This commit was manufactured by cvs2svn to create tag 'v0_0_2'.

[helm.git] / helm / interface / xsltProcessor.ml

diff --git a/helm/interface/xsltProcessor.ml b/helm/interface/xsltProcessor.ml
index 95f1c70d59b5edc7a6a26f892d04e1eb43b52f6e..3d3690f395154b8c76bd680e7700c736db3a3039 100644 (file)
--- a/helm/interface/xsltProcessor.ml
+++ b/helm/interface/xsltProcessor.ml
@@ -23,57 +23,61 @@
  * http://cs.unibo.it/helm/.
  *)
 
-let initialize () =
- Printf.printf "Initializing the UWOBO servlet, please wait" ; flush stdout ;
- Hashtbl.iter
-  (fun key uri ->
-    let string_to_send = (Configuration.processor_url ^ "add?xsluri=" ^ Configuration.getter_url ^ "getxslt?uri=" ^ uri ^ "&key=" ^ key)
-    in
-     print_char '.' ; flush stdout ;
-     ClientHTTP.send string_to_send
-  )
-  StyleConfiguration.styles ;
- Printf.printf " ok\n" ; flush stdout
-;;
-
-(* CSC: esempio per vedere se veniva calcolata bene. Rimuovere pure il commento
-http://phd.cs.unibo.it:8080/helm/servlet/uwobo/apply?xmluri=http%3A//phd.cs.unibo.it%3A8081/getxml%3Furi%3Dcic%3A/Coq/Init/Datatypes/nat_ind.con&keys=C1,C2,L&param.processorURL=http%3A//phd.cs.unibo.it%3A8080/helm/servlet/uwobo/&param.getterURL=http%3A//phd.cs.unibo.it%3A8081/&prop.doctype-public=&prop.encoding=&prop.media-type=text/xml&param.doctype-public=&param.encoding=&param.media-type=text/xml&param.keys=C1%2CC2%2CL&param.CICURI=cic:/Coq/Init/Datatypes/nat_ind.con&param.naturalLanguage=yes&param.annotations=NO
-
+exception XsltProcessorCouldNotSend;;
+exception XsltProcessorCouldNotReceive;;
 
-&keys=C1,C2,L
-*)
-
-let process uri usecache mode naturalLanguage annotations =
- let uri = UriManager.string_of_uri uri in
- let url = Configuration.getter_url ^ "getxml?uri=" ^ uri in
- let keys =
-  match StyleConfiguration.key_list_of_mode_name mode with
-    first_key::key_list ->
-     first_key ^
-     (List.fold_right
-      (fun key cmd -> "," ^ key ^ cmd)
-       key_list
-       ""
-      ) 
-  | _ -> prerr_string "Warning: the list of keys for UWOBO is empty\n"; ""
- in
- let string_to_send =
-  Configuration.processor_url ^ "apply?xmluri=" ^ url ^
-  "&param.processorURL=" ^ Configuration.processor_url ^
-  "&param.getterURL=" ^ Configuration.getter_url ^
-  "&prop.doctype-public=&prop.encoding=&prop.media-type=text/xml" ^
-  "&keys=" ^ keys ^
-  "&param.keys=" ^ keys ^
-  "&param.CICURI=" ^ uri ^
-  "&param.naturalLanguage=" ^ naturalLanguage ^
-  "&param.annotations=" ^ annotations ^
-  "&param.doctype-public=&param.encoding=&param.media-type=text/xml"
- in
-  string_to_send
-;;
+let portserver = 12345;;
+let portclient = 12346;;
+let time_to_wait = 10;;
 
-(*CSC: ma questa funzione ha senso? Se si', in quale modulo?*)
-(*CSC: tutti i parametri passati alla process sono quasi a caso!!! *)
-let url_of_uri uri =
- process uri true "cic" "yes" "YES"
+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 = "/tmp/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 ()
 ;;