Appendix B Example echo client

This chapter shows how to build a simple echo client reading from stdin. This example is included in the distributed package in 'src/websocket4j/examples/EchoClient.java'.

package websocket4j.examples;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import websocket4j.client.WebSocket;

/**
 * This file is part of GNU WebSocket4J.
 * Copyright (C) 2010  Marek Aaron Sapota
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent modules,
 * and to copy and distribute the resulting executable under terms of your choice,
 * provided that you also meet, for each linked independent module, the terms and
 * conditions of the license of that module. An independent module is a module
 * which is not derived from or based on this library. If you modify this library,
 * you may extend this exception to your version of the library, but you are not
 * obligated to do so. If you do not wish to do so, delete this exception
 * statement from your version.
 */

/**
 * Example presenting an echo client using WebSocket4J.
 */
public class EchoClient {

    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        WebSocket ws = new WebSocket("localhost", 5555, "/echo");
        while (true) {
            String message = in.readLine();
            ws.sendMessage(message);
            System.out.println("Response: " + ws.getMessage());
            if (message.equals("exit"))
                break;
        }
        ws.close();
    }

}