4 use Moose::Meta::Class ();
5 extends 'Catalyst::Component';
6 use Moose::Util qw/find_meta/;
7 use B::Hooks::EndOfScope ();
8 use Catalyst::Exception;
9 use Catalyst::Exception::Detach;
10 use Catalyst::Exception::Go;
12 use Catalyst::Request;
13 use Catalyst::Request::Upload;
14 use Catalyst::Response;
16 use Catalyst::Controller;
18 use Devel::InnerPackage ();
20 use Module::Pluggable::Object ();
21 use Text::SimpleTable ();
22 use Path::Class::Dir ();
23 use Path::Class::File ();
27 use Tree::Simple qw/use_weak_refs/;
28 use Tree::Simple::Visitor::FindByUID;
29 use Class::C3::Adopt::NEXT;
30 use List::MoreUtils qw/uniq/;
33 use Carp qw/croak carp shortmess/;
35 BEGIN { require 5.008004; }
37 has stack => (is => 'ro', default => sub { [] });
38 has stash => (is => 'rw', default => sub { {} });
39 has state => (is => 'rw', default => 0);
40 has stats => (is => 'rw');
41 has action => (is => 'rw');
42 has counter => (is => 'rw', default => sub { {} });
43 has request => (is => 'rw', default => sub { $_[0]->request_class->new({}) }, required => 1, lazy => 1);
44 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
45 has namespace => (is => 'rw');
47 sub depth { scalar @{ shift->stack || [] }; }
48 sub comp { shift->component(@_) }
51 my $self = shift; return $self->request(@_);
54 my $self = shift; return $self->response(@_);
57 # For backwards compatibility
58 sub finalize_output { shift->finalize_body(@_) };
63 our $RECURSION = 1000;
64 our $DETACH = Catalyst::Exception::Detach->new;
65 our $GO = Catalyst::Exception::Go->new;
67 #I imagine that very few of these really need to be class variables. if any.
68 #maybe we should just make them attributes with a default?
69 __PACKAGE__->mk_classdata($_)
70 for qw/container components arguments dispatcher engine log dispatcher_class
71 engine_class context_class request_class response_class stats_class
74 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
75 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
76 __PACKAGE__->request_class('Catalyst::Request');
77 __PACKAGE__->response_class('Catalyst::Response');
78 __PACKAGE__->stats_class('Catalyst::Stats');
80 # Remember to update this in Catalyst::Runtime as well!
82 our $VERSION = '5.80032';
85 my ( $class, @arguments ) = @_;
87 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
89 return unless $class eq 'Catalyst';
91 my $caller = caller();
92 return if $caller eq 'main';
94 my $meta = Moose::Meta::Class->initialize($caller);
95 unless ( $caller->isa('Catalyst') ) {
96 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Controller');
97 $meta->superclasses(@superclasses);
99 # Avoid possible C3 issues if 'Moose::Object' is already on RHS of MyApp
100 $meta->superclasses(grep { $_ ne 'Moose::Object' } $meta->superclasses);
102 unless( $meta->has_method('meta') ){
103 if ($Moose::VERSION >= 1.15) {
104 $meta->_add_meta_method('meta');
107 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
111 $caller->arguments( [@arguments] );
115 sub _application { $_[0] }
119 Catalyst - The Elegant MVC Web Application Framework
123 See the L<Catalyst::Manual> distribution for comprehensive
124 documentation and tutorials.
126 # Install Catalyst::Devel for helpers and other development tools
127 # use the helper to create a new application
130 # add models, views, controllers
131 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
132 script/myapp_create.pl view MyTemplate TT
133 script/myapp_create.pl controller Search
135 # built in testserver -- use -r to restart automatically on changes
136 # --help to see all available options
137 script/myapp_server.pl
139 # command line testing interface
140 script/myapp_test.pl /yada
143 use Catalyst qw/-Debug/; # include plugins here as well
145 ### In lib/MyApp/Controller/Root.pm (autocreated)
146 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
147 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
148 $c->stash->{template} = 'foo.tt'; # set the template
149 # lookup something from db -- stash vars are passed to TT
151 $c->model('Database::Foo')->search( { country => $args[0] } );
152 if ( $c->req->params->{bar} ) { # access GET or POST parameters
153 $c->forward( 'bar' ); # process another action
154 # do something else after forward returns
158 # The foo.tt TT template can use the stash data from the database
159 [% WHILE (item = data.next) %]
163 # called for /bar/of/soap, /bar/of/soap/10, etc.
164 sub bar : Path('/bar/of/soap') { ... }
166 # called for all actions, from the top-most controller downwards
168 my ( $self, $c ) = @_;
169 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
170 $c->res->redirect( '/login' ); # require login
171 return 0; # abort request and go immediately to end()
173 return 1; # success; carry on to next action
176 # called after all actions are finished
178 my ( $self, $c ) = @_;
179 if ( scalar @{ $c->error } ) { ... } # handle errors
180 return if $c->res->body; # already have a response
181 $c->forward( 'MyApp::View::TT' ); # render template
184 ### in MyApp/Controller/Foo.pm
185 # called for /foo/bar
186 sub bar : Local { ... }
188 # called for /blargle
189 sub blargle : Global { ... }
191 # an index action matches /foo, but not /foo/1, etc.
192 sub index : Private { ... }
194 ### in MyApp/Controller/Foo/Bar.pm
195 # called for /foo/bar/baz
196 sub baz : Local { ... }
198 # first Root auto is called, then Foo auto, then this
199 sub auto : Private { ... }
201 # powerful regular expression paths are also possible
202 sub details : Regex('^product/(\w+)/details$') {
203 my ( $self, $c ) = @_;
204 # extract the (\w+) from the URI
205 my $product = $c->req->captures->[0];
208 See L<Catalyst::Manual::Intro> for additional information.
212 Catalyst is a modern framework for making web applications without the
213 pain usually associated with this process. This document is a reference
214 to the main Catalyst application. If you are a new user, we suggest you
215 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
217 See L<Catalyst::Manual> for more documentation.
219 Catalyst plugins can be loaded by naming them as arguments to the "use
220 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
221 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
224 use Catalyst qw/My::Module/;
226 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
227 fully qualify the name by using a unary plus:
231 +Fully::Qualified::Plugin::Name
234 Special flags like C<-Debug> and C<-Engine> can also be specified as
235 arguments when Catalyst is loaded:
237 use Catalyst qw/-Debug My::Module/;
239 The position of plugins and flags in the chain is important, because
240 they are loaded in the order in which they appear.
242 The following flags are supported:
246 Enables debug output. You can also force this setting from the system
247 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
248 settings override the application, with <MYAPP>_DEBUG having the highest
251 This sets the log level to 'debug' and enables full debug output on the
252 error screen. If you only want the latter, see L<< $c->debug >>.
256 Forces Catalyst to use a specific engine. Omit the
257 C<Catalyst::Engine::> prefix of the engine name, i.e.:
259 use Catalyst qw/-Engine=CGI/;
263 Forces Catalyst to use a specific home directory, e.g.:
265 use Catalyst qw[-Home=/usr/mst];
267 This can also be done in the shell environment by setting either the
268 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
269 is replaced with the uppercased name of your application, any "::" in
270 the name will be replaced with underscores, e.g. MyApp::Web should use
271 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
273 If none of these are set, Catalyst will attempt to automatically detect the
274 home directory. If you are working in a development envirnoment, Catalyst
275 will try and find the directory containing either Makefile.PL, Build.PL or
276 dist.ini. If the application has been installed into the system (i.e.
277 you have done C<make install>), then Catalyst will use the path to your
278 application module, without the .pm extension (ie, /foo/MyApp if your
279 application was installed at /foo/MyApp.pm)
283 use Catalyst '-Log=warn,fatal,error';
285 Specifies a comma-delimited list of log levels.
289 Enables statistics collection and reporting.
291 use Catalyst qw/-Stats=1/;
293 You can also force this setting from the system environment with CATALYST_STATS
294 or <MYAPP>_STATS. The environment settings override the application, with
295 <MYAPP>_STATS having the highest priority.
297 Stats are also enabled if L<< debugging |/"-Debug" >> is enabled.
301 =head2 INFORMATION ABOUT THE CURRENT REQUEST
305 Returns a L<Catalyst::Action> object for the current action, which
306 stringifies to the action name. See L<Catalyst::Action>.
