React Native

Set a MIME Body from Transfer-Encoded Text

Demonstrates the Chilkat Mime.SetBodyFromEncoded method, which sets the body from already transfer-encoded text. The first argument is the encoding (base64 or quoted-printable) and the second is the encoded text.

Background: Sometimes you already hold content in its encoded form — a Base64 string from a database or another API — and re-decoding just to have Chilkat re-encode it is wasteful. This method stores the encoded text as-is and records the matching transfer encoding, so the body is correct without a needless round trip. Only the standard reversible encodings, Base64 and quoted-printable, are accepted.

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React Native

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

function chilkatExample() {
  // Demonstrates the Mime.SetBodyFromEncoded method, which sets the body from already transfer-
  // encoded text.  The 1st argument is the encoding ("base64" or "quoted-printable") and the 2nd is
  // the encoded text.

  const mime = new Mime();

  mime.contentType = 'text/plain';

  // The body is provided already Base64-encoded; Chilkat stores it without re-encoding.
  const base64Body = 'SGVsbG8sIHRoaXMgaXMgdGhlIGJvZHku';
  try {
    mime.setBodyFromEncoded('base64', base64Body);
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  // The decoded body is the original text.
  let decoded: string;
  try {
    decoded = mime.getBodyDecoded();
  } catch {
    console.log(mime.lastErrorText);
    return;
  }

  console.log(decoded);
}