Java

SSH Quick/Simple Shell Session

See more SSH Examples

Demonstrates the simplified way to run multiple commands in a shell session on an SSH server. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSsh ssh = new CkSsh();

    int port = 22;
    success = ssh.Connect("the-ssh-server.com",port);
    if (success == false) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Authenticate using login/password:
    success = ssh.AuthenticatePw("theSshLogin","theSshPassword");
    if (success == false) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Start a shell session.
    int channelNum = ssh.QuickShell();
    if (channelNum < 0) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Construct a StringBuilder with multiple commands, one per line.
    // Note: The line-endings are potentially important.  Some SSH servers may
    // require either LF or CRLF line endings.  (Unix/Linux/OSX servers typically
    // use bare-LF line endings.  Windows servers likely use CRLF line endings.)
    CkStringBuilder sbCommands = new CkStringBuilder();
    sbCommands.Append("echo hello world\n");
    sbCommands.Append("date\n");
    sbCommands.Append("df\n");

    // For our last command, we're going to echo a marker string that
    // we'll use in ChannelReceiveUntilMatch below.
    // The use of single quotes around 'IS' is a trick so that the output
    // of the command is "THIS IS THE END OF THE SCRIPT", but the terminal echo
    // includes the single quotes.  This allows us to read until we see the actual
    // output of the last command.
    sbCommands.Append("echo THIS 'IS' THE END OF THE SCRIPT\n");

    // Send the commands..
    success = ssh.ChannelSendString(channelNum,sbCommands.getAsString(),"ansi");
    if (success == false) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Receive output up to our marker.
    success = ssh.ChannelReceiveUntilMatch(channelNum,"THIS IS THE END OF THE SCRIPT","ansi",true);

    // Send an EOF to indicate no more commands will be sent.
    // For brevity, we're not checking the return values of each method call.
    // Your code should check the success/failure of each call.
    success = ssh.ChannelSendEof(channelNum);

    // Close the channel.
    // It is important to close the channel only after receiving the desired output.
    success = ssh.ChannelSendClose(channelNum);

    // Get any remaining output..
    success = ssh.ChannelReceiveToClose(channelNum);

    // Get the complete output for all the commands in the session.
    System.out.println("--- output ----");
    System.out.println(ssh.getReceivedText(channelNum,"ansi"));

    // Here's our actual sample output:

    // 	Last login: Thu Dec 22 20:19:09 2016 from chilkat13
    // 
    // 	echo hello world
    // 	date
    // 	df
    // 	echo THIS 'IS' THE END OF THE SCRIPT
    // 	chilkatosx:~ chilkat$ echo hello world
    // 	hello world
    // 	chilkatosx:~ chilkat$ date
    // 	Thu Dec 22 20:30:48 CST 2016
    // 	chilkatosx:~ chilkat$ df
    // 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
    // 	/dev/disk2    2176716032 265768928 1910435104    13% 33285114 238804388   12%   /
    // 	devfs                383       383          0   100%      664         0  100%   /dev
    // 	map -hosts             0         0          0   100%        0         0  100%   /net
    // 	map auto_home          0         0          0   100%        0         0  100%   /home
    // 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome
    // 	chilkatosx:~ chilkat$ echo THIS 'IS' THE END OF THE SCRIPT
    // 	THIS IS THE END OF THE SCRIPT
    // 	chilkatosx:~ chilkat$ 
  }
}