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 $query = ref $name ? $name : qr{$name}i;
573 $query =~ s/^${appclass}::(C|Controller):://;
574 my @comps = $container->get_service_list;
577 push @result, $container->resolve( service => $_, parameters => { context => [ $c, @args ] } )
583 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
584 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
585 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
586 return shift @result;
595 return $c->component( $c->action->class );
598 =head2 $c->model($name)
600 Gets a L<Catalyst::Model> instance by name.
602 $c->model('Foo')->do_stuff;
604 Any extra arguments are directly passed to ACCEPT_CONTEXT.
606 If the name is omitted, it will look for
607 - a model object in $c->stash->{current_model_instance}, then
608 - a model name in $c->stash->{current_model}, then
609 - a config setting 'default_model', or
610 - check if there is only one model, and return it if that's the case.
612 If you want to search for models, pass in a regexp as the argument.
614 # find all models that start with Foo
615 my @foo_models = $c->model(qr{^Foo});
620 my ( $c, $name, @args ) = @_;
621 my $appclass = ref($c) || $c;
622 my $container = $c->container->get_sub_container('model');
625 if ( !ref $name && $container->has_service($name)) { # Direct component hash lookup to avoid costly regexps
626 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
630 if $c->config->{disable_component_resolution_regex_fallback} && !ref $name;
632 my $query = ref $name ? $name : qr{$name}i;
633 $query =~ s/^${appclass}::(M|Model):://;
634 my @comps = $container->get_service_list;
637 push @result, $container->resolve( service => $_, parameters => { context => [ $c, @args ] } )
643 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
644 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
645 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
646 return shift @result;
656 return $c->stash->{current_model_instance}
657 if $c->stash->{current_model_instance};
658 return $c->model( $c->stash->{current_model} )
659 if $c->stash->{current_model};
661 return $c->model( $appclass->config->{default_model} )
662 if $appclass->config->{default_model};
664 # FIXME: will this still be mantained?
665 my( $comp, $rest ) = $container->get_service_list;
668 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
669 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
670 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
671 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
672 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
675 return $container->resolve( service => $comp, parameters => { context => [ $c, @args ] } );
679 =head2 $c->view($name)
681 Gets a L<Catalyst::View> instance by name.
683 $c->view('Foo')->do_stuff;
685 Any extra arguments are directly passed to ACCEPT_CONTEXT.
687 If the name is omitted, it will look for
688 - a view object in $c->stash->{current_view_instance}, then
689 - a view name in $c->stash->{current_view}, then
690 - a config setting 'default_view', or
691 - check if there is only one view, and return it if that's the case.
693 If you want to search for views, pass in a regexp as the argument.
695 # find all views that start with Foo
696 my @foo_views = $c->view(qr{^Foo});
701 my ( $c, $name, @args ) = @_;
702 my $appclass = ref($c) || $c;
703 my $container = $c->container->get_sub_container('view');
706 if ( !ref $name ) { # Direct component hash lookup to avoid costly regexps
707 if ( $container->has_service($name) ) {
708 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
711 $c->log->warn( "Attempted to use view '$name', but does not exist" );
716 if $c->config->{disable_component_resolution_regex_fallback} && !ref $name;
718 my $query = ref $name ? $name : qr{$name}i;
719 $query =~ s/^${appclass}::(V|View):://;
720 my @comps = $container->get_service_list;
723 push @result, $container->resolve( service => $_, parameters => { context => [ $c, @args ] } )
729 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
730 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
731 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
732 return shift @result;
742 return $c->stash->{current_view_instance}
743 if $c->stash->{current_view_instance};
744 return $c->view( $c->stash->{current_view} )
745 if $c->stash->{current_view};
747 return $c->view( $appclass->config->{default_view} )
748 if $appclass->config->{default_view};
750 my( $comp, $rest ) = $container->get_service_list;
753 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
754 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
755 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
756 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
757 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
760 return $container->resolve( service => $comp, parameters => { context => [ $c, @args ] } );
763 =head2 $c->controllers
765 Returns the available names which can be passed to $c->controller
771 return $c->container->get_sub_container('controller')->get_service_list;
776 Returns the available names which can be passed to $c->model
782 return $c->container->get_sub_container('model')->get_service_list;
788 Returns the available names which can be passed to $c->view
794 return $c->container->get_sub_container('view')->get_service_list;
797 =head2 $c->comp($name)
799 =head2 $c->component($name)
801 Gets a component object by name. This method is not recommended,
802 unless you want to get a specific component by full
803 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
804 should be used instead.
806 If C<$name> is a regexp, a list of components matched against the full
807 component name will be returned.
809 If Catalyst can't find a component by name, it will fallback to regex
810 matching by default. To disable this behaviour set
811 disable_component_resolution_regex_fallback to a true value.
813 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
818 my ( $c, $component, @args ) = @_;
821 my ($type, $name) = _get_component_type_name($component);
823 if ($type && $c->container->has_sub_container($type)) {
824 my $container = $c->container->get_sub_container($type);
826 if( !ref $component && $container->has_service($name) ) {
827 return $container->resolve( service => $name, parameters => { context => [ $c, @args ] } );
831 if $c->config->{disable_component_resolution_regex_fallback};
833 my $query = qr{$name}i;
834 my @components = $container->get_service_list;
835 my @result = grep { m{$query} } @components;
838 $c->log->warn( Carp::shortmess(qq(Found results for "${component}" using regexp fallback)) );
839 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
840 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
842 return $container->resolve( service => $result[0], parameters => { context => [$c, @args] } );
847 if $c->config->{disable_component_resolution_regex_fallback} && !ref $component;
849 # This is here so $c->comp( '::M::' ) works
850 my $query = ref $component ? $component : qr{$component}i;
852 for my $subcontainer_name (qw/model view controller/) {
853 my $subcontainer = $c->container->get_sub_container($subcontainer_name);
854 my @components = $subcontainer->get_service_list;
855 my @result = grep { m{$query} } @components;
858 return map { $subcontainer->resolve( service => $_, parameters => { context => [$c, @args] } ) } @result
861 $c->log->warn( Carp::shortmess(qq(Found results for "${component}" using regexp fallback)) );
862 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
863 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
865 return $subcontainer->resolve( service => $result[0], parameters => { context => [$c, @args] } );
869 # I would expect to return an empty list here, but that breaks back-compat
873 return sort keys %{ $c->components };
876 =head2 CLASS DATA AND HELPER CLASSES
880 Returns or takes a hashref containing the application's configuration.
882 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
884 You can also use a C<YAML>, C<XML> or L<Config::General> config file
885 like C<myapp.conf> in your applications home directory. See
886 L<Catalyst::Plugin::ConfigLoader>.
888 =head3 Cascading configuration
890 The config method is present on all Catalyst components, and configuration
891 will be merged when an application is started. Configuration loaded with
892 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
893 followed by configuration in your top level C<MyApp> class. These two
894 configurations are merged, and then configuration data whose hash key matches a
895 component name is merged with configuration for that component.
