Dart Requires Chilkat v11.0.0+

Get the text body content of a MIME part.

See more MIME Examples

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--

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final mime = CkMime();

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

  try {
    mime.loadMimeFile('sampleMime1.txt');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // 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:
  final part1 = CkMime();
  try {
    mime.partAt(0, part1);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(part1.getBodyDecoded());

  final part2 = CkMime();
  try {
    mime.partAt(1, part2);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(part2.getBodyDecoded());

  final part3 = CkMime();
  try {
    mime.partAt(2, part3);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(part3.getBodyDecoded());

  // 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..)
  print(part1.getBodyEncoded());
  print(part2.getBodyEncoded());
  print(part3.getBodyEncoded());
}