Function hostForRedirectUri

src/node/utils/oauthLoopbackServer.ts:95–104

* Format a `server.listen()` host value for use inside a URL. * * - IPv6 literals must be wrapped in brackets (e.g. "::1" -> "[::1]") * - Zone identifiers must be percent-encoded ("%" -> "%25")

(rawHost: string)

 * - Zone identifiers must be percent-encoded ("%" -> "%25")
 */
function hostForRedirectUri(rawHost: string): string {
  const host = rawHost.startsWith("[") && rawHost.endsWith("]") ? rawHost.slice(1, -1) : rawHost;

  if (host.includes(":")) {
    // RFC 6874: zone identifiers use "%25" in URIs.
    return `[${host.replaceAll("%", "%25")}]`;
  }

  return host;
}

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// Main