X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fgetter%2Fhttp_getter_wget.ml;h=a6118c82c1cebf295b0e53f4405bbea55f7c4109;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=99a9f01e72947bb8baa431d997f2270b4ec9f9c4;hpb=617285cac8aabbe62699d5d7144b0df4f5771000;p=helm.git

diff --git a/helm/ocaml/getter/http_getter_wget.ml b/helm/ocaml/getter/http_getter_wget.ml
index 99a9f01e7..a6118c82c 100644
--- a/helm/ocaml/getter/http_getter_wget.ml
+++ b/helm/ocaml/getter/http_getter_wget.ml
@@ -28,30 +28,41 @@ open Http_getter_types
 let send cmd =
   try
     ignore (Http_user_agent.get cmd)
-  with e -> raise (Http_client_error (cmd, Printexc.to_string e))
+  with exn -> raise (Http_client_error (cmd, Printexc.to_string exn))
 
-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 exn -> raise (Http_client_error (Printexc.to_string exn, 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;
+  (try
+    Http_user_agent.get_iter (output_string out_channel) url;
+  with exn ->
+    close_out out_channel;
+    Sys.remove dest_filename;
+    raise (Http_client_error (Printexc.to_string exn, 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
+