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 The Apache MINA Project (dev@mina.apache.org)
34 * @version $Rev: 685703 $, $Date: 2008-08-14 00:14:47 +0200 (Thu, 14 Aug 2008) $
35 * @since MINA 2.0.0-M3
36 */
37 public abstract class AbstractProxyIoHandler extends IoHandlerAdapter {
38 private final static Logger logger = LoggerFactory
39 .getLogger(AbstractProxyIoHandler.class);
40
41 /**
42 * Method called only when handshake has completed.
43 */
44 public abstract void proxySessionOpened(IoSession session) throws Exception;
45
46 /**
47 * Hooked session opened event.
48 */
49 @Override
50 public final void sessionOpened(IoSession session) throws Exception {
51 ProxyIoSession proxyIoSession = (ProxyIoSession) session
52 .getAttribute(ProxyIoSession.PROXY_SESSION);
53
54 if (proxyIoSession.getRequest() instanceof SocksProxyRequest
55 || proxyIoSession.isAuthenticationFailed()
56 || proxyIoSession.getHandler().isHandshakeComplete()) {
57 proxySessionOpened(session);
58 } else {
59 logger.debug("Filtered session opened event !");
60 }
61 }
62 }