Pascal (Lazarus/Delphi)

B-Encode a String for MIME Headers

Demonstrates the Chilkat Email.BEncodeString method, which converts the Unicode string in the first argument to the charset named in the second argument, B-encodes the resulting multibyte data, and returns the encoded string. This is the representation used for non-ASCII text in MIME header fields.

Background: MIME headers were defined to carry only plain ASCII, so non-ASCII text (accents, non-Latin scripts) must be wrapped in an "encoded-word" per RFC 2047. The B encoding is Base64-based: the text becomes something like =?utf-8?B?...?=, which mail software recognizes and decodes back to the original characters. There is also a Q (quoted-printable-style) encoding for the same purpose; B-encoding is preferred when most characters are non-ASCII.

Chilkat Pascal (Lazarus/Delphi) Downloads

Download Chilkat for Pascal (Lazarus/Delphi)

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
  email: TEmail;
  encoded: string;

begin
  //  Demonstrates the BEncodeString method, which converts a Unicode string to a specified
  //  charset, B-encodes (RFC 2047) the resulting bytes, and returns the encoded string.
  //  This is the form used for non-ASCII text in MIME header fields.

  email := TEmail.Create;

  //  B-encode a Unicode string using the utf-8 charset.
  encoded := email.BEncodeString('Cafe Meeting Notes','utf-8');

  WriteLn('B-encoded: ' + encoded);


  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.