package Catalyst;
use strict;
use base 'Catalyst::Component';
use bytes;
use Catalyst::Exception;
use Catalyst::Log;
use Catalyst::Request;
use Catalyst::Request::Upload;
use Catalyst::Response;
use Catalyst::Utils;
use Catalyst::Controller;
use Devel::InnerPackage ();
use File::stat;
use Module::Pluggable::Object ();
use NEXT;
use Text::SimpleTable ();
use Path::Class::Dir ();
use Path::Class::File ();
use Time::HiRes qw/gettimeofday tv_interval/;
use URI ();
use URI::http;
use URI::https;
use Scalar::Util qw/weaken blessed/;
use Tree::Simple qw/use_weak_refs/;
use Tree::Simple::Visitor::FindByUID;
use attributes;
use utf8;
use Carp qw/croak carp/;
BEGIN { require 5.008001; }
__PACKAGE__->mk_accessors(
qw/counter request response state action stack namespace stats/
);
sub depth { scalar @{ shift->stack || [] }; }
# Laziness++
*comp = \&component;
*req = \&request;
*res = \&response;
# For backwards compatibility
*finalize_output = \&finalize_body;
# For statistics
our $COUNT = 1;
our $START = time;
our $RECURSION = 1000;
our $DETACH = "catalyst_detach\n";
__PACKAGE__->mk_classdata($_)
for qw/components arguments dispatcher engine log dispatcher_class
engine_class context_class request_class response_class stats_class
setup_finished/;
__PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
__PACKAGE__->engine_class('Catalyst::Engine::CGI');
__PACKAGE__->request_class('Catalyst::Request');
__PACKAGE__->response_class('Catalyst::Response');
__PACKAGE__->stats_class('Catalyst::Stats');
# Remember to update this in Catalyst::Runtime as well!
our $VERSION = '5.7014';
sub import {
my ( $class, @arguments ) = @_;
# We have to limit $class to Catalyst to avoid pushing Catalyst upon every
# callers @ISA.
return unless $class eq 'Catalyst';
my $caller = caller(0);
unless ( $caller->isa('Catalyst') ) {
no strict 'refs';
push @{"$caller\::ISA"}, $class, 'Catalyst::Controller';
}
$caller->arguments( [@arguments] );
$caller->setup_home;
}
=head1 NAME
Catalyst - The Elegant MVC Web Application Framework
=head1 SYNOPSIS
See the L<Catalyst::Manual> distribution for comprehensive
documentation and tutorials.
# Install Catalyst::Devel for helpers and other development tools
# use the helper to create a new application
catalyst.pl MyApp
# add models, views, controllers
script/myapp_create.pl model MyDatabase DBIC::Schema create=dynamic dbi:SQLite:/path/to/db
script/myapp_create.pl view MyTemplate TT
script/myapp_create.pl controller Search
# built in testserver -- use -r to restart automatically on changes
# --help to see all available options
script/myapp_server.pl
# command line testing interface
script/myapp_test.pl /yada
### in lib/MyApp.pm
use Catalyst qw/-Debug/; # include plugins here as well
### In lib/MyApp/Controller/Root.pm (autocreated)
sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
$c->stash->{template} = 'foo.tt'; # set the template
# lookup something from db -- stash vars are passed to TT
$c->stash->{data} =
$c->model('Database::Foo')->search( { country => $args[0] } );
if ( $c->req->params->{bar} ) { # access GET or POST parameters
$c->forward( 'bar' ); # process another action
# do something else after forward returns
}
}
# The foo.tt TT template can use the stash data from the database
[% WHILE (item = data.next) %]
[% item.foo %]
[% END %]
# called for /bar/of/soap, /bar/of/soap/10, etc.
sub bar : Path('/bar/of/soap') { ... }
# called for all actions, from the top-most controller downwards
sub auto : Private {
my ( $self, $c ) = @_;
if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
$c->res->redirect( '/login' ); # require login
return 0; # abort request and go immediately to end()
}
return 1; # success; carry on to next action
}
# called after all actions are finished
sub end : Private {
my ( $self, $c ) = @_;
if ( scalar @{ $c->error } ) { ... } # handle errors
return if $c->res->body; # already have a response
$c->forward( 'MyApp::View::TT' ); # render template
}
### in MyApp/Controller/Foo.pm
# called for /foo/bar
sub bar : Local { ... }
# called for /blargle
sub blargle : Global { ... }
# an index action matches /foo, but not /foo/1, etc.
sub index : Private { ... }
### in MyApp/Controller/Foo/Bar.pm
# called for /foo/bar/baz
sub baz : Local { ... }
# first Root auto is called, then Foo auto, then this
sub auto : Private { ... }
# powerful regular expression paths are also possible
sub details : Regex('^product/(\w+)/details$') {
my ( $self, $c ) = @_;
# extract the (\w+) from the URI
my $product = $c->req->captures->[0];
}
See L<Catalyst::Manual::Intro> for additional information.
=head1 DESCRIPTION
Catalyst is a modern framework for making web applications without the
pain usually associated with this process. This document is a reference
to the main Catalyst application. If you are a new user, we suggest you
start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
See L<Catalyst::Manual> for more documentation.
Catalyst plugins can be loaded by naming them as arguments to the "use
Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
C<My::Module>.
use Catalyst qw/My::Module/;
If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
fully qualify the name by using a unary plus:
use Catalyst qw/
My::Module
+Fully::Qualified::Plugin::Name
/;
Special flags like C<-Debug> and C<-Engine> can also be specified as
arguments when Catalyst is loaded:
use Catalyst qw/-Debug My::Module/;
The position of plugins and flags in the chain is important, because
they are loaded in the order in which they appear.
The following flags are supported:
=head2 -Debug
Enables debug output. You can also force this setting from the system
environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
settings override the application, with <MYAPP>_DEBUG having the highest
priority.
=head2 -Engine
Forces Catalyst to use a specific engine. Omit the
C<Catalyst::Engine::> prefix of the engine name, i.e.:
use Catalyst qw/-Engine=CGI/;
=head2 -Home
Forces Catalyst to use a specific home directory, e.g.:
use Catalyst qw[-Home=/usr/mst];
This can also be done in the shell environment by setting either the
C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
is replaced with the uppercased name of your application, any "::" in
the name will be replaced with underscores, e.g. MyApp::Web should use
MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
=head2 -Log
Specifies log level.
=head2 -Stats
Enables statistics collection and reporting. You can also force this setting
from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
environment settings override the application, with <MYAPP>_STATS having the
highest priority.
e.g.
use Catalyst qw/-Stats=1/
=head1 METHODS
=head2 INFORMATION ABOUT THE CURRENT REQUEST
=head2 $c->action
Returns a L<Catalyst::Action> object for the current action, which
stringifies to the action name. See L<Catalyst::Action>.
