React Native

Load MIME from a StringBuilder

Demonstrates the Chilkat Mime.LoadMimeSb method, which parses complete MIME text from a StringBuilder and replaces the current MIME. The only argument is the StringBuilder.

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: When the MIME text already lives in a StringBuilder — assembled in memory, or read and lightly edited — this loads it directly without an intermediate string copy. Its parsing behavior matches LoadMime; the difference is purely the source. For content that might include arbitrary binary bytes, use the BinData loader instead.

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React Native

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

function chilkatExample() {
  // Demonstrates the Mime.LoadMimeSb method, which parses complete MIME text from a StringBuilder
  // and replaces the current MIME.  The only argument is the StringBuilder.

  // Put the MIME text into a StringBuilder (here loaded from a file, but it could come from
  // anywhere).
  const sb = new StringBuilder();
  try {
    sb.loadFile('qa_data/message.eml', 'utf-8');
  } catch {
    console.log(sb.lastErrorText);
    return;
  }

  const mime = new Mime();
  try {
    mime.loadMimeSb(sb);
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  console.log(`Content-Type: ${mime.contentType}`);
}