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org.eclipse.jetty.websocket.WebSocketConnectionD08 Maven / Gradle / Ivy
// ========================================================================
// Copyright (c) 2010 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
package org.eclipse.jetty.websocket;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.util.Collections;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.io.AbstractConnection;
import org.eclipse.jetty.io.AsyncEndPoint;
import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.eclipse.jetty.io.Connection;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.io.nio.SelectChannelEndPoint;
import org.eclipse.jetty.util.B64Code;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.Utf8StringBuilder;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.websocket.WebSocket.OnBinaryMessage;
import org.eclipse.jetty.websocket.WebSocket.OnControl;
import org.eclipse.jetty.websocket.WebSocket.OnFrame;
import org.eclipse.jetty.websocket.WebSocket.OnTextMessage;
public class WebSocketConnectionD08 extends AbstractConnection implements WebSocketConnection
{
private static final Logger LOG = Log.getLogger(WebSocketConnectionD08.class);
final static byte OP_CONTINUATION = 0x00;
final static byte OP_TEXT = 0x01;
final static byte OP_BINARY = 0x02;
final static byte OP_EXT_DATA = 0x03;
final static byte OP_CONTROL = 0x08;
final static byte OP_CLOSE = 0x08;
final static byte OP_PING = 0x09;
final static byte OP_PONG = 0x0A;
final static byte OP_EXT_CTRL = 0x0B;
final static int CLOSE_NORMAL=1000;
final static int CLOSE_SHUTDOWN=1001;
final static int CLOSE_PROTOCOL=1002;
final static int CLOSE_BADDATA=1003;
final static int CLOSE_NOCODE=1005;
final static int CLOSE_NOCLOSE=1006;
final static int CLOSE_NOTUTF8=1007;
final static int FLAG_FIN=0x8;
final static int VERSION=8;
static boolean isLastFrame(byte flags)
{
return (flags&FLAG_FIN)!=0;
}
static boolean isControlFrame(byte opcode)
{
return (opcode&OP_CONTROL)!=0;
}
private final static byte[] MAGIC;
private final IdleCheck _idle;
private final List _extensions;
private final WebSocketParserD08 _parser;
private final WebSocketParser.FrameHandler _inbound;
private final WebSocketGeneratorD08 _generator;
private final WebSocketGenerator _outbound;
private final WebSocket _webSocket;
private final OnFrame _onFrame;
private final OnBinaryMessage _onBinaryMessage;
private final OnTextMessage _onTextMessage;
private final OnControl _onControl;
private final String _protocol;
private final int _draft;
private final ClassLoader _context;
private volatile int _closeCode;
private volatile String _closeMessage;
private volatile boolean _closedIn;
private volatile boolean _closedOut;
private int _maxTextMessageSize=-1;
private int _maxBinaryMessageSize=-1;
static
{
try
{
MAGIC="258EAFA5-E914-47DA-95CA-C5AB0DC85B11".getBytes(StringUtil.__ISO_8859_1);
}
catch (UnsupportedEncodingException e)
{
throw new RuntimeException(e);
}
}
private final WebSocketParser.FrameHandler _frameHandler= new WSFrameHandler();
private final WebSocket.FrameConnection _connection = new WSFrameConnection();
/* ------------------------------------------------------------ */
public WebSocketConnectionD08(WebSocket websocket, EndPoint endpoint, WebSocketBuffers buffers, long timestamp, int maxIdleTime, String protocol, List extensions,int draft)
throws IOException
{
this(websocket,endpoint,buffers,timestamp,maxIdleTime,protocol,extensions,draft,null);
}
/* ------------------------------------------------------------ */
public WebSocketConnectionD08(WebSocket websocket, EndPoint endpoint, WebSocketBuffers buffers, long timestamp, int maxIdleTime, String protocol, List extensions,int draft, MaskGen maskgen)
throws IOException
{
super(endpoint,timestamp);
_context=Thread.currentThread().getContextClassLoader();
if (endpoint instanceof AsyncEndPoint)
((AsyncEndPoint)endpoint).cancelIdle();
_draft=draft;
_endp.setMaxIdleTime(maxIdleTime);
_webSocket = websocket;
