Dart

Parse MIME to get Binary Data (such as GIF, JPG, or any binary file)

See more MIME Examples

Demonstrates how to parse a MIME to get binary data. This example extracts the image data for a GIF image to an in-memory byte array, and also to a file.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800";

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif";
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
zu/Oxta1rb17a6UhAK0hAPe9rb2Ec7V7a71rUpwpCL0xCJwhAOfOxta9tcatpdallM6cjMaUhK1C
IZwxELU5EK0xCLUxCN61pcacjK1rUrVaOaVKKZxCIZwxCKUxCL05CLUxAM6llO+1nMZzUr1rSrVS
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--------------080707010302060306060800--

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 sampleMime2.txt file into the MIME object.
  // (This file is available at https://www.chilkatsoft.com/testData/sampleMime2.txt )

  try {
    mime.loadMimeFile('sampleMime2.txt');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The GIF image is the 2nd sub-part located directly under the
  // top-level MIME node.  Indexing begins at 0, therefore the 2nd
  // sub-part is at index 1.

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

  // The GetBodyBinary method returns the binary bytes
  // of the part's body, automatically decoded from whatever
  // content-transfer-encoding might be used (such as base64).
  final binaryData = part2.getBodyBinary();

  // We now have the binary bytes of the GIF image in binaryData.
  // Save it to a file.
  final fac = CkFileAccess();
  try {
    fac.writeEntireFile('out1.gif', binaryData);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // An easier way to save the body content to a file,
  // assuming your application does not need to access
  // the binary data in-memory, is to call SaveBody
  try {
    part2.saveBody('out2.gif');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Finished.');
}