(define (http-server-connector uri proxy)
  (let ((remote-end (or proxy uri)))
    (case (uri-scheme remote-end)
      ((#f http) (tcp-connect (uri-host remote-end) (uri-port remote-end)))
      ((https) (receive (in out)
                   (ssl-connect* hostname: (uri-host remote-end)
                                 port: (uri-port remote-end)
                                 sni-name: #t
                                 protocol: 'tlsv13
                                 verify?: #t) ; accept invalid certs
                 (values in out)))
      (else (error "Unsupported protocol" (uri-scheme remote-end))))))