-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
- (* next function is for looping in case the server is not responding *)
- let rec contact_server () =
- let socketclient = U.socket U.PF_INET U.SOCK_DGRAM 0
- and socketserver = U.socket U.PF_INET U.SOCK_DGRAM 0 in
- let bounded = ref false in
- while not !bounded do
- try
- U.bind socketclient (U.ADDR_INET(U.inet_addr_any,portclient)) ;
- bounded := true
- with _ ->
- print_endline "Port unavailable. Retrying..." ; flush stdout ;
- U.sleep 5 (* wait hoping the inetaddr is released *)
- done ;
- 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 ;
- U.close socketserver ;
- let process_signal _ = U.close socketclient 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 socketclient "" 0 0 [] = -1 then
- raise XsltProcessorCouldNotReceive ;
- ignore (U.alarm 0) ; (* stop the bomb *)
- Sys.set_signal Sys.sigalrm Sys.Signal_default ;
- U.close socketclient ;
- tmpfile
- with
- U.Unix_error(_,"recv",_) ->
- print_endline "Xaland server not responding. Retrying..." ;
- flush stdout;
- contact_server ()
- in
- contact_server ()