Icicle\Http\Driver\Reader\Http1Reader::findHost PHP Method

    protected function findHost(array $headers) : string
    {
        foreach ($headers as $name => $values) {
            if (strtolower($name) === 'host') {
                return $values[0];
            }
        }
        throw new MessageException(Response::BAD_REQUEST, 'No host header in message.');
    }