Examples of net.nutch.ipc.Client$Connection

ch.ethz.ssh2.Connection
Thread that reads responses and notifies callers. Each connection owns a socket connected to a remote address. Calls are multiplexed through this socket: responses may be delivered out of order.

    
    try
    {
      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* We want to connect through a HTTP proxy */
      
      conn.setProxyData(new HTTPProxyData(proxyHost, proxyPort));
      
      // if the proxy requires basic authentication:
      // conn.setProxyData(new HTTPProxyData(proxyHost, proxyPort, "username", "secret"));
      
      /* Now connect (through the proxy) */


      conn.connect();


      /* Authenticate.
       * If you get an IOException saying something like
       * "Authentication method password not supported by the server at this stage."
       * then please check the FAQ.
       */


      boolean isAuthenticated = conn.authenticateWithPassword(username, password);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* Create a session */


      Session sess = conn.openSession();


      sess.execCommand("uname -a && date && uptime && who");


      System.out.println("Here is some information about the remote host:");


      /* 
       * This basic example does not handle stderr, which is sometimes dangerous
       * (please read the FAQ).
       */


      InputStream stdout = new StreamGobbler(sess.getStdout());


      BufferedReader br = new BufferedReader(new InputStreamReader(stdout));


      while (true)
      {
        String line = br.readLine();
        if (line == null)
          break;
        System.out.println(line);
      }


      /* Show exit status, if available (otherwise "null") */


      System.out.println("ExitCode: " + sess.getExitStatus());


      /* Close this session */


      sess.close();


      /* Close the connection */


      conn.close();


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

View Full Code Here


    try
    {
      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* Now connect */


      conn.connect();


      /* Authenticate */


      boolean isAuthenticated = conn.authenticateWithPassword(username, password);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* Create a session */


      Session sess = conn.openSession();


      sess.execCommand("echo \"Huge amounts of text on STDOUT\"; echo \"Huge amounts of text on STDERR\" >&2");


      /*
       * Advanced:
       * The following is a demo on how one can read from stdout and
       * stderr without having to use two parallel worker threads (i.e.,
       * we don't use the Streamgobblers here) and at the same time not
       * risking a deadlock (due to a filled SSH2 channel window, caused
       * by the stream which you are currently NOT reading from =).
       */


      /* Don't wrap these streams and don't let other threads work on
       * these streams while you work with Session.waitForCondition()!!!
       */


      InputStream stdout = sess.getStdout();
      InputStream stderr = sess.getStderr();


      byte[] buffer = new byte[8192];


      while (true)
      {
        if ((stdout.available() == 0) && (stderr.available() == 0))
        {
          /* Even though currently there is no data available, it may be that new data arrives
           * and the session's underlying channel is closed before we call waitForCondition().
           * This means that EOF and STDOUT_DATA (or STDERR_DATA, or both) may
           * be set together.
           */


          int conditions = sess.waitForCondition(ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA
              | ChannelCondition.EOF, 2000);


          /* Wait no longer than 2 seconds (= 2000 milliseconds) */


          if ((conditions & ChannelCondition.TIMEOUT) != 0)
          {
            /* A timeout occured. */
            throw new IOException("Timeout while waiting for data from peer.");
          }


          /* Here we do not need to check separately for CLOSED, since CLOSED implies EOF */


          if ((conditions & ChannelCondition.EOF) != 0)
          {
            /* The remote side won't send us further data... */


            if ((conditions & (ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA)) == 0)
            {
              /* ... and we have consumed all data in the local arrival window. */
              break;
            }
          }


          /* OK, either STDOUT_DATA or STDERR_DATA (or both) is set. */


          // You can be paranoid and check that the library is not going nuts:
          // if ((conditions & (ChannelCondition.STDOUT_DATA | ChannelCondition.STDERR_DATA)) == 0)
          //  throw new IllegalStateException("Unexpected condition result (" + conditions + ")");
        }


