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 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);
96 unless ( $caller->isa('Catalyst') ) { # XXX - Remove!
97 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Component'); # XXX - Remove!
98 $meta->superclasses(@superclasses); # XXX - Remove!
101 # Avoid possible C3 issues if 'Moose::Object' is already on RHS of MyApp
102 $meta->superclasses(grep { $_ ne 'Moose::Object' } $meta->superclasses);
104 unless( $meta->has_method('meta') ){
105 if ($Moose::VERSION >= 1.15) {
106 $meta->_add_meta_method('meta');
109 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
113 $caller->arguments( [@arguments] );
117 sub MODIFY_CODE_ATTRIBUTES {
118 Catalyst::Exception->throw(
119 "Catalyst applications (aka MyApp) cannot be controllers anymore. " .
120 "That has been deprecated and removed. You should create a " .
121 "controller class called Root.pm, and move relevant code to that class."
126 sub _application { $_[0] }
130 Catalyst - The Elegant MVC Web Application Framework
134 See the L<Catalyst::Manual> distribution for comprehensive
135 documentation and tutorials.
137 # Install Catalyst::Devel for helpers and other development tools
138 # use the helper to create a new application
141 # add models, views, controllers
142 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
143 script/myapp_create.pl view MyTemplate TT
144 script/myapp_create.pl controller Search
146 # built in testserver -- use -r to restart automatically on changes
147 # --help to see all available options
148 script/myapp_server.pl
150 # command line testing interface
151 script/myapp_test.pl /yada
154 use Catalyst qw/-Debug/; # include plugins here as well
156 ### In lib/MyApp/Controller/Root.pm (autocreated)
157 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
158 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
159 $c->stash->{template} = 'foo.tt'; # set the template
160 # lookup something from db -- stash vars are passed to TT
162 $c->model('Database::Foo')->search( { country => $args[0] } );
163 if ( $c->req->params->{bar} ) { # access GET or POST parameters
164 $c->forward( 'bar' ); # process another action
165 # do something else after forward returns
169 # The foo.tt TT template can use the stash data from the database
170 [% WHILE (item = data.next) %]
174 # called for /bar/of/soap, /bar/of/soap/10, etc.
175 sub bar : Path('/bar/of/soap') { ... }
177 # called for all actions, from the top-most controller downwards
179 my ( $self, $c ) = @_;
180 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
181 $c->res->redirect( '/login' ); # require login
182 return 0; # abort request and go immediately to end()
184 return 1; # success; carry on to next action
187 # called after all actions are finished
189 my ( $self, $c ) = @_;
190 if ( scalar @{ $c->error } ) { ... } # handle errors
191 return if $c->res->body; # already have a response
192 $c->forward( 'MyApp::View::TT' ); # render template
195 ### in MyApp/Controller/Foo.pm
196 # called for /foo/bar
197 sub bar : Local { ... }
199 # called for /blargle
200 sub blargle : Global { ... }
202 # an index action matches /foo, but not /foo/1, etc.
203 sub index : Private { ... }
205 ### in MyApp/Controller/Foo/Bar.pm
206 # called for /foo/bar/baz
207 sub baz : Local { ... }
209 # first Root auto is called, then Foo auto, then this
210 sub auto : Private { ... }
212 # powerful regular expression paths are also possible
213 sub details : Regex('^product/(\w+)/details$') {
214 my ( $self, $c ) = @_;
215 # extract the (\w+) from the URI
216 my $product = $c->req->captures->[0];
219 See L<Catalyst::Manual::Intro> for additional information.
223 Catalyst is a modern framework for making web applications without the
224 pain usually associated with this process. This document is a reference
225 to the main Catalyst application. If you are a new user, we suggest you
226 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
228 See L<Catalyst::Manual> for more documentation.
230 Catalyst plugins can be loaded by naming them as arguments to the "use
231 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
232 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
235 use Catalyst qw/My::Module/;
237 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
238 fully qualify the name by using a unary plus:
242 +Fully::Qualified::Plugin::Name
245 Special flags like C<-Debug> and C<-Engine> can also be specified as
246 arguments when Catalyst is loaded:
248 use Catalyst qw/-Debug My::Module/;
250 The position of plugins and flags in the chain is important, because
251 they are loaded in the order in which they appear.
253 The following flags are supported:
257 Enables debug output. You can also force this setting from the system
258 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
259 settings override the application, with <MYAPP>_DEBUG having the highest
262 This sets the log level to 'debug' and enables full debug output on the
263 error screen. If you only want the latter, see L<< $c->debug >>.
267 Forces Catalyst to use a specific engine. Omit the
268 C<Catalyst::Engine::> prefix of the engine name, i.e.:
270 use Catalyst qw/-Engine=CGI/;
274 Forces Catalyst to use a specific home directory, e.g.:
276 use Catalyst qw[-Home=/usr/mst];
278 This can also be done in the shell environment by setting either the
279 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
280 is replaced with the uppercased name of your application, any "::" in
281 the name will be replaced with underscores, e.g. MyApp::Web should use
282 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
284 If none of these are set, Catalyst will attempt to automatically detect the
285 home directory. If you are working in a development envirnoment, Catalyst
286 will try and find the directory containing either Makefile.PL, Build.PL or
287 dist.ini. If the application has been installed into the system (i.e.
288 you have done C<make install>), then Catalyst will use the path to your
289 application module, without the .pm extension (ie, /foo/MyApp if your
290 application was installed at /foo/MyApp.pm)
294 use Catalyst '-Log=warn,fatal,error';
296 Specifies a comma-delimited list of log levels.
300 Enables statistics collection and reporting.
302 use Catalyst qw/-Stats=1/;
304 You can also force this setting from the system environment with CATALYST_STATS
305 or <MYAPP>_STATS. The environment settings override the application, with
306 <MYAPP>_STATS having the highest priority.
308 Stats are also enabled if L<< debugging |/"-Debug" >> is enabled.
312 =head2 INFORMATION ABOUT THE CURRENT REQUEST
316 Returns a L<Catalyst::Action> object for the current action, which
317 stringifies to the action name. See L<Catalyst::Action>.
