slashcode-general

[Slashcode-general] Has anyone been able to do a SSI replacement/kluge?

[barry <sla...@i1...>]

I am trying to hook up a banner ad system that normally works vi SSI. I 
have it set up and installed just fine w/ .shtml files, but I am not having 
luck getting it to work in templates.

I tried to modify the templates with various combinations of code that 
looks like this (the intent is to make an actually http request to the url 
that will serve the ad - the url works directly from the browser)

[%
USE ua=LWP.UserAgent;
USE req=HTTP.Request;
%]

[% FOREACH extension = [ "_1a", "_1b"] %]
		<td align=left>
			[%
			req.method("GET");
			req.uri("$base_url$extension"); # this resolves to a valid url
			ua.request(req).content;
			%]
			</td>
			[% END %]

I set LOAD_PERL =1 in Template::Config, and added PerlModule LWP::UserAgent 
and PerlModule HTTP::Request to the apache directives. I have done the 
usual restart http routine, and have disabled slashd for now so that 
index.pl doesn't run w/o my wanting it to.

Here is the problem - every third or so time I reload the page, I get this 
error in the slash log file:
----------------------
no such context method/member: clone
[Tue Oct 16 03:13:02 2001] [error] 
/index.pl:Apache::ROOTvslash::index_2epl:/usr/local/slash/site/slash/htdocs/index.pl:46:ID 
53, index;index;default : plugin error - Can't locate object method "error" 
via package "LWP::UserAgent" at 
/usr/lib/perl5/site_perl/5.6.0/Template/Plugins.pm line 108.

[Tue Oct 16 03:13:02 2001] [error] Which was called 
by:Apache::ROOTvslash::index_2epl:/usr/local/slash/site/slash/htdocs/index.pl:276:ID 
53, index;index;default : plugin error - Can't locate object method "error" 
via package "LWP::UserAgent" at 
/usr/lib/perl5/site_perl/5.6.0/Template/Plugins.pm line 108.
---------------

After that, sometimes the page loads ok, sometimes it doesn't.

It looks to me like I could use a destructor call to the 2 objects at the 
end of the template, but I tried that and it doesn't work either.

Is there a way to fix this code, or another way to either do a SSI from 
inside a template, or access a URL somehow - I don't really care right now 
which way I access the ads, just that I do....

Thanks!

Barry

Re: [Slashcode-general] Has anyone been able to do a SSI replacement/kluge?

[Alessio B. <al...@al...>]

barry wrote:

> I am trying to hook up a banner ad system that normally works vi SSI.

The only clean way I know is to print out your SSI commands as usual
(<!--#include--> and the like) and then feed the output to SSIChain a in
a OutputChain that will post-process it. This has to be configured in
Apache - see the documentation for Apache::SSIChain

http://search.cpan.org/doc/JANPAZ/Apache-OutputChain-0.07/SSIChain.pm

> I tried to modify the templates with various combinations of code that
> looks like this (the intent is to make an actually http request to the url
> that will serve the ad - the url works directly from the browser)
> 
> [%
> USE ua=LWP.UserAgent;
> USE req=HTTP.Request;
> %]

IMHO you are trying to make a big mess of it.

-- 
Alessio F. Bragadini		al...@al...
APL Financial Services		http://village.albourne.com
Nicosia, Cyprus		 	phone: +357-2-755750

"It is more complicated than you think"
		-- The Eighth Networking Truth from RFC 1925

Re: [Slashcode-general] Has anyone been able to do a SSI replacement/kluge?

[Barry C. <bc...@i1...>]

At 09:34 AM 10/16/2001 +0300, Alessio Bragadini wrote:
Alessio,

I got most of what you suggested implemented with a minimum of fuss and 
bother, but I am still running into a gotcha....I can't find an answer to 
this in any documentation on the web...what happens when the url the SSI 
points to is virtual, and is handled by a Perl Handler itself?

Now I have the following (relavant) directives in my httpd.conf:

<Directory /usr/local/slash/site/slash/htdocs>
     Options FollowSymLinks ExecCGI Includes Indexes
     AllowOverride None
     Order allow,deny
     Allow from all
     AddHandler perl-script .pl
     PerlHandler Apache::OutputChain Apache::SSIChain Apache::Registry
</Directory>

# begin set up for the DAD ad server
<Location /dad>
  SetHandler perl-script
  PerlHandler DAD::public
</Location>

The ssi line I am trying to create in the slash template is something like 
this:

<!--#include virtual="dad/ad?group=[%"$this_section$extension"%]" -->

SSI seems to work fine from regular .shtml files, and I can access the ad 
server directly via URL so I am confident about most of the set up....

The down side is this: When I load a page, I get

[Tue Oct 16 22:19:18 2001] [error] Can't locate object method 
"content_type" via package "DAD::public" at 
/usr/lib/perl5/site_perl/5.6.0/DAD/public.pm line 57.

in my server error log file.

The code referenced in the error message is:
--------------------------
sub handler {
     my ($r)     = @_;
     my $content;

     $r->content_type('text/html'); #  <----line 57
--------------------------

I tried a number of variations:

1 - <!--#exec cgi="dad/ad?group=[%"$this_section$extension"%]" --> gives 
the same error
2- I dropped the ad server into the perl handler chain in all possible 
positions to no avail

Any more suggestions?

Thanks a ton!

Barry







>barry wrote:
>
> > I am trying to hook up a banner ad system that normally works vi SSI.
>
>The only clean way I know is to print out your SSI commands as usual
>(<!--#include--> and the like) and then feed the output to SSIChain a in
>a OutputChain that will post-process it. This has to be configured in
>Apache - see the documentation for Apache::SSIChain
>
>http://search.cpan.org/doc/JANPAZ/Apache-OutputChain-0.07/SSIChain.pm
>
> > I tried to modify the templates with various combinations of code that
> > looks like this (the intent is to make an actually http request to the url
> > that will serve the ad - the url works directly from the browser)
> >
> > [%
> > USE ua=LWP.UserAgent;
> > USE req=HTTP.Request;
> > %]
>
>IMHO you are trying to make a big mess of it.
>
>--
>Alessio F. Bragadini            al...@al...
>APL Financial Services          http://village.albourne.com
>Nicosia, Cyprus                 phone: +357-2-755750
>
>"It is more complicated than you think"
>                 -- The Eighth Networking Truth from RFC 1925
>
>_______________________________________________
>Slashcode-general mailing list
>Sla...@li...
>https://lists.sourceforge.net/lists/listinfo/slashcode-general