--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/eclipse/jetty/server/handler/ConnectHandler.java	Wed Sep 07 21:15:48 2016 -0600
@@ -0,0 +1,1025 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2014 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.server.handler;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.SocketException;
+import java.net.SocketTimeoutException;
+import java.nio.channels.ClosedChannelException;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.SocketChannel;
+import java.util.Arrays;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.eclipse.jetty.http.HttpMethods;
+import org.eclipse.jetty.http.HttpParser;
+import org.eclipse.jetty.io.AsyncEndPoint;
+import org.eclipse.jetty.io.Buffer;
+import org.eclipse.jetty.io.ConnectedEndPoint;
+import org.eclipse.jetty.io.Connection;
+import org.eclipse.jetty.io.EndPoint;
+import org.eclipse.jetty.io.nio.AsyncConnection;
+import org.eclipse.jetty.io.nio.IndirectNIOBuffer;
+import org.eclipse.jetty.io.nio.SelectChannelEndPoint;
+import org.eclipse.jetty.io.nio.SelectorManager;
+import org.eclipse.jetty.server.AbstractHttpConnection;
+import org.eclipse.jetty.server.Handler;
+import org.eclipse.jetty.server.Request;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.util.HostMap;
+import org.eclipse.jetty.util.TypeUtil;
+import org.eclipse.jetty.util.component.LifeCycle;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+import org.eclipse.jetty.util.thread.ThreadPool;
+
+/**
+ * <p>Implementation of a tunneling proxy that supports HTTP CONNECT.</p>
+ * <p>To work as CONNECT proxy, objects of this class must be instantiated using the no-arguments
+ * constructor, since the remote server information will be present in the CONNECT URI.</p>
+ */
+public class ConnectHandler extends HandlerWrapper
+{
+    private static final Logger LOG = Log.getLogger(ConnectHandler.class);
+    private final SelectorManager _selectorManager = new Manager();
+    private volatile int _connectTimeout = 5000;
+    private volatile int _writeTimeout = 30000;
+    private volatile ThreadPool _threadPool;
+    private volatile boolean _privateThreadPool;
+    private HostMap<String> _white = new HostMap<String>();
+    private HostMap<String> _black = new HostMap<String>();
+
+    public ConnectHandler()
+    {
+        this(null);
+    }
+
+    public ConnectHandler(String[] white, String[] black)
+    {
+        this(null, white, black);
+    }
+
+    public ConnectHandler(Handler handler)
+    {
+        setHandler(handler);
+    }
+
+    public ConnectHandler(Handler handler, String[] white, String[] black)
+    {
+        setHandler(handler);
+        set(white, _white);
+        set(black, _black);
+    }
+
+    /**
+     * @return the timeout, in milliseconds, to connect to the remote server
+     */
+    public int getConnectTimeout()
+    {
+        return _connectTimeout;
+    }
+
+    /**
+     * @param connectTimeout the timeout, in milliseconds, to connect to the remote server
+     */
+    public void setConnectTimeout(int connectTimeout)
+    {
+        _connectTimeout = connectTimeout;
+    }
+
+    /**
+     * @return the timeout, in milliseconds, to write data to a peer
+     */
+    public int getWriteTimeout()
+    {
+        return _writeTimeout;
+    }
+
+    /**
+     * @param writeTimeout the timeout, in milliseconds, to write data to a peer
+     */
+    public void setWriteTimeout(int writeTimeout)
+    {
+        _writeTimeout = writeTimeout;
+    }
+
+    @Override
+    public void setServer(Server server)
+    {
+        super.setServer(server);
+
+        server.getContainer().update(this, null, _selectorManager, "selectManager");
+
+        if (_privateThreadPool)
+            server.getContainer().update(this, null, _privateThreadPool, "threadpool", true);
+        else
+            _threadPool = server.getThreadPool();
+    }
+
+    /**
+     * @return the thread pool
+     */
+    public ThreadPool getThreadPool()
+    {
+        return _threadPool;
+    }
+
+    /**
+     * @param threadPool the thread pool
+     */
+    public void setThreadPool(ThreadPool threadPool)
+    {
+        if (getServer() != null)
+            getServer().getContainer().update(this, _privateThreadPool ? _threadPool : null, threadPool, "threadpool", true);
