@algolia/dns-filter

dns-filter

A small utility library to test whether requests try to access predefined IPs

WARNING This project is not an officially maintained Algolia project. This repository should not be used for any production project. Bug reports and feature requests will most likely be ignored.

Usage

const { validateURL, NetworkError, PRIVATE_IP_PREFIXES } = require('@algolia/dns-filter');

const restricted = process.env.NODE_ENV === 'development'
  ? [] // allow everything in dev
  : PRIVATE_IP_PREFIXES; // no private IPs otherwise

const url = 'http://localhost/admin';
try {
  await validateURL({
    url,
    ipPrefixes: restricted,
    context: { some: 'metadata' },
  });
}
catch (err) {
  log.error(err); // log error
  throw new NetworkError(); // throw generic error
}