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 ) = @_;
561 # FIXME: should this be a Catalyst::Utils method?
563 my $class = $c->action->class;
565 my $prefix = length Catalyst::Utils::class2classprefix($class);
567 # MyApp::Controller::Foo becomes Foo
568 # the + 2 is because of the ::
569 $name = substr $class, $prefix + 2;
572 return $c->container->get_component_from_sub_container( 'controller', $name, $c, @args);
575 =head2 $c->model($name)
577 Gets a L<Catalyst::Model> instance by name.
579 $c->model('Foo')->do_stuff;
581 Any extra arguments are directly passed to ACCEPT_CONTEXT.
583 If the name is omitted, it will look for
584 - a model object in $c->stash->{current_model_instance}, then
585 - a model name in $c->stash->{current_model}, then
586 - a config setting 'default_model', or
587 - check if there is only one model, and return it if that's the case.
589 If you want to search for models, pass in a regexp as the argument.
591 # find all models that start with Foo
592 my @foo_models = $c->model(qr{^Foo});
597 my ( $c, $name, @args ) = @_;
599 if (ref $c && !$name) {
600 return $c->stash->{current_model_instance}
601 if $c->stash->{current_model_instance};
603 $name = $c->stash->{current_model}
604 if $c->stash->{current_model};
607 return $c->container->get_component_from_sub_container( 'model', $name, $c, @args);
611 =head2 $c->view($name)
613 Gets a L<Catalyst::View> instance by name.
615 $c->view('Foo')->do_stuff;
617 Any extra arguments are directly passed to ACCEPT_CONTEXT.
619 If the name is omitted, it will look for
620 - a view object in $c->stash->{current_view_instance}, then
621 - a view name in $c->stash->{current_view}, then
622 - a config setting 'default_view', or
623 - check if there is only one view, and return it if that's the case.
625 If you want to search for views, pass in a regexp as the argument.
627 # find all views that start with Foo
628 my @foo_views = $c->view(qr{^Foo});
633 my ( $c, $name, @args ) = @_;
635 if (ref $c && !$name) {
636 return $c->stash->{current_view_instance}
637 if $c->stash->{current_view_instance};
639 $name = $c->stash->{current_view}
640 if $c->stash->{current_view};
643 return $c->container->get_component_from_sub_container( 'view', $name, $c, @args);
646 =head2 $c->controllers
648 Returns the available names which can be passed to $c->controller
654 return $c->container->get_sub_container('controller')->get_service_list;
659 Returns the available names which can be passed to $c->model
665 return $c->container->get_sub_container('model')->get_service_list;
671 Returns the available names which can be passed to $c->view
677 return $c->container->get_sub_container('view')->get_service_list;
680 =head2 $c->comp($name)
682 =head2 $c->component($name)
684 Gets a component object by name. This method is not recommended,
685 unless you want to get a specific component by full
686 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
687 should be used instead.
689 If C<$name> is a regexp, a list of components matched against the full
690 component name will be returned.
695 my ( $c, $component, @args ) = @_;
698 # FIXME: I probably shouldn't be doing this
699 return $c->components->{$component}
700 if exists $c->components->{$component};
702 my ($type, $name) = _get_component_type_name($component);
704 if ($type && $c->container->has_sub_container($type)) {
705 my $container = $c->container->get_sub_container($type);
707 if( !ref $component && $container->has_service($name) ) {
708 return $container->get_component( $name, $c, @args );
711 return $container->get_component_regexp( $name, $c, @args );
714 if (ref $component) {
715 for my $subcontainer_name (qw/model view controller/) {
716 my $subcontainer = $c->container->get_sub_container($subcontainer_name);
717 my @components = $subcontainer->get_service_list;
718 my @result = grep { m{$component} } @components;
720 return map { $subcontainer->get_component( $_, $c, @args ) } @result;
724 $c->log->warn("Looking for '$component', but nothing was found.");
726 # I would expect to return an empty list here, but that breaks back-compat
730 return sort keys %{ $c->components };
733 =head2 CLASS DATA AND HELPER CLASSES
737 Returns or takes a hashref containing the application's configuration.
739 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
741 You can also use a C<YAML>, C<XML> or L<Config::General> config file
742 like C<myapp.conf> in your applications home directory. See
743 L<Catalyst::Plugin::ConfigLoader>.
745 =head3 Cascading configuration
747 The config method is present on all Catalyst components, and configuration
748 will be merged when an application is started. Configuration loaded with
749 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
750 followed by configuration in your top level C<MyApp> class. These two
751 configurations are merged, and then configuration data whose hash key matches a
752 component name is merged with configuration for that component.
754 The configuration for a component is then passed to the C<new> method when a
755 component is constructed.
759 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
760 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
762 will mean that C<MyApp::Model::Foo> receives the following data when
765 MyApp::Model::Foo->new({
771 It's common practice to use a Moose attribute
772 on the receiving component to access the config value.
774 package MyApp::Model::Foo;
778 # this attr will receive 'baz' at construction time
784 You can then get the value 'baz' by calling $c->model('Foo')->bar
785 (or $self->bar inside code in the model).
787 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
788 as a way of reading config within your code, as this B<will not> give you the
789 correctly merged config back. You B<MUST> take the config values supplied to
790 the constructor and use those instead.
794 around config => sub {
798 croak('Setting config after setup has been run is not allowed.')
799 if ( @_ and $c->setup_finished );
806 Returns the logging object instance. Unless it is already set, Catalyst
807 sets this up with a L<Catalyst::Log> object. To use your own log class,
808 set the logger with the C<< __PACKAGE__->log >> method prior to calling
809 C<< __PACKAGE__->setup >>.
811 __PACKAGE__->log( MyLogger->new );
816 $c->log->info( 'Now logging with my own logger!' );
818 Your log class should implement the methods described in
824 Returns 1 if debug mode is enabled, 0 otherwise.
826 You can enable debug mode in several ways:
830 =item By calling myapp_server.pl with the -d flag
832 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
834 =item The -Debug option in your MyApp.pm
836 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
840 The first three also set the log level to 'debug'.
842 Calling C<< $c->debug(1) >> has no effect.
848 =head2 $c->dispatcher
850 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
854 Returns the engine instance. See L<Catalyst::Engine>.
857 =head2 UTILITY METHODS
859 =head2 $c->path_to(@path)
861 Merges C<@path> with C<< $c->config->{home} >> and returns a
862 L<Path::Class::Dir> object. Note you can usually use this object as
863 a filename, but sometimes you will have to explicitly stringify it
864 yourself by calling the C<< ->stringify >> method.