+        _privateThreadPool = threadPool != null;
+        _threadPool = threadPool;
+    }
+
+    @Override
+    protected void doStart() throws Exception
+    {
+        super.doStart();
+
+        if (_threadPool == null)
+        {
+            _threadPool = getServer().getThreadPool();
+            _privateThreadPool = false;
+        }
+        if (_threadPool instanceof LifeCycle && !((LifeCycle)_threadPool).isRunning())
+            ((LifeCycle)_threadPool).start();
+
+        _selectorManager.start();
+    }
+
+    @Override
+    protected void doStop() throws Exception
+    {
+        _selectorManager.stop();
+
+        ThreadPool threadPool = _threadPool;
+        if (_privateThreadPool && _threadPool != null && threadPool instanceof LifeCycle)
+            ((LifeCycle)threadPool).stop();
+
+        super.doStop();
+    }
+
+    @Override
+    public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
+    {
+        if (HttpMethods.CONNECT.equalsIgnoreCase(request.getMethod()))
+        {
+            LOG.debug("CONNECT request for {}", request.getRequestURI());
+            try
+            {
+                handleConnect(baseRequest, request, response, request.getRequestURI());
+            }
+            catch(Exception e)
+            {
+                LOG.warn("ConnectHandler "+baseRequest.getUri()+" "+ e);
+                LOG.debug(e);
+            }
+        }
+        else
+        {
+            super.handle(target, baseRequest, request, response);
+        }
+    }
+
+    /**
+     * <p>Handles a CONNECT request.</p>
+     * <p>CONNECT requests may have authentication headers such as <code>Proxy-Authorization</code>
+     * that authenticate the client with the proxy.</p>
+     *
+     * @param baseRequest   Jetty-specific http request
+     * @param request       the http request
+     * @param response      the http response
+     * @param serverAddress the remote server address in the form {@code host:port}
+     * @throws ServletException if an application error occurs
+     * @throws IOException      if an I/O error occurs
+     */
+    protected void handleConnect(Request baseRequest, HttpServletRequest request, HttpServletResponse response, String serverAddress) throws ServletException, IOException
+    {
+        boolean proceed = handleAuthentication(request, response, serverAddress);
+        if (!proceed)
+            return;
+
+        String host = serverAddress;
+        int port = 80;
+        int colon = serverAddress.indexOf(':');
+        if (colon > 0)
+        {
+            host = serverAddress.substring(0, colon);
+            port = Integer.parseInt(serverAddress.substring(colon + 1));
+        }
+
+        if (!validateDestination(host))
+        {
+            LOG.info("ProxyHandler: Forbidden destination " + host);
+            response.setStatus(HttpServletResponse.SC_FORBIDDEN);
+            baseRequest.setHandled(true);
+            return;
+        }
+
+        SocketChannel channel;
+
+        try
+        {
+            channel = connectToServer(request,host,port);
+        }
+        catch (SocketException se)
+        {
+            LOG.info("ConnectHandler: SocketException " + se.getMessage());
+            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+            baseRequest.setHandled(true);
+            return;
+        }
+        catch (SocketTimeoutException ste)
+        {
+            LOG.info("ConnectHandler: SocketTimeoutException" + ste.getMessage());
+            response.setStatus(HttpServletResponse.SC_GATEWAY_TIMEOUT);
+            baseRequest.setHandled(true);
+            return;
+        }
+        catch (IOException ioe)
+        {
+            LOG.info("ConnectHandler: IOException" + ioe.getMessage());
+            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+            baseRequest.setHandled(true);
+            return;
+        }
+
+        // Transfer unread data from old connection to new connection
+        // We need to copy the data to avoid races:
+        // 1. when this unread data is written and the server replies before the clientToProxy
+        // connection is installed (it is only installed after returning from this method)
+        // 2. when the client sends data before this unread data has been written.
