React Native

Get a Summary of the MIME Structure

Demonstrates the Chilkat Mime.GetStructure method, which returns a concise summary of the MIME tree. The only argument selects the format: xml for XML, or text (the default for any other value) for a plain-text outline.

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: A real message can nest multipart containers several levels deep — a multipart/mixed holding a multipart/alternative of text and HTML plus attachments — and GetStructure renders that hierarchy at a glance without the full content. It is the fast way to understand or debug an unfamiliar message's layout, in either a readable text outline or machine-parseable XML.

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React Native

import { Mime } from '@chilkat/react-native'

function chilkatExample() {
  // Demonstrates the Mime.GetStructure method, which returns a concise summary of the MIME tree.
  // The only argument selects the output format: "xml" for XML, or "text" (the default) for a
  // plain-text outline.

  const mime = new Mime();

  try {
    mime.loadMimeFile('qa_data/multipart_message.eml');
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  // Get a human-readable text outline of the MIME structure.
  let structure: string;
  try {
    structure = mime.getStructure('text');
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  console.log(structure);
}