897 The configuration for a component is then passed to the C<new> method when a
898 component is constructed.
902 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
903 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
905 will mean that C<MyApp::Model::Foo> receives the following data when
908 MyApp::Model::Foo->new({
914 It's common practice to use a Moose attribute
915 on the receiving component to access the config value.
917 package MyApp::Model::Foo;
921 # this attr will receive 'baz' at construction time
927 You can then get the value 'baz' by calling $c->model('Foo')->bar
928 (or $self->bar inside code in the model).
930 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
931 as a way of reading config within your code, as this B<will not> give you the
932 correctly merged config back. You B<MUST> take the config values supplied to
933 the constructor and use those instead.
937 around config => sub {
941 croak('Setting config after setup has been run is not allowed.')
942 if ( @_ and $c->setup_finished );
949 Returns the logging object instance. Unless it is already set, Catalyst
950 sets this up with a L<Catalyst::Log> object. To use your own log class,
951 set the logger with the C<< __PACKAGE__->log >> method prior to calling
952 C<< __PACKAGE__->setup >>.
954 __PACKAGE__->log( MyLogger->new );
959 $c->log->info( 'Now logging with my own logger!' );
961 Your log class should implement the methods described in
967 Returns 1 if debug mode is enabled, 0 otherwise.
969 You can enable debug mode in several ways:
973 =item By calling myapp_server.pl with the -d flag
975 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
977 =item The -Debug option in your MyApp.pm
979 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
983 The first three also set the log level to 'debug'.
985 Calling C<< $c->debug(1) >> has no effect.
991 =head2 $c->dispatcher
993 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
997 Returns the engine instance. See L<Catalyst::Engine>.
1000 =head2 UTILITY METHODS
1002 =head2 $c->path_to(@path)
1004 Merges C<@path> with C<< $c->config->{home} >> and returns a
1005 L<Path::Class::Dir> object. Note you can usually use this object as
1006 a filename, but sometimes you will have to explicitly stringify it
1007 yourself by calling the C<< ->stringify >> method.
1011 $c->path_to( 'db', 'sqlite.db' );
1016 my ( $c, @path ) = @_;
1017 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
1018 if ( -d $path ) { return $path }
1019 else { return Path::Class::File->new( $c->config->{home}, @path ) }
1022 =head2 $c->plugin( $name, $class, @args )
1024 Helper method for plugins. It creates a class data accessor/mutator and
1025 loads and instantiates the given class.
1027 MyApp->plugin( 'prototype', 'HTML::Prototype' );
1029 $c->prototype->define_javascript_functions;
1031 B<Note:> This method of adding plugins is deprecated. The ability
1032 to add plugins like this B<will be removed> in a Catalyst 5.81.
1033 Please do not use this functionality in new code.
1038 my ( $class, $name, $plugin, @args ) = @_;
1040 # See block comment in t/unit_core_plugin.t
1041 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
1043 $class->_register_plugin( $plugin, 1 );
1045 eval { $plugin->import };
1046 $class->mk_classdata($name);
1048 eval { $obj = $plugin->new(@args) };
1051 Catalyst::Exception->throw( message =>
1052 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1055 $class->$name($obj);
1056 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1062 Initializes the dispatcher and engine, loads any plugins, and loads the
1063 model, view, and controller components. You may also specify an array
1064 of plugins to load here, if you choose to not load them in the C<use
1068 MyApp->setup( qw/-Debug/ );
1073 my ( $class, @arguments ) = @_;
1074 croak('Running setup more than once')
1075 if ( $class->setup_finished );
1077 unless ( $class->isa('Catalyst') ) {
1079 Catalyst::Exception->throw(
1080 message => qq/'$class' does not inherit from Catalyst/ );
1083 if ( $class->arguments ) {
1084 @arguments = ( @arguments, @{ $class->arguments } );
1090 foreach (@arguments) {
1094 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1096 elsif (/^-(\w+)=?(.*)$/) {
1097 $flags->{ lc $1 } = $2;
1100 push @{ $flags->{plugins} }, $_;
1104 $class->setup_config();
1105 $class->setup_home( delete $flags->{home} );
1107 $class->setup_log( delete $flags->{log} );
1108 $class->setup_plugins( delete $flags->{plugins} );
1109 $class->setup_dispatcher( delete $flags->{dispatcher} );
1110 $class->setup_engine( delete $flags->{engine} );
1111 $class->setup_stats( delete $flags->{stats} );
1113 for my $flag ( sort keys %{$flags} ) {
1115 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1116 &$code( $class, delete $flags->{$flag} );
1119 $class->log->warn(qq/Unknown flag "$flag"/);
1123 eval { require Catalyst::Devel; };
1124 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1125 $class->log->warn(<<"EOF");
1126 You are running an old script!
1128 Please update by running (this will overwrite existing files):
1129 catalyst.pl -force -scripts $class
1131 or (this will not overwrite existing files):
1132 catalyst.pl -scripts $class
1137 if ( $class->debug ) {
1138 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1141 my $column_width = Catalyst::Utils::term_width() - 6;
1142 my $t = Text::SimpleTable->new($column_width);
1143 $t->row($_) for @plugins;
1144 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1147 my $dispatcher = $class->dispatcher;
1148 my $engine = $class->engine;
1149 my $home = $class->config->{home};
1151 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1152 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1156 ? $class->log->debug(qq/Found home "$home"/)
1157 : $class->log->debug(qq/Home "$home" doesn't exist/)
1158 : $class->log->debug(q/Couldn't find home/);
1161 # Call plugins setup, this is stupid and evil.
1162 # Also screws C3 badly on 5.10, hack to avoid.