        /* If you below replace "while" with "if", then the way the output appears on the local
         * stdout and stder streams is more "balanced". Addtionally reducing the buffer size
         * will also improve the interleaving, but performance will slightly suffer.
         * OKOK, that all matters only if you get HUGE amounts of stdout and stderr data =)
         */


        while (stdout.available() > 0)
        {
          int len = stdout.read(buffer);
          if (len > 0) // this check is somewhat paranoid
            System.out.write(buffer, 0, len);
        }


        while (stderr.available() > 0)
        {
          int len = stderr.read(buffer);
          if (len > 0) // this check is somewhat paranoid
            System.err.write(buffer, 0, len);
        }
      }


      /* Close this session */


      sess.close();


      /* Close the connection */


      conn.close();


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

View Full Code Here

      this.username = username;
    }


    public void run()
    {
      Connection conn = new Connection(hostname);


      try
      {
        /*
         * 
         * CONNECT AND VERIFY SERVER HOST KEY (with callback)
         * 
         */


        String[] hostkeyAlgos = database.getPreferredServerHostkeyAlgorithmOrder(hostname);


        if (hostkeyAlgos != null)
          conn.setServerHostKeyAlgorithms(hostkeyAlgos);


        conn.connect(new AdvancedVerifier());


        /*
         * 
         * AUTHENTICATION PHASE
         * 
         */


        boolean enableKeyboardInteractive = true;
        boolean enableDSA = true;
        boolean enableRSA = true;


        String lastError = null;


        while (true)
        {
          if ((enableDSA || enableRSA) && conn.isAuthMethodAvailable(username, "publickey"))
          {
            if (enableDSA)
            {
              File key = new File(idDSAPath);


              if (key.exists())
              {
                EnterSomethingDialog esd = new EnterSomethingDialog(loginFrame, "DSA Authentication",
                    new String[] { lastError, "Enter DSA private key password:" }, true);
                esd.setVisible(true);


                boolean res = conn.authenticateWithPublicKey(username, key, esd.answer);


                if (res == true)
                  break;


                lastError = "DSA authentication failed.";
              }
              enableDSA = false; // do not try again
            }


            if (enableRSA)
            {
              File key = new File(idRSAPath);


              if (key.exists())
              {
                EnterSomethingDialog esd = new EnterSomethingDialog(loginFrame, "RSA Authentication",
                    new String[] { lastError, "Enter RSA private key password:" }, true);
                esd.setVisible(true);


                boolean res = conn.authenticateWithPublicKey(username, key, esd.answer);


                if (res == true)
                  break;


                lastError = "RSA authentication failed.";
              }
              enableRSA = false; // do not try again
            }


            continue;
          }


          if (enableKeyboardInteractive && conn.isAuthMethodAvailable(username, "keyboard-interactive"))
          {
            InteractiveLogic il = new InteractiveLogic(lastError);


            boolean res = conn.authenticateWithKeyboardInteractive(username, il);


            if (res == true)
              break;


            if (il.getPromptCount() == 0)
            {
              // aha. the server announced that it supports "keyboard-interactive", but when
              // we asked for it, it just denied the request without sending us any prompt.
              // That happens with some server versions/configurations.
              // We just disable the "keyboard-interactive" method and notify the user.


              lastError = "Keyboard-interactive does not work.";


              enableKeyboardInteractive = false; // do not try this again
            }
            else
            {
              lastError = "Keyboard-interactive auth failed."; // try again, if possible
            }


            continue;
          }


          if (conn.isAuthMethodAvailable(username, "password"))
          {
            final EnterSomethingDialog esd = new EnterSomethingDialog(loginFrame,
                "Password Authentication",
                new String[] { lastError, "Enter password for " + username }, true);


            esd.setVisible(true);


            if (esd.answer == null)
              throw new IOException("Login aborted by user");


            boolean res = conn.authenticateWithPassword(username, esd.answer);


            if (res == true)
              break;


            lastError = "Password authentication failed."; // try again, if possible


            continue;
          }


          throw new IOException("No supported authentication methods available.");
        }


