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Dancer2 sessions under Plack

by fishboy (Initiate)
on Nov 28, 2013 at 04:42 UTC ( #1064730=perlquestion: print w/replies, xml ) Need Help??

fishboy has asked for the wisdom of the Perl Monks concerning the following question:

I'm attempting to deploy the Dancer2::Tutorial app with Plack::Handler::Apache2 and having problems implementing Sessions using the following setup:

appname: "TestSession" layout: "main" charset: "UTF-8" # session setup session: YAML engines: session: YAML: session_dir: /tmp/dancer-sessions # template engine template: "template_toolkit" engines: template: template_toolkit: start_tag: '[%' end_tag: '%]'

#!/usr/bin/env perl use FindBin; use lib "$FindBin::Bin/../lib"; use TestSession; TestSession->dance; code

package TestSession; use Dancer2; our $VERSION = '0.11'; use DBI; use File::Spec; use File::Slurp; use Template; set 'logger' => 'file'; set 'log' => 'debug'; set 'show_errors' => 1; set 'startup_info' => 1; set 'warnings' => 1; set 'username' => 'admin'; set 'password' => 'password'; set 'layout' => 'main'; my $timestamp = localtime; my $login_status; my $dbh = DBI->connect('DBI:mysql:testsession','test','dr_dfRFgt@');\ my $flash; sub set_flash { my $message = shift; $flash = $message; } sub get_flash { my $msg = $flash; $flash = ""; return $msg; } hook before_template => sub { my $tokens = shift; $tokens->{'session_logged_in'} = session('logged_in'); $tokens->{'css_url'} = request->base . 'css/style.css'; $tokens->{'login_url'} = uri_for('/login'); $tokens->{'logout_url'} = uri_for('/logout'); }; get '/' => sub { my $sql = 'select id, etitle, etext from entries order by id desc +'; my $sth = $dbh->prepare($sql) or die $dbh->errstr; $sth->execute or die $sth->errstr; template '', { 'session_logged_in' => session('logged_in'), 'msg' => get_flash(), 'add_entry_url' => uri_for('/add'), 'entries' => $sth->fetchall_hashref('id'), }; }; post '/add' => sub { if (not $login_status) { debug "add route attempted with login_status $login_status"; send_error("Not logged in", 401); } debug "login_status $login_status: adding entry on status $login_ +status"; my $sql = 'insert into entries (etitle, etext) values (?, ?)'; my $sth = $dbh->prepare($sql) or die $dbh->errstr; $sth->execute(params->{'etitle'}, params->{'etext'}) or die $sth- +>errstr; set_flash('New entry posted!'); redirect '/'; }; any ['get', 'post'] => '/login' => sub { my $err; if ( request->method() eq "POST" ) { debug "executing login attempt\n"; # process form input if ( params->{'username'} ne setting('username') ) { $err = "Invalid username"; debug "Got Invalid username"; } elsif ( params->{'password'} ne setting('password') ) { $err = "Invalid password"; debug "Got Invalid password"; } else { debug "Login Successful"; session logged_in => true; $login_status = 1; debug "login_status:".session('logged_in'); set_flash('You are logged in.'); redirect '/'; } } # display login form template '', { 'err' => $err, }; }; get '/logout' => sub { debug "login:\t executng LOGOUT\n"; context->destroy_session; $login_status = 0; debug "login_status on LOGOUT:\t$login_status"; set_flash('You are logged out.'); debug "login LOGOUT flash message: ".$flash; redirect '/'; }; start; true;

Apache 2 virtualhosts.conf entry.

<VirtualHost> ServerAdmin DocumentRoot /var/www/retireaboard/RetireAboard ServerName <Directory "/var/www/retireaboard/RetireAboard"> AllowOverride None Order allow,deny Allow from all </Directory> <Location /> SetHandler perl-script PerlResponseHandler Plack::Handler::Apache2 PerlSetVar psgi_app /var/www/retireaboard/RetireAboard/bin/app </Location> SetEnv DANCER_ENVIRONMENT "development" ErrorLog /var/log/httpd/ CustomLog /var/log/httpd/retireaboard_access.log combined </VirtualHost>

httpd error log

[Wed Nov 27 01:15:53 2013] [error] [client] Error while lo +ading /var/www/retireaboard/RetireAboard/bin/ Unable to create + session dir : ./sessions : Permission denied at (eval 135) line 11\n +Compilation failed in require at /var/www/retireaboard/RetireAboard/b +in/ line 6.\nBEGIN failed--compilation aborted at /var/www/reti +reaboard/RetireAboard/bin/ line 6.\n

Using Plack::Handler::Apache2 to deploy the app with Apache2 causes the compile to fail. The app is unable to create a ./session dir despite having full rwx permissions for the appdir.
Exactly the same failure occurs for JSON sessions.
Is there further Plack setup required in the .pm file?

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Re: Dance2 sessions under Plack
by Anonymous Monk on Nov 28, 2013 at 04:49 UTC
    The error message shows ./sessions but in your configuration you show /tmp/dancer-sessions , so there is your problem :) whatever it is

    Maybe you're reading the wrong documentation? Dancer2 is not Dancer

      Even though config.yml sets the session_dir to /tmp/dancer_sessions, the app still tries to use ./sessions, that's an issue.
      I am reading and using the Dancer2 docs throughout.

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