readClient static method
The client ip and scheme of req. trusted is the
trustedProxies setting. It is parsed once per isolate.
The answer is kept for req, so a second call is cheap.
Implementation
static ({String? ip, String scheme}) readClient(
HttpRequest req,
List<String> trusted,
) {
if (!identical(trusted, _cachedList)) {
_cached = TrustedProxy(trusted);
_cachedList = trusted;
_perRequest[req] = null;
}
return _perRequest[req] ??= _read(req);
}