        /*
         * 
         * AUTHENTICATION OK. DO SOMETHING.
         * 
         */


        Session sess = conn.openSession();


        int x_width = 90;
        int y_width = 30;


        sess.requestPTY("dumb", x_width, y_width, 0, 0, null);
        sess.startShell();


        TerminalDialog td = new TerminalDialog(loginFrame, username + "@" + hostname, sess, x_width, y_width);


        /* The following call blocks until the dialog has been closed */


        td.setVisible(true);


      }
      catch (IOException e)
      {
        //e.printStackTrace();
        JOptionPane.showMessageDialog(loginFrame, "Exception: " + e.getMessage());
      }


      /*
       * 
       * CLOSE THE CONNECTION.
       * 
       */


      conn.close();


      /*
       * 
       * CLOSE THE LOGIN FRAME - APPLICATION WILL BE EXITED (no more frames)
       *

View Full Code Here


    try
    {
      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* Now connect */


      conn.connect();


      /* Authenticate */


      boolean isAuthenticated = conn.authenticateWithPublicKey(username, keyfile, keyfilePass);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* ===== OK, now let's establish some local port forwardings ===== */
      
      /* Example Port Forwarding: -L 8080:www.ethz.ch:80 (OpenSSH notation)
       * 
       * This works by allocating a socket to listen on 8080 on the local interface (127.0.0.1).
       * Whenever a connection is made to this port (127.0.0.1:8080), the connection is forwarded
       * over the secure channel, and a connection is made to www.ethz.ch:80 from the remote
       * machine (i.e., the ssh server).
       * 
       * (the above text is based partially on the OpenSSH man page)
       */


      /* You can create as many of them as you want */
      
      LocalPortForwarder lpf1 = conn.createLocalPortForwarder(8080, "www.ethz.ch", 80);
      
      /* Now simply point your webbrowser to 127.0.0.1:8080 */
      /* (on the host where you execute this program)                         */


      /* ===== OK, now let's establish some remote port forwardings ===== */
      
      /* Example Port Forwarding: -R 127.0.0.1:8080:www.ganymed.ethz.ch:80 (OpenSSH notation)
       * 
       * Specifies that the port 127.0.0.1:8080 on the remote server is to be forwarded to the
       * given host and port on the local side.  This works by allocating a socket to listen to port
       * 8080 on the remote side (the ssh server), and whenever a connection is made to this port, the
       * connection is forwarded over the secure channel, and a connection is made to
       * www.ganymed.ethz.ch:80 by the Ganymed SSH-2 library.
       * 
       * (the above text is based partially on the OpenSSH man page)
       */


      /* You can create as many of them as you want */
      
      conn.requestRemotePortForwarding("127.0.0.1", 8080, "www.ganymed.ethz.ch", 80);


      /* Now, on the ssh server, if you connect to 127.0.0.1:8080, then the connection is forwarded
       * through the secure tunnel to the library, which in turn will forward the connection
       * to www.ganymed.ethz.ch:80. */


      /* Sleep a bit... (30 seconds) */
      sleepSomeTime(30000);


      /* Stop accepting remote connections that are being forwarded to www.ganymed.ethz.ch:80 */


      conn.cancelRemotePortForwarding(8080);


      /* Sleep a bit... (20 seconds) */
      sleepSomeTime(20000);


      /* Stop accepting connections on 127.0.0.1:8080 that are being forwarded to www.ethz.ch:80 */


      lpf1.close();
      
      /* Close the connection */


      conn.close();


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

View Full Code Here


    try
    {
      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* Now connect */


      conn.connect();


      /* Authenticate.
       * If you get an IOException saying something like
       * "Authentication method password not supported by the server at this stage."
       * then please check the FAQ.
       */


      boolean isAuthenticated = conn.authenticateWithPassword(username, password);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* Create a session */


      Session sess = conn.openSession();


      sess.execCommand("uname -a && date && uptime && who");


      System.out.println("Here is some information about the remote host:");


      /* 
       * This basic example does not handle stderr, which is sometimes dangerous
       * (please read the FAQ).
       */


      InputStream stdout = new StreamGobbler(sess.getStdout());