+        AbstractHttpConnection httpConnection = AbstractHttpConnection.getCurrentConnection();
+        Buffer headerBuffer = ((HttpParser)httpConnection.getParser()).getHeaderBuffer();
+        Buffer bodyBuffer = ((HttpParser)httpConnection.getParser()).getBodyBuffer();
+        int length = headerBuffer == null ? 0 : headerBuffer.length();
+        length += bodyBuffer == null ? 0 : bodyBuffer.length();
+        IndirectNIOBuffer buffer = null;
+        if (length > 0)
+        {
+            buffer = new IndirectNIOBuffer(length);
+            if (headerBuffer != null)
+            {
+                buffer.put(headerBuffer);
+                headerBuffer.clear();
+            }
+            if (bodyBuffer != null)
+            {
+                buffer.put(bodyBuffer);
+                bodyBuffer.clear();
+            }
+        }
+
+        ConcurrentMap<String, Object> context = new ConcurrentHashMap<String, Object>();
+        prepareContext(request, context);
+
+        ClientToProxyConnection clientToProxy = prepareConnections(context, channel, buffer);
+
+        // CONNECT expects a 200 response
+        response.setStatus(HttpServletResponse.SC_OK);
+
+        // Prevent close
+        baseRequest.getConnection().getGenerator().setPersistent(true);
+
+        // Close to force last flush it so that the client receives it
+        response.getOutputStream().close();
+
+        upgradeConnection(request, response, clientToProxy);
+    }
+
+    private ClientToProxyConnection prepareConnections(ConcurrentMap<String, Object> context, SocketChannel channel, Buffer buffer)
+    {
+        AbstractHttpConnection httpConnection = AbstractHttpConnection.getCurrentConnection();
+        ProxyToServerConnection proxyToServer = newProxyToServerConnection(context, buffer);
+        ClientToProxyConnection clientToProxy = newClientToProxyConnection(context, channel, httpConnection.getEndPoint(), httpConnection.getTimeStamp());
+        clientToProxy.setConnection(proxyToServer);
+        proxyToServer.setConnection(clientToProxy);
+        return clientToProxy;
+    }
+
+    /**
+     * <p>Handles the authentication before setting up the tunnel to the remote server.</p>
+     * <p>The default implementation returns true.</p>
+     *
+     * @param request  the HTTP request
+     * @param response the HTTP response
+     * @param address  the address of the remote server in the form {@code host:port}.
+     * @return true to allow to connect to the remote host, false otherwise
+     * @throws ServletException to report a server error to the caller
+     * @throws IOException      to report a server error to the caller
+     */
+    protected boolean handleAuthentication(HttpServletRequest request, HttpServletResponse response, String address) throws ServletException, IOException
+    {
+        return true;
+    }
+
+    protected ClientToProxyConnection newClientToProxyConnection(ConcurrentMap<String, Object> context, SocketChannel channel, EndPoint endPoint, long timeStamp)
+    {
+        return new ClientToProxyConnection(context, channel, endPoint, timeStamp);
+    }
+
+    protected ProxyToServerConnection newProxyToServerConnection(ConcurrentMap<String, Object> context, Buffer buffer)
+    {
+        return new ProxyToServerConnection(context, buffer);
+    }
+
+    // may return null
+    private SocketChannel connectToServer(HttpServletRequest request, String host, int port) throws IOException
+    {
+        SocketChannel channel = connect(request, host, port);      
+        channel.configureBlocking(false);
+        return channel;
+    }
+
+    /**
+     * <p>Establishes a connection to the remote server.</p>
+     *
+     * @param request the HTTP request that initiated the tunnel
+     * @param host    the host to connect to
+     * @param port    the port to connect to
+     * @return a {@link SocketChannel} connected to the remote server
+     * @throws IOException if the connection cannot be established
+     */
+    protected SocketChannel connect(HttpServletRequest request, String host, int port) throws IOException
+    {
+        SocketChannel channel = SocketChannel.open();
+
+        if (channel == null)
+        {
+            throw new IOException("unable to connect to " + host + ":" + port);
+        }
+
+        try
+        {
+            // Connect to remote server
+            LOG.debug("Establishing connection to {}:{}", host, port);
+            channel.socket().setTcpNoDelay(true);
+            channel.socket().connect(new InetSocketAddress(host, port), getConnectTimeout());
+            LOG.debug("Established connection to {}:{}", host, port);
+            return channel;
+        }
+        catch (IOException x)
+        {