=head2 $c->namespace
Returns the namespace of the current action, i.e., the URI prefix
corresponding to the controller of the current action. For example:
# in Controller::Foo::Bar
$c->namespace; # returns 'foo/bar';
=head2 $c->request
=head2 $c->req
Returns the current L<Catalyst::Request> object, giving access to
information about the current client request (including parameters,
cookies, HTTP headers, etc.). See L<Catalyst::Request>.
=head2 REQUEST FLOW HANDLING
=head2 $c->forward( $action [, \@arguments ] )
=head2 $c->forward( $class, $method, [, \@arguments ] )
Forwards processing to another action, by its private name. If you give a
class name but no method, C<process()> is called. You may also optionally
pass arguments in an arrayref. The action will receive the arguments in
C<@_> and C<< $c->req->args >>. Upon returning from the function,
C<< $c->req->args >> will be restored to the previous values.
Any data C<return>ed from the action forwarded to, will be returned by the
call to forward.
my $foodata = $c->forward('/foo');
$c->forward('index');
$c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/);
$c->forward('MyApp::View::TT');
Note that forward implies an C<<eval { }>> around the call (actually
C<execute> does), thus de-fatalizing all 'dies' within the called
action. If you want C<die> to propagate you need to do something like:
$c->forward('foo');
die $c->error if $c->error;
Or make sure to always return true values from your actions and write
your code like this:
$c->forward('foo') || return;
=cut
sub forward { my $c = shift; $c->dispatcher->forward( $c, @_ ) }
=head2 $c->detach( $action [, \@arguments ] )
=head2 $c->detach( $class, $method, [, \@arguments ] )
=head2 $c->detach()
The same as C<forward>, but doesn't return to the previous action when
processing is finished.
When called with no arguments it escapes the processing chain entirely.
=cut
sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
=head2 $c->response
=head2 $c->res
Returns the current L<Catalyst::Response> object, see there for details.
=head2 $c->stash
Returns a hashref to the stash, which may be used to store data and pass
it between components during a request. You can also set hash keys by
passing arguments. The stash is automatically sent to the view. The
stash is cleared at the end of a request; it cannot be used for
persistent storage (for this you must use a session; see
L<Catalyst::Plugin::Session> for a complete system integrated with
Catalyst).
$c->stash->{foo} = $bar;
$c->stash( { moose => 'majestic', qux => 0 } );
$c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
# stash is automatically passed to the view for use in a template
$c->forward( 'MyApp::View::TT' );
=cut
sub stash {
my $c = shift;
if (@_) {
my $stash = @_ > 1 ? {@_} : $_[0];
croak('stash takes a hash or hashref') unless ref $stash;
foreach my $key ( keys %$stash ) {
$c->{stash}->{$key} = $stash->{$key};
}
}
return $c->{stash};
}
=head2 $c->error
=head2 $c->error($error, ...)
=head2 $c->error($arrayref)
Returns an arrayref containing error messages. If Catalyst encounters an
error while processing a request, it stores the error in $c->error. This
method should only be used to store fatal error messages.
my @error = @{ $c->error };
Add a new error.
$c->error('Something bad happened');
=cut
sub error {
my $c = shift;
if ( $_[0] ) {
my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
croak @$error unless ref $c;
push @{ $c->{error} }, @$error;
}
elsif ( defined $_[0] ) { $c->{error} = undef }
return $c->{error} || [];
}
=head2 $c->state
Contains the return value of the last executed action.
=head2 $c->clear_errors
Clear errors. You probably don't want to clear the errors unless you are
implementing a custom error screen.
This is equivalent to running
$c->error(0);
=cut
sub clear_errors {
my $c = shift;
$c->error(0);
}
# search via regex
sub _comp_search {
my ( $c, @names ) = @_;
foreach my $name (@names) {
foreach my $component ( keys %{ $c->components } ) {
return $c->components->{$component} if $component =~ /$name/i;
}
}
return undef;
}
# try explicit component names
sub _comp_explicit {
my ( $c, @names ) = @_;
foreach my $try (@names) {
return $c->components->{$try} if ( exists $c->components->{$try} );
}
return undef;
}
# like component, but try just these prefixes before regex searching,
# and do not try to return "sort keys %{ $c->components }"
sub _comp_prefixes {
my ( $c, $name, @prefixes ) = @_;
my $appclass = ref $c || $c;
my @names = map { "${appclass}::${_}::${name}" } @prefixes;
my $comp = $c->_comp_explicit(@names);
return $comp if defined($comp);
$comp = $c->_comp_search($name);
return $comp;
}
# Find possible names for a prefix
sub _comp_names {
my ( $c, @prefixes ) = @_;
my $appclass = ref $c || $c;
my @pre = map { "${appclass}::${_}::" } @prefixes;
my @names;
COMPONENT: foreach my $comp ($c->component) {
foreach my $p (@pre) {
if ($comp =~ s/^$p//) {
push(@names, $comp);
next COMPONENT;
}
}
}
return @names;
}
# Return a component if only one matches.
sub _comp_singular {
my ( $c, @prefixes ) = @_;
my $appclass = ref $c || $c;
my ( $comp, $rest ) =
map { $c->_comp_search("^${appclass}::${_}::") } @prefixes;
return $comp unless $rest;
}
# Filter a component before returning by calling ACCEPT_CONTEXT if available
sub _filter_component {
my ( $c, $comp, @args ) = @_;
if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
return $comp->ACCEPT_CONTEXT( $c, @args );
}
else { return $comp }
}
=head2 COMPONENT ACCESSORS
=head2 $c->controller($name)
Gets a L<Catalyst::Controller> instance by name.
$c->controller('Foo')->do_stuff;
If the name is omitted, will return the controller for the dispatched
action.
=cut
sub controller {
my ( $c, $name, @args ) = @_;
return $c->_filter_component( $c->_comp_prefixes( $name, qw/Controller C/ ),
@args )
if ($name);
return $c->component( $c->action->class );
}
=head2 $c->model($name)
Gets a L<Catalyst::Model> instance by name.
$c->model('Foo')->do_stuff;
Any extra arguments are directly passed to ACCEPT_CONTEXT.
If the name is omitted, it will look for
- a model object in $c->stash{current_model_instance}, then
- a model name in $c->stash->{current_model}, then
- a config setting 'default_model', or
- check if there is only one model, and return it if that's the case.
