React Native

Get an Email's MIME into a BinData

Demonstrates the Chilkat Email.GetMimeBd method, which serializes the complete RFC822/MIME message (headers, body representations, related items, and attachments) and appends the bytes to a BinData object. This example builds a message, serializes it to a BinData, and prints the byte count.

Background: A BinData holds raw bytes, which is the right container when you want the MIME as binary rather than text — for example to write it directly to a file or socket, hash it, or hand it to another API that expects a byte buffer. It is the binary counterpart to GetMime (string) and GetMimeSb (StringBuilder).

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React Native

import { BinData, Email } from '@chilkat/react-native'

function chilkatExample() {
  // Demonstrates the GetMimeBd method, which serializes the complete RFC822/MIME message
  // (headers, bodies, related items, and attachments) and appends the bytes to a BinData
  // object.

  const email = new Email();
  email.subject = 'GetMimeBd example';
  email.from = 'alice@example.com';
  email.addTo('Bob', 'bob@example.com');
  email.body = 'Hello!';

  // Append the complete MIME to a BinData object.
  const bdMime = new BinData();
  try {
    email.getMimeBd(bdMime);
  } catch {
    console.log(email.lastErrorText);
    return;
  }

  console.log(`MIME size (bytes) = ${bdMime.numBytes}`);
}