perl dancer, fpw 2010
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Perl Dancer
Journes Perl 2010
11 juin 2010, Calais
Alexis Sukrieh
Twitter: @sukriaCPAN: sukriahttp://www.sukria.net
http://perldancer.org
$ sudo cpanm Dancer
http://github.com/sukria/Dancer
framework web pour Perl
Encore un ?
OUI
Pourquoi ?
Dpasser CGI.pm
Oublier CGI.pm
Sans devenir Catalyst
Apporter une diffrence
Ruby
Nouvelle approche
Pourquoi pas Perl ?
Dancer
Dancer est un framework...
un micro framework
Lger
Autonome
Peu de dpendances
Compatible PSGI/Plack
Facile
Evolutif
Hello World
package MyApp;use Dancer;
get '/' => sub {'Hello FPW 2010!'};
dance;
serveur web embarqu
$ ./myApp.pl>> Listening on 127.0.0.1:3000== Entering the development dance floor ...
Crer une application
Gnration d'un squellette
$ dancer -a WebApp+ WebApp/app.psgi+ WebApp/config.yml+ WebApp/environments[...]+ WebApp/lib/WebApp.pm+ WebApp/views+ WebApp/views/index.tt[...]+ WebApp/WebApp.pl+ WebApp/t/002_index_route.t+ WebApp/t/001_base.t+ WebApp/Makefile.PL
Layout CPAN-friendly
Dancer::Test
use Test::More tests => 3;use WebApp;use Dancer::Test;
route_exists [GET => '/'];response_status_is ['GET' => '/'], 200;
Application pr-configure
config.ymlenvironments/development.ymlenvironments/production.yml
# config.yml
layout: 'application'foo: 42content_type: 'text/plain'
config.yml
=
Configuration globale
development.yml
warnings: 1show_errors: 1auto_reload: 1
production.yml
warnings: 0show_errors: 0auto_reload: 0
$ ./WebApp.pl -e production
Dmarre l'application avec l'environnement production
Ready to rock!
Les route handlers
mthode HTTP
+ path
+ sub { }
get '/' => sub { ...};
get '/' => sub { ...};
get '/' => sub { ...};
get '/' => sub { ...};
/foo/bar/:var/baz/*r('/stuff/([a-z0-9]+)/')
/foo/bar/:var/baz/*r('/stuff/([a-z0-9]+)/')qr{/stuff/([a-z0-9]+)/} NEW
Chemins statiques
//foo/bar/baz
Chemins avec tokens
/hello/:buddy
my $name = params->{buddy}
Chemins avec jokers
/show/*.*
my ($file, $ext) = splat;
Chemins avec expressions rgulires
r('/post/([a-z0-9]+)')
my ($post) = splat; # $1
Dancer est un aiguilleur
Vers le bon route handler
404
Si aucun ne correspond
$appdir/public
Route handler trouv, Execution de son code
Un seul objectif
La rponse
Contenu
get '/showme' => sub {template 'showme', { var => 'foo'};};
Headers
get '/' => sub {headers 'X-MyHead1' => 42;...};
Requte
get '/' => sub {my $path = request->path;my @uploads = request->uploads();my $h1 = request->header('X-MyHead1');...};
Passer
get '/lazy' => sub {pass;};
Servir un fichier
get '/dowload/:file' => sub {my $file = params->{file};send_file $file;};
Dclencher une erreur
get '/forbidden' => sub {send_error 'Nope';};
Rediriger
get '/forbidden' => sub {redirect '/better/place';};
valeur de retour
=
contenu de la rponse
FonctionnalitsAvances
Logs
Usage
get '/' => sub {
debug 'poupoutte';warning 'a warning';error 'an error';
};
Configuration
log: core|debug|warning|errorlogger: file|console|...
sukria@razor:/tmp/WebApp$ ./WebApp.pl [28877] core @0.000011> loading application WebApp in ./WebApp.pl l. 3[28877] core @0.002561> loading Standalone handler in /usr/local/share/perl/5.10.1/Dancer.pm l. 193[28877] core @0.000054> request: GET / in /usr/local/share/perl/5.10.1/Dancer/Handler/Standalone.pm l. 39[28877] debug @0.000326> [hit #1] a debug in /tmp/WebApp/lib/WebApp.pm l. 7
Logger engines
Dancer::Logger::FileDancer::Logger::ConsoleDancer::Logger::SyslogDancer::Logger::LogHandler...