868 $c->path_to( 'db', 'sqlite.db' );
873 my ( $c, @path ) = @_;
874 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
875 if ( -d $path ) { return $path }
876 else { return Path::Class::File->new( $c->config->{home}, @path ) }
879 =head2 $c->plugin( $name, $class, @args )
881 Helper method for plugins. It creates a class data accessor/mutator and
882 loads and instantiates the given class.
884 MyApp->plugin( 'prototype', 'HTML::Prototype' );
886 $c->prototype->define_javascript_functions;
888 B<Note:> This method of adding plugins is deprecated. The ability
889 to add plugins like this B<will be removed> in a Catalyst 5.81.
890 Please do not use this functionality in new code.
895 my ( $class, $name, $plugin, @args ) = @_;
897 # See block comment in t/unit_core_plugin.t
898 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
900 $class->_register_plugin( $plugin, 1 );
902 eval { $plugin->import };
903 $class->mk_classdata($name);
905 eval { $obj = $plugin->new(@args) };
908 Catalyst::Exception->throw( message =>
909 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
913 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
919 Initializes the dispatcher and engine, loads any plugins, and loads the
920 model, view, and controller components. You may also specify an array
921 of plugins to load here, if you choose to not load them in the C<use
925 MyApp->setup( qw/-Debug/ );
930 my ( $class, @arguments ) = @_;
931 croak('Running setup more than once')
932 if ( $class->setup_finished );
934 unless ( $class->isa('Catalyst') ) {
936 Catalyst::Exception->throw(
937 message => qq/'$class' does not inherit from Catalyst/ );
940 if ( $class->arguments ) {
941 @arguments = ( @arguments, @{ $class->arguments } );
947 foreach (@arguments) {
951 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
953 elsif (/^-(\w+)=?(.*)$/) {
954 $flags->{ lc $1 } = $2;
957 push @{ $flags->{plugins} }, $_;
961 $class->setup_config();
962 $class->setup_home( delete $flags->{home} );
964 $class->setup_log( delete $flags->{log} );
965 $class->setup_plugins( delete $flags->{plugins} );
966 $class->setup_dispatcher( delete $flags->{dispatcher} );
967 $class->setup_engine( delete $flags->{engine} );
968 $class->setup_stats( delete $flags->{stats} );
970 for my $flag ( sort keys %{$flags} ) {
972 if ( my $code = $class->can( 'setup_' . $flag ) ) {
973 &$code( $class, delete $flags->{$flag} );
976 $class->log->warn(qq/Unknown flag "$flag"/);
980 eval { require Catalyst::Devel; };
981 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
982 $class->log->warn(<<"EOF");
983 You are running an old script!
985 Please update by running (this will overwrite existing files):
986 catalyst.pl -force -scripts $class
988 or (this will not overwrite existing files):
989 catalyst.pl -scripts $class
994 if ( $class->debug ) {
995 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
998 my $column_width = Catalyst::Utils::term_width() - 6;
999 my $t = Text::SimpleTable->new($column_width);
1000 $t->row($_) for @plugins;
1001 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1004 my $dispatcher = $class->dispatcher;
1005 my $engine = $class->engine;
1006 my $home = $class->config->{home};
1008 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1009 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1013 ? $class->log->debug(qq/Found home "$home"/)
1014 : $class->log->debug(qq/Home "$home" doesn't exist/)
1015 : $class->log->debug(q/Couldn't find home/);
1018 # Call plugins setup, this is stupid and evil.
1019 # Also screws C3 badly on 5.10, hack to avoid.
1021 no warnings qw/redefine/;
1022 local *setup = sub { };
1023 $class->setup unless $Catalyst::__AM_RESTARTING;
1026 # Initialize our data structure
1027 $class->components( {} );
1029 $class->setup_components;
1031 if ( $class->debug ) {
1032 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1033 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1034 for my $comp ( sort keys %{ $class->components } ) {
1035 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1036 $t->row( $comp, $type );
1038 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1039 if ( keys %{ $class->components } );
1042 # Add our self to components, since we are also a component
1043 if( $class->isa('Catalyst::Controller') ){
1044 $class->components->{$class} = $class;
1047 $class->setup_actions;
1049 if ( $class->debug ) {
1050 my $name = $class->config->{name} || 'Application';
1051 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1054 # Make sure that the application class becomes immutable at this point,
1055 B::Hooks::EndOfScope::on_scope_end {
1057 my $meta = Class::MOP::get_metaclass_by_name($class);
1060 && ! { $meta->immutable_options }->{replace_constructor}
1062 $class->isa('Class::Accessor::Fast')
1063 || $class->isa('Class::Accessor')
1066 warn "You made your application class ($class) immutable, "
1067 . "but did not inline the\nconstructor. "
1068 . "This will break catalyst, as your app \@ISA "
1069 . "Class::Accessor(::Fast)?\nPlease pass "
1070 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1072 $meta->make_immutable(
1073 replace_constructor => 1,
1074 ) unless $meta->is_immutable;
1077 if ($class->config->{case_sensitive}) {
1078 $class->log->warn($class . "->config->{case_sensitive} is set.");
1079 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1082 $class->setup_finalize;
1083 # Should be the last thing we do so that user things hooking
1084 # setup_finalize can log..
1085 $class->log->_flush() if $class->log->can('_flush');
1086 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1089 =head2 $app->setup_finalize
1091 A hook to attach modifiers to. This method does not do anything except set the
1092 C<setup_finished> accessor.
1094 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1098 after setup_finalize => sub {
1106 sub setup_finalize {
1108 $class->setup_finished(1);
1111 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1113 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1115 Constructs an absolute L<URI> object based on the application root, the
1116 provided path, and the additional arguments and query parameters provided.
