Examples of org.apache.mina.proxy.ProxyLogicHandler

org.apache.mina.proxy.ProxyLogicHandler
ProxyLogicHandler.java - Interface implemented by classes containing proxy type specific logic. @author The Apache MINA Project (dev@mina.apache.org) @version $Rev: 759663 $, $Date: 2009-03-29 12:46:40 +0200 (Sun, 29 Mar 2009) $ @since MINA 2.0.0-M3

     * 
     * @param session the session object
     * @return the handler which will handle handshaking with the proxy
     */
    private ProxyLogicHandler getProxyHandler(final IoSession session) {
        ProxyLogicHandler handler = ((ProxyIoSession) session
                .getAttribute(ProxyIoSession.PROXY_SESSION)).getHandler();


        if (handler == null) {
            throw new IllegalStateException();
        }


        // Sanity check
        if (handler.getProxyIoSession().getProxyFilter() != this) {
            throw new IllegalArgumentException("Not managed by this filter.");
        }


        return handler;
    }

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     */
    @Override
    public void messageReceived(final NextFilter nextFilter,
            final IoSession session, final Object message)
            throws ProxyAuthException {
        ProxyLogicHandler handler = getProxyHandler(session);


        synchronized (handler) {
            IoBuffer buf = (IoBuffer) message;


            if (handler.isHandshakeComplete()) {
                // Handshake done - pass data on as-is
                nextFilter.messageReceived(session, buf);


            } else {
                LOGGER.debug(" Data Read: {} ({})", handler, buf);


                // Keep sending handshake data to the handler until we run out
                // of data or the handshake is finished
                while (buf.hasRemaining() && !handler.isHandshakeComplete()) {
                    LOGGER.debug(" Pre-handshake - passing to handler");


                    int pos = buf.position();
                    handler.messageReceived(nextFilter, buf);


                    // Data not consumed or session closing
                    if (buf.position() == pos || session.isClosing()) {
                        return;
                    }

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     * 
     * @param session the session object
     * @return the handler which will handle handshaking with the proxy
     */
    private ProxyLogicHandler getProxyHandler(final IoSession session) {
        ProxyLogicHandler handler = ((ProxyIoSession) session.getAttribute(ProxyIoSession.PROXY_SESSION)).getHandler();


        if (handler == null) {
            throw new IllegalStateException();
        }


        // Sanity check
        if (handler.getProxyIoSession().getProxyFilter() != this) {
            throw new IllegalArgumentException("Not managed by this filter.");
        }


        return handler;
    }

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     * @param message the object holding the received data
     */
    @Override
    public void messageReceived(final NextFilter nextFilter, final IoSession session, final Object message)
            throws ProxyAuthException {
        ProxyLogicHandler handler = getProxyHandler(session);


        synchronized (handler) {
            IoBuffer buf = (IoBuffer) message;


            if (handler.isHandshakeComplete()) {
                // Handshake done - pass data on as-is
                nextFilter.messageReceived(session, buf);


            } else {
                LOGGER.debug(" Data Read: {} ({})", handler, buf);


                // Keep sending handshake data to the handler until we run out
                // of data or the handshake is finished
                while (buf.hasRemaining() && !handler.isHandshakeComplete()) {
                    LOGGER.debug(" Pre-handshake - passing to handler");


                    int pos = buf.position();
                    handler.messageReceived(nextFilter, buf);


                    // Data not consumed or session closing
                    if (buf.position() == pos || session.isClosing()) {
                        return;
                    }

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     * @param writeRequest the data to write
     * @param isHandshakeData true if writeRequest is written by the proxy classes.
     */
    public void writeData(final NextFilter nextFilter, final IoSession session, final WriteRequest writeRequest,
            final boolean isHandshakeData) {
        ProxyLogicHandler handler = getProxyHandler(session);


        synchronized (handler) {
            if (handler.isHandshakeComplete()) {
                // Handshake is done - write data as normal
                nextFilter.filterWrite(session, writeRequest);
            } else if (isHandshakeData) {
                LOGGER.debug("   handshake data: {}", writeRequest.getMessage());


                // Writing handshake data
                nextFilter.filterWrite(session, writeRequest);
            } else {
                // Writing non-handshake data before the handshake finished
                if (!session.isConnected()) {
                    // Not even connected - ignore
                    LOGGER.debug(" Write request on closed session. Request ignored.");
                } else {
                    // Queue the data to be sent as soon as the handshake completes
                    LOGGER.debug(" Handshaking is not complete yet. Buffering write request.");
                    handler.enqueueWriteRequest(nextFilter, writeRequest);
                }
            }
        }
    }

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        ProxyIoSession proxyIoSession = (ProxyIoSession) session.getAttribute(ProxyIoSession.PROXY_SESSION);
        LOGGER.debug("  get proxyIoSession: " + proxyIoSession);
        proxyIoSession.setProxyFilter(this);


