X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fgetter%2Fhttp_getter_wget.ml;fp=helm%2Focaml%2Fgetter%2Fhttp_getter_wget.ml;h=3171e664feac4bd373dc8b1e415b3b6373216329;hb=a3fb06e72407e3590fa60a74ac5fec01e6bfe1f9;hp=99a9f01e72947bb8baa431d997f2270b4ec9f9c4;hpb=a83e0e4b2cf4d0cd378b5f2f451aa857507e0a01;p=helm.git

diff --git a/helm/ocaml/getter/http_getter_wget.ml b/helm/ocaml/getter/http_getter_wget.ml
index 99a9f01e7..3171e664f 100644
--- a/helm/ocaml/getter/http_getter_wget.ml
+++ b/helm/ocaml/getter/http_getter_wget.ml
@@ -30,28 +30,34 @@ let send cmd =
     ignore (Http_user_agent.get cmd)
   with e -> raise (Http_client_error (cmd, Printexc.to_string e))
 
-let get uri =
+let get url =
   try
-    Http_user_agent.get uri
-  with e -> raise (Http_client_error (Printexc.to_string e, uri))
+    Http_user_agent.get url
+  with e -> raise (Http_client_error (Printexc.to_string e, url))
 
-let get_and_save uri dest_filename =
+let get_and_save url dest_filename =
   let out_channel = open_out dest_filename in
-  Http_user_agent.get_iter (output_string out_channel) uri;
+  Http_user_agent.get_iter (output_string out_channel) url;
   close_out out_channel
 
-let get_and_save_to_tmp uri =
+let get_and_save_to_tmp url =
   let flat_string s s' c =
     let cs = String.copy s in
     for i = 0 to (String.length s) - 1 do
       if String.contains s' s.[i] then cs.[i] <- c
-    done ;
+    done;
     cs
   in
   let user = try Unix.getlogin () with _ -> "" in
   let tmp_file =
-    Filename.temp_file (user ^ flat_string uri ".-=:;!?/&" '_') ""
+    Filename.temp_file (user ^ flat_string url ".-=:;!?/&" '_') ""
   in
-  get_and_save uri tmp_file ;
+  get_and_save url tmp_file;
   tmp_file
 
+let exists url =
+  try
+    ignore (Http_user_agent.head url);
+    true
+  with Http_user_agent.Http_error _ -> false
+