(Delphi DLL) Get the text body content of a MIME part.

Explains and demonstrates the GetBodyEncoded and GetBodyDecoded methods. This example uses the MIME test data located at http://www.chilkatsoft.com/testData/sampleMime1.txt

The sampleMime1.txt contains:

Content-Type: multipart/mixed;
 boundary="------------070404010201060604000708";

This is a multi-part message in MIME format.

--------------070404010201060604000708
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset="utf-8";

Falsches =C3=9Cben von Xylophonmusik qu=C3=A4lt jeden gr=C3=B6=C3=9Feren Zwe=
rg.
--------------070404010201060604000708
Content-Transfer-Encoding: base64
Content-Type: text/plain; charset="utf-8";

RmFsc2NoZXMgw5xiZW4gdm9uIFh5bG9waG9ubXVzaWsgcXXDpGx0IGplZGVuIGdyw7bDn2VyZW4g
Wndlcmcu

--------------070404010201060604000708
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset="iso-8859-1";

Falsches Üben von Xylophonmusik quält jeden größeren Zwerg.
--------------070404010201060604000708--

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
mime: HCkMime;
success: Boolean;
part1: HCkMime;
part2: HCkMime;
part3: HCkMime;

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

mime := CkMime_Create();

// Load the sampleMime1.txt file into the MIME object.
// (This file is available at http://www.chilkatsoft.com/testData/sampleMime1.txt )

success := CkMime_LoadMimeFile(mime,'sampleMime1.txt');
if (success = False) then
  begin
    Memo1.Lines.Add(CkMime__lastErrorText(mime));
    Exit;
  end;

// The sampleMime1.txt is a MIME document with a top-level 
// multipart/mixed containing 3 sub-parts, each of which has the 
// same body text but with different content-transfer-encodings and 
// using different character encodings (utf-8 and iso-8859-1).

// Calling mime.GetBodyEncoded or mime.GetBodyDecoded on the 
// top-level multipart/mixed MIME object will return an empty string.
// It is because the "body" of a multipart MIME object is always empty.
// A multipart MIME object contains sub-parts (each a MIME object),
// and it is only the leaf-objects that can have non-empty bodies.

// Get GetBodyDecoded method returns the body text decoded
// from whatever the content-transfer-encoding may be, and
// converted from whatever charset encoding might be used.
// In this case, calling GetBodyDecoded on each of the three
// sub-parts will return the same string.
// To demonstrate:

part1 := CkMime_GetPart(mime,0);
Memo1.Lines.Add(CkMime__getBodyDecoded(part1));

part2 := CkMime_GetPart(mime,1);
Memo1.Lines.Add(CkMime__getBodyDecoded(part2));

part3 := CkMime_GetPart(mime,2);
Memo1.Lines.Add(CkMime__getBodyDecoded(part3));

// The GetBodyEncoded method will NOT decode from 
// whatever content-transfer-encoding is used.  However, it will
// convert from whatever internal character encoding
// may be used to return a string appropriate for the calling
// programming language (for example, in .NET or any language
// using ActiveX, all strings are Unicode..)
Memo1.Lines.Add(CkMime__getBodyEncoded(part1));
Memo1.Lines.Add(CkMime__getBodyEncoded(part2));
Memo1.Lines.Add(CkMime__getBodyEncoded(part3));

CkMime_Dispose(part1);
CkMime_Dispose(part2);
CkMime_Dispose(part3);

CkMime_Dispose(mime);

end;