Delphi ActiveX

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. Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
ssh: TChilkatSsh;
port: Integer;
channelNum: Integer;
sbCommands: TChilkatStringBuilder;

begin
success := 0;

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

ssh := TChilkatSsh.Create(Self);

port := 22;
success := ssh.Connect('the-ssh-server.com',port);
if (success = 0) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

// Authenticate using login/password:
success := ssh.AuthenticatePw('theSshLogin','theSshPassword');
if (success = 0) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

// Start a shell session.
channelNum := ssh.QuickShell();
if (channelNum < 0) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

// 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.)
sbCommands := TChilkatStringBuilder.Create(Self);
sbCommands.Append('echo hello world' + #10);
sbCommands.Append('date' + #10);
sbCommands.Append('df' + #10);

// 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' + #10);

// Send the commands..
success := ssh.ChannelSendString(channelNum,sbCommands.GetAsString(),'ansi');
if (success = 0) then
  begin
    Memo1.Lines.Add(ssh.LastErrorText);
    Exit;
  end;

// Receive output up to our marker.
success := ssh.ChannelReceiveUntilMatch(channelNum,'THIS IS THE END OF THE SCRIPT','ansi',1);

// 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.
Memo1.Lines.Add('--- output ----');
Memo1.Lines.Add(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$ 
end;