001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.apache.commons.net.examples.nntp;
019
020import java.io.BufferedReader;
021import java.io.FileNotFoundException;
022import java.io.IOException;
023import java.io.InputStreamReader;
024import java.io.Reader;
025import java.io.Writer;
026import java.nio.charset.Charset;
027import java.nio.file.Files;
028import java.nio.file.Paths;
029
030import org.apache.commons.net.PrintCommandListener;
031import org.apache.commons.net.io.Util;
032import org.apache.commons.net.nntp.NNTPClient;
033import org.apache.commons.net.nntp.NNTPReply;
034import org.apache.commons.net.nntp.SimpleNNTPHeader;
035
036/**
037 * This is an example program using the NNTP package to post an article to the specified newsgroup(s). It prompts you for header information and a file name to
038 * post.
039 */
040
041public final class PostMessage {
042
043    public static void main(final String[] args) {
044        final String from;
045        final String subject;
046        String newsgroup;
047        final String fileName;
048        final String server;
049        final String organization;
050        final String references;
051        final BufferedReader stdin;
052        Reader fileReader = null;
053        final SimpleNNTPHeader header;
054        final NNTPClient client;
055
056        if (args.length < 1) {
057            System.err.println("Usage: post newsserver");
058            System.exit(1);
059        }
060
061        server = args[0];
062
063        stdin = new BufferedReader(new InputStreamReader(System.in, Charset.defaultCharset()));
064
065        try {
066            System.out.print("From: ");
067            System.out.flush();
068
069            from = stdin.readLine();
070
071            System.out.print("Subject: ");
072            System.out.flush();
073
074            subject = stdin.readLine();
075
076            header = new SimpleNNTPHeader(from, subject);
077
078            System.out.print("Newsgroup: ");
079            System.out.flush();
080
081            newsgroup = stdin.readLine();
082            header.addNewsgroup(newsgroup);
083
084            while (true) {
085                System.out.print("Additional Newsgroup <Hit enter to end>: ");
086                System.out.flush();
087
088                newsgroup = stdin.readLine();
089                if (newsgroup == null) {
090                    break;
091                }
092
093                newsgroup = newsgroup.trim();
094
095                if (newsgroup.isEmpty()) {
096                    break;
097                }
098
099                header.addNewsgroup(newsgroup);
100            }
101
102            System.out.print("Organization: ");
103            System.out.flush();
104
105            organization = stdin.readLine();
106
107            System.out.print("References: ");
108            System.out.flush();
109
110            references = stdin.readLine();
111
112            if (organization != null && !organization.isEmpty()) {
113                header.addHeaderField("Organization", organization);
114            }
115
116            if (references != null && !references.isEmpty()) {
117                header.addHeaderField("References", references);
118            }
119
120            header.addHeaderField("X-Newsreader", "NetComponents");
121
122            System.out.print("Filename: ");
123            System.out.flush();
124
125            fileName = stdin.readLine();
126
127            try {
128                fileReader = Files.newBufferedReader(Paths.get(fileName), Charset.defaultCharset());
129            } catch (final FileNotFoundException e) {
130                System.err.println("File not found. " + e.getMessage());
131                System.exit(1);
132            }
133
134            client = new NNTPClient();
135            client.addProtocolCommandListener(new PrintCommandListener(Util.newPrintWriter(System.out), true));
136
137            client.connect(server);
138
139            if (!NNTPReply.isPositiveCompletion(client.getReplyCode())) {
140                client.disconnect();
141                System.err.println("NNTP server refused connection.");
142                System.exit(1);
143            }
144
145            if (client.isAllowedToPost()) {
146                final Writer writer = client.postArticle();
147
148                if (writer != null) {
149                    writer.write(header.toString());
150                    Util.copyReader(fileReader, writer);
151                    writer.close();
152                    client.completePendingCommand();
153                }
154            }
155
156            fileReader.close();
157
158            client.logout();
159
160            client.disconnect();
161        } catch (final IOException e) {
162            e.printStackTrace();
163            System.exit(1);
164        }
165    }
166}