310 Returns the namespace of the current action, i.e., the URI prefix
311 corresponding to the controller of the current action. For example:
313 # in Controller::Foo::Bar
314 $c->namespace; # returns 'foo/bar';
320 Returns the current L<Catalyst::Request> object, giving access to
321 information about the current client request (including parameters,
322 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
324 =head2 REQUEST FLOW HANDLING
326 =head2 $c->forward( $action [, \@arguments ] )
328 =head2 $c->forward( $class, $method, [, \@arguments ] )
330 Forwards processing to another action, by its private name. If you give a
331 class name but no method, C<process()> is called. You may also optionally
332 pass arguments in an arrayref. The action will receive the arguments in
333 C<@_> and C<< $c->req->args >>. Upon returning from the function,
334 C<< $c->req->args >> will be restored to the previous values.
336 Any data C<return>ed from the action forwarded to, will be returned by the
339 my $foodata = $c->forward('/foo');
340 $c->forward('index');
341 $c->forward(qw/Model::DBIC::Foo do_stuff/);
342 $c->forward('View::TT');
344 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
345 an C<< eval { } >> around the call (actually
346 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus de-fatalizing
347 all 'dies' within the called action. If you want C<die> to propagate you
348 need to do something like:
351 die join "\n", @{ $c->error } if @{ $c->error };
353 Or make sure to always return true values from your actions and write
356 $c->forward('foo') || return;
358 Another note is that C<< $c->forward >> always returns a scalar because it
359 actually returns $c->state which operates in a scalar context.
360 Thus, something like:
364 in an action that is forwarded to is going to return a scalar,
365 i.e. how many items are in that array, which is probably not what you want.
366 If you need to return an array then return a reference to it,
369 $c->stash->{array} = \@array;
371 and access it from the stash.
373 Keep in mind that the C<end> method used is that of the caller action. So a C<$c-E<gt>detach> inside a forwarded action would run the C<end> method from the original action requested.
377 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
379 =head2 $c->detach( $action [, \@arguments ] )
381 =head2 $c->detach( $class, $method, [, \@arguments ] )
385 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
386 doesn't return to the previous action when processing is finished.
388 When called with no arguments it escapes the processing chain entirely.
392 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
394 =head2 $c->visit( $action [, \@captures, \@arguments ] )
396 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
398 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
399 but does a full dispatch, instead of just calling the new C<$action> /
400 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
401 you go to are called, just like a new request.
403 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
404 This means, for example, that C<< $c->action >> methods such as
405 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
406 L<reverse|Catalyst::Action/reverse> return information for the visited action
407 when they are invoked within the visited action. This is different from the
408 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
409 continues to use the $c->action object from the caller action even when
410 invoked from the callee.
412 C<< $c->stash >> is kept unchanged.
414 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
415 allows you to "wrap" another action, just as it would have been called by
416 dispatching from a URL, while the analogous
417 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
418 transfer control to another action as if it had been reached directly from a URL.
422 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
424 =head2 $c->go( $action [, \@captures, \@arguments ] )
426 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
428 The relationship between C<go> and
429 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
430 the relationship between
431 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
432 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
433 C<< $c->go >> will perform a full dispatch on the specified action or method,
434 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
435 C<go> escapes the processing of the current request chain on completion, and
436 does not return to its caller.
438 @arguments are arguments to the final destination of $action. @captures are
439 arguments to the intermediate steps, if any, on the way to the final sub of
444 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
450 Returns the current L<Catalyst::Response> object, see there for details.
454 Returns a hashref to the stash, which may be used to store data and pass
455 it between components during a request. You can also set hash keys by
456 passing arguments. The stash is automatically sent to the view. The
457 stash is cleared at the end of a request; it cannot be used for
458 persistent storage (for this you must use a session; see
459 L<Catalyst::Plugin::Session> for a complete system integrated with
462 $c->stash->{foo} = $bar;
463 $c->stash( { moose => 'majestic', qux => 0 } );
464 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
466 # stash is automatically passed to the view for use in a template
467 $c->forward( 'MyApp::View::TT' );
471 around stash => sub {
474 my $stash = $orig->($c);
476 my $new_stash = @_ > 1 ? {@_} : $_[0];
477 croak('stash takes a hash or hashref') unless ref $new_stash;
478 foreach my $key ( keys %$new_stash ) {
479 $stash->{$key} = $new_stash->{$key};
489 =head2 $c->error($error, ...)
491 =head2 $c->error($arrayref)
493 Returns an arrayref containing error messages. If Catalyst encounters an
494 error while processing a request, it stores the error in $c->error. This
495 method should only be used to store fatal error messages.
497 my @error = @{ $c->error };
501 $c->error('Something bad happened');
508 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
509 croak @$error unless ref $c;
510 push @{ $c->{error} }, @$error;
512 elsif ( defined $_[0] ) { $c->{error} = undef }
513 return $c->{error} || [];
519 Contains the return value of the last executed action.
520 Note that << $c->state >> operates in a scalar context which means that all
521 values it returns are scalar.
523 =head2 $c->clear_errors
525 Clear errors. You probably don't want to clear the errors unless you are
526 implementing a custom error screen.
528 This is equivalent to running
539 =head2 COMPONENT ACCESSORS
541 =head2 $c->controller($name)
543 Gets a L<Catalyst::Controller> instance by name.
545 $c->controller('Foo')->do_stuff;
547 If the name is omitted, will return the controller for the dispatched
550 If you want to search for controllers, pass in a regexp as the argument.
552 # find all controllers that start with Foo
553 my @foo_controllers = $c->controller(qr{^Foo});
559 my ( $c, $name, @args ) = @_;
560 my $container = $c->container->get_sub_container('controller');
562 my $appclass = ref $c || $c;
564 if ( !ref $name ) { # Direct component hash lookup to avoid costly regexps
565 return $container->resolve(service => $name, parameters => { context => [ $c, @args ] } )
566 if $container->has_service($name);
570 if $c->config->{disable_component_resolution_regex_fallback} && !ref $name;
572 my @comps = $container->get_service_list;
575 push @result, $container->resolve( service => $_, parameters => { context => [ $c, @args ] } )
581 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
582 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
583 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
592 return $c->component( $c->action->class );
595 =head2 $c->model($name)
597 Gets a L<Catalyst::Model> instance by name.
599 $c->model('Foo')->do_stuff;
601 Any extra arguments are directly passed to ACCEPT_CONTEXT.
603 If the name is omitted, it will look for
604 - a model object in $c->stash->{current_model_instance}, then
605 - a model name in $c->stash->{current_model}, then
606 - a config setting 'default_model', or
607 - check if there is only one model, and return it if that's the case.
609 If you want to search for models, pass in a regexp as the argument.
611 # find all models that start with Foo
612 my @foo_models = $c->model(qr{^Foo});
617 my ( $c, $name, @args ) = @_;
618 my $appclass = ref($c) || $c;
619 my $container = $c->container->get_sub_container('model');
622 if ( !ref $name && $container->has_service($name)) { # Direct component hash lookup to avoid costly regexps
623 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
627 if $c->config->{disable_component_resolution_regex_fallback} && !ref $name;
629 my @comps = $container->get_service_list;
632 push @result, $container->resolve( service => $_, parameters => { context => [ $c, @args ] } )
638 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
639 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
640 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
650 return $c->stash->{current_model_instance}
651 if $c->stash->{current_model_instance};
652 return $c->model( $c->stash->{current_model} )
653 if $c->stash->{current_model};
655 return $c->model( $appclass->config->{default_model} )
656 if $appclass->config->{default_model};
658 # FIXME: will this still be mantained?
659 my( $comp, $rest ) = $container->get_service_list;
662 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
663 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
664 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
665 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
666 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
669 return $container->resolve( service => $comp, parameters => { context => [ $c, @args ] } );
673 =head2 $c->view($name)
675 Gets a L<Catalyst::View> instance by name.
677 $c->view('Foo')->do_stuff;
679 Any extra arguments are directly passed to ACCEPT_CONTEXT.
681 If the name is omitted, it will look for
682 - a view object in $c->stash->{current_view_instance}, then
683 - a view name in $c->stash->{current_view}, then
684 - a config setting 'default_view', or
685 - check if there is only one view, and return it if that's the case.
