Get IMAP Attachment Sizes

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Demonstrates the Chilkat Imap.GetMailAttachSize method, which returns the size in bytes of an attachment. The first argument is the Email and the second is the zero-based attachment index. This example fetches headers only and prints each attachment's name and size.

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.Imap,
  Chilkat.Email;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  imap: TImap;
  headersOnly: Boolean;
  useUid: Boolean;
  seqNum: Integer;
  email: TEmail;
  numAttach: Integer;
  i: Integer;
  fname: string;
  sz: Integer;

begin
  success := False;

  //  Demonstrates the Imap.GetMailAttachSize method, which returns the size in bytes of an
  //  attachment.  The 1st argument is the Email and the 2nd is the zero-based attachment index.

  imap := TImap.Create;

  imap.Ssl := True;
  imap.Port := 993;

  success := imap.Connect('imap.example.com');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;
  success := imap.Login('user@example.com','myPassword');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  success := imap.SelectMailbox('Inbox');
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  //  Fetch only the message headers.  Attachment bodies are NOT downloaded, but the ckx-imap-*
  //  metadata describing the attachments is present, so the attachment info methods still work.
  headersOnly := True;
  useUid := False;
  seqNum := 1;
  email := TEmail.Create;
  success := imap.FetchEmail(headersOnly,seqNum,useUid,email);
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;

  numAttach := imap.GetMailNumAttach(email);

  for i := 0 to numAttach - 1 do
    begin
      fname := imap.GetMailAttachFilename(email,i);
      if (imap.LastMethodSuccess = False) then
        begin
          WriteLn(imap.LastErrorText);
          Exit;
        end;
      sz := imap.GetMailAttachSize(email,i);
      WriteLn(fname + ': ' + sz + ' bytes');
    end;

  success := imap.Disconnect();
  if (success = False) then
    begin
      WriteLn(imap.LastErrorText);
      Exit;
    end;


  imap.Free;
  email.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.