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Pascal (Lazarus/Delphi)

Get a Digest Message as an Email Object

See more Email Object Examples

Demonstrates the Chilkat Email.GetDigestEmail method, which copies the Nth digest email contained within a multipart/digest into another Email object. The first digest is at index 0; the NumDigests property gives the count. This example loads a digest email and lists each bundled message's subject.

Background: A multipart/digest packs many separate emails into one carrier message — historically used by mailing lists to send a single daily bundle of that day's posts. GetDigestEmail unpacks each member into a full Email object so it can be read or processed individually. This differs from GetAttachedEmail, which extracts messages attached to an ordinary email rather than the members of a digest.

Chilkat Pascal (Lazarus/Delphi) Downloads

Pascal (Lazarus/Delphi)
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.Email;

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

procedure RunDemo;
var
  success: Boolean;
  email: TEmail;
  n: Integer;
  digestEmail: TEmail;
  i: Integer;

begin
  success := False;

  //  Demonstrates the GetDigestEmail method, which copies the Nth digest email contained
  //  within a multipart/digest into another Email object.  The first digest is at index 0;
  //  use the NumDigests property for the count.

  email := TEmail.Create;

  success := email.LoadEml('qa_data/eml/digest.eml');
  if (success = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  n := email.NumDigests;
  WriteLn('NumDigests = ' + n);

  //  Retrieve each bundled message as its own Email object.
  digestEmail := TEmail.Create;

  for i := 0 to n - 1 do
    begin
      success := email.GetDigestEmail(i,digestEmail);
      WriteLn('Digest ' + i + ' subject: ' + digestEmail.Subject);
    end;

  //  Note: The path "qa_data/..." is a relative local filesystem path,
  //  relative to the current working directory of the running application.


  email.Free;
  digestEmail.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.