687 If you want to search for views, pass in a regexp as the argument.
689 # find all views that start with Foo
690 my @foo_views = $c->view(qr{^Foo});
695 my ( $c, $name, @args ) = @_;
696 my $appclass = ref($c) || $c;
697 my $container = $c->container->get_sub_container('view');
700 if ( !ref $name ) { # Direct component hash lookup to avoid costly regexps
701 if ( $container->has_service($name) ) {
702 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
705 $c->log->warn( "Attempted to use view '$name', but does not exist" );
710 if $c->config->{disable_component_resolution_regex_fallback} && !ref $name;
712 my @comps = $container->get_service_list;
715 push @result, $container->resolve( service => $_, parameters => { context => [ $c, @args ] } )
721 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
722 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
723 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
733 return $c->stash->{current_view_instance}
734 if $c->stash->{current_view_instance};
735 return $c->view( $c->stash->{current_view} )
736 if $c->stash->{current_view};
738 return $c->view( $appclass->config->{default_view} )
739 if $appclass->config->{default_view};
741 my( $comp, $rest ) = $container->get_service_list;
744 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
745 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
746 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
747 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
748 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
751 return $container->resolve( service => $comp, parameters => { context => [ $c, @args ] } );
754 =head2 $c->controllers
756 Returns the available names which can be passed to $c->controller
762 return $c->container->get_sub_container('controller')->get_service_list;
767 Returns the available names which can be passed to $c->model
773 return $c->container->get_sub_container('model')->get_service_list;
779 Returns the available names which can be passed to $c->view
785 return $c->container->get_sub_container('view')->get_service_list;
788 =head2 $c->comp($name)
790 =head2 $c->component($name)
792 Gets a component object by name. This method is not recommended,
793 unless you want to get a specific component by full
794 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
795 should be used instead.
797 If C<$name> is a regexp, a list of components matched against the full
798 component name will be returned.
800 If Catalyst can't find a component by name, it will fallback to regex
801 matching by default. To disable this behaviour set
802 disable_component_resolution_regex_fallback to a true value.
804 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
809 my ( $c, $component, @args ) = @_;
812 my ($type, $name) = _get_component_type_name($component);
814 if ($type && $c->container->has_sub_container($type)) {
815 my $container = $c->container->get_sub_container($type);
817 if( !ref $component && $container->has_service($name) ) {
818 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
823 if $c->config->{disable_component_resolution_regex_fallback};
825 # This is here so $c->comp( '::M::' ) works
826 my $query = ref $component ? $component : qr{$component}i;
828 for my $subcontainer_name (qw/model view controller/) {
829 my $subcontainer = $c->container->get_sub_container($subcontainer_name);
830 my @components = $subcontainer->get_service_list;
831 my @result = grep { m{$query} } @components;
834 return map { $subcontainer->resolve( service => $_, parameters => { context => [$c, @args] } ) } @result
837 $c->log->warn( Carp::shortmess(qq(Found results for "${component}" using regexp fallback)) );
838 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
839 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
841 return $subcontainer->resolve( service => $result[0], parameters => { context => [$c, @args] } );
845 # I would expect to return an empty list here, but that breaks back-compat
849 return sort keys %{ $c->components };
852 =head2 CLASS DATA AND HELPER CLASSES
856 Returns or takes a hashref containing the application's configuration.
858 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
860 You can also use a C<YAML>, C<XML> or L<Config::General> config file
861 like C<myapp.conf> in your applications home directory. See
862 L<Catalyst::Plugin::ConfigLoader>.
864 =head3 Cascading configuration
866 The config method is present on all Catalyst components, and configuration
867 will be merged when an application is started. Configuration loaded with
868 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
869 followed by configuration in your top level C<MyApp> class. These two
870 configurations are merged, and then configuration data whose hash key matches a
871 component name is merged with configuration for that component.
873 The configuration for a component is then passed to the C<new> method when a
874 component is constructed.
878 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
879 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
881 will mean that C<MyApp::Model::Foo> receives the following data when
884 MyApp::Model::Foo->new({
890 It's common practice to use a Moose attribute
891 on the receiving component to access the config value.
893 package MyApp::Model::Foo;
897 # this attr will receive 'baz' at construction time
903 You can then get the value 'baz' by calling $c->model('Foo')->bar
904 (or $self->bar inside code in the model).
906 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
907 as a way of reading config within your code, as this B<will not> give you the
908 correctly merged config back. You B<MUST> take the config values supplied to
909 the constructor and use those instead.
913 around config => sub {
917 croak('Setting config after setup has been run is not allowed.')
918 if ( @_ and $c->setup_finished );
925 Returns the logging object instance. Unless it is already set, Catalyst
926 sets this up with a L<Catalyst::Log> object. To use your own log class,
927 set the logger with the C<< __PACKAGE__->log >> method prior to calling
928 C<< __PACKAGE__->setup >>.
930 __PACKAGE__->log( MyLogger->new );
935 $c->log->info( 'Now logging with my own logger!' );
937 Your log class should implement the methods described in
943 Returns 1 if debug mode is enabled, 0 otherwise.
945 You can enable debug mode in several ways:
949 =item By calling myapp_server.pl with the -d flag
951 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
953 =item The -Debug option in your MyApp.pm
955 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
959 The first three also set the log level to 'debug'.
961 Calling C<< $c->debug(1) >> has no effect.
967 =head2 $c->dispatcher
969 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
973 Returns the engine instance. See L<Catalyst::Engine>.
976 =head2 UTILITY METHODS
978 =head2 $c->path_to(@path)
980 Merges C<@path> with C<< $c->config->{home} >> and returns a
981 L<Path::Class::Dir> object. Note you can usually use this object as
982 a filename, but sometimes you will have to explicitly stringify it
983 yourself by calling the C<< ->stringify >> method.
987 $c->path_to( 'db', 'sqlite.db' );
992 my ( $c, @path ) = @_;
993 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
994 if ( -d $path ) { return $path }
995 else { return Path::Class::File->new( $c->config->{home}, @path ) }
998 =head2 $c->plugin( $name, $class, @args )
1000 Helper method for plugins. It creates a class data accessor/mutator and
1001 loads and instantiates the given class.
1003 MyApp->plugin( 'prototype', 'HTML::Prototype' );
1005 $c->prototype->define_javascript_functions;
1007 B<Note:> This method of adding plugins is deprecated. The ability
1008 to add plugins like this B<will be removed> in a Catalyst 5.81.
1009 Please do not use this functionality in new code.
1014 my ( $class, $name, $plugin, @args ) = @_;
1016 # See block comment in t/unit_core_plugin.t
1017 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
1019 $class->_register_plugin( $plugin, 1 );
1021 eval { $plugin->import };
1022 $class->mk_classdata($name);
1024 eval { $obj = $plugin->new(@args) };
1027 Catalyst::Exception->throw( message =>
1028 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1031 $class->$name($obj);
1032 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1038 Initializes the dispatcher and engine, loads any plugins, and loads the
1039 model, view, and controller components. You may also specify an array
1040 of plugins to load here, if you choose to not load them in the C<use
1044 MyApp->setup( qw/-Debug/ );
1049 my ( $class, @arguments ) = @_;
1050 croak('Running setup more than once')
1051 if ( $class->setup_finished );
1053 unless ( $class->isa('Catalyst') ) {
1055 Catalyst::Exception->throw(
1056 message => qq/'$class' does not inherit from Catalyst/ );
1059 if ( $class->arguments ) {
1060 @arguments = ( @arguments, @{ $class->arguments } );
1066 foreach (@arguments) {
1070 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1072 elsif (/^-(\w+)=?(.*)$/) {
1073 $flags->{ lc $1 } = $2;
1076 push @{ $flags->{plugins} }, $_;
1080 $class->setup_config();
1081 $class->setup_home( delete $flags->{home} );
1083 $class->setup_log( delete $flags->{log} );
1084 $class->setup_plugins( delete $flags->{plugins} );
1085 $class->setup_dispatcher( delete $flags->{dispatcher} );
1086 $class->setup_engine( delete $flags->{engine} );
1087 $class->setup_stats( delete $flags->{stats} );
1089 for my $flag ( sort keys %{$flags} ) {
1091 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1092 &$code( $class, delete $flags->{$flag} );
1095 $class->log->warn(qq/Unknown flag "$flag"/);
1099 eval { require Catalyst::Devel; };
1100 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1101 $class->log->warn(<<"EOF");
1102 You are running an old script!
1104 Please update by running (this will overwrite existing files):
1105 catalyst.pl -force -scripts $class
1107 or (this will not overwrite existing files):
1108 catalyst.pl -scripts $class
1113 if ( $class->debug ) {
1114 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1117 my $column_width = Catalyst::Utils::term_width() - 6;
1118 my $t = Text::SimpleTable->new($column_width);
1119 $t->row($_) for @plugins;
1120 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1123 my $dispatcher = $class->dispatcher;
1124 my $engine = $class->engine;
1125 my $home = $class->config->{home};
1127 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1128 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1132 ? $class->log->debug(qq/Found home "$home"/)
1133 : $class->log->debug(qq/Home "$home" doesn't exist/)
1134 : $class->log->debug(q/Couldn't find home/);
1137 # Call plugins setup, this is stupid and evil.
