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 sub _find_component_regexp {
540 my ( $c, $container, $name, $args ) = @_;
543 if $c->config->{disable_component_resolution_regex_fallback} && !ref $name;
545 my $appclass = ref $c || $c;
546 my $prefix = ucfirst $container->name;
547 my $p = substr $prefix, 0, 1;
549 my $query = ref $name ? $name : qr{$name}i;
550 $query =~ s/^${appclass}::($p|$prefix):://i;
552 my @comps = $container->get_service_list;
554 $container->resolve( service => $_, parameters => { context => $args } )
555 } grep { m/$query/ } @comps;
557 if (!ref $name && $result[0]) {
558 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
559 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
560 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
567 =head2 COMPONENT ACCESSORS
569 =head2 $c->controller($name)
571 Gets a L<Catalyst::Controller> instance by name.
573 $c->controller('Foo')->do_stuff;
575 If the name is omitted, will return the controller for the dispatched
578 If you want to search for controllers, pass in a regexp as the argument.
580 # find all controllers that start with Foo
581 my @foo_controllers = $c->controller(qr{^Foo});
587 my ( $c, $name, @args ) = @_;
588 my $container = $c->container->get_sub_container('controller');
592 return $c->container->get_component('controller', $name, \@args)
593 if $container->has_service($name) && !ref $name;
595 return $c->_find_component_regexp( $container, $name, \@args );
598 return $c->component( $c->action->class );
601 =head2 $c->model($name)
603 Gets a L<Catalyst::Model> instance by name.
605 $c->model('Foo')->do_stuff;
607 Any extra arguments are directly passed to ACCEPT_CONTEXT.
609 If the name is omitted, it will look for
610 - a model object in $c->stash->{current_model_instance}, then
611 - a model name in $c->stash->{current_model}, then
612 - a config setting 'default_model', or
613 - check if there is only one model, and return it if that's the case.
615 If you want to search for models, pass in a regexp as the argument.
617 # find all models that start with Foo
618 my @foo_models = $c->model(qr{^Foo});
623 my ( $c, $name, @args ) = @_;
624 my $appclass = ref($c) || $c;
625 my $container = $c->container->get_sub_container('model');
629 # Direct component hash lookup to avoid costly regexps
630 return $c->container->get_component('model', $name, \@args)
631 if ( !ref $name && $container->has_service($name));
633 return $c->_find_component_regexp( $container, $name, \@args );
637 return $c->stash->{current_model_instance}
638 if $c->stash->{current_model_instance};
639 return $c->model( $c->stash->{current_model} )
640 if $c->stash->{current_model};
642 return $c->model( $appclass->config->{default_model} )
643 if $appclass->config->{default_model};
645 # FIXME: will this still be mantained?
646 my( $comp, $rest ) = $container->get_service_list;
649 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
650 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
651 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
652 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
653 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
656 return $container->resolve( service => $comp, parameters => { context => \@args } );
660 =head2 $c->view($name)
662 Gets a L<Catalyst::View> instance by name.
664 $c->view('Foo')->do_stuff;
666 Any extra arguments are directly passed to ACCEPT_CONTEXT.
668 If the name is omitted, it will look for
669 - a view object in $c->stash->{current_view_instance}, then
670 - a view name in $c->stash->{current_view}, then
671 - a config setting 'default_view', or
672 - check if there is only one view, and return it if that's the case.
674 If you want to search for views, pass in a regexp as the argument.
676 # find all views that start with Foo
677 my @foo_views = $c->view(qr{^Foo});
682 my ( $c, $name, @args ) = @_;
683 my $appclass = ref($c) || $c;
684 my $container = $c->container->get_sub_container('view');
688 if ( !ref $name ) { # Direct component hash lookup to avoid costly regexps
689 if ( $container->has_service($name) ) {
690 return $c->container->get_component('view', $name, \@args);
693 $c->log->warn( "Attempted to use view '$name', but does not exist" );
697 return $c->_find_component_regexp( $container, $name, \@args );
701 return $c->stash->{current_view_instance}
702 if $c->stash->{current_view_instance};
703 return $c->view( $c->stash->{current_view} )
704 if $c->stash->{current_view};
706 return $c->view( $appclass->config->{default_view} )
707 if $appclass->config->{default_view};
709 my( $comp, $rest ) = $container->get_service_list;
712 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
713 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
714 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
715 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
716 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
719 return $container->resolve( service => $comp, parameters => { context => \@args } );
722 =head2 $c->controllers
724 Returns the available names which can be passed to $c->controller
730 return $c->container->get_sub_container('controller')->get_service_list;
735 Returns the available names which can be passed to $c->model
741 return $c->container->get_sub_container('model')->get_service_list;
747 Returns the available names which can be passed to $c->view
753 return $c->container->get_sub_container('view')->get_service_list;
756 =head2 $c->comp($name)
758 =head2 $c->component($name)
760 Gets a component object by name. This method is not recommended,
761 unless you want to get a specific component by full
762 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
763 should be used instead.
765 If C<$name> is a regexp, a list of components matched against the full
766 component name will be returned.
768 If Catalyst can't find a component by name, it will fallback to regex
769 matching by default. To disable this behaviour set
770 disable_component_resolution_regex_fallback to a true value.
772 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
777 my ( $c, $component, @args ) = @_;
780 my ($type, $name) = _get_component_type_name($component);
782 if ($type && $c->container->has_sub_container($type)) {
783 my $container = $c->container->get_sub_container($type);
785 if( !ref $component && $container->has_service($name) ) {
786 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
790 if $c->config->{disable_component_resolution_regex_fallback};
792 my $query = qr{$name}i;
793 my @components = $container->get_service_list;
794 my @result = grep { m{$query} } @components;
797 $c->log->warn( Carp::shortmess(qq(Found results for "${component}" using regexp fallback)) );
798 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
799 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
801 return $container->resolve( service => $result[0], parameters => { context => [$c, @args] } );
806 if $c->config->{disable_component_resolution_regex_fallback} && !ref $component;
808 # This is here so $c->comp( '::M::' ) works
809 my $query = ref $component ? $component : qr{$component}i;
811 for my $subcontainer_name (qw/model view controller/) {
812 my $subcontainer = $c->container->get_sub_container($subcontainer_name);
813 my @components = $subcontainer->get_service_list;
814 my @result = grep { m{$query} } @components;
817 return map { $subcontainer->resolve( service => $_, parameters => { context => [$c, @args] } ) } @result
820 $c->log->warn( Carp::shortmess(qq(Found results for "${component}" using regexp fallback)) );
821 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
822 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
824 return $subcontainer->resolve( service => $result[0], parameters => { context => [$c, @args] } );
828 # I would expect to return an empty list here, but that breaks back-compat
832 return sort keys %{ $c->components };
835 =head2 CLASS DATA AND HELPER CLASSES
839 Returns or takes a hashref containing the application's configuration.
841 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
843 You can also use a C<YAML>, C<XML> or L<Config::General> config file
844 like C<myapp.conf> in your applications home directory. See
845 L<Catalyst::Plugin::ConfigLoader>.
847 =head3 Cascading configuration
849 The config method is present on all Catalyst components, and configuration
850 will be merged when an application is started. Configuration loaded with
851 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
852 followed by configuration in your top level C<MyApp> class. These two
853 configurations are merged, and then configuration data whose hash key matches a
854 component name is merged with configuration for that component.
