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-rw-r--r--lib/inets/src/http_server/mod_esi.erl44
1 files changed, 43 insertions, 1 deletions
diff --git a/lib/inets/src/http_server/mod_esi.erl b/lib/inets/src/http_server/mod_esi.erl
index 3206d957d9..b49b3a7093 100644
--- a/lib/inets/src/http_server/mod_esi.erl
+++ b/lib/inets/src/http_server/mod_esi.erl
@@ -561,7 +561,7 @@ eval(#mod{method = Method} = ModData, ESIBody, Modules)
end.
generate_webpage(ESIBody) ->
- (catch lib:eval_str(string:concat(ESIBody,". "))).
+ (catch eval_str(string:concat(ESIBody,". "))).
is_authorized(_ESIBody, [all]) ->
true;
@@ -573,3 +573,45 @@ is_authorized(ESIBody, Modules) ->
nomatch ->
false
end.
+
+%% eval_str(InStr) -> {ok, OutStr} | {error, ErrStr'}
+%% InStr must represent a body
+%% Note: If InStr is a binary it has to be a Latin-1 string.
+%% If you have a UTF-8 encoded binary you have to call
+%% unicode:characters_to_list/1 before the call to eval_str().
+
+-define(result(F,D), lists:flatten(io_lib:format(F, D))).
+
+-spec eval_str(string()) ->
+ {'ok', string()} | {'error', string()}.
+
+eval_str(Str) when is_list(Str) ->
+ case erl_scan:tokens([], Str, 0) of
+ {more, _} ->
+ {error, "Incomplete form (missing .<cr>)??"};
+ {done, {ok, Toks, _}, Rest} ->
+ case all_white(Rest) of
+ true ->
+ case erl_parse:parse_exprs(Toks) of
+ {ok, Exprs} ->
+ case catch erl_eval:exprs(Exprs, erl_eval:new_bindings()) of
+ {value, Val, _} ->
+ {ok, Val};
+ Other ->
+ {error, ?result("*** eval: ~p", [Other])}
+ end;
+ {error, {_Line, Mod, Args}} ->
+ Msg = ?result("*** ~ts",[Mod:format_error(Args)]),
+ {error, Msg}
+ end;
+ false ->
+ {error, ?result("Non-white space found after "
+ "end-of-form :~ts", [Rest])}
+ end
+ end.
+
+all_white([$\s|T]) -> all_white(T);
+all_white([$\n|T]) -> all_white(T);
+all_white([$\t|T]) -> all_white(T);
+all_white([]) -> true;
+all_white(_) -> false.