("http://127.0.0.1:" ^ string_of_int port ^ "/help"))
with Unix.Unix_error (Unix.ECONNREFUSED, _, _) ->
raise (Failure "Connection refused"))
("http://127.0.0.1:" ^ string_of_int port ^ "/help"))
with Unix.Unix_error (Unix.ECONNREFUSED, _, _) ->
raise (Failure "Connection refused"))