Commons Net example source code file (ExtendedNNTPOps.java)

This example Commons Net source code file (ExtendedNNTPOps.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Net tags/keywords

article, extendednntpops, extendednntpops, io, ioexception, iterable, newsgroupinfo, newsgroupinfo, nntpclient, nntpclient, printcommandlistener, string, string, subject

The Commons Net ExtendedNNTPOps.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 java.io.PrintWriter;

import org.apache.commons.net.PrintCommandListener;
import org.apache.commons.net.nntp.Article;
import org.apache.commons.net.nntp.NNTPClient;
import org.apache.commons.net.nntp.NewsgroupInfo;


/**
 * Simple class showing some of the extended commands (AUTH, XOVER, LIST ACTIVE)
 *
 * @author Rory Winston <rwinston@apache.org>
 */
public class ExtendedNNTPOps {


    NNTPClient client;

    public ExtendedNNTPOps() {
        client = new NNTPClient();
        client.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out), true));
    }


    private void demo(String host, String user, String password) {
        try {
            client.connect(host);

            // AUTHINFO USER/AUTHINFO PASS
            if (user != null && password != null) {
                boolean success = client.authenticate(user, password);
                if (success) {
                    System.out.println("Authentication succeeded");
                } else {
                    System.out.println("Authentication failed, error =" + client.getReplyString());
                }
            }

            // XOVER
            NewsgroupInfo testGroup = new NewsgroupInfo();
            client.selectNewsgroup("alt.test", testGroup);
            long lowArticleNumber = testGroup.getFirstArticleLong();
            long  highArticleNumber = lowArticleNumber + 100;
            Iterable<Article> articles = client.iterateArticleInfo(lowArticleNumber, highArticleNumber);

            for (Article article : articles) {
                if (article.isDummy()) { // Subject will contain raw response
                    System.out.println("Could not parse: "+article.getSubject());
                } else {
                    System.out.println(article.getSubject());
                }
            }

            // LIST ACTIVE
            NewsgroupInfo[] fanGroups = client.listNewsgroups("alt.fan.*");
            for (int i = 0; i < fanGroups.length; ++i) {
                System.out.println(fanGroups[i].getNewsgroup());
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        ExtendedNNTPOps ops;

        int argc = args.length;
        if (argc < 1) {
            System.err.println("usage: ExtendedNNTPOps nntpserver [username password]");
            System.exit(1);
        }

        ops = new ExtendedNNTPOps();
        ops.demo(args[0], argc >=3 ? args[1] : null, argc >=3 ? args[2] : null);
    }

}

/* Emacs configuration
 * Local variables:        **
 * mode:             java  **
 * c-basic-offset:   4     **
 * indent-tabs-mode: nil   **
 * End:                    **
 */