Pascal (Lazarus/Delphi)

SCP Download/Upload Binary Files as Encoded Strings

See more SCP Examples

Demonstrates how to upload and download binary files as encoded strings (base64, hex, etc.) using the SCP protocol (Secure Copy Protocol over SSH). Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Ssh,
  Chilkat.Scp;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  ssh: TSsh;
  hostname: string;
  port: Integer;
  scp: TScp;
  remotePath: string;
  encodedJpg: string;

begin
  success := False;

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

  ssh := TSsh.Create;

  //  Hostname may be an IP address or hostname:
  hostname := 'www.some-ssh-server.com';
  port := 22;

  //  Connect to an SSH server:
  success := ssh.Connect(hostname,port);
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  Wait a max of 5 seconds when reading responses..
  ssh.IdleTimeoutMs := 5000;

  //  Authenticate using login/password:
  success := ssh.AuthenticatePw('myLogin','myPassword');
  if (success <> True) then
    begin
      WriteLn(ssh.LastErrorText);
      Exit;
    end;

  //  Once the SSH object is connected and authenticated, we use it
  //  in our SCP object.
  scp := TScp.Create;

  success := scp.UseSsh(ssh);
  if (success <> True) then
    begin
      WriteLn(scp.LastErrorText);
      Exit;
    end;

  remotePath := 'images/starfish.jpg';

  //  Download the binary file and return as a base64 string.
  //  See <a href="http://www.cknotes.com/chilkat-binary-encoding-list/">List of Encodings</a> for a list of possible encodings.
  encodedJpg := scp.DownloadBinaryEncoded(remotePath,'base64');
  if (scp.LastMethodSuccess <> True) then
    begin
      WriteLn(scp.LastErrorText);
      Exit;
    end;

  remotePath := 'images/starfish2.jpg';

  //  Now upload from the base64 string to the SSH server.
  //  Insided the call to UploadBinaryEncoded, the base64 string is decoded,
  //  and the decoded bytes are uploaded.  The resulting starfish2.jpg on the
  //  server will be identical to the original starfish.jpg
  success := scp.UploadBinaryEncoded(remotePath,encodedJpg,'base64');
  if (success <> True) then
    begin
      WriteLn(scp.LastErrorText);
      Exit;
    end;

  WriteLn('SCP download/upload binary encoded success.');

  //  Disconnect
  ssh.Disconnect();


  ssh.Free;
  scp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.