Sessions
Interface universelle
Ecrire
post '/login' => sub { ... if ($user) { session 'user' => $user; }};
Lire
get '/home' => sub { ... unless (session('user')) { return redirect '/login'; }};
Session engines
Dancer::Session::SimpleDancer::Session::YAMLDancer::Session::MemcacheDancer::Session::StorableDancer::Session::Cookie...
Filtres
Initialiser un contexte
before sub { var 'foo' => 42;var 'dbh' => DBI->connect(...);};
Stopper l'execution
before sub { ...return halt('stop here');};
Contrles systmatiques
before sub { if (not session('user')) {redirect '/login';}};
Serializers
Valeur de retourSerialise
set serializer => 'JSON';
get => '/user/:id' => sub {...return { user => $user };};
Sans serializer
$ curl http://0:3000/user/42HASH(0x295d568)
Avec serializer
$ curl http://0:3000/user/42{"name":"Larry Wall","id":42}
Serializer engines
Dancer::Serializer::JSONDancer::Serializer::YAMLDancer::Serializer::DumperDancer::Serializer::Mutable
Plugins
Enrichir la syntaxe
Design patterns
use Dancer::Plugin::Database;
get '/' =>sub {...my $sth = database->prepare(...);};
Ecrire un plugin
package Dancer::Plugin::FPW2010; use Dancer::Plugin;
register 'add_fpw2010_route' => sub {get '/fpw2010' => sub { 'Bonjour FPW 2010 !' };};
register_plugin;
Deja plusieurs plugins sur CPAN
Dancer::Plugin::ValidationDancer::Plugin::DatabaseDancer::Plugin::RESTDancer::Plugin::Email...
Dploiement
Pour dployer Dancer
PSGI/Plack
Plack - PerlRack - RubyWSGI - Python
Adaptateur universel
serveur / application
app.psgi
connecteur Plack
$ plackup -a app.psgi &
Tous les serveurs webont des adaptateurs PSGI
Apache (mod_psgi)NginxStarmanPerlbalHTTP::Server::PSGIHTTP::Server::Fast...
Exemple Apache
SetHandler perl-script PerlResponseHandlerPlack::Handler::Apache2PerlSetVar psgi_app /path/to/app.psgi
CGI: dispatch.cgiFastCGI: dispatch.fcgiPlack::Handler::AnyEventPlack::Handler::StarmanPlack::Handler::*...
Ecosystme
Dancer::Cookbook Dancer::Deployment Dancer::Template::Simple Dancer::Template::TemplateToolkit Dancer::Test Dancer::Session::YAML Dancer::Session::Simple Dancer::Introduction Dancer::Template::Alloy Dancer::Template::TemplateSandbox Dancer::Template::Tenjin Task::Dancer Dancer::Plugin::Database Dancer::Template::HtmlTemplate Dancer::Logger::Syslog Dancer::Session::Storable Dancer::Plugin::REST Dancer::Plugin::Validation Dancer::Template::Tiny Dancer::Plugin::SiteMap Dancer::Plugin::Email Dancer::Template::Haml Dancer::Serializer::YAML Dancer::Template::Mason Dancer::Session::Memcache Dancer::Template::MicroTemplate Dancer::Session::Memcache Dancer::Session::Cookie Dancer::Serializer::XML Dancer::Serializer::Mutable Dancer::Serializer::JSON Dancer::Logger::LogHandler ...
GitHub
30 forks130 followers
+50 distributions
+10 auteurs
Communautirc.perl.org/#[email protected]
Docs
DancerDancer::IntroductionDancer::CookbookDancer::Deployment...
http://perldancer.org