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 Hash::Util qw/lock_hash/;
31 use List::MoreUtils qw/uniq/;
34 use Carp qw/croak carp shortmess/;
36 BEGIN { require 5.008004; }
38 has stack => (is => 'ro', default => sub { [] });
39 has stash => (is => 'rw', default => sub { {} });
40 has state => (is => 'rw', default => 0);
41 has stats => (is => 'rw');
42 has action => (is => 'rw');
43 has counter => (is => 'rw', default => sub { {} });
44 has request => (is => 'rw', default => sub { $_[0]->request_class->new({}) }, required => 1, lazy => 1);
45 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
46 has namespace => (is => 'rw');
48 sub depth { scalar @{ shift->stack || [] }; }
49 sub comp { shift->component(@_) }
52 my $self = shift; return $self->request(@_);
55 my $self = shift; return $self->response(@_);
58 # For backwards compatibility
59 sub finalize_output { shift->finalize_body(@_) };
64 our $RECURSION = 1000;
65 our $DETACH = Catalyst::Exception::Detach->new;
66 our $GO = Catalyst::Exception::Go->new;
68 #I imagine that very few of these really need to be class variables. if any.
69 #maybe we should just make them attributes with a default?
70 __PACKAGE__->mk_classdata($_)
71 for qw/container arguments dispatcher engine log dispatcher_class
72 engine_class context_class request_class response_class stats_class
75 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
76 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
77 __PACKAGE__->request_class('Catalyst::Request');
78 __PACKAGE__->response_class('Catalyst::Response');
79 __PACKAGE__->stats_class('Catalyst::Stats');
81 # Remember to update this in Catalyst::Runtime as well!
83 our $VERSION = '5.80032';
86 my ( $class, @arguments ) = @_;
88 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
90 return unless $class eq 'Catalyst';
92 my $caller = caller();
93 return if $caller eq 'main';
95 my $meta = Moose::Meta::Class->initialize($caller);
97 unless ( $caller->isa('Catalyst') ) { # XXX - Remove!
98 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Component'); # XXX - Remove!
99 $meta->superclasses(@superclasses); # XXX - Remove!
102 # Avoid possible C3 issues if 'Moose::Object' is already on RHS of MyApp
103 $meta->superclasses(grep { $_ ne 'Moose::Object' } $meta->superclasses);
105 unless( $meta->has_method('meta') ){
106 if ($Moose::VERSION >= 1.15) {
107 $meta->_add_meta_method('meta');
110 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
114 $caller->arguments( [@arguments] );
118 sub MODIFY_CODE_ATTRIBUTES {
119 Catalyst::Exception->throw(
120 "Catalyst applications (aka MyApp) cannot be controllers anymore. " .
121 "That has been deprecated and removed. You should create a " .
122 "controller class called Root.pm, and move relevant code to that class."
127 sub _application { $_[0] }
131 Catalyst - The Elegant MVC Web Application Framework
135 See the L<Catalyst::Manual> distribution for comprehensive
136 documentation and tutorials.
138 # Install Catalyst::Devel for helpers and other development tools
139 # use the helper to create a new application
142 # add models, views, controllers
143 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
144 script/myapp_create.pl view MyTemplate TT
145 script/myapp_create.pl controller Search
147 # built in testserver -- use -r to restart automatically on changes
148 # --help to see all available options
149 script/myapp_server.pl
151 # command line testing interface
152 script/myapp_test.pl /yada
155 use Catalyst qw/-Debug/; # include plugins here as well
157 ### In lib/MyApp/Controller/Root.pm (autocreated)
158 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
159 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
160 $c->stash->{template} = 'foo.tt'; # set the template
161 # lookup something from db -- stash vars are passed to TT
163 $c->model('Database::Foo')->search( { country => $args[0] } );
164 if ( $c->req->params->{bar} ) { # access GET or POST parameters
165 $c->forward( 'bar' ); # process another action
166 # do something else after forward returns
170 # The foo.tt TT template can use the stash data from the database
171 [% WHILE (item = data.next) %]
175 # called for /bar/of/soap, /bar/of/soap/10, etc.
176 sub bar : Path('/bar/of/soap') { ... }
178 # called for all actions, from the top-most controller downwards
180 my ( $self, $c ) = @_;
181 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
182 $c->res->redirect( '/login' ); # require login
183 return 0; # abort request and go immediately to end()
185 return 1; # success; carry on to next action
188 # called after all actions are finished
190 my ( $self, $c ) = @_;
191 if ( scalar @{ $c->error } ) { ... } # handle errors
192 return if $c->res->body; # already have a response
193 $c->forward( 'MyApp::View::TT' ); # render template
196 ### in MyApp/Controller/Foo.pm
197 # called for /foo/bar
198 sub bar : Local { ... }
200 # called for /blargle
201 sub blargle : Global { ... }
203 # an index action matches /foo, but not /foo/1, etc.
204 sub index : Private { ... }
206 ### in MyApp/Controller/Foo/Bar.pm
207 # called for /foo/bar/baz
208 sub baz : Local { ... }
210 # first Root auto is called, then Foo auto, then this
211 sub auto : Private { ... }
213 # powerful regular expression paths are also possible
214 sub details : Regex('^product/(\w+)/details$') {
215 my ( $self, $c ) = @_;
216 # extract the (\w+) from the URI
217 my $product = $c->req->captures->[0];
220 See L<Catalyst::Manual::Intro> for additional information.
224 Catalyst is a modern framework for making web applications without the
225 pain usually associated with this process. This document is a reference
226 to the main Catalyst application. If you are a new user, we suggest you
227 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
229 See L<Catalyst::Manual> for more documentation.
231 Catalyst plugins can be loaded by naming them as arguments to the "use
232 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
233 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
236 use Catalyst qw/My::Module/;
238 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
239 fully qualify the name by using a unary plus:
243 +Fully::Qualified::Plugin::Name
246 Special flags like C<-Debug> and C<-Engine> can also be specified as
247 arguments when Catalyst is loaded:
249 use Catalyst qw/-Debug My::Module/;
251 The position of plugins and flags in the chain is important, because
252 they are loaded in the order in which they appear.
254 The following flags are supported:
258 Enables debug output. You can also force this setting from the system
259 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
260 settings override the application, with <MYAPP>_DEBUG having the highest
263 This sets the log level to 'debug' and enables full debug output on the
264 error screen. If you only want the latter, see L<< $c->debug >>.
268 Forces Catalyst to use a specific engine. Omit the
269 C<Catalyst::Engine::> prefix of the engine name, i.e.:
271 use Catalyst qw/-Engine=CGI/;
275 Forces Catalyst to use a specific home directory, e.g.:
277 use Catalyst qw[-Home=/usr/mst];
279 This can also be done in the shell environment by setting either the
280 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
281 is replaced with the uppercased name of your application, any "::" in
282 the name will be replaced with underscores, e.g. MyApp::Web should use
283 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
285 If none of these are set, Catalyst will attempt to automatically detect the
286 home directory. If you are working in a development envirnoment, Catalyst
287 will try and find the directory containing either Makefile.PL, Build.PL or
288 dist.ini. If the application has been installed into the system (i.e.
289 you have done C<make install>), then Catalyst will use the path to your
290 application module, without the .pm extension (ie, /foo/MyApp if your
291 application was installed at /foo/MyApp.pm)
295 use Catalyst '-Log=warn,fatal,error';
297 Specifies a comma-delimited list of log levels.
301 Enables statistics collection and reporting.
303 use Catalyst qw/-Stats=1/;
305 You can also force this setting from the system environment with CATALYST_STATS
306 or <MYAPP>_STATS. The environment settings override the application, with
307 <MYAPP>_STATS having the highest priority.
309 Stats are also enabled if L<< debugging |/"-Debug" >> is enabled.
313 =head2 INFORMATION ABOUT THE CURRENT REQUEST
317 Returns a L<Catalyst::Action> object for the current action, which
318 stringifies to the action name. See L<Catalyst::Action>.
