/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "SOAP" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 2000, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */


import java.io.*;
import java.net.*;
import java.awt.TextArea;

/**
 * A <code>Relay</code> object is used by <code>TcpTunnel</code>
 * and <code>TcpTunnelGui</code> to relay bytes from an
 * <code>InputStream</code> to a <code>OutputStream</code>.
 *
 * @author Sanjiva Weerawarana (sanjiva@watson.ibm.com)
 */
public class Relay extends Thread {
  final static int BUFSIZ = 100;
  InputStream in;
  OutputStream out;
  byte buf[] = new byte[BUFSIZ];
  TextArea ta;
  final String remoteHost;

  // initialisation of thread
  Relay (InputStream in, OutputStream out, TextArea ta, String host) {
    this.in = in;
    this.out = out;
    this.ta = ta;
    this.remoteHost = host;
  }

  // run method of thread
  public void run () {
    int n;

    try {
      // read each line from the InputStream
      while ((n = in.read (buf)) > 0) {
        // output n
        // each line is then put into a string
        String str = new String(buf, 0, n, "UTF-8");
        String newstr = str.replaceAll("Host: [^ \n]+", "Host: " + remoteHost);
        str = new String(newstr);
        out.write(str.getBytes());
        out.flush ();
        if (ta != null) {
          // output the data to the textarea
          ta.append (str);
        }
      }
    } catch (IOException e) {
    } finally {
      try {
        in.close ();
        out.close ();
      } catch (IOException e) {
      }
    }
  }
}