module type GEMINI_TRANSACTION =
sig
  type request

  module M : MimeType.MIME_TYPE

  type status =
    | INPUT
    | SUCCESS
    | SUCCESS_EOCSS
    | REDIR_TEMP
    | REDIR_PERM
    | TEMP_FAIL
    | SERVER_UNAVAILABLE
    | CGI_ERROR
    | PROXY_ERROR
    | SLOW_DOWN
    | PERM_FAIL
    | NOT_FOUND
    | GONE
    | PROXY_REQ_REFUSED
    | BAD_REQ
    | CLIENT_CERT_REQUIRED
    | TRANSIENT_CERT_REQUESTED
    | AUTHORISED_CERT_REQUIRED
    | CERT_NOT_ACCEPTED
    | FUTURE_CERT_REJECTED
    | EXPIRED_CERT_REJECTED

  type mime_type = M.t

  type response = status * mime_type * string

  val make_request : url:string -> request

  val int_to_status : int -> status option

  val transaction : request -> response option Lwt.t
end

module GeminiTransaction (M : MimeType.MIME_TYPE) : GEMINI_TRANSACTION with module M = M