On Wed, 2013-12-04 at 17:07 +0100, Jakub Narębski wrote:
> On Wed, Dec 4, 2013 at 2:43 PM, Krzesimir Nowak <[email protected]>
> wrote:
>
> > Users of validate_* passing "0" might get failures on correct name
> > because of coercion of "0" to false in code like:
> > die_error(500, "invalid ref") unless (check_ref_format ("0"));
>
> I would say that the problem was that validate_sth() subroutines returned
> value of parameter if it was valid, which could be a problem if said value is
> false-ish (e.g. validate_refname("0"), or validate_pathname("0")).
That's what I meant.
>
> Returning undef on invalid data newer was a problem, using 'return $input;'
> on valid input was, especially that validate_sth() functions were ever used
> in a conditional:
>
> if (!validate_sth($param)) {
> die_error(...)
> }
>
> While at it validate_sth() is not a best name for boolean predicate:
> is_valid_sth() would be better, I think.
Ok, I'll rename those.
>
> > Signed-off-by: Krzesimir Nowak <[email protected]>
> > ---
> > gitweb/gitweb.perl | 45 +++++++++++++++++++++++++--------------------
> > 1 file changed, 25 insertions(+), 20 deletions(-)
> >
> > diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
> > index 67415b9..3434602 100755
> > --- a/gitweb/gitweb.perl
> > +++ b/gitweb/gitweb.perl
> > @@ -1419,63 +1419,68 @@ sub href {
> > ## validation, quoting/unquoting and escaping
> >
> > sub validate_action {
> > - my $input = shift || return undef;
> > - return undef unless exists $actions{$input};
> > - return $input;
> > + my $input = shift;
> > +
> > + return 0 unless defined $input;
> > + return 0 unless exists $actions{$input};
> > + return 1;
> > }
>
> The only change that needs to be doe is replacing
>
> return $input;
>
> with
>
> return 1;
>
I prefer to use zeros instead of undefs - one might wonder if that undef
is somewhat special that we can't use 0.
--
Krzesimir Nowak
Software Developer
Endocode AG
[email protected]
------
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