Jiro Nishiguchi()id:[email protected]/09/09
Yokohama.pm in YAPC::Asia 2009
Schenker
a DSL for quickly creating web applications in Perl.
$self
PAUSE ID: JIROhttp://search.cpan.org/~jiro/
Image::ObjectDetect
Text::Migemoetc...
http://d.hatena.ne.jp/spiritloose/
What's Schenker?
A DSL for quickly creating web applications in Perl
Inspired by Ruby's Sinatra
What's Sinatra?
# myapp.rbrequire 'sinatra'
get '/' do 'hello, world!'end
Schenker
package MyApp;use Schenker;
get '/' => sub { 'hello, world!';};(ry
Similar frameworks
Mojolicious::Litehttp://search.cpan.org/dist/Mojo/
Dancerhttp://search.cpan.org/dist/Dancer/
Requirements
Schenker HTTP::Engine + HTTP::Engine::Middleware(feature Plack +
Plack::Middleware)
Sinatra Rack + Rack::Middleware
What's HTTP::Engine?
Web Server(Apache, Lighttpd and etc) HTTP::Engine .= Rack(Ruby)
.= WSGI(Python) Web Application Framework(Catalyst, Rails, Django
and etc)
SYNOPSIS
$ cat > myapp.plpackage MyApp;use Schenker;get '/' => sub
{ 'Hello, world!';};$ ./myapp.pl & && firefox
http://localhost:4567/
Easy!
No helpers
No configuration
Schenker supports
Configurations
Routing
Controller
Views
No models (use your favorite modules)
Command line options
./myapp.pl --helpUsage: ./hoge.pl [OPTIONS] -h, --help display
this help -H, --host set the host -p, --port=PORT set the port -e,
--environment=ENV set the environment -s, --server=SERVER
HTTP::Engine interface=== snip ===
Configuration
configure development => sub { set port => 8080; set host
=> '127.0.0.1'; set server => 'AnyEvent'; enable 'sessions';
disable 'run';};
Routing
get '/' => sub {};post '/' => sub {};put '/' => sub
{};Delete '/' => sub {};
get '/' => host => 'example.com' => sub {};get '/'
=> agent => qr/MobileSafari/ => sub {};
Method override
post '/' => sub {};put '/' => sub {};
Paramaters
get '/' => sub { params->{foo}; param('foo');};
Nested paramaters
# index.tt
# myapp.plparams->{entry}; # { title => '', body => ''
}
Path paramaters
get '/user/:user' => sub { my $args = shift; "hello,
$args->{user}!";};
Encoding
set encode => { encode => 'utf-8', decode => 'utf-8'
};get '/user/:name' => sub { my $args = shift; ok
utf8::is_utf8($args->{name}); ok
utf8::is_utf8(params->{foo});};
View
Template-Toolkit
Text::MicroTemplate
Template-Toolkit
tt_options WRAPPER => 'layout.tt';get '/tt' => sub { tt
'index'; # views/index.tt};
In-file Template
get '/' => sub { stash name => 'Michael Schenker'; tt
'index';};__END__@@ indexhello, [% name %]!
TT with PadWalker
get '/hello/:name' => sub { my $args = shift; tt
'index';};__END__@@ indexhello, [% args.name %]!
Text::MicroTemplate
get '/mt' => sub { mt 'index' # views/index.mt};
Helpers
helper foo => sub { "foo$_[0]";};
get '/' => sub { foo('bar') };[% foo('bar') %]
Before filters
Before sub { stash now => DateTime->now;};get '/' =>sub
{ stash->{now};};[% now %]
Functions
get '/' => sub { request; # HTTP::Engine::Request response; #
HTTP::Engine::Response status 200; body 'hello, world!'; headers
'X-Hoge' => 'hoge'; back; # Referer};
Example: Image File
get '/qrcode' => sub { my $text = params->{text};
content_type 'image/png';
GD::Barcode::QRcode->new($text)->plot->png;};
Example: Send file
get '/' => sub { send_file 'image.jpg';};get '/' => sub {
send_file 'image.jpg', filename => 'image.jpg';};
Halting
get '/' => sub { halt; do_something(); # NOTREACHED};get '/'
=> sub { redirect 'http://www.yahoo.co.jp/'; do_something(); #
NOTREACHED};
Error Handling
define_error MyError => sub { status 500; tt 'myerror';};get
'/' => sub { raise MyError; do_something(); # NOTREACHED};
Sessions
enable 'sessions';
get '/' => sub { session; # HTTP::Session
session->get('foo'); session->set(foo => 'bar');};
Sample Application
Rails scaffold like CRUD interfacewith
DBIx::Classhttp://github.com/spiritloose/schenker-sample/Runs on
CGI, FastCGI, mod_perl, AnyEvent, POE...Includes configuration file
(eg: httpd.conf)
TODO
Release
PSGI, Plack
Documentation
Extending Schenker
Thanks!
Referenceshttp://github.com/spiritloose/Schenker
http://www.sinatrarb.com/
http://d.hatena.ne.jp/spiritloose/
