RelayInterceptor.java

/*
 * This file is part of the OWASP Proxy, a free intercepting proxy library.
 * Copyright (C) 2008-2010 Rogan Dawes <rogan@dawes.za.net>
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to:
 * The Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

package org.owasp.proxy.tcp;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Handles one side of the communications between client and target, reading from the InputStream, and notifying the
 * StreamInterceptor.
 * 
 * @author rogan
 * 
 */
class RelayInterceptor<C, S> extends Thread implements StreamHandle {

    private StreamInterceptor<C, S> interceptor;
    private InputStream in;
    private OutputStream out;
    private boolean done = false;
    private Object lock = new Object();

    private Runnable closer = null;

    public RelayInterceptor(StreamInterceptor<C, S> interceptor,
            InputStream in, OutputStream out) {
        this.interceptor = interceptor;
        this.in = in;
        this.out = out;
        setName("Interceptor");
        setDaemon(true);
    }

    public void setCloseHandler(Runnable closer) {
        this.closer = closer;
    }

    public void run() {
        try {
            byte[] buff = new byte[4096];
            int got;
            while ((got = in.read(buff)) > -1 && !done) {
                interceptor.received(this, buff, 0, got);
            }
        } catch (IOException ioe) {
            interceptor.readException(this, ioe);
        } finally {
            interceptor.inputClosed(this);
        }
        try {
            while (!done) {
                synchronized (lock) {
                    lock.wait(1000);
                }
            }
        } catch (InterruptedException ie) {
            // we're done, return
        }
        if (closer != null)
            closer.run();
    }

    public void write(byte[] b, int off, int len) throws IOException {
        out.write(b, off, len);
    }

    public void close() {
        try {
            out.flush();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
        done = true;
        synchronized (lock) {
            lock.notify();
        }
    }
}