322 Returns the namespace of the current action, i.e., the URI prefix
323 corresponding to the controller of the current action. For example:
325 # in Controller::Foo::Bar
326 $c->namespace; # returns 'foo/bar';
332 Returns the current L<Catalyst::Request> object, giving access to
333 information about the current client request (including parameters,
334 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
336 =head2 REQUEST FLOW HANDLING
338 =head2 $c->forward( $action [, \@arguments ] )
340 =head2 $c->forward( $class, $method, [, \@arguments ] )
342 Forwards processing to another action, by its private name. If you give a
343 class name but no method, C<process()> is called. You may also optionally
344 pass arguments in an arrayref. The action will receive the arguments in
345 C<@_> and C<< $c->req->args >>. Upon returning from the function,
346 C<< $c->req->args >> will be restored to the previous values.
348 Any data C<return>ed from the action forwarded to, will be returned by the
351 my $foodata = $c->forward('/foo');
352 $c->forward('index');
353 $c->forward(qw/Model::DBIC::Foo do_stuff/);
354 $c->forward('View::TT');
356 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
357 an C<< eval { } >> around the call (actually
358 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus de-fatalizing
359 all 'dies' within the called action. If you want C<die> to propagate you
360 need to do something like:
363 die join "\n", @{ $c->error } if @{ $c->error };
365 Or make sure to always return true values from your actions and write
368 $c->forward('foo') || return;
370 Another note is that C<< $c->forward >> always returns a scalar because it
371 actually returns $c->state which operates in a scalar context.
372 Thus, something like:
376 in an action that is forwarded to is going to return a scalar,
377 i.e. how many items are in that array, which is probably not what you want.
378 If you need to return an array then return a reference to it,
381 $c->stash->{array} = \@array;
383 and access it from the stash.
385 Keep in mind that the C<end> method used is that of the caller action. So a C<$c-E<gt>detach> inside a forwarded action would run the C<end> method from the original action requested.
389 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
391 =head2 $c->detach( $action [, \@arguments ] )
393 =head2 $c->detach( $class, $method, [, \@arguments ] )
397 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
398 doesn't return to the previous action when processing is finished.
400 When called with no arguments it escapes the processing chain entirely.
404 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
406 =head2 $c->visit( $action [, \@captures, \@arguments ] )
408 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
410 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
411 but does a full dispatch, instead of just calling the new C<$action> /
412 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
413 you go to are called, just like a new request.
415 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
416 This means, for example, that C<< $c->action >> methods such as
417 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
418 L<reverse|Catalyst::Action/reverse> return information for the visited action
419 when they are invoked within the visited action. This is different from the
420 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
421 continues to use the $c->action object from the caller action even when
422 invoked from the callee.
424 C<< $c->stash >> is kept unchanged.
426 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
427 allows you to "wrap" another action, just as it would have been called by
428 dispatching from a URL, while the analogous
429 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
430 transfer control to another action as if it had been reached directly from a URL.
434 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
436 =head2 $c->go( $action [, \@captures, \@arguments ] )
438 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
440 The relationship between C<go> and
441 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
442 the relationship between
443 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
444 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
445 C<< $c->go >> will perform a full dispatch on the specified action or method,
446 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
447 C<go> escapes the processing of the current request chain on completion, and
448 does not return to its caller.
450 @arguments are arguments to the final destination of $action. @captures are
451 arguments to the intermediate steps, if any, on the way to the final sub of
456 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
462 Returns the current L<Catalyst::Response> object, see there for details.
466 Returns a hashref to the stash, which may be used to store data and pass
467 it between components during a request. You can also set hash keys by
468 passing arguments. The stash is automatically sent to the view. The
469 stash is cleared at the end of a request; it cannot be used for
470 persistent storage (for this you must use a session; see
471 L<Catalyst::Plugin::Session> for a complete system integrated with
474 $c->stash->{foo} = $bar;
475 $c->stash( { moose => 'majestic', qux => 0 } );
476 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
478 # stash is automatically passed to the view for use in a template
479 $c->forward( 'MyApp::View::TT' );
483 around stash => sub {
486 my $stash = $orig->($c);
488 my $new_stash = @_ > 1 ? {@_} : $_[0];
489 croak('stash takes a hash or hashref') unless ref $new_stash;
490 foreach my $key ( keys %$new_stash ) {
491 $stash->{$key} = $new_stash->{$key};
501 =head2 $c->error($error, ...)
503 =head2 $c->error($arrayref)
505 Returns an arrayref containing error messages. If Catalyst encounters an
506 error while processing a request, it stores the error in $c->error. This
507 method should only be used to store fatal error messages.
509 my @error = @{ $c->error };
513 $c->error('Something bad happened');
520 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
521 croak @$error unless ref $c;
522 push @{ $c->{error} }, @$error;
524 elsif ( defined $_[0] ) { $c->{error} = undef }
525 return $c->{error} || [];
531 Contains the return value of the last executed action.
532 Note that << $c->state >> operates in a scalar context which means that all
533 values it returns are scalar.
535 =head2 $c->clear_errors
537 Clear errors. You probably don't want to clear the errors unless you are
538 implementing a custom error screen.
540 This is equivalent to running
551 =head2 COMPONENT ACCESSORS
553 =head2 $c->controller($name)
555 Gets a L<Catalyst::Controller> instance by name.
557 $c->controller('Foo')->do_stuff;
559 If the name is omitted, will return the controller for the dispatched
562 If you want to search for controllers, pass in a regexp as the argument.
564 # find all controllers that start with Foo
565 my @foo_controllers = $c->controller(qr{^Foo});
571 my ( $c, $name, @args ) = @_;
573 $name ||= Catalyst::Utils::class2classshortsuffix( $c->action->class );
575 return $c->container->get_component_from_sub_container( 'controller', $name, $c, @args);
578 =head2 $c->model($name)
580 Gets a L<Catalyst::Model> instance by name.
582 $c->model('Foo')->do_stuff;
584 Any extra arguments are directly passed to ACCEPT_CONTEXT.
586 If the name is omitted, it will look for
587 - a model object in $c->stash->{current_model_instance}, then
588 - a model name in $c->stash->{current_model}, then
589 - a config setting 'default_model', or
590 - check if there is only one model, and return it if that's the case.
592 If you want to search for models, pass in a regexp as the argument.
594 # find all models that start with Foo
595 my @foo_models = $c->model(qr{^Foo});
600 my ( $c, $name, @args ) = @_;
602 if (ref $c && !$name) {
603 return $c->stash->{current_model_instance}
604 if $c->stash->{current_model_instance};
606 $name = $c->stash->{current_model}
607 if $c->stash->{current_model};
610 return $c->container->get_component_from_sub_container( 'model', $name, $c, @args);
614 =head2 $c->view($name)
616 Gets a L<Catalyst::View> instance by name.
618 $c->view('Foo')->do_stuff;
620 Any extra arguments are directly passed to ACCEPT_CONTEXT.
622 If the name is omitted, it will look for
623 - a view object in $c->stash->{current_view_instance}, then
624 - a view name in $c->stash->{current_view}, then
625 - a config setting 'default_view', or
626 - check if there is only one view, and return it if that's the case.
628 If you want to search for views, pass in a regexp as the argument.
630 # find all views that start with Foo
631 my @foo_views = $c->view(qr{^Foo});
636 my ( $c, $name, @args ) = @_;
638 if (ref $c && !$name) {
639 return $c->stash->{current_view_instance}
640 if $c->stash->{current_view_instance};
642 $name = $c->stash->{current_view}
643 if $c->stash->{current_view};
646 return $c->container->get_component_from_sub_container( 'view', $name, $c, @args);
649 =head2 $c->controllers
651 Returns the available names which can be passed to $c->controller
657 return $c->container->get_sub_container('controller')->get_service_list;
662 Returns the available names which can be passed to $c->model
668 return $c->container->get_sub_container('model')->get_service_list;
674 Returns the available names which can be passed to $c->view
680 return $c->container->get_sub_container('view')->get_service_list;
683 =head2 $c->comp($name)
685 =head2 $c->component($name)
687 Gets a component object by name. This method is not recommended,
688 unless you want to get a specific component by full
689 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
690 should be used instead.
692 If C<$name> is a regexp, a list of components matched against the full
693 component name will be returned.