321 Returns the namespace of the current action, i.e., the URI prefix
322 corresponding to the controller of the current action. For example:
324 # in Controller::Foo::Bar
325 $c->namespace; # returns 'foo/bar';
331 Returns the current L<Catalyst::Request> object, giving access to
332 information about the current client request (including parameters,
333 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
335 =head2 REQUEST FLOW HANDLING
337 =head2 $c->forward( $action [, \@arguments ] )
339 =head2 $c->forward( $class, $method, [, \@arguments ] )
341 Forwards processing to another action, by its private name. If you give a
342 class name but no method, C<process()> is called. You may also optionally
343 pass arguments in an arrayref. The action will receive the arguments in
344 C<@_> and C<< $c->req->args >>. Upon returning from the function,
345 C<< $c->req->args >> will be restored to the previous values.
347 Any data C<return>ed from the action forwarded to, will be returned by the
350 my $foodata = $c->forward('/foo');
351 $c->forward('index');
352 $c->forward(qw/Model::DBIC::Foo do_stuff/);
353 $c->forward('View::TT');
355 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
356 an C<< eval { } >> around the call (actually
357 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus de-fatalizing
358 all 'dies' within the called action. If you want C<die> to propagate you
359 need to do something like:
362 die join "\n", @{ $c->error } if @{ $c->error };
364 Or make sure to always return true values from your actions and write
367 $c->forward('foo') || return;
369 Another note is that C<< $c->forward >> always returns a scalar because it
370 actually returns $c->state which operates in a scalar context.
371 Thus, something like:
375 in an action that is forwarded to is going to return a scalar,
376 i.e. how many items are in that array, which is probably not what you want.
377 If you need to return an array then return a reference to it,
380 $c->stash->{array} = \@array;
382 and access it from the stash.
384 Keep in mind that the C<end> method used is that of the caller action. So a C<$c-E<gt>detach> inside a forwarded action would run the C<end> method from the original action requested.
388 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
390 =head2 $c->detach( $action [, \@arguments ] )
392 =head2 $c->detach( $class, $method, [, \@arguments ] )
396 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
397 doesn't return to the previous action when processing is finished.
399 When called with no arguments it escapes the processing chain entirely.
403 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
405 =head2 $c->visit( $action [, \@captures, \@arguments ] )
407 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
409 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
410 but does a full dispatch, instead of just calling the new C<$action> /
411 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
412 you go to are called, just like a new request.
414 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
415 This means, for example, that C<< $c->action >> methods such as
416 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
417 L<reverse|Catalyst::Action/reverse> return information for the visited action
418 when they are invoked within the visited action. This is different from the
419 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
420 continues to use the $c->action object from the caller action even when
421 invoked from the callee.
423 C<< $c->stash >> is kept unchanged.
425 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
426 allows you to "wrap" another action, just as it would have been called by
427 dispatching from a URL, while the analogous
428 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
429 transfer control to another action as if it had been reached directly from a URL.
433 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
435 =head2 $c->go( $action [, \@captures, \@arguments ] )
437 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
439 The relationship between C<go> and
440 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
441 the relationship between
442 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
443 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
444 C<< $c->go >> will perform a full dispatch on the specified action or method,
445 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
446 C<go> escapes the processing of the current request chain on completion, and
447 does not return to its caller.
449 @arguments are arguments to the final destination of $action. @captures are
450 arguments to the intermediate steps, if any, on the way to the final sub of
455 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
461 Returns the current L<Catalyst::Response> object, see there for details.
465 Returns a hashref to the stash, which may be used to store data and pass
466 it between components during a request. You can also set hash keys by
467 passing arguments. The stash is automatically sent to the view. The
468 stash is cleared at the end of a request; it cannot be used for
469 persistent storage (for this you must use a session; see
470 L<Catalyst::Plugin::Session> for a complete system integrated with
473 $c->stash->{foo} = $bar;
474 $c->stash( { moose => 'majestic', qux => 0 } );
475 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
477 # stash is automatically passed to the view for use in a template
478 $c->forward( 'MyApp::View::TT' );
482 around stash => sub {
485 my $stash = $orig->($c);
487 my $new_stash = @_ > 1 ? {@_} : $_[0];
488 croak('stash takes a hash or hashref') unless ref $new_stash;
489 foreach my $key ( keys %$new_stash ) {
490 $stash->{$key} = $new_stash->{$key};
500 =head2 $c->error($error, ...)
502 =head2 $c->error($arrayref)
504 Returns an arrayref containing error messages. If Catalyst encounters an
505 error while processing a request, it stores the error in $c->error. This
506 method should only be used to store fatal error messages.
508 my @error = @{ $c->error };
512 $c->error('Something bad happened');
519 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
520 croak @$error unless ref $c;
521 push @{ $c->{error} }, @$error;
523 elsif ( defined $_[0] ) { $c->{error} = undef }
524 return $c->{error} || [];
530 Contains the return value of the last executed action.
531 Note that << $c->state >> operates in a scalar context which means that all
532 values it returns are scalar.
534 =head2 $c->clear_errors
536 Clear errors. You probably don't want to clear the errors unless you are
537 implementing a custom error screen.
539 This is equivalent to running
550 =head2 COMPONENT ACCESSORS
552 =head2 $c->controller($name)
554 Gets a L<Catalyst::Controller> instance by name.
556 $c->controller('Foo')->do_stuff;
558 If the name is omitted, will return the controller for the dispatched
561 If you want to search for controllers, pass in a regexp as the argument.
563 # find all controllers that start with Foo
564 my @foo_controllers = $c->controller(qr{^Foo});
570 my ( $c, $name, @args ) = @_;
572 $name ||= Catalyst::Utils::class2classshortsuffix( $c->action->class );
574 return $c->container->get_component_from_sub_container( 'controller', $name, $c, @args);
577 =head2 $c->model($name)
579 Gets a L<Catalyst::Model> instance by name.
581 $c->model('Foo')->do_stuff;
583 Any extra arguments are directly passed to ACCEPT_CONTEXT.
585 If the name is omitted, it will look for
586 - a model object in $c->stash->{current_model_instance}, then
587 - a model name in $c->stash->{current_model}, then
588 - a config setting 'default_model', or
589 - check if there is only one model, and return it if that's the case.