1117 When used as a string, provides a textual URI. If you need more flexibility
1118 than this (i.e. the option to provide relative URIs etc.) see
1119 L<Catalyst::Plugin::SmartURI>.
1121 If no arguments are provided, the URI for the current action is returned.
1122 To return the current action and also provide @args, use
1123 C<< $c->uri_for( $c->action, @args ) >>.
1125 If the first argument is a string, it is taken as a public URI path relative
1126 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1127 relative to the application root (if it does). It is then merged with
1128 C<< $c->request->base >>; any C<@args> are appended as additional path
1129 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1131 If the first argument is a L<Catalyst::Action> it represents an action which
1132 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1133 optional C<\@captures> argument (an arrayref) allows passing the captured
1134 variables that are needed to fill in the paths of Chained and Regex actions;
1135 once the path is resolved, C<uri_for> continues as though a path was
1136 provided, appending any arguments or parameters and creating an absolute
1139 The captures for the current request can be found in
1140 C<< $c->request->captures >>, and actions can be resolved using
1141 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1142 path, use C<< $c->uri_for_action >> instead.
1144 # Equivalent to $c->req->uri
1145 $c->uri_for($c->action, $c->req->captures,
1146 @{ $c->req->args }, $c->req->params);
1148 # For the Foo action in the Bar controller
1149 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1151 # Path to a static resource
1152 $c->uri_for('/static/images/logo.png');
1157 my ( $c, $path, @args ) = @_;
1159 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1160 $path = $path->path_prefix;
1165 undef($path) if (defined $path && $path eq '');
1168 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1170 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1171 foreach my $arg (@args) {
1172 utf8::encode($arg) if utf8::is_utf8($arg);
1173 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1176 if ( blessed($path) ) { # action object
1177 s|/|%2F|g for @args;
1178 my $captures = [ map { s|/|%2F|g; $_; }
1179 ( scalar @args && ref $args[0] eq 'ARRAY'
1183 foreach my $capture (@$captures) {
1184 utf8::encode($capture) if utf8::is_utf8($capture);
1185 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1189 $path = $c->dispatcher->uri_for_action($action, $captures);
1190 if (not defined $path) {
1191 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1195 $path = '/' if $path eq '';
1198 unshift(@args, $path);
1200 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1201 my $namespace = $c->namespace;
1202 if (defined $path) { # cheesy hack to handle path '../foo'
1203 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1205 unshift(@args, $namespace || '');
1208 # join args with '/', or a blank string
1209 my $args = join('/', grep { defined($_) } @args);
1210 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1212 my $base = $c->req->base;
1213 my $class = ref($base);
1214 $base =~ s{(?<!/)$}{/};
1218 if (my @keys = keys %$params) {
1219 # somewhat lifted from URI::_query's query_form
1220 $query = '?'.join('&', map {
1221 my $val = $params->{$_};
1222 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1225 $val = '' unless defined $val;
1228 utf8::encode( $param ) if utf8::is_utf8($param);
1229 # using the URI::Escape pattern here so utf8 chars survive
1230 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1232 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1236 my $res = bless(\"${base}${args}${query}", $class);
1240 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1242 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1248 A private path to the Catalyst action you want to create a URI for.
1250 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1251 >> and passing the resulting C<$action> and the remaining arguments to C<<
1254 You can also pass in a Catalyst::Action object, in which case it is passed to
1257 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.
1259 For example, if the action looks like:
1261 package MyApp::Controller::Users;
1263 sub lst : Path('the-list') {}
1267 $c->uri_for_action('/users/lst')
1269 and it will create the URI /users/the-list.
1275 sub uri_for_action {
1276 my ( $c, $path, @args ) = @_;
1277 my $action = blessed($path)
1279 : $c->dispatcher->get_action_by_path($path);
1280 unless (defined $action) {
1281 croak "Can't find action for path '$path'";
1283 return $c->uri_for( $action, @args );
1286 =head2 $c->welcome_message
1288 Returns the Catalyst welcome HTML page.
1292 sub welcome_message {
1294 my $name = $c->config->{name};
1295 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1296 my $prefix = Catalyst::Utils::appprefix( ref $c );
1297 $c->response->content_type('text/html; charset=utf-8');
1299 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1300 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1301 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1303 <meta http-equiv="Content-Language" content="en" />
1304 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1305 <title>$name on Catalyst $VERSION</title>
1306 <style type="text/css">
1309 background-color: #eee;
1316 margin-bottom: 10px;
1318 background-color: #ccc;
1319 border: 1px solid #aaa;
1324 font-family: verdana, tahoma, sans-serif;
1327 font-family: verdana, tahoma, sans-serif;
1330 text-decoration: none;
1332 border-bottom: 1px dotted #bbb;
1334 :link:hover, :visited:hover {
1347 background-color: #fff;
1348 border: 1px solid #aaa;
1352 font-weight: normal;
1374 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1379 <img src="$logo" alt="Catalyst Logo" />
1381 <p>Welcome to the world of Catalyst.
1382 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1383 framework will make web development something you had
1384 never expected it to be: Fun, rewarding, and quick.</p>
1385 <h2>What to do now?</h2>
1386 <p>That really depends on what <b>you</b> want to do.
1387 We do, however, provide you with a few starting points.</p>
1388 <p>If you want to jump right into web development with Catalyst
1389 you might want to start with a tutorial.</p>
1390 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1392 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1394 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1395 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1397 <h2>What to do next?</h2>
1398 <p>Next it's time to write an actual application. Use the
1399 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1400 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1401 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1402 they can save you a lot of work.</p>
1403 <pre><code>script/${prefix}_create.pl --help</code></pre>
1404 <p>Also, be sure to check out the vast and growing
1405 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1406 you are likely to find what you need there.
1410 <p>Catalyst has a very active community. Here are the main places to
1411 get in touch with us.</p>
1414 <a href="http://dev.catalyst.perl.org">Wiki</a>
1417 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1420 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1423 <h2>In conclusion</h2>
1424 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1425 as we enjoyed making it. Please contact us if you have ideas
1426 for improvement or other feedback.</p>
1434 =head1 INTERNAL METHODS
1436 These methods are not meant to be used by end users.
1438 =head2 $c->components
1440 Returns a hash of components.
1444 around components => sub {
1449 return $class->$orig if ( !$comps );
1451 # FIXME: should this ugly kludge exist?
1452 $class->setup_config unless defined $class->container;
1454 # FIXME: should there be a warning here, not to use this accessor to create the components?
1455 my $components = {};
1458 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
1460 for my $component ( keys %$comps ) {
1461 $components->{ $component } = $comps->{$component};
1463 my ($type, $name) = _get_component_type_name($component);
1465 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
1468 return $class->$orig($components);
1471 =head2 $c->context_class
1473 Returns or sets the context class.
1477 Returns a hashref containing coderefs and execution counts (needed for
1478 deep recursion detection).
