Java Code Examples for com.jcraft.jsch.Channel#isClosed()

private void testClose(TestContext context, Consumer<Term> closer) throws Exception {
  Async async = context.async();
  termHandler = term -> {
    term.closeHandler(v -> {
      async.complete();
    });
    closer.accept(term);
  };
  startShell();
  Session session = createSession("paulo", "secret", false);
  session.connect();
  Channel channel = session.openChannel("shell");
  channel.connect();
  while (channel.isClosed()) {
    Thread.sleep(10);
  }
}
 

private static String logJsch(Channel channel, InputStream in) 
{
	StringBuilder builder = new StringBuilder();
    try {
        byte[] tmp = new byte[1024];
        while (true) {
            while (in.available() > 0) {
                int i = in.read(tmp, 0, 1024);
                if (i < 0)
                    break;
                builder.append((new String(tmp, 0, i)));
            }
            if (channel.isClosed()) {
            //	LOGGER.debug("exit-status: " + channel.getExitStatus());
                break;
            }
        }
    } catch (Exception ex) {
    	LOGGER.error(ex);
    }
    return builder.toString();
}
 

private static void logJsch(Channel channel, InputStream in) 
	{
	    try {
	        byte[] tmp = new byte[1024];
	        while (true) {
/*	            while (in.available() > 0) {
	                int i = in.read(tmp, 0, 1024);
	                if (i < 0)
	                    break;
	                LOGGER.debug(new String(tmp, 0, i));
	            }
*/	            if (channel.isClosed()) {
	            	LOGGER.debug("exit-status: " + channel.getExitStatus());
	                break;
	            }
	        }
	    } catch (Exception ex) {
	    	LOGGER.error(ex);
	    }
	}
 

private static String logJsch(Channel channel, InputStream in) 
{
	StringBuilder builder = new StringBuilder();
    try {
        byte[] tmp = new byte[1024];
        while (true) {
            while (in.available() > 0) {
                int i = in.read(tmp, 0, 1024);
                if (i < 0)
                    break;
                builder.append((new String(tmp, 0, i)));
            }
            if (channel.isClosed()) {
            //	LOGGER.debug("exit-status: " + channel.getExitStatus());
                break;
            }
        }
    } catch (Exception ex) {
    	LOGGER.error(ex);
    }
    return builder.toString();
}
 

private static String logJsch(Channel channel, InputStream in) 
{
	StringBuilder builder = new StringBuilder();
    try {
        byte[] tmp = new byte[1024];
        while (true) {
            while (in.available() > 0) {
                int i = in.read(tmp, 0, 1024);
                if (i < 0)
                    break;
                builder.append((new String(tmp, 0, i)));
            }
            if (channel.isClosed()) {
            //	LOGGER.debug("exit-status: " + channel.getExitStatus());
                break;
            }
        }
    } catch (Exception ex) {
    	LOGGER.error(ex);
    }
    return builder.toString();
}
 

/**
 * This method validates the executed command
 * 
 * @param channel
 *            SSH channel
 * @param in
 *            input stream
 * @return Error message if any

 *             If any error occurred
 */
private static String validateCommandExecution(Channel channel, InputStream in) throws IOException, InterruptedException {
	StringBuilder sb = new StringBuilder();
	byte[] tmp = new byte[Constants.ONE_ZERO_TWO_FOUR];
	while (true) {
		while (in.available() > 0) {
			int i = in.read(tmp, 0,Constants.ONE_ZERO_TWO_FOUR);
			if (i < 0){
				break;
			}
			sb.append(new String(tmp, 0, i));
		}
		if (channel.isClosed()) {
			break;
		}
		Thread.sleep(Constants.THOUSAND);
	}
	return sb.toString();
}
 

/**
 * Blocks until the given channel is close or the timout is reached
 *
 * @param channel the channel to wait for
 * @param timoutInMs the timeout
 */
private static void waitForChannelClosure(Channel channel, long timoutInMs) {
    final long start = System.currentTimeMillis();
    final long until = start + timoutInMs;
    try {
        while (!channel.isClosed() && System.currentTimeMillis() < until) {
            Thread.sleep(CLOSURE_WAIT_INTERVAL);
        }
        logger.trace("Time waited for channel closure: " + (System.currentTimeMillis() - start));
    } catch (InterruptedException e) {
        logger.trace("Interrupted", e);
    }
    if (!channel.isClosed()) {
        logger.trace("Channel not closed in timely manner!");
    }
}
 

