Delphi ActiveX

SFTP Read Text File to String

See more SFTP Examples

Demonstrates how to download a text file from an SSH server directly into a string variable. 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;
sftp: TChilkatSFtp;
hostname: WideString;
port: Integer;
handle: WideString;
bFollowLinks: Integer;
bIsHandle: Integer;
numBytes: Integer;
charset: WideString;
fileContents: WideString;

begin
success := 0;

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

sftp := TChilkatSFtp.Create(Self);

// Set some timeouts, in milliseconds:
sftp.ConnectTimeoutMs := 5000;
sftp.IdleTimeoutMs := 15000;

// Connect to the SSH server.  
// The standard SSH port = 22
// The hostname may be a hostname or IP address.
hostname := 'sftp.example.com';
port := 22;
success := sftp.Connect(hostname,port);
if (success <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

// Authenticate with the SSH server.  Chilkat SFTP supports
// both password-based authenication as well as public-key
// authentication.  This example uses password authenication.
success := sftp.AuthenticatePw('myLogin','myPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

// After authenticating, the SFTP subsystem must be initialized:
success := sftp.InitializeSftp();
if (success <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

// Open a file on the server:

handle := sftp.OpenFile('hamlet.xml','readOnly','openExisting');
if (sftp.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

// Get the total size of this file (in bytes)
bFollowLinks := 0;
bIsHandle := 1;

// bFollowLinks is ignored because we are passing a handle
// and not a remote filename.
// There are alternative methods for handling file sizes
// greater than 32-bit.  (See the reference documentation.)
numBytes := sftp.GetFileSize32(handle,bFollowLinks,bIsHandle);
if (numBytes < 0) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

// The charset indicates the character encoding of the text
// file on the SSH server.   Setting the charset correctly
// allows the Chilkat SFTP component to correctly interpret
// the bytes that represent the characters.

charset := 'ansi';

fileContents := sftp.ReadFileText(handle,numBytes,charset);
if (sftp.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end
else
  begin
    Memo1.Lines.Add('Received file:');
    Memo1.Lines.Add(fileContents);
  end;

// Close the file.
success := sftp.CloseHandle(handle);
if (success <> 1) then
  begin
    Memo1.Lines.Add(sftp.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Success.');
end;