1482 Returns the number of actions on the current internal execution stack.
1486 Dispatches a request to actions.
1490 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1492 =head2 $c->dispatcher_class
1494 Returns or sets the dispatcher class.
1496 =head2 $c->dump_these
1498 Returns a list of 2-element array references (name, structure) pairs
1499 that will be dumped on the error page in debug mode.
1505 [ Request => $c->req ],
1506 [ Response => $c->res ],
1507 [ Stash => $c->stash ],
1508 [ Config => $c->config ];
1511 =head2 $c->engine_class
1513 Returns or sets the engine class.
1515 =head2 $c->execute( $class, $coderef )
1517 Execute a coderef in given class and catch exceptions. Errors are available
1523 my ( $c, $class, $code ) = @_;
1524 $class = $c->component($class) || $class;
1527 if ( $c->depth >= $RECURSION ) {
1528 my $action = $code->reverse();
1529 $action = "/$action" unless $action =~ /->/;
1530 my $error = qq/Deep recursion detected calling "${action}"/;
1531 $c->log->error($error);
1537 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1539 push( @{ $c->stack }, $code );
1541 no warnings 'recursion';
1542 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1543 # I have no idea how, ergo $ret (which appears to fix the issue)
1544 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1546 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1548 my $last = pop( @{ $c->stack } );
1550 if ( my $error = $@ ) {
1551 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1552 $error->rethrow if $c->depth > 1;
1554 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1555 $error->rethrow if $c->depth > 0;
1558 unless ( ref $error ) {
1559 no warnings 'uninitialized';
1561 my $class = $last->class;
1562 my $name = $last->name;
1563 $error = qq/Caught exception in $class->$name "$error"/;
1572 sub _stats_start_execute {
1573 my ( $c, $code ) = @_;
1574 my $appclass = ref($c) || $c;
1575 return if ( ( $code->name =~ /^_.*/ )
1576 && ( !$appclass->config->{show_internal_actions} ) );
1578 my $action_name = $code->reverse();
1579 $c->counter->{$action_name}++;
1581 my $action = $action_name;
1582 $action = "/$action" unless $action =~ /->/;
1584 # determine if the call was the result of a forward
1585 # this is done by walking up the call stack and looking for a calling
1586 # sub of Catalyst::forward before the eval
1588 for my $index ( 2 .. 11 ) {
1590 if ( ( caller($index) )[0] eq 'Catalyst'
1591 && ( caller($index) )[3] eq '(eval)' );
1593 if ( ( caller($index) )[3] =~ /forward$/ ) {
1594 $callsub = ( caller($index) )[3];
1595 $action = "-> $action";
1600 my $uid = $action_name . $c->counter->{$action_name};
1602 # is this a root-level call or a forwarded call?
1603 if ( $callsub =~ /forward$/ ) {
1604 my $parent = $c->stack->[-1];
1606 # forward, locate the caller
1607 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1610 parent => "$parent" . $c->counter->{"$parent"},
1616 # forward with no caller may come from a plugin
1635 sub _stats_finish_execute {
1636 my ( $c, $info ) = @_;
1637 $c->stats->profile( end => $info );
1642 Finalizes the request.
1649 for my $error ( @{ $c->error } ) {
1650 $c->log->error($error);
1653 # Allow engine to handle finalize flow (for POE)
1654 my $engine = $c->engine;
1655 if ( my $code = $engine->can('finalize') ) {
1660 $c->finalize_uploads;
1663 if ( $#{ $c->error } >= 0 ) {
1667 $c->finalize_headers;
1670 if ( $c->request->method eq 'HEAD' ) {
1671 $c->response->body('');
1679 if ($c->use_stats) {
1680 my $elapsed = sprintf '%f', $c->stats->elapsed;
1681 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1683 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1686 return $c->response->status;
1689 =head2 $c->finalize_body
1695 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1697 =head2 $c->finalize_cookies
1703 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1705 =head2 $c->finalize_error
1711 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1713 =head2 $c->finalize_headers
1719 sub finalize_headers {
1722 my $response = $c->response; #accessor calls can add up?
1724 # Check if we already finalized headers
1725 return if $response->finalized_headers;
1728 if ( my $location = $response->redirect ) {
1729 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1730 $response->header( Location => $location );
1732 if ( !$response->has_body ) {
1733 # Add a default body if none is already present
1735 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1741 if ( defined $response->body && length $response->body && !$response->content_length ) {
1743 # get the length from a filehandle
1744 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1746 my $stat = stat $response->body;
1747 if ( $stat && $stat->size > 0 ) {
1748 $response->content_length( $stat->size );
1751 $c->log->warn('Serving filehandle without a content-length');
1755 # everything should be bytes at this point, but just in case
1756 $response->content_length( length( $response->body ) );
1761 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1762 $response->headers->remove_header("Content-Length");
1763 $response->body('');
1766 $c->finalize_cookies;
1768 $c->engine->finalize_headers( $c, @_ );
1771 $response->finalized_headers(1);
1774 =head2 $c->finalize_output
1776 An alias for finalize_body.
1778 =head2 $c->finalize_read
1780 Finalizes the input after reading is complete.
1784 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1786 =head2 $c->finalize_uploads
1788 Finalizes uploads. Cleans up any temporary files.
1792 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1794 =head2 $c->get_action( $action, $namespace )
1796 Gets an action in a given namespace.
1800 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1802 =head2 $c->get_actions( $action, $namespace )
1804 Gets all actions of a given name in a namespace and all parent
1809 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1811 =head2 $app->handle_request( @arguments )
1813 Called to handle each HTTP request.
1817 sub handle_request {
1818 my ( $class, @arguments ) = @_;
1820 # Always expect worst case!
1823 if ($class->debug) {
1824 my $secs = time - $START || 1;
1825 my $av = sprintf '%.3f', $COUNT / $secs;
1826 my $time = localtime time;
1827 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1830 my $c = $class->prepare(@arguments);
1832 $status = $c->finalize;
1835 if ( my $error = $@ ) {
1837 $class->log->error(qq/Caught exception in engine "$error"/);
1842 if(my $coderef = $class->log->can('_flush')){
1843 $class->log->$coderef();
1848 =head2 $c->prepare( @arguments )
1850 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1856 my ( $class, @arguments ) = @_;
1859 # After the app/ctxt split, this should become an attribute based on something passed
1860 # into the application.