856 The configuration for a component is then passed to the C<new> method when a
857 component is constructed.
861 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
862 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
864 will mean that C<MyApp::Model::Foo> receives the following data when
867 MyApp::Model::Foo->new({
873 It's common practice to use a Moose attribute
874 on the receiving component to access the config value.
876 package MyApp::Model::Foo;
880 # this attr will receive 'baz' at construction time
886 You can then get the value 'baz' by calling $c->model('Foo')->bar
887 (or $self->bar inside code in the model).
889 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
890 as a way of reading config within your code, as this B<will not> give you the
891 correctly merged config back. You B<MUST> take the config values supplied to
892 the constructor and use those instead.
896 around config => sub {
900 croak('Setting config after setup has been run is not allowed.')
901 if ( @_ and $c->setup_finished );
908 Returns the logging object instance. Unless it is already set, Catalyst
909 sets this up with a L<Catalyst::Log> object. To use your own log class,
910 set the logger with the C<< __PACKAGE__->log >> method prior to calling
911 C<< __PACKAGE__->setup >>.
913 __PACKAGE__->log( MyLogger->new );
918 $c->log->info( 'Now logging with my own logger!' );
920 Your log class should implement the methods described in
926 Returns 1 if debug mode is enabled, 0 otherwise.
928 You can enable debug mode in several ways:
932 =item By calling myapp_server.pl with the -d flag
934 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
936 =item The -Debug option in your MyApp.pm
938 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
942 The first three also set the log level to 'debug'.
944 Calling C<< $c->debug(1) >> has no effect.
950 =head2 $c->dispatcher
952 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
956 Returns the engine instance. See L<Catalyst::Engine>.
959 =head2 UTILITY METHODS
961 =head2 $c->path_to(@path)
963 Merges C<@path> with C<< $c->config->{home} >> and returns a
964 L<Path::Class::Dir> object. Note you can usually use this object as
965 a filename, but sometimes you will have to explicitly stringify it
966 yourself by calling the C<< ->stringify >> method.
970 $c->path_to( 'db', 'sqlite.db' );
975 my ( $c, @path ) = @_;
976 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
977 if ( -d $path ) { return $path }
978 else { return Path::Class::File->new( $c->config->{home}, @path ) }
981 =head2 $c->plugin( $name, $class, @args )
983 Helper method for plugins. It creates a class data accessor/mutator and
984 loads and instantiates the given class.
986 MyApp->plugin( 'prototype', 'HTML::Prototype' );
988 $c->prototype->define_javascript_functions;
990 B<Note:> This method of adding plugins is deprecated. The ability
991 to add plugins like this B<will be removed> in a Catalyst 5.81.
992 Please do not use this functionality in new code.
997 my ( $class, $name, $plugin, @args ) = @_;
999 # See block comment in t/unit_core_plugin.t
1000 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
1002 $class->_register_plugin( $plugin, 1 );
1004 eval { $plugin->import };
1005 $class->mk_classdata($name);
1007 eval { $obj = $plugin->new(@args) };
1010 Catalyst::Exception->throw( message =>
1011 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1014 $class->$name($obj);
1015 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1021 Initializes the dispatcher and engine, loads any plugins, and loads the
1022 model, view, and controller components. You may also specify an array
1023 of plugins to load here, if you choose to not load them in the C<use
1027 MyApp->setup( qw/-Debug/ );
1032 my ( $class, @arguments ) = @_;
1033 croak('Running setup more than once')
1034 if ( $class->setup_finished );
1036 unless ( $class->isa('Catalyst') ) {
1038 Catalyst::Exception->throw(
1039 message => qq/'$class' does not inherit from Catalyst/ );
1042 if ( $class->arguments ) {
1043 @arguments = ( @arguments, @{ $class->arguments } );
1049 foreach (@arguments) {
1053 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1055 elsif (/^-(\w+)=?(.*)$/) {
1056 $flags->{ lc $1 } = $2;
1059 push @{ $flags->{plugins} }, $_;
1063 $class->setup_config();
1064 $class->setup_home( delete $flags->{home} );
1066 $class->setup_log( delete $flags->{log} );
1067 $class->setup_plugins( delete $flags->{plugins} );
1068 $class->setup_dispatcher( delete $flags->{dispatcher} );
1069 $class->setup_engine( delete $flags->{engine} );
1070 $class->setup_stats( delete $flags->{stats} );
1072 for my $flag ( sort keys %{$flags} ) {
1074 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1075 &$code( $class, delete $flags->{$flag} );
1078 $class->log->warn(qq/Unknown flag "$flag"/);
1082 eval { require Catalyst::Devel; };
1083 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1084 $class->log->warn(<<"EOF");
1085 You are running an old script!
1087 Please update by running (this will overwrite existing files):
1088 catalyst.pl -force -scripts $class
1090 or (this will not overwrite existing files):
1091 catalyst.pl -scripts $class
1096 if ( $class->debug ) {
1097 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1100 my $column_width = Catalyst::Utils::term_width() - 6;
1101 my $t = Text::SimpleTable->new($column_width);
1102 $t->row($_) for @plugins;
1103 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1106 my $dispatcher = $class->dispatcher;
1107 my $engine = $class->engine;
1108 my $home = $class->config->{home};
1110 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1111 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1115 ? $class->log->debug(qq/Found home "$home"/)
1116 : $class->log->debug(qq/Home "$home" doesn't exist/)
1117 : $class->log->debug(q/Couldn't find home/);
1120 # Call plugins setup, this is stupid and evil.
1121 # Also screws C3 badly on 5.10, hack to avoid.
