package examples;
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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);
}
}
}
}