1861 $class->context_class( ref $class || $class ) unless $class->context_class;
1863 my $c = $class->context_class->new({});
1865 # For on-demand data
1866 $c->request->_context($c);
1867 $c->response->_context($c);
1869 #surely this is not the most efficient way to do things...
1870 $c->stats($class->stats_class->new)->enable($c->use_stats);
1871 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
1872 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1875 #XXX reuse coderef from can
1876 # Allow engine to direct the prepare flow (for POE)
1877 if ( $c->engine->can('prepare') ) {
1878 $c->engine->prepare( $c, @arguments );
1881 $c->prepare_request(@arguments);
1882 $c->prepare_connection;
1883 $c->prepare_query_parameters;
1884 $c->prepare_headers;
1885 $c->prepare_cookies;
1888 # Prepare the body for reading, either by prepare_body
1889 # or the user, if they are using $c->read
1892 # Parse the body unless the user wants it on-demand
1893 unless ( ref($c)->config->{parse_on_demand} ) {
1898 my $method = $c->req->method || '';
1899 my $path = $c->req->path;
1900 $path = '/' unless length $path;
1901 my $address = $c->req->address || '';
1910 =head2 $c->prepare_action
1912 Prepares action. See L<Catalyst::Dispatcher>.
1916 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1918 =head2 $c->prepare_body
1920 Prepares message body.
1927 return if $c->request->_has_body;
1929 # Initialize on-demand data
1930 $c->engine->prepare_body( $c, @_ );
1931 $c->prepare_parameters;
1932 $c->prepare_uploads;
1935 =head2 $c->prepare_body_chunk( $chunk )
1937 Prepares a chunk of data before sending it to L<HTTP::Body>.
1939 See L<Catalyst::Engine>.
1943 sub prepare_body_chunk {
1945 $c->engine->prepare_body_chunk( $c, @_ );
1948 =head2 $c->prepare_body_parameters
1950 Prepares body parameters.
1954 sub prepare_body_parameters {
1956 $c->engine->prepare_body_parameters( $c, @_ );
1959 =head2 $c->prepare_connection
1961 Prepares connection.
1965 sub prepare_connection {
1967 $c->engine->prepare_connection( $c, @_ );
1970 =head2 $c->prepare_cookies
1976 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1978 =head2 $c->prepare_headers
1984 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1986 =head2 $c->prepare_parameters
1988 Prepares parameters.
1992 sub prepare_parameters {
1994 $c->prepare_body_parameters;
1995 $c->engine->prepare_parameters( $c, @_ );
1998 =head2 $c->prepare_path
2000 Prepares path and base.
2004 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2006 =head2 $c->prepare_query_parameters
2008 Prepares query parameters.
2012 sub prepare_query_parameters {
2015 $c->engine->prepare_query_parameters( $c, @_ );
2018 =head2 $c->log_request
2020 Writes information about the request to the debug logs. This includes:
2024 =item * Request method, path, and remote IP address
2026 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2028 =item * Request parameters
2030 =item * File uploads
2039 return unless $c->debug;
2041 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2042 my $request = $dump->[1];
2044 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2046 $path = '/' unless length $path;
2048 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2050 $c->log_request_headers($request->headers);
2052 if ( my $keywords = $request->query_keywords ) {
2053 $c->log->debug("Query keywords are: $keywords");
2056 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2058 $c->log_request_uploads($request);
2061 =head2 $c->log_response
2063 Writes information about the response to the debug logs by calling
2064 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2071 return unless $c->debug;
2073 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2074 my $response = $dump->[1];
2076 $c->log_response_status_line($response);
2077 $c->log_response_headers($response->headers);
2080 =head2 $c->log_response_status_line($response)
2082 Writes one line of information about the response to the debug logs. This includes:
2086 =item * Response status code
2088 =item * Content-Type header (if present)
2090 =item * Content-Length header (if present)
2096 sub log_response_status_line {
2097 my ($c, $response) = @_;
2101 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2102 $response->status || 'unknown',
2103 $response->headers->header('Content-Type') || 'unknown',
2104 $response->headers->header('Content-Length') || 'unknown'
2109 =head2 $c->log_response_headers($headers);
2111 Hook method which can be wrapped by plugins to log the responseheaders.
2112 No-op in the default implementation.
2116 sub log_response_headers {}
2118 =head2 $c->log_request_parameters( query => {}, body => {} )
2120 Logs request parameters to debug logs
2124 sub log_request_parameters {
2126 my %all_params = @_;
2128 return unless $c->debug;
2130 my $column_width = Catalyst::Utils::term_width() - 44;
2131 foreach my $type (qw(query body)) {
2132 my $params = $all_params{$type};
2133 next if ! keys %$params;
2134 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2135 for my $key ( sort keys %$params ) {
2136 my $param = $params->{$key};
2137 my $value = defined($param) ? $param : '';
2138 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2140 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2144 =head2 $c->log_request_uploads
2146 Logs file uploads included in the request to the debug logs.
2147 The parameter name, filename, file type, and file size are all included in
2152 sub log_request_uploads {
2154 my $request = shift;
2155 return unless $c->debug;
2156 my $uploads = $request->uploads;
2157 if ( keys %$uploads ) {
2158 my $t = Text::SimpleTable->new(
2159 [ 12, 'Parameter' ],
2164 for my $key ( sort keys %$uploads ) {
2165 my $upload = $uploads->{$key};
2166 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2167 $t->row( $key, $u->filename, $u->type, $u->size );
2170 $c->log->debug( "File Uploads are:\n" . $t->draw );
2174 =head2 $c->log_request_headers($headers);
2176 Hook method which can be wrapped by plugins to log the request headers.
2177 No-op in the default implementation.
2181 sub log_request_headers {}
2183 =head2 $c->log_headers($type => $headers)
2185 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2192 my $headers = shift; # an HTTP::Headers instance
2194 return unless $c->debug;
2196 my $column_width = Catalyst::Utils::term_width() - 28;
2197 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2200 my ( $name, $value ) = @_;
2201 $t->row( $name, $value );
2204 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2208 =head2 $c->prepare_read
2210 Prepares the input for reading.
2214 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2216 =head2 $c->prepare_request
2218 Prepares the engine request.
2222 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2224 =head2 $c->prepare_uploads
2230 sub prepare_uploads {
2233 $c->engine->prepare_uploads( $c, @_ );
2236 =head2 $c->prepare_write
2238 Prepares the output for writing.
2242 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2244 =head2 $c->request_class
2246 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2248 =head2 $c->response_class
2250 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2252 =head2 $c->read( [$maxlength] )
2254 Reads a chunk of data from the request body. This method is designed to
2255 be used in a while loop, reading C<$maxlength> bytes on every call.