1123 no warnings qw/redefine/;
1124 local *setup = sub { };
1125 $class->setup unless $Catalyst::__AM_RESTARTING;
1128 # Initialize our data structure
1129 $class->components( {} );
1131 $class->setup_components;
1133 if ( $class->debug ) {
1134 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1135 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1136 for my $comp ( sort keys %{ $class->components } ) {
1137 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1138 $t->row( $comp, $type );
1140 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1141 if ( keys %{ $class->components } );
1144 # Add our self to components, since we are also a component
1145 if( $class->isa('Catalyst::Controller') ){
1146 $class->components->{$class} = $class;
1149 $class->setup_actions;
1151 if ( $class->debug ) {
1152 my $name = $class->config->{name} || 'Application';
1153 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1156 # Make sure that the application class becomes immutable at this point,
1157 B::Hooks::EndOfScope::on_scope_end {
1159 my $meta = Class::MOP::get_metaclass_by_name($class);
1162 && ! { $meta->immutable_options }->{replace_constructor}
1164 $class->isa('Class::Accessor::Fast')
1165 || $class->isa('Class::Accessor')
1168 warn "You made your application class ($class) immutable, "
1169 . "but did not inline the\nconstructor. "
1170 . "This will break catalyst, as your app \@ISA "
1171 . "Class::Accessor(::Fast)?\nPlease pass "
1172 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1174 $meta->make_immutable(
1175 replace_constructor => 1,
1176 ) unless $meta->is_immutable;
1179 if ($class->config->{case_sensitive}) {
1180 $class->log->warn($class . "->config->{case_sensitive} is set.");
1181 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1184 $class->setup_finalize;
1185 # Should be the last thing we do so that user things hooking
1186 # setup_finalize can log..
1187 $class->log->_flush() if $class->log->can('_flush');
1188 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1191 =head2 $app->setup_finalize
1193 A hook to attach modifiers to. This method does not do anything except set the
1194 C<setup_finished> accessor.
1196 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1200 after setup_finalize => sub {
1208 sub setup_finalize {
1210 $class->setup_finished(1);
1213 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1215 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1217 Constructs an absolute L<URI> object based on the application root, the
1218 provided path, and the additional arguments and query parameters provided.
1219 When used as a string, provides a textual URI. If you need more flexibility
1220 than this (i.e. the option to provide relative URIs etc.) see
1221 L<Catalyst::Plugin::SmartURI>.
1223 If no arguments are provided, the URI for the current action is returned.
1224 To return the current action and also provide @args, use
1225 C<< $c->uri_for( $c->action, @args ) >>.
1227 If the first argument is a string, it is taken as a public URI path relative
1228 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1229 relative to the application root (if it does). It is then merged with
1230 C<< $c->request->base >>; any C<@args> are appended as additional path
1231 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1233 If the first argument is a L<Catalyst::Action> it represents an action which
1234 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1235 optional C<\@captures> argument (an arrayref) allows passing the captured
1236 variables that are needed to fill in the paths of Chained and Regex actions;
1237 once the path is resolved, C<uri_for> continues as though a path was
1238 provided, appending any arguments or parameters and creating an absolute
1241 The captures for the current request can be found in
1242 C<< $c->request->captures >>, and actions can be resolved using
1243 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1244 path, use C<< $c->uri_for_action >> instead.
1246 # Equivalent to $c->req->uri
1247 $c->uri_for($c->action, $c->req->captures,
1248 @{ $c->req->args }, $c->req->params);
1250 # For the Foo action in the Bar controller
1251 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1253 # Path to a static resource
1254 $c->uri_for('/static/images/logo.png');
1259 my ( $c, $path, @args ) = @_;
1261 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1262 $path = $path->path_prefix;
1267 undef($path) if (defined $path && $path eq '');
1270 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1272 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1273 foreach my $arg (@args) {
1274 utf8::encode($arg) if utf8::is_utf8($arg);
1275 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1278 if ( blessed($path) ) { # action object
1279 s|/|%2F|g for @args;
1280 my $captures = [ map { s|/|%2F|g; $_; }
1281 ( scalar @args && ref $args[0] eq 'ARRAY'
1285 foreach my $capture (@$captures) {
1286 utf8::encode($capture) if utf8::is_utf8($capture);
1287 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1291 $path = $c->dispatcher->uri_for_action($action, $captures);
1292 if (not defined $path) {
1293 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1297 $path = '/' if $path eq '';
1300 unshift(@args, $path);
1302 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1303 my $namespace = $c->namespace;
1304 if (defined $path) { # cheesy hack to handle path '../foo'
1305 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1307 unshift(@args, $namespace || '');
1310 # join args with '/', or a blank string
1311 my $args = join('/', grep { defined($_) } @args);
1312 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1314 my $base = $c->req->base;
1315 my $class = ref($base);
1316 $base =~ s{(?<!/)$}{/};
1320 if (my @keys = keys %$params) {
1321 # somewhat lifted from URI::_query's query_form
1322 $query = '?'.join('&', map {
1323 my $val = $params->{$_};
1324 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1327 $val = '' unless defined $val;
1330 utf8::encode( $param ) if utf8::is_utf8($param);
1331 # using the URI::Escape pattern here so utf8 chars survive
1332 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1334 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1338 my $res = bless(\"${base}${args}${query}", $class);
1342 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1344 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1350 A private path to the Catalyst action you want to create a URI for.
1352 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1353 >> and passing the resulting C<$action> and the remaining arguments to C<<
1356 You can also pass in a Catalyst::Action object, in which case it is passed to
1359 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.
1361 For example, if the action looks like:
1363 package MyApp::Controller::Users;
1365 sub lst : Path('the-list') {}
1369 $c->uri_for_action('/users/lst')
1371 and it will create the URI /users/the-list.
1377 sub uri_for_action {
1378 my ( $c, $path, @args ) = @_;
1379 my $action = blessed($path)
1381 : $c->dispatcher->get_action_by_path($path);
1382 unless (defined $action) {
1383 croak "Can't find action for path '$path'";
1385 return $c->uri_for( $action, @args );
1388 =head2 $c->welcome_message
1390 Returns the Catalyst welcome HTML page.
1394 sub welcome_message {
1396 my $name = $c->config->{name};
1397 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1398 my $prefix = Catalyst::Utils::appprefix( ref $c );
1399 $c->response->content_type('text/html; charset=utf-8');
1401 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1402 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1403 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1405 <meta http-equiv="Content-Language" content="en" />
1406 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1407 <title>$name on Catalyst $VERSION</title>
1408 <style type="text/css">
1411 background-color: #eee;
1418 margin-bottom: 10px;
1420 background-color: #ccc;
1421 border: 1px solid #aaa;
1426 font-family: verdana, tahoma, sans-serif;
1429 font-family: verdana, tahoma, sans-serif;
1432 text-decoration: none;
1434 border-bottom: 1px dotted #bbb;
1436 :link:hover, :visited:hover {
1449 background-color: #fff;
1450 border: 1px solid #aaa;
1454 font-weight: normal;
1476 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1481 <img src="$logo" alt="Catalyst Logo" />
1483 <p>Welcome to the world of Catalyst.