=cut
sub model {
my ( $c, $name, @args ) = @_;
return $c->_filter_component( $c->_comp_prefixes( $name, qw/Model M/ ),
@args )
if $name;
if (ref $c) {
return $c->stash->{current_model_instance}
if $c->stash->{current_model_instance};
return $c->model( $c->stash->{current_model} )
if $c->stash->{current_model};
}
return $c->model( $c->config->{default_model} )
if $c->config->{default_model};
return $c->_filter_component( $c->_comp_singular(qw/Model M/) );
}
=head2 $c->controllers
Returns the available names which can be passed to $c->controller
=cut
sub controllers {
my ( $c ) = @_;
return $c->_comp_names(qw/Controller C/);
}
=head2 $c->view($name)
Gets a L<Catalyst::View> instance by name.
$c->view('Foo')->do_stuff;
Any extra arguments are directly passed to ACCEPT_CONTEXT.
If the name is omitted, it will look for
- a view object in $c->stash{current_view_instance}, then
- a view name in $c->stash->{current_view}, then
- a config setting 'default_view', or
- check if there is only one view, and return it if that's the case.
=cut
sub view {
my ( $c, $name, @args ) = @_;
return $c->_filter_component( $c->_comp_prefixes( $name, qw/View V/ ),
@args )
if $name;
if (ref $c) {
return $c->stash->{current_view_instance}
if $c->stash->{current_view_instance};
return $c->view( $c->stash->{current_view} )
if $c->stash->{current_view};
}
return $c->view( $c->config->{default_view} )
if $c->config->{default_view};
return $c->_filter_component( $c->_comp_singular(qw/View V/) );
}
=head2 $c->models
Returns the available names which can be passed to $c->model
=cut
sub models {
my ( $c ) = @_;
return $c->_comp_names(qw/Model M/);
}
=head2 $c->views
Returns the available names which can be passed to $c->view
=cut
sub views {
my ( $c ) = @_;
return $c->_comp_names(qw/View V/);
}
=head2 $c->comp($name)
=head2 $c->component($name)
Gets a component object by name. This method is not recommended,
unless you want to get a specific component by full
class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
should be used instead.
=cut
sub component {
my $c = shift;
if (@_) {
my $name = shift;
my $appclass = ref $c || $c;
my @names = (
$name, "${appclass}::${name}",
map { "${appclass}::${_}::${name}" }
qw/Model M Controller C View V/
);
my $comp = $c->_comp_explicit(@names);
return $c->_filter_component( $comp, @_ ) if defined($comp);
$comp = $c->_comp_search($name);
return $c->_filter_component( $comp, @_ ) if defined($comp);
}
return sort keys %{ $c->components };
}
=head2 CLASS DATA AND HELPER CLASSES
=head2 $c->config
Returns or takes a hashref containing the application's configuration.
__PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
You can also use a C<YAML>, C<XML> or C<Config::General> config file
like myapp.yml in your applications home directory. See
L<Catalyst::Plugin::ConfigLoader>.
---
db: dsn:SQLite:foo.db
=cut
sub config {
my $c = shift;
$c->log->warn("Setting config after setup has been run is not a good idea.")
if ( @_ and $c->setup_finished );
$c->NEXT::config(@_);
}
=head2 $c->log
Returns the logging object instance. Unless it is already set, Catalyst
sets this up with a L<Catalyst::Log> object. To use your own log class,
set the logger with the C<< __PACKAGE__->log >> method prior to calling
C<< __PACKAGE__->setup >>.
__PACKAGE__->log( MyLogger->new );
__PACKAGE__->setup;
And later:
$c->log->info( 'Now logging with my own logger!' );
Your log class should implement the methods described in
L<Catalyst::Log>.
=head2 $c->debug
Overload to enable debug messages (same as -Debug option).
Note that this is a static method, not an accessor and should be overloaded
by declaring "sub debug { 1 }" in your MyApp.pm, not by calling $c->debug(1).
=cut
sub debug { 0 }
=head2 $c->dispatcher
Returns the dispatcher instance. Stringifies to class name. See
L<Catalyst::Dispatcher>.
=head2 $c->engine
Returns the engine instance. Stringifies to the class name. See
L<Catalyst::Engine>.
=head2 UTILITY METHODS
=head2 $c->path_to(@path)
Merges C<@path> with C<< $c->config->{home} >> and returns a
L<Path::Class::Dir> object.
For example:
$c->path_to( 'db', 'sqlite.db' );
=cut
sub path_to {
my ( $c, @path ) = @_;
my $path = Path::Class::Dir->new( $c->config->{home}, @path );
if ( -d $path ) { return $path }
else { return Path::Class::File->new( $c->config->{home}, @path ) }
}
=head2 $c->plugin( $name, $class, @args )
Helper method for plugins. It creates a classdata accessor/mutator and
loads and instantiates the given class.
MyApp->plugin( 'prototype', 'HTML::Prototype' );
$c->prototype->define_javascript_functions;
=cut
sub plugin {
my ( $class, $name, $plugin, @args ) = @_;
$class->_register_plugin( $plugin, 1 );
eval { $plugin->import };
$class->mk_classdata($name);
my $obj;
eval { $obj = $plugin->new(@args) };
if ($@) {
Catalyst::Exception->throw( message =>
qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
}
$class->$name($obj);
$class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
if $class->debug;
}
=head2 MyApp->setup
Initializes the dispatcher and engine, loads any plugins, and loads the
model, view, and controller components. You may also specify an array
of plugins to load here, if you choose to not load them in the C<use
Catalyst> line.
MyApp->setup;
MyApp->setup( qw/-Debug/ );
=cut
sub setup {
my ( $class, @arguments ) = @_;
$class->log->warn("Running setup twice is not a good idea.")
if ( $class->setup_finished );
unless ( $class->isa('Catalyst') ) {
Catalyst::Exception->throw(
message => qq/'$class' does not inherit from Catalyst/ );
}
if ( $class->arguments ) {
@arguments = ( @arguments, @{ $class->arguments } );
}
# Process options
my $flags = {};
foreach (@arguments) {
if (/^-Debug$/) {
$flags->{log} =
( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
}
elsif (/^-(\w+)=?(.*)$/) {
$flags->{ lc $1 } = $2;
}
else {
push @{ $flags->{plugins} }, $_;
}
}
$class->setup_home( delete $flags->{home} );
$class->setup_log( delete $flags->{log} );
$class->setup_plugins( delete $flags->{plugins} );
$class->setup_dispatcher( delete $flags->{dispatcher} );
$class->setup_engine( delete $flags->{engine} );
$class->setup_stats( delete $flags->{stats} );
for my $flag ( sort keys %{$flags} ) {
if ( my $code = $class->can( 'setup_' . $flag ) ) {
&$code( $class, delete $flags->{$flag} );
}
else {
$class->log->warn(qq/Unknown flag "$flag"/);
}
}
eval { require Catalyst::Devel; };
if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
$class->log->warn(<<"EOF");
You are running an old script!