2256 C<$maxlength> defaults to the size of the request if not specified.
2258 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2261 Warning: If you use read(), Catalyst will not process the body,
2262 so you will not be able to access POST parameters or file uploads via
2263 $c->request. You must handle all body parsing yourself.
2267 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2275 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2277 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2279 Sets an action in a given namespace.
2283 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2285 =head2 $c->setup_actions($component)
2287 Sets up actions for a component.
2291 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2293 =head2 $c->setup_config
2300 my %args = %{ $class->config || {} };
2302 my @container_classes = ( "${class}::Container", 'Catalyst::IOC::Container');
2303 unshift @container_classes, delete $args{container_class} if exists $args{container_class};
2305 my $container_class = Class::MOP::load_first_existing_class(@container_classes);
2307 my $container = $container_class->new( %args, name => "$class" );
2308 $class->container($container);
2310 my $config = $container->resolve(service => 'config');
2311 $class->config($config);
2312 $class->finalize_config; # back-compat
2315 =head2 $c->finalize_config
2319 sub finalize_config { }
2321 =head2 $c->setup_components
2323 This method is called internally to set up the application's components.
2325 It finds modules by calling the L<locate_components> method, expands them to
2326 package names with the L<expand_component_module> method, and then installs
2327 each component into the application.
2329 The C<setup_components> config option is passed to both of the above methods.
2331 Installation of each component is performed by the L<setup_component> method,
2336 sub setup_components {
2339 my $config = $class->config->{ setup_components };
2341 my @comps = $class->locate_components($config);
2342 my %comps = map { $_ => 1 } @comps;
2344 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2345 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2346 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2347 ) if $deprecatedcatalyst_component_names;
2349 for my $component ( @comps ) {
2351 # We pass ignore_loaded here so that overlay files for (e.g.)
2352 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2353 # we know M::P::O found a file on disk so this is safe
2355 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2359 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
2361 for my $component (@comps) {
2362 my $instance = $class->components->{ $component } = $class->setup_component($component);
2363 if ( my ($type, $name) = _get_component_type_name($component) ) {
2364 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $instance } ));
2366 my @expanded_components = $instance->can('expand_modules')
2367 ? $instance->expand_modules( $component, $config )
2368 : $class->expand_component_module( $component, $config );
2369 for my $component (@expanded_components) {
2370 next if $comps{$component};
2372 $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components;
2373 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2374 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2375 ) if $deprecatedcatalyst_component_names;
2377 if (my ($type, $name) = _get_component_type_name($component)) {
2378 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
2381 $class->components->{ $component } = $class->setup_component($component);
2385 $containers->{model}->make_single_default;
2386 $containers->{view}->make_single_default;
2389 sub _get_component_type_name {
2390 my $component = shift;
2391 my @parts = split /::/, $component;
2393 while (my $type = shift @parts) {
2394 return ('controller', join '::', @parts)
2395 if $type =~ /^(c|controller)$/i;
2397 return ('model', join '::', @parts)
2398 if $type =~ /^(m|model)$/i;
2400 return ('view', join '::', @parts)
2401 if $type =~ /^(v|view)$/i;
2405 =head2 $c->locate_components( $setup_component_config )
2407 This method is meant to provide a list of component modules that should be
2408 setup for the application. By default, it will use L<Module::Pluggable>.
2410 Specify a C<setup_components> config option to pass additional options directly
2411 to L<Module::Pluggable>. To add additional search paths, specify a key named
2412 C<search_extra> as an array reference. Items in the array beginning with C<::>
2413 will have the application class name prepended to them.
2417 sub locate_components {
2421 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2422 my $extra = delete $config->{ search_extra } || [];
2424 push @paths, @$extra;
2426 my $locator = Module::Pluggable::Object->new(
2427 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2431 # XXX think about ditching this sort entirely
2432 my @comps = sort { length $a <=> length $b } $locator->plugins;
2437 =head2 $c->expand_component_module( $component, $setup_component_config )
2439 Components found by C<locate_components> will be passed to this method, which
2440 is expected to return a list of component (package) names to be set up.
2444 sub expand_component_module {
2445 my ($class, $module) = @_;
2446 return Devel::InnerPackage::list_packages( $module );
2449 =head2 $c->setup_component
2453 sub setup_component {
2454 my( $class, $component ) = @_;
2456 unless ( $component->can( 'COMPONENT' ) ) {
2460 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2461 my $config = $class->config->{ $suffix } || {};
2462 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2463 # methods also pass it. local to avoid pointlessly shitting in config
2464 # for the debug screen, as $component is already the key name.
