Pascal (Lazarus/Delphi)

Q-Encode a String for MIME Headers

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

Background: RFC 2047 defines two "encoded-word" schemes for putting non-ASCII text in headers: B (Base64) and Q (quoted-printable-style). Q-encoding leaves plain ASCII mostly readable and escapes only the special bytes, producing output like =?utf-8?Q?Caf=C3=A9?=. It is the better choice when text is mostly ASCII with a few accented characters, whereas B-encoding (BEncodeString) is more compact when most characters are non-ASCII.

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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 QEncodeString method, which converts a Unicode string to a specified
  //  charset, Q-encodes (RFC 2047) the resulting bytes, and returns the encoded string.
  //  This is one of the forms used for non-ASCII text in MIME header fields.

  email := TEmail.Create;

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

  WriteLn('Q-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.