Please update by running (this will overwrite existing files):
catalyst.pl -force -scripts $class
or (this will not overwrite existing files):
catalyst.pl -scripts $class
EOF
}
if ( $class->debug ) {
my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
if (@plugins) {
my $t = Text::SimpleTable->new(74);
$t->row($_) for @plugins;
$class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
}
my $dispatcher = $class->dispatcher;
my $engine = $class->engine;
my $home = $class->config->{home};
$class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
$class->log->debug(qq/Loaded engine "$engine"/);
$home
? ( -d $home )
? $class->log->debug(qq/Found home "$home"/)
: $class->log->debug(qq/Home "$home" doesn't exist/)
: $class->log->debug(q/Couldn't find home/);
}
# Call plugins setup
{
no warnings qw/redefine/;
local *setup = sub { };
$class->setup;
}
# Initialize our data structure
$class->components( {} );
$class->setup_components;
if ( $class->debug ) {
my $t = Text::SimpleTable->new( [ 63, 'Class' ], [ 8, 'Type' ] );
for my $comp ( sort keys %{ $class->components } ) {
my $type = ref $class->components->{$comp} ? 'instance' : 'class';
$t->row( $comp, $type );
}
$class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
if ( keys %{ $class->components } );
}
# Add our self to components, since we are also a component
$class->components->{$class} = $class;
$class->setup_actions;
if ( $class->debug ) {
my $name = $class->config->{name} || 'Application';
$class->log->info("$name powered by Catalyst $Catalyst::VERSION");
}
$class->log->_flush() if $class->log->can('_flush');
$class->setup_finished(1);
}
=head2 $c->uri_for( $path, @args?, \%query_values? )
Merges path with C<< $c->request->base >> for absolute URIs and with
C<< $c->namespace >> for relative URIs, then returns a normalized L<URI>
object. If any args are passed, they are added at the end of the path.
If the last argument to C<uri_for> is a hash reference, it is assumed to
contain GET parameter key/value pairs, which will be appended to the URI
in standard fashion.
Note that uri_for is destructive to the passed hashref. Subsequent calls
with the same hashref may have unintended results.
Instead of C<$path>, you can also optionally pass a C<$action> object
which will be resolved to a path using
C<< $c->dispatcher->uri_for_action >>; if the first element of
C<@args> is an arrayref it is treated as a list of captures to be passed
to C<uri_for_action>.
=cut
sub uri_for {
my ( $c, $path, @args ) = @_;
if ( Scalar::Util::blessed($path) ) { # action object
my $captures = ( scalar @args && ref $args[0] eq 'ARRAY'
? shift(@args)
: [] );
$path = $c->dispatcher->uri_for_action($path, $captures);
return undef unless defined($path);
$path = '/' if $path eq '';
}
undef($path) if (defined $path && $path eq '');
my $params =
( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
unshift(@args, $path);
unless (defined $path && $path =~ s!^/!!) { # in-place strip
my $namespace = $c->namespace;
if (defined $path) { # cheesy hack to handle path '../foo'
$namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
}
unshift(@args, $namespace || '');
}
# join args with '/', or a blank string
my $args = join('/', grep { defined($_) } @args);
$args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
$args =~ s!^/!!;
my $base = $c->req->base;
my $class = ref($base);
$base =~ s{(?<!/)$}{/};
my $query = '';
if (my @keys = keys %$params) {
# somewhat lifted from URI::_query's query_form
$query = '?'.join('&', map {
my $val = $params->{$_};
s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
s/ /+/g;
my $key = $_;
$val = '' unless defined $val;
(map {
$_ = "$_";
utf8::encode( $_ ) if utf8::is_utf8($_);
# using the URI::Escape pattern here so utf8 chars survive
s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
s/ /+/g;
"${key}=$_"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
} @keys);
}
my $res = bless(\"${base}${args}${query}", $class);
$res;
}
=head2 $c->welcome_message
Returns the Catalyst welcome HTML page.
=cut
sub welcome_message {
my $c = shift;
my $name = $c->config->{name};
my $logo = $c->uri_for('/static/images/catalyst_logo.png');
my $prefix = Catalyst::Utils::appprefix( ref $c );
$c->response->content_type('text/html; charset=utf-8');
return <<"EOF";
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Language" content="en" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>$name on Catalyst $VERSION</title>
<style type="text/css">
body {
color: #000;
background-color: #eee;
}
div#content {
width: 640px;
margin-left: auto;
margin-right: auto;
margin-top: 10px;
margin-bottom: 10px;
text-align: left;
background-color: #ccc;
border: 1px solid #aaa;
}
p, h1, h2 {
margin-left: 20px;
margin-right: 20px;
font-family: verdana, tahoma, sans-serif;
}
a {
font-family: verdana, tahoma, sans-serif;
}
:link, :visited {
text-decoration: none;
color: #b00;
border-bottom: 1px dotted #bbb;
}
:link:hover, :visited:hover {
color: #555;
}
div#topbar {
margin: 0px;
}
pre {
margin: 10px;
padding: 8px;
}
div#answers {
padding: 8px;
margin: 10px;
background-color: #fff;
border: 1px solid #aaa;
}
h1 {
font-size: 0.9em;
font-weight: normal;
text-align: center;
}
h2 {
font-size: 1.0em;
}
p {
font-size: 0.9em;
}
p img {
float: right;
margin-left: 10px;
}
span#appname {
font-weight: bold;
font-size: 1.6em;
}
</style>
</head>
<body>
<div id="content">
<div id="topbar">
<h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
$VERSION</h1>
</div>
<div id="answers">
<p>
<img src="$logo" alt="Catalyst Logo" />
</p>
<p>Welcome to the world of Catalyst.
This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
framework will make web development something you had
never expected it to be: Fun, rewarding, and quick.</p>
<h2>What to do now?</h2>
<p>That really depends on what <b>you</b> want to do.
We do, however, provide you with a few starting points.</p>
<p>If you want to jump right into web development with Catalyst
you might want to start with a tutorial.</p>
<pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
</pre>
<p>Afterwards you can go on to check out a more complete look at our features.</p>
<pre>
<code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
<!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
</code></pre>
<h2>What to do next?</h2>
<p>Next it's time to write an actual application. Use the
helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
<a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
<a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
they can save you a lot of work.</p>
<pre><code>script/${prefix}_create.pl -help</code></pre>
<p>Also, be sure to check out the vast and growing
collection of <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3APlugin%3A%3A&mode=all">plugins for Catalyst on CPAN</a>;
you are likely to find what you need there.