+            LOG.debug("Failed to establish connection to " + host + ":" + port, x);
+            try
+            {
+                channel.close();
+            }
+            catch (IOException xx)
+            {
+                LOG.ignore(xx);
+            }
+            throw x;
+        }
+    }
+
+    protected void prepareContext(HttpServletRequest request, ConcurrentMap<String, Object> context)
+    {
+    }
+
+    private void upgradeConnection(HttpServletRequest request, HttpServletResponse response, Connection connection) throws IOException
+    {
+        // Set the new connection as request attribute and change the status to 101
+        // so that Jetty understands that it has to upgrade the connection
+        request.setAttribute("org.eclipse.jetty.io.Connection", connection);
+        response.setStatus(HttpServletResponse.SC_SWITCHING_PROTOCOLS);
+        LOG.debug("Upgraded connection to {}", connection);
+    }
+
+    private void register(SocketChannel channel, ProxyToServerConnection proxyToServer) throws IOException
+    {
+        _selectorManager.register(channel, proxyToServer);
+        proxyToServer.waitReady(_connectTimeout);
+    }
+
+    /**
+     * <p>Reads (with non-blocking semantic) into the given {@code buffer} from the given {@code endPoint}.</p>
+     *
+     * @param endPoint the endPoint to read from
+     * @param buffer   the buffer to read data into
+     * @param context  the context information related to the connection
+     * @return the number of bytes read (possibly 0 since the read is non-blocking)
+     *         or -1 if the channel has been closed remotely
+     * @throws IOException if the endPoint cannot be read
+     */
+    protected int read(EndPoint endPoint, Buffer buffer, ConcurrentMap<String, Object> context) throws IOException
+    {
+        return endPoint.fill(buffer);
+    }
+
+    /**
+     * <p>Writes (with blocking semantic) the given buffer of data onto the given endPoint.</p>
+     *
+     * @param endPoint the endPoint to write to
+     * @param buffer   the buffer to write
+     * @param context  the context information related to the connection
+     * @throws IOException if the buffer cannot be written
+     * @return the number of bytes written
+     */
+    protected int write(EndPoint endPoint, Buffer buffer, ConcurrentMap<String, Object> context) throws IOException
+    {
+        if (buffer == null)
+            return 0;
+
+        int length = buffer.length();
+        final StringBuilder debug = LOG.isDebugEnabled()?new StringBuilder():null;
+        int flushed = endPoint.flush(buffer);
+        if (debug!=null)
+            debug.append(flushed);
+        
+        // Loop until all written
+        while (buffer.length()>0 && !endPoint.isOutputShutdown())
+        {
+            if (!endPoint.isBlocking())
+            {
+                boolean ready = endPoint.blockWritable(getWriteTimeout());
+                if (!ready)
+                    throw new IOException("Write timeout");
+            }
+            flushed = endPoint.flush(buffer);
+            if (debug!=null)
+                debug.append("+").append(flushed);
+        }
+       
+        LOG.debug("Written {}/{} bytes {}", debug, length, endPoint);
+        buffer.compact();
+        return length;
+    }
+
+    private class Manager extends SelectorManager
+    {
+        @Override
+        protected SelectChannelEndPoint newEndPoint(SocketChannel channel, SelectSet selectSet, SelectionKey key) throws IOException
+        {
+            SelectChannelEndPoint endp = new SelectChannelEndPoint(channel, selectSet, key, channel.socket().getSoTimeout());
+            endp.setConnection(selectSet.getManager().newConnection(channel,endp, key.attachment()));
+            endp.setMaxIdleTime(_writeTimeout);
+            return endp;
+        }
+
+        @Override
+        public AsyncConnection newConnection(SocketChannel channel, AsyncEndPoint endpoint, Object attachment)
+        {
+            ProxyToServerConnection proxyToServer = (ProxyToServerConnection)attachment;
+            proxyToServer.setTimeStamp(System.currentTimeMillis());
+            proxyToServer.setEndPoint(endpoint);
+            return proxyToServer;
+        }
+
+        @Override
+        protected void endPointOpened(SelectChannelEndPoint endpoint)
+        {
+            ProxyToServerConnection proxyToServer = (ProxyToServerConnection)endpoint.getSelectionKey().attachment();
+            proxyToServer.ready();
+        }
+
+        @Override
+        public boolean dispatch(Runnable task)
+        {
+            return _threadPool.dispatch(task);
+        }
+
+        @Override
+        protected void endPointClosed(SelectChannelEndPoint endpoint)
+        {
+        }
+
+        @Override
