October 2011 - dancer-users - lists.preshweb.co.uk

Custom FILTERS for TemplateToolkit in dancer?
by Assaf Gordon 13 Oct '11

13 Oct '11

Hello, Has anyone managed to add a custom Template-Toolkit Filter when using Dancer ? Using TT directly, the code would looks like this: ====== sub my_custom_filter { my $text = shift ; ## Do something to $text; return $text; } my $tt = Template->new( { FILTERES => { 'my_custom_filter' => \&my_custom_filter } }); ====== Using Dancer, I see the TT->New() call is in "Dancer/Template/TemplateToolkit.pm", and I could even possibly add configuration options using "config.yml", but how do I specify a reference to a sub in my code ? Any suggestions will be appropriated, Thanks, -assaf.

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Re: [Dancer-users] Custom FILTERS for TemplateToolkit in dancer?
by Matthew Vickers 13 Oct '11

13 Oct '11

Hi Assaf, I could be completely off base, and please tell me if I am, when I need to use custom code in the template I use before_template sub { my $tokens = shift; $tokens->{'my_custom_filter'} = &custom_filter; }; Then I call the custom helper in the template like so <h1><% custom_filter("Hello World") %></h1> I have written a basic post here: http://www.quispiam.com/blog/post.php?s=2011-09-21-adding-custom-helper-met… Cheers Matt ----- "Assaf Gordon" <gordon(a)cshl.edu> wrote: > Hello, > > Has anyone managed to add a custom Template-Toolkit Filter when using > Dancer ? > > Using TT directly, the code would looks like this: > ====== > sub my_custom_filter { > my $text = shift ; > ## Do something to $text; > return $text; > } > > my $tt = Template->new( { > FILTERES => { 'my_custom_filter' => \&my_custom_filter } > }); > ====== > > > Using Dancer, I see the TT->New() call is in > "Dancer/Template/TemplateToolkit.pm", > and I could even possibly add configuration options using > "config.yml", but how do I specify a reference to a sub in my code ? > > Any suggestions will be appropriated, > > Thanks, > -assaf. > > _______________________________________________ > Dancer-users mailing list > Dancer-users(a)perldancer.org > http://www.backup-manager.org/cgi-bin/listinfo/dancer-users

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Re: [Dancer-users] more random bugs
by Puneet Kishor 12 Oct '11

12 Oct '11

On Oct 12, 2011, at 3:42 PM, Joel Roth wrote: >>> Hi Joel, Many thanks for checking it out and confirming my fears. > >>> I haven't fixed anything. It is just random. The white >>> characters on black background is "wrong" as it should >>> appear only when /present/ is present in the route. That >>> URI I gave above should always, 100% of the time, show >>> black characters on white background. Yes, the photo >>> should change as that is randomly selected. > > While I was writing, the site was briefly unavailable, Yeah... I rebooted to enable iCloud on my iMac. :-) > then the problem (seemed to have) disappeared. Did you diddle the site > at all? No, other than rebooting the computer, I have not done anything at all. > >>> This is very disconcerting. > >> as I mentioned above, which template is used is (or should >> be) determined solely by the route used. And, needless to >> say, the "presentation" template is exclusively within the >> `get '/present/:page_name'` route. The app doesn't even >> have any logins or any session implementation from me. >> Other than the fact that it is running on Starman, which, >> I guess, makes it a persistent application. > > Can you make it non-persistent just for testing purposes? > That might help narrow down the issue. > Rats... that is the more difficult part. I have no end of problem running Dancer apps with Apache, so I keep on gravitating toward Starman. That said, when, for a while, I was running apps with apache and plain CGI, I would never have any issues other than an ever so slightly slow-poke performance. Now I have close to 10 apps on this machine, so Apache is more problematic as either I run all the apps as plain CGI, or, any change in any one app would cause me to reboot apache, and thus restart all the apps. >> I can understand that if I had a web page accessible at >> punkish.org/present (being a stand alone, regular, black >> characters on white bg page) then that would conflict with >> punkish.org/present/a_page (being a route delivering a >> white chars on black bg presentation of a page called >> "a_page"). But, that is not the case. > > I would hope that there could be some kind of > debugging support to understand how Dancer > works through selecting the route and template. Well, there is the log that does show all the regexp shenanigans that happen in selecting a route. Maybe I should enable that in a development version, and then keep watching the logs. And then when I get a wrong template, try to see what the messages were at that point. Hmmm... will try that. > > Best, > > Joel > >> Très bizarre. >> >> Puneet. > > -- > Joel Roth

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more random bugs
by Puneet Kishor 12 Oct '11

12 Oct '11

random, in other words, not easy to reproduce. I have get '/present/:page_name' => sub { .. }; followed by get '/*?' => sub { .. }; Yet, from time to time, a regular web page, meant to be picked up the second route above, gets picked up by the first route, thereby sending the wrong html template. As I said, I can't reliably reproduce it, but from time to time, when I load my web site at http://punkish.org/The-Paradigm,-The-Framework,-and-The-Instantiation (notice, no "present" in the path_info), I get the wrong template. Please, please... my favorite Perl-thing, please don't turn buggy on me. I have close to a dozen apps riding on this, and I want it to be rock-solid-reliable. Puneet.

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session question
by Niels Larsen 03 Oct '11

03 Oct '11

If memcached is used as session engine, then session get and set will make a network request to whatever server is configured, I assume. Which is slower than first getting the entire session, then modifying it throughout the application, then saving it, as an after-template hook for example. But I do not see an operator to set an entire session? or is that a wrong-headed idea anyway? Niels Larsen http://genomics.dk (The memcached storage engine interface crashes, but is being fixed, Sawyer X wrote earlier. And this is, for me, not an urgent question, just curious).

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questions about speed
by Nick Knutov 02 Oct '11

02 Oct '11

Hello all, today I found, that previous version of our project (hosting billing system), written on perl, fastcgi and using CTPP as template engine generates pages faster, then new version of this project, written with dancer and ctpp and running with plackup/starman. The most part of the code remains the same, but we add cache(*) and reduce the number of SQL queries (this led to an increase of speed - we checked it). So the question - where should I look for the problem? The first idea - I know that HTML::CTPP2->new() takes a lot of time. It is called in Dancer::Template::Ctpp2, which is `use base 'Dancer::Template::Abstract';` so the question - is sub init() in this module runs only once when starting the app, or on every query? The second question - can this be because of plackup or starman? Where should I look in this case? ps: plackup -E production -s Starman --workers=4 -l bill.sock -a bin/app.pl One parallel query in all cases. pps: (*) about our cache - just in-memory hash with already loaded data from db, which returns already loaded data instead of making new query - this can not lead to taking more time on requests. And, without this cache, with the old code, it's just slower. -- Best Regards, Nick Knutov http://knutov.com ICQ: 272873706 Voice: +7-904-84-23-130

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