1484 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1485 framework will make web development something you had
1486 never expected it to be: Fun, rewarding, and quick.</p>
1487 <h2>What to do now?</h2>
1488 <p>That really depends on what <b>you</b> want to do.
1489 We do, however, provide you with a few starting points.</p>
1490 <p>If you want to jump right into web development with Catalyst
1491 you might want to start with a tutorial.</p>
1492 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1494 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1496 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1497 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1499 <h2>What to do next?</h2>
1500 <p>Next it's time to write an actual application. Use the
1501 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1502 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1503 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1504 they can save you a lot of work.</p>
1505 <pre><code>script/${prefix}_create.pl --help</code></pre>
1506 <p>Also, be sure to check out the vast and growing
1507 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1508 you are likely to find what you need there.
1512 <p>Catalyst has a very active community. Here are the main places to
1513 get in touch with us.</p>
1516 <a href="http://dev.catalyst.perl.org">Wiki</a>
1519 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1522 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1525 <h2>In conclusion</h2>
1526 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1527 as we enjoyed making it. Please contact us if you have ideas
1528 for improvement or other feedback.</p>
1536 =head1 INTERNAL METHODS
1538 These methods are not meant to be used by end users.
1540 =head2 $c->components
1542 Returns a hash of components.
1546 around components => sub {
1551 return $class->$orig if ( !$comps );
1553 # FIXME: should this ugly kludge exist?
1554 $class->setup_config unless defined $class->container;
1556 # FIXME: should there be a warning here, not to use this accessor to create the components?
1557 my $components = {};
1560 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
1562 for my $component ( keys %$comps ) {
1563 $components->{ $component } = $comps->{$component};
1565 my ($type, $name) = _get_component_type_name($component);
1567 # FIXME: shouldn't the service name be $name?
1568 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
1571 return $class->$orig($components);
1574 =head2 $c->context_class
1576 Returns or sets the context class.
1580 Returns a hashref containing coderefs and execution counts (needed for
1581 deep recursion detection).
1585 Returns the number of actions on the current internal execution stack.
1589 Dispatches a request to actions.
1593 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1595 =head2 $c->dispatcher_class
1597 Returns or sets the dispatcher class.
1599 =head2 $c->dump_these
1601 Returns a list of 2-element array references (name, structure) pairs
1602 that will be dumped on the error page in debug mode.
1608 [ Request => $c->req ],
1609 [ Response => $c->res ],
1610 [ Stash => $c->stash ],
1611 [ Config => $c->config ];
1614 =head2 $c->engine_class
1616 Returns or sets the engine class.
1618 =head2 $c->execute( $class, $coderef )
1620 Execute a coderef in given class and catch exceptions. Errors are available
1626 my ( $c, $class, $code ) = @_;
1627 $class = $c->component($class) || $class;
1630 if ( $c->depth >= $RECURSION ) {
1631 my $action = $code->reverse();
1632 $action = "/$action" unless $action =~ /->/;
1633 my $error = qq/Deep recursion detected calling "${action}"/;
1634 $c->log->error($error);
1640 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1642 push( @{ $c->stack }, $code );
1644 no warnings 'recursion';
1645 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1646 # I have no idea how, ergo $ret (which appears to fix the issue)
1647 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1649 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1651 my $last = pop( @{ $c->stack } );
1653 if ( my $error = $@ ) {
1654 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1655 $error->rethrow if $c->depth > 1;
1657 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1658 $error->rethrow if $c->depth > 0;
1661 unless ( ref $error ) {
1662 no warnings 'uninitialized';
1664 my $class = $last->class;
1665 my $name = $last->name;
1666 $error = qq/Caught exception in $class->$name "$error"/;
1675 sub _stats_start_execute {
1676 my ( $c, $code ) = @_;
1677 my $appclass = ref($c) || $c;
1678 return if ( ( $code->name =~ /^_.*/ )
1679 && ( !$appclass->config->{show_internal_actions} ) );
1681 my $action_name = $code->reverse();
1682 $c->counter->{$action_name}++;
1684 my $action = $action_name;
1685 $action = "/$action" unless $action =~ /->/;
1687 # determine if the call was the result of a forward
1688 # this is done by walking up the call stack and looking for a calling
1689 # sub of Catalyst::forward before the eval
1691 for my $index ( 2 .. 11 ) {
1693 if ( ( caller($index) )[0] eq 'Catalyst'
1694 && ( caller($index) )[3] eq '(eval)' );
1696 if ( ( caller($index) )[3] =~ /forward$/ ) {
1697 $callsub = ( caller($index) )[3];
1698 $action = "-> $action";
1703 my $uid = $action_name . $c->counter->{$action_name};
1705 # is this a root-level call or a forwarded call?
1706 if ( $callsub =~ /forward$/ ) {
1707 my $parent = $c->stack->[-1];
1709 # forward, locate the caller
1710 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1713 parent => "$parent" . $c->counter->{"$parent"},
1719 # forward with no caller may come from a plugin
1738 sub _stats_finish_execute {
1739 my ( $c, $info ) = @_;
1740 $c->stats->profile( end => $info );
1745 Finalizes the request.
1752 for my $error ( @{ $c->error } ) {
1753 $c->log->error($error);
1756 # Allow engine to handle finalize flow (for POE)
1757 my $engine = $c->engine;
1758 if ( my $code = $engine->can('finalize') ) {
1763 $c->finalize_uploads;
1766 if ( $#{ $c->error } >= 0 ) {
1770 $c->finalize_headers;
1773 if ( $c->request->method eq 'HEAD' ) {
1774 $c->response->body('');
1782 if ($c->use_stats) {
1783 my $elapsed = sprintf '%f', $c->stats->elapsed;
1784 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1786 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1789 return $c->response->status;
1792 =head2 $c->finalize_body
1798 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1800 =head2 $c->finalize_cookies
1806 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1808 =head2 $c->finalize_error
1814 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1816 =head2 $c->finalize_headers
1822 sub finalize_headers {
1825 my $response = $c->response; #accessor calls can add up?
