Re: [htmltmpl] inconsistent file_cache behavior

[Mathew R. <mat...@re...>]

try 'perldoc HTML::Template' then search for filter... the first thing =
it says is:

filter - this option allows you to specify a filter for your
               template files.  A filter is a subroutine that will be =
called
               after HTML::Template reads your template file but before =
it
               starts parsing template tags.


thus, filtering is only applied on file load (ie when the tamplate is =
parsed for tags).  Since caching wont allow the file to reload unless it =
changes, the filer is not re-applied.

To solve this, you can either:
a) disable caching if you want to keep the filter
b) re-implement the template so that you dont need to use a filter, by =
using TMPL_IF and TMPL_INCLUDE

Hope this helps,
Mathew


----- Original Message -----=20
From: "Nishikant Kapoor" <nk...@we...>
To: "T Mailing List" <htm...@li...>
Sent: Monday, May 17, 2004 3:56 PM
Subject: Re: [htmltmpl] inconsistent file_cache behavior


> Sam Tregar wrote:
> > On Sun, 16 May 2004, Nishikant Kapoor wrote:
> >=20
> >>I do edit the template by hand but in this case, the mtime on the
> >>template is not changing. However, the content for the template =
needs to
> >>change based on whether the user is logged-in or logged-out.
> >=20
> >=20
> > Well that has nothing to do with the file cache.  To convince
> > yourself, turn it off and observe that nothing changes!  The file
> > cache is just saving HTML::Template the trouble of loading the
> > template from disk every time it needs it.  It has nothing to do =
with
> > the output - that's driven by your calls to param(), which are reset
> > after every new().
>=20
> Okay, here is what I think is happening.
>=20
> index.shtml:
> ...
>    <!--#exec cgi=3D"/cgi-bin/featuredLinks.cgi"-->
> ...
>=20
> When you login or logout, sub showHome() is called.
>=20
> sub showHome {
> ...
>    my $filter =3D sub {
>      my $textRef =3D shift;
>=20
>      my $strToReplace =3D 'featuredLinks.cgi';
>      if ($$textRef =3D~ /(.*cgi=3D\")(.*$strToReplace)(\".*)/) {
>        my $strToReplaceWith =3D &getFeaturedLinks;
>        $$textRef =3D~ =
s/(.*cgi=3D\")(.*$strToReplace)(\".*)/$strToReplaceWith/g;
>      }
>    };
>=20
>    my $template =3D HTML::Template->new(filename =3D> 'index.shtml',
>                                       file_cache =3D> 1,
>                                       file_cache_dir =3D> 'tmplCache',
>                                       file_cache_dir_mode =3D> 0777,
>                                       filter =3D> $filter);
> ...
> } #end of showHome()
>=20
> When file_cache is ON, template is being returned from the cache,=20
> thereby bypassing the $filter which is actually responsible for =
getting=20
> the appropriate data based on user's login status and hence, the=20
> inconsistency. Does this look like what is going on here? If so, what=20
> would you suggest be the workaround?
>=20
> Thanks,
> Nishi
>=20
>=20
>=20
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