698 my ( $c, $component, @args ) = @_;
700 unless ($component) {
701 $c->log->warn('Calling $c->component with no args is deprecated and ');
702 $c->log->warn('will be removed in a future release.');
703 $c->log->warn('Use $c->component_list instead.');
704 return $c->component_list;
707 my ($type, $name) = _get_component_type_name($component);
709 return $c->container->get_component_from_sub_container(
710 $type, $name, $c, @args
713 my @result = $c->container->find_component( $component, $c, @args );
715 # list context for regexp searches
716 return @result if ref $component;
718 # only one component (if it's found) for string searches
719 return shift @result if @result;
721 if (ref $c eq $component) {
722 $c->log->warn('You are calling $c->comp("MyApp"). This behaviour is');
723 $c->log->warn('deprecated, and will be removed in a future release.');
727 $c->log->warn("Looking for '$component', but nothing was found.");
729 # I would expect to return an empty list here, but that breaks back-compat
730 $c->log->warn('Component not found, returning the list of existing');
731 $c->log->warn('components. This behavior is deprecated and will be');
732 $c->log->warn('removed in a future release. Use $c->component_list');
733 $c->log->warn('instead.');
735 return $c->component_list;
738 =head2 $c->component_list
740 Returns the sorted list of the component names of the application.
744 sub component_list { sort keys %{ shift->components } }
746 =head2 CLASS DATA AND HELPER CLASSES
750 Returns or takes a hashref containing the application's configuration.
752 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
754 You can also use a C<YAML>, C<XML> or L<Config::General> config file
755 like C<myapp.conf> in your applications home directory. See
756 L<Catalyst::Plugin::ConfigLoader>.
758 =head3 Cascading configuration
760 The config method is present on all Catalyst components, and configuration
761 will be merged when an application is started. Configuration loaded with
762 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
763 followed by configuration in your top level C<MyApp> class. These two
764 configurations are merged, and then configuration data whose hash key matches a
765 component name is merged with configuration for that component.
767 The configuration for a component is then passed to the C<new> method when a
768 component is constructed.
772 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
773 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
775 will mean that C<MyApp::Model::Foo> receives the following data when
778 MyApp::Model::Foo->new({
784 It's common practice to use a Moose attribute
785 on the receiving component to access the config value.
787 package MyApp::Model::Foo;
791 # this attr will receive 'baz' at construction time
797 You can then get the value 'baz' by calling $c->model('Foo')->bar
798 (or $self->bar inside code in the model).
800 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
801 as a way of reading config within your code, as this B<will not> give you the
802 correctly merged config back. You B<MUST> take the config values supplied to
803 the constructor and use those instead.
807 around config => sub {
811 croak('Setting config after setup has been run is not allowed.')
812 if ( @_ and $c->setup_finished );
819 Returns the logging object instance. Unless it is already set, Catalyst
820 sets this up with a L<Catalyst::Log> object. To use your own log class,
821 set the logger with the C<< __PACKAGE__->log >> method prior to calling
822 C<< __PACKAGE__->setup >>.
824 __PACKAGE__->log( MyLogger->new );
829 $c->log->info( 'Now logging with my own logger!' );
831 Your log class should implement the methods described in
837 Returns 1 if debug mode is enabled, 0 otherwise.
839 You can enable debug mode in several ways:
843 =item By calling myapp_server.pl with the -d flag
845 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
847 =item The -Debug option in your MyApp.pm
849 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
853 The first three also set the log level to 'debug'.
855 Calling C<< $c->debug(1) >> has no effect.
861 =head2 $c->dispatcher
863 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
867 Returns the engine instance. See L<Catalyst::Engine>.
870 =head2 UTILITY METHODS
872 =head2 $c->path_to(@path)
874 Merges C<@path> with C<< $c->config->{home} >> and returns a
875 L<Path::Class::Dir> object. Note you can usually use this object as
876 a filename, but sometimes you will have to explicitly stringify it
877 yourself by calling the C<< ->stringify >> method.
881 $c->path_to( 'db', 'sqlite.db' );
886 my ( $c, @path ) = @_;
887 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
888 if ( -d $path ) { return $path }
889 else { return Path::Class::File->new( $c->config->{home}, @path ) }
892 =head2 $c->plugin( $name, $class, @args )
894 Helper method for plugins. It creates a class data accessor/mutator and
895 loads and instantiates the given class.
897 MyApp->plugin( 'prototype', 'HTML::Prototype' );
899 $c->prototype->define_javascript_functions;
901 B<Note:> This method of adding plugins is deprecated. The ability
902 to add plugins like this B<will be removed> in a Catalyst 5.81.
903 Please do not use this functionality in new code.
908 my ( $class, $name, $plugin, @args ) = @_;
910 # See block comment in t/aggregate/unit_core_plugin.t
911 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
913 $class->_register_plugin( $plugin, 1 );
915 eval { $plugin->import };
916 $class->mk_classdata($name);
918 eval { $obj = $plugin->new(@args) };
921 Catalyst::Exception->throw( message =>
922 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
926 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
932 Initializes the dispatcher and engine, loads any plugins, and loads the
933 model, view, and controller components. You may also specify an array
934 of plugins to load here, if you choose to not load them in the C<use
938 MyApp->setup( qw/-Debug/ );
943 my ( $class, @arguments ) = @_;
944 croak('Running setup more than once')
945 if ( $class->setup_finished );
947 unless ( $class->isa('Catalyst') ) {
949 Catalyst::Exception->throw(
950 message => qq/'$class' does not inherit from Catalyst/ );
953 if ( $class->arguments ) {
954 @arguments = ( @arguments, @{ $class->arguments } );
960 foreach (@arguments) {
964 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
966 elsif (/^-(\w+)=?(.*)$/) {
967 $flags->{ lc $1 } = $2;
970 push @{ $flags->{plugins} }, $_;
974 $class->setup_config();
975 $class->setup_home( delete $flags->{home} );
977 $class->setup_log( delete $flags->{log} );
978 $class->setup_plugins( delete $flags->{plugins} );
979 $class->setup_dispatcher( delete $flags->{dispatcher} );
980 $class->setup_engine( delete $flags->{engine} );
981 $class->setup_stats( delete $flags->{stats} );
983 for my $flag ( sort keys %{$flags} ) {
985 if ( my $code = $class->can( 'setup_' . $flag ) ) {
986 &$code( $class, delete $flags->{$flag} );
989 $class->log->warn(qq/Unknown flag "$flag"/);
993 eval { require Catalyst::Devel; };
994 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
995 $class->log->warn(<<"EOF");
996 You are running an old script!
998 Please update by running (this will overwrite existing files):
999 catalyst.pl -force -scripts $class
1001 or (this will not overwrite existing files):
1002 catalyst.pl -scripts $class
1007 if ( $class->debug ) {
1008 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1011 my $column_width = Catalyst::Utils::term_width() - 6;
1012 my $t = Text::SimpleTable->new($column_width);
1013 $t->row($_) for @plugins;
1014 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1017 my $dispatcher = $class->dispatcher;
1018 my $engine = $class->engine;
1019 my $home = $class->config->{home};
1021 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1022 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1026 ? $class->log->debug(qq/Found home "$home"/)
1027 : $class->log->debug(qq/Home "$home" doesn't exist/)
1028 : $class->log->debug(q/Couldn't find home/);
1031 # Call plugins setup, this is stupid and evil.
1032 # Also screws C3 badly on 5.10, hack to avoid.
1034 no warnings qw/redefine/;
1035 local *setup = sub { };
1036 $class->setup unless $Catalyst::__AM_RESTARTING;
1039 $class->setup_components;
1041 if ( $class->debug ) { # XXX - Fixme to be a method on the container? (Or at least get a) data structure back from the container!!
