im_webapp/src/lib/host-name.js

import { KNOWN_HOSTS, DEFAULT_HOST } from '../config.js';

// Detect server address from the URL
export function detectServerAddress() {
  let host = DEFAULT_HOST;
  if (typeof window.location == 'object') {
    if (window.location.protocol == 'file:') {
      // No real page origin to derive a host/port from at all (e.g. a file:// build opened
      // directly) -- this is the one case KNOWN_HOSTS.local's hardcoded port is actually needed.
      host = KNOWN_HOSTS.local;
    } else if (window.location.hostname) {
      // Was `hostname == 'localhost'` on its own branch returning the hardcoded KNOWN_HOSTS.local
      // ('localhost:6060') unconditionally -- any local/self-hosted deployment or dev proxy not on
      // port 6060 (this project's own dev-proxy runs on 8093) got a wrong host and every "no
      // cached tenant/host info yet" connection attempt (e.g. right after clearing storage) failed
      // outright before a later reconnect could recover with the right address. Same-origin
      // same-port assumption already used for every non-localhost host applies here too.
      host = window.location.hostname + (window.location.port ? ':' + window.location.port : '');
    }
  }
  return host;
}

// Detect if the page is served over HTTPS.
export function isSecureConnection() {
  if (typeof window.location == 'object') {
    return window.location.protocol == 'https:';
  }
  return false;
}

export function isLocalHost() {
  if (typeof window.location == 'object') {
    return window.location.hostname == 'localhost';
  }
  return false;
}