1138 # Also screws C3 badly on 5.10, hack to avoid.
1140 no warnings qw/redefine/;
1141 local *setup = sub { };
1142 $class->setup unless $Catalyst::__AM_RESTARTING;
1145 # Initialize our data structure
1146 $class->components( {} );
1148 $class->setup_components;
1150 if ( $class->debug ) {
1151 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1152 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1153 for my $comp ( sort keys %{ $class->components } ) {
1154 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1155 $t->row( $comp, $type );
1157 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1158 if ( keys %{ $class->components } );
1161 # Add our self to components, since we are also a component
1162 if( $class->isa('Catalyst::Controller') ){
1163 $class->components->{$class} = $class;
1166 $class->setup_actions;
1168 if ( $class->debug ) {
1169 my $name = $class->config->{name} || 'Application';
1170 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1173 # Make sure that the application class becomes immutable at this point,
1174 B::Hooks::EndOfScope::on_scope_end {
1176 my $meta = Class::MOP::get_metaclass_by_name($class);
1179 && ! { $meta->immutable_options }->{replace_constructor}
1181 $class->isa('Class::Accessor::Fast')
1182 || $class->isa('Class::Accessor')
1185 warn "You made your application class ($class) immutable, "
1186 . "but did not inline the\nconstructor. "
1187 . "This will break catalyst, as your app \@ISA "
1188 . "Class::Accessor(::Fast)?\nPlease pass "
1189 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1191 $meta->make_immutable(
1192 replace_constructor => 1,
1193 ) unless $meta->is_immutable;
1196 if ($class->config->{case_sensitive}) {
1197 $class->log->warn($class . "->config->{case_sensitive} is set.");
1198 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1201 $class->setup_finalize;
1202 # Should be the last thing we do so that user things hooking
1203 # setup_finalize can log..
1204 $class->log->_flush() if $class->log->can('_flush');
1205 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1208 =head2 $app->setup_finalize
1210 A hook to attach modifiers to. This method does not do anything except set the
1211 C<setup_finished> accessor.
1213 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1217 after setup_finalize => sub {
1225 sub setup_finalize {
1227 $class->setup_finished(1);
1230 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1232 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1234 Constructs an absolute L<URI> object based on the application root, the
1235 provided path, and the additional arguments and query parameters provided.
1236 When used as a string, provides a textual URI. If you need more flexibility
1237 than this (i.e. the option to provide relative URIs etc.) see
1238 L<Catalyst::Plugin::SmartURI>.
1240 If no arguments are provided, the URI for the current action is returned.
1241 To return the current action and also provide @args, use
1242 C<< $c->uri_for( $c->action, @args ) >>.
1244 If the first argument is a string, it is taken as a public URI path relative
1245 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1246 relative to the application root (if it does). It is then merged with
1247 C<< $c->request->base >>; any C<@args> are appended as additional path
1248 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1250 If the first argument is a L<Catalyst::Action> it represents an action which
1251 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1252 optional C<\@captures> argument (an arrayref) allows passing the captured
1253 variables that are needed to fill in the paths of Chained and Regex actions;
1254 once the path is resolved, C<uri_for> continues as though a path was
1255 provided, appending any arguments or parameters and creating an absolute
1258 The captures for the current request can be found in
1259 C<< $c->request->captures >>, and actions can be resolved using
1260 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1261 path, use C<< $c->uri_for_action >> instead.
1263 # Equivalent to $c->req->uri
1264 $c->uri_for($c->action, $c->req->captures,
1265 @{ $c->req->args }, $c->req->params);
1267 # For the Foo action in the Bar controller
1268 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1270 # Path to a static resource
1271 $c->uri_for('/static/images/logo.png');
1276 my ( $c, $path, @args ) = @_;
1278 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1279 $path = $path->path_prefix;
1284 undef($path) if (defined $path && $path eq '');
1287 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1289 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1290 foreach my $arg (@args) {
1291 utf8::encode($arg) if utf8::is_utf8($arg);
1292 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1295 if ( blessed($path) ) { # action object
1296 s|/|%2F|g for @args;
1297 my $captures = [ map { s|/|%2F|g; $_; }
1298 ( scalar @args && ref $args[0] eq 'ARRAY'
1302 foreach my $capture (@$captures) {
1303 utf8::encode($capture) if utf8::is_utf8($capture);
1304 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1308 $path = $c->dispatcher->uri_for_action($action, $captures);
1309 if (not defined $path) {
1310 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1314 $path = '/' if $path eq '';
1317 unshift(@args, $path);
1319 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1320 my $namespace = $c->namespace;
1321 if (defined $path) { # cheesy hack to handle path '../foo'
1322 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1324 unshift(@args, $namespace || '');
1327 # join args with '/', or a blank string
1328 my $args = join('/', grep { defined($_) } @args);
1329 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1331 my $base = $c->req->base;
1332 my $class = ref($base);
1333 $base =~ s{(?<!/)$}{/};
1337 if (my @keys = keys %$params) {
1338 # somewhat lifted from URI::_query's query_form
1339 $query = '?'.join('&', map {
1340 my $val = $params->{$_};
1341 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1344 $val = '' unless defined $val;
1347 utf8::encode( $param ) if utf8::is_utf8($param);
1348 # using the URI::Escape pattern here so utf8 chars survive
1349 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1351 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1355 my $res = bless(\"${base}${args}${query}", $class);
1359 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1361 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1367 A private path to the Catalyst action you want to create a URI for.
1369 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1370 >> and passing the resulting C<$action> and the remaining arguments to C<<
1373 You can also pass in a Catalyst::Action object, in which case it is passed to
1376 Note that although the path looks like a URI that dispatches to the wanted action, it is not a URI, but an internal path to that action.
1378 For example, if the action looks like:
1380 package MyApp::Controller::Users;
1382 sub lst : Path('the-list') {}
1386 $c->uri_for_action('/users/lst')
1388 and it will create the URI /users/the-list.
1394 sub uri_for_action {
1395 my ( $c, $path, @args ) = @_;
1396 my $action = blessed($path)
1398 : $c->dispatcher->get_action_by_path($path);
1399 unless (defined $action) {
1400 croak "Can't find action for path '$path'";
1402 return $c->uri_for( $action, @args );
1405 =head2 $c->welcome_message
1407 Returns the Catalyst welcome HTML page.
1411 sub welcome_message {
1413 my $name = $c->config->{name};
1414 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1415 my $prefix = Catalyst::Utils::appprefix( ref $c );
1416 $c->response->content_type('text/html; charset=utf-8');
1418 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1419 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1420 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1422 <meta http-equiv="Content-Language" content="en" />
1423 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1424 <title>$name on Catalyst $VERSION</title>
1425 <style type="text/css">
1428 background-color: #eee;
1435 margin-bottom: 10px;
1437 background-color: #ccc;
1438 border: 1px solid #aaa;
1443 font-family: verdana, tahoma, sans-serif;
1446 font-family: verdana, tahoma, sans-serif;
1449 text-decoration: none;
1451 border-bottom: 1px dotted #bbb;
1453 :link:hover, :visited:hover {
1466 background-color: #fff;
1467 border: 1px solid #aaa;
1471 font-weight: normal;
1493 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1498 <img src="$logo" alt="Catalyst Logo" />
1500 <p>Welcome to the world of Catalyst.
1501 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1502 framework will make web development something you had
1503 never expected it to be: Fun, rewarding, and quick.</p>
1504 <h2>What to do now?</h2>
1505 <p>That really depends on what <b>you</b> want to do.