591 If you want to search for models, pass in a regexp as the argument.
593 # find all models that start with Foo
594 my @foo_models = $c->model(qr{^Foo});
599 my ( $c, $name, @args ) = @_;
601 if (ref $c && !$name) {
602 return $c->stash->{current_model_instance}
603 if $c->stash->{current_model_instance};
605 $name = $c->stash->{current_model}
606 if $c->stash->{current_model};
609 return $c->container->get_component_from_sub_container( 'model', $name, $c, @args);
613 =head2 $c->view($name)
615 Gets a L<Catalyst::View> instance by name.
617 $c->view('Foo')->do_stuff;
619 Any extra arguments are directly passed to ACCEPT_CONTEXT.
621 If the name is omitted, it will look for
622 - a view object in $c->stash->{current_view_instance}, then
623 - a view name in $c->stash->{current_view}, then
624 - a config setting 'default_view', or
625 - check if there is only one view, and return it if that's the case.
627 If you want to search for views, pass in a regexp as the argument.
629 # find all views that start with Foo
630 my @foo_views = $c->view(qr{^Foo});
635 my ( $c, $name, @args ) = @_;
637 if (ref $c && !$name) {
638 return $c->stash->{current_view_instance}
639 if $c->stash->{current_view_instance};
641 $name = $c->stash->{current_view}
642 if $c->stash->{current_view};
645 return $c->container->get_component_from_sub_container( 'view', $name, $c, @args);
648 =head2 $c->controllers
650 Returns the available names which can be passed to $c->controller
656 return $c->container->get_sub_container('controller')->get_service_list;
661 Returns the available names which can be passed to $c->model
667 return $c->container->get_sub_container('model')->get_service_list;
673 Returns the available names which can be passed to $c->view
679 return $c->container->get_sub_container('view')->get_service_list;
682 =head2 $c->comp($name)
684 =head2 $c->component($name)
686 Gets a component object by name. This method is not recommended,
687 unless you want to get a specific component by full
688 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
689 should be used instead.
691 If C<$name> is a regexp, a list of components matched against the full
692 component name will be returned.
697 my ( $c, $component, @args ) = @_;
699 unless ($component) {
700 $c->log->warn('Calling $c->component with no args is deprecated and ');
701 $c->log->warn('will be removed in a future release.');
702 $c->log->warn('Use $c->component_list instead.');
703 return $c->component_list;
706 my @result = $c->container->find_component( $component, $c, @args );
708 # list context for regexp searches
709 return @result if ref $component;
711 # only one component (if it's found) for string searches
712 return shift @result if @result;
714 if (ref $c eq $component) {
715 $c->log->warn('You are calling $c->comp("MyApp"). This behaviour is');
716 $c->log->warn('deprecated, and will be removed in a future release.');
720 $c->log->warn("Looking for '$component', but nothing was found.");
722 # I would expect to return an empty list here, but that breaks back-compat
723 $c->log->warn('Component not found, returning the list of existing');
724 $c->log->warn('components. This behavior is deprecated and will be');
725 $c->log->warn('removed in a future release. Use $c->component_list');
726 $c->log->warn('instead.');
728 return $c->component_list;
731 =head2 $c->component_list
733 Returns the sorted list of the component names of the application.
737 sub component_list { sort keys %{ shift->components } }
739 =head2 CLASS DATA AND HELPER CLASSES
743 Returns or takes a hashref containing the application's configuration.
745 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
747 You can also use a C<YAML>, C<XML> or L<Config::General> config file
748 like C<myapp.conf> in your applications home directory. See
749 L<Catalyst::Plugin::ConfigLoader>.
751 =head3 Cascading configuration
753 The config method is present on all Catalyst components, and configuration
754 will be merged when an application is started. Configuration loaded with
755 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
756 followed by configuration in your top level C<MyApp> class. These two
757 configurations are merged, and then configuration data whose hash key matches a
758 component name is merged with configuration for that component.
760 The configuration for a component is then passed to the C<new> method when a
761 component is constructed.
765 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
766 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
768 will mean that C<MyApp::Model::Foo> receives the following data when
771 MyApp::Model::Foo->new({
777 It's common practice to use a Moose attribute
778 on the receiving component to access the config value.
780 package MyApp::Model::Foo;
784 # this attr will receive 'baz' at construction time
790 You can then get the value 'baz' by calling $c->model('Foo')->bar
791 (or $self->bar inside code in the model).
793 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
794 as a way of reading config within your code, as this B<will not> give you the
795 correctly merged config back. You B<MUST> take the config values supplied to
796 the constructor and use those instead.
800 around config => sub {
804 croak('Setting config after setup has been run is not allowed.')
805 if ( @_ and $c->setup_finished );
812 Returns the logging object instance. Unless it is already set, Catalyst
813 sets this up with a L<Catalyst::Log> object. To use your own log class,
814 set the logger with the C<< __PACKAGE__->log >> method prior to calling
815 C<< __PACKAGE__->setup >>.
817 __PACKAGE__->log( MyLogger->new );
822 $c->log->info( 'Now logging with my own logger!' );
824 Your log class should implement the methods described in
830 Returns 1 if debug mode is enabled, 0 otherwise.
832 You can enable debug mode in several ways:
836 =item By calling myapp_server.pl with the -d flag
838 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
840 =item The -Debug option in your MyApp.pm
842 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
846 The first three also set the log level to 'debug'.
848 Calling C<< $c->debug(1) >> has no effect.
854 =head2 $c->dispatcher
856 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
860 Returns the engine instance. See L<Catalyst::Engine>.
863 =head2 UTILITY METHODS
865 =head2 $c->path_to(@path)
867 Merges C<@path> with C<< $c->config->{home} >> and returns a
868 L<Path::Class::Dir> object. Note you can usually use this object as
869 a filename, but sometimes you will have to explicitly stringify it
870 yourself by calling the C<< ->stringify >> method.