</p>
<h2>Need help?</h2>
<p>Catalyst has a very active community. Here are the main places to
get in touch with us.</p>
<ul>
<li>
<a href="http://dev.catalyst.perl.org">Wiki</a>
</li>
<li>
<a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
</li>
<li>
<a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
</li>
</ul>
<h2>In conclusion</h2>
<p>The Catalyst team hopes you will enjoy using Catalyst as much
as we enjoyed making it. Please contact us if you have ideas
for improvement or other feedback.</p>
</div>
</div>
</body>
</html>
EOF
}
=head1 INTERNAL METHODS
These methods are not meant to be used by end users.
=head2 $c->components
Returns a hash of components.
=head2 $c->context_class
Returns or sets the context class.
=head2 $c->counter
Returns a hashref containing coderefs and execution counts (needed for
deep recursion detection).
=head2 $c->depth
Returns the number of actions on the current internal execution stack.
=head2 $c->dispatch
Dispatches a request to actions.
=cut
sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
=head2 $c->dispatcher_class
Returns or sets the dispatcher class.
=head2 $c->dump_these
Returns a list of 2-element array references (name, structure) pairs
that will be dumped on the error page in debug mode.
=cut
sub dump_these {
my $c = shift;
[ Request => $c->req ],
[ Response => $c->res ],
[ Stash => $c->stash ],
[ Config => $c->config ];
}
=head2 $c->engine_class
Returns or sets the engine class.
=head2 $c->execute( $class, $coderef )
Execute a coderef in given class and catch exceptions. Errors are available
via $c->error.
=cut
sub execute {
my ( $c, $class, $code ) = @_;
$class = $c->component($class) || $class;
$c->state(0);
if ( $c->depth >= $RECURSION ) {
my $action = "$code";
$action = "/$action" unless $action =~ /->/;
my $error = qq/Deep recursion detected calling "$action"/;
$c->log->error($error);
$c->error($error);
$c->state(0);
return $c->state;
}
my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
push( @{ $c->stack }, $code );
eval { $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 ) };
$c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
my $last = pop( @{ $c->stack } );
if ( my $error = $@ ) {
if ( !ref($error) and $error eq $DETACH ) { die $DETACH if $c->depth > 1 }
else {
unless ( ref $error ) {
no warnings 'uninitialized';
chomp $error;
my $class = $last->class;
my $name = $last->name;
$error = qq/Caught exception in $class->$name "$error"/;
}
$c->error($error);
$c->state(0);
}
}
return $c->state;
}
sub _stats_start_execute {
my ( $c, $code ) = @_;
return if ( ( $code->name =~ /^_.*/ )
&& ( !$c->config->{show_internal_actions} ) );
$c->counter->{"$code"}++;
my $action = "$code";
$action = "/$action" unless $action =~ /->/;
# determine if the call was the result of a forward
# this is done by walking up the call stack and looking for a calling
# sub of Catalyst::forward before the eval
my $callsub = q{};
for my $index ( 2 .. 11 ) {
last
if ( ( caller($index) )[0] eq 'Catalyst'
&& ( caller($index) )[3] eq '(eval)' );
if ( ( caller($index) )[3] =~ /forward$/ ) {
$callsub = ( caller($index) )[3];
$action = "-> $action";
last;
}
}
my $uid = "$code" . $c->counter->{"$code"};
# is this a root-level call or a forwarded call?
if ( $callsub =~ /forward$/ ) {
# forward, locate the caller
if ( my $parent = $c->stack->[-1] ) {
$c->stats->profile(
begin => $action,
parent => "$parent" . $c->counter->{"$parent"},
uid => $uid,
);
}
else {
# forward with no caller may come from a plugin
$c->stats->profile(
begin => $action,
uid => $uid,
);
}
}
else {
# root-level call
$c->stats->profile(
begin => $action,
uid => $uid,
);
}
return $action;
}
sub _stats_finish_execute {
my ( $c, $info ) = @_;
$c->stats->profile( end => $info );
}
=head2 $c->_localize_fields( sub { }, \%keys );
=cut
sub _localize_fields {
my ( $c, $localized, $code ) = ( @_ );
my $request = delete $localized->{request} || {};
my $response = delete $localized->{response} || {};
local @{ $c }{ keys %$localized } = values %$localized;
local @{ $c->request }{ keys %$request } = values %$request;
local @{ $c->response }{ keys %$response } = values %$response;
$code->();
}
=head2 $c->finalize
Finalizes the request.
=cut
sub finalize {
my $c = shift;
for my $error ( @{ $c->error } ) {
$c->log->error($error);
}
# Allow engine to handle finalize flow (for POE)
if ( $c->engine->can('finalize') ) {
$c->engine->finalize($c);
}
else {
$c->finalize_uploads;
# Error
if ( $#{ $c->error } >= 0 ) {
$c->finalize_error;
}
$c->finalize_headers;
# HEAD request
if ( $c->request->method eq 'HEAD' ) {
$c->response->body('');
}
$c->finalize_body;
}
if ($c->use_stats) {
my $elapsed = sprintf '%f', $c->stats->elapsed;
my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
$c->log->info(
"Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
}
return $c->response->status;
}
=head2 $c->finalize_body
Finalizes body.
=cut
sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
=head2 $c->finalize_cookies
Finalizes cookies.
=cut
sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
=head2 $c->finalize_error
Finalizes error.
=cut
sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
=head2 $c->finalize_headers
Finalizes headers.
=cut
sub finalize_headers {
my $c = shift;
# Check if we already finalized headers
return if $c->response->{_finalized_headers};
# Handle redirects
if ( my $location = $c->response->redirect ) {
$c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
$c->response->header( Location => $location );
if ( !$c->response->body ) {
# Add a default body if none is already present
$c->response->body(
qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
);
}
}
# Content-Length
if ( $c->response->body && !$c->response->content_length ) {
# get the length from a filehandle
if ( blessed( $c->response->body ) && $c->response->body->can('read') )
{
my $stat = stat $c->response->body;
if ( $stat && $stat->size > 0 ) {
$c->response->content_length( $stat->size );
}
else {
$c->log->warn('Serving filehandle without a content-length');
}
}
else {
# everything should be bytes at this point, but just in case
$c->response->content_length( bytes::length( $c->response->body ) );
}
}
# Errors
if ( $c->response->status =~ /^(1\d\d|[23]04)$/ ) {
$c->response->headers->remove_header("Content-Length");
$c->response->body('');
}
$c->finalize_cookies;
$c->engine->finalize_headers( $c, @_ );
# Done
$c->response->{_finalized_headers} = 1;
}
=head2 $c->finalize_output
An alias for finalize_body.