        // Create a HTTP proxy handler and start handshake.
        ProxyLogicHandler handler = proxyIoSession.getHandler();


        // This test prevents from loosing handler conversationnal state when
        // reconnection occurs during an http handshake.
        if (handler == null) {
            ProxyRequest request = proxyIoSession.getRequest();


            if (request instanceof SocksProxyRequest) {
                SocksProxyRequest req = (SocksProxyRequest) request;
                if (req.getProtocolVersion() == SocksProxyConstants.SOCKS_VERSION_4) {
                    handler = new Socks4LogicHandler(proxyIoSession);
                } else {
                    handler = new Socks5LogicHandler(proxyIoSession);
                }
            } else {
                handler = new HttpSmartProxyHandler(proxyIoSession);
            }


            proxyIoSession.setHandler(handler);
            handler.doHandshake(nextFilter);
        }


        proxyIoSession.getEventQueue().enqueueEventIfNecessary(
                new IoSessionEvent(nextFilter, session, IoSessionEventType.CREATED));
    }

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     * 
     * @param session the session object
     * @return the handler which will handle handshaking with the proxy
     */
    private ProxyLogicHandler getProxyHandler(final IoSession session) {
        ProxyLogicHandler handler = ((ProxyIoSession) session
                .getAttribute(ProxyIoSession.PROXY_SESSION)).getHandler();


        if (handler == null) {
            throw new IllegalStateException();
        }


        // Sanity check
        if (handler.getProxyIoSession().getProxyFilter() != this) {
            throw new IllegalArgumentException("Not managed by this filter.");
        }


        return handler;
    }

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     */
    @Override
    public void messageReceived(final NextFilter nextFilter,
            final IoSession session, final Object message)
            throws ProxyAuthException {
        ProxyLogicHandler handler = getProxyHandler(session);


        synchronized (handler) {
            IoBuffer buf = (IoBuffer) message;


            if (handler.isHandshakeComplete()) {
                // Handshake done - pass data on as-is
                nextFilter.messageReceived(session, buf);


            } else {
                LOGGER.debug(" Data Read: {} ({})", handler, buf);


                // Keep sending handshake data to the handler until we run out
                // of data or the handshake is finished
                while (buf.hasRemaining() && !handler.isHandshakeComplete()) {
                    LOGGER.debug(" Pre-handshake - passing to handler");


                    int pos = buf.position();
                    handler.messageReceived(nextFilter, buf);


                    // Data not consumed or session closing
                    if (buf.position() == pos || session.isClosing()) {
                        return;
                    }

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     * @param writeRequest the data to write
     * @param isHandshakeData true if writeRequest is written by the proxy classes.
     */
    public void writeData(final NextFilter nextFilter, final IoSession session,
            final WriteRequest writeRequest, final boolean isHandshakeData) {
        ProxyLogicHandler handler = getProxyHandler(session);


        synchronized (handler) {
            if (handler.isHandshakeComplete()) {
                // Handshake is done - write data as normal
                nextFilter.filterWrite(session, writeRequest);
            } else if (isHandshakeData) {
                LOGGER.debug("   handshake data: {}", writeRequest.getMessage());
                
                // Writing handshake data
                nextFilter.filterWrite(session, writeRequest);
            } else {
                // Writing non-handshake data before the handshake finished
                if (!session.isConnected()) {
                    // Not even connected - ignore
                    LOGGER.debug(" Write request on closed session. Request ignored.");
                } else {
                    // Queue the data to be sent as soon as the handshake completes
                    LOGGER.debug(" Handshaking is not complete yet. Buffering write request.");
                    handler.enqueueWriteRequest(nextFilter, writeRequest);
                }
            }
        }
    }

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                .getAttribute(ProxyIoSession.PROXY_SESSION);
        LOGGER.debug("  get proxyIoSession: " + proxyIoSession);
        proxyIoSession.setProxyFilter(this);


        // Create a HTTP proxy handler and start handshake.
        ProxyLogicHandler handler = proxyIoSession.getHandler();


        // This test prevents from loosing handler conversationnal state when
        // reconnection occurs during an http handshake.
        if (handler == null) {
            ProxyRequest request = proxyIoSession.getRequest();


            if (request instanceof SocksProxyRequest) {
                SocksProxyRequest req = (SocksProxyRequest) request;
                if (req.getProtocolVersion() == SocksProxyConstants.SOCKS_VERSION_4) {
                    handler = new Socks4LogicHandler(proxyIoSession);
                } else {
                    handler = new Socks5LogicHandler(proxyIoSession);
                }
            } else {
                handler = new HttpSmartProxyHandler(proxyIoSession);
            }


            proxyIoSession.setHandler(handler);
            handler.doHandshake(nextFilter);
        }


        proxyIoSession.getEventQueue().enqueueEventIfNecessary(
                new IoSessionEvent(nextFilter, session,
                        IoSessionEventType.CREATED));

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org.apache.mina.proxy.filter.ProxyFilter

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