874 $c->path_to( 'db', 'sqlite.db' );
879 my ( $c, @path ) = @_;
880 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
881 if ( -d $path ) { return $path }
882 else { return Path::Class::File->new( $c->config->{home}, @path ) }
885 =head2 $c->plugin( $name, $class, @args )
887 Helper method for plugins. It creates a class data accessor/mutator and
888 loads and instantiates the given class.
890 MyApp->plugin( 'prototype', 'HTML::Prototype' );
892 $c->prototype->define_javascript_functions;
894 B<Note:> This method of adding plugins is deprecated. The ability
895 to add plugins like this B<will be removed> in a Catalyst 5.81.
896 Please do not use this functionality in new code.
901 my ( $class, $name, $plugin, @args ) = @_;
903 # See block comment in t/aggregate/unit_core_plugin.t
904 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
906 $class->_register_plugin( $plugin, 1 );
908 eval { $plugin->import };
909 $class->mk_classdata($name);
911 eval { $obj = $plugin->new(@args) };
914 Catalyst::Exception->throw( message =>
915 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
919 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
925 Initializes the dispatcher and engine, loads any plugins, and loads the
926 model, view, and controller components. You may also specify an array
927 of plugins to load here, if you choose to not load them in the C<use
931 MyApp->setup( qw/-Debug/ );
936 my ( $class, @arguments ) = @_;
937 croak('Running setup more than once')
938 if ( $class->setup_finished );
940 unless ( $class->isa('Catalyst') ) {
942 Catalyst::Exception->throw(
943 message => qq/'$class' does not inherit from Catalyst/ );
946 if ( $class->arguments ) {
947 @arguments = ( @arguments, @{ $class->arguments } );
953 foreach (@arguments) {
957 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
959 elsif (/^-(\w+)=?(.*)$/) {
960 $flags->{ lc $1 } = $2;
963 push @{ $flags->{plugins} }, $_;
967 $class->setup_config();
968 $class->setup_home( delete $flags->{home} );
970 $class->setup_log( delete $flags->{log} );
971 $class->setup_plugins( delete $flags->{plugins} );
972 $class->setup_dispatcher( delete $flags->{dispatcher} );
973 $class->setup_engine( delete $flags->{engine} );
974 $class->setup_stats( delete $flags->{stats} );
976 for my $flag ( sort keys %{$flags} ) {
978 if ( my $code = $class->can( 'setup_' . $flag ) ) {
979 &$code( $class, delete $flags->{$flag} );
982 $class->log->warn(qq/Unknown flag "$flag"/);
986 eval { require Catalyst::Devel; };
987 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
988 $class->log->warn(<<"EOF");
989 You are running an old script!
991 Please update by running (this will overwrite existing files):
992 catalyst.pl -force -scripts $class
994 or (this will not overwrite existing files):
995 catalyst.pl -scripts $class
1000 if ( $class->debug ) {
1001 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1004 my $column_width = Catalyst::Utils::term_width() - 6;
1005 my $t = Text::SimpleTable->new($column_width);
1006 $t->row($_) for @plugins;
1007 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1010 my $dispatcher = $class->dispatcher;
1011 my $engine = $class->engine;
1012 my $home = $class->config->{home};
1014 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1015 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1019 ? $class->log->debug(qq/Found home "$home"/)
1020 : $class->log->debug(qq/Home "$home" doesn't exist/)
1021 : $class->log->debug(q/Couldn't find home/);
1024 # Call plugins setup, this is stupid and evil.
1025 # Also screws C3 badly on 5.10, hack to avoid.
1027 no warnings qw/redefine/;
1028 local *setup = sub { };
1029 $class->setup unless $Catalyst::__AM_RESTARTING;
1032 $class->setup_components;
1036 my @comps_types = $class->container->get_components_types
1038 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1039 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1040 $t->row( @$_ ) for @comps_types;
1042 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" );
1045 $class->setup_actions;
1047 if ( $class->debug ) {
1048 my $name = $class->config->{name} || 'Application';
1049 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1052 # Make sure that the application class becomes immutable at this point,
1053 B::Hooks::EndOfScope::on_scope_end {
1055 my $meta = Class::MOP::get_metaclass_by_name($class);
1058 && ! { $meta->immutable_options }->{replace_constructor}
1060 $class->isa('Class::Accessor::Fast')
1061 || $class->isa('Class::Accessor')
1064 warn "You made your application class ($class) immutable, "
1065 . "but did not inline the\nconstructor. "
1066 . "This will break catalyst, as your app \@ISA "
1067 . "Class::Accessor(::Fast)?\nPlease pass "
1068 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1070 $meta->make_immutable(
1071 replace_constructor => 1,
1072 ) unless $meta->is_immutable;
1075 if ($class->config->{case_sensitive}) {
1076 $class->log->warn($class . "->config->{case_sensitive} is set.");
1077 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1080 $class->setup_finalize;
1081 # Should be the last thing we do so that user things hooking
1082 # setup_finalize can log..
1083 $class->log->_flush() if $class->log->can('_flush');
1084 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1087 =head2 $app->setup_finalize
1089 A hook to attach modifiers to. This method does not do anything except set the
1090 C<setup_finished> accessor.
1092 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1096 after setup_finalize => sub {
1104 sub setup_finalize {
1106 $class->setup_finished(1);
1109 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1111 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1113 Constructs an absolute L<URI> object based on the application root, the
1114 provided path, and the additional arguments and query parameters provided.
1115 When used as a string, provides a textual URI. If you need more flexibility
1116 than this (i.e. the option to provide relative URIs etc.) see
1117 L<Catalyst::Plugin::SmartURI>.
1119 If no arguments are provided, the URI for the current action is returned.
1120 To return the current action and also provide @args, use
1121 C<< $c->uri_for( $c->action, @args ) >>.
1123 If the first argument is a string, it is taken as a public URI path relative
1124 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1125 relative to the application root (if it does). It is then merged with
1126 C<< $c->request->base >>; any C<@args> are appended as additional path
1127 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1129 If the first argument is a L<Catalyst::Action> it represents an action which
1130 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1131 optional C<\@captures> argument (an arrayref) allows passing the captured
1132 variables that are needed to fill in the paths of Chained and Regex actions;
1133 once the path is resolved, C<uri_for> continues as though a path was
1134 provided, appending any arguments or parameters and creating an absolute
1137 The captures for the current request can be found in
1138 C<< $c->request->captures >>, and actions can be resolved using
1139 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1140 path, use C<< $c->uri_for_action >> instead.
