/*
 * 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.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.SocketException;

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

/**
 * Sample program demonstrating the use of article header and body retrieval
 */
public class ArticleReader {

    public static void main(String[] args) throws SocketException, IOException {

        if (args.length != 2 && args.length != 3 && args.length != 5) {
            System.out.println("Usage: MessageThreading <hostname> <groupname> [<article specifier> [<user> <password>]]");
            return;
        }

        String hostname = args[0];
        String newsgroup = args[1];
        // Article specifier can be numeric or Id in form <m.n.o.x@host>
        String articleSpec = args.length >= 3 ? args[2] : null;

        NNTPClient client = new NNTPClient();
        client.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out), true));
        client.connect(hostname);

        if (args.length == 5) { // Optional auth
            String user = args[3];
            String password = args[4];
            if(!client.authenticate(user, password)) {
                System.out.println("Authentication failed for user " + user + "!");
                System.exit(1);
            }
        }

        NewsgroupInfo group = new NewsgroupInfo();
        client.selectNewsgroup(newsgroup, group);

        BufferedReader br;
        String line;
        if (articleSpec != null) {
            br = (BufferedReader) client.retrieveArticleHeader(articleSpec);
        } else {
            long articleNum = group.getLastArticleLong();
            br = client.retrieveArticleHeader(articleNum);
        }
        if (br != null) {
            while((line=br.readLine()) != null) {
                System.out.println(line);
            }
            br.close();
        }
        if (articleSpec != null) {
            br = (BufferedReader) client.retrieveArticleBody(articleSpec);
        } else {
            long articleNum = group.getLastArticleLong();
            br = client.retrieveArticleBody(articleNum);
        }
        if (br != null) {
            while((line=br.readLine()) != null) {
                System.out.println(line);
            }
            br.close();
        }
    }

}

@@ -2356,16 +2356,19 @@
 eader br
+Hdr
 ;%0A      
@@ -2423,32 +2423,35 @@
 %7B%0A            br
+Hdr
  = (BufferedRead
@@ -2578,32 +2578,35 @@
 ;%0A            br
+Hdr
  = client.retrie
@@ -2650,32 +2650,35 @@
 %7D%0A        if (br
+Hdr
  != null) %7B%0A    
@@ -2691,32 +2691,35 @@
   while((line=br
+Hdr
 .readLine()) != 
@@ -2788,32 +2788,35 @@
 %7D%0A            br
+Hdr
 .close();%0A      
@@ -2811,32 +2811,63 @@
 se();%0A        %7D%0A
+        BufferedReader brBody;%0A
         if (arti
@@ -2893,22 +2893,23 @@
         
-    br
+%09brBody
  = (Buff
@@ -3050,16 +3050,20 @@
       br
+Body
  = clien
@@ -3121,16 +3121,20 @@
   if (br
+Body
  != null
@@ -3163,16 +3163,20 @@
 (line=br
+Body
 .readLin
@@ -3261,16 +3261,20 @@
       br
+Body
 .close()

Use separate BufferedReader variables to avoid resource not closed warning