Dart Requires Chilkat v11.0.0+

Extract Files from Binary SOAP MTOM MIME

See more MIME Examples

This example demonstrates how to extract files from a binary SOAP MTOM MIME document. Dart

import 'package:chilkat/chilkat.dart';

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

  final mime = CkMime();

  // In this example, we have a MIME file containing 8bit (non-encoded) binary data,
  // and it is what I call "headless".  MIME is headless when it omits
  // the top-level header.  The file we have here begins with the first
  // boundary string.

  // The structure the MIME to be loaded is:

  // multipart/mixed (inferred because it is headless)
  //     application/xop+xml
  //     image/jpeg
  //     image/gif
  //     image/gif
  // 

  try {
    mime.loadMimeFile('qa_data/mime/headless_binary_soap_mtom_mime.mim');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // The MIME file loaded in this example contains this:

  // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
  // Content-Type: application/xop+xml; charset=UTF-8; type="application/soap+xml"
  // Content-Transfer-Encoding: binary
  // Content-ID: <root.message@cxf.apache.org>
  // 
  // <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"><soap:Body> ... </soap:Body></soap:Envelope>
  // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
  // Content-Type: image/jpeg
  // Content-Transfer-Encoding: binary
  // Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1496@cxf.apache.org>
  // Content-Disposition: attachment;name="-2049913191"
  // 
  // BINARY DATA HERE...
  // 
  // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
  // Content-Type: image/gif
  // Content-Transfer-Encoding: binary
  // Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1497@cxf.apache.org>
  // Content-Disposition: attachment;name="-2049913188"
  // 
  // BINARY DATA HERE...
  // 
  // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
  // Content-Type: image/gif
  // Content-Transfer-Encoding: binary
  // Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1498@cxf.apache.org>
  // Content-Disposition: attachment;name="-2049913185"
  // 
  // BINARY DATA HERE...
  // 
  // --uuid:e74486f4-52b0-44b6-b829-156810fae20d--

  // Get the number of MIME sub-parts.
  final numParts = mime.numParts;

  // The 1st part at index 0 is the application/xop+xml.  We're just going to extract the JPG and GIF image files..
  final sbFilename = CkStringBuilder();
  var name = '';
  var i = 1;
  final mp = CkMime();
  while (i < numParts) {

    mime.partAt(i, mp);

    // By looking at the MIME above, the "name" attribute of the Content-Disposition header field seems
    // to be the only possible name we can use for each image..
    sbFilename.append('qa_output/');
    name = mp.getHeaderFieldAttribute('Content-Disposition', 'name');
    sbFilename.append(name);
    sbFilename.append('.');
    sbFilename.append(mp.contentType);
    final numReplaced = sbFilename.replace('image/', '');
    mp.saveBody(sbFilename.getAsString());
    print('output file: ${sbFilename.getAsString()}');
    sbFilename.clear();
    i++;
  }

  print('Success.');
}