1142 # Equivalent to $c->req->uri
1143 $c->uri_for($c->action, $c->req->captures,
1144 @{ $c->req->args }, $c->req->params);
1146 # For the Foo action in the Bar controller
1147 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1149 # Path to a static resource
1150 $c->uri_for('/static/images/logo.png');
1155 my ( $c, $path, @args ) = @_;
1157 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1158 $path = $path->path_prefix;
1163 undef($path) if (defined $path && $path eq '');
1166 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1168 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1169 foreach my $arg (@args) {
1170 utf8::encode($arg) if utf8::is_utf8($arg);
1171 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1174 if ( blessed($path) ) { # action object
1175 s|/|%2F|g for @args;
1176 my $captures = [ map { s|/|%2F|g; $_; }
1177 ( scalar @args && ref $args[0] eq 'ARRAY'
1181 foreach my $capture (@$captures) {
1182 utf8::encode($capture) if utf8::is_utf8($capture);
1183 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1187 $path = $c->dispatcher->uri_for_action($action, $captures);
1188 if (not defined $path) {
1189 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1193 $path = '/' if $path eq '';
1196 unshift(@args, $path);
1198 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1199 my $namespace = $c->namespace;
1200 if (defined $path) { # cheesy hack to handle path '../foo'
1201 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1203 unshift(@args, $namespace || '');
1206 # join args with '/', or a blank string
1207 my $args = join('/', grep { defined($_) } @args);
1208 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1210 my $base = $c->req->base;
1211 my $class = ref($base);
1212 $base =~ s{(?<!/)$}{/};
1216 if (my @keys = keys %$params) {
1217 # somewhat lifted from URI::_query's query_form
1218 $query = '?'.join('&', map {
1219 my $val = $params->{$_};
1220 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1223 $val = '' unless defined $val;
1226 utf8::encode( $param ) if utf8::is_utf8($param);
1227 # using the URI::Escape pattern here so utf8 chars survive
1228 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1230 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1234 my $res = bless(\"${base}${args}${query}", $class);
1238 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1240 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1246 A private path to the Catalyst action you want to create a URI for.
1248 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1249 >> and passing the resulting C<$action> and the remaining arguments to C<<
1252 You can also pass in a Catalyst::Action object, in which case it is passed to
1255 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.
1257 For example, if the action looks like:
1259 package MyApp::Controller::Users;
1261 sub lst : Path('the-list') {}
1265 $c->uri_for_action('/users/lst')
1267 and it will create the URI /users/the-list.
1273 sub uri_for_action {
1274 my ( $c, $path, @args ) = @_;
1275 my $action = blessed($path)
1277 : $c->dispatcher->get_action_by_path($path);
1278 unless (defined $action) {
1279 croak "Can't find action for path '$path'";
1281 return $c->uri_for( $action, @args );
1284 =head2 $c->welcome_message
1286 Returns the Catalyst welcome HTML page.
1290 sub welcome_message {
1292 my $name = $c->config->{name};
1293 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1294 my $prefix = Catalyst::Utils::appprefix( ref $c );
1295 $c->response->content_type('text/html; charset=utf-8');
1297 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1298 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1299 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1301 <meta http-equiv="Content-Language" content="en" />
1302 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1303 <title>$name on Catalyst $VERSION</title>
1304 <style type="text/css">
1307 background-color: #eee;
1314 margin-bottom: 10px;
1316 background-color: #ccc;
1317 border: 1px solid #aaa;
1322 font-family: verdana, tahoma, sans-serif;
1325 font-family: verdana, tahoma, sans-serif;
1328 text-decoration: none;
1330 border-bottom: 1px dotted #bbb;
1332 :link:hover, :visited:hover {
1345 background-color: #fff;
1346 border: 1px solid #aaa;
1350 font-weight: normal;
1372 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1377 <img src="$logo" alt="Catalyst Logo" />
1379 <p>Welcome to the world of Catalyst.
1380 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1381 framework will make web development something you had
1382 never expected it to be: Fun, rewarding, and quick.</p>
1383 <h2>What to do now?</h2>
1384 <p>That really depends on what <b>you</b> want to do.
1385 We do, however, provide you with a few starting points.</p>
1386 <p>If you want to jump right into web development with Catalyst
1387 you might want to start with a tutorial.</p>
1388 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1390 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1392 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1393 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1395 <h2>What to do next?</h2>
1396 <p>Next it's time to write an actual application. Use the
1397 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1398 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1399 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1400 they can save you a lot of work.</p>
1401 <pre><code>script/${prefix}_create.pl --help</code></pre>
1402 <p>Also, be sure to check out the vast and growing
1403 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1404 you are likely to find what you need there.
1408 <p>Catalyst has a very active community. Here are the main places to
1409 get in touch with us.</p>
1412 <a href="http://dev.catalyst.perl.org">Wiki</a>
1415 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1418 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1421 <h2>In conclusion</h2>
1422 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1423 as we enjoyed making it. Please contact us if you have ideas
1424 for improvement or other feedback.</p>
1432 =head1 INTERNAL METHODS
1434 These methods are not meant to be used by end users.
1436 =head2 $c->components
1438 Returns a hash of components.
1443 my ( $class, $comps ) = @_;
1445 # FIXME: should this ugly kludge exist?
1446 $class->setup_config unless defined $class->container;
1449 $containers->{$_} = $class->container->get_sub_container($_)
1450 for qw(model view controller);
1453 for my $component ( keys %$comps ) {
1454 my ($type, $name) = _get_component_type_name($component);
1456 $containers->{$type}->add_service(
1457 Catalyst::IOC::BlockInjection->new(
1459 block => sub { $class->setup_component($component) },
1465 return $class->container->get_all_components();
1468 =head2 $c->context_class
1470 Returns or sets the context class.
1474 Returns a hashref containing coderefs and execution counts (needed for
1475 deep recursion detection).
