/*
* Copyright 2001-2004 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;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import org.apache.commons.net.io.DotTerminatedMessageReader;
import org.apache.commons.net.nntp.NNTPClient;
import org.apache.commons.net.nntp.NewsgroupInfo;
public class ExtendedNNTPOps {
// simple class that encapsulates some basic info about an NNTP article
class Article {
private int articleNumber;
private String subject;
private String date;
private String articleId;
private String from;
private StringBuffer header;
public Article()
{
header = new StringBuffer();
}
public void addHeaderField(String name, String val) {
header.append(name);
header.append(": ");
header.append(val);
header.append('\n');
}
public String getArticleId() {
return articleId;
}
public int getArticleNumber() {
return articleNumber;
}
public String getDate() {
return date;
}
public String getFrom() {
return from;
}
public String getSubject() {
return subject;
}
public void setArticleId(String string) {
articleId = string;
}
public void setArticleNumber(int i) {
articleNumber = i;
}
public void setDate(String string) {
date = string;
}
public void setFrom(String string) {
from = string;
}
public void setSubject(String string) {
subject = string;
}
}
NNTPClient client;
public ExtendedNNTPOps() {
client = new NNTPClient();
client.addProtocolCommandListener(new PrintCommandListener(
new PrintWriter(System.out)));
}
private Article[] getArticleInfo(int lowArticleNumber,
int highArticleNumber)
throws IOException
{
Reader reader = null;
Article[] articles = new Article[0];
reader = (DotTerminatedMessageReader)
client.retrieveArticleInfo(lowArticleNumber, highArticleNumber);
if (reader != null) {
String theInfo = readerToString(reader);
StringTokenizer st = new StringTokenizer(theInfo, "\n");
// Extract the article information
// Mandatory format (from NNTP RFC 2980) is :
// Subject\tAuthor\tDate\tID\tReference(s)\tByte Count\tLine Count
int count = st.countTokens();
articles = new Article[count];
int index = 0;
while (st.hasMoreTokens()) {
StringTokenizer stt = new StringTokenizer(st.nextToken(), "\t");
Article article = new Article();
article.setArticleNumber(Integer.parseInt(stt.nextToken()));
article.setSubject(stt.nextToken());
article.setFrom(stt.nextToken());
article.setDate(stt.nextToken());
article.setArticleId(stt.nextToken());
article.addHeaderField("References", stt.nextToken());
articles[index++] = article;
}
} else {
return null;
}
return articles;
}
private String readerToString(Reader reader)
{
String temp;
StringBuffer sb = null;
BufferedReader bufReader = new BufferedReader(reader);
sb = new StringBuffer();
try
{
temp = bufReader.readLine();
while (temp != null) {
sb.append(temp);
sb.append("\n");
temp = bufReader.readLine();
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
public void demo(String host, String user, String password) {
try {
client.connect(host);
// AUTHINFO USER/AUTHINFO PASS
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);
int lowArticleNumber = testGroup.getFirstArticle();
int highArticleNumber = testGroup.getLastArticle();
Article[] articles =
getArticleInfo(lowArticleNumber, highArticleNumber);
for(int i =0; i < articles.length; ++i)
{
System.out.println(articles[i].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;
if(args.length != 3) {
System.err.println(
"usage: ExtendedNNTPOps nntpserver username password");
System.exit(1);
}
ops = new ExtendedNNTPOps();
ops.demo(args[0], args[1], args[2]);
}
}
/* Emacs configuration
* Local variables: **
* mode: java **
* c-basic-offset: 4 **
* indent-tabs-mode: nil **
* End: **
*/