View Javadoc

    1   /*
    2    *  Licensed to the Apache Software Foundation (ASF) under one
    3    *  or more contributor license agreements.  See the NOTICE file
    4    *  distributed with this work for additional information
    5    *  regarding copyright ownership.  The ASF licenses this file
    6    *  to you under the Apache License, Version 2.0 (the
    7    *  "License"); you may not use this file except in compliance
    8    *  with the License.  You may obtain a copy of the License at
    9    *
    10   *    http://www.apache.org/licenses/LICENSE-2.0
    11   *
    12   *  Unless required by applicable law or agreed to in writing,
    13   *  software distributed under the License is distributed on an
    14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15   *  KIND, either express or implied.  See the License for the
    16   *  specific language governing permissions and limitations
    17   *  under the License.
    18   *
    19   */
    20  package org.apache.mina.proxy;
    21
    22  import org.apache.mina.core.service.IoHandler;
    23  import org.apache.mina.core.service.IoHandlerAdapter;
    24  import org.apache.mina.core.session.IoSession;
    25  import org.apache.mina.proxy.handlers.socks.SocksProxyRequest;
    26  import org.apache.mina.proxy.session.ProxyIoSession;
    27  import org.slf4j.Logger;
    28  import org.slf4j.LoggerFactory;
    29
    30  /**
    31   * AbstractProxyIoHandler.java - {@link IoHandler} that intercepts events until handshake is complete.
    32   *
    33   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    34   * @since MINA 2.0.0-M3
    35   */
    36  public abstract class AbstractProxyIoHandler extends IoHandlerAdapter {
    37      private final static Logger logger = LoggerFactory.getLogger(AbstractProxyIoHandler.class);
    38
    39      /**
    40       * Method called only when handshake has completed.
    41       *
    42       * @param session the io session
    43       */
    44      public abstract void proxySessionOpened(IoSession session) throws Exception;
    45
    46      /**
    47       * Hooked session opened event.
    48       *
    49       * @param session the io session
    50       */
    51      @Override
    52      public final void sessionOpened(IoSession session) throws Exception {
    53          ProxyIoSession proxyIoSession = (ProxyIoSession) session.getAttribute(ProxyIoSession.PROXY_SESSION);
    54
    55          if (proxyIoSession.getRequest() instanceof SocksProxyRequest || proxyIoSession.isAuthenticationFailed()
    56                  || proxyIoSession.getHandler().isHandshakeComplete()) {
    57              proxySessionOpened(session);
    58          } else {
    59              logger.debug("Filtered session opened event !");
    60          }
    61      }
    62  }