1 (* Copyright (C) 2004-2011, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
26 type session_id = Uuidm.t
28 (* user table: user id, (password, optional session id) *)
29 type user = string * (string * session_id option)
31 let user_tbl = (ref [] : user list ref)
33 (* session table: (user id, session id), matita status *)
34 type session = (string * session_id) * MatitaEngine.status
36 let session_tbl = (ref [] : session list ref)
38 exception UsernameCollision of string
40 let lookup_user uid = List.assoc uid !user_tbl
42 let create_session uid status =
43 let pw,sid = List.assoc uid !user_tbl in
44 let clean_utbl = List.remove_assoc uid !user_tbl in
45 let new_session = Uuidm.create `V4 in
46 user_tbl := (uid,(pw,Some new_session))::clean_utbl;
47 let clean_stbl = match sid with
49 List.remove_assoc (uid,sid') !session_tbl
51 in session_tbl := ((uid,new_session),status)::clean_stbl
55 match List.assoc uid !user_tbl with
58 user_tbl := (uid,(pw,None))::List.remove_assoc uid !user_tbl;
59 session_tbl := List.remove_assoc (uid,sid) !session_tbl
63 user_tbl := List.remove_assoc uid !user_tbl
66 (* serialization and deserialization of the user table *)
68 let path = Helm_registry.get "matita.basedir" in
69 let dirname = Filename.dirname path in
70 HExtlib.mkdir dirname;
75 let clean_utbl = List.map (fun (uid,(pw,_)) -> uid,(pw,None)) !user_tbl in
76 let utbl_ch = open_out (config_path () ^ "/usertable.dump") in
77 Marshal.to_channel utbl_ch clean_utbl [];
82 let utbl_ch = open_in (config_path () ^ "/usertable.dump") in
83 user_tbl := Marshal.from_channel utbl_ch;
85 (* old_sessions are now invalid *)
91 let _ = lookup_user uid in
92 raise (UsernameCollision uid)
94 user_tbl := (uid,(pw,None))::!user_tbl;