1506 We do, however, provide you with a few starting points.</p>
1507 <p>If you want to jump right into web development with Catalyst
1508 you might want to start with a tutorial.</p>
1509 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1511 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1513 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1514 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1516 <h2>What to do next?</h2>
1517 <p>Next it's time to write an actual application. Use the
1518 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1519 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1520 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1521 they can save you a lot of work.</p>
1522 <pre><code>script/${prefix}_create.pl --help</code></pre>
1523 <p>Also, be sure to check out the vast and growing
1524 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1525 you are likely to find what you need there.
1529 <p>Catalyst has a very active community. Here are the main places to
1530 get in touch with us.</p>
1533 <a href="http://dev.catalyst.perl.org">Wiki</a>
1536 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1539 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1542 <h2>In conclusion</h2>
1543 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1544 as we enjoyed making it. Please contact us if you have ideas
1545 for improvement or other feedback.</p>
1553 =head1 INTERNAL METHODS
1555 These methods are not meant to be used by end users.
1557 =head2 $c->components
1559 Returns a hash of components.
1563 around components => sub {
1568 return $class->$orig if ( !$comps );
1570 # FIXME: should this ugly kludge exist?
1571 $class->setup_config unless defined $class->container;
1573 # FIXME: should there be a warning here, not to use this accessor to create the components?
1574 my $components = {};
1577 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
1579 for my $component ( keys %$comps ) {
1580 $components->{ $component } = $comps->{$component};
1582 my ($type, $name) = _get_component_type_name($component);
1584 # FIXME: shouldn't the service name be $name?
1585 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
1588 return $class->$orig($components);
1591 =head2 $c->context_class
1593 Returns or sets the context class.
1597 Returns a hashref containing coderefs and execution counts (needed for
1598 deep recursion detection).
1602 Returns the number of actions on the current internal execution stack.
1606 Dispatches a request to actions.
1610 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1612 =head2 $c->dispatcher_class
1614 Returns or sets the dispatcher class.
1616 =head2 $c->dump_these
1618 Returns a list of 2-element array references (name, structure) pairs
1619 that will be dumped on the error page in debug mode.
1625 [ Request => $c->req ],
1626 [ Response => $c->res ],
1627 [ Stash => $c->stash ],
1628 [ Config => $c->config ];
1631 =head2 $c->engine_class
1633 Returns or sets the engine class.
1635 =head2 $c->execute( $class, $coderef )
1637 Execute a coderef in given class and catch exceptions. Errors are available
1643 my ( $c, $class, $code ) = @_;
1644 $class = $c->component($class) || $class;
1647 if ( $c->depth >= $RECURSION ) {
1648 my $action = $code->reverse();
1649 $action = "/$action" unless $action =~ /->/;
1650 my $error = qq/Deep recursion detected calling "${action}"/;
1651 $c->log->error($error);
1657 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1659 push( @{ $c->stack }, $code );
1661 no warnings 'recursion';
1662 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1663 # I have no idea how, ergo $ret (which appears to fix the issue)
1664 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1666 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1668 my $last = pop( @{ $c->stack } );
1670 if ( my $error = $@ ) {
1671 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1672 $error->rethrow if $c->depth > 1;
1674 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1675 $error->rethrow if $c->depth > 0;
1678 unless ( ref $error ) {
1679 no warnings 'uninitialized';
1681 my $class = $last->class;
1682 my $name = $last->name;
1683 $error = qq/Caught exception in $class->$name "$error"/;
1692 sub _stats_start_execute {
1693 my ( $c, $code ) = @_;
1694 my $appclass = ref($c) || $c;
1695 return if ( ( $code->name =~ /^_.*/ )
1696 && ( !$appclass->config->{show_internal_actions} ) );
1698 my $action_name = $code->reverse();
1699 $c->counter->{$action_name}++;
1701 my $action = $action_name;
1702 $action = "/$action" unless $action =~ /->/;
1704 # determine if the call was the result of a forward
1705 # this is done by walking up the call stack and looking for a calling
1706 # sub of Catalyst::forward before the eval
1708 for my $index ( 2 .. 11 ) {
1710 if ( ( caller($index) )[0] eq 'Catalyst'
1711 && ( caller($index) )[3] eq '(eval)' );
1713 if ( ( caller($index) )[3] =~ /forward$/ ) {
1714 $callsub = ( caller($index) )[3];
1715 $action = "-> $action";
1720 my $uid = $action_name . $c->counter->{$action_name};
1722 # is this a root-level call or a forwarded call?
1723 if ( $callsub =~ /forward$/ ) {
1724 my $parent = $c->stack->[-1];
1726 # forward, locate the caller
1727 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1730 parent => "$parent" . $c->counter->{"$parent"},
1736 # forward with no caller may come from a plugin
1755 sub _stats_finish_execute {
1756 my ( $c, $info ) = @_;
1757 $c->stats->profile( end => $info );
1762 Finalizes the request.
1769 for my $error ( @{ $c->error } ) {
1770 $c->log->error($error);
1773 # Allow engine to handle finalize flow (for POE)
1774 my $engine = $c->engine;
1775 if ( my $code = $engine->can('finalize') ) {
1780 $c->finalize_uploads;
1783 if ( $#{ $c->error } >= 0 ) {
1787 $c->finalize_headers;
1790 if ( $c->request->method eq 'HEAD' ) {
1791 $c->response->body('');
1799 if ($c->use_stats) {
1800 my $elapsed = sprintf '%f', $c->stats->elapsed;
1801 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1803 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1806 return $c->response->status;
1809 =head2 $c->finalize_body
1815 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1817 =head2 $c->finalize_cookies
1823 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1825 =head2 $c->finalize_error
1831 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1833 =head2 $c->finalize_headers
1839 sub finalize_headers {
1842 my $response = $c->response; #accessor calls can add up?
1844 # Check if we already finalized headers
1845 return if $response->finalized_headers;
1848 if ( my $location = $response->redirect ) {
1849 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1850 $response->header( Location => $location );
1852 if ( !$response->has_body ) {
1853 # Add a default body if none is already present
1855 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1861 if ( defined $response->body && length $response->body && !$response->content_length ) {
1863 # get the length from a filehandle
1864 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1866 my $stat = stat $response->body;
1867 if ( $stat && $stat->size > 0 ) {
1868 $response->content_length( $stat->size );
1871 $c->log->warn('Serving filehandle without a content-length');
1875 # everything should be bytes at this point, but just in case
1876 $response->content_length( length( $response->body ) );
1881 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1882 $response->headers->remove_header("Content-Length");
1883 $response->body('');
1886 $c->finalize_cookies;
1888 $c->engine->finalize_headers( $c, @_ );
1891 $response->finalized_headers(1);
1894 =head2 $c->finalize_output
1896 An alias for finalize_body.
1898 =head2 $c->finalize_read
1900 Finalizes the input after reading is complete.
1904 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1906 =head2 $c->finalize_uploads
1908 Finalizes uploads. Cleans up any temporary files.
1912 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1914 =head2 $c->get_action( $action, $namespace )
1916 Gets an action in a given namespace.
1920 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1922 =head2 $c->get_actions( $action, $namespace )
1924 Gets all actions of a given name in a namespace and all parent
1929 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1931 =head2 $app->handle_request( @arguments )
1933 Called to handle each HTTP request.
1937 sub handle_request {
1938 my ( $class, @arguments ) = @_;
1940 # Always expect worst case!
1943 if ($class->debug) {
1944 my $secs = time - $START || 1;
1945 my $av = sprintf '%.3f', $COUNT / $secs;
1946 my $time = localtime time;
1947 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1950 my $c = $class->prepare(@arguments);
1952 $status = $c->finalize;
1955 if ( my $error = $@ ) {
1957 $class->log->error(qq/Caught exception in engine "$error"/);
1962 if(my $coderef = $class->log->can('_flush')){
1963 $class->log->$coderef();
1968 =head2 $c->prepare( @arguments )
1970 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1976 my ( $class, @arguments ) = @_;
1979 # After the app/ctxt split, this should become an attribute based on something passed
1980 # into the application.
1981 $class->context_class( ref $class || $class ) unless $class->context_class;
1983 my $c = $class->context_class->new({});
1985 # For on-demand data
1986 $c->request->_context($c);
1987 $c->response->_context($c);
1989 #surely this is not the most efficient way to do things...