1164 no warnings qw/redefine/;
1165 local *setup = sub { };
1166 $class->setup unless $Catalyst::__AM_RESTARTING;
1169 # Initialize our data structure
1170 $class->components( {} );
1172 $class->setup_components;
1174 if ( $class->debug ) {
1175 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1176 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1177 for my $comp ( sort keys %{ $class->components } ) {
1178 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1179 $t->row( $comp, $type );
1181 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1182 if ( keys %{ $class->components } );
1185 # Add our self to components, since we are also a component
1186 if( $class->isa('Catalyst::Controller') ){
1187 $class->components->{$class} = $class;
1190 $class->setup_actions;
1192 if ( $class->debug ) {
1193 my $name = $class->config->{name} || 'Application';
1194 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1197 # Make sure that the application class becomes immutable at this point,
1198 B::Hooks::EndOfScope::on_scope_end {
1200 my $meta = Class::MOP::get_metaclass_by_name($class);
1203 && ! { $meta->immutable_options }->{replace_constructor}
1205 $class->isa('Class::Accessor::Fast')
1206 || $class->isa('Class::Accessor')
1209 warn "You made your application class ($class) immutable, "
1210 . "but did not inline the\nconstructor. "
1211 . "This will break catalyst, as your app \@ISA "
1212 . "Class::Accessor(::Fast)?\nPlease pass "
1213 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1215 $meta->make_immutable(
1216 replace_constructor => 1,
1217 ) unless $meta->is_immutable;
1220 if ($class->config->{case_sensitive}) {
1221 $class->log->warn($class . "->config->{case_sensitive} is set.");
1222 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1225 $class->setup_finalize;
1226 # Should be the last thing we do so that user things hooking
1227 # setup_finalize can log..
1228 $class->log->_flush() if $class->log->can('_flush');
1229 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1232 =head2 $app->setup_finalize
1234 A hook to attach modifiers to. This method does not do anything except set the
1235 C<setup_finished> accessor.
1237 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1241 after setup_finalize => sub {
1249 sub setup_finalize {
1251 $class->setup_finished(1);
1254 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1256 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1258 Constructs an absolute L<URI> object based on the application root, the
1259 provided path, and the additional arguments and query parameters provided.
1260 When used as a string, provides a textual URI. If you need more flexibility
1261 than this (i.e. the option to provide relative URIs etc.) see
1262 L<Catalyst::Plugin::SmartURI>.
1264 If no arguments are provided, the URI for the current action is returned.
1265 To return the current action and also provide @args, use
1266 C<< $c->uri_for( $c->action, @args ) >>.
1268 If the first argument is a string, it is taken as a public URI path relative
1269 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1270 relative to the application root (if it does). It is then merged with
1271 C<< $c->request->base >>; any C<@args> are appended as additional path
1272 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1274 If the first argument is a L<Catalyst::Action> it represents an action which
1275 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1276 optional C<\@captures> argument (an arrayref) allows passing the captured
1277 variables that are needed to fill in the paths of Chained and Regex actions;
1278 once the path is resolved, C<uri_for> continues as though a path was
1279 provided, appending any arguments or parameters and creating an absolute
1282 The captures for the current request can be found in
1283 C<< $c->request->captures >>, and actions can be resolved using
1284 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1285 path, use C<< $c->uri_for_action >> instead.
1287 # Equivalent to $c->req->uri
1288 $c->uri_for($c->action, $c->req->captures,
1289 @{ $c->req->args }, $c->req->params);
1291 # For the Foo action in the Bar controller
1292 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1294 # Path to a static resource
1295 $c->uri_for('/static/images/logo.png');
1300 my ( $c, $path, @args ) = @_;
1302 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1303 $path = $path->path_prefix;
1308 undef($path) if (defined $path && $path eq '');
1311 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1313 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1314 foreach my $arg (@args) {
1315 utf8::encode($arg) if utf8::is_utf8($arg);
1316 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1319 if ( blessed($path) ) { # action object
1320 s|/|%2F|g for @args;
1321 my $captures = [ map { s|/|%2F|g; $_; }
1322 ( scalar @args && ref $args[0] eq 'ARRAY'
1326 foreach my $capture (@$captures) {
1327 utf8::encode($capture) if utf8::is_utf8($capture);
1328 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1332 $path = $c->dispatcher->uri_for_action($action, $captures);
1333 if (not defined $path) {
1334 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1338 $path = '/' if $path eq '';
1341 unshift(@args, $path);
1343 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1344 my $namespace = $c->namespace;
1345 if (defined $path) { # cheesy hack to handle path '../foo'
1346 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1348 unshift(@args, $namespace || '');
1351 # join args with '/', or a blank string
1352 my $args = join('/', grep { defined($_) } @args);
1353 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1355 my $base = $c->req->base;
1356 my $class = ref($base);
1357 $base =~ s{(?<!/)$}{/};
1361 if (my @keys = keys %$params) {
1362 # somewhat lifted from URI::_query's query_form
1363 $query = '?'.join('&', map {
1364 my $val = $params->{$_};
1365 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1368 $val = '' unless defined $val;
1371 utf8::encode( $param ) if utf8::is_utf8($param);
1372 # using the URI::Escape pattern here so utf8 chars survive
1373 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1375 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1379 my $res = bless(\"${base}${args}${query}", $class);
1383 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1385 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1391 A private path to the Catalyst action you want to create a URI for.
1393 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1394 >> and passing the resulting C<$action> and the remaining arguments to C<<
1397 You can also pass in a Catalyst::Action object, in which case it is passed to
1400 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.
1402 For example, if the action looks like:
1404 package MyApp::Controller::Users;
1406 sub lst : Path('the-list') {}
1410 $c->uri_for_action('/users/lst')
1412 and it will create the URI /users/the-list.
1418 sub uri_for_action {
1419 my ( $c, $path, @args ) = @_;
1420 my $action = blessed($path)
1422 : $c->dispatcher->get_action_by_path($path);
1423 unless (defined $action) {
1424 croak "Can't find action for path '$path'";
1426 return $c->uri_for( $action, @args );
1429 =head2 $c->welcome_message
1431 Returns the Catalyst welcome HTML page.
1435 sub welcome_message {
1437 my $name = $c->config->{name};
1438 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1439 my $prefix = Catalyst::Utils::appprefix( ref $c );
1440 $c->response->content_type('text/html; charset=utf-8');
1442 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1443 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1444 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1446 <meta http-equiv="Content-Language" content="en" />
1447 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1448 <title>$name on Catalyst $VERSION</title>
1449 <style type="text/css">
1452 background-color: #eee;
1459 margin-bottom: 10px;
1461 background-color: #ccc;
1462 border: 1px solid #aaa;
1467 font-family: verdana, tahoma, sans-serif;
1470 font-family: verdana, tahoma, sans-serif;
1473 text-decoration: none;
1475 border-bottom: 1px dotted #bbb;
1477 :link:hover, :visited:hover {
1490 background-color: #fff;
1491 border: 1px solid #aaa;
1495 font-weight: normal;
1517 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1522 <img src="$logo" alt="Catalyst Logo" />
1524 <p>Welcome to the world of Catalyst.
1525 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1526 framework will make web development something you had
1527 never expected it to be: Fun, rewarding, and quick.</p>
1528 <h2>What to do now?</h2>
1529 <p>That really depends on what <b>you</b> want to do.