protected JschResponse getStringFromStream(Channel channel) throws IOException,
		JSchException {
	JschResponse jschResponse = new JschResponse();
	StringBuilder response = new StringBuilder();		
	InputStream in = channel.getInputStream();
	channel.connect();
	jschResponse.setChannelId(channel.getId());
	byte[] tmp = new byte[1024];
	while (true) {
		while (in.available() > 0) {
			int i = in.read(tmp, 0, 1024);
			if (i < 0)
				break;
			response.append(new String(tmp, 0, i));
		}
		if (channel.isClosed()) {
			if (in.available() > 0)
				continue;
			jschResponse.setChannelExitStatus(channel.getExitStatus());
			break;
		}
		try {
		} catch (Exception ee) {
			LOGGER.error("Exception occured while reading stream from Channel #Id["+jschResponse.getChannelId()+"]", ee);
		}
	}
	jschResponse.setResponse(response.toString());
	return jschResponse;
}
 

/**
 * Gets the channel.
 * 
 * @param session
 *            the session
 * @param command
 *            the command
 * @return the channel
 * @throws JSchException
 *             the j sch exception
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
public static Channel getChannel(Session session, String command) throws JSchException, IOException {
	session.connect();
	Channel channel = session.openChannel("exec");

	((ChannelExec) channel).setCommand(command);
	channel.setInputStream(null);

	InputStream in = channel.getInputStream();

	channel.connect();
	((ChannelExec) channel).setErrStream(System.err);

	byte[] tmp = new byte[RemotingConstants.ONE_ZERO_TWO_FOUR];
	while (true) {
		while (in.available() > 0) {
			int i = in.read(tmp, 0, RemotingConstants.ONE_ZERO_TWO_FOUR);
			if (i < 0){
				break;
			}
		}
		if (channel.isClosed()) {
			break;
		}
	}
	return channel;
}
 

/**
 * Launch a command on the remote host and exit once the command is done.
 * 
 * @param session the session to use.
 * @param command the command to launch.
 * @return the output of the command.
 * @throws JSchException
 * @throws IOException
 */
private static String launchACommand( Session session, String command ) throws JSchException, IOException {
    Channel channel = session.openChannel("exec");
    ((ChannelExec) channel).setCommand(command);
    channel.setInputStream(null);
    ((ChannelExec) channel).setErrStream(System.err);
    InputStream in = channel.getInputStream();
    channel.connect();
    StringBuilder sb = new StringBuilder();
    byte[] tmp = new byte[1024];
    while( true ) {
        while( in.available() > 0 ) {
            int i = in.read(tmp, 0, 1024);
            if (i < 0)
                break;
            sb.append(new String(tmp, 0, i));
        }
        if (channel.isClosed()) {
            if (in.available() > 0)
                continue;
            System.out.println("exitstatus: " + channel.getExitStatus());
            break;
        }
        try {
            Thread.sleep(1000);
        } catch (Exception ee) {
        }
    }
    channel.disconnect();
    String remoteResponseStr = sb.toString().trim();
    return remoteResponseStr;
}
 

/**
 * Launch a command on the remote host and exit even if the command is not done (useful for launching daemons).
 * 
 * @param session the session to use.
 * @param command the command to launch.
 * @return the output of the command.
 * @throws JSchException
 * @throws IOException
 */
private static String launchACommandAndExit( Session session, String command ) throws JSchException, IOException {
    Channel channel = session.openChannel("exec");
    ((ChannelExec) channel).setCommand(command);
    channel.setInputStream(null);
    ((ChannelExec) channel).setErrStream(System.err);
    InputStream in = channel.getInputStream();
    channel.connect();
    StringBuilder sb = new StringBuilder();
    byte[] tmp = new byte[1024];
    while( true ) {
        while( in.available() > 0 ) {
            int i = in.read(tmp, 0, 1024);
            if (i < 0)
                break;
            sb.append(new String(tmp, 0, i));
        }
        if (channel.isClosed()) {
            if (in.available() > 0)
                continue;
            break;
        }
        try {
            if (sb.length() > 0) {
                break;
            }
            Thread.sleep(1000);
        } catch (Exception ee) {
        }
    }
    channel.disconnect();
    String remoteResponseStr = sb.toString().trim();
    return remoteResponseStr;
}
 

private String getRemoteHomePath() {
  final String getHomeCommand = "pwd";
  try {
    final Channel channel = this.remoteSession.openChannel("exec");
    ((ChannelExec) channel).setCommand(getHomeCommand);
    channel.setInputStream(null);
    final InputStream stdout = channel.getInputStream();
    channel.connect();

