Dart

Serialize MIME to BinData

Demonstrates the Chilkat Mime.GetMimeBd method, which serializes the complete MIME entity and appends its bytes to a BinData. The only argument is the BinData; existing bytes are preserved.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is the byte-exact serializer — the right choice when the MIME carries binary content such as an image or an 8-bit-encoded part, where routing the output through a text string could corrupt it. The result is a faithful byte stream you can write to a file, transmit, or hash. It pairs with LoadMimeBd for lossless round-tripping of binary MIME.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Mime.GetMimeBd method, which serializes the complete MIME entity and appends
  // its bytes to a BinData.  The only argument is the BinData.  Use this when arbitrary binary body
  // bytes must not pass through a text string.

  final mime = CkMime();

  try {
    mime.setBodyFromFile('qa_data/photo.jpg');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Append the serialized MIME bytes to a BinData.  Existing bytes are preserved.
  final bd = CkBinData();
  try {
    mime.getMimeBd(bd);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Serialized ${bd.numBytes} bytes.');
}