1479 Returns the number of actions on the current internal execution stack.
1483 Dispatches a request to actions.
1487 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1489 =head2 $c->dispatcher_class
1491 Returns or sets the dispatcher class.
1493 =head2 $c->dump_these
1495 Returns a list of 2-element array references (name, structure) pairs
1496 that will be dumped on the error page in debug mode.
1502 [ Request => $c->req ],
1503 [ Response => $c->res ],
1504 [ Stash => $c->stash ],
1505 [ Config => $c->config ];
1508 =head2 $c->engine_class
1510 Returns or sets the engine class.
1512 =head2 $c->execute( $class, $coderef )
1514 Execute a coderef in given class and catch exceptions. Errors are available
1520 my ( $c, $class, $code ) = @_;
1521 $class = $c->component($class) || $class;
1524 if ( $c->depth >= $RECURSION ) {
1525 my $action = $code->reverse();
1526 $action = "/$action" unless $action =~ /->/;
1527 my $error = qq/Deep recursion detected calling "${action}"/;
1528 $c->log->error($error);
1534 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1536 push( @{ $c->stack }, $code );
1538 no warnings 'recursion';
1539 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1540 # I have no idea how, ergo $ret (which appears to fix the issue)
1541 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1543 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1545 my $last = pop( @{ $c->stack } );
1547 if ( my $error = $@ ) {
1548 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1549 $error->rethrow if $c->depth > 1;
1551 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1552 $error->rethrow if $c->depth > 0;
1555 unless ( ref $error ) {
1556 no warnings 'uninitialized';
1558 my $class = $last->class;
1559 my $name = $last->name;
1560 $error = qq/Caught exception in $class->$name "$error"/;
1569 sub _stats_start_execute {
1570 my ( $c, $code ) = @_;
1571 my $appclass = ref($c) || $c;
1572 return if ( ( $code->name =~ /^_.*/ )
1573 && ( !$appclass->config->{show_internal_actions} ) );
1575 my $action_name = $code->reverse();
1576 $c->counter->{$action_name}++;
1578 my $action = $action_name;
1579 $action = "/$action" unless $action =~ /->/;
1581 # determine if the call was the result of a forward
1582 # this is done by walking up the call stack and looking for a calling
1583 # sub of Catalyst::forward before the eval
1585 for my $index ( 2 .. 11 ) {
1587 if ( ( caller($index) )[0] eq 'Catalyst'
1588 && ( caller($index) )[3] eq '(eval)' );
1590 if ( ( caller($index) )[3] =~ /forward$/ ) {
1591 $callsub = ( caller($index) )[3];
1592 $action = "-> $action";
1597 my $uid = $action_name . $c->counter->{$action_name};
1599 # is this a root-level call or a forwarded call?
1600 if ( $callsub =~ /forward$/ ) {
1601 my $parent = $c->stack->[-1];
1603 # forward, locate the caller
1604 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1607 parent => "$parent" . $c->counter->{"$parent"},
1613 # forward with no caller may come from a plugin
1632 sub _stats_finish_execute {
1633 my ( $c, $info ) = @_;
1634 $c->stats->profile( end => $info );
1639 Finalizes the request.
1646 for my $error ( @{ $c->error } ) {
1647 $c->log->error($error);
1650 # Allow engine to handle finalize flow (for POE)
1651 my $engine = $c->engine;
1652 if ( my $code = $engine->can('finalize') ) {
1657 $c->finalize_uploads;
1660 if ( $#{ $c->error } >= 0 ) {
1664 $c->finalize_headers;
1667 if ( $c->request->method eq 'HEAD' ) {
1668 $c->response->body('');
1676 if ($c->use_stats) {
1677 my $elapsed = sprintf '%f', $c->stats->elapsed;
1678 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1680 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1683 return $c->response->status;
1686 =head2 $c->finalize_body
1692 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1694 =head2 $c->finalize_cookies
1700 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1702 =head2 $c->finalize_error
1708 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1710 =head2 $c->finalize_headers
1716 sub finalize_headers {
1719 my $response = $c->response; #accessor calls can add up?
1721 # Check if we already finalized headers
1722 return if $response->finalized_headers;
1725 if ( my $location = $response->redirect ) {
1726 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1727 $response->header( Location => $location );
1729 if ( !$response->has_body ) {
1730 # Add a default body if none is already present
1732 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1738 if ( defined $response->body && length $response->body && !$response->content_length ) {
1740 # get the length from a filehandle
1741 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1743 my $stat = stat $response->body;
1744 if ( $stat && $stat->size > 0 ) {
1745 $response->content_length( $stat->size );
1748 $c->log->warn('Serving filehandle without a content-length');
1752 # everything should be bytes at this point, but just in case
1753 $response->content_length( length( $response->body ) );
1758 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1759 $response->headers->remove_header("Content-Length");
1760 $response->body('');
1763 $c->finalize_cookies;
1765 $c->engine->finalize_headers( $c, @_ );
1768 $response->finalized_headers(1);
1771 =head2 $c->finalize_output
1773 An alias for finalize_body.
1775 =head2 $c->finalize_read
1777 Finalizes the input after reading is complete.
1781 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1783 =head2 $c->finalize_uploads
1785 Finalizes uploads. Cleans up any temporary files.
1789 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1791 =head2 $c->get_action( $action, $namespace )
1793 Gets an action in a given namespace.
1797 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1799 =head2 $c->get_actions( $action, $namespace )
1801 Gets all actions of a given name in a namespace and all parent
1806 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1808 =head2 $app->handle_request( @arguments )
1810 Called to handle each HTTP request.
1814 sub handle_request {
1815 my ( $class, @arguments ) = @_;
1817 # Always expect worst case!
1820 if ($class->debug) {
1821 my $secs = time - $START || 1;
1822 my $av = sprintf '%.3f', $COUNT / $secs;
1823 my $time = localtime time;
1824 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1827 my $c = $class->prepare(@arguments);
1829 $status = $c->finalize;
1832 if ( my $error = $@ ) {
1834 $class->log->error(qq/Caught exception in engine "$error"/);
1839 if(my $coderef = $class->log->can('_flush')){
1840 $class->log->$coderef();
1845 =head2 $c->prepare( @arguments )
1847 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1853 my ( $class, @arguments ) = @_;
1856 # After the app/ctxt split, this should become an attribute based on something passed
1857 # into the application.
