-(* Copyright (C) 2000, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM 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.
- *
- * HELM 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 HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-exception XsltProcessorCouldNotSend;;
-exception XsltProcessorCouldNotReceive;;
-
-let initialize () =
- Hashtbl.iter
- (fun key uri ->
- ignore (Sys.command ("uwobo-client add " ^ uri ^ " " ^ key))
- )
- StyleConfiguration.styles
-;;
-
-let _ = initialize () ;;
-
-let portserver = 12345;;
-let portclient = 12346;;
-let time_to_wait = 10;;
-
-let rec process uri usecache mode =
- let module U = Unix in
- let uri = UriManager.string_of_uri uri in
- let pid = string_of_int (U.getpid ())
- and filename' =
- let uri' = Str.replace_first (Str.regexp ".*:") "" uri in
- Str.global_replace (Str.regexp "/") "_"
- (Str.global_replace (Str.regexp "_") "__" uri')
- in let tmpfile = Configuration.tmp_dir ^ "/helm_" ^ filename' ^ "_" ^ pid in
- (* test if the cache can be used *)
- let tmp_file_exists = Sys.file_exists tmpfile in
- if usecache && tmp_file_exists then
- tmpfile
- else
- let url = Configuration.getter_url ^ uri in
- (* purge the cache if asked to *)
- if not usecache && tmp_file_exists then
- Sys.remove tmpfile ;
- (* let string_to_send = mode ^ " " ^ url ^ " " ^ tmpfile in *)
- let string_to_send = "apply " ^ url ^ " " ^ tmpfile ^
- match mode with
- "cic" -> " C1 C2"
- | "theory" -> " T1 T2"
- in
- (* next function is for looping in case the server is not responding *)
- let socketserver = U.socket U.PF_INET U.SOCK_DGRAM 0 in
- let rec contact_server () =
- let n =
- U.sendto socketserver string_to_send 0 (String.length string_to_send)
- [] (U.ADDR_INET(U.inet_addr_any,portserver))
- in
- if n = -1 then raise XsltProcessorCouldNotSend ;
- let process_signal _ = () in
- Sys.set_signal Sys.sigalrm (Sys.Signal_handle process_signal) ;
- (* if the server does not respond, repeat the query *)
- ignore (U.alarm time_to_wait) ;
- try
- if U.recv socketserver "" 0 0 [] = -1 then
- raise XsltProcessorCouldNotReceive ;
- ignore (U.alarm 0) ; (* stop the bomb *)
- Sys.set_signal Sys.sigalrm Sys.Signal_default ;
- U.close socketserver ;
- tmpfile
- with
- U.Unix_error(_,"recv",_) ->
- print_endline "Xaland server not responding. Retrying..." ;
- flush stdout;
- contact_server ()
- in
- contact_server ()
-;;