+(* 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 ()
+;;