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Implementation for contains_javascript

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John Whitington
2025-06-03 12:55:52 +01:00
parent 1e07967755
commit ad25ad22c9
1 changed files with 24 additions and 2 deletions
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26
cpdfcommand.ml
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@ -3831,14 +3831,36 @@ let write_images device res quality boxname annots antialias downsample spec pdf
let remove_javascript pdf =
(* Find /S /JavaScript and empty the /JS string. Also, Empty out any /URI (javascript). *)
Pdf.objselfmap (fun o -> o) pdf
Pdf.objselfmap (fun o -> o) pdf;
(* Process the /Root -> /Names -> /JavaScript *)
(*Pdf.remove_chain pdf ["/Root"; "/Names"; "/JavaScript"];*)
ignore (Pdf.remove_chain pdf ["/Root"; "/Names"; "/JavaScript"])
let contains_javascript pdf =
let found = ref false in
(* Any dictionary with /S /JavaScript or any /URI (javascript:...) *)
let rec contains_javascript_single_object f pdf = function
| (Pdf.Dictionary d) -> f (Pdf.recurse_dict (contains_javascript_single_object f pdf) d)
| (Pdf.Stream {contents = (Pdf.Dictionary dict, data)}) ->
f (Pdf.Stream {contents = (Pdf.recurse_dict (contains_javascript_single_object f pdf) dict, data)})
| Pdf.Array a -> Pdf.recurse_array (contains_javascript_single_object f pdf) a
| x -> x
in
let f d =
begin match Pdf.lookup_direct pdf "/S" d with
| Some (Pdf.String "/JavaScript") -> set found
| _ -> ()
end;
begin match Pdf.lookup_direct pdf "/URI" d with
| Some (Pdf.String s) when String.length s >= 11 && String.sub s 0 11 = "javascript:" -> set found; d
| _ -> d
end
in
Pdf.objiter (fun _ obj -> ignore (contains_javascript_single_object f pdf obj)) pdf;
(* Any /Root -> /Names -> /JavaScript *)
begin match Pdf.lookup_chain pdf pdf.Pdf.trailerdict ["/Root"; "/Names"; "/JavaScript"] with
| Some _ -> set found
| None -> ()
end;
print_string (Printf.sprintf "%b" !found)
(* Main function *)