hop-2012/server/streamutil.ml

32 lines
1.1 KiB
OCaml

(* Copyright 2012 Tony Garnock-Jones <tonygarnockjones@gmail.com>. *)
(* This file is part of Hop. *)
(* Hop is free software: you can redistribute it and/or modify it *)
(* under the terms of the GNU General Public License as published by the *)
(* Free Software Foundation, either version 3 of the License, or (at your *)
(* option) any later version. *)
(* Hop is distributed in the hope that it will be useful, but *)
(* WITHOUT ANY WARRANTY; without even the implied warranty of *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *)
(* General Public License for more details. *)
(* You should have received a copy of the GNU General Public License *)
(* along with Hop. If not, see <http://www.gnu.org/licenses/>. *)
open Lwt
let stream_to_bytes s =
lwt pieces = Lwt_stream.to_list s in
return (Bytes.concat Bytes.empty pieces)
let stream_generator f =
let mbox = Lwt_mvar.create_empty () in
let yield v = Lwt_mvar.put mbox (Some v) in
ignore (lwt () = f yield in
Lwt_mvar.put mbox None);
Lwt_stream.from (fun () -> Lwt_mvar.take mbox)
let stream_encode s = Lwt_stream.map Bytes.of_string s