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

Bug in Dancer with HTTP_HOST
by Peter Gordon 19 Jan '11

19 Jan '11

I am trying to use dancer in standalone mode and testing it locally. I am using Ubuntu with Dancer 1.3000_02 In the screen dump I am seeing the HTTP_HOST variable set as: HTTP_HOST => 'localhost, 127.0.0.1:3000', It is used in Dancer/Request.pm and is used to build the next url, which clearly is incorrect. sub base { my $self = shift; my @env_names = qw( SERVER_NAME HTTP_HOST SERVER_PORT SCRIPT_NAME psgi.url_scheme ); my ($server, $host, $port, $path, $scheme) = @{$self->{env}}{@env_names}; $host =~ s!.*,\s+!! ; #pmg $scheme ||= $self->{'env'}{'PSGI.URL_SCHEME'}; # Windows Peter

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using a template to create a JSON structure to send back to an ajax request
by Puneet Kishor 18 Jan '11

18 Jan '11

As the subject line says, I would like to use a template to create a JSON structure that I would like to send back to the browser in response to an ajax request. Is that possible? Thanks. -- Puneet Kishor Sent with Sparrow

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request for feature
by Puneet Kishor 18 Jan '11

18 Jan '11

unless default params already exist, the following would make life a lot easier get '/foo/:foo_id?/bar/:bar_id?' => sub { my $foo_id = params->{'foo_id'} || <default foo value>; my $bar_id = params->{'bar_id'} || <default bar value>; }; Many thanks, -- Puneet Kishor

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status code needs to be an integer greater than or equal to 100...
by Puneet Kishor 17 Jan '11

17 Jan '11

I am quite frustrated with Dancer's error reporting, perhaps the only part of it that needs improvement, since the rest of Dancer is so wonderful. I am getting the dreaded, "status code needs to be an integer greater than or equal to 100 at /usr/local/lib/perl5/site_perl/5.12.1/Plack/Middleware/StackTrace.pm line 27" message in my browser, all nicely and neatly formatted. I can't for the life of me figure out what is triggering this, so the only recourse I have is to comment my code completely and then uncomment lines one by one. Any suggestions on how I can make this process more scientific and quick? Besides this, the problem is that Dancer seems to report messages in different ways depending on when the error is trapped. Sometimes, I get this nicely formatted message, colors and all, in my browser. Sometimes, I get just a plain text message in my browser. Sometimes, I get the "Internal Server Error" and then I have to pore through the Apache logs. This inconsistency makes for difficulty. Many thanks, -- Puneet Kishor

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Dancer flier for FOSDEM
by Gabor Szabo 17 Jan '11

17 Jan '11

Hi, FOSDEM is less than 3 weeks away and I'd like to have a few Perl related fliers to be available at our booth. I know the BSD people have some 20 or 30 different fliers for various fields. We are going to have a generic Perl related flier. I am working on a "Testing with Perl" flier and probably a "Padre, the Perl IDE" flier. It would be awesome to have something to give away about Dancer as well. IMHO it does not need to be perfect but it should look nice that later can be improved. As I hardly know anything about Dancer I think it would be much better if other people put something together. The idea is to give something to people they can read on the bus/train/flight and hopefully will remind them even a few days after FOSDEM. The size of the document should be one or two sides of A4. In order to be able to print the document I'll need to have it within 2 days. I hope someone will have the time to produce a first draft quickly. regards Gabor -- Gabor Szabo http://szabgab.com/ Perl Ecosystem Group http://perl-ecosystem.org/

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get the right lib path
by Puneet Kishor 17 Jan '11

17 Jan '11

I am trying to build a little framework for myself with some custom functionality. Consider the following /Users/punkish/Sites/app/lib/mydance.pm --------------------------------------- package mydance; use Dancer ':syntax'; use Dancer::Plugin::Email; use Crypt::GeneratePassword; use DBI; prefix '/mydance'; get '/' => sub { template '/index', opts(); }; sub opts { return { app_name => config->{app_name} } } /Users/punkish/Sites/app/lib/app.pm ----------------------------------- package app; use Dancer ':syntax'; use base 'mydance'; get '/' => sub { template 'index.tt', __PACKAGE__->SUPER::opts(); }; ----- If I remove the `use base 'mydance'` line and remove the call to `__PACKAGE__->SUPER::opts()` the above works, but of course, the app is not base-d on mydance. With the code as above, I get the dancer 404 "this is the void" message. What am I doing wrong? Eventually, I would like to move mydance to some other central location that would be in @INC, so other applications I develop can also be base-d on mydance. Puneet.

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Template run time error.
by Carlos Ivan Sosa 15 Jan '11

15 Jan '11

Hello I just started using Dancer, and I find it quite useful for mid-size webpages. I'm playing with it, but while trying out something like the blog engine in Perl Dancer Advent Calendar, I came to a problem of my own. I'm using damog's Dancer::Template::Haml wich is a wrapper for Text::Haml I will post my app.pm: --------------------------------------------------------------------------------------------------------------------------------------- package log; use Dancer ':syntax'; use DBI; our $VERSION = '0.1'; my $database = "lib/database.db"; sub connect_db { my $dbh = DBI->connect("dbi:SQLite:dbname=".$database) or die $DBI::errstr; return $dbh; } sub exec_sql { my $db = connect_db(); my $sql = "select id, url, title, text from entries where url ='".$_[0]."'"; my $sth = $db->prepare($sql) or die $db->errstr; $sth->execute or die $sth->errstr; return $sth->fetchrow_hashref(); $sth->finish(); } get '/' => sub { layout 'index'; my $entry = "hola"; my $field = exec_sql($entry); template 'index' => { 'url' => $field->{url}, 'title' => $field->{title}, 'text' => $field->{text}, }; }; get '/archive' => sub { return "This is the archive."; }; get '/:entr', sub { my $entry = params->{entr}; my $field = exec_sql($entry); template 'entries' => { title => $field->{title}, text => $field->{text}, }; }; true; --------------------------------------------------------------------------------------------------------------------------------------- The everything works correctly when you go to the root directory, everything is output as expected. But as soon as you go to http://localhost:3000/hola, the output is a run time error with a 404 Error. Please let me know if you need anymore information.

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drinkup meeting / FOSDEM
by franck 14 Jan '11

14 Jan '11

Hi everyboby As every two months, for those of you around Paris, we will organize a little drinkup meeting in a bar [1] the 27th of this month. Maybe some of you will be in brussels in early february for the FOSDEM. If you are, we could also organize something there, so drop a mail on the ML so we can work on something. [1] http://maps.google.fr/maps?q=BlueBuo%C3%AF+Caf%C3%A9,+50,+Boulevard+de+Vaug…

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Conditional Matching
by ambs 13 Jan '11

13 Jan '11

Hello I have a form with two submit buttons. I do not want to have js to detect what submit button was used to redirect the script for two different actions. Looking to the documentation I found out conditional matching. So, my doubt is: is there any chance on using conditional matching to detect what submit button was used? (basically, is there any way to access to the CGI parameters on the conditional matching portion of routes?) Thank you kindest regards, ambs

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Detailed write-up on deploying a Dancer application to Amazon's EC2
by Deepak Gulati 13 Jan '11

13 Jan '11

Hi Folks, Here are some notes from deploying my first Dancer application (http://stupidtwitterstats.com/) into production: http://www.deepakg.com/prog/2011/01/deploying-a-perl-dancer-application-on-… Thanks, Deepak p.s. my shared host is acting up today so if you cannot reach the blog link in first attempt, please do try again.

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