1042 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1043 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1044 for my $comp ( sort keys %{ $class->components } ) {
1045 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1046 $t->row( $comp, $type );
1048 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1049 if ( keys %{ $class->components } );
1052 $class->setup_actions;
1054 if ( $class->debug ) {
1055 my $name = $class->config->{name} || 'Application';
1056 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1059 # Make sure that the application class becomes immutable at this point,
1060 B::Hooks::EndOfScope::on_scope_end {
1062 my $meta = Class::MOP::get_metaclass_by_name($class);
1065 && ! { $meta->immutable_options }->{replace_constructor}
1067 $class->isa('Class::Accessor::Fast')
1068 || $class->isa('Class::Accessor')
1071 warn "You made your application class ($class) immutable, "
1072 . "but did not inline the\nconstructor. "
1073 . "This will break catalyst, as your app \@ISA "
1074 . "Class::Accessor(::Fast)?\nPlease pass "
1075 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1077 $meta->make_immutable(
1078 replace_constructor => 1,
1079 ) unless $meta->is_immutable;
1082 if ($class->config->{case_sensitive}) {
1083 $class->log->warn($class . "->config->{case_sensitive} is set.");
1084 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1087 $class->setup_finalize;
1088 # Should be the last thing we do so that user things hooking
1089 # setup_finalize can log..
1090 $class->log->_flush() if $class->log->can('_flush');
1091 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1094 =head2 $app->setup_finalize
1096 A hook to attach modifiers to. This method does not do anything except set the
1097 C<setup_finished> accessor.
1099 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1103 after setup_finalize => sub {
1111 sub setup_finalize {
1113 $class->setup_finished(1);
1116 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1118 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1120 Constructs an absolute L<URI> object based on the application root, the
1121 provided path, and the additional arguments and query parameters provided.
1122 When used as a string, provides a textual URI. If you need more flexibility
1123 than this (i.e. the option to provide relative URIs etc.) see
1124 L<Catalyst::Plugin::SmartURI>.
1126 If no arguments are provided, the URI for the current action is returned.
1127 To return the current action and also provide @args, use
1128 C<< $c->uri_for( $c->action, @args ) >>.
1130 If the first argument is a string, it is taken as a public URI path relative
1131 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1132 relative to the application root (if it does). It is then merged with
1133 C<< $c->request->base >>; any C<@args> are appended as additional path
1134 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1136 If the first argument is a L<Catalyst::Action> it represents an action which
1137 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1138 optional C<\@captures> argument (an arrayref) allows passing the captured
1139 variables that are needed to fill in the paths of Chained and Regex actions;
1140 once the path is resolved, C<uri_for> continues as though a path was
1141 provided, appending any arguments or parameters and creating an absolute
1144 The captures for the current request can be found in
1145 C<< $c->request->captures >>, and actions can be resolved using
1146 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1147 path, use C<< $c->uri_for_action >> instead.
1149 # Equivalent to $c->req->uri
1150 $c->uri_for($c->action, $c->req->captures,
1151 @{ $c->req->args }, $c->req->params);
1153 # For the Foo action in the Bar controller
1154 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1156 # Path to a static resource
1157 $c->uri_for('/static/images/logo.png');
1162 my ( $c, $path, @args ) = @_;
1164 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1165 $path = $path->path_prefix;
1170 undef($path) if (defined $path && $path eq '');
1173 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1175 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1176 foreach my $arg (@args) {
1177 utf8::encode($arg) if utf8::is_utf8($arg);
1178 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1181 if ( blessed($path) ) { # action object
1182 s|/|%2F|g for @args;
1183 my $captures = [ map { s|/|%2F|g; $_; }
1184 ( scalar @args && ref $args[0] eq 'ARRAY'
1188 foreach my $capture (@$captures) {
1189 utf8::encode($capture) if utf8::is_utf8($capture);
1190 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1194 $path = $c->dispatcher->uri_for_action($action, $captures);
1195 if (not defined $path) {
1196 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1200 $path = '/' if $path eq '';
1203 unshift(@args, $path);
1205 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1206 my $namespace = $c->namespace;
1207 if (defined $path) { # cheesy hack to handle path '../foo'
1208 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1210 unshift(@args, $namespace || '');
1213 # join args with '/', or a blank string
1214 my $args = join('/', grep { defined($_) } @args);
1215 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1217 my $base = $c->req->base;
1218 my $class = ref($base);
1219 $base =~ s{(?<!/)$}{/};
1223 if (my @keys = keys %$params) {
1224 # somewhat lifted from URI::_query's query_form
1225 $query = '?'.join('&', map {
1226 my $val = $params->{$_};
1227 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1230 $val = '' unless defined $val;
1233 utf8::encode( $param ) if utf8::is_utf8($param);
1234 # using the URI::Escape pattern here so utf8 chars survive
1235 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1237 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1241 my $res = bless(\"${base}${args}${query}", $class);
1245 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1247 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1253 A private path to the Catalyst action you want to create a URI for.
1255 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1256 >> and passing the resulting C<$action> and the remaining arguments to C<<
1259 You can also pass in a Catalyst::Action object, in which case it is passed to
1262 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.
1264 For example, if the action looks like:
1266 package MyApp::Controller::Users;
1268 sub lst : Path('the-list') {}
1272 $c->uri_for_action('/users/lst')
1274 and it will create the URI /users/the-list.
1280 sub uri_for_action {
1281 my ( $c, $path, @args ) = @_;
1282 my $action = blessed($path)
1284 : $c->dispatcher->get_action_by_path($path);
1285 unless (defined $action) {
1286 croak "Can't find action for path '$path'";
1288 return $c->uri_for( $action, @args );
1291 =head2 $c->welcome_message
1293 Returns the Catalyst welcome HTML page.
1297 sub welcome_message {
1299 my $name = $c->config->{name};
1300 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1301 my $prefix = Catalyst::Utils::appprefix( ref $c );
1302 $c->response->content_type('text/html; charset=utf-8');
1304 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1305 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1306 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1308 <meta http-equiv="Content-Language" content="en" />
1309 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1310 <title>$name on Catalyst $VERSION</title>
1311 <style type="text/css">
1314 background-color: #eee;
1321 margin-bottom: 10px;
1323 background-color: #ccc;
1324 border: 1px solid #aaa;
1329 font-family: verdana, tahoma, sans-serif;
1332 font-family: verdana, tahoma, sans-serif;
1335 text-decoration: none;
1337 border-bottom: 1px dotted #bbb;
1339 :link:hover, :visited:hover {
1352 background-color: #fff;
1353 border: 1px solid #aaa;
1357 font-weight: normal;
1379 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1384 <img src="$logo" alt="Catalyst Logo" />
1386 <p>Welcome to the world of Catalyst.
1387 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1388 framework will make web development something you had
1389 never expected it to be: Fun, rewarding, and quick.</p>
1390 <h2>What to do now?</h2>
1391 <p>That really depends on what <b>you</b> want to do.
1392 We do, however, provide you with a few starting points.</p>
1393 <p>If you want to jump right into web development with Catalyst
1394 you might want to start with a tutorial.</p>
1395 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1397 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1399 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1400 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1402 <h2>What to do next?</h2>
1403 <p>Next it's time to write an actual application. Use the
1404 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1405 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1406 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1407 they can save you a lot of work.</p>
1408 <pre><code>script/${prefix}_create.pl --help</code></pre>
1409 <p>Also, be sure to check out the vast and growing
1410 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1411 you are likely to find what you need there.
1415 <p>Catalyst has a very active community. Here are the main places to
1416 get in touch with us.</p>
1419 <a href="http://dev.catalyst.perl.org">Wiki</a>
1422 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1425 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1428 <h2>In conclusion</h2>
1429 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1430 as we enjoyed making it. Please contact us if you have ideas
1431 for improvement or other feedback.</p>
1439 =head1 INTERNAL METHODS
1441 These methods are not meant to be used by end users.
1443 =head2 $c->components
1445 Returns a hash of components.
1450 my ( $class, $comps ) = @_;
1452 # FIXME: should this ugly kludge exist?
1453 $class->setup_config unless defined $class->container;
1456 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
1459 for my $component ( keys %$comps ) {
1460 my ($type, $name) = _get_component_type_name($component);
1462 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
1467 for my $container (keys %$containers) {
1468 my @service_list = $containers->{$container}->get_service_list;
1469 for my $component (@service_list) {
1470 $components{$component} =
1471 $containers->{$container}->resolve(service => $component);
1475 return lock_hash %components;
1478 =head2 $c->context_class
1480 Returns or sets the context class.
1484 Returns a hashref containing coderefs and execution counts (needed for
1485 deep recursion detection).
