Example usage for org.apache.commons.net.nntp NNTPClient selectNewsgroup

Introduction

In this page you can find the example usage for org.apache.commons.net.nntp NNTPClient selectNewsgroup.

Prototype

public boolean selectNewsgroup(String newsgroup, NewsgroupInfo info) throws IOException 

Source Link

Document

Select the specified newsgroup to be the target of for future article retrieval and posting operations.

Usage

From source file:examples.nntp.ArticleReader.java

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

    if (args.length != 2 && args.length != 3 && args.length != 5) {
        System.out.println(//from   w  w w.j  a  v  a 2s .c  o  m
                "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();
    }
}

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From source file:examples.nntp.MessageThreading.java

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

    if (args.length != 2 && args.length != 4) {
        System.out.println("Usage: MessageThreading <hostname> <groupname> [<user> <password>]");
        return;/*from   w  w  w.j  av  a2  s  .c  o  m*/
    }

    String hostname = args[0];
    String newsgroup = args[1];

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

    if (args.length == 4) { // Optional auth
        String user = args[2];
        String password = args[3];
        if (!client.authenticate(user, password)) {
            System.out.println("Authentication failed for user " + user + "!");
            System.exit(1);
        }
    }

    String fmt[] = client.listOverviewFmt();
    if (fmt != null) {
        System.out.println("LIST OVERVIEW.FMT:");
        for (String s : fmt) {
            System.out.println(s);
        }
    } else {
        System.out.println("Failed to get OVERVIEW.FMT");
    }
    NewsgroupInfo group = new NewsgroupInfo();
    client.selectNewsgroup(newsgroup, group);

    long lowArticleNumber = group.getFirstArticleLong();
    long highArticleNumber = lowArticleNumber + 5000;

    System.out
            .println("Retrieving articles between [" + lowArticleNumber + "] and [" + highArticleNumber + "]");
    Iterable<Article> articles = client.iterateArticleInfo(lowArticleNumber, highArticleNumber);

    System.out.println("Building message thread tree...");
    Threader threader = new Threader();
    Article root = (Article) threader.thread(articles);

    Article.printThread(root, 0);
}

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From source file:org.apache.commons.net.examples.nntp.ArticleReader.java

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

    if (args.length != 2 && args.length != 3 && args.length != 5) {
        System.out.println(//from   w ww .j av a2 s . c  o  m
                "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 brHdr;
    String line;
    if (articleSpec != null) {
        brHdr = (BufferedReader) client.retrieveArticleHeader(articleSpec);
    } else {
        long articleNum = group.getLastArticleLong();
        brHdr = client.retrieveArticleHeader(articleNum);
    }
    if (brHdr != null) {
        while ((line = brHdr.readLine()) != null) {
            System.out.println(line);
        }
        brHdr.close();
    }
    BufferedReader brBody;
    if (articleSpec != null) {
        brBody = (BufferedReader) client.retrieveArticleBody(articleSpec);
    } else {
        long articleNum = group.getLastArticleLong();
        brBody = client.retrieveArticleBody(articleNum);
    }
    if (brBody != null) {
        while ((line = brBody.readLine()) != null) {
            System.out.println(line);
        }
        brBody.close();
    }
}

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From source file:org.ossmeter.platform.communicationchannel.nntp.local.NntpUtil.java

public static NewsgroupInfo selectNewsgroup(NNTPClient client, NntpNewsGroup newsgroup) {
    String newsgroupName = newsgroup.getUrl().substring(newsgroup.getUrl().lastIndexOf("/") + 1);
    NewsgroupInfo newsgroupInfo = new NewsgroupInfo();
    try {//from  w w w . j  a va2  s  .  c  o  m
        client.selectNewsgroup(newsgroupName, newsgroupInfo);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        System.err.println("IOException while selecting newsgroup: '" + newsgroupName + "': " + e.getMessage());
    }
    return newsgroupInfo;
}