=head2 $c->finalize_read
Finalizes the input after reading is complete.
=cut
sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
=head2 $c->finalize_uploads
Finalizes uploads. Cleans up any temporary files.
=cut
sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
=head2 $c->get_action( $action, $namespace )
Gets an action in a given namespace.
=cut
sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
=head2 $c->get_actions( $action, $namespace )
Gets all actions of a given name in a namespace and all parent
namespaces.
=cut
sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
=head2 $c->handle_request( $class, @arguments )
Called to handle each HTTP request.
=cut
sub handle_request {
my ( $class, @arguments ) = @_;
# Always expect worst case!
my $status = -1;
eval {
if ($class->debug) {
my $secs = time - $START || 1;
my $av = sprintf '%.3f', $COUNT / $secs;
my $time = localtime time;
$class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
}
my $c = $class->prepare(@arguments);
$c->dispatch;
$status = $c->finalize;
};
if ( my $error = $@ ) {
chomp $error;
$class->log->error(qq/Caught exception in engine "$error"/);
}
$COUNT++;
$class->log->_flush() if $class->log->can('_flush');
return $status;
}
=head2 $c->prepare( @arguments )
Creates a Catalyst context from an engine-specific request (Apache, CGI,
etc.).
=cut
sub prepare {
my ( $class, @arguments ) = @_;
$class->context_class( ref $class || $class ) unless $class->context_class;
my $c = $class->context_class->new(
{
counter => {},
stack => [],
request => $class->request_class->new(
{
arguments => [],
body_parameters => {},
cookies => {},
headers => HTTP::Headers->new,
parameters => {},
query_parameters => {},
secure => 0,
captures => [],
uploads => {}
}
),
response => $class->response_class->new(
{
body => '',
cookies => {},
headers => HTTP::Headers->new(),
status => 200
}
),
stash => {},
state => 0
}
);
$c->stats($class->stats_class->new)->enable($c->use_stats);
if ( $c->debug ) {
$c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
}
# For on-demand data
$c->request->{_context} = $c;
$c->response->{_context} = $c;
weaken( $c->request->{_context} );
weaken( $c->response->{_context} );
# Allow engine to direct the prepare flow (for POE)
if ( $c->engine->can('prepare') ) {
$c->engine->prepare( $c, @arguments );
}
else {
$c->prepare_request(@arguments);
$c->prepare_connection;
$c->prepare_query_parameters;
$c->prepare_headers;
$c->prepare_cookies;
$c->prepare_path;
# Prepare the body for reading, either by prepare_body
# or the user, if they are using $c->read
$c->prepare_read;
# Parse the body unless the user wants it on-demand
unless ( $c->config->{parse_on_demand} ) {
$c->prepare_body;
}
}
my $method = $c->req->method || '';
my $path = $c->req->path;
$path = '/' unless length $path;
my $address = $c->req->address || '';
$c->log->debug(qq/"$method" request for "$path" from "$address"/)
if $c->debug;
$c->prepare_action;
return $c;
}
=head2 $c->prepare_action
Prepares action. See L<Catalyst::Dispatcher>.
=cut
sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
=head2 $c->prepare_body
Prepares message body.
=cut
sub prepare_body {
my $c = shift;
# Do we run for the first time?
return if defined $c->request->{_body};
# Initialize on-demand data
$c->engine->prepare_body( $c, @_ );
$c->prepare_parameters;
$c->prepare_uploads;
if ( $c->debug && keys %{ $c->req->body_parameters } ) {
my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
for my $key ( sort keys %{ $c->req->body_parameters } ) {
my $param = $c->req->body_parameters->{$key};
my $value = defined($param) ? $param : '';
$t->row( $key,
ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
}
$c->log->debug( "Body Parameters are:\n" . $t->draw );
}
}
=head2 $c->prepare_body_chunk( $chunk )
Prepares a chunk of data before sending it to L<HTTP::Body>.
See L<Catalyst::Engine>.
=cut
sub prepare_body_chunk {
my $c = shift;
$c->engine->prepare_body_chunk( $c, @_ );
}
=head2 $c->prepare_body_parameters
Prepares body parameters.
=cut
sub prepare_body_parameters {
my $c = shift;
$c->engine->prepare_body_parameters( $c, @_ );
}
=head2 $c->prepare_connection
Prepares connection.
=cut
sub prepare_connection {
my $c = shift;
$c->engine->prepare_connection( $c, @_ );
}
=head2 $c->prepare_cookies
Prepares cookies.
=cut
sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
=head2 $c->prepare_headers
Prepares headers.
=cut
sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
=head2 $c->prepare_parameters
Prepares parameters.
=cut
sub prepare_parameters {
my $c = shift;
$c->prepare_body_parameters;
$c->engine->prepare_parameters( $c, @_ );
}
=head2 $c->prepare_path
Prepares path and base.
=cut
sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
=head2 $c->prepare_query_parameters
Prepares query parameters.
=cut
sub prepare_query_parameters {
my $c = shift;
$c->engine->prepare_query_parameters( $c, @_ );
if ( $c->debug && keys %{ $c->request->query_parameters } ) {
my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
for my $key ( sort keys %{ $c->req->query_parameters } ) {
my $param = $c->req->query_parameters->{$key};
my $value = defined($param) ? $param : '';
$t->row( $key,
ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
}
$c->log->debug( "Query Parameters are:\n" . $t->draw );
}
}
=head2 $c->prepare_read
Prepares the input for reading.
=cut
sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
=head2 $c->prepare_request
Prepares the engine request.
=cut
sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
=head2 $c->prepare_uploads
Prepares uploads.
=cut
sub prepare_uploads {
my $c = shift;
$c->engine->prepare_uploads( $c, @_ );
if ( $c->debug && keys %{ $c->request->uploads } ) {
my $t = Text::SimpleTable->new(
[ 12, 'Parameter' ],
[ 26, 'Filename' ],
[ 18, 'Type' ],
[ 9, 'Size' ]
);
for my $key ( sort keys %{ $c->request->uploads } ) {
my $upload = $c->request->uploads->{$key};
for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
$t->row( $key, $u->filename, $u->type, $u->size );
}
}
$c->log->debug( "File Uploads are:\n" . $t->draw );
}
}
=head2 $c->prepare_write
Prepares the output for writing.
=cut
sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
=head2 $c->request_class
Returns or sets the request class.
