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// --- BEGIN COPYRIGHT BLOCK ---
// 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; version 2 of the License.
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.net;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;
/**
* This is the base class for network clients.
*
* @version 1.21, 08/07/97
* @author Jonathan Payne
*/
public class NetworkClient {
/** Socket for communicating with server. */
protected Socket serverSocket = null;
/** Stream for printing to the server. */
public PrintStream serverOutput;
/** Buffered stream for reading replies from server. */
public InputStream serverInput;
/** Open a connection to the server. */
public void openServer(String server, int port)
throws IOException, UnknownHostException {
if (serverSocket != null)
closeServer();
serverSocket = doConnect(server, port);
serverOutput = new PrintStream(new BufferedOutputStream(serverSocket.getOutputStream()),
true);
serverInput = new BufferedInputStream(serverSocket.getInputStream());
}
/**
* Return a socket connected to the server, with any
* appropriate options pre-established
*/
protected Socket doConnect(String server, int port)
throws IOException, UnknownHostException {
return new Socket(server, port);
}
/** Close an open connection to the server. */
public void closeServer() throws IOException {
if (!serverIsOpen()) {
return;
}
serverSocket.close();
serverSocket = null;
serverInput = null;
serverOutput = null;
}
/** Return server connection status */
public boolean serverIsOpen() {
return serverSocket != null;
}
/** Create connection with host <i>host</i> on port <i>port</i> */
public NetworkClient(String host, int port) throws IOException {
openServer(host, port);
}
public NetworkClient() {
}
}
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