2465 local $config->{catalyst_component_name} = $component;
2467 my $instance = eval { $component->COMPONENT( $class, $config ); };
2469 if ( my $error = $@ ) {
2471 Catalyst::Exception->throw(
2472 message => qq/Couldn't instantiate component "$component", "$error"/
2475 elsif (!blessed $instance) {
2476 my $metaclass = Moose::Util::find_meta($component);
2477 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2478 my $component_method_from = $method_meta->associated_metaclass->name;
2479 my $value = defined($instance) ? $instance : 'undef';
2480 Catalyst::Exception->throw(
2482 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2489 =head2 $c->setup_dispatcher
2495 sub setup_dispatcher {
2496 my ( $class, $dispatcher ) = @_;
2499 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2502 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2503 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2506 unless ($dispatcher) {
2507 $dispatcher = $class->dispatcher_class;
2510 Class::MOP::load_class($dispatcher);
2512 # dispatcher instance
2513 $class->dispatcher( $dispatcher->new );
2516 =head2 $c->setup_engine
2523 my ( $class, $engine ) = @_;
2526 $engine = 'Catalyst::Engine::' . $engine;
2529 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2530 $engine = 'Catalyst::Engine::' . $env;
2533 if ( $ENV{MOD_PERL} ) {
2534 my $meta = Class::MOP::get_metaclass_by_name($class);
2536 # create the apache method
2537 $meta->add_method('apache' => sub { shift->engine->apache });
2539 my ( $software, $version ) =
2540 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2543 $version =~ s/(\.[^.]+)\./$1/g;
2545 if ( $software eq 'mod_perl' ) {
2549 if ( $version >= 1.99922 ) {
2550 $engine = 'Catalyst::Engine::Apache2::MP20';
2553 elsif ( $version >= 1.9901 ) {
2554 $engine = 'Catalyst::Engine::Apache2::MP19';
2557 elsif ( $version >= 1.24 ) {
2558 $engine = 'Catalyst::Engine::Apache::MP13';
2562 Catalyst::Exception->throw( message =>
2563 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2568 # install the correct mod_perl handler
2569 if ( $version >= 1.9901 ) {
2570 *handler = sub : method {
2571 shift->handle_request(@_);
2575 *handler = sub ($$) { shift->handle_request(@_) };
2580 elsif ( $software eq 'Zeus-Perl' ) {
2581 $engine = 'Catalyst::Engine::Zeus';
2585 Catalyst::Exception->throw(
2586 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2591 $engine = $class->engine_class;
2594 Class::MOP::load_class($engine);
2596 # check for old engines that are no longer compatible
2598 if ( $engine->isa('Catalyst::Engine::Apache')
2599 && !Catalyst::Engine::Apache->VERSION )
2604 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2605 && Catalyst::Engine::Server->VERSION le '0.02' )
2610 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2611 && $engine->VERSION eq '0.01' )
2616 elsif ($engine->isa('Catalyst::Engine::Zeus')
2617 && $engine->VERSION eq '0.01' )
2623 Catalyst::Exception->throw( message =>
2624 qq/Engine "$engine" is not supported by this version of Catalyst/
2629 $class->engine( $engine->new );
2632 =head2 $c->setup_home
2634 Sets up the home directory.
2639 my ( $class, $home ) = @_;
2641 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2645 $home ||= Catalyst::Utils::home($class);
2648 #I remember recently being scolded for assigning config values like this
2649 $class->config->{home} ||= $home;
2650 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2654 =head2 $c->setup_log
2656 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2657 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2660 This method also installs a C<debug> method that returns a true value into the
2661 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2662 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2664 Note that if the log has already been setup, by either a previous call to
2665 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2666 that this method won't actually set up the log object.
2671 my ( $class, $levels ) = @_;
2674 $levels =~ s/^\s+//;
2675 $levels =~ s/\s+$//;
2676 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2678 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2679 if ( defined $env_debug ) {
2680 $levels{debug} = 1 if $env_debug; # Ugly!
2681 delete($levels{debug}) unless $env_debug;
2684 unless ( $class->log ) {
2685 $class->log( Catalyst::Log->new(keys %levels) );
2688 if ( $levels{debug} ) {
2689 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2690 $class->log->debug('Debug messages enabled');
2694 =head2 $c->setup_plugins
2700 =head2 $c->setup_stats
2702 Sets up timing statistics class.
2707 my ( $class, $stats ) = @_;
2709 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2711 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2712 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2713 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2714 $class->log->debug('Statistics enabled');
2719 =head2 $c->registered_plugins
2721 Returns a sorted list of the plugins which have either been stated in the
2722 import list or which have been added via C<< MyApp->plugin(@args); >>.
2724 If passed a given plugin name, it will report a boolean value indicating
2725 whether or not that plugin is loaded. A fully qualified name is required if
2726 the plugin name does not begin with C<Catalyst::Plugin::>.
2728 if ($c->registered_plugins('Some::Plugin')) {
2736 sub registered_plugins {
2738 return sort keys %{ $proto->_plugins } unless @_;
2740 return 1 if exists $proto->_plugins->{$plugin};
2741 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2744 sub _register_plugin {
2745 my ( $proto, $plugin, $instant ) = @_;
2746 my $class = ref $proto || $proto;
2748 Class::MOP::load_class( $plugin );
2749 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2750 if $plugin->isa( 'Catalyst::Component' );
2751 $proto->_plugins->{$plugin} = 1;
2753 my $meta = Class::MOP::get_metaclass_by_name($class);
2754 $meta->superclasses($plugin, $meta->superclasses);
2760 my ( $class, $plugins ) = @_;
2762 $class->_plugins( {} ) unless $class->_plugins;
2763 $plugins = Data::OptList::mkopt($plugins || []);
2766 [ Catalyst::Utils::resolve_namespace(
2767 $class . '::Plugin',
2768 'Catalyst::Plugin', $_->[0]
2774 for my $plugin ( reverse @plugins ) {
2775 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2776 my $meta = find_meta($plugin->[0]);
2777 next if $meta && $meta->isa('Moose::Meta::Role');
2779 $class->_register_plugin($plugin->[0]);
2783 map { $_->[0]->name, $_->[1] }
2784 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2785 map { [find_meta($_->[0]), $_->[1]] }
2788 Moose::Util::apply_all_roles(
2796 Returns an arrayref of the internal execution stack (actions that are
2797 currently executing).
2801 Returns the current timing statistics object. By default Catalyst uses
2802 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2803 L<< stats_class|/"$c->stats_class" >>.
2805 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2806 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2807 profile explicitly, although MyApp.pm still won't profile nor output anything
2810 =head2 $c->stats_class
2812 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2814 =head2 $c->use_stats
2816 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2818 Note that this is a static method, not an accessor and should be overridden
2819 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2826 =head2 $c->write( $data )
2828 Writes $data to the output stream. When using this method directly, you
2829 will need to manually set the C<Content-Length> header to the length of
2830 your output data, if known.
2837 # Finalize headers if someone manually writes output
2838 $c->finalize_headers;
2840 return $c->engine->write( $c, @_ );
2845 Returns the Catalyst version number. Mostly useful for "powered by"
2846 messages in template systems.
2850 sub version { return $Catalyst::VERSION }
2852 =head1 CONFIGURATION
2854 There are a number of 'base' config variables which can be set:
2860 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2864 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
2868 C<home> - The application home directory. In an uninstalled application,
2869 this is the top level application directory. In an installed application,
2870 this will be the directory containing C<< MyApp.pm >>.