_onFrame=_webSocket instanceof OnFrame ? (OnFrame)_webSocket : null;
_onTextMessage=_webSocket instanceof OnTextMessage ? (OnTextMessage)_webSocket : null;
_onBinaryMessage=_webSocket instanceof OnBinaryMessage ? (OnBinaryMessage)_webSocket : null;
_onControl=_webSocket instanceof OnControl ? (OnControl)_webSocket : null;
_generator = new WebSocketGeneratorD08(buffers, _endp,maskgen);
_extensions=extensions;
if (_extensions!=null)
{
int e=0;
for (Extension extension : _extensions)
{
extension.bind(
_connection,
e==extensions.size()-1?_frameHandler:extensions.get(e+1),
e==0?_generator:extensions.get(e-1));
e++;
}
}
_outbound=(_extensions==null||_extensions.size()==0)?_generator:extensions.get(extensions.size()-1);
_inbound=(_extensions==null||_extensions.size()==0)?_frameHandler:extensions.get(0);
_parser = new WebSocketParserD08(buffers, endpoint,_inbound,maskgen==null);
_protocol=protocol;
if (_endp instanceof SelectChannelEndPoint)
{
final SelectChannelEndPoint scep=(SelectChannelEndPoint)_endp;
scep.cancelIdle();
_idle=new IdleCheck()
{
public void access(EndPoint endp)
{
scep.scheduleIdle();
}
};
scep.scheduleIdle();
}
else
{
_idle = new IdleCheck()
{
public void access(EndPoint endp)
{}
};
}
}
/* ------------------------------------------------------------ */
public WebSocket.Connection getConnection()
{
return _connection;
}
/* ------------------------------------------------------------ */
public List getExtensions()
{
if (_extensions==null)
return Collections.emptyList();
return _extensions;
}
/* ------------------------------------------------------------ */
public Connection handle() throws IOException
{
Thread current = Thread.currentThread();
ClassLoader oldcontext = current.getContextClassLoader();
current.setContextClassLoader(_context);
try
{
// handle the framing protocol
boolean progress=true;
while (progress)
{
int flushed=_generator.flushBuffer();
int filled=_parser.parseNext();
progress = flushed>0 || filled>0;
if (filled<0 || flushed<0)
{
_endp.close();
break;
}
}
}
catch(IOException e)
{
try
{
_endp.close();
}
catch(IOException e2)
{
LOG.ignore(e2);
}
throw e;
}
finally
{
current.setContextClassLoader(oldcontext);
_parser.returnBuffer();
_generator.returnBuffer();
if (_endp.isOpen())
{
_idle.access(_endp);
if (_closedIn && _closedOut && _outbound.isBufferEmpty())
_endp.close();
else if (_endp.isInputShutdown() && !_closedIn)
closeIn(CLOSE_NOCLOSE,null);
else
checkWriteable();
}
}
return this;
}
/* ------------------------------------------------------------ */
public boolean isIdle()
{
return _parser.isBufferEmpty() && _outbound.isBufferEmpty();
}
/* ------------------------------------------------------------ */
@Override
public void idleExpired()
{
long idle = System.currentTimeMillis()-((SelectChannelEndPoint)_endp).getIdleTimestamp();
closeOut(WebSocketConnectionD08.CLOSE_NORMAL,"Idle for "+idle+"ms > "+_endp.getMaxIdleTime()+"ms");
}
/* ------------------------------------------------------------ */
public boolean isSuspended()
{
return false;
}
/* ------------------------------------------------------------ */
public void closed()
{
final boolean closed;
synchronized (this)
{
closed=_closeCode==0;
if (closed)
_closeCode=WebSocketConnectionD08.CLOSE_NOCLOSE;
}
if (closed)
_webSocket.onClose(WebSocketConnectionD08.CLOSE_NOCLOSE,"closed");
}
/* ------------------------------------------------------------ */
public void closeIn(int code,String message)
{
LOG.debug("ClosedIn {} {}",this,message);
final boolean closedOut;
final boolean closed;
synchronized (this)
{
closedOut=_closedOut;
_closedIn=true;
closed=_closeCode==0;
if (closed)
{
_closeCode=code;
_closeMessage=message;
}
}
try
{
if (closed)
_webSocket.onClose(code,message);
}
finally
{
try
{
if (closedOut)
_endp.close();
else
closeOut(code,message);
}
catch(IOException e)
{
LOG.ignore(e);
}
}
}
/* ------------------------------------------------------------ */
public void closeOut(int code,String message)
{
LOG.debug("ClosedOut {} {}",this,message);
final boolean close;
final boolean closed;