1530 We do, however, provide you with a few starting points.</p>
1531 <p>If you want to jump right into web development with Catalyst
1532 you might want to start with a tutorial.</p>
1533 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1535 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1537 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1538 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1540 <h2>What to do next?</h2>
1541 <p>Next it's time to write an actual application. Use the
1542 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1543 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1544 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1545 they can save you a lot of work.</p>
1546 <pre><code>script/${prefix}_create.pl --help</code></pre>
1547 <p>Also, be sure to check out the vast and growing
1548 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1549 you are likely to find what you need there.
1553 <p>Catalyst has a very active community. Here are the main places to
1554 get in touch with us.</p>
1557 <a href="http://dev.catalyst.perl.org">Wiki</a>
1560 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1563 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1566 <h2>In conclusion</h2>
1567 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1568 as we enjoyed making it. Please contact us if you have ideas
1569 for improvement or other feedback.</p>
1577 =head1 INTERNAL METHODS
1579 These methods are not meant to be used by end users.
1581 =head2 $c->components
1583 Returns a hash of components.
1587 around components => sub {
1592 return $class->$orig if ( !$comps );
1594 # FIXME: should this ugly kludge exist?
1595 $class->setup_config unless defined $class->container;
1597 # FIXME: should there be a warning here, not to use this accessor to create the components?
1598 my $components = {};
1601 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
1603 for my $component ( keys %$comps ) {
1604 $components->{ $component } = $comps->{$component};
1606 my ($type, $name) = _get_component_type_name($component);
1608 # FIXME: shouldn't the service name be $name?
1609 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
1612 return $class->$orig($components);
1615 =head2 $c->context_class
1617 Returns or sets the context class.
1621 Returns a hashref containing coderefs and execution counts (needed for
1622 deep recursion detection).
1626 Returns the number of actions on the current internal execution stack.
1630 Dispatches a request to actions.
1634 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1636 =head2 $c->dispatcher_class
1638 Returns or sets the dispatcher class.
1640 =head2 $c->dump_these
1642 Returns a list of 2-element array references (name, structure) pairs
1643 that will be dumped on the error page in debug mode.
1649 [ Request => $c->req ],
1650 [ Response => $c->res ],
1651 [ Stash => $c->stash ],
1652 [ Config => $c->config ];
1655 =head2 $c->engine_class
1657 Returns or sets the engine class.
1659 =head2 $c->execute( $class, $coderef )
1661 Execute a coderef in given class and catch exceptions. Errors are available
1667 my ( $c, $class, $code ) = @_;
1668 $class = $c->component($class) || $class;
1671 if ( $c->depth >= $RECURSION ) {
1672 my $action = $code->reverse();
1673 $action = "/$action" unless $action =~ /->/;
1674 my $error = qq/Deep recursion detected calling "${action}"/;
1675 $c->log->error($error);
1681 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1683 push( @{ $c->stack }, $code );
1685 no warnings 'recursion';
1686 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1687 # I have no idea how, ergo $ret (which appears to fix the issue)
1688 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1690 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1692 my $last = pop( @{ $c->stack } );
1694 if ( my $error = $@ ) {
1695 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1696 $error->rethrow if $c->depth > 1;
1698 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1699 $error->rethrow if $c->depth > 0;
1702 unless ( ref $error ) {
1703 no warnings 'uninitialized';
1705 my $class = $last->class;
1706 my $name = $last->name;
1707 $error = qq/Caught exception in $class->$name "$error"/;
1716 sub _stats_start_execute {
1717 my ( $c, $code ) = @_;
1718 my $appclass = ref($c) || $c;
1719 return if ( ( $code->name =~ /^_.*/ )
1720 && ( !$appclass->config->{show_internal_actions} ) );
1722 my $action_name = $code->reverse();
1723 $c->counter->{$action_name}++;
1725 my $action = $action_name;
1726 $action = "/$action" unless $action =~ /->/;
1728 # determine if the call was the result of a forward
1729 # this is done by walking up the call stack and looking for a calling
1730 # sub of Catalyst::forward before the eval
1732 for my $index ( 2 .. 11 ) {
1734 if ( ( caller($index) )[0] eq 'Catalyst'
1735 && ( caller($index) )[3] eq '(eval)' );
1737 if ( ( caller($index) )[3] =~ /forward$/ ) {
1738 $callsub = ( caller($index) )[3];
1739 $action = "-> $action";
1744 my $uid = $action_name . $c->counter->{$action_name};
1746 # is this a root-level call or a forwarded call?
1747 if ( $callsub =~ /forward$/ ) {
1748 my $parent = $c->stack->[-1];
1750 # forward, locate the caller
1751 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1754 parent => "$parent" . $c->counter->{"$parent"},
1760 # forward with no caller may come from a plugin
1779 sub _stats_finish_execute {
1780 my ( $c, $info ) = @_;
1781 $c->stats->profile( end => $info );
1786 Finalizes the request.
1793 for my $error ( @{ $c->error } ) {
1794 $c->log->error($error);
1797 # Allow engine to handle finalize flow (for POE)
1798 my $engine = $c->engine;
1799 if ( my $code = $engine->can('finalize') ) {
1804 $c->finalize_uploads;
1807 if ( $#{ $c->error } >= 0 ) {
1811 $c->finalize_headers;
1814 if ( $c->request->method eq 'HEAD' ) {
1815 $c->response->body('');
1823 if ($c->use_stats) {
1824 my $elapsed = sprintf '%f', $c->stats->elapsed;
1825 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1827 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1830 return $c->response->status;
1833 =head2 $c->finalize_body
1839 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1841 =head2 $c->finalize_cookies
1847 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1849 =head2 $c->finalize_error
1855 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1857 =head2 $c->finalize_headers
1863 sub finalize_headers {
1866 my $response = $c->response; #accessor calls can add up?
1868 # Check if we already finalized headers
1869 return if $response->finalized_headers;
1872 if ( my $location = $response->redirect ) {
1873 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1874 $response->header( Location => $location );
1876 if ( !$response->has_body ) {
1877 # Add a default body if none is already present
1879 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1885 if ( defined $response->body && length $response->body && !$response->content_length ) {
1887 # get the length from a filehandle
1888 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1890 my $stat = stat $response->body;
1891 if ( $stat && $stat->size > 0 ) {
1892 $response->content_length( $stat->size );
1895 $c->log->warn('Serving filehandle without a content-length');
1899 # everything should be bytes at this point, but just in case
1900 $response->content_length( length( $response->body ) );
1905 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1906 $response->headers->remove_header("Content-Length");
1907 $response->body('');
1910 $c->finalize_cookies;
1912 $c->engine->finalize_headers( $c, @_ );
1915 $response->finalized_headers(1);
1918 =head2 $c->finalize_output
1920 An alias for finalize_body.
1922 =head2 $c->finalize_read
1924 Finalizes the input after reading is complete.
1928 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1930 =head2 $c->finalize_uploads
1932 Finalizes uploads. Cleans up any temporary files.
1936 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1938 =head2 $c->get_action( $action, $namespace )
1940 Gets an action in a given namespace.
1944 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1946 =head2 $c->get_actions( $action, $namespace )
1948 Gets all actions of a given name in a namespace and all parent
1953 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1955 =head2 $app->handle_request( @arguments )
1957 Called to handle each HTTP request.
1961 sub handle_request {
1962 my ( $class, @arguments ) = @_;
1964 # Always expect worst case!
