Delphi ActiveX

Set FTP Connection and Read Timeouts

Demonstrates the timeout properties ConnectTimeout, ReadTimeout, and IdleTimeoutMs.

Background: The three timeouts guard different phases: ConnectTimeout (in seconds) bounds how long a connection attempt blocks so an unreachable server fails promptly; ReadTimeout (seconds) limits how long a data connection may stall without new data; and IdleTimeoutMs (milliseconds) caps a lack of forward progress overall. Tuning them prevents a hung server or flaky link from freezing an automated job indefinitely.

Chilkat Delphi ActiveX Downloads

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Delphi ActiveX

var
success: Integer;
ftp: TChilkatFtp2;

begin
success := 0;

ftp := TChilkatFtp2.Create(Self);

ftp.Hostname := 'ftp.example.com';
ftp.Username := 'myFtpLogin';

//  Maximum seconds to wait for the TCP connection to be accepted.
ftp.ConnectTimeout := 15;

//  Maximum seconds a data connection may go without receiving more data before timing out.
ftp.ReadTimeout := 30;

//  Maximum milliseconds without a control-channel response or forward progress before failing.
ftp.IdleTimeoutMs := 20000;

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
ftp.Password := 'myPassword';

success := ftp.Connect();
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Connected with custom timeouts.');

success := ftp.Disconnect();
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;