synchronized (this)
{
close=_closedIn || _closedOut;
_closedOut=true;
closed=_closeCode==0;
if (closed)
{
_closeCode=code;
_closeMessage=message;
}
}
try
{
if (closed)
_webSocket.onClose(code,message);
}
finally
{
try
{
if (close)
_endp.close();
else
{
if (code<=0)
code=WebSocketConnectionD08.CLOSE_NORMAL;
byte[] bytes = ("xx"+(message==null?"":message)).getBytes(StringUtil.__ISO_8859_1);
bytes[0]=(byte)(code/0x100);
bytes[1]=(byte)(code%0x100);
_outbound.addFrame((byte)FLAG_FIN,WebSocketConnectionD08.OP_CLOSE,bytes,0,bytes.length);
}
_outbound.flush();
}
catch(IOException e)
{
LOG.ignore(e);
}
}
}
/* ------------------------------------------------------------ */
public void fillBuffersFrom(Buffer buffer)
{
_parser.fill(buffer);
}
/* ------------------------------------------------------------ */
private void checkWriteable()
{
if (!_outbound.isBufferEmpty() && _endp instanceof AsyncEndPoint)
{
((AsyncEndPoint)_endp).scheduleWrite();
}
}
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
private class WSFrameConnection implements WebSocket.FrameConnection
{
volatile boolean _disconnecting;
/* ------------------------------------------------------------ */
public void sendMessage(String content) throws IOException
{
if (_closedOut)
throw new IOException("closedOut "+_closeCode+":"+_closeMessage);
byte[] data = content.getBytes(StringUtil.__UTF8);
_outbound.addFrame((byte)FLAG_FIN,WebSocketConnectionD08.OP_TEXT,data,0,data.length);
checkWriteable();
_idle.access(_endp);
}
/* ------------------------------------------------------------ */
public void sendMessage(byte[] content, int offset, int length) throws IOException
{
if (_closedOut)
throw new IOException("closedOut "+_closeCode+":"+_closeMessage);
_outbound.addFrame((byte)FLAG_FIN,WebSocketConnectionD08.OP_BINARY,content,offset,length);
checkWriteable();
_idle.access(_endp);
}
/* ------------------------------------------------------------ */
public void sendFrame(byte flags,byte opcode, byte[] content, int offset, int length) throws IOException
{
if (_closedOut)
throw new IOException("closedOut "+_closeCode+":"+_closeMessage);
_outbound.addFrame(flags,opcode,content,offset,length);
checkWriteable();
_idle.access(_endp);
}
/* ------------------------------------------------------------ */
public void sendControl(byte ctrl, byte[] data, int offset, int length) throws IOException
{
if (_closedOut)
throw new IOException("closedOut "+_closeCode+":"+_closeMessage);
_outbound.addFrame((byte)FLAG_FIN,ctrl,data,offset,length);
checkWriteable();
_idle.access(_endp);
}
/* ------------------------------------------------------------ */
public boolean isMessageComplete(byte flags)
{
return isLastFrame(flags);
}
/* ------------------------------------------------------------ */
public boolean isOpen()
{
return _endp!=null&&_endp.isOpen();
}
/* ------------------------------------------------------------ */
public void close(int code, String message)
{
if (_disconnecting)
return;
_disconnecting=true;
WebSocketConnectionD08.this.closeOut(code,message);
}
/* ------------------------------------------------------------ */
public void setMaxIdleTime(int ms)
{
try
{
_endp.setMaxIdleTime(ms);
}
catch(IOException e)
{
LOG.warn(e);
}
}
/* ------------------------------------------------------------ */
public void setMaxTextMessageSize(int size)
{
_maxTextMessageSize=size;
}
/* ------------------------------------------------------------ */
public void setMaxBinaryMessageSize(int size)
{
_maxBinaryMessageSize=size;
}
/* ------------------------------------------------------------ */
public int getMaxIdleTime()
{
return _endp.getMaxIdleTime();
}
/* ------------------------------------------------------------ */
public int getMaxTextMessageSize()
{
return _maxTextMessageSize;
}
/* ------------------------------------------------------------ */
public int getMaxBinaryMessageSize()
{
return _maxBinaryMessageSize;
}
/* ------------------------------------------------------------ */
public String getProtocol()
{
return _protocol;
