Dart

Get a Digest Message as an Email Object

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.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // 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.

  final email = CkEmail();

  try {
    email.loadEml('qa_data/eml/digest.eml');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final n = email.numDigests;
  print('NumDigests = $n');

  // Retrieve each bundled message as its own Email object.
  final digestEmail = CkEmail();
  for (var i = 0; i < n; i++) {
    email.getDigestEmail(i, digestEmail);
    print('Digest $i subject: ${digestEmail.subject}');
  }

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