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From source file:org.ossmeter.platform.communicationchannel.nntp.NntpUtil.java

public static NewsgroupInfo selectNewsgroup(NNTPClient client, NntpNewsGroup newsgroup) {
    String newsgroupName = newsgroup.getNewsGroupName();//newsgroup.getUrl().substring(newsgroup.getUrl().lastIndexOf("/") + 1);
    NewsgroupInfo newsgroupInfo = new NewsgroupInfo();
    try {/*ww w .j a  v a2  s. co  m*/
        client.selectNewsgroup(newsgroupName, newsgroupInfo);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        System.err.println("IOException while selecting newsgroup: '" + newsgroupName + "': " + e.getMessage());
        e.printStackTrace();
    }
    return newsgroupInfo;
}

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From source file:org.rssowl.contrib.internal.nntp.NewsGroupHandler.java

public Pair<IFeed, IConditionalGet> reload(URI link, IProgressMonitor monitor, Map<Object, Object> properties)
        throws CoreException {
    IModelFactory factory = Owl.getModelFactory();

    /* Create a new empty feed from the existing one */
    IFeed feed = factory.createFeed(null, link);

    /* Retrieve last article pointer */
    Integer lastArticleId = getLastArticleId(properties);

    /* Create a new HttpClient */
    NNTPClient client = new NNTPClient();

    try {//from   w  ww  . ja v  a 2s  .c om

        /* Support early cancellation */
        if (monitor.isCanceled())
            return null;

        /* Connect to Server */
        if (link.getPort() != -1)
            client.connect(link.getHost(), link.getPort());
        else
            client.connect(link.getHost());

        /* Set Timeout */
        setTimeout(client, properties);

        /* Support early cancellation */
        if (monitor.isCanceled())
            return null;

        /* Authentication if provided */
        setupAuthentication(link, client);

        /* Check Authentication Required */
        checkAuthenticationRequired(client);

        /* Support early cancellation */
        if (monitor.isCanceled())
            return null;

        /* Enable Reader Mode */
        client.sendCommand(MODE_READER);

        /* Support early cancellation */
        if (monitor.isCanceled())
            return null;

        /* Select Newsgroup */
        String newsgroup = link.getPath().replace("/", "");
        NewsgroupInfo groupInfo = new NewsgroupInfo();
        boolean selected = client.selectNewsgroup(newsgroup, groupInfo);

        /* Check Authentication Required */
        checkAuthenticationRequired(client);

        /* Check Newsgroup Selected */
        if (!selected)
            throwConnectionException("Unable to select Newsgroup", client);

        /* Support early cancellation */
        if (monitor.isCanceled())
            return null;

        /* First reload: Retrieve an initial amount of News */
        if (lastArticleId == null) {

            /* Set Article Pointer to last Article */
            int status = client.stat(groupInfo.getLastArticle());
            if (status != STATUS_ARTICLE_POINTER_OK)
                throwConnectionException("Unable to retrieve any News", client);

            /* Retrieve initial news */
            for (int i = 0; i < INITIAL_NEWS && !monitor.isCanceled(); i++) {
                createNews(client.retrieveArticle(), feed, monitor);

                /* Goto previous news if provided */
                int result = client.last();
                if (result != STATUS_ARTICLE_POINTER_OK)
                    break;
            }
        }

        /* Subsequent reload: Set pointer to last retrieved News */
        else {

            /* Set Article Pointer to last retrieved News */
            int status = client.stat(lastArticleId);
            if (status != STATUS_ARTICLE_POINTER_OK)
                throwConnectionException("Unable to retrieve any News", client);

            /* Retrieve all the following News */
            while (client.next() == STATUS_ARTICLE_POINTER_OK && !monitor.isCanceled())
                createNews(client.retrieveArticle(), feed, monitor);
        }

        /* Remember last article's ID */
        lastArticleId = groupInfo.getLastArticle();
    }

    /* Wrap Exceptions */
    catch (IOException e) {
        throw new ConnectionException(Activator.createErrorStatus(e.getMessage(), e));
    }

    /* Disconnect */
    finally {
        try {
            if (client.isConnected())
                client.disconnect();
        } catch (IOException e) {
            throw new ConnectionException(Activator.createErrorStatus(e.getMessage(), e));
        }
    }

    /* Create Conditional Get Object */
    IConditionalGet conditionalGet = null;
    if (lastArticleId != null)
        conditionalGet = factory.createConditionalGet(null, link, String.valueOf(lastArticleId));

    return Pair.create(feed, conditionalGet);
}

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