+        protected void endPointUpgraded(ConnectedEndPoint endpoint, Connection oldConnection)
+        {
+        }
+    }
+
+    public class ProxyToServerConnection implements AsyncConnection
+    {
+        private final CountDownLatch _ready = new CountDownLatch(1);
+        private final Buffer _buffer = new IndirectNIOBuffer(4096);
+        private final ConcurrentMap<String, Object> _context;
+        private volatile Buffer _data;
+        private volatile ClientToProxyConnection _toClient;
+        private volatile long _timestamp;
+        private volatile AsyncEndPoint _endPoint;
+
+        public ProxyToServerConnection(ConcurrentMap<String, Object> context, Buffer data)
+        {
+            _context = context;
+            _data = data;
+        }
+
+        @Override
+        public String toString()
+        {
+            StringBuilder builder = new StringBuilder("ProxyToServer");
+            builder.append("(:").append(_endPoint.getLocalPort());
+            builder.append("<=>:").append(_endPoint.getRemotePort());
+            return builder.append(")").toString();
+        }
+
+        public Connection handle() throws IOException
+        {
+            LOG.debug("{}: begin reading from server", this);
+            try
+            {
+                writeData();
+
+                while (true)
+                {
+                    int read = read(_endPoint, _buffer, _context);
+
+                    if (read == -1)
+                    {
+                        LOG.debug("{}: server closed connection {}", this, _endPoint);
+
+                        if (_endPoint.isOutputShutdown() || !_endPoint.isOpen())
+                            closeClient();
+                        else
+                            _toClient.shutdownOutput();
+
+                        break;
+                    }
+
+                    if (read == 0)
+                        break;
+
+                    LOG.debug("{}: read from server {} bytes {}", this, read, _endPoint);
+                    int written = write(_toClient._endPoint, _buffer, _context);
+                    LOG.debug("{}: written to {} {} bytes", this, _toClient, written);
+                }
+                return this;
+            }
+            catch (ClosedChannelException x)
+            {
+                LOG.debug(x);
+                throw x;
+            }
+            catch (IOException x)
+            {
+                LOG.warn(this + ": unexpected exception", x);
+                close();
+                throw x;
+            }
+            catch (RuntimeException x)
+            {
+                LOG.warn(this + ": unexpected exception", x);
+                close();
+                throw x;
+            }
+            finally
+            {
+                LOG.debug("{}: end reading from server", this);
+            }
+        }
+
+        public void onInputShutdown() throws IOException
+        {
+        }
+
+        private void writeData() throws IOException
+        {
+            // This method is called from handle() and closeServer()
+            // which may happen concurrently (e.g. a client closing
+            // while reading from the server), so needs synchronization
+            synchronized (this)
+            {
+                if (_data != null)
+                {
+                    try
+                    {
+                        int written = write(_endPoint, _data, _context);
+                        LOG.debug("{}: written to server {} bytes", this, written);
+                    }
+                    finally
+                    {
+                        // Attempt once to write the data; if the write fails (for example
+                        // because the connection is already closed), clear the data and
+                        // give up to avoid to continue to write data to a closed connection
+                        _data = null;
+                    }
+                }
+            }
+        }
+
+        public void setConnection(ClientToProxyConnection connection)
+        {
+            _toClient = connection;
+        }
+
+        public long getTimeStamp()
+        {
+            return _timestamp;
+        }
+
+        public void setTimeStamp(long timestamp)
+        {
+            _timestamp = timestamp;
+        }
+
+        public void setEndPoint(AsyncEndPoint endpoint)
+        {
+            _endPoint = endpoint;
+        }
+
+        public boolean isIdle()
+        {
+            return false;
+        }
+
+        public boolean isSuspended()
+        {
+            return false;
+        }
+
+        public void onClose()
+        {
+        }
+
+        public void ready()
+        {
+            _ready.countDown();
+        }
+
+        public void waitReady(long timeout) throws IOException