1489 Returns the number of actions on the current internal execution stack.
1493 Dispatches a request to actions.
1497 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1499 =head2 $c->dispatcher_class
1501 Returns or sets the dispatcher class.
1503 =head2 $c->dump_these
1505 Returns a list of 2-element array references (name, structure) pairs
1506 that will be dumped on the error page in debug mode.
1512 [ Request => $c->req ],
1513 [ Response => $c->res ],
1514 [ Stash => $c->stash ],
1515 [ Config => $c->config ];
1518 =head2 $c->engine_class
1520 Returns or sets the engine class.
1522 =head2 $c->execute( $class, $coderef )
1524 Execute a coderef in given class and catch exceptions. Errors are available
1530 my ( $c, $class, $code ) = @_;
1531 $class = $c->component($class) || $class;
1534 if ( $c->depth >= $RECURSION ) {
1535 my $action = $code->reverse();
1536 $action = "/$action" unless $action =~ /->/;
1537 my $error = qq/Deep recursion detected calling "${action}"/;
1538 $c->log->error($error);
1544 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1546 push( @{ $c->stack }, $code );
1548 no warnings 'recursion';
1549 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1550 # I have no idea how, ergo $ret (which appears to fix the issue)
1551 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1553 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1555 my $last = pop( @{ $c->stack } );
1557 if ( my $error = $@ ) {
1558 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1559 $error->rethrow if $c->depth > 1;
1561 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1562 $error->rethrow if $c->depth > 0;
1565 unless ( ref $error ) {
1566 no warnings 'uninitialized';
1568 my $class = $last->class;
1569 my $name = $last->name;
1570 $error = qq/Caught exception in $class->$name "$error"/;
1579 sub _stats_start_execute {
1580 my ( $c, $code ) = @_;
1581 my $appclass = ref($c) || $c;
1582 return if ( ( $code->name =~ /^_.*/ )
1583 && ( !$appclass->config->{show_internal_actions} ) );
1585 my $action_name = $code->reverse();
1586 $c->counter->{$action_name}++;
1588 my $action = $action_name;
1589 $action = "/$action" unless $action =~ /->/;
1591 # determine if the call was the result of a forward
1592 # this is done by walking up the call stack and looking for a calling
1593 # sub of Catalyst::forward before the eval
1595 for my $index ( 2 .. 11 ) {
1597 if ( ( caller($index) )[0] eq 'Catalyst'
1598 && ( caller($index) )[3] eq '(eval)' );
1600 if ( ( caller($index) )[3] =~ /forward$/ ) {
1601 $callsub = ( caller($index) )[3];
1602 $action = "-> $action";
1607 my $uid = $action_name . $c->counter->{$action_name};
1609 # is this a root-level call or a forwarded call?
1610 if ( $callsub =~ /forward$/ ) {
1611 my $parent = $c->stack->[-1];
1613 # forward, locate the caller
1614 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1617 parent => "$parent" . $c->counter->{"$parent"},
1623 # forward with no caller may come from a plugin
1642 sub _stats_finish_execute {
1643 my ( $c, $info ) = @_;
1644 $c->stats->profile( end => $info );
1649 Finalizes the request.
1656 for my $error ( @{ $c->error } ) {
1657 $c->log->error($error);
1660 # Allow engine to handle finalize flow (for POE)
1661 my $engine = $c->engine;
1662 if ( my $code = $engine->can('finalize') ) {
1667 $c->finalize_uploads;
1670 if ( $#{ $c->error } >= 0 ) {
1674 $c->finalize_headers;
1677 if ( $c->request->method eq 'HEAD' ) {
1678 $c->response->body('');
1686 if ($c->use_stats) {
1687 my $elapsed = sprintf '%f', $c->stats->elapsed;
1688 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1690 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1693 return $c->response->status;
1696 =head2 $c->finalize_body
1702 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1704 =head2 $c->finalize_cookies
1710 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1712 =head2 $c->finalize_error
1718 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1720 =head2 $c->finalize_headers
1726 sub finalize_headers {
1729 my $response = $c->response; #accessor calls can add up?
1731 # Check if we already finalized headers
1732 return if $response->finalized_headers;
1735 if ( my $location = $response->redirect ) {
1736 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1737 $response->header( Location => $location );
1739 if ( !$response->has_body ) {
1740 # Add a default body if none is already present
1742 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1748 if ( defined $response->body && length $response->body && !$response->content_length ) {
1750 # get the length from a filehandle
1751 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1753 my $stat = stat $response->body;
1754 if ( $stat && $stat->size > 0 ) {
1755 $response->content_length( $stat->size );
1758 $c->log->warn('Serving filehandle without a content-length');
1762 # everything should be bytes at this point, but just in case
1763 $response->content_length( length( $response->body ) );
1768 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1769 $response->headers->remove_header("Content-Length");
1770 $response->body('');
1773 $c->finalize_cookies;
1775 $c->engine->finalize_headers( $c, @_ );
1778 $response->finalized_headers(1);
1781 =head2 $c->finalize_output
1783 An alias for finalize_body.
1785 =head2 $c->finalize_read
1787 Finalizes the input after reading is complete.
1791 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1793 =head2 $c->finalize_uploads
1795 Finalizes uploads. Cleans up any temporary files.
1799 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1801 =head2 $c->get_action( $action, $namespace )
1803 Gets an action in a given namespace.
1807 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1809 =head2 $c->get_actions( $action, $namespace )
1811 Gets all actions of a given name in a namespace and all parent
1816 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1818 =head2 $app->handle_request( @arguments )
1820 Called to handle each HTTP request.
1824 sub handle_request {
1825 my ( $class, @arguments ) = @_;
1827 # Always expect worst case!
1830 if ($class->debug) {
1831 my $secs = time - $START || 1;
1832 my $av = sprintf '%.3f', $COUNT / $secs;
1833 my $time = localtime time;
1834 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1837 my $c = $class->prepare(@arguments);
1839 $status = $c->finalize;
1842 if ( my $error = $@ ) {
1844 $class->log->error(qq/Caught exception in engine "$error"/);
1849 if(my $coderef = $class->log->can('_flush')){
1850 $class->log->$coderef();
1855 =head2 $c->prepare( @arguments )
1857 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1863 my ( $class, @arguments ) = @_;
1866 # After the app/ctxt split, this should become an attribute based on something passed
1867 # into the application.
1868 $class->context_class( ref $class || $class ) unless $class->context_class;
1870 my $c = $class->context_class->new({});
1872 # For on-demand data
1873 $c->request->_context($c);
1874 $c->response->_context($c);
1876 #surely this is not the most efficient way to do things...
1877 $c->stats($class->stats_class->new)->enable($c->use_stats);
1878 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
1879 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1882 #XXX reuse coderef from can
1883 # Allow engine to direct the prepare flow (for POE)
1884 if ( $c->engine->can('prepare') ) {
1885 $c->engine->prepare( $c, @arguments );
1888 $c->prepare_request(@arguments);
1889 $c->prepare_connection;
1890 $c->prepare_query_parameters;
1891 $c->prepare_headers;
1892 $c->prepare_cookies;
1895 # Prepare the body for reading, either by prepare_body
1896 # or the user, if they are using $c->read
1899 # Parse the body unless the user wants it on-demand
1900 unless ( ref($c)->config->{parse_on_demand} ) {
1905 my $method = $c->req->method || '';
1906 my $path = $c->req->path;
1907 $path = '/' unless length $path;
1908 my $address = $c->req->address || '';
1917 =head2 $c->prepare_action
1919 Prepares action. See L<Catalyst::Dispatcher>.
1923 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1925 =head2 $c->prepare_body
1927 Prepares message body.
1934 return if $c->request->_has_body;
1936 # Initialize on-demand data
1937 $c->engine->prepare_body( $c, @_ );
1938 $c->prepare_parameters;
1939 $c->prepare_uploads;
1942 =head2 $c->prepare_body_chunk( $chunk )
