+++ /dev/null
-
-(*
- OCaml HTTP - do it yourself (fully OCaml) HTTP daemon
-
- Copyright (C) <2002-2004> Stefano Zacchiroli <zack@cs.unibo.it>
-
- This program 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 2 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*)
-
-open Http_types
-
-let m = Mutex.create ()
-let m_locked = ref true
-
-let critical f =
- Mutex.lock m;
- m_locked := true;
- Lazy.force f;
- m_locked := false;
- Mutex.unlock m
-
- (** ocaml's Thread.unlock suspend the invoking process if the mutex is already
- * unlocked, therefore we unlock it only if we know that it's currently locked
- *)
-let safe_unlock _ _ = if !m_locked then Mutex.unlock m
-
-let i = ref 10
-let dump_i outchan =
- Http_daemon.respond ~body:(Printf.sprintf "i = %d\n" !i) outchan
-
-let callback req outchan =
- match req#path with
- | "/incr" -> critical (lazy (incr i; dump_i outchan; Unix.sleep 5))
- | "/decr" -> critical (lazy (decr i; dump_i outchan; Unix.sleep 5))
- | "/get" -> critical (lazy (dump_i outchan))
- | bad_request -> Http_daemon.respond_error outchan
-
-let spec =
- { Http_daemon.default_spec with
- port = 9999;
- mode = `Thread;
- callback = callback;
- exn_handler = Some safe_unlock;
- (** ocaml-http's default exn_handler is Pervasives.ignore. This means
- * that threads holding the "m" mutex above may die without unlocking it.
- * Using safe_unlock as an exception handler we ensure that "m" mutex is
- * unlocked in case of exceptions (e.g. SIGPIPE) *)
- }
-
-let _ = Http_daemon.main spec
-