1827 # Check if we already finalized headers
1828 return if $response->finalized_headers;
1831 if ( my $location = $response->redirect ) {
1832 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1833 $response->header( Location => $location );
1835 if ( !$response->has_body ) {
1836 # Add a default body if none is already present
1838 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1844 if ( defined $response->body && length $response->body && !$response->content_length ) {
1846 # get the length from a filehandle
1847 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1849 my $stat = stat $response->body;
1850 if ( $stat && $stat->size > 0 ) {
1851 $response->content_length( $stat->size );
1854 $c->log->warn('Serving filehandle without a content-length');
1858 # everything should be bytes at this point, but just in case
1859 $response->content_length( length( $response->body ) );
1864 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1865 $response->headers->remove_header("Content-Length");
1866 $response->body('');
1869 $c->finalize_cookies;
1871 $c->engine->finalize_headers( $c, @_ );
1874 $response->finalized_headers(1);
1877 =head2 $c->finalize_output
1879 An alias for finalize_body.
1881 =head2 $c->finalize_read
1883 Finalizes the input after reading is complete.
1887 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1889 =head2 $c->finalize_uploads
1891 Finalizes uploads. Cleans up any temporary files.
1895 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1897 =head2 $c->get_action( $action, $namespace )
1899 Gets an action in a given namespace.
1903 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1905 =head2 $c->get_actions( $action, $namespace )
1907 Gets all actions of a given name in a namespace and all parent
1912 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1914 =head2 $app->handle_request( @arguments )
1916 Called to handle each HTTP request.
1920 sub handle_request {
1921 my ( $class, @arguments ) = @_;
1923 # Always expect worst case!
1926 if ($class->debug) {
1927 my $secs = time - $START || 1;
1928 my $av = sprintf '%.3f', $COUNT / $secs;
1929 my $time = localtime time;
1930 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1933 my $c = $class->prepare(@arguments);
1935 $status = $c->finalize;
1938 if ( my $error = $@ ) {
1940 $class->log->error(qq/Caught exception in engine "$error"/);
1945 if(my $coderef = $class->log->can('_flush')){
1946 $class->log->$coderef();
1951 =head2 $c->prepare( @arguments )
1953 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1959 my ( $class, @arguments ) = @_;
1962 # After the app/ctxt split, this should become an attribute based on something passed
1963 # into the application.
1964 $class->context_class( ref $class || $class ) unless $class->context_class;
1966 my $c = $class->context_class->new({});
1968 # For on-demand data
1969 $c->request->_context($c);
1970 $c->response->_context($c);
1972 #surely this is not the most efficient way to do things...
1973 $c->stats($class->stats_class->new)->enable($c->use_stats);
1974 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
1975 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1978 #XXX reuse coderef from can
1979 # Allow engine to direct the prepare flow (for POE)
1980 if ( $c->engine->can('prepare') ) {
1981 $c->engine->prepare( $c, @arguments );
1984 $c->prepare_request(@arguments);
1985 $c->prepare_connection;
1986 $c->prepare_query_parameters;
1987 $c->prepare_headers;
1988 $c->prepare_cookies;
1991 # Prepare the body for reading, either by prepare_body
1992 # or the user, if they are using $c->read
1995 # Parse the body unless the user wants it on-demand
1996 unless ( ref($c)->config->{parse_on_demand} ) {
2001 my $method = $c->req->method || '';
2002 my $path = $c->req->path;
2003 $path = '/' unless length $path;
2004 my $address = $c->req->address || '';
2013 =head2 $c->prepare_action
2015 Prepares action. See L<Catalyst::Dispatcher>.
2019 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
2021 =head2 $c->prepare_body
2023 Prepares message body.
2030 return if $c->request->_has_body;
2032 # Initialize on-demand data
2033 $c->engine->prepare_body( $c, @_ );
2034 $c->prepare_parameters;
2035 $c->prepare_uploads;
2038 =head2 $c->prepare_body_chunk( $chunk )
2040 Prepares a chunk of data before sending it to L<HTTP::Body>.
2042 See L<Catalyst::Engine>.
2046 sub prepare_body_chunk {
2048 $c->engine->prepare_body_chunk( $c, @_ );
2051 =head2 $c->prepare_body_parameters
2053 Prepares body parameters.
2057 sub prepare_body_parameters {
2059 $c->engine->prepare_body_parameters( $c, @_ );
2062 =head2 $c->prepare_connection
2064 Prepares connection.
2068 sub prepare_connection {
2070 $c->engine->prepare_connection( $c, @_ );
2073 =head2 $c->prepare_cookies
2079 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2081 =head2 $c->prepare_headers
2087 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2089 =head2 $c->prepare_parameters
2091 Prepares parameters.
2095 sub prepare_parameters {
2097 $c->prepare_body_parameters;
2098 $c->engine->prepare_parameters( $c, @_ );
2101 =head2 $c->prepare_path
2103 Prepares path and base.
2107 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2109 =head2 $c->prepare_query_parameters
2111 Prepares query parameters.
2115 sub prepare_query_parameters {
2118 $c->engine->prepare_query_parameters( $c, @_ );
2121 =head2 $c->log_request
2123 Writes information about the request to the debug logs. This includes:
2127 =item * Request method, path, and remote IP address
2129 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2131 =item * Request parameters
2133 =item * File uploads
2142 return unless $c->debug;
2144 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2145 my $request = $dump->[1];
2147 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2149 $path = '/' unless length $path;
2151 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2153 $c->log_request_headers($request->headers);
2155 if ( my $keywords = $request->query_keywords ) {
2156 $c->log->debug("Query keywords are: $keywords");
2159 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2161 $c->log_request_uploads($request);
2164 =head2 $c->log_response
2166 Writes information about the response to the debug logs by calling
2167 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2174 return unless $c->debug;
2176 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2177 my $response = $dump->[1];
2179 $c->log_response_status_line($response);
2180 $c->log_response_headers($response->headers);
2183 =head2 $c->log_response_status_line($response)
2185 Writes one line of information about the response to the debug logs. This includes:
2189 =item * Response status code
2191 =item * Content-Type header (if present)
2193 =item * Content-Length header (if present)
2199 sub log_response_status_line {
2200 my ($c, $response) = @_;
2204 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2205 $response->status || 'unknown',
2206 $response->headers->header('Content-Type') || 'unknown',
2207 $response->headers->header('Content-Length') || 'unknown'
2212 =head2 $c->log_response_headers($headers);
2214 Hook method which can be wrapped by plugins to log the responseheaders.
2215 No-op in the default implementation.
2219 sub log_response_headers {}
2221 =head2 $c->log_request_parameters( query => {}, body => {} )
2223 Logs request parameters to debug logs
2227 sub log_request_parameters {
2229 my %all_params = @_;
2231 return unless $c->debug;
2233 my $column_width = Catalyst::Utils::term_width() - 44;
2234 foreach my $type (qw(query body)) {
2235 my $params = $all_params{$type};
2236 next if ! keys %$params;
2237 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2238 for my $key ( sort keys %$params ) {
2239 my $param = $params->{$key};
2240 my $value = defined($param) ? $param : '';
2241 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2243 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2247 =head2 $c->log_request_uploads