1944 Prepares a chunk of data before sending it to L<HTTP::Body>.
1946 See L<Catalyst::Engine>.
1950 sub prepare_body_chunk {
1952 $c->engine->prepare_body_chunk( $c, @_ );
1955 =head2 $c->prepare_body_parameters
1957 Prepares body parameters.
1961 sub prepare_body_parameters {
1963 $c->engine->prepare_body_parameters( $c, @_ );
1966 =head2 $c->prepare_connection
1968 Prepares connection.
1972 sub prepare_connection {
1974 $c->engine->prepare_connection( $c, @_ );
1977 =head2 $c->prepare_cookies
1983 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1985 =head2 $c->prepare_headers
1991 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1993 =head2 $c->prepare_parameters
1995 Prepares parameters.
1999 sub prepare_parameters {
2001 $c->prepare_body_parameters;
2002 $c->engine->prepare_parameters( $c, @_ );
2005 =head2 $c->prepare_path
2007 Prepares path and base.
2011 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2013 =head2 $c->prepare_query_parameters
2015 Prepares query parameters.
2019 sub prepare_query_parameters {
2022 $c->engine->prepare_query_parameters( $c, @_ );
2025 =head2 $c->log_request
2027 Writes information about the request to the debug logs. This includes:
2031 =item * Request method, path, and remote IP address
2033 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2035 =item * Request parameters
2037 =item * File uploads
2046 return unless $c->debug;
2048 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2049 my $request = $dump->[1];
2051 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2053 $path = '/' unless length $path;
2055 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2057 $c->log_request_headers($request->headers);
2059 if ( my $keywords = $request->query_keywords ) {
2060 $c->log->debug("Query keywords are: $keywords");
2063 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2065 $c->log_request_uploads($request);
2068 =head2 $c->log_response
2070 Writes information about the response to the debug logs by calling
2071 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2078 return unless $c->debug;
2080 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2081 my $response = $dump->[1];
2083 $c->log_response_status_line($response);
2084 $c->log_response_headers($response->headers);
2087 =head2 $c->log_response_status_line($response)
2089 Writes one line of information about the response to the debug logs. This includes:
2093 =item * Response status code
2095 =item * Content-Type header (if present)
2097 =item * Content-Length header (if present)
2103 sub log_response_status_line {
2104 my ($c, $response) = @_;
2108 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2109 $response->status || 'unknown',
2110 $response->headers->header('Content-Type') || 'unknown',
2111 $response->headers->header('Content-Length') || 'unknown'
2116 =head2 $c->log_response_headers($headers);
2118 Hook method which can be wrapped by plugins to log the responseheaders.
2119 No-op in the default implementation.
2123 sub log_response_headers {}
2125 =head2 $c->log_request_parameters( query => {}, body => {} )
2127 Logs request parameters to debug logs
2131 sub log_request_parameters {
2133 my %all_params = @_;
2135 return unless $c->debug;
2137 my $column_width = Catalyst::Utils::term_width() - 44;
2138 foreach my $type (qw(query body)) {
2139 my $params = $all_params{$type};
2140 next if ! keys %$params;
2141 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2142 for my $key ( sort keys %$params ) {
2143 my $param = $params->{$key};
2144 my $value = defined($param) ? $param : '';
2145 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2147 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2151 =head2 $c->log_request_uploads
2153 Logs file uploads included in the request to the debug logs.
2154 The parameter name, filename, file type, and file size are all included in
2159 sub log_request_uploads {
2161 my $request = shift;
2162 return unless $c->debug;
2163 my $uploads = $request->uploads;
2164 if ( keys %$uploads ) {
2165 my $t = Text::SimpleTable->new(
2166 [ 12, 'Parameter' ],
2171 for my $key ( sort keys %$uploads ) {
2172 my $upload = $uploads->{$key};
2173 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2174 $t->row( $key, $u->filename, $u->type, $u->size );
2177 $c->log->debug( "File Uploads are:\n" . $t->draw );
2181 =head2 $c->log_request_headers($headers);
2183 Hook method which can be wrapped by plugins to log the request headers.
2184 No-op in the default implementation.
2188 sub log_request_headers {}
2190 =head2 $c->log_headers($type => $headers)
2192 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2199 my $headers = shift; # an HTTP::Headers instance
2201 return unless $c->debug;
2203 my $column_width = Catalyst::Utils::term_width() - 28;
2204 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2207 my ( $name, $value ) = @_;
2208 $t->row( $name, $value );
2211 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2215 =head2 $c->prepare_read
2217 Prepares the input for reading.
2221 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2223 =head2 $c->prepare_request
2225 Prepares the engine request.
2229 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2231 =head2 $c->prepare_uploads
2237 sub prepare_uploads {
2240 $c->engine->prepare_uploads( $c, @_ );
2243 =head2 $c->prepare_write
2245 Prepares the output for writing.
2249 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2251 =head2 $c->request_class
2253 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2255 =head2 $c->response_class
2257 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2259 =head2 $c->read( [$maxlength] )
2261 Reads a chunk of data from the request body. This method is designed to
2262 be used in a while loop, reading C<$maxlength> bytes on every call.
2263 C<$maxlength> defaults to the size of the request if not specified.
2265 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2268 Warning: If you use read(), Catalyst will not process the body,
2269 so you will not be able to access POST parameters or file uploads via
2270 $c->request. You must handle all body parsing yourself.
2274 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2282 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2284 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2286 Sets an action in a given namespace.
2290 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2292 =head2 $c->setup_actions($component)
2294 Sets up actions for a component.
2298 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2300 =head2 $c->setup_config
2307 my %args = %{ $class->config || {} };
2309 my @container_classes = ( "${class}::Container", 'Catalyst::IOC::Container');
2310 unshift @container_classes, delete $args{container_class} if exists $args{container_class};
2312 my $container_class = Class::MOP::load_first_existing_class(@container_classes);
2314 my $container = $container_class->new( %args, name => "$class" );
2315 $class->container($container);
2317 my $config = $container->resolve(service => 'config');
2318 $class->config($config);
2319 $class->finalize_config; # back-compat
2322 =head2 $c->finalize_config
2326 sub finalize_config { }
2328 =head2 $c->setup_components
2330 This method is called internally to set up the application's components.
2332 It finds modules by calling the L<locate_components> method, expands them to
2333 package names with the L<expand_component_module> method, and then installs
2334 each component into the application.
2336 The C<setup_components> config option is passed to both of the above methods.
2338 Installation of each component is performed by the L<setup_component> method,
2343 sub setup_components {
2346 my $config = $class->config->{ setup_components };
2347 my $search_extra = $config->{ search_extra };
2349 my @comps = $class->locate_components($config);
2350 my %comps = map { $_ => 1 } @comps;
2352 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2353 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2354 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2355 ) if $deprecatedcatalyst_component_names;
2357 for my $component ( @comps ) {
2359 # We pass ignore_loaded here so that overlay files for (e.g.)
2360 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2361 # we know M::P::O found a file on disk so this is safe
2363 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2367 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
2369 for my $component (@comps) {
2370 my $instance = $class->setup_component($component);
2371 if ( my ($type, $name) = _get_component_type_name($component, $search_extra) ) {
2372 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $instance } ));
2374 my @expanded_components = $instance->can('expand_modules')
2375 ? $instance->expand_modules( $component, $config )
2376 : $class->expand_component_module( $component, $config );
2377 for my $component (@expanded_components) {
2378 next if $comps{$component};
2380 $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components;
2381 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2382 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2383 ) if $deprecatedcatalyst_component_names;
2385 if (my ($type, $name) = _get_component_type_name($component, $search_extra)) {
2386 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
2391 $containers->{model}->make_single_default;
2392 $containers->{view}->make_single_default;
2395 # FIXME: should this sub exist?
2396 # should it be moved to Catalyst::Utils,
2397 # or replaced by something already existing there?