1967 if ($class->debug) {
1968 my $secs = time - $START || 1;
1969 my $av = sprintf '%.3f', $COUNT / $secs;
1970 my $time = localtime time;
1971 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1974 my $c = $class->prepare(@arguments);
1976 $status = $c->finalize;
1979 if ( my $error = $@ ) {
1981 $class->log->error(qq/Caught exception in engine "$error"/);
1986 if(my $coderef = $class->log->can('_flush')){
1987 $class->log->$coderef();
1992 =head2 $c->prepare( @arguments )
1994 Creates a Catalyst context from an engine-specific request (Apache, CGI,
2000 my ( $class, @arguments ) = @_;
2003 # After the app/ctxt split, this should become an attribute based on something passed
2004 # into the application.
2005 $class->context_class( ref $class || $class ) unless $class->context_class;
2007 my $c = $class->context_class->new({});
2009 # For on-demand data
2010 $c->request->_context($c);
2011 $c->response->_context($c);
2013 #surely this is not the most efficient way to do things...
2014 $c->stats($class->stats_class->new)->enable($c->use_stats);
2015 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
2016 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
2019 #XXX reuse coderef from can
2020 # Allow engine to direct the prepare flow (for POE)
2021 if ( $c->engine->can('prepare') ) {
2022 $c->engine->prepare( $c, @arguments );
2025 $c->prepare_request(@arguments);
2026 $c->prepare_connection;
2027 $c->prepare_query_parameters;
2028 $c->prepare_headers;
2029 $c->prepare_cookies;
2032 # Prepare the body for reading, either by prepare_body
2033 # or the user, if they are using $c->read
2036 # Parse the body unless the user wants it on-demand
2037 unless ( ref($c)->config->{parse_on_demand} ) {
2042 my $method = $c->req->method || '';
2043 my $path = $c->req->path;
2044 $path = '/' unless length $path;
2045 my $address = $c->req->address || '';
2054 =head2 $c->prepare_action
2056 Prepares action. See L<Catalyst::Dispatcher>.
2060 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
2062 =head2 $c->prepare_body
2064 Prepares message body.
2071 return if $c->request->_has_body;
2073 # Initialize on-demand data
2074 $c->engine->prepare_body( $c, @_ );
2075 $c->prepare_parameters;
2076 $c->prepare_uploads;
2079 =head2 $c->prepare_body_chunk( $chunk )
2081 Prepares a chunk of data before sending it to L<HTTP::Body>.
2083 See L<Catalyst::Engine>.
2087 sub prepare_body_chunk {
2089 $c->engine->prepare_body_chunk( $c, @_ );
2092 =head2 $c->prepare_body_parameters
2094 Prepares body parameters.
2098 sub prepare_body_parameters {
2100 $c->engine->prepare_body_parameters( $c, @_ );
2103 =head2 $c->prepare_connection
2105 Prepares connection.
2109 sub prepare_connection {
2111 $c->engine->prepare_connection( $c, @_ );
2114 =head2 $c->prepare_cookies
2120 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2122 =head2 $c->prepare_headers
2128 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2130 =head2 $c->prepare_parameters
2132 Prepares parameters.
2136 sub prepare_parameters {
2138 $c->prepare_body_parameters;
2139 $c->engine->prepare_parameters( $c, @_ );
2142 =head2 $c->prepare_path
2144 Prepares path and base.
2148 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2150 =head2 $c->prepare_query_parameters
2152 Prepares query parameters.
2156 sub prepare_query_parameters {
2159 $c->engine->prepare_query_parameters( $c, @_ );
2162 =head2 $c->log_request
2164 Writes information about the request to the debug logs. This includes:
2168 =item * Request method, path, and remote IP address
2170 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2172 =item * Request parameters
2174 =item * File uploads
2183 return unless $c->debug;
2185 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2186 my $request = $dump->[1];
2188 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2190 $path = '/' unless length $path;
2192 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2194 $c->log_request_headers($request->headers);
2196 if ( my $keywords = $request->query_keywords ) {
2197 $c->log->debug("Query keywords are: $keywords");
2200 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2202 $c->log_request_uploads($request);
2205 =head2 $c->log_response
2207 Writes information about the response to the debug logs by calling
2208 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2215 return unless $c->debug;
2217 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2218 my $response = $dump->[1];
2220 $c->log_response_status_line($response);
2221 $c->log_response_headers($response->headers);
2224 =head2 $c->log_response_status_line($response)
2226 Writes one line of information about the response to the debug logs. This includes:
2230 =item * Response status code
2232 =item * Content-Type header (if present)
2234 =item * Content-Length header (if present)
2240 sub log_response_status_line {
2241 my ($c, $response) = @_;
2245 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2246 $response->status || 'unknown',
2247 $response->headers->header('Content-Type') || 'unknown',
2248 $response->headers->header('Content-Length') || 'unknown'
2253 =head2 $c->log_response_headers($headers);
2255 Hook method which can be wrapped by plugins to log the responseheaders.
2256 No-op in the default implementation.
2260 sub log_response_headers {}
2262 =head2 $c->log_request_parameters( query => {}, body => {} )
2264 Logs request parameters to debug logs
2268 sub log_request_parameters {
2270 my %all_params = @_;
2272 return unless $c->debug;
2274 my $column_width = Catalyst::Utils::term_width() - 44;
2275 foreach my $type (qw(query body)) {
2276 my $params = $all_params{$type};
2277 next if ! keys %$params;
2278 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2279 for my $key ( sort keys %$params ) {
2280 my $param = $params->{$key};
2281 my $value = defined($param) ? $param : '';
2282 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2284 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2288 =head2 $c->log_request_uploads