1990 $c->stats($class->stats_class->new)->enable($c->use_stats);
1991 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
1992 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1995 #XXX reuse coderef from can
1996 # Allow engine to direct the prepare flow (for POE)
1997 if ( $c->engine->can('prepare') ) {
1998 $c->engine->prepare( $c, @arguments );
2001 $c->prepare_request(@arguments);
2002 $c->prepare_connection;
2003 $c->prepare_query_parameters;
2004 $c->prepare_headers;
2005 $c->prepare_cookies;
2008 # Prepare the body for reading, either by prepare_body
2009 # or the user, if they are using $c->read
2012 # Parse the body unless the user wants it on-demand
2013 unless ( ref($c)->config->{parse_on_demand} ) {
2018 my $method = $c->req->method || '';
2019 my $path = $c->req->path;
2020 $path = '/' unless length $path;
2021 my $address = $c->req->address || '';
2030 =head2 $c->prepare_action
2032 Prepares action. See L<Catalyst::Dispatcher>.
2036 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
2038 =head2 $c->prepare_body
2040 Prepares message body.
2047 return if $c->request->_has_body;
2049 # Initialize on-demand data
2050 $c->engine->prepare_body( $c, @_ );
2051 $c->prepare_parameters;
2052 $c->prepare_uploads;
2055 =head2 $c->prepare_body_chunk( $chunk )
2057 Prepares a chunk of data before sending it to L<HTTP::Body>.
2059 See L<Catalyst::Engine>.
2063 sub prepare_body_chunk {
2065 $c->engine->prepare_body_chunk( $c, @_ );
2068 =head2 $c->prepare_body_parameters
2070 Prepares body parameters.
2074 sub prepare_body_parameters {
2076 $c->engine->prepare_body_parameters( $c, @_ );
2079 =head2 $c->prepare_connection
2081 Prepares connection.
2085 sub prepare_connection {
2087 $c->engine->prepare_connection( $c, @_ );
2090 =head2 $c->prepare_cookies
2096 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2098 =head2 $c->prepare_headers
2104 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2106 =head2 $c->prepare_parameters
2108 Prepares parameters.
2112 sub prepare_parameters {
2114 $c->prepare_body_parameters;
2115 $c->engine->prepare_parameters( $c, @_ );
2118 =head2 $c->prepare_path
2120 Prepares path and base.
2124 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2126 =head2 $c->prepare_query_parameters
2128 Prepares query parameters.
2132 sub prepare_query_parameters {
2135 $c->engine->prepare_query_parameters( $c, @_ );
2138 =head2 $c->log_request
2140 Writes information about the request to the debug logs. This includes:
2144 =item * Request method, path, and remote IP address
2146 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2148 =item * Request parameters
2150 =item * File uploads
2159 return unless $c->debug;
2161 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2162 my $request = $dump->[1];
2164 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2166 $path = '/' unless length $path;
2168 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2170 $c->log_request_headers($request->headers);
2172 if ( my $keywords = $request->query_keywords ) {
2173 $c->log->debug("Query keywords are: $keywords");
2176 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2178 $c->log_request_uploads($request);
2181 =head2 $c->log_response
2183 Writes information about the response to the debug logs by calling
2184 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2191 return unless $c->debug;
2193 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2194 my $response = $dump->[1];
2196 $c->log_response_status_line($response);
2197 $c->log_response_headers($response->headers);
2200 =head2 $c->log_response_status_line($response)
2202 Writes one line of information about the response to the debug logs. This includes:
2206 =item * Response status code
2208 =item * Content-Type header (if present)
2210 =item * Content-Length header (if present)
2216 sub log_response_status_line {
2217 my ($c, $response) = @_;
2221 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2222 $response->status || 'unknown',
2223 $response->headers->header('Content-Type') || 'unknown',
2224 $response->headers->header('Content-Length') || 'unknown'
2229 =head2 $c->log_response_headers($headers);
2231 Hook method which can be wrapped by plugins to log the responseheaders.
2232 No-op in the default implementation.
2236 sub log_response_headers {}
2238 =head2 $c->log_request_parameters( query => {}, body => {} )
2240 Logs request parameters to debug logs
2244 sub log_request_parameters {
2246 my %all_params = @_;
2248 return unless $c->debug;
2250 my $column_width = Catalyst::Utils::term_width() - 44;
2251 foreach my $type (qw(query body)) {
2252 my $params = $all_params{$type};
2253 next if ! keys %$params;
2254 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2255 for my $key ( sort keys %$params ) {
2256 my $param = $params->{$key};
2257 my $value = defined($param) ? $param : '';
2258 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2260 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2264 =head2 $c->log_request_uploads
2266 Logs file uploads included in the request to the debug logs.
2267 The parameter name, filename, file type, and file size are all included in
2272 sub log_request_uploads {
2274 my $request = shift;
2275 return unless $c->debug;
2276 my $uploads = $request->uploads;
2277 if ( keys %$uploads ) {
2278 my $t = Text::SimpleTable->new(
2279 [ 12, 'Parameter' ],
2284 for my $key ( sort keys %$uploads ) {
2285 my $upload = $uploads->{$key};
2286 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2287 $t->row( $key, $u->filename, $u->type, $u->size );
2290 $c->log->debug( "File Uploads are:\n" . $t->draw );
2294 =head2 $c->log_request_headers($headers);
2296 Hook method which can be wrapped by plugins to log the request headers.
2297 No-op in the default implementation.
2301 sub log_request_headers {}
2303 =head2 $c->log_headers($type => $headers)
2305 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2312 my $headers = shift; # an HTTP::Headers instance
2314 return unless $c->debug;
2316 my $column_width = Catalyst::Utils::term_width() - 28;
2317 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2320 my ( $name, $value ) = @_;
2321 $t->row( $name, $value );
2324 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2328 =head2 $c->prepare_read
2330 Prepares the input for reading.
2334 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2336 =head2 $c->prepare_request
2338 Prepares the engine request.
2342 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2344 =head2 $c->prepare_uploads
2350 sub prepare_uploads {
2353 $c->engine->prepare_uploads( $c, @_ );
2356 =head2 $c->prepare_write
2358 Prepares the output for writing.
2362 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2364 =head2 $c->request_class
2366 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2368 =head2 $c->response_class
2370 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2372 =head2 $c->read( [$maxlength] )
2374 Reads a chunk of data from the request body. This method is designed to
2375 be used in a while loop, reading C<$maxlength> bytes on every call.
2376 C<$maxlength> defaults to the size of the request if not specified.
2378 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2381 Warning: If you use read(), Catalyst will not process the body,
2382 so you will not be able to access POST parameters or file uploads via
2383 $c->request. You must handle all body parsing yourself.
2387 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2395 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2397 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2399 Sets an action in a given namespace.
2403 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2405 =head2 $c->setup_actions($component)
2407 Sets up actions for a component.
2411 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2413 =head2 $c->setup_config
2420 my %args = %{ $class->config || {} };
2422 my @container_classes = ( "${class}::Container", 'Catalyst::Container');
2423 unshift @container_classes, delete $args{container_class} if exists $args{container_class};
2425 my $container_class = Class::MOP::load_first_existing_class(@container_classes);
2427 my $container = $container_class->new( %args, name => "$class" );
2428 $class->container($container);
2430 my $config = $container->resolve(service => 'config');
2431 $class->config($config);
2432 $class->finalize_config; # back-compat
2435 =head $c->finalize_config
2439 sub finalize_config { }
2441 =head2 $c->setup_components
2443 This method is called internally to set up the application's components.
2445 It finds modules by calling the L<locate_components> method, expands them to
2446 package names with the L<expand_component_module> method, and then installs
2447 each component into the application.
2449 The C<setup_components> config option is passed to both of the above methods.
2451 Installation of each component is performed by the L<setup_component> method,
2456 sub setup_components {
2459 my $config = $class->config->{ setup_components };
2461 my @comps = $class->locate_components($config);
2462 my %comps = map { $_ => 1 } @comps;
2464 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2465 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2466 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2467 ) if $deprecatedcatalyst_component_names;
2469 for my $component ( @comps ) {
2471 # We pass ignore_loaded here so that overlay files for (e.g.)
