Function parseProxyUrl

lib/internal/http.js:195–210

(env, protocol)

}

function parseProxyUrl(env, protocol) {
  // Get the proxy url - following the most popular convention, lower case takes precedence.
  // See https://about.gitlab.com/blog/we-need-to-talk-no-proxy/#http_proxy-and-https_proxy
  const proxyUrl = (protocol === 'https:') ?
    (env.https_proxy || env.HTTPS_PROXY) : (env.http_proxy || env.HTTP_PROXY);
  // No proxy settings from the environment, ignore.
  if (!proxyUrl) {
    return null;
  }

  if (proxyUrl.includes('\r') || proxyUrl.includes('\n')) {
    throw new ERR_PROXY_INVALID_CONFIG(`Invalid proxy URL: ${proxyUrl}`);
  }

  return proxyUrl;
}

function parseProxyConfigFromEnv(env, protocol, keepAlive) {
  // We only support proxying for HTTP and HTTPS requests.