2874 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
2878 C<name> - The name of the application in debug messages and the debug and
2883 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
2884 until it is accessed. This allows you to (for example) check authentication (and reject
2885 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
2889 C<root> - The root directory for templates. Usually this is just a
2890 subdirectory of the home directory, but you can set it to change the
2891 templates to a different directory.
2895 C<search_extra> - Array reference passed to Module::Pluggable to for additional
2896 namespaces from which components will be loaded (and constructed and stored in
2897 C<< $c->components >>).
2901 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
2902 to be shown in hit debug tables in the test server.
2906 C<use_request_uri_for_path> - Controlls if the C<REQUEST_URI> or C<PATH_INFO> environment
2907 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
2908 for more information.
2912 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
2916 =head1 INTERNAL ACTIONS
2918 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2919 C<_ACTION>, and C<_END>. These are by default not shown in the private
2920 action table, but you can make them visible with a config parameter.
2922 MyApp->config(show_internal_actions => 1);
2924 =head1 ON-DEMAND PARSER
2926 The request body is usually parsed at the beginning of a request,
2927 but if you want to handle input yourself, you can enable on-demand
2928 parsing with a config parameter.
2930 MyApp->config(parse_on_demand => 1);
2932 =head1 PROXY SUPPORT
2934 Many production servers operate using the common double-server approach,
2935 with a lightweight frontend web server passing requests to a larger
2936 backend server. An application running on the backend server must deal
2937 with two problems: the remote user always appears to be C<127.0.0.1> and
2938 the server's hostname will appear to be C<localhost> regardless of the
2939 virtual host that the user connected through.
2941 Catalyst will automatically detect this situation when you are running
2942 the frontend and backend servers on the same machine. The following
2943 changes are made to the request.
2945 $c->req->address is set to the user's real IP address, as read from
2946 the HTTP X-Forwarded-For header.
2948 The host value for $c->req->base and $c->req->uri is set to the real
2949 host, as read from the HTTP X-Forwarded-Host header.
2951 Additionally, you may be running your backend application on an insecure
2952 connection (port 80) while your frontend proxy is running under SSL. If there
2953 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
2954 tell Catalyst what port the frontend listens on. This will allow all URIs to
2955 be created properly.
2957 In the case of passing in:
2959 X-Forwarded-Port: 443
2961 All calls to C<uri_for> will result in an https link, as is expected.
2963 Obviously, your web server must support these headers for this to work.
2965 In a more complex server farm environment where you may have your
2966 frontend proxy server(s) on different machines, you will need to set a
2967 configuration option to tell Catalyst to read the proxied data from the
2970 MyApp->config(using_frontend_proxy => 1);
2972 If you do not wish to use the proxy support at all, you may set:
2974 MyApp->config(ignore_frontend_proxy => 1);
2976 =head1 THREAD SAFETY
2978 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2979 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2980 believe the Catalyst core to be thread-safe.
2982 If you plan to operate in a threaded environment, remember that all other
2983 modules you are using must also be thread-safe. Some modules, most notably
2984 L<DBD::SQLite>, are not thread-safe.
2990 Join #catalyst on irc.perl.org.
2994 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
2995 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
2999 http://catalyst.perl.org
3003 http://dev.catalyst.perl.org
3007 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3009 =head2 L<Catalyst::Manual> - The Catalyst Manual
3011 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3013 =head2 L<Catalyst::Engine> - Core engine
3015 =head2 L<Catalyst::Log> - Log class.
3017 =head2 L<Catalyst::Request> - Request object
3019 =head2 L<Catalyst::Response> - Response object
3021 =head2 L<Catalyst::Test> - The test suite.
3023 =head1 PROJECT FOUNDER
3025 sri: Sebastian Riedel <sri@cpan.org>
3031 acme: Leon Brocard <leon@astray.com>
3033 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3037 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3043 andyg: Andy Grundman <andy@hybridized.org>
3045 audreyt: Audrey Tang
3047 bricas: Brian Cassidy <bricas@cpan.org>
3049 Caelum: Rafael Kitover <rkitover@io.com>
3051 chansen: Christian Hansen
3053 chicks: Christopher Hicks
3055 Chisel Wright C<pause@herlpacker.co.uk>
3057 Danijel Milicevic C<me@danijel.de>
3059 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3061 David Naughton, C<naughton@umn.edu>
3065 dhoss: Devin Austin <dhoss@cpan.org>
3067 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3071 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3073 esskar: Sascha Kiefer
3075 fireartist: Carl Franks <cfranks@cpan.org>
3077 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3079 gabb: Danijel Milicevic
3083 Gavin Henry C<ghenry@perl.me.uk>
3087 groditi: Guillermo Roditi <groditi@gmail.com>
3089 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3091 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3093 jcamacho: Juan Camacho
3095 jester: Jesse Sheidlower C<jester@panix.com>
3097 jhannah: Jay Hannah <jay@jays.net>
3103 jon: Jon Schutz <jjschutz@cpan.org>
3105 Jonathan Rockway C<< <jrockway@cpan.org> >>
3107 Kieren Diment C<kd@totaldatasolution.com>
3109 konobi: Scott McWhirter <konobi@cpan.org>
3111 marcus: Marcus Ramberg <mramberg@cpan.org>
3113 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3115 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3119 naughton: David Naughton
3121 ningu: David Kamholz <dkamholz@cpan.org>
3123 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3125 numa: Dan Sully <daniel@cpan.org>
3131 omega: Andreas Marienborg
3133 Oleg Kostyuk <cub.uanic@gmail.com>
3135 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3137 rafl: Florian Ragwitz <rafl@debian.org>
3139 random: Roland Lammel <lammel@cpan.org>
3141 Robert Sedlacek C<< <rs@474.at> >>
3143 SpiceMan: Marcel Montes
3147 szbalint: Balint Szilakszi <szbalint@cpan.org>
3149 t0m: Tomas Doran <bobtfish@bobtfish.net>
3153 Viljo Marrandi C<vilts@yahoo.com>
3155 Will Hawes C<info@whawes.co.uk>
3157 willert: Sebastian Willert <willert@cpan.org>
3159 wreis: Wallace Reis <wallace@reis.org.br>
3161 Yuval Kogman, C<nothingmuch@woobling.org>
3163 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3165 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3169 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3173 This library is free software. You can redistribute it and/or modify it under
3174 the same terms as Perl itself.
3180 __PACKAGE__->meta->make_immutable;