--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/websockets/WebSocket.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,301 @@
+/*
+ * 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 "ScriptExecutionContext.h"
+#include "StringBuilder.h"
+#include "ThreadableWebSocketChannel.h"
+#include "WebSocketChannel.h"
+#include <wtf/text/CString.h>
+#include <wtf/StdLibExtras.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());
+ 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());
+ 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());
+ 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());
+ m_state = CLOSED;
+ ec = SYNTAX_ERR;
+ return;
+ }
+ if (!portAllowed(url)) {
+ scriptExecutionContext()->addMessage(JSMessageSource, LogMessageType, ErrorMessageLevel, String::format("WebSocket port %d blocked", url.port()), 0, scriptExecutionContext()->securityOrigin()->toString());
+ 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()
+{
+ 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));
+ m_channel = 0;
+ if (hasPendingActivity())
+ ActiveDOMObject::unsetPendingActivity(this);
+}
+
+EventTargetData* WebSocket::eventTargetData()
+{
+ return &m_eventTargetData;
+}
+
+EventTargetData* WebSocket::ensureEventTargetData()
+{
+ return &m_eventTargetData;
+}
+
+} // namespace WebCore
+
+#endif