2398 sub _get_component_type_name {
2399 my ( $component, $search_extra) = @_;
2400 $search_extra ||= [];
2401 my @search_extra = map { s/^:://; lc $_ } @$search_extra;
2403 my @parts = split /::/, $component;
2405 if (scalar @parts == 1) {
2406 return (undef, $component);
2409 while (my $type = shift @parts) {
2410 return ('controller', join '::', @parts)
2411 if $type =~ /^(c|controller)$/i;
2413 return ('model', join '::', @parts)
2414 if $type =~ /^(m|model)$/i;
2416 return ('view', join '::', @parts)
2417 if $type =~ /^(v|view)$/i;
2419 return (_get_component_type($component), join '::', @parts)
2420 if @search_extra and ( grep { lc $type eq $_ } @search_extra );
2424 sub _get_component_type {
2425 my ( $instance ) = @_;
2427 return 'controller' if $instance->isa('Catalyst::Controller');
2428 return 'model' if $instance->isa('Catalyst::Model');
2429 return 'view' if $instance->isa('Catalyst::View');
2432 =head2 $c->locate_components( $setup_component_config )
2434 This method is meant to provide a list of component modules that should be
2435 setup for the application. By default, it will use L<Module::Pluggable>.
2437 Specify a C<setup_components> config option to pass additional options directly
2438 to L<Module::Pluggable>. To add additional search paths, specify a key named
2439 C<search_extra> as an array reference. Items in the array beginning with C<::>
2440 will have the application class name prepended to them.
2444 sub locate_components {
2448 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2449 my $extra = delete $config->{ search_extra } || [];
2451 push @paths, @$extra;
2453 my $locator = Module::Pluggable::Object->new(
2454 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2458 # XXX think about ditching this sort entirely
2459 my @comps = sort { length $a <=> length $b } $locator->plugins;
2464 =head2 $c->expand_component_module( $component, $setup_component_config )
2466 Components found by C<locate_components> will be passed to this method, which
2467 is expected to return a list of component (package) names to be set up.
2471 sub expand_component_module {
2472 my ($class, $module) = @_;
2473 return Devel::InnerPackage::list_packages( $module );
2476 =head2 $c->setup_component
2480 ## FIXME - Why the hell do we try calling the ->COMPONENT method twice, this is madness!?!
2481 sub setup_component {
2482 my( $class, $component ) = @_;
2484 unless ( $component->can( 'COMPONENT' ) ) {
2488 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2489 my $config = $class->config->{ $suffix } || {};
2490 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2491 # methods also pass it. local to avoid pointlessly shitting in config
2492 # for the debug screen, as $component is already the key name.
2493 local $config->{catalyst_component_name} = $component;
2495 my $instance = eval { $component->COMPONENT( $class, $config ); };
2497 if ( my $error = $@ ) {
2499 Catalyst::Exception->throw(
2500 message => qq/Couldn't instantiate component "$component", "$error"/
2503 elsif (!blessed $instance) {
2504 my $metaclass = Moose::Util::find_meta($component);
2505 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2506 my $component_method_from = $method_meta->associated_metaclass->name;
2507 my $value = defined($instance) ? $instance : 'undef';
2508 Catalyst::Exception->throw(
2510 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2517 =head2 $c->setup_dispatcher
2523 sub setup_dispatcher {
2524 my ( $class, $dispatcher ) = @_;
2527 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2530 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2531 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2534 unless ($dispatcher) {
2535 $dispatcher = $class->dispatcher_class;
2538 Class::MOP::load_class($dispatcher);
2540 # dispatcher instance
2541 $class->dispatcher( $dispatcher->new );
2544 =head2 $c->setup_engine
2551 my ( $class, $engine ) = @_;
2554 $engine = 'Catalyst::Engine::' . $engine;
2557 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2558 $engine = 'Catalyst::Engine::' . $env;
2561 if ( $ENV{MOD_PERL} ) {
2562 my $meta = Class::MOP::get_metaclass_by_name($class);
2564 # create the apache method
2565 $meta->add_method('apache' => sub { shift->engine->apache });
2567 my ( $software, $version ) =
2568 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2571 $version =~ s/(\.[^.]+)\./$1/g;
2573 if ( $software eq 'mod_perl' ) {
2577 if ( $version >= 1.99922 ) {
2578 $engine = 'Catalyst::Engine::Apache2::MP20';
2581 elsif ( $version >= 1.9901 ) {
2582 $engine = 'Catalyst::Engine::Apache2::MP19';
2585 elsif ( $version >= 1.24 ) {
2586 $engine = 'Catalyst::Engine::Apache::MP13';
2590 Catalyst::Exception->throw( message =>
2591 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2596 # install the correct mod_perl handler
2597 if ( $version >= 1.9901 ) {
2598 *handler = sub : method {
2599 shift->handle_request(@_);
2603 *handler = sub ($$) { shift->handle_request(@_) };
2608 elsif ( $software eq 'Zeus-Perl' ) {
2609 $engine = 'Catalyst::Engine::Zeus';
2613 Catalyst::Exception->throw(
2614 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2619 $engine = $class->engine_class;
2622 Class::MOP::load_class($engine);
2624 # check for old engines that are no longer compatible
2626 if ( $engine->isa('Catalyst::Engine::Apache')
2627 && !Catalyst::Engine::Apache->VERSION )
2632 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2633 && Catalyst::Engine::Server->VERSION le '0.02' )
2638 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2639 && $engine->VERSION eq '0.01' )
2644 elsif ($engine->isa('Catalyst::Engine::Zeus')
2645 && $engine->VERSION eq '0.01' )
2651 Catalyst::Exception->throw( message =>
2652 qq/Engine "$engine" is not supported by this version of Catalyst/
2657 $class->engine( $engine->new );
2660 =head2 $c->setup_home
2662 Sets up the home directory.
2667 my ( $class, $home ) = @_;
2669 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2673 $home ||= Catalyst::Utils::home($class);
2676 #I remember recently being scolded for assigning config values like this
2677 $class->config->{home} ||= $home;
2678 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2682 =head2 $c->setup_log
2684 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2685 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2688 This method also installs a C<debug> method that returns a true value into the
2689 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2690 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2692 Note that if the log has already been setup, by either a previous call to
2693 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2694 that this method won't actually set up the log object.
2699 my ( $class, $levels ) = @_;
2702 $levels =~ s/^\s+//;
2703 $levels =~ s/\s+$//;
2704 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2706 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2707 if ( defined $env_debug ) {
2708 $levels{debug} = 1 if $env_debug; # Ugly!
2709 delete($levels{debug}) unless $env_debug;
2712 unless ( $class->log ) {
2713 $class->log( Catalyst::Log->new(keys %levels) );
2716 if ( $levels{debug} ) {
2717 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2718 $class->log->debug('Debug messages enabled');
2722 =head2 $c->setup_plugins
2728 =head2 $c->setup_stats
2730 Sets up timing statistics class.
2735 my ( $class, $stats ) = @_;
2737 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2739 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2740 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2741 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2742 $class->log->debug('Statistics enabled');
2747 =head2 $c->registered_plugins
2749 Returns a sorted list of the plugins which have either been stated in the
2750 import list or which have been added via C<< MyApp->plugin(@args); >>.
2752 If passed a given plugin name, it will report a boolean value indicating
2753 whether or not that plugin is loaded. A fully qualified name is required if
2754 the plugin name does not begin with C<Catalyst::Plugin::>.
2756 if ($c->registered_plugins('Some::Plugin')) {
2764 sub registered_plugins {
2766 return sort keys %{ $proto->_plugins } unless @_;
2768 return 1 if exists $proto->_plugins->{$plugin};
2769 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2772 sub _register_plugin {
2773 my ( $proto, $plugin, $instant ) = @_;
2774 my $class = ref $proto || $proto;
2776 Class::MOP::load_class( $plugin );
2777 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2778 if $plugin->isa( 'Catalyst::Component' );
2779 $proto->_plugins->{$plugin} = 1;
2781 my $meta = Class::MOP::get_metaclass_by_name($class);
2782 $meta->superclasses($plugin, $meta->superclasses);
2788 my ( $class, $plugins ) = @_;
2790 $class->_plugins( {} ) unless $class->_plugins;
2791 $plugins = Data::OptList::mkopt($plugins || []);
2794 [ Catalyst::Utils::resolve_namespace(
2795 $class . '::Plugin',
2796 'Catalyst::Plugin', $_->[0]
2802 for my $plugin ( reverse @plugins ) {
2803 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2804 my $meta = find_meta($plugin->[0]);
2805 next if $meta && $meta->isa('Moose::Meta::Role');
2807 $class->_register_plugin($plugin->[0]);
2811 map { $_->[0]->name, $_->[1] }
2812 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2813 map { [find_meta($_->[0]), $_->[1]] }
2816 Moose::Util::apply_all_roles(
2824 Returns an arrayref of the internal execution stack (actions that are
2825 currently executing).
