/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.http;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.caucho.network.listen.SocketLinkDuplexController;
import com.caucho.network.listen.SocketLinkDuplexListener;
import com.caucho.remote.websocket.WebSocketConstants;
import com.caucho.remote.websocket.WebSocketInputStream;
import com.caucho.remote.websocket.WebSocketOutputStream;
import com.caucho.remote.websocket.WebSocketPrintWriter;
import com.caucho.remote.websocket.WebSocketReader;
import com.caucho.remote.websocket.WebSocketWriter;
import com.caucho.remote.websocket.FrameInputStream;
import com.caucho.util.L10N;
import com.caucho.vfs.ReadStream;
import com.caucho.vfs.TempBuffer;
import com.caucho.vfs.WriteStream;
import com.caucho.websocket.WebSocketContext;
import com.caucho.websocket.WebSocketListener;
/**
* User facade for http requests.
*/
class WebSocketContextImpl
implements WebSocketContext, WebSocketConstants, SocketLinkDuplexListener
{
private static final L10N L = new L10N(WebSocketContextImpl.class);
private static final Logger log
= Logger.getLogger(WebSocketContextImpl.class.getName());
private final HttpServletRequestImpl _request;
private final WebSocketListener _listener;
private SocketLinkDuplexController _controller;
private FrameInputStream _is;
private WebSocketOutputStream _binaryOut;
private WebSocketInputStream _binaryIn;
private WebSocketWriter _textOut;
private PrintWriter _textWriter;
private WebSocketReader _textIn;
private boolean _isReadClosed;
private AtomicBoolean _isWriteClosed = new AtomicBoolean();
WebSocketContextImpl(HttpServletRequestImpl request,
HttpServletResponseImpl response,
WebSocketListener listener,
FrameInputStream is)
{
_request = request;
_listener = listener;
_is = is;
}
public void setController(SocketLinkDuplexController controller)
{
_controller = controller;
_is.init(controller.getReadStream());
}
@Override
public void setTimeout(long timeout)
{
_controller.setIdleTimeMax(timeout);
}
@Override
public long getTimeout()
{
return _controller.getIdleTimeMax();
}
/*
@Override
public InputStream getInputStream()
throws IOException
{
return _controller.getReadStream();
}
*/
@Override
public OutputStream startBinaryMessage()
throws IOException
{
if (_isWriteClosed.get())
throw new IllegalStateException(L.l("{0} is closed for writing.",
this));
if (_binaryOut == null)
_binaryOut = new WebSocketOutputStream(_controller.getWriteStream(),
TempBuffer.allocate().getBuffer());
_binaryOut.init();
return _binaryOut;
}
@Override
public PrintWriter startTextMessage()
throws IOException
{
if (_textOut == null) {
_textOut = new WebSocketWriter(_controller.getWriteStream(),
TempBuffer.allocate().getBuffer());
_textWriter = new WebSocketPrintWriter(_textOut);
}
_textOut.init();
return _textWriter;
}
@Override
public void close()
{
if (_isWriteClosed.getAndSet(true))
return;
try {
WriteStream out = _controller.getWriteStream();
out.write(0x81);
out.write(0x00);
out.flush();
} catch (IOException e) {
log.log(Level.WARNING, e.toString(), e);
} finally {
disconnect();
}
}
@Override
public void disconnect()
{
_controller.complete();
}
//
// duplex callbacks
//
void onStart()
throws IOException
{
_listener.onStart(this);
}
void flush()
throws IOException
{
WriteStream out = _controller.getWriteStream();
out.flush();
}
@Override
public void onStart(SocketLinkDuplexController context)
throws IOException
{
}
@Override
public void onRead(SocketLinkDuplexController duplex)
throws IOException
{
do {
if (! readFrame())
return;
} while (_request.getAvailable() > 0);
}
private boolean readFrame()
throws IOException
{
if (! _is.readFrameHeader()) {
return false;
}
int opcode = _is.getOpcode();
switch (opcode) {
case OP_BINARY:
if (_binaryIn == null)
_binaryIn = createWebSocketInputStream(_is);
_binaryIn.init();
_listener.onReadBinary(this, _binaryIn);
break;
case OP_TEXT:
if (_textIn == null)
_textIn = new WebSocketReader(_is);
_textIn.init();
_listener.onReadText(this, _textIn);
break;
case OP_CLOSE:
_isReadClosed = true;
try {
_listener.onClose(this);
} finally {
close();
}
break;
default:
// XXX:
disconnect();
break;
}
return true;
}
protected WebSocketInputStream createWebSocketInputStream(FrameInputStream is)
throws IOException
{
return new WebSocketInputStream(is);
}
@Override
public void onDisconnect(SocketLinkDuplexController duplex)
throws IOException
{
_listener.onDisconnect(this);
}
@Override
public void onTimeout(SocketLinkDuplexController duplex)
throws IOException
{
_listener.onTimeout(this);
}
@Override
public String toString()
{
return getClass().getSimpleName() + "[" + _listener + "]";
}
}