On 08 Apr 2008 21:48:15 +0300, Ran Eilam wrote:
>
> Hey Shmuel!
>
> On Mon, Apr 7, 2008 at 11:32 PM, Shmuel Fomberg <[EMAIL PROTECTED]> wrote:
> > I'm thinking on getting all the supplied parameters, decode them, and
> > then set them back.
>
> > foreach my $key ($q->param) {
> > my $new_value = decode("...", $q->param($key));
> > $q->param($key, $new_value);
>
> > (assuming that I don't create a form in the outgoing page using CGI.pm
> > functions)
>
> 1) If there is no form, the parameters could only live in cookies or
> links, which I assume you are not creating either, so these parameters
> will NOT appear in the next HTTP request, which is what I assume you
> mean when you say "then set them back".
>
> 2) From the CGI.pm docs (SETTING THE VALUE(S) OF A NAMED PARAMETER) it
> looks like setting parameters does NOT effect the generation of HTML
> for the web client. So even if you did create a form/cookie/link,
> CGI.pm will NOT set the parameters for you. All it does (did not look
> in source or tests, just docs) is change the parameter values for the
> current processing of the request.
Actually setting new value using "param" or deleting it using "Delete"
does affect CGI methods building form elements, i.e. "textfield",
"popup_menu", "hidden" and all others.
(Whether this helps Shmuel or not is another question. It may help, if
for example, to add in his quoted code one line "print hidden($key);" and
to do it inside start_form/end_form.)
> 3) If you need to pass parameters from page to page you need a form
> (perhaps hidden), a cookie, or do some link massaging. From the docs,
> it looks like CGI.pm has only low level support for this, from
> CREATING A HIDDEN FIELD:
>
> "hidden() produces a text field that can't be seen by the user. It is
> useful for passing state variable information from one invocation of
> the script to the next."
>
> Which implies you have to do it yourself- place the parameters in the
> generated forms/links/cookies. Web programming sux.
Regards,
Mikhael.
--
perl -e 'print+chr(64+hex)for+split//,d9b815c07f9b8d1e'
_______________________________________________
Perl mailing list
[email protected]
http://perl.org.il/mailman/listinfo/perl