      BufferedReader br = new BufferedReader(new InputStreamReader(stdout));


      while (true)
      {
        String line = br.readLine();
        if (line == null)
          break;
        System.out.println(line);
      }


      /* Show exit status, if available (otherwise "null") */


      System.out.println("ExitCode: " + sess.getExitStatus());


      /* Close this session */


      sess.close();


      /* Close the connection */


      conn.close();


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

View Full Code Here


    try
    {
      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* Now connect */


      conn.connect();


      /* Authenticate */


      boolean isAuthenticated = conn.authenticateWithPassword(username, password);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* Create a session */


      Session sess = conn.openSession();


      sess.execCommand("echo \"Text on STDOUT\"; echo \"Text on STDERR\" >&2");


      InputStream stdout = new StreamGobbler(sess.getStdout());
      InputStream stderr = new StreamGobbler(sess.getStderr());
  
      BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(stdout));
      BufferedReader stderrReader = new BufferedReader(new InputStreamReader(stderr));
      
      System.out.println("Here is the output from stdout:");
  
      while (true)
      {
        String line = stdoutReader.readLine();
        if (line == null)
          break;
        System.out.println(line);
      }
      
      System.out.println("Here is the output from stderr:");
      
      while (true)
      {
        String line = stderrReader.readLine();
        if (line == null)
          break;
        System.out.println(line);
      }
      
      /* Close this session */
      
      sess.close();


      /* Close the connection */


      conn.close();


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

View Full Code Here

      if (knownHosts.exists())
        database.addHostkeys(knownHosts);


      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* Now connect and use the SimpleVerifier */


      conn.connect(new SimpleVerifier(database));


      /* Authenticate */


      boolean isAuthenticated = conn.authenticateWithPassword(username, password);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* Create a session */


      Session sess = conn.openSession();


      sess.execCommand("uname -a && date && uptime && who");


      InputStream stdout = new StreamGobbler(sess.getStdout());
      BufferedReader br = new BufferedReader(new InputStreamReader(stdout));


      System.out.println("Here is some information about the remote host:");


      while (true)
      {
        String line = br.readLine();
        if (line == null)
          break;
        System.out.println(line);
      }


      /* Close this session */


      sess.close();


      /* Close the connection */


      conn.close();


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

View Full Code Here


    try
    {
      /* Create a connection instance */


      Connection conn = new Connection(hostname);


      /* Now connect */


      conn.connect();


      /* Authenticate */


      boolean isAuthenticated = conn.authenticateWithPublicKey(username, keyfile, keyfilePass);


      if (isAuthenticated == false)
        throw new IOException("Authentication failed.");


      /* Create a session */


      Session sess = conn.openSession();


      sess.execCommand("uname -a && date && uptime && who");


      InputStream stdout = new StreamGobbler(sess.getStdout());


      BufferedReader br = new BufferedReader(new InputStreamReader(stdout));


      System.out.println("Here is some information about the remote host:");


      while (true)
      {
        String line = br.readLine();
        if (line == null)
          break;
        System.out.println(line);
      }


      /* Close this session */
      
      sess.close();


      /* Close the connection */


      conn.close();


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

View Full Code Here

    @SuppressWarnings("unused")
    final String conMethodName = conClassName + "::Connect";


    try {
      isConnected = false;
      this.setSshConnection(new Connection(pstrHostName, pintPortNumber));


    }
    catch (Exception e) {
      if (this.getSshConnection() != null)
        try {

View Full Code Here

    @SuppressWarnings("unused")
    final String conMethodName = conClassName + "::Connect";


    try {
      isConnected = false;
      this.setSshConnection(new Connection(objCO.getHost().Value(), objCO.getPort().value()));


      if (objCO.getProxy_host().IsNotEmpty()) {
        HTTPProxyData objProxy = null;
        if (objCO.getProxy_user().IsEmpty()) {
          objProxy = new HTTPProxyData(objCO.getProxy_host().Value(), objCO.getProxy_port().value());

View Full Code Here

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