2472 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2473 # we know M::P::O found a file on disk so this is safe
2475 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2479 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
2481 for my $component (@comps) {
2482 my $instance = $class->components->{ $component } = $class->setup_component($component);
2483 if ( my ($type, $name) = _get_component_type_name($component) ) {
2484 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $instance } ));
2486 my @expanded_components = $instance->can('expand_modules')
2487 ? $instance->expand_modules( $component, $config )
2488 : $class->expand_component_module( $component, $config );
2489 for my $component (@expanded_components) {
2490 next if $comps{$component};
2492 $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components;
2493 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2494 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2495 ) if $deprecatedcatalyst_component_names;
2497 if (my ($type, $name) = _get_component_type_name($component)) {
2498 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
2501 $class->components->{ $component } = $class->setup_component($component);
2506 sub _get_component_type_name {
2507 my $component = shift;
2508 my @parts = split /::/, $component;
2510 while (my $type = shift @parts) {
2511 return ('controller', join '::', @parts)
2512 if $type =~ /^(c|controller)$/i;
2514 return ('model', join '::', @parts)
2515 if $type =~ /^(m|model)$/i;
2517 return ('view', join '::', @parts)
2518 if $type =~ /^(v|view)$/i;
2522 =head2 $c->locate_components( $setup_component_config )
2524 This method is meant to provide a list of component modules that should be
2525 setup for the application. By default, it will use L<Module::Pluggable>.
2527 Specify a C<setup_components> config option to pass additional options directly
2528 to L<Module::Pluggable>. To add additional search paths, specify a key named
2529 C<search_extra> as an array reference. Items in the array beginning with C<::>
2530 will have the application class name prepended to them.
2534 sub locate_components {
2538 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2539 my $extra = delete $config->{ search_extra } || [];
2541 push @paths, @$extra;
2543 my $locator = Module::Pluggable::Object->new(
2544 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2548 # XXX think about ditching this sort entirely
2549 my @comps = sort { length $a <=> length $b } $locator->plugins;
2554 =head2 $c->expand_component_module( $component, $setup_component_config )
2556 Components found by C<locate_components> will be passed to this method, which
2557 is expected to return a list of component (package) names to be set up.
2561 sub expand_component_module {
2562 my ($class, $module) = @_;
2563 return Devel::InnerPackage::list_packages( $module );
2566 =head2 $c->setup_component
2570 sub setup_component {
2571 my( $class, $component ) = @_;
2573 unless ( $component->can( 'COMPONENT' ) ) {
2577 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2578 my $config = $class->config->{ $suffix } || {};
2579 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2580 # methods also pass it. local to avoid pointlessly shitting in config
2581 # for the debug screen, as $component is already the key name.
2582 local $config->{catalyst_component_name} = $component;
2584 my $instance = eval { $component->COMPONENT( $class, $config ); };
2586 if ( my $error = $@ ) {
2588 Catalyst::Exception->throw(
2589 message => qq/Couldn't instantiate component "$component", "$error"/
2592 elsif (!blessed $instance) {
2593 my $metaclass = Moose::Util::find_meta($component);
2594 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2595 my $component_method_from = $method_meta->associated_metaclass->name;
2596 my $value = defined($instance) ? $instance : 'undef';
2597 Catalyst::Exception->throw(
2599 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2606 =head2 $c->setup_dispatcher
2612 sub setup_dispatcher {
2613 my ( $class, $dispatcher ) = @_;
2616 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2619 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2620 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2623 unless ($dispatcher) {
2624 $dispatcher = $class->dispatcher_class;
2627 Class::MOP::load_class($dispatcher);
2629 # dispatcher instance
2630 $class->dispatcher( $dispatcher->new );
2633 =head2 $c->setup_engine
2640 my ( $class, $engine ) = @_;
2643 $engine = 'Catalyst::Engine::' . $engine;
2646 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2647 $engine = 'Catalyst::Engine::' . $env;
2650 if ( $ENV{MOD_PERL} ) {
2651 my $meta = Class::MOP::get_metaclass_by_name($class);
2653 # create the apache method
2654 $meta->add_method('apache' => sub { shift->engine->apache });
2656 my ( $software, $version ) =
2657 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2660 $version =~ s/(\.[^.]+)\./$1/g;
2662 if ( $software eq 'mod_perl' ) {
2666 if ( $version >= 1.99922 ) {
2667 $engine = 'Catalyst::Engine::Apache2::MP20';
2670 elsif ( $version >= 1.9901 ) {
2671 $engine = 'Catalyst::Engine::Apache2::MP19';
2674 elsif ( $version >= 1.24 ) {
2675 $engine = 'Catalyst::Engine::Apache::MP13';
2679 Catalyst::Exception->throw( message =>
2680 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2685 # install the correct mod_perl handler
2686 if ( $version >= 1.9901 ) {
2687 *handler = sub : method {
2688 shift->handle_request(@_);
2692 *handler = sub ($$) { shift->handle_request(@_) };
2697 elsif ( $software eq 'Zeus-Perl' ) {
2698 $engine = 'Catalyst::Engine::Zeus';
2702 Catalyst::Exception->throw(
2703 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2708 $engine = $class->engine_class;
2711 Class::MOP::load_class($engine);
2713 # check for old engines that are no longer compatible
2715 if ( $engine->isa('Catalyst::Engine::Apache')
2716 && !Catalyst::Engine::Apache->VERSION )
2721 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2722 && Catalyst::Engine::Server->VERSION le '0.02' )
2727 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2728 && $engine->VERSION eq '0.01' )
2733 elsif ($engine->isa('Catalyst::Engine::Zeus')
2734 && $engine->VERSION eq '0.01' )
2740 Catalyst::Exception->throw( message =>
2741 qq/Engine "$engine" is not supported by this version of Catalyst/
2746 $class->engine( $engine->new );
2749 =head2 $c->setup_home
2751 Sets up the home directory.
2756 my ( $class, $home ) = @_;
2758 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2762 $home ||= Catalyst::Utils::home($class);
2765 #I remember recently being scolded for assigning config values like this
2766 $class->config->{home} ||= $home;
2767 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2771 =head2 $c->setup_log
2773 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2774 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2777 This method also installs a C<debug> method that returns a true value into the
2778 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2779 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2781 Note that if the log has already been setup, by either a previous call to
2782 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2783 that this method won't actually set up the log object.
2788 my ( $class, $levels ) = @_;
2791 $levels =~ s/^\s+//;
2792 $levels =~ s/\s+$//;
2793 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2795 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2796 if ( defined $env_debug ) {
2797 $levels{debug} = 1 if $env_debug; # Ugly!
2798 delete($levels{debug}) unless $env_debug;
2801 unless ( $class->log ) {
2802 $class->log( Catalyst::Log->new(keys %levels) );
2805 if ( $levels{debug} ) {
2806 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2807 $class->log->debug('Debug messages enabled');
2811 =head2 $c->setup_plugins
2817 =head2 $c->setup_stats
2819 Sets up timing statistics class.
2824 my ( $class, $stats ) = @_;
2826 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2828 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2829 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2830 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2831 $class->log->debug('Statistics enabled');
2836 =head2 $c->registered_plugins
2838 Returns a sorted list of the plugins which have either been stated in the
2839 import list or which have been added via C<< MyApp->plugin(@args); >>.
2841 If passed a given plugin name, it will report a boolean value indicating
2842 whether or not that plugin is loaded. A fully qualified name is required if
2843 the plugin name does not begin with C<Catalyst::Plugin::>.
2845 if ($c->registered_plugins('Some::Plugin')) {
2853 sub registered_plugins {
2855 return sort keys %{ $proto->_plugins } unless @_;
2857 return 1 if exists $proto->_plugins->{$plugin};
2858 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2861 sub _register_plugin {
2862 my ( $proto, $plugin, $instant ) = @_;
2863 my $class = ref $proto || $proto;
2865 Class::MOP::load_class( $plugin );
2866 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2867 if $plugin->isa( 'Catalyst::Component' );
2868 $proto->_plugins->{$plugin} = 1;
2870 my $meta = Class::MOP::get_metaclass_by_name($class);
2871 $meta->superclasses($plugin, $meta->superclasses);
2877 my ( $class, $plugins ) = @_;
2879 $class->_plugins( {} ) unless $class->_plugins;
2880 $plugins = Data::OptList::mkopt($plugins || []);
2883 [ Catalyst::Utils::resolve_namespace(
2884 $class . '::Plugin',
2885 'Catalyst::Plugin', $_->[0]
2891 for my $plugin ( reverse @plugins ) {
2892 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2893 my $meta = find_meta($plugin->[0]);
2894 next if $meta && $meta->isa('Moose::Meta::Role');
2896 $class->_register_plugin($plugin->[0]);
2900 map { $_->[0]->name, $_->[1] }
2901 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2902 map { [find_meta($_->[0]), $_->[1]] }
2905 Moose::Util::apply_all_roles(
2913 Returns an arrayref of the internal execution stack (actions that are
2914 currently executing).