}
/* ------------------------------------------------------------ */
public byte binaryOpcode()
{
return OP_BINARY;
}
/* ------------------------------------------------------------ */
public byte textOpcode()
{
return OP_TEXT;
}
/* ------------------------------------------------------------ */
public byte continuationOpcode()
{
return OP_CONTINUATION;
}
/* ------------------------------------------------------------ */
public byte finMask()
{
return FLAG_FIN;
}
/* ------------------------------------------------------------ */
public boolean isControl(byte opcode)
{
return isControlFrame(opcode);
}
/* ------------------------------------------------------------ */
public boolean isText(byte opcode)
{
return opcode==OP_TEXT;
}
/* ------------------------------------------------------------ */
public boolean isBinary(byte opcode)
{
return opcode==OP_BINARY;
}
/* ------------------------------------------------------------ */
public boolean isContinuation(byte opcode)
{
return opcode==OP_CONTINUATION;
}
/* ------------------------------------------------------------ */
public boolean isClose(byte opcode)
{
return opcode==OP_CLOSE;
}
/* ------------------------------------------------------------ */
public boolean isPing(byte opcode)
{
return opcode==OP_PING;
}
/* ------------------------------------------------------------ */
public boolean isPong(byte opcode)
{
return opcode==OP_PONG;
}
/* ------------------------------------------------------------ */
public void disconnect()
{
close(CLOSE_NORMAL,null);
}
/* ------------------------------------------------------------ */
public void setAllowFrameFragmentation(boolean allowFragmentation)
{
_parser.setFakeFragments(allowFragmentation);
}
/* ------------------------------------------------------------ */
public boolean isAllowFrameFragmentation()
{
return _parser.isFakeFragments();
}
/* ------------------------------------------------------------ */
@Override
public String toString()
{
return this.getClass().getSimpleName()+"D08@"+_endp.getLocalAddr()+":"+_endp.getLocalPort()+"<->"+_endp.getRemoteAddr()+":"+_endp.getRemotePort();
}
}
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
private class WSFrameHandler implements WebSocketParser.FrameHandler
{
private final Utf8StringBuilder _utf8 = new Utf8StringBuilder();
private ByteArrayBuffer _aggregate;
private byte _opcode=-1;
public void onFrame(final byte flags, final byte opcode, final Buffer buffer)
{
boolean lastFrame = isLastFrame(flags);
synchronized(WebSocketConnectionD08.this)
{
// Ignore incoming after a close
if (_closedIn)
return;
}
try
{
byte[] array=buffer.array();
// Deliver frame if websocket is a FrameWebSocket
if (_onFrame!=null)
{
if (_onFrame.onFrame(flags,opcode,array,buffer.getIndex(),buffer.length()))
return;
}
if (_onControl!=null && isControlFrame(opcode))
{
if (_onControl.onControl(opcode,array,buffer.getIndex(),buffer.length()))
return;
}
switch(opcode)
{
case WebSocketConnectionD08.OP_CONTINUATION:
{
// If text, append to the message buffer
if (_onTextMessage!=null && _opcode==WebSocketConnectionD08.OP_TEXT)
{
if (_utf8.append(buffer.array(),buffer.getIndex(),buffer.length(),_connection.getMaxTextMessageSize()))
{
// If this is the last fragment, deliver the text buffer
if (lastFrame)
{
_opcode=-1;
String msg =_utf8.toString();
_utf8.reset();
_onTextMessage.onMessage(msg);
}
}
else
textMessageTooLarge();
}
if (_opcode>=0 && _connection.getMaxBinaryMessageSize()>=0)
{
if (checkBinaryMessageSize(_aggregate.length(),buffer.length()))
{
_aggregate.put(buffer);
// If this is the last fragment, deliver
if (lastFrame && _onBinaryMessage!=null)
{
try
{
_onBinaryMessage.onMessage(_aggregate.array(),_aggregate.getIndex(),_aggregate.length());
}
finally
{
_opcode=-1;
_aggregate.clear();
}
}
}
}
break;
}
case WebSocketConnectionD08.OP_PING:
{
LOG.debug("PING {}",this);
if (!_closedOut)
_connection.sendControl(WebSocketConnectionD08.OP_PONG,buffer.array(),buffer.getIndex(),buffer.length());
break;
}
case WebSocketConnectionD08.OP_PONG:
