Delphi DLL

SFTP Get Size of File on Server

See more SFTP Examples

Demonstrates how to get the size of an existing file on the server. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
sftp: HCkSFtp;
hostname: PWideChar;
port: Integer;
bFollowLinks: Boolean;
bIsHandle: Boolean;
fileSize: Integer;
fileSizeStr: PWideChar;
handle: PWideChar;

begin
success := False;

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

sftp := CkSFtp_Create();

// Set some timeouts, in milliseconds:
CkSFtp_putConnectTimeoutMs(sftp,5000);
CkSFtp_putIdleTimeoutMs(sftp,10000);

// 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 := CkSFtp_Connect(sftp,hostname,port);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    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 := CkSFtp_AuthenticatePw(sftp,'myLogin','myPassword');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

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

// Assuming we know the file size won't be too large, we get the size as a 32-bit integer.
// For SFTP, the remote file path is always either a path relative to the HOME directory of the user account, or an absolute path on the server.
bFollowLinks := True;
bIsHandle := False;
fileSize := CkSFtp_GetFileSize32(sftp,'someDir/someFile.dat',bFollowLinks,bIsHandle);
if (fileSize < 0) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;
Memo1.Lines.Add('file size = ' + IntToStr(fileSize));

// If the file size might be too large for a 32-bit signed integer, then get the size as a decimal string.
// You can convert the string to a 64-bit integer in your programming language.
fileSizeStr := CkSFtp__getFileSizeStr(sftp,'someDir/someFile.dat',bFollowLinks,bIsHandle);
if (CkSFtp_getLastMethodSuccess(sftp) = False) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;
Memo1.Lines.Add('file size = ' + fileSizeStr);

// You can alternatively get the size with an open file handle.
handle := CkSFtp__openFile(sftp,'someDir/someFile.dat','readOnly','openExisting');
if (CkSFtp_getLastMethodSuccess(sftp) <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

// Get the size using the handle.
bIsHandle := True;
fileSize := CkSFtp_GetFileSize32(sftp,'someDir/someFile.dat',bFollowLinks,bIsHandle);
if (fileSize < 0) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;
Memo1.Lines.Add('file size = ' + IntToStr(fileSize));

// -----------------------------------------------------------------------------
// Don't forget to close the file handle.
// Otherwise open handles will accumulate on the server until eventually a limit
// is reached and the server will fail on a call to OpenFile.
// -----------------------------------------------------------------------------

// Close the file.
success := CkSFtp_CloseHandle(sftp,handle);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkSFtp__lastErrorText(sftp));
    Exit;
  end;

CkSFtp_Dispose(sftp);

end;