/*
* Copyright 2001-2005 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package examples.nntp;
import java.io.IOException;
import org.apache.commons.net.nntp.NNTPClient;
import org.apache.commons.net.nntp.NewsgroupInfo;
/***
* This is a trivial example using the NNTP package to approximate the
* Unix newsgroups command. It merely connects to the specified news
* server and issues fetches the list of newsgroups stored by the server.
* On servers that store a lot of newsgroups, this command can take a very
* long time (listing upwards of 30,000 groups).
* <p>
***/
public final class newsgroups
{
public final static void main(String[] args)
{
NNTPClient client;
NewsgroupInfo[] list;
if (args.length < 1)
{
System.err.println("Usage: newsgroups newsserver");
System.exit(1);
}
client = new NNTPClient();
try
{
client.connect(args[0]);
list = client.listNewsgroups();
if (list != null)
{
for (int i = 0; i < list.length; i++)
System.out.println(list[i].getNewsgroup());
}
else
{
System.err.println("LIST command failed.");
System.err.println("Server reply: " + client.getReplyString());
}
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
try
{
if (client.isConnected())
client.disconnect();
}
catch (IOException e)
{
System.err.println("Error disconnecting from server.");
e.printStackTrace();
System.exit(1);
}
}
}
}