2829 Returns the current timing statistics object. By default Catalyst uses
2830 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2831 L<< stats_class|/"$c->stats_class" >>.
2833 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2834 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2835 profile explicitly, although MyApp.pm still won't profile nor output anything
2838 =head2 $c->stats_class
2840 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2842 =head2 $c->use_stats
2844 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2846 Note that this is a static method, not an accessor and should be overridden
2847 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2854 =head2 $c->write( $data )
2856 Writes $data to the output stream. When using this method directly, you
2857 will need to manually set the C<Content-Length> header to the length of
2858 your output data, if known.
2865 # Finalize headers if someone manually writes output
2866 $c->finalize_headers;
2868 return $c->engine->write( $c, @_ );
2873 Returns the Catalyst version number. Mostly useful for "powered by"
2874 messages in template systems.
2878 sub version { return $Catalyst::VERSION }
2880 =head1 CONFIGURATION
2882 There are a number of 'base' config variables which can be set:
2888 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2892 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
2896 C<home> - The application home directory. In an uninstalled application,
2897 this is the top level application directory. In an installed application,
2898 this will be the directory containing C<< MyApp.pm >>.
2902 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
2906 C<name> - The name of the application in debug messages and the debug and
2911 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
2912 until it is accessed. This allows you to (for example) check authentication (and reject
2913 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
2917 C<root> - The root directory for templates. Usually this is just a
2918 subdirectory of the home directory, but you can set it to change the
2919 templates to a different directory.
2923 C<search_extra> - Array reference passed to Module::Pluggable to for additional
2924 namespaces from which components will be loaded (and constructed and stored in
2925 C<< $c->components >>).
2929 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
2930 to be shown in hit debug tables in the test server.
2934 C<use_request_uri_for_path> - Controlls if the C<REQUEST_URI> or C<PATH_INFO> environment
2935 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
2936 for more information.
2940 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
2944 =head1 INTERNAL ACTIONS
2946 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2947 C<_ACTION>, and C<_END>. These are by default not shown in the private
2948 action table, but you can make them visible with a config parameter.
2950 MyApp->config(show_internal_actions => 1);
2952 =head1 ON-DEMAND PARSER
2954 The request body is usually parsed at the beginning of a request,
2955 but if you want to handle input yourself, you can enable on-demand
2956 parsing with a config parameter.
2958 MyApp->config(parse_on_demand => 1);
2960 =head1 PROXY SUPPORT
2962 Many production servers operate using the common double-server approach,
2963 with a lightweight frontend web server passing requests to a larger
2964 backend server. An application running on the backend server must deal
2965 with two problems: the remote user always appears to be C<127.0.0.1> and
2966 the server's hostname will appear to be C<localhost> regardless of the
2967 virtual host that the user connected through.
2969 Catalyst will automatically detect this situation when you are running
2970 the frontend and backend servers on the same machine. The following
2971 changes are made to the request.
2973 $c->req->address is set to the user's real IP address, as read from
2974 the HTTP X-Forwarded-For header.
2976 The host value for $c->req->base and $c->req->uri is set to the real
2977 host, as read from the HTTP X-Forwarded-Host header.
2979 Additionally, you may be running your backend application on an insecure
2980 connection (port 80) while your frontend proxy is running under SSL. If there
2981 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
2982 tell Catalyst what port the frontend listens on. This will allow all URIs to
2983 be created properly.
2985 In the case of passing in:
2987 X-Forwarded-Port: 443
2989 All calls to C<uri_for> will result in an https link, as is expected.
2991 Obviously, your web server must support these headers for this to work.
2993 In a more complex server farm environment where you may have your
2994 frontend proxy server(s) on different machines, you will need to set a
2995 configuration option to tell Catalyst to read the proxied data from the
2998 MyApp->config(using_frontend_proxy => 1);
3000 If you do not wish to use the proxy support at all, you may set:
3002 MyApp->config(ignore_frontend_proxy => 1);
3004 =head1 THREAD SAFETY
3006 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3007 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3008 believe the Catalyst core to be thread-safe.
3010 If you plan to operate in a threaded environment, remember that all other
3011 modules you are using must also be thread-safe. Some modules, most notably
3012 L<DBD::SQLite>, are not thread-safe.
3018 Join #catalyst on irc.perl.org.
3022 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3023 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3027 http://catalyst.perl.org
3031 http://dev.catalyst.perl.org
3035 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3037 =head2 L<Catalyst::Manual> - The Catalyst Manual
3039 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3041 =head2 L<Catalyst::Engine> - Core engine
3043 =head2 L<Catalyst::Log> - Log class.
3045 =head2 L<Catalyst::Request> - Request object
3047 =head2 L<Catalyst::Response> - Response object
3049 =head2 L<Catalyst::Test> - The test suite.
3051 =head1 PROJECT FOUNDER
3053 sri: Sebastian Riedel <sri@cpan.org>
3059 acme: Leon Brocard <leon@astray.com>
3061 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3065 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3071 andyg: Andy Grundman <andy@hybridized.org>
3073 audreyt: Audrey Tang
3075 bricas: Brian Cassidy <bricas@cpan.org>
3077 Caelum: Rafael Kitover <rkitover@io.com>
3079 chansen: Christian Hansen
3081 chicks: Christopher Hicks
3083 Chisel Wright C<pause@herlpacker.co.uk>
3085 Danijel Milicevic C<me@danijel.de>
3087 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3089 David Naughton, C<naughton@umn.edu>
3093 dhoss: Devin Austin <dhoss@cpan.org>
3095 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3099 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3101 esskar: Sascha Kiefer
3103 fireartist: Carl Franks <cfranks@cpan.org>
3105 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3107 gabb: Danijel Milicevic
3111 Gavin Henry C<ghenry@perl.me.uk>
3115 groditi: Guillermo Roditi <groditi@gmail.com>
3117 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3119 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3121 jcamacho: Juan Camacho
3123 jester: Jesse Sheidlower C<jester@panix.com>
3125 jhannah: Jay Hannah <jay@jays.net>
3131 jon: Jon Schutz <jjschutz@cpan.org>
3133 Jonathan Rockway C<< <jrockway@cpan.org> >>
3135 Kieren Diment C<kd@totaldatasolution.com>
3137 konobi: Scott McWhirter <konobi@cpan.org>
3139 marcus: Marcus Ramberg <mramberg@cpan.org>
3141 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3143 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3147 naughton: David Naughton
3149 ningu: David Kamholz <dkamholz@cpan.org>
3151 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3153 numa: Dan Sully <daniel@cpan.org>
3159 omega: Andreas Marienborg
3161 Oleg Kostyuk <cub.uanic@gmail.com>
3163 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3165 rafl: Florian Ragwitz <rafl@debian.org>
3167 random: Roland Lammel <lammel@cpan.org>
3169 Robert Sedlacek C<< <rs@474.at> >>
3171 SpiceMan: Marcel Montes
3175 szbalint: Balint Szilakszi <szbalint@cpan.org>
3177 t0m: Tomas Doran <bobtfish@bobtfish.net>
3181 Viljo Marrandi C<vilts@yahoo.com>
3183 Will Hawes C<info@whawes.co.uk>
3185 willert: Sebastian Willert <willert@cpan.org>
3187 wreis: Wallace Reis <wallace@reis.org.br>
3189 Yuval Kogman, C<nothingmuch@woobling.org>
3191 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3193 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3197 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3201 This library is free software. You can redistribute it and/or modify it under
3202 the same terms as Perl itself.
3208 __PACKAGE__->meta->make_immutable;