Function makeNoProxyMatcher

packages/agent-core/src/utils/proxy.ts:154–170

(noProxy: string)

 * the SOCKS path, where bypass is not handled by undici for us.
 */
export function makeNoProxyMatcher(noProxy: string): (host: string, port?: number | string) => boolean {
  const entries = noProxy
    .split(',')
    .map((entry) => entry.trim().toLowerCase())
    .filter((entry) => entry.length > 0);
  if (entries.includes('*')) return () => true;
  const parsed = entries.map(parseNoProxyEntry);
  return (host: string, port?: number | string) => {
    const target = host.toLowerCase().replaceAll(/^\[|\]$/g, '');
    const targetPort = port === undefined ? undefined : String(port);
    return parsed.some(
      ({ host: entry, port: entryPort }) =>
        (entryPort === undefined || entryPort === targetPort) &&
        (target === entry || target.endsWith(`.${entry}`)),
    );
  };
}

/**
 * Split a `NO_PROXY` entry into host (leading `.` stripped) and optional port.