    byte[] tmp = new byte[1024];
    StringBuilder homePath = new StringBuilder();
    while (true) {
      while (stdout.available() > 0) {
        final int len = stdout.read(tmp, 0, 1024);
        if (len < 0) {
          break;
        }
        homePath = homePath.append(new String(tmp, 0, len, StandardCharsets.UTF_8));
      }
      if (channel.isClosed()) {
        if (stdout.available() > 0) {
          continue;
        }
        break;
      }
    }
    return homePath.toString().trim();
  } catch (final JSchException | IOException ex) {
    throw new RuntimeException("Unable to retrieve home directory from " +
        this.remoteHostName + " with the pwd command", ex);
  }
}
 

public static void main(String[] args) {

        String host = "localhost";
        String user = "user";
        int port = 2222;
        String password = "password";
        String command = "help";

        try {

            java.util.Properties config = new java.util.Properties();
            config.put("StrictHostKeyChecking", "no");
            JSch jsch = new JSch();
            Session session = jsch.getSession(user, host, port);
            session.setPassword(password);
            session.setConfig(config);
            session.connect();
            System.out.println("Connected");

            Channel channel = session.openChannel("shell");
            channel.connect();

            channel.getOutputStream().write((command + "\r").getBytes(StandardCharsets.UTF_8));
            channel.getOutputStream().flush();
            channel.setInputStream(null);

            InputStream in = channel.getInputStream();

            byte[] tmp = new byte[1024];
            while (true) {
                while (in.available() > 0) {
                    int i = in.read(tmp, 0, 1024);
                    if (i < 0) break;
                    System.out.print(new String(tmp, 0, i));
                }
                if (channel.isClosed()) {
                    System.out.println("exit-status: " + channel.getExitStatus());
                    break;
                }
                try {
                    Thread.sleep(3000);
                } catch (Exception ee) {
                }
            }
            channel.disconnect();
            session.disconnect();
            System.out.println("DONE");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 

/**
 * @param args
 */
public static void main(String[] args) {
    String host="test.journaldev.com";
    String user="my_user";
    String password="my_pwd";
    String command1="cd Apps;ls -ltr";
    try{
    	
    	java.util.Properties config = new java.util.Properties(); 
    	config.put("StrictHostKeyChecking", "no");
    	JSch jsch = new JSch();
    	Session session=jsch.getSession(user, host, 22);
    	session.setPassword(password);
    	session.setConfig(config);
    	session.connect();
    	System.out.println("Connected");
    	
    	Channel channel=session.openChannel("exec");
        ((ChannelExec)channel).setCommand(command1);
        channel.setInputStream(null);
        ((ChannelExec)channel).setErrStream(System.err);
        
        InputStream in=channel.getInputStream();
        channel.connect();
        byte[] tmp=new byte[1024];
        while(true){
          while(in.available()>0){
            int i=in.read(tmp, 0, 1024);
            if(i<0)break;
            System.out.print(new String(tmp, 0, i));
          }
          if(channel.isClosed()){
            System.out.println("exit-status: "+channel.getExitStatus());
            break;
          }
          try{Thread.sleep(1000);}catch(Exception ee){}
        }
        channel.disconnect();
        session.disconnect();
        System.out.println("DONE");
    }catch(Exception e){
    	e.printStackTrace();
    }

}
 

@Override
public void execute(Session session, EventListener listener) {
  try {
    System.out.println("1");
    Channel channel = session.openChannel("exec");
    System.out.println("2");
    InputStream in = channel.getInputStream();
    System.out.println("3");

    //((ChannelExec)channel).setCommand("df");
    //((ChannelExec)channel).setCommand("top -n 1 -b");
    //((ChannelExec)channel).setCommand("ifconfig");
    //((ChannelExec)channel).setCommand("netstat -s");
    ((ChannelExec) channel).setCommand(getCommand());

    System.out.println("4");
    channel.connect();
    System.out.println("5");

    StringBuffer strBuffer = new StringBuffer();

    byte[] tmp = new byte[1024];
    while (true) {
      while (in.available() > 0) {
        int i = in.read(tmp, 0, 1024);
        if (i < 0) break;
        strBuffer.append(new String(tmp, 0, i));
      }
      if (channel.isClosed()) {
        if (in.available() > 0) continue;
        System.out.println("exit-status: " + channel.getExitStatus());
        break;
      }
      try {
        Thread.sleep(1000);
      } catch (Exception ee) {
      }
    }

    System.out.println("6");
    //channel.disconnect();

    String results = strBuffer.toString();


    processResults(session.getHost(), session.getPort(), results, listener);

  } catch (Exception e ){
    e.printStackTrace();
  }
}