1858 $class->context_class( ref $class || $class ) unless $class->context_class;
1860 my $c = $class->context_class->new({});
1862 # For on-demand data
1863 $c->request->_context($c);
1864 $c->response->_context($c);
1866 #surely this is not the most efficient way to do things...
1867 $c->stats($class->stats_class->new)->enable($c->use_stats);
1868 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
1869 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1872 #XXX reuse coderef from can
1873 # Allow engine to direct the prepare flow (for POE)
1874 if ( $c->engine->can('prepare') ) {
1875 $c->engine->prepare( $c, @arguments );
1878 $c->prepare_request(@arguments);
1879 $c->prepare_connection;
1880 $c->prepare_query_parameters;
1881 $c->prepare_headers;
1882 $c->prepare_cookies;
1885 # Prepare the body for reading, either by prepare_body
1886 # or the user, if they are using $c->read
1889 # Parse the body unless the user wants it on-demand
1890 unless ( ref($c)->config->{parse_on_demand} ) {
1895 my $method = $c->req->method || '';
1896 my $path = $c->req->path;
1897 $path = '/' unless length $path;
1898 my $address = $c->req->address || '';
1907 =head2 $c->prepare_action
1909 Prepares action. See L<Catalyst::Dispatcher>.
1913 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1915 =head2 $c->prepare_body
1917 Prepares message body.
1924 return if $c->request->_has_body;
1926 # Initialize on-demand data
1927 $c->engine->prepare_body( $c, @_ );
1928 $c->prepare_parameters;
1929 $c->prepare_uploads;
1932 =head2 $c->prepare_body_chunk( $chunk )
1934 Prepares a chunk of data before sending it to L<HTTP::Body>.
1936 See L<Catalyst::Engine>.
1940 sub prepare_body_chunk {
1942 $c->engine->prepare_body_chunk( $c, @_ );
1945 =head2 $c->prepare_body_parameters
1947 Prepares body parameters.
1951 sub prepare_body_parameters {
1953 $c->engine->prepare_body_parameters( $c, @_ );
1956 =head2 $c->prepare_connection
1958 Prepares connection.
1962 sub prepare_connection {
1964 $c->engine->prepare_connection( $c, @_ );
1967 =head2 $c->prepare_cookies
1973 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1975 =head2 $c->prepare_headers
1981 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1983 =head2 $c->prepare_parameters
1985 Prepares parameters.
1989 sub prepare_parameters {
1991 $c->prepare_body_parameters;
1992 $c->engine->prepare_parameters( $c, @_ );
1995 =head2 $c->prepare_path
1997 Prepares path and base.
2001 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2003 =head2 $c->prepare_query_parameters
2005 Prepares query parameters.
2009 sub prepare_query_parameters {
2012 $c->engine->prepare_query_parameters( $c, @_ );
2015 =head2 $c->log_request
2017 Writes information about the request to the debug logs. This includes:
2021 =item * Request method, path, and remote IP address
2023 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2025 =item * Request parameters
2027 =item * File uploads
2036 return unless $c->debug;
2038 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2039 my $request = $dump->[1];
2041 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2043 $path = '/' unless length $path;
2045 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2047 $c->log_request_headers($request->headers);
2049 if ( my $keywords = $request->query_keywords ) {
2050 $c->log->debug("Query keywords are: $keywords");
2053 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2055 $c->log_request_uploads($request);
2058 =head2 $c->log_response
2060 Writes information about the response to the debug logs by calling
2061 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2068 return unless $c->debug;
2070 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2071 my $response = $dump->[1];
2073 $c->log_response_status_line($response);
2074 $c->log_response_headers($response->headers);
2077 =head2 $c->log_response_status_line($response)
2079 Writes one line of information about the response to the debug logs. This includes:
2083 =item * Response status code
2085 =item * Content-Type header (if present)
2087 =item * Content-Length header (if present)
2093 sub log_response_status_line {
2094 my ($c, $response) = @_;
2098 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2099 $response->status || 'unknown',
2100 $response->headers->header('Content-Type') || 'unknown',
2101 $response->headers->header('Content-Length') || 'unknown'
2106 =head2 $c->log_response_headers($headers);
2108 Hook method which can be wrapped by plugins to log the responseheaders.
2109 No-op in the default implementation.
2113 sub log_response_headers {}
2115 =head2 $c->log_request_parameters( query => {}, body => {} )
2117 Logs request parameters to debug logs
2121 sub log_request_parameters {
2123 my %all_params = @_;
2125 return unless $c->debug;
2127 my $column_width = Catalyst::Utils::term_width() - 44;
2128 foreach my $type (qw(query body)) {
2129 my $params = $all_params{$type};
2130 next if ! keys %$params;
2131 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2132 for my $key ( sort keys %$params ) {
2133 my $param = $params->{$key};
2134 my $value = defined($param) ? $param : '';
2135 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2137 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2141 =head2 $c->log_request_uploads
2143 Logs file uploads included in the request to the debug logs.
2144 The parameter name, filename, file type, and file size are all included in
2149 sub log_request_uploads {
2151 my $request = shift;
2152 return unless $c->debug;
2153 my $uploads = $request->uploads;
2154 if ( keys %$uploads ) {
2155 my $t = Text::SimpleTable->new(
2156 [ 12, 'Parameter' ],
2161 for my $key ( sort keys %$uploads ) {
2162 my $upload = $uploads->{$key};
2163 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2164 $t->row( $key, $u->filename, $u->type, $u->size );
2167 $c->log->debug( "File Uploads are:\n" . $t->draw );
2171 =head2 $c->log_request_headers($headers);
2173 Hook method which can be wrapped by plugins to log the request headers.
2174 No-op in the default implementation.
2178 sub log_request_headers {}
2180 =head2 $c->log_headers($type => $headers)
2182 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2189 my $headers = shift; # an HTTP::Headers instance
2191 return unless $c->debug;
2193 my $column_width = Catalyst::Utils::term_width() - 28;
2194 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2197 my ( $name, $value ) = @_;
2198 $t->row( $name, $value );
2201 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2205 =head2 $c->prepare_read
2207 Prepares the input for reading.
2211 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2213 =head2 $c->prepare_request
2215 Prepares the engine request.
2219 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2221 =head2 $c->prepare_uploads
2227 sub prepare_uploads {
2230 $c->engine->prepare_uploads( $c, @_ );
2233 =head2 $c->prepare_write
2235 Prepares the output for writing.
2239 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2241 =head2 $c->request_class
2243 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2245 =head2 $c->response_class
2247 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2249 =head2 $c->read( [$maxlength] )
2251 Reads a chunk of data from the request body. This method is designed to
2252 be used in a while loop, reading C<$maxlength> bytes on every call.