2290 Logs file uploads included in the request to the debug logs.
2291 The parameter name, filename, file type, and file size are all included in
2296 sub log_request_uploads {
2298 my $request = shift;
2299 return unless $c->debug;
2300 my $uploads = $request->uploads;
2301 if ( keys %$uploads ) {
2302 my $t = Text::SimpleTable->new(
2303 [ 12, 'Parameter' ],
2308 for my $key ( sort keys %$uploads ) {
2309 my $upload = $uploads->{$key};
2310 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2311 $t->row( $key, $u->filename, $u->type, $u->size );
2314 $c->log->debug( "File Uploads are:\n" . $t->draw );
2318 =head2 $c->log_request_headers($headers);
2320 Hook method which can be wrapped by plugins to log the request headers.
2321 No-op in the default implementation.
2325 sub log_request_headers {}
2327 =head2 $c->log_headers($type => $headers)
2329 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2336 my $headers = shift; # an HTTP::Headers instance
2338 return unless $c->debug;
2340 my $column_width = Catalyst::Utils::term_width() - 28;
2341 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2344 my ( $name, $value ) = @_;
2345 $t->row( $name, $value );
2348 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2352 =head2 $c->prepare_read
2354 Prepares the input for reading.
2358 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2360 =head2 $c->prepare_request
2362 Prepares the engine request.
2366 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2368 =head2 $c->prepare_uploads
2374 sub prepare_uploads {
2377 $c->engine->prepare_uploads( $c, @_ );
2380 =head2 $c->prepare_write
2382 Prepares the output for writing.
2386 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2388 =head2 $c->request_class
2390 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2392 =head2 $c->response_class
2394 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2396 =head2 $c->read( [$maxlength] )
2398 Reads a chunk of data from the request body. This method is designed to
2399 be used in a while loop, reading C<$maxlength> bytes on every call.
2400 C<$maxlength> defaults to the size of the request if not specified.
2402 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2405 Warning: If you use read(), Catalyst will not process the body,
2406 so you will not be able to access POST parameters or file uploads via
2407 $c->request. You must handle all body parsing yourself.
2411 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2419 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2421 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2423 Sets an action in a given namespace.
2427 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2429 =head2 $c->setup_actions($component)
2431 Sets up actions for a component.
2435 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2437 =head2 $c->setup_config
2444 my %args = %{ $class->config || {} };
2446 my @container_classes = ( "${class}::Container", 'Catalyst::Container');
2447 unshift @container_classes, delete $args{container_class} if exists $args{container_class};
2449 my $container_class = Class::MOP::load_first_existing_class(@container_classes);
2451 my $container = $container_class->new( %args, name => "$class" );
2452 $class->container($container);
2454 my $config = $container->resolve(service => 'config');
2455 $class->config($config);
2456 $class->finalize_config; # back-compat
2459 =head $c->finalize_config
2463 sub finalize_config { }
2465 =head2 $c->setup_components
2467 This method is called internally to set up the application's components.
2469 It finds modules by calling the L<locate_components> method, expands them to
2470 package names with the L<expand_component_module> method, and then installs
2471 each component into the application.
2473 The C<setup_components> config option is passed to both of the above methods.
2475 Installation of each component is performed by the L<setup_component> method,
2480 sub setup_components {
2483 my $config = $class->config->{ setup_components };
2485 my @comps = $class->locate_components($config);
2486 my %comps = map { $_ => 1 } @comps;
2488 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2489 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2490 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2491 ) if $deprecatedcatalyst_component_names;
2493 for my $component ( @comps ) {
2495 # We pass ignore_loaded here so that overlay files for (e.g.)
2496 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2497 # we know M::P::O found a file on disk so this is safe
2499 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2503 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
2505 for my $component (@comps) {
2506 my $instance = $class->components->{ $component } = $class->setup_component($component);
2507 if ( my ($type, $name) = _get_component_type_name($component) ) {
2508 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $instance } ));
2510 my @expanded_components = $instance->can('expand_modules')
2511 ? $instance->expand_modules( $component, $config )
2512 : $class->expand_component_module( $component, $config );
2513 for my $component (@expanded_components) {
2514 next if $comps{$component};
2516 $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components;
2517 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2518 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2519 ) if $deprecatedcatalyst_component_names;
2521 if (my ($type, $name) = _get_component_type_name($component)) {
2522 $containers->{$type}->add_service(Catalyst::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
2525 $class->components->{ $component } = $class->setup_component($component);
2530 sub _get_component_type_name {
2531 my $component = shift;
2532 my @parts = split /::/, $component;
2534 while (my $type = shift @parts) {
2535 return ('controller', join '::', @parts)
2536 if $type =~ /^(c|controller)$/i;
2538 return ('model', join '::', @parts)
2539 if $type =~ /^(m|model)$/i;
2541 return ('view', join '::', @parts)
2542 if $type =~ /^(v|view)$/i;
2546 =head2 $c->locate_components( $setup_component_config )
2548 This method is meant to provide a list of component modules that should be
2549 setup for the application. By default, it will use L<Module::Pluggable>.
2551 Specify a C<setup_components> config option to pass additional options directly
2552 to L<Module::Pluggable>. To add additional search paths, specify a key named
2553 C<search_extra> as an array reference. Items in the array beginning with C<::>
2554 will have the application class name prepended to them.
2558 sub locate_components {
2562 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2563 my $extra = delete $config->{ search_extra } || [];
2565 push @paths, @$extra;
2567 my $locator = Module::Pluggable::Object->new(
2568 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2572 # XXX think about ditching this sort entirely
2573 my @comps = sort { length $a <=> length $b } $locator->plugins;
2578 =head2 $c->expand_component_module( $component, $setup_component_config )
2580 Components found by C<locate_components> will be passed to this method, which
2581 is expected to return a list of component (package) names to be set up.
2585 sub expand_component_module {
2586 my ($class, $module) = @_;
2587 return Devel::InnerPackage::list_packages( $module );
2590 =head2 $c->setup_component
2594 sub setup_component {
2595 my( $class, $component ) = @_;
2597 unless ( $component->can( 'COMPONENT' ) ) {
2601 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2602 my $config = $class->config->{ $suffix } || {};
2603 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2604 # methods also pass it. local to avoid pointlessly shitting in config
2605 # for the debug screen, as $component is already the key name.