{
LOG.debug("PONG {}",this);
break;
}
case WebSocketConnectionD08.OP_CLOSE:
{
int code=WebSocketConnectionD08.CLOSE_NOCODE;
String message=null;
if (buffer.length()>=2)
{
code=buffer.array()[buffer.getIndex()]*0x100+buffer.array()[buffer.getIndex()+1];
if (buffer.length()>2)
message=new String(buffer.array(),buffer.getIndex()+2,buffer.length()-2,StringUtil.__UTF8);
}
closeIn(code,message);
break;
}
case WebSocketConnectionD08.OP_TEXT:
{
if(_onTextMessage!=null)
{
if (_connection.getMaxTextMessageSize()<=0)
{
// No size limit, so handle only final frames
if (lastFrame)
_onTextMessage.onMessage(buffer.toString(StringUtil.__UTF8));
else
{
LOG.warn("Frame discarded. Text aggregation disabled for {}",_endp);
_connection.close(WebSocketConnectionD08.CLOSE_BADDATA,"Text frame aggregation disabled");
}
}
// append bytes to message buffer (if they fit)
else if (_utf8.append(buffer.array(),buffer.getIndex(),buffer.length(),_connection.getMaxTextMessageSize()))
{
if (lastFrame)
{
String msg =_utf8.toString();
_utf8.reset();
_onTextMessage.onMessage(msg);
}
else
{
_opcode=WebSocketConnectionD08.OP_TEXT;
}
}
else
textMessageTooLarge();
}
break;
}
default:
{
if (_onBinaryMessage!=null && checkBinaryMessageSize(0,buffer.length()))
{
if (lastFrame)
{
_onBinaryMessage.onMessage(array,buffer.getIndex(),buffer.length());
}
else if (_connection.getMaxBinaryMessageSize()>=0)
{
_opcode=opcode;
if (_aggregate==null)
_aggregate=new ByteArrayBuffer(_connection.getMaxBinaryMessageSize());
_aggregate.put(buffer);
}
else
{
LOG.warn("Frame discarded. Binary aggregation disabed for {}",_endp);
_connection.close(WebSocketConnectionD08.CLOSE_BADDATA,"Binary frame aggregation disabled");
}
}
}
}
}
catch(ThreadDeath th)
{
throw th;
}
catch(Throwable th)
{
LOG.warn(th);
}
}
private boolean checkBinaryMessageSize(int bufferLen, int length)
{
int max = _connection.getMaxBinaryMessageSize();
if (max>0 && (bufferLen+length)>max)
{
LOG.warn("Binary message too large > {}B for {}",_connection.getMaxBinaryMessageSize(),_endp);
_connection.close(WebSocketConnectionD08.CLOSE_BADDATA,"Message size > "+_connection.getMaxBinaryMessageSize());
_opcode=-1;
if (_aggregate!=null)
_aggregate.clear();
return false;
}
return true;
}
private void textMessageTooLarge()
{
LOG.warn("Text message too large > {} chars for {}",_connection.getMaxTextMessageSize(),_endp);
_connection.close(WebSocketConnectionD08.CLOSE_BADDATA,"Text message size > "+_connection.getMaxTextMessageSize()+" chars");
_opcode=-1;
_utf8.reset();
}
public void close(int code,String message)
{
if (code!=CLOSE_NORMAL)
LOG.warn("Close: "+code+" "+message);
_connection.close(code,message);
}
@Override
public String toString()
{
return WebSocketConnectionD08.this.toString()+"FH";
}
}
/* ------------------------------------------------------------ */
private interface IdleCheck
{
void access(EndPoint endp);
}
/* ------------------------------------------------------------ */
public void handshake(HttpServletRequest request, HttpServletResponse response, String subprotocol) throws IOException
{
String key = request.getHeader("Sec-WebSocket-Key");
response.setHeader("Upgrade", "WebSocket");
response.addHeader("Connection","Upgrade");
response.addHeader("Sec-WebSocket-Accept",hashKey(key));
if (subprotocol!=null)
response.addHeader("Sec-WebSocket-Protocol",subprotocol);
for(Extension ext : _extensions)
response.addHeader("Sec-WebSocket-Extensions",ext.getParameterizedName());
response.sendError(101);
if (_onFrame!=null)
_onFrame.onHandshake(_connection);
_webSocket.onOpen(_connection);
}
/* ------------------------------------------------------------ */
public static String hashKey(String key)
{
try
{
MessageDigest md = MessageDigest.getInstance("SHA1");
md.update(key.getBytes("UTF-8"));
md.update(MAGIC);
return new String(B64Code.encode(md.digest()));
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
/* ------------------------------------------------------------ */
@Override
public String toString()
{
return "WS/D"+_draft+"-"+_endp;
}
}
