, ExceptionCode& ec)
+{
+    LOG(Network, "WebSocket %p connect to %s protocol=%s", this, url.string().utf8().data(), protocol.utf8().data());
+    m_url = url;
+    m_protocol = protocol;
+
+    if (!m_url.isValid()) {
+        scriptExecutionContext()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "Invalid url for WebSocket " + url.string(), 0, scriptExecutionContext()->securityOrigin()->toString(), 0);
+        m_state = CLOSED;
+        ec = SYNTAX_ERR;
+        return;
+    }
+
+    if (!m_url.protocolIs("ws") && !m_url.protocolIs("wss")) {
+        scriptExecutionContext()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "Wrong url scheme for WebSocket " + url.string(), 0, scriptExecutionContext()->securityOrigin()->toString(), 0);
+        m_state = CLOSED;
+        ec = SYNTAX_ERR;
+        return;
+    }
+    if (m_url.hasFragmentIdentifier()) {
+        scriptExecutionContext()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "URL has fragment component " + url.string(), 0, scriptExecutionContext()->securityOrigin()->toString(), 0);
+        m_state = CLOSED;
+        ec = SYNTAX_ERR;
+        return;
+    }
+    if (!isValidProtocolString(m_protocol)) {
+        scriptExecutionContext()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, "Wrong protocol for WebSocket '" + encodeProtocolString(m_protocol) + "'", 0, scriptExecutionContext()->securityOrigin()->toString(), 0);
+        m_state = CLOSED;
+        ec = SYNTAX_ERR;
+        return;
+    }
+    if (!portAllowed(url)) {
+        scriptExecutionContext()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, makeString("WebSocket port ", String::number(url.port()), " blocked"), 0, scriptExecutionContext()->securityOrigin()->toString(), 0);
+        m_state = CLOSED;
+        ec = SECURITY_ERR;
+        return;
+    }
+
+    m_channel = ThreadableWebSocketChannel::create(scriptExecutionContext(), this, m_url, m_protocol);
+    m_channel->connect();
+    ActiveDOMObject::setPendingActivity(this);
+}
+
+bool WebSocket::send(const String& message, ExceptionCode& ec)
+{
+    LOG(Network, "WebSocket %p send %s", this, message.utf8().data());
+    if (m_state == CONNECTING) {
+        ec = INVALID_STATE_ERR;
+        return false;
+    }
+    // No exception is raised if the connection was once established but has subsequently been closed.
+    if (m_state == CLOSED) {
+        m_bufferedAmountAfterClose += message.utf8().length() + 2; // 2 for frameing
+        return false;
+    }
+    // FIXME: check message is valid utf8.
+    ASSERT(m_channel);
+    return m_channel->send(message);
+}
+
+void WebSocket::close()
+{
+    LOG(Network, "WebSocket %p close", this);
+    if (m_state == CLOSED)
+        return;
+    m_state = CLOSED;
+    m_bufferedAmountAfterClose = m_channel->bufferedAmount();
+    // didClose notification may be already queued, which we will inadvertently process while waiting for bufferedAmount() to return.
+    // In this case m_channel will be set to null during didClose() call, thus we need to test validness of m_channel here.
+    if (m_channel)
+        m_channel->close();
+}
+
+const KURL& WebSocket::url() const
+{
+    return m_url;
+}
+
+WebSocket::State WebSocket::readyState() const
+{
+    return m_state;
+}
+
+unsigned long WebSocket::bufferedAmount() const
+{
+    if (m_state == OPEN)
+        return m_channel->bufferedAmount();
+    return m_bufferedAmountAfterClose;
+}
+
+ScriptExecutionContext* WebSocket::scriptExecutionContext() const
+{
+    return ActiveDOMObject::scriptExecutionContext();
+}
+
+void WebSocket::contextDestroyed()
+{
+    LOG(Network, "WebSocket %p scriptExecutionContext destroyed", this);
+    ASSERT(!m_channel);
+    ASSERT(m_state == CLOSED);
+    ActiveDOMObject::contextDestroyed();
+}
+
+bool WebSocket::canSuspend() const
+{
+    return !m_channel;
+}
+
+void WebSocket::suspend(ReasonForSuspension)
+{
+    if (m_channel)
+        m_channel->suspend();
+}
+
+void WebSocket::resume()
+{
+    if (m_channel)
+        m_channel->resume();
+}
+
+void WebSocket::stop()
+{
+    bool pending = hasPendingActivity();
+    if (m_channel)
+        m_channel->disconnect();
+    m_channel = 0;
+    m_state = CLOSED;
+    ActiveDOMObject::stop();
+    if (pending)
+        ActiveDOMObject::unsetPendingActivity(this);
+}
+
+void WebSocket::didConnect()
+{
+    LOG(Network, "WebSocket %p didConnect", this);
+    if (m_state != CONNECTING) {
+        didClose(0);
+        return;
+    }
+    ASSERT(scriptExecutionContext());
+    m_state = OPEN;
+    dispatchEvent(Event::create(eventNames().openEvent, false, false));
+}
+
+void WebSocket::didReceiveMessage(const String& msg)
+{
+    LOG(Network, "WebSocket %p didReceiveMessage %s", this, msg.utf8().data());
+    if (m_state != OPEN)
+        return;
+    ASSERT(scriptExecutionContext());
+    RefPtr<MessageEvent> evt = MessageEvent::create();
+    evt->initMessageEvent(eventNames().messageEvent, false, false, SerializedScriptValue::create(msg), "", "", 0, 0);
+    dispatchEvent(evt);
+}
+
+void WebSocket::didReceiveMessageError()
+{
+    LOG(Network, "WebSocket %p didReceiveErrorMessage", this);
+    if (m_state != OPEN)
+        return;
+    ASSERT(scriptExecutionContext());
+    dispatchEvent(Event::create(eventNames().errorEvent, false, false));
+}
+
+void WebSocket::didClose(unsigned long unhandledBufferedAmount)
+{
+    LOG(Network, "WebSocket %p didClose", this);
+    if (!m_channel)
+        return;
+    m_state = CLOSED;
+    m_bufferedAmountAfterClose += unhandledBufferedAmount;
+    ASSERT(scriptExecutionContext());
+    dispatchEvent(Event::create(eventNames().closeEvent, false, false));
+    if (m_channel) {
+        m_channel->disconnect();
+        m_channel = 0;
+    }
+    if (hasPendingActivity())
+        ActiveDOMObject::unsetPendingActivity(this);
+}
+
+EventTargetData* WebSocket::eventTargetData()
+{
+    return &m_eventTargetData;
+}
+
+EventTargetData* WebSocket::ensureEventTargetData()
+{
+    return &m_eventTargetData;
+}
+
+}  // namespace WebCore
+
+#endif