Package edu.stanford.nlp.ie

Examples of edu.stanford.nlp.ie.NERServer$Session


      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();

 
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      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();

 
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         *
         * 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 */

 
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      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();

 
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      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();

 
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      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();

 
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      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();

 
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   * \return boolean
   *
   * @return
   */
  public boolean remoteIsWindowsShell() {
    Session objSSHSession = null;
    flgIsRemoteOSWindows = false;

    try {
      // TODO the testcommand should be defined by an option
      String checkShellCommand = "echo %ComSpec%";
      logger.debug("Opening new session...");
      objSSHSession = this.getSshConnection().openSession();
      logger.debug("Executing command " + checkShellCommand);
      objSSHSession.execCommand(checkShellCommand);

      logger.debug("output to stdout for remote command: " + checkShellCommand);
      ipsStdOut = new StreamGobbler(objSSHSession.getStdout());
      ipsStdErr = new StreamGobbler(objSSHSession.getStderr());
      BufferedReader stdoutReader = new BufferedReader(new InputStreamReader(ipsStdOut));
      String stdOut = "";
      while (true) {
        String line = stdoutReader.readLine();
        if (line == null)
          break;
        logger.debug(line);
        stdOut += line;
      }
      logger.debug("output to stderr for remote command: " + checkShellCommand);
      BufferedReader stderrReader = new BufferedReader(new InputStreamReader(ipsStdErr));
      while (true) {
        String line = stderrReader.readLine();
        if (line == null)
          break;
        logger.debug(line);
      }
      // TODO The expected result-string for testing the os should be defined by an option
      if (stdOut.indexOf("cmd.exe") > -1) {
        logger.debug("Remote shell is a Windows shell.");
        flgIsRemoteOSWindows = true;
        return true;
      }
      else {
        logger.debug("Remote shell is a Linux/Unix shell.");
      }
    }
    catch (Exception e) {
      logger.debug("Failed to check if remote system is windows shell: " + e);
    }
    finally {
      if (objSSHSession != null)
        try {
          objSSHSession.close();
        }
        catch (Exception e) {
          logger.debug("Failed to close session: ", e);
        }
    }
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    }

    public void cancelTheSession() {
        cancelIt = true;
        mSessionLock.lock();
        final Session thisSession;
        try {
            thisSession = sess;
            sess = null;
        } finally {
            mSessionLock.unlock();
        }
        if (thisSession != null) {
            thisSession.close();
        }
    }
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    private void openSshSession(final ConnectionTimeout connectionTimeout)
            throws IOException {
        /* it may hang here if we lost connection, so it will be
         * interrupted after a timeout. */
        final Session newSession = connectionThread.getConnection().openSession();
        mSessionLock.lock();
        try {
            sess = newSession;
        } finally {
            mSessionLock.unlock();
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