(Delphi DLL) FTP Download Text File to a Stream

Demonstrates how to FTP download a text file to a Chilkat stream.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Task, Ftp2, Stream;

...

procedure TForm1.Button1Click(Sender: TObject);
var
ftp: HCkFtp2;
success: Boolean;
streamObj: HCkStream;
t: HCkTask;
line: PWideChar;

begin
// This example assumes the Chilkat FTP2 API to have been previously unlocked.
// See FTP2 Unlock Sample for sample code.

ftp := CkFtp2_Create();

CkFtp2_putHostname(ftp,'www.my-ftp-server.com');
CkFtp2_putUsername(ftp,'mFtpLogin');
CkFtp2_putPassword(ftp,'myFtpPassword');
CkFtp2_putAuthTls(ftp,True);
CkFtp2_putPassive(ftp,True);

// Connect and login to the FTP server using TLS.
success := CkFtp2_Connect(ftp);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

streamObj := CkStream_Create();

// Indicate the charset of the incoming data.
CkStream_putStringCharset(streamObj,'utf-8');

// Create a task to do the FTP download.
t := CkFtp2_GetFileToStreamAsync(ftp,'lines.txt',streamObj);
if (CkFtp2_getLastMethodSuccess(ftp) <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

// Start the task in a background thread.
CkTask_Run(t);

// Read the incoming text data using any of the streamObj Read methods.
// This example will read line-by-line.

while CkStream_getEndOfStream(streamObj) <> True do
  begin
    line := CkStream__readToCRLF(streamObj);
    if (CkStream_getLastMethodSuccess(streamObj) = True) then
      begin
        Memo1.Lines.Add(line);
      end;
  end;

CkTask_Dispose(t);

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

CkFtp2_Dispose(ftp);
CkStream_Dispose(streamObj);

end;