React Native

Download Multiple FTP Files by Wildcard (MGET)

Demonstrates the Chilkat Ftp2.MGetFiles method, which downloads files in the current remote directory matching a pattern into a local directory. The first argument is the remote pattern and the second is the local directory. It returns the number of files downloaded, or -1 on failure.

Note: The local 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: This is FTP's mget: fetch everything matching a wildcard in one call rather than looping yourself. It operates on the current remote directory — hence the ChangeRemoteDir first — and does not descend into subdirectories; use DownloadTree for recursive transfers. The count return lets you confirm how many matched, with -1 signaling an outright failure to check separately from a legitimate zero.

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React Native

import { Ftp2 } from '@chilkat/react-native'

async function chilkatExample() {
  // Demonstrates the Ftp2.MGetFiles method, which downloads files in the current remote directory
  // matching a pattern into a local directory.  The 1st argument is the remote pattern and the 2nd
  // is the local directory.  It returns the number of files downloaded, or -1 on failure.

  const ftp = new Ftp2();

  ftp.hostname = 'ftp.example.com';
  ftp.username = 'myFtpLogin';

  // Normally you would not hard-code the password in source.  You should instead obtain it
  // from an interactive prompt, environment variable, or a secrets vault.
  ftp.password = 'myPassword';

  try {
    await ftp.connectAsync();
  } catch {
    console.log(ftp.lastErrorText);
    return;
  }

  try {
    await ftp.changeRemoteDirAsync('public_html');
  } catch {
    console.log(ftp.lastErrorText);
    return;
  }

  // Download all .html files from the current remote directory.  Subdirectories are not traversed.
  const numDownloaded = await ftp.mGetFilesAsync('*.html', 'qa_output/site');
  if (numDownloaded < 0) {
    console.log(ftp.lastErrorText);
    return;
  }

  console.log(`Downloaded ${numDownloaded} files.`);

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