2249 Logs file uploads included in the request to the debug logs.
2250 The parameter name, filename, file type, and file size are all included in
2255 sub log_request_uploads {
2257 my $request = shift;
2258 return unless $c->debug;
2259 my $uploads = $request->uploads;
2260 if ( keys %$uploads ) {
2261 my $t = Text::SimpleTable->new(
2262 [ 12, 'Parameter' ],
2267 for my $key ( sort keys %$uploads ) {
2268 my $upload = $uploads->{$key};
2269 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2270 $t->row( $key, $u->filename, $u->type, $u->size );
2273 $c->log->debug( "File Uploads are:\n" . $t->draw );
2277 =head2 $c->log_request_headers($headers);
2279 Hook method which can be wrapped by plugins to log the request headers.
2280 No-op in the default implementation.
2284 sub log_request_headers {}
2286 =head2 $c->log_headers($type => $headers)
2288 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2295 my $headers = shift; # an HTTP::Headers instance
2297 return unless $c->debug;
2299 my $column_width = Catalyst::Utils::term_width() - 28;
2300 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2303 my ( $name, $value ) = @_;
2304 $t->row( $name, $value );
2307 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2311 =head2 $c->prepare_read
2313 Prepares the input for reading.
2317 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2319 =head2 $c->prepare_request
2321 Prepares the engine request.
2325 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2327 =head2 $c->prepare_uploads
2333 sub prepare_uploads {
2336 $c->engine->prepare_uploads( $c, @_ );
2339 =head2 $c->prepare_write
2341 Prepares the output for writing.
2345 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2347 =head2 $c->request_class
2349 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2351 =head2 $c->response_class
2353 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2355 =head2 $c->read( [$maxlength] )
2357 Reads a chunk of data from the request body. This method is designed to
2358 be used in a while loop, reading C<$maxlength> bytes on every call.
2359 C<$maxlength> defaults to the size of the request if not specified.
2361 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2364 Warning: If you use read(), Catalyst will not process the body,
2365 so you will not be able to access POST parameters or file uploads via
2366 $c->request. You must handle all body parsing yourself.
2370 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2378 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2380 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2382 Sets an action in a given namespace.
2386 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2388 =head2 $c->setup_actions($component)
2390 Sets up actions for a component.
2394 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2396 =head2 $c->setup_config
2403 my %args = %{ $class->config || {} };
2405 my @container_classes = ( "${class}::Container", 'Catalyst::Container');
2406 unshift @container_classes, delete $args{container_class} if exists $args{container_class};
2408 my $container_class = Class::MOP::load_first_existing_class(@container_classes);
2410 my $container = $container_class->new( %args, name => "$class" );
2411 $class->container($container);
2413 my $config = $container->resolve(service => 'config');
2414 $class->config($config);
2415 $class->finalize_config; # back-compat
2418 =head $c->finalize_config
2422 sub finalize_config { }
2424 =head2 $c->setup_components
2426 This method is called internally to set up the application's components.
2428 It finds modules by calling the L<locate_components> method, expands them to
2429 package names with the L<expand_component_module> method, and then installs
2430 each component into the application.
2432 The C<setup_components> config option is passed to both of the above methods.
2434 Installation of each component is performed by the L<setup_component> method,
2439 sub setup_components {
2442 my $config = $class->config->{ setup_components };
2444 my @comps = $class->locate_components($config);
2445 my %comps = map { $_ => 1 } @comps;
2447 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2448 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2449 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2450 ) if $deprecatedcatalyst_component_names;
2452 for my $component ( @comps ) {
2454 # We pass ignore_loaded here so that overlay files for (e.g.)
2455 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2456 # we know M::P::O found a file on disk so this is safe
2458 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2462 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
2464 for my $component (@comps) {
2465 my $instance = $class->components->{ $component } = $class->setup_component($component);
2466 if ( my ($type, $name) = _get_component_type_name($component) ) {
2467 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $instance } ));
2469 my @expanded_components = $instance->can('expand_modules')
2470 ? $instance->expand_modules( $component, $config )
2471 : $class->expand_component_module( $component, $config );
2472 for my $component (@expanded_components) {
2473 next if $comps{$component};
2475 $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components;
2476 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2477 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2478 ) if $deprecatedcatalyst_component_names;
2480 if (my ($type, $name) = _get_component_type_name($component)) {
2481 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
2484 $class->components->{ $component } = $class->setup_component($component);
2489 sub _get_component_type_name {
2490 my $component = shift;
2491 my @parts = split /::/, $component;
2493 while (my $type = shift @parts) {
2494 return ('controller', join '::', @parts)
2495 if $type =~ /^(c|controller)$/i;
2497 return ('model', join '::', @parts)
2498 if $type =~ /^(m|model)$/i;
2500 return ('view', join '::', @parts)
2501 if $type =~ /^(v|view)$/i;
2505 =head2 $c->locate_components( $setup_component_config )
2507 This method is meant to provide a list of component modules that should be
2508 setup for the application. By default, it will use L<Module::Pluggable>.
2510 Specify a C<setup_components> config option to pass additional options directly
2511 to L<Module::Pluggable>. To add additional search paths, specify a key named
2512 C<search_extra> as an array reference. Items in the array beginning with C<::>
2513 will have the application class name prepended to them.
2517 sub locate_components {
2521 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2522 my $extra = delete $config->{ search_extra } || [];
2524 push @paths, @$extra;
2526 my $locator = Module::Pluggable::Object->new(
2527 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2531 # XXX think about ditching this sort entirely
2532 my @comps = sort { length $a <=> length $b } $locator->plugins;
2537 =head2 $c->expand_component_module( $component, $setup_component_config )
2539 Components found by C<locate_components> will be passed to this method, which
2540 is expected to return a list of component (package) names to be set up.
2544 sub expand_component_module {
2545 my ($class, $module) = @_;
2546 return Devel::InnerPackage::list_packages( $module );
2549 =head2 $c->setup_component
2553 sub setup_component {
2554 my( $class, $component ) = @_;
2556 unless ( $component->can( 'COMPONENT' ) ) {
2560 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2561 my $config = $class->config->{ $suffix } || {};
2562 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2563 # methods also pass it. local to avoid pointlessly shitting in config
2564 # for the debug screen, as $component is already the key name.