+        {
+            try
+            {
+                _ready.await(timeout, TimeUnit.MILLISECONDS);
+            }
+            catch (final InterruptedException x)
+            {
+                throw new IOException()
+                {{
+                        initCause(x);
+                    }};
+            }
+        }
+
+        public void closeClient() throws IOException
+        {
+            _toClient.closeClient();
+        }
+
+        public void closeServer() throws IOException
+        {
+            _endPoint.close();
+        }
+
+        public void close()
+        {
+            try
+            {
+                closeClient();
+            }
+            catch (IOException x)
+            {
+                LOG.debug(this + ": unexpected exception closing the client", x);
+            }
+
+            try
+            {
+                closeServer();
+            }
+            catch (IOException x)
+            {
+                LOG.debug(this + ": unexpected exception closing the server", x);
+            }
+        }
+
+        public void shutdownOutput() throws IOException
+        {
+            writeData();
+            _endPoint.shutdownOutput();
+        }
+
+        public void onIdleExpired(long idleForMs)
+        {
+            try
+            {
+                LOG.debug("{} idle expired", this);
+                if (_endPoint.isOutputShutdown())
+                    close();
+                else
+                    shutdownOutput();
+            }
+            catch(Exception e)
+            {
+                LOG.debug(e);
+                close();
+            }
+        }
+    }
+
+    public class ClientToProxyConnection implements AsyncConnection
+    {
+        private final Buffer _buffer = new IndirectNIOBuffer(4096);
+        private final ConcurrentMap<String, Object> _context;
+        private final SocketChannel _channel;
+        private final EndPoint _endPoint;
+        private final long _timestamp;
+        private volatile ProxyToServerConnection _toServer;
+        private boolean _firstTime = true;
+
+        public ClientToProxyConnection(ConcurrentMap<String, Object> context, SocketChannel channel, EndPoint endPoint, long timestamp)
+        {
+            _context = context;
+            _channel = channel;
+            _endPoint = endPoint;
+            _timestamp = timestamp;
+        }
+
+        @Override
+        public String toString()
+        {
+            StringBuilder builder = new StringBuilder("ClientToProxy");
+            builder.append("(:").append(_endPoint.getLocalPort());
+            builder.append("<=>:").append(_endPoint.getRemotePort());
+            return builder.append(")").toString();
+        }
+
+        public Connection handle() throws IOException
+        {
+            LOG.debug("{}: begin reading from client", this);
+            try
+            {
+                if (_firstTime)
+                {
+                    _firstTime = false;
+                    register(_channel, _toServer);
+                    LOG.debug("{}: registered channel {} with connection {}", this, _channel, _toServer);
+                }
+
+                while (true)
+                {
+                    int read = read(_endPoint, _buffer, _context);
+
+                    if (read == -1)
+                    {
+                        LOG.debug("{}: client closed connection {}", this, _endPoint);
+
+                        if (_endPoint.isOutputShutdown() || !_endPoint.isOpen())
+                            closeServer();
+                        else
+                            _toServer.shutdownOutput();
+
+                        break;
+                    }
+
+                    if (read == 0)
+                        break;
+
+                    LOG.debug("{}: read from client {} bytes {}", this, read, _endPoint);
+                    int written = write(_toServer._endPoint, _buffer, _context);
+                    LOG.debug("{}: written to {} {} bytes", this, _toServer, written);
+                }
+                return this;
+            }
+            catch (ClosedChannelException x)
+            {
+                LOG.debug(x);
+                closeServer();
+                throw x;
+            }
+            catch (IOException x)
+            {
+                LOG.warn(this + ": unexpected exception", x);
+                close();
+                throw x;
+            }
+            catch (RuntimeException x)
+            {
+                LOG.warn(this + ": unexpected exception", x);
+                close();
+                throw x;
+            }
+            finally
+            {
+                LOG.debug("{}: end reading from client", this);
+            }