2918 Returns the current timing statistics object. By default Catalyst uses
2919 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2920 L<< stats_class|/"$c->stats_class" >>.
2922 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2923 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2924 profile explicitly, although MyApp.pm still won't profile nor output anything
2927 =head2 $c->stats_class
2929 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2931 =head2 $c->use_stats
2933 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2935 Note that this is a static method, not an accessor and should be overridden
2936 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2943 =head2 $c->write( $data )
2945 Writes $data to the output stream. When using this method directly, you
2946 will need to manually set the C<Content-Length> header to the length of
2947 your output data, if known.
2954 # Finalize headers if someone manually writes output
2955 $c->finalize_headers;
2957 return $c->engine->write( $c, @_ );
2962 Returns the Catalyst version number. Mostly useful for "powered by"
2963 messages in template systems.
2967 sub version { return $Catalyst::VERSION }
2969 =head1 CONFIGURATION
2971 There are a number of 'base' config variables which can be set:
2977 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2981 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
2985 C<disable_component_resolution_regex_fallback> - Turns
2986 off the deprecated component resolution functionality so
2987 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
2988 are called then regex search will not be attempted on string values and
2989 instead C<undef> will be returned.
2993 C<home> - The application home directory. In an uninstalled application,
2994 this is the top level application directory. In an installed application,
2995 this will be the directory containing C<< MyApp.pm >>.
2999 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
3003 C<name> - The name of the application in debug messages and the debug and
3008 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
3009 until it is accessed. This allows you to (for example) check authentication (and reject
3010 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
3014 C<root> - The root directory for templates. Usually this is just a
3015 subdirectory of the home directory, but you can set it to change the
3016 templates to a different directory.
3020 C<search_extra> - Array reference passed to Module::Pluggable to for additional
3021 namespaces from which components will be loaded (and constructed and stored in
3022 C<< $c->components >>).
3026 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
3027 to be shown in hit debug tables in the test server.
3031 C<use_request_uri_for_path> - Controlls if the C<REQUEST_URI> or C<PATH_INFO> environment
3032 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
3033 for more information.
3037 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
3041 =head1 INTERNAL ACTIONS
3043 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
3044 C<_ACTION>, and C<_END>. These are by default not shown in the private
3045 action table, but you can make them visible with a config parameter.
3047 MyApp->config(show_internal_actions => 1);
3049 =head1 ON-DEMAND PARSER
3051 The request body is usually parsed at the beginning of a request,
3052 but if you want to handle input yourself, you can enable on-demand
3053 parsing with a config parameter.
3055 MyApp->config(parse_on_demand => 1);
3057 =head1 PROXY SUPPORT
3059 Many production servers operate using the common double-server approach,
3060 with a lightweight frontend web server passing requests to a larger
3061 backend server. An application running on the backend server must deal
3062 with two problems: the remote user always appears to be C<127.0.0.1> and
3063 the server's hostname will appear to be C<localhost> regardless of the
3064 virtual host that the user connected through.
3066 Catalyst will automatically detect this situation when you are running
3067 the frontend and backend servers on the same machine. The following
3068 changes are made to the request.
3070 $c->req->address is set to the user's real IP address, as read from
3071 the HTTP X-Forwarded-For header.
3073 The host value for $c->req->base and $c->req->uri is set to the real
3074 host, as read from the HTTP X-Forwarded-Host header.
3076 Additionally, you may be running your backend application on an insecure
3077 connection (port 80) while your frontend proxy is running under SSL. If there
3078 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
3079 tell Catalyst what port the frontend listens on. This will allow all URIs to
3080 be created properly.
3082 In the case of passing in:
3084 X-Forwarded-Port: 443
3086 All calls to C<uri_for> will result in an https link, as is expected.
3088 Obviously, your web server must support these headers for this to work.
3090 In a more complex server farm environment where you may have your
3091 frontend proxy server(s) on different machines, you will need to set a
3092 configuration option to tell Catalyst to read the proxied data from the
3095 MyApp->config(using_frontend_proxy => 1);
3097 If you do not wish to use the proxy support at all, you may set:
3099 MyApp->config(ignore_frontend_proxy => 1);
3101 =head1 THREAD SAFETY
3103 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3104 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3105 believe the Catalyst core to be thread-safe.
3107 If you plan to operate in a threaded environment, remember that all other
3108 modules you are using must also be thread-safe. Some modules, most notably
3109 L<DBD::SQLite>, are not thread-safe.
3115 Join #catalyst on irc.perl.org.
3119 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3120 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3124 http://catalyst.perl.org
3128 http://dev.catalyst.perl.org
3132 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3134 =head2 L<Catalyst::Manual> - The Catalyst Manual
3136 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3138 =head2 L<Catalyst::Engine> - Core engine
3140 =head2 L<Catalyst::Log> - Log class.
3142 =head2 L<Catalyst::Request> - Request object
3144 =head2 L<Catalyst::Response> - Response object
3146 =head2 L<Catalyst::Test> - The test suite.
3148 =head1 PROJECT FOUNDER
3150 sri: Sebastian Riedel <sri@cpan.org>
3156 acme: Leon Brocard <leon@astray.com>
3158 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3162 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3166 andyg: Andy Grundman <andy@hybridized.org>
3168 audreyt: Audrey Tang
3170 bricas: Brian Cassidy <bricas@cpan.org>
3172 Caelum: Rafael Kitover <rkitover@io.com>
3174 chansen: Christian Hansen
3176 chicks: Christopher Hicks
3178 Chisel Wright C<pause@herlpacker.co.uk>
3180 Danijel Milicevic C<me@danijel.de>
3182 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3184 David Naughton, C<naughton@umn.edu>
3188 dhoss: Devin Austin <dhoss@cpan.org>
3190 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3194 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3196 esskar: Sascha Kiefer
3198 fireartist: Carl Franks <cfranks@cpan.org>
3200 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3202 gabb: Danijel Milicevic
3206 Gavin Henry C<ghenry@perl.me.uk>
3210 groditi: Guillermo Roditi <groditi@gmail.com>
3212 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3214 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3216 jcamacho: Juan Camacho
3218 jester: Jesse Sheidlower C<jester@panix.com>
3220 jhannah: Jay Hannah <jay@jays.net>
3226 jon: Jon Schutz <jjschutz@cpan.org>
3228 Jonathan Rockway C<< <jrockway@cpan.org> >>
3230 Kieren Diment C<kd@totaldatasolution.com>
3232 konobi: Scott McWhirter <konobi@cpan.org>
3234 marcus: Marcus Ramberg <mramberg@cpan.org>
3236 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3238 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3242 naughton: David Naughton
3244 ningu: David Kamholz <dkamholz@cpan.org>
3246 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3248 numa: Dan Sully <daniel@cpan.org>
3254 omega: Andreas Marienborg
3256 Oleg Kostyuk <cub.uanic@gmail.com>
3258 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3260 rafl: Florian Ragwitz <rafl@debian.org>
3262 random: Roland Lammel <lammel@cpan.org>
3264 Robert Sedlacek C<< <rs@474.at> >>
3266 SpiceMan: Marcel Montes
3270 szbalint: Balint Szilakszi <szbalint@cpan.org>
3272 t0m: Tomas Doran <bobtfish@bobtfish.net>
3276 Viljo Marrandi C<vilts@yahoo.com>
3278 Will Hawes C<info@whawes.co.uk>
3280 willert: Sebastian Willert <willert@cpan.org>
3282 wreis: Wallace Reis <wallace@reis.org.br>
3284 Yuval Kogman, C<nothingmuch@woobling.org>
3286 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3288 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3292 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3296 This library is free software. You can redistribute it and/or modify it under
3297 the same terms as Perl itself.
3303 __PACKAGE__->meta->make_immutable;