Function shouldBypassProxy

lib/helpers/shouldBypassProxy.js:159–210

(location)

};

export default function shouldBypassProxy(location) {
  let parsed;

  try {
    parsed = new URL(location);
  } catch (_err) {
    return false;
  }

  const noProxy = (process.env.no_proxy || process.env.NO_PROXY || '').toLowerCase();

  if (!noProxy) {
    return false;
  }

  if (noProxy === '*') {
    return true;
  }

  const port =
    Number.parseInt(parsed.port, 10) || DEFAULT_PORTS[parsed.protocol.split(':', 1)[0]] || 0;

  const hostname = normalizeNoProxyHost(parsed.hostname.toLowerCase());

  return noProxy.split(/[\s,]+/).some((entry) => {
    if (!entry) {
      return false;
    }

    let [entryHost, entryPort] = parseNoProxyEntry(entry);

    entryHost = normalizeNoProxyHost(entryHost);

    if (!entryHost) {
      return false;
    }

    if (entryPort && entryPort !== port) {
      return false;
    }

    if (entryHost.charAt(0) === '*') {
      entryHost = entryHost.slice(1);
    }

    if (entryHost.charAt(0) === '.') {
      return hostname.endsWith(entryHost);
    }

    return hostname === entryHost || (isLoopback(hostname) && isLoopback(entryHost));
  });
}