+        }
+
+        public void onInputShutdown() throws IOException
+        {
+        }
+
+        public long getTimeStamp()
+        {
+            return _timestamp;
+        }
+
+        public boolean isIdle()
+        {
+            return false;
+        }
+
+        public boolean isSuspended()
+        {
+            return false;
+        }
+
+        public void onClose()
+        {
+        }
+
+        public void setConnection(ProxyToServerConnection connection)
+        {
+            _toServer = connection;
+        }
+
+        public void closeClient() throws IOException
+        {
+            _endPoint.close();
+        }
+
+        public void closeServer() throws IOException
+        {
+            _toServer.closeServer();
+        }
+
+        public void close()
+        {
+            try
+            {
+                closeClient();
+            }
+            catch (IOException x)
+            {
+                LOG.debug(this + ": unexpected exception closing the client", x);
+            }
+
+            try
+            {
+                closeServer();
+            }
+            catch (IOException x)
+            {
+                LOG.debug(this + ": unexpected exception closing the server", x);
+            }
+        }
+
+        public void shutdownOutput() throws IOException
+        {
+            _endPoint.shutdownOutput();
+        }
+
+        public void onIdleExpired(long idleForMs)
+        {
+            try
+            {
+                LOG.debug("{} idle expired", this);
+                if (_endPoint.isOutputShutdown())
+                    close();
+                else
+                    shutdownOutput();
+            }
+            catch(Exception e)
+            {
+                LOG.debug(e);
+                close();
+            }
+        }
+    }
+
+    /**
+     * Add a whitelist entry to an existing handler configuration
+     *
+     * @param entry new whitelist entry
+     */
+    public void addWhite(String entry)
+    {
+        add(entry, _white);
+    }
+
+    /**
+     * Add a blacklist entry to an existing handler configuration
+     *
+     * @param entry new blacklist entry
+     */
+    public void addBlack(String entry)
+    {
+        add(entry, _black);
+    }
+
+    /**
+     * Re-initialize the whitelist of existing handler object
+     *
+     * @param entries array of whitelist entries
+     */
+    public void setWhite(String[] entries)
+    {
+        set(entries, _white);
+    }
+
+    /**
+     * Re-initialize the blacklist of existing handler object
+     *
+     * @param entries array of blacklist entries
+     */
+    public void setBlack(String[] entries)
+    {
+        set(entries, _black);
+    }
+
+    /**
+     * Helper method to process a list of new entries and replace
+     * the content of the specified host map
+     *
+     * @param entries new entries
+     * @param hostMap target host map
+     */
+    protected void set(String[] entries, HostMap<String> hostMap)
+    {
+        hostMap.clear();
+
+        if (entries != null && entries.length > 0)
+        {
+            for (String addrPath : entries)
+            {
+                add(addrPath, hostMap);
+            }
+        }
+    }
+
+    /**
+     * Helper method to process the new entry and add it to
+     * the specified host map.
+     *
+     * @param entry      new entry
+     * @param hostMap target host map
+     */
+    private void add(String entry, HostMap<String> hostMap)
+    {
+        if (entry != null && entry.length() > 0)
+        {
+            entry = entry.trim();
+            if (hostMap.get(entry) == null)
+            {
+                hostMap.put(entry, entry);
+            }
+        }
+    }
+
+    /**
+     * Check the request hostname against white- and blacklist.
+     *
+     * @param host hostname to check
+     * @return true if hostname is allowed to be proxied
+     */
+    public boolean validateDestination(String host)
+    {
+        if (_white.size() > 0)
+        {
+            Object whiteObj = _white.getLazyMatches(host);
+            if (whiteObj == null)
+            {
+                return false;
+            }
+        }
+
+        if (_black.size() > 0)
+        {
+            Object blackObj = _black.getLazyMatches(host);
+            if (blackObj != null)
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public void dump(Appendable out, String indent) throws IOException
+    {
+        dumpThis(out);
+        if (_privateThreadPool)
+            dump(out, indent, Arrays.asList(_threadPool, _selectorManager), TypeUtil.asList(getHandlers()), getBeans());
+        else
+            dump(out, indent, Arrays.asList(_selectorManager), TypeUtil.asList(getHandlers()), getBeans());
+    }
+}