Pascal (Lazarus/Delphi)

SCP Download from a Specific Directory

See more SCP Examples

Demonstrates how to download a file using the SCP protocol (Secure Copy Protocol over SSH), from a specific remote directory located on the SSH server. The remote directory can be a path relative to the HOME directory of the SSH user account, or an absolute path on the remote filesystem. Obviously, in both cases the SSH user account must have permission to open and read the file in the specified directory. 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;
  localPath: 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;

  //  This downloads a file from the "testApp/logs/" subdirectory (relative to the SSH user account's HOME directory).  
  //  For example, if the HOME directory is /Users/chilkat, then the following downloads
  //  /Users/chilkat/testApp/logs/test1.log
  remotePath := 'testApp/logs/test1.log';
  localPath := 'c:/testApp/logs/test1.log';
  success := scp.DownloadFile(remotePath,localPath);
  if (success <> True) then
    begin
      WriteLn(scp.LastErrorText);
      Exit;
    end;

  //  The following call to DownloadFile specifies an absolute file path on the SSH server:
  remotePath := '/Users/chilkat/Documents/gecko.jpg';
  localPath := 'c:/temp/images/gecko.jpg';
  success := scp.DownloadFile(remotePath,localPath);
  if (success <> True) then
    begin
      WriteLn(scp.LastErrorText);
      Exit;
    end;

  WriteLn('SCP download file 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.