2565 local $config->{catalyst_component_name} = $component;
2567 my $instance = eval { $component->COMPONENT( $class, $config ); };
2569 if ( my $error = $@ ) {
2571 Catalyst::Exception->throw(
2572 message => qq/Couldn't instantiate component "$component", "$error"/
2575 elsif (!blessed $instance) {
2576 my $metaclass = Moose::Util::find_meta($component);
2577 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2578 my $component_method_from = $method_meta->associated_metaclass->name;
2579 my $value = defined($instance) ? $instance : 'undef';
2580 Catalyst::Exception->throw(
2582 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2589 =head2 $c->setup_dispatcher
2595 sub setup_dispatcher {
2596 my ( $class, $dispatcher ) = @_;
2599 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2602 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2603 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2606 unless ($dispatcher) {
2607 $dispatcher = $class->dispatcher_class;
2610 Class::MOP::load_class($dispatcher);
2612 # dispatcher instance
2613 $class->dispatcher( $dispatcher->new );
2616 =head2 $c->setup_engine
2623 my ( $class, $engine ) = @_;
2626 $engine = 'Catalyst::Engine::' . $engine;
2629 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2630 $engine = 'Catalyst::Engine::' . $env;
2633 if ( $ENV{MOD_PERL} ) {
2634 my $meta = Class::MOP::get_metaclass_by_name($class);
2636 # create the apache method
2637 $meta->add_method('apache' => sub { shift->engine->apache });
2639 my ( $software, $version ) =
2640 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2643 $version =~ s/(\.[^.]+)\./$1/g;
2645 if ( $software eq 'mod_perl' ) {
2649 if ( $version >= 1.99922 ) {
2650 $engine = 'Catalyst::Engine::Apache2::MP20';
2653 elsif ( $version >= 1.9901 ) {
2654 $engine = 'Catalyst::Engine::Apache2::MP19';
2657 elsif ( $version >= 1.24 ) {
2658 $engine = 'Catalyst::Engine::Apache::MP13';
2662 Catalyst::Exception->throw( message =>
2663 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2668 # install the correct mod_perl handler
2669 if ( $version >= 1.9901 ) {
2670 *handler = sub : method {
2671 shift->handle_request(@_);
2675 *handler = sub ($$) { shift->handle_request(@_) };
2680 elsif ( $software eq 'Zeus-Perl' ) {
2681 $engine = 'Catalyst::Engine::Zeus';
2685 Catalyst::Exception->throw(
2686 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2691 $engine = $class->engine_class;
2694 Class::MOP::load_class($engine);
2696 # check for old engines that are no longer compatible
2698 if ( $engine->isa('Catalyst::Engine::Apache')
2699 && !Catalyst::Engine::Apache->VERSION )
2704 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2705 && Catalyst::Engine::Server->VERSION le '0.02' )
2710 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2711 && $engine->VERSION eq '0.01' )
2716 elsif ($engine->isa('Catalyst::Engine::Zeus')
2717 && $engine->VERSION eq '0.01' )
2723 Catalyst::Exception->throw( message =>
2724 qq/Engine "$engine" is not supported by this version of Catalyst/
2729 $class->engine( $engine->new );
2732 =head2 $c->setup_home
2734 Sets up the home directory.
2739 my ( $class, $home ) = @_;
2741 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2745 $home ||= Catalyst::Utils::home($class);
2748 #I remember recently being scolded for assigning config values like this
2749 $class->config->{home} ||= $home;
2750 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2754 =head2 $c->setup_log
2756 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2757 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2760 This method also installs a C<debug> method that returns a true value into the
2761 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2762 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2764 Note that if the log has already been setup, by either a previous call to
2765 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2766 that this method won't actually set up the log object.
2771 my ( $class, $levels ) = @_;
2774 $levels =~ s/^\s+//;
2775 $levels =~ s/\s+$//;
2776 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2778 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2779 if ( defined $env_debug ) {
2780 $levels{debug} = 1 if $env_debug; # Ugly!
2781 delete($levels{debug}) unless $env_debug;
2784 unless ( $class->log ) {
2785 $class->log( Catalyst::Log->new(keys %levels) );
2788 if ( $levels{debug} ) {
2789 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2790 $class->log->debug('Debug messages enabled');
2794 =head2 $c->setup_plugins
2800 =head2 $c->setup_stats
2802 Sets up timing statistics class.
2807 my ( $class, $stats ) = @_;
2809 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2811 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2812 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2813 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2814 $class->log->debug('Statistics enabled');
2819 =head2 $c->registered_plugins
2821 Returns a sorted list of the plugins which have either been stated in the
2822 import list or which have been added via C<< MyApp->plugin(@args); >>.
2824 If passed a given plugin name, it will report a boolean value indicating
2825 whether or not that plugin is loaded. A fully qualified name is required if
2826 the plugin name does not begin with C<Catalyst::Plugin::>.
2828 if ($c->registered_plugins('Some::Plugin')) {
2836 sub registered_plugins {
2838 return sort keys %{ $proto->_plugins } unless @_;
2840 return 1 if exists $proto->_plugins->{$plugin};
2841 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2844 sub _register_plugin {
2845 my ( $proto, $plugin, $instant ) = @_;
2846 my $class = ref $proto || $proto;
2848 Class::MOP::load_class( $plugin );
2849 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2850 if $plugin->isa( 'Catalyst::Component' );
2851 $proto->_plugins->{$plugin} = 1;
2853 my $meta = Class::MOP::get_metaclass_by_name($class);
2854 $meta->superclasses($plugin, $meta->superclasses);
2860 my ( $class, $plugins ) = @_;
2862 $class->_plugins( {} ) unless $class->_plugins;
2863 $plugins = Data::OptList::mkopt($plugins || []);
2866 [ Catalyst::Utils::resolve_namespace(
2867 $class . '::Plugin',
2868 'Catalyst::Plugin', $_->[0]
2874 for my $plugin ( reverse @plugins ) {
2875 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2876 my $meta = find_meta($plugin->[0]);
2877 next if $meta && $meta->isa('Moose::Meta::Role');
2879 $class->_register_plugin($plugin->[0]);
2883 map { $_->[0]->name, $_->[1] }
2884 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2885 map { [find_meta($_->[0]), $_->[1]] }
2888 Moose::Util::apply_all_roles(
2896 Returns an arrayref of the internal execution stack (actions that are
2897 currently executing).
2901 Returns the current timing statistics object. By default Catalyst uses
2902 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2903 L<< stats_class|/"$c->stats_class" >>.
2905 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2906 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2907 profile explicitly, although MyApp.pm still won't profile nor output anything
2910 =head2 $c->stats_class
2912 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2914 =head2 $c->use_stats
2916 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2918 Note that this is a static method, not an accessor and should be overridden
2919 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2926 =head2 $c->write( $data )
2928 Writes $data to the output stream. When using this method directly, you
2929 will need to manually set the C<Content-Length> header to the length of
2930 your output data, if known.
2937 # Finalize headers if someone manually writes output
2938 $c->finalize_headers;
2940 return $c->engine->write( $c, @_ );
2945 Returns the Catalyst version number. Mostly useful for "powered by"
2946 messages in template systems.
2950 sub version { return $Catalyst::VERSION }
2952 =head1 CONFIGURATION
2954 There are a number of 'base' config variables which can be set:
2960 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2964 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
2968 C<disable_component_resolution_regex_fallback> - Turns
2969 off the deprecated component resolution functionality so
2970 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
2971 are called then regex search will not be attempted on string values and
2972 instead C<undef> will be returned.