=head2 $c->response_class
Returns or sets the response class.
=head2 $c->read( [$maxlength] )
Reads a chunk of data from the request body. This method is designed to
be used in a while loop, reading C<$maxlength> bytes on every call.
C<$maxlength> defaults to the size of the request if not specified.
You have to set C<< MyApp->config->{parse_on_demand} >> to use this
directly.
Warning: If you use read(), Catalyst will not process the body,
so you will not be able to access POST parameters or file uploads via
$c->request. You must handle all body parsing yourself.
=cut
sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
=head2 $c->run
Starts the engine.
=cut
sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
=head2 $c->set_action( $action, $code, $namespace, $attrs )
Sets an action in a given namespace.
=cut
sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
=head2 $c->setup_actions($component)
Sets up actions for a component.
=cut
sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
=head2 $c->setup_components
Sets up components. Specify a C<setup_components> config option to pass
additional options directly to L<Module::Pluggable>. To add additional
search paths, specify a key named C<search_extra> as an array
reference. Items in the array beginning with C<::> will have the
application class name prepended to them.
=cut
sub setup_components {
my $class = shift;
my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
my $config = $class->config->{ setup_components };
my $extra = delete $config->{ search_extra } || [];
push @paths, @$extra;
my $locator = Module::Pluggable::Object->new(
search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
%$config
);
my @comps = sort { length $a <=> length $b } $locator->plugins;
my %comps = map { $_ => 1 } @comps;
for my $component ( @comps ) {
# We pass ignore_loaded here so that overlay files for (e.g.)
# Model::DBI::Schema sub-classes are loaded - if it's in @comps
# we know M::P::O found a file on disk so this is safe
Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
my $module = $class->setup_component( $component );
my %modules = (
$component => $module,
map {
$_ => $class->setup_component( $_ )
} grep {
not exists $comps{$_}
} Devel::InnerPackage::list_packages( $component )
);
for my $key ( keys %modules ) {
$class->components->{ $key } = $modules{ $key };
}
}
}
=head2 $c->setup_component
=cut
sub setup_component {
my( $class, $component ) = @_;
unless ( $component->can( 'COMPONENT' ) ) {
return $component;
}
my $suffix = Catalyst::Utils::class2classsuffix( $component );
my $config = $class->config->{ $suffix } || {};
my $instance = eval { $component->COMPONENT( $class, $config ); };
if ( my $error = $@ ) {
chomp $error;
Catalyst::Exception->throw(
message => qq/Couldn't instantiate component "$component", "$error"/
);
}
Catalyst::Exception->throw(
message =>
qq/Couldn't instantiate component "$component", "COMPONENT() didn't return an object-like value"/
) unless eval { $instance->can( 'can' ) };
return $instance;
}
=head2 $c->setup_dispatcher
Sets up dispatcher.
=cut
sub setup_dispatcher {
my ( $class, $dispatcher ) = @_;
if ($dispatcher) {
$dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
}
if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
$dispatcher = 'Catalyst::Dispatcher::' . $env;
}
unless ($dispatcher) {
$dispatcher = $class->dispatcher_class;
}
unless (Class::Inspector->loaded($dispatcher)) {
require Class::Inspector->filename($dispatcher);
}
# dispatcher instance
$class->dispatcher( $dispatcher->new );
}
=head2 $c->setup_engine
Sets up engine.
=cut
sub setup_engine {
my ( $class, $engine ) = @_;
if ($engine) {
$engine = 'Catalyst::Engine::' . $engine;
}
if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
$engine = 'Catalyst::Engine::' . $env;
}
if ( $ENV{MOD_PERL} ) {
# create the apache method
{
no strict 'refs';
*{"$class\::apache"} = sub { shift->engine->apache };
}
my ( $software, $version ) =
$ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
$version =~ s/_//g;
$version =~ s/(\.[^.]+)\./$1/g;
if ( $software eq 'mod_perl' ) {
if ( !$engine ) {
if ( $version >= 1.99922 ) {
$engine = 'Catalyst::Engine::Apache2::MP20';
}
elsif ( $version >= 1.9901 ) {
$engine = 'Catalyst::Engine::Apache2::MP19';
}
elsif ( $version >= 1.24 ) {
$engine = 'Catalyst::Engine::Apache::MP13';
}
else {
Catalyst::Exception->throw( message =>
qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
}
}
# install the correct mod_perl handler
if ( $version >= 1.9901 ) {
*handler = sub : method {
shift->handle_request(@_);
};
}
else {
*handler = sub ($$) { shift->handle_request(@_) };
}
}
elsif ( $software eq 'Zeus-Perl' ) {
$engine = 'Catalyst::Engine::Zeus';
}
else {
Catalyst::Exception->throw(
message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
}
}
unless ($engine) {
$engine = $class->engine_class;
}
unless (Class::Inspector->loaded($engine)) {
require Class::Inspector->filename($engine);
}
# check for old engines that are no longer compatible
my $old_engine;
if ( $engine->isa('Catalyst::Engine::Apache')
&& !Catalyst::Engine::Apache->VERSION )
{
$old_engine = 1;
}
elsif ( $engine->isa('Catalyst::Engine::Server::Base')
&& Catalyst::Engine::Server->VERSION le '0.02' )
{
$old_engine = 1;
}
elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
&& $engine->VERSION eq '0.01' )
{
$old_engine = 1;
}
elsif ($engine->isa('Catalyst::Engine::Zeus')
&& $engine->VERSION eq '0.01' )
{
$old_engine = 1;
}
if ($old_engine) {
Catalyst::Exception->throw( message =>
qq/Engine "$engine" is not supported by this version of Catalyst/
);
}
# engine instance
$class->engine( $engine->new );
}
=head2 $c->setup_home
Sets up the home directory.
=cut
sub setup_home {
my ( $class, $home ) = @_;
if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
$home = $env;
}
unless ($home) {
$home = Catalyst::Utils::home($class);
}
if ($home) {
$class->config->{home} ||= $home;
$class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
}
}
=head2 $c->setup_log
Sets up log.
=cut
sub setup_log {
my ( $class, $debug ) = @_;
unless ( $class->log ) {
$class->log( Catalyst::Log->new );
}
my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
if ( defined($env_debug) ? $env_debug : $debug ) {
no strict 'refs';
*{"$class\::debug"} = sub { 1 };
$class->log->debug('Debug messages enabled');
}
}
=head2 $c->setup_plugins
Sets up plugins.
=cut
=head2 $c->setup_stats
Sets up timing statistics class.
