cgi-prototype-users

[cgi-prototype-users] Tried to use My/App, unable to make it work

[Kai A. <kai...@gm...>]

Hello,

I copied the My/App test application from the CGI-Prototype
distribution, and added a app.cgi like:
use strict;
use warnings;
use lib qw( /real/path/here );

use My::App;
My::App->activate;

----
Now, directing the browser to the application brings up the welcome
page, and the source of the page seems ok, form, action, fields and
submit-button and all.

But filling out the form and submitting it, only yields the same page.
The only way to get to the thanks-page is to add the parameters into
the url, like http:://localhost/app.cgi?first=3Djohn&last=3Ddoe   -> then
I get the nice thank-you-page.

I use this under a recent Cygwin installation, Perl 5.8.7, and lighthttpd

I obviously miss something fundamental here, but I can't figure it
out, can anyone point me in the right direction?

Kai

Re: [cgi-prototype-users] Tried to use My/App, unable to make it work

[Terrence B. <met...@gm...>]

On 10/11/05, Kai Andresen <kai...@gm...> wrote:
> Hello,

Hi Kai!

> >
> I copied the My/App test application from the CGI-Prototype
> distribution,

There's a fully functioning CGI::Prototype app here:

    http://www.metaperl.org/Guestbook

You can download the tarfile and look through it. I can explain
it to you step-by-step if you have questions.

> and added a app.cgi like: use strict; use warnings; use lib qw(
> /real/path/here );
>
> use My::App;
> My::App->activate;
>
> ----
> Now, directing the browser to the application brings up the welcome
> page, and the source of the page seems ok, form, action, fields and
> submit-button and all.

Cool...

> >
> But filling out the form and submitting it, only yields the same page.

What did the FORM action attribute action have?

> > The only way to get to the thanks-page is to add the parameters into
> the url, like http:://localhost/app.cgi?first=3Djohn&last=3Ddoe   -> then
> I get the nice thank-you-page.

Cool...

> >
> I use this under a recent Cygwin installation, Perl 5.8.7, and lighthttpd
>
> I obviously miss something fundamental here, but I can't figure it
> out, can anyone point me in the right direction?

Yes, I think what you are missing is the concept of dispatch. If you look
at the activate method in package CGI::Prototype (the easiest way to learn
CGIP is to look at the source code), it calls dispatch early on in the
activate method. The default dispatch method looks like this:

 sub dispatch {
  my $self =3D shift;
  return $self;=09=09# do nothing, stay here
 }

And so the same page object returning itself is no surprise. In fact,
unless you subclass the default dispatch method and specializing it
to do certain things with a certain query string parameter (such as
rm for runmode), you should never get a different page.

If you dont want to handle dispatch yourself, you can use Aristotle's
CGI::Prototype::PathInfo, which you can get here:

  http://prdownloads.sourceforge.net/cgi-prototype/PathInfo.pm?download

The dispatch logic is documented in the code.

I've also uploaded it to our Sourceforge CVS project  but there is a
5-hour delay between anonymous and developer access to cvs updates.

Re: [cgi-prototype-users] Tried to use My/App, unable to make it work

[Kai A. <kai...@gm...>]

Hi Terrence, first let me thank you for your time

>
> There's a fully functioning CGI::Prototype app here:
>
>     http://www.metaperl.org/Guestbook

I have already looked at it earlier, and it's nice - I really did not
think I had any problems understanding the logic or the relationship
between the files.


> > and added a app.cgi like:
:
> > But filling out the form and submitting it, only yields the same page.
>
> What did the FORM action attribute action have?

it has action=3D"http://localhost/test/app.cgi" as appropriate, and method=
=3D"post"

Also I forgot to mention that the page source validates (i.e. the form
is closed).



> Yes, I think what you are missing is the concept of dispatch. If you look
> at the activate method in package CGI::Prototype (the easiest way to lear=
n
> CGIP is to look at the source code), it calls dispatch early on in the
> activate method. The default dispatch method looks like this:
>
>  sub dispatch {
>   my $self =3D shift;
>   return $self;         # do nothing, stay here
>  }

No, -well dispatch might be a better place than render_enter for what
I know, but the dispatch actually does happen.  The problem seems to
be that when posted, the params are not seen serverside?

app.cgi only uses My/App.pm which extends CGIPH, which defaults to
call welcome.pm

welcome.pm does dispatch using render_enter where control is
transferred to thanks.pm only if both params first and last is
available, but that only happens when I set those params in the url.=20
I still don't get why...??


Kai

[cgi-prototype-users] Re: Tried to use My/App, unable to make it work

[<me...@st...>]

>>>>> "Kai" == Kai Andresen <kai...@gm...> writes:

Kai> I copied the My/App test application from the CGI-Prototype
Kai> distribution, and added a app.cgi like:
Kai> use strict;
Kai> use warnings;
Kai> use lib qw( /real/path/here );

Kai> use My::App;
Kai> My::App->activate;

There's no dispatcher in the TestApp.  Inheriting the "return $self"
from the base class means that you'll stay forever in the "My::App"
state, meaning you'll get the "intentionally left blank" message
forever.

For a better "tiny" app, see my Linux Magazine articles (google
site:stonehenge.com CGI::Prototype for the location).

-- 
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<me...@st...> <URL:http://www.stonehenge.com/merlyn/>
Perl/Unix/security consulting, Technical writing, Comedy, etc. etc.
See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!

Re: [cgi-prototype-users] Re: Tried to use My/App, unable to make it work

[Terrence B. <met...@gm...>]

On 13 Oct 2005 04:58:39 -0700, Randal L. Schwartz <me...@st...> w=
rote:


>
> For a better "tiny" app, see my Linux Magazine articles (google
> site:stonehenge.com CGI::Prototype for the location).

That location is:

http://www.stonehenge.com/merlyn/LinuxMag/col70.html
and also 7[12].html

Re: [cgi-prototype-users] Re: Tried to use My/App, unable to make it work

[A. P. <pag...@gm...>]

* Randal L. Schwartz <me...@st...> [2005-10-13 14:10]:
> For a better "tiny" app, see my Linux Magazine articles (google
> site:stonehenge.com CGI::Prototype for the location).

Randal: just point people at http://cgi-prototype.sf.net/ – there
are links to those articles in the Resources section.

Terrence: would you please `chmod -R g+w *` the web site? You
have created a directory and a bunch of files that I can’t do
anything with because they only have owner write permission.

Regards,
-- 
Aristotle Pagaltzis // <http://plasmasturm.org/>