2606 local $config->{catalyst_component_name} = $component;
2608 my $instance = eval { $component->COMPONENT( $class, $config ); };
2610 if ( my $error = $@ ) {
2612 Catalyst::Exception->throw(
2613 message => qq/Couldn't instantiate component "$component", "$error"/
2616 elsif (!blessed $instance) {
2617 my $metaclass = Moose::Util::find_meta($component);
2618 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2619 my $component_method_from = $method_meta->associated_metaclass->name;
2620 my $value = defined($instance) ? $instance : 'undef';
2621 Catalyst::Exception->throw(
2623 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2630 =head2 $c->setup_dispatcher
2636 sub setup_dispatcher {
2637 my ( $class, $dispatcher ) = @_;
2640 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2643 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2644 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2647 unless ($dispatcher) {
2648 $dispatcher = $class->dispatcher_class;
2651 Class::MOP::load_class($dispatcher);
2653 # dispatcher instance
2654 $class->dispatcher( $dispatcher->new );
2657 =head2 $c->setup_engine
2664 my ( $class, $engine ) = @_;
2667 $engine = 'Catalyst::Engine::' . $engine;
2670 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2671 $engine = 'Catalyst::Engine::' . $env;
2674 if ( $ENV{MOD_PERL} ) {
2675 my $meta = Class::MOP::get_metaclass_by_name($class);
2677 # create the apache method
2678 $meta->add_method('apache' => sub { shift->engine->apache });
2680 my ( $software, $version ) =
2681 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2684 $version =~ s/(\.[^.]+)\./$1/g;
2686 if ( $software eq 'mod_perl' ) {
2690 if ( $version >= 1.99922 ) {
2691 $engine = 'Catalyst::Engine::Apache2::MP20';
2694 elsif ( $version >= 1.9901 ) {
2695 $engine = 'Catalyst::Engine::Apache2::MP19';
2698 elsif ( $version >= 1.24 ) {
2699 $engine = 'Catalyst::Engine::Apache::MP13';
2703 Catalyst::Exception->throw( message =>
2704 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2709 # install the correct mod_perl handler
2710 if ( $version >= 1.9901 ) {
2711 *handler = sub : method {
2712 shift->handle_request(@_);
2716 *handler = sub ($$) { shift->handle_request(@_) };
2721 elsif ( $software eq 'Zeus-Perl' ) {
2722 $engine = 'Catalyst::Engine::Zeus';
2726 Catalyst::Exception->throw(
2727 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2732 $engine = $class->engine_class;
2735 Class::MOP::load_class($engine);
2737 # check for old engines that are no longer compatible
2739 if ( $engine->isa('Catalyst::Engine::Apache')
2740 && !Catalyst::Engine::Apache->VERSION )
2745 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2746 && Catalyst::Engine::Server->VERSION le '0.02' )
2751 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2752 && $engine->VERSION eq '0.01' )
2757 elsif ($engine->isa('Catalyst::Engine::Zeus')
2758 && $engine->VERSION eq '0.01' )
2764 Catalyst::Exception->throw( message =>
2765 qq/Engine "$engine" is not supported by this version of Catalyst/
2770 $class->engine( $engine->new );
2773 =head2 $c->setup_home
2775 Sets up the home directory.
2780 my ( $class, $home ) = @_;
2782 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2786 $home ||= Catalyst::Utils::home($class);
2789 #I remember recently being scolded for assigning config values like this
2790 $class->config->{home} ||= $home;
2791 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2795 =head2 $c->setup_log
2797 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2798 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2801 This method also installs a C<debug> method that returns a true value into the
2802 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2803 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2805 Note that if the log has already been setup, by either a previous call to
2806 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2807 that this method won't actually set up the log object.
2812 my ( $class, $levels ) = @_;
2815 $levels =~ s/^\s+//;
2816 $levels =~ s/\s+$//;
2817 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2819 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2820 if ( defined $env_debug ) {
2821 $levels{debug} = 1 if $env_debug; # Ugly!
2822 delete($levels{debug}) unless $env_debug;
2825 unless ( $class->log ) {
2826 $class->log( Catalyst::Log->new(keys %levels) );
2829 if ( $levels{debug} ) {
2830 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2831 $class->log->debug('Debug messages enabled');
2835 =head2 $c->setup_plugins
2841 =head2 $c->setup_stats
2843 Sets up timing statistics class.
2848 my ( $class, $stats ) = @_;
2850 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2852 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2853 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2854 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2855 $class->log->debug('Statistics enabled');
2860 =head2 $c->registered_plugins
2862 Returns a sorted list of the plugins which have either been stated in the
2863 import list or which have been added via C<< MyApp->plugin(@args); >>.
2865 If passed a given plugin name, it will report a boolean value indicating
2866 whether or not that plugin is loaded. A fully qualified name is required if
2867 the plugin name does not begin with C<Catalyst::Plugin::>.
2869 if ($c->registered_plugins('Some::Plugin')) {
2877 sub registered_plugins {
2879 return sort keys %{ $proto->_plugins } unless @_;
2881 return 1 if exists $proto->_plugins->{$plugin};
2882 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2885 sub _register_plugin {
2886 my ( $proto, $plugin, $instant ) = @_;
2887 my $class = ref $proto || $proto;
2889 Class::MOP::load_class( $plugin );
2890 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2891 if $plugin->isa( 'Catalyst::Component' );
2892 $proto->_plugins->{$plugin} = 1;
2894 my $meta = Class::MOP::get_metaclass_by_name($class);
2895 $meta->superclasses($plugin, $meta->superclasses);
2901 my ( $class, $plugins ) = @_;
2903 $class->_plugins( {} ) unless $class->_plugins;
2904 $plugins = Data::OptList::mkopt($plugins || []);
2907 [ Catalyst::Utils::resolve_namespace(
2908 $class . '::Plugin',
2909 'Catalyst::Plugin', $_->[0]
2915 for my $plugin ( reverse @plugins ) {
2916 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2917 my $meta = find_meta($plugin->[0]);
2918 next if $meta && $meta->isa('Moose::Meta::Role');
2920 $class->_register_plugin($plugin->[0]);
2924 map { $_->[0]->name, $_->[1] }
2925 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2926 map { [find_meta($_->[0]), $_->[1]] }
2929 Moose::Util::apply_all_roles(
2937 Returns an arrayref of the internal execution stack (actions that are
2938 currently executing).
2942 Returns the current timing statistics object. By default Catalyst uses
2943 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2944 L<< stats_class|/"$c->stats_class" >>.
2946 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2947 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2948 profile explicitly, although MyApp.pm still won't profile nor output anything
2951 =head2 $c->stats_class
2953 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2955 =head2 $c->use_stats
2957 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2959 Note that this is a static method, not an accessor and should be overridden
2960 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2967 =head2 $c->write( $data )
2969 Writes $data to the output stream. When using this method directly, you
2970 will need to manually set the C<Content-Length> header to the length of
2971 your output data, if known.
2978 # Finalize headers if someone manually writes output
2979 $c->finalize_headers;
2981 return $c->engine->write( $c, @_ );
2986 Returns the Catalyst version number. Mostly useful for "powered by"
2987 messages in template systems.
2991 sub version { return $Catalyst::VERSION }
2993 =head1 CONFIGURATION
2995 There are a number of 'base' config variables which can be set:
3001 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
3005 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
3009 C<disable_component_resolution_regex_fallback> - Turns
3010 off the deprecated component resolution functionality so
3011 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
3012 are called then regex search will not be attempted on string values and
3013 instead C<undef> will be returned.