=cut
sub setup_stats {
my ( $class, $stats ) = @_;
Catalyst::Utils::ensure_class_loaded($class->stats_class);
my $env = Catalyst::Utils::env_value( $class, 'STATS' );
if ( defined($env) ? $env : ($stats || $class->debug ) ) {
no strict 'refs';
*{"$class\::use_stats"} = sub { 1 };
$class->log->debug('Statistics enabled');
}
}
=head2 $c->registered_plugins
Returns a sorted list of the plugins which have either been stated in the
import list or which have been added via C<< MyApp->plugin(@args); >>.
If passed a given plugin name, it will report a boolean value indicating
whether or not that plugin is loaded. A fully qualified name is required if
the plugin name does not begin with C<Catalyst::Plugin::>.
if ($c->registered_plugins('Some::Plugin')) {
...
}
=cut
{
sub registered_plugins {
my $proto = shift;
return sort keys %{ $proto->_plugins } unless @_;
my $plugin = shift;
return 1 if exists $proto->_plugins->{$plugin};
return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
}
sub _register_plugin {
my ( $proto, $plugin, $instant ) = @_;
my $class = ref $proto || $proto;
# no ignore_loaded here, the plugin may already have been
# defined in memory and we don't want to error on "no file" if so
Catalyst::Utils::ensure_class_loaded( $plugin );
$proto->_plugins->{$plugin} = 1;
unless ($instant) {
no strict 'refs';
unshift @{"$class\::ISA"}, $plugin;
}
return $class;
}
sub setup_plugins {
my ( $class, $plugins ) = @_;
$class->_plugins( {} ) unless $class->_plugins;
$plugins ||= [];
for my $plugin ( reverse @$plugins ) {
unless ( $plugin =~ s/\A\+// ) {
$plugin = "Catalyst::Plugin::$plugin";
}
$class->_register_plugin($plugin);
}
}
}
=head2 $c->stack
Returns an arrayref of the internal execution stack (actions that are
currently executing).
=head2 $c->stats_class
Returns or sets the stats (timing statistics) class.
=head2 $c->use_stats
Returns 1 when stats collection is enabled. Stats collection is enabled
when the -Stats options is set, debug is on or when the <MYAPP>_STATS
environment variable is set.
Note that this is a static method, not an accessor and should be overloaded
by declaring "sub use_stats { 1 }" in your MyApp.pm, not by calling $c->use_stats(1).
=cut
sub use_stats { 0 }
=head2 $c->write( $data )
Writes $data to the output stream. When using this method directly, you
will need to manually set the C<Content-Length> header to the length of
your output data, if known.
=cut
sub write {
my $c = shift;
# Finalize headers if someone manually writes output
$c->finalize_headers;
return $c->engine->write( $c, @_ );
}
=head2 version
Returns the Catalyst version number. Mostly useful for "powered by"
messages in template systems.
=cut
sub version { return $Catalyst::VERSION }
=head1 INTERNAL ACTIONS
Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
C<_ACTION>, and C<_END>. These are by default not shown in the private
action table, but you can make them visible with a config parameter.
MyApp->config->{show_internal_actions} = 1;
=head1 CASE SENSITIVITY
By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> is
mapped to C</foo/bar>. You can activate case sensitivity with a config
parameter.
MyApp->config->{case_sensitive} = 1;
This causes C<MyApp::C::Foo::Bar> to map to C</Foo/Bar>.
=head1 ON-DEMAND PARSER
The request body is usually parsed at the beginning of a request,
but if you want to handle input yourself, you can enable on-demand
parsing with a config parameter.
MyApp->config->{parse_on_demand} = 1;
=head1 PROXY SUPPORT
Many production servers operate using the common double-server approach,
with a lightweight frontend web server passing requests to a larger
backend server. An application running on the backend server must deal
with two problems: the remote user always appears to be C<127.0.0.1> and
the server's hostname will appear to be C<localhost> regardless of the
virtual host that the user connected through.
Catalyst will automatically detect this situation when you are running
the frontend and backend servers on the same machine. The following
changes are made to the request.
$c->req->address is set to the user's real IP address, as read from
the HTTP X-Forwarded-For header.
The host value for $c->req->base and $c->req->uri is set to the real
host, as read from the HTTP X-Forwarded-Host header.
Obviously, your web server must support these headers for this to work.
In a more complex server farm environment where you may have your
frontend proxy server(s) on different machines, you will need to set a
configuration option to tell Catalyst to read the proxied data from the
headers.
MyApp->config->{using_frontend_proxy} = 1;
If you do not wish to use the proxy support at all, you may set:
MyApp->config->{ignore_frontend_proxy} = 1;
=head1 THREAD SAFETY
Catalyst has been tested under Apache 2's threading C<mpm_worker>,
C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
believe the Catalyst core to be thread-safe.
If you plan to operate in a threaded environment, remember that all other
modules you are using must also be thread-safe. Some modules, most notably
L<DBD::SQLite>, are not thread-safe.
=head1 SUPPORT
IRC:
Join #catalyst on irc.perl.org.
Mailing Lists:
http://lists.rawmode.org/mailman/listinfo/catalyst
http://lists.rawmode.org/mailman/listinfo/catalyst-dev
Web:
http://catalyst.perl.org
Wiki:
http://dev.catalyst.perl.org
=head1 SEE ALSO
=head2 L<Task::Catalyst> - All you need to start with Catalyst
=head2 L<Catalyst::Manual> - The Catalyst Manual
=head2 L<Catalyst::Component>, L<Catalyst::Base> - Base classes for components
=head2 L<Catalyst::Engine> - Core engine
=head2 L<Catalyst::Log> - Log class.
=head2 L<Catalyst::Request> - Request object
=head2 L<Catalyst::Response> - Response object
=head2 L<Catalyst::Test> - The test suite.
=head1 CREDITS
Andy Grundman
Andy Wardley
Andreas Marienborg
Andrew Bramble
Andrew Ford
Andrew Ruthven
Arthur Bergman
Autrijus Tang
Brian Cassidy
Carl Franks
Christian Hansen
Christopher Hicks
Dan Sully
Danijel Milicevic
David Kamholz
David Naughton
Drew Taylor
Gary Ashton Jones
Geoff Richards
Jesse Sheidlower
Jesse Vincent
Jody Belka
Johan Lindstrom
Juan Camacho
Leon Brocard
Marcus Ramberg
Matt S Trout
Robert Sedlacek
Sam Vilain
Sascha Kiefer
Sebastian Willert
Tatsuhiko Miyagawa
Ulf Edvinsson
Yuval Kogman
=head1 AUTHOR
Sebastian Riedel, C<sri@oook.de>
=head1 LICENSE
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;