React Native

Fetch an IMAP Message as MIME Text

Demonstrates the Chilkat Imap.FetchSingleAsMime method, which downloads one message and returns its MIME source as a string. If the second argument (bUid) is true, the first argument is a UID; otherwise it is a sequence number. This example fetches message 1's raw MIME.

Background: Sometimes you want the message exactly as it exists on the server — the raw MIME — rather than a parsed Email object. That is what you save to a .eml file, feed to another parser, or archive verbatim. This method returns the MIME as text; for messages that may contain binary data, the BinData variant FetchSingleBd preserves the exact bytes.

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React Native

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

async function chilkatExample() {
  // Demonstrates the Imap.FetchSingleAsMime method, which downloads one message and returns
  // its MIME source as a string.  If the 2nd argument (bUid) is true, the 1st argument is a
  // UID; otherwise it is a sequence number.

  const imap = new Imap();

  imap.ssl = true;
  imap.port = 993;

  try {
    await imap.connectAsync('imap.example.com');
  } catch {
    console.log(imap.lastErrorText);
    return;
  }

  try {
    await imap.loginAsync('user@example.com', 'myPassword');
  } catch {
    console.log(imap.lastErrorText);
    return;
  }

  try {
    await imap.selectMailboxAsync('Inbox');
  } catch {
    console.log(imap.lastErrorText);
    return;
  }

  // Download message sequence number 1 and return its raw MIME.  bUid = false.
  let mime: string;
  try {
    mime = await imap.fetchSingleAsMimeAsync(1, false);
  } catch {
    console.log(imap.lastErrorText);
    return;
  }

  console.log(mime);

  try {
    await imap.disconnectAsync();
  } catch {
    console.log(imap.lastErrorText);
    return;
  }
}