2976 C<home> - The application home directory. In an uninstalled application,
2977 this is the top level application directory. In an installed application,
2978 this will be the directory containing C<< MyApp.pm >>.
2982 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
2986 C<name> - The name of the application in debug messages and the debug and
2991 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
2992 until it is accessed. This allows you to (for example) check authentication (and reject
2993 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
2997 C<root> - The root directory for templates. Usually this is just a
2998 subdirectory of the home directory, but you can set it to change the
2999 templates to a different directory.
3003 C<search_extra> - Array reference passed to Module::Pluggable to for additional
3004 namespaces from which components will be loaded (and constructed and stored in
3005 C<< $c->components >>).
3009 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
3010 to be shown in hit debug tables in the test server.
3014 C<use_request_uri_for_path> - Controlls if the C<REQUEST_URI> or C<PATH_INFO> environment
3015 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
3016 for more information.
3020 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
3024 =head1 INTERNAL ACTIONS
3026 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
3027 C<_ACTION>, and C<_END>. These are by default not shown in the private
3028 action table, but you can make them visible with a config parameter.
3030 MyApp->config(show_internal_actions => 1);
3032 =head1 ON-DEMAND PARSER
3034 The request body is usually parsed at the beginning of a request,
3035 but if you want to handle input yourself, you can enable on-demand
3036 parsing with a config parameter.
3038 MyApp->config(parse_on_demand => 1);
3040 =head1 PROXY SUPPORT
3042 Many production servers operate using the common double-server approach,
3043 with a lightweight frontend web server passing requests to a larger
3044 backend server. An application running on the backend server must deal
3045 with two problems: the remote user always appears to be C<127.0.0.1> and
3046 the server's hostname will appear to be C<localhost> regardless of the
3047 virtual host that the user connected through.
3049 Catalyst will automatically detect this situation when you are running
3050 the frontend and backend servers on the same machine. The following
3051 changes are made to the request.
3053 $c->req->address is set to the user's real IP address, as read from
3054 the HTTP X-Forwarded-For header.
3056 The host value for $c->req->base and $c->req->uri is set to the real
3057 host, as read from the HTTP X-Forwarded-Host header.
3059 Additionally, you may be running your backend application on an insecure
3060 connection (port 80) while your frontend proxy is running under SSL. If there
3061 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
3062 tell Catalyst what port the frontend listens on. This will allow all URIs to
3063 be created properly.
3065 In the case of passing in:
3067 X-Forwarded-Port: 443
3069 All calls to C<uri_for> will result in an https link, as is expected.
3071 Obviously, your web server must support these headers for this to work.
3073 In a more complex server farm environment where you may have your
3074 frontend proxy server(s) on different machines, you will need to set a
3075 configuration option to tell Catalyst to read the proxied data from the
3078 MyApp->config(using_frontend_proxy => 1);
3080 If you do not wish to use the proxy support at all, you may set:
3082 MyApp->config(ignore_frontend_proxy => 1);
3084 =head1 THREAD SAFETY
3086 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3087 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3088 believe the Catalyst core to be thread-safe.
3090 If you plan to operate in a threaded environment, remember that all other
3091 modules you are using must also be thread-safe. Some modules, most notably
3092 L<DBD::SQLite>, are not thread-safe.
3098 Join #catalyst on irc.perl.org.
3102 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3103 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3107 http://catalyst.perl.org
3111 http://dev.catalyst.perl.org
3115 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3117 =head2 L<Catalyst::Manual> - The Catalyst Manual
3119 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3121 =head2 L<Catalyst::Engine> - Core engine
3123 =head2 L<Catalyst::Log> - Log class.
3125 =head2 L<Catalyst::Request> - Request object
3127 =head2 L<Catalyst::Response> - Response object
3129 =head2 L<Catalyst::Test> - The test suite.
3131 =head1 PROJECT FOUNDER
3133 sri: Sebastian Riedel <sri@cpan.org>
3139 acme: Leon Brocard <leon@astray.com>
3141 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3145 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3149 andyg: Andy Grundman <andy@hybridized.org>
3151 audreyt: Audrey Tang
3153 bricas: Brian Cassidy <bricas@cpan.org>
3155 Caelum: Rafael Kitover <rkitover@io.com>
3157 chansen: Christian Hansen
3159 chicks: Christopher Hicks
3161 Chisel Wright C<pause@herlpacker.co.uk>
3163 Danijel Milicevic C<me@danijel.de>
3165 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3167 David Naughton, C<naughton@umn.edu>
3171 dhoss: Devin Austin <dhoss@cpan.org>
3173 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3177 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3179 esskar: Sascha Kiefer
3181 fireartist: Carl Franks <cfranks@cpan.org>
3183 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3185 gabb: Danijel Milicevic
3189 Gavin Henry C<ghenry@perl.me.uk>
3193 groditi: Guillermo Roditi <groditi@gmail.com>
3195 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3197 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3199 jcamacho: Juan Camacho
3201 jester: Jesse Sheidlower C<jester@panix.com>
3203 jhannah: Jay Hannah <jay@jays.net>
3209 jon: Jon Schutz <jjschutz@cpan.org>
3211 Jonathan Rockway C<< <jrockway@cpan.org> >>
3213 Kieren Diment C<kd@totaldatasolution.com>
3215 konobi: Scott McWhirter <konobi@cpan.org>
3217 marcus: Marcus Ramberg <mramberg@cpan.org>
3219 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3221 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3225 naughton: David Naughton
3227 ningu: David Kamholz <dkamholz@cpan.org>
3229 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3231 numa: Dan Sully <daniel@cpan.org>
3237 omega: Andreas Marienborg
3239 Oleg Kostyuk <cub.uanic@gmail.com>
3241 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3243 rafl: Florian Ragwitz <rafl@debian.org>
3245 random: Roland Lammel <lammel@cpan.org>
3247 Robert Sedlacek C<< <rs@474.at> >>
3249 SpiceMan: Marcel Montes
3253 szbalint: Balint Szilakszi <szbalint@cpan.org>
3255 t0m: Tomas Doran <bobtfish@bobtfish.net>
3259 Viljo Marrandi C<vilts@yahoo.com>
3261 Will Hawes C<info@whawes.co.uk>
3263 willert: Sebastian Willert <willert@cpan.org>
3265 wreis: Wallace Reis <wallace@reis.org.br>
3267 Yuval Kogman, C<nothingmuch@woobling.org>
3269 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3271 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3275 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3279 This library is free software. You can redistribute it and/or modify it under
3280 the same terms as Perl itself.
3286 __PACKAGE__->meta->make_immutable;