3017 C<home> - The application home directory. In an uninstalled application,
3018 this is the top level application directory. In an installed application,
3019 this will be the directory containing C<< MyApp.pm >>.
3023 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
3027 C<name> - The name of the application in debug messages and the debug and
3032 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
3033 until it is accessed. This allows you to (for example) check authentication (and reject
3034 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
3038 C<root> - The root directory for templates. Usually this is just a
3039 subdirectory of the home directory, but you can set it to change the
3040 templates to a different directory.
3044 C<search_extra> - Array reference passed to Module::Pluggable to for additional
3045 namespaces from which components will be loaded (and constructed and stored in
3046 C<< $c->components >>).
3050 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
3051 to be shown in hit debug tables in the test server.
3055 C<use_request_uri_for_path> - Controlls if the C<REQUEST_URI> or C<PATH_INFO> environment
3056 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
3057 for more information.
3061 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
3065 =head1 INTERNAL ACTIONS
3067 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
3068 C<_ACTION>, and C<_END>. These are by default not shown in the private
3069 action table, but you can make them visible with a config parameter.
3071 MyApp->config(show_internal_actions => 1);
3073 =head1 ON-DEMAND PARSER
3075 The request body is usually parsed at the beginning of a request,
3076 but if you want to handle input yourself, you can enable on-demand
3077 parsing with a config parameter.
3079 MyApp->config(parse_on_demand => 1);
3081 =head1 PROXY SUPPORT
3083 Many production servers operate using the common double-server approach,
3084 with a lightweight frontend web server passing requests to a larger
3085 backend server. An application running on the backend server must deal
3086 with two problems: the remote user always appears to be C<127.0.0.1> and
3087 the server's hostname will appear to be C<localhost> regardless of the
3088 virtual host that the user connected through.
3090 Catalyst will automatically detect this situation when you are running
3091 the frontend and backend servers on the same machine. The following
3092 changes are made to the request.
3094 $c->req->address is set to the user's real IP address, as read from
3095 the HTTP X-Forwarded-For header.
3097 The host value for $c->req->base and $c->req->uri is set to the real
3098 host, as read from the HTTP X-Forwarded-Host header.
3100 Additionally, you may be running your backend application on an insecure
3101 connection (port 80) while your frontend proxy is running under SSL. If there
3102 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
3103 tell Catalyst what port the frontend listens on. This will allow all URIs to
3104 be created properly.
3106 In the case of passing in:
3108 X-Forwarded-Port: 443
3110 All calls to C<uri_for> will result in an https link, as is expected.
3112 Obviously, your web server must support these headers for this to work.
3114 In a more complex server farm environment where you may have your
3115 frontend proxy server(s) on different machines, you will need to set a
3116 configuration option to tell Catalyst to read the proxied data from the
3119 MyApp->config(using_frontend_proxy => 1);
3121 If you do not wish to use the proxy support at all, you may set:
3123 MyApp->config(ignore_frontend_proxy => 1);
3125 =head1 THREAD SAFETY
3127 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3128 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3129 believe the Catalyst core to be thread-safe.
3131 If you plan to operate in a threaded environment, remember that all other
3132 modules you are using must also be thread-safe. Some modules, most notably
3133 L<DBD::SQLite>, are not thread-safe.
3139 Join #catalyst on irc.perl.org.
3143 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3144 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3148 http://catalyst.perl.org
3152 http://dev.catalyst.perl.org
3156 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3158 =head2 L<Catalyst::Manual> - The Catalyst Manual
3160 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3162 =head2 L<Catalyst::Engine> - Core engine
3164 =head2 L<Catalyst::Log> - Log class.
3166 =head2 L<Catalyst::Request> - Request object
3168 =head2 L<Catalyst::Response> - Response object
3170 =head2 L<Catalyst::Test> - The test suite.
3172 =head1 PROJECT FOUNDER
3174 sri: Sebastian Riedel <sri@cpan.org>
3180 acme: Leon Brocard <leon@astray.com>
3182 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3186 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3190 andyg: Andy Grundman <andy@hybridized.org>
3192 audreyt: Audrey Tang
3194 bricas: Brian Cassidy <bricas@cpan.org>
3196 Caelum: Rafael Kitover <rkitover@io.com>
3198 chansen: Christian Hansen
3200 chicks: Christopher Hicks
3202 Chisel Wright C<pause@herlpacker.co.uk>
3204 Danijel Milicevic C<me@danijel.de>
3206 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3208 David Naughton, C<naughton@umn.edu>
3212 dhoss: Devin Austin <dhoss@cpan.org>
3214 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3218 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3220 esskar: Sascha Kiefer
3222 fireartist: Carl Franks <cfranks@cpan.org>
3224 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3226 gabb: Danijel Milicevic
3230 Gavin Henry C<ghenry@perl.me.uk>
3234 groditi: Guillermo Roditi <groditi@gmail.com>
3236 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3238 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3240 jcamacho: Juan Camacho
3242 jester: Jesse Sheidlower C<jester@panix.com>
3244 jhannah: Jay Hannah <jay@jays.net>
3250 jon: Jon Schutz <jjschutz@cpan.org>
3252 Jonathan Rockway C<< <jrockway@cpan.org> >>
3254 Kieren Diment C<kd@totaldatasolution.com>
3256 konobi: Scott McWhirter <konobi@cpan.org>
3258 marcus: Marcus Ramberg <mramberg@cpan.org>
3260 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3262 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3266 naughton: David Naughton
3268 ningu: David Kamholz <dkamholz@cpan.org>
3270 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3272 numa: Dan Sully <daniel@cpan.org>
3278 omega: Andreas Marienborg
3280 Oleg Kostyuk <cub.uanic@gmail.com>
3282 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3284 rafl: Florian Ragwitz <rafl@debian.org>
3286 random: Roland Lammel <lammel@cpan.org>
3288 Robert Sedlacek C<< <rs@474.at> >>
3290 SpiceMan: Marcel Montes
3294 szbalint: Balint Szilakszi <szbalint@cpan.org>
3296 t0m: Tomas Doran <bobtfish@bobtfish.net>
3300 Viljo Marrandi C<vilts@yahoo.com>
3302 Will Hawes C<info@whawes.co.uk>
3304 willert: Sebastian Willert <willert@cpan.org>
3306 wreis: Wallace Reis <wallace@reis.org.br>
3308 Yuval Kogman, C<nothingmuch@woobling.org>
3310 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3312 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3316 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3320 This library is free software. You can redistribute it and/or modify it under
3321 the same terms as Perl itself.
3327 __PACKAGE__->meta->make_immutable;