2253 C<$maxlength> defaults to the size of the request if not specified.
2255 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2258 Warning: If you use read(), Catalyst will not process the body,
2259 so you will not be able to access POST parameters or file uploads via
2260 $c->request. You must handle all body parsing yourself.
2264 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2272 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2274 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2276 Sets an action in a given namespace.
2280 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2282 =head2 $c->setup_actions($component)
2284 Sets up actions for a component.
2288 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2290 =head2 $c->setup_config
2297 my %args = %{ $class->config || {} };
2299 my @container_classes = ( "${class}::Container", 'Catalyst::IOC::Container');
2300 unshift @container_classes, delete $args{container_class} if exists $args{container_class};
2302 my $container_class = Class::MOP::load_first_existing_class(@container_classes);
2304 my $container = $container_class->new( %args, name => "$class" );
2305 $class->container($container);
2307 my $config = $container->resolve(service => 'config');
2308 $class->config($config);
2309 $class->finalize_config; # back-compat
2312 =head2 $c->finalize_config
2316 sub finalize_config { }
2318 =head2 $c->setup_components
2320 This method is called internally to set up the application's components.
2322 It finds modules by calling the L<locate_components> method, expands them to
2323 package names with the L<expand_component_module> method, and then installs
2324 each component into the application.
2326 The C<setup_components> config option is passed to both of the above methods.
2328 Installation of each component is performed by the L<setup_component> method,
2333 sub setup_components {
2336 my $config = $class->config->{ setup_components };
2338 Catalyst::Exception->throw(
2339 qq{You are using search_extra config option. That option is\n} .
2340 qq{deprecated, please refer to the documentation for\n} .
2341 qq{other ways of achieving the same results.\n}
2342 ) if delete $config->{ search_extra };
2344 my @comps = $class->locate_components($config);
2345 my %comps = map { $_ => 1 } @comps;
2347 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2348 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2349 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2350 ) if $deprecatedcatalyst_component_names;
2352 for my $component ( @comps ) {
2354 # We pass ignore_loaded here so that overlay files for (e.g.)
2355 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2356 # we know M::P::O found a file on disk so this is safe
2358 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2362 $containers->{$_} = $class->container->get_sub_container($_) for qw(model view controller);
2364 for my $component (@comps) {
2365 my $instance = $class->setup_component($component);
2366 if ( my ($type, $name) = _get_component_type_name($component) ) {
2367 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $instance } ));
2369 my @expanded_components = $instance->can('expand_modules')
2370 ? $instance->expand_modules( $component, $config )
2371 : $class->expand_component_module( $component, $config );
2372 for my $component (@expanded_components) {
2373 next if $comps{$component};
2375 $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @expanded_components;
2376 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2377 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2378 ) if $deprecatedcatalyst_component_names;
2380 if (my ($type, $name) = _get_component_type_name($component)) {
2381 $containers->{$type}->add_service(Catalyst::IOC::BlockInjection->new( name => $name, block => sub { return $class->setup_component($component) } ));
2386 $containers->{model}->make_single_default;
2387 $containers->{view}->make_single_default;
2390 # FIXME: should this sub exist?
2391 # should it be moved to Catalyst::Utils,
2392 # or replaced by something already existing there?
2393 sub _get_component_type_name {
2394 my ( $component ) = @_;
2396 my @parts = split /::/, $component;
2398 while (my $type = shift @parts) {
2399 return ('controller', join '::', @parts)
2400 if $type =~ /^(c|controller)$/i;
2402 return ('model', join '::', @parts)
2403 if $type =~ /^(m|model)$/i;
2405 return ('view', join '::', @parts)
2406 if $type =~ /^(v|view)$/i;
2409 return (undef, $component);
2412 =head2 $c->locate_components( $setup_component_config )
2414 This method is meant to provide a list of component modules that should be
2415 setup for the application. By default, it will use L<Module::Pluggable>.
2417 Specify a C<setup_components> config option to pass additional options directly
2418 to L<Module::Pluggable>.
2422 sub locate_components {
2426 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2428 my $locator = Module::Pluggable::Object->new(
2429 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2433 # XXX think about ditching this sort entirely
2434 my @comps = sort { length $a <=> length $b } $locator->plugins;
2439 =head2 $c->expand_component_module( $component, $setup_component_config )
2441 Components found by C<locate_components> will be passed to this method, which
2442 is expected to return a list of component (package) names to be set up.
2446 sub expand_component_module {
2447 my ($class, $module) = @_;
2448 return Devel::InnerPackage::list_packages( $module );
2451 =head2 $c->setup_component
2455 ## FIXME - Why the hell do we try calling the ->COMPONENT method twice, this is madness!?!
2456 sub setup_component {
2457 my( $class, $component ) = @_;
2459 unless ( $component->can( 'COMPONENT' ) ) {
2463 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2464 my $config = $class->config->{ $suffix } || {};
2465 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2466 # methods also pass it. local to avoid pointlessly shitting in config
2467 # for the debug screen, as $component is already the key name.
2468 local $config->{catalyst_component_name} = $component;
2470 my $instance = eval { $component->COMPONENT( $class, $config ); };
2472 if ( my $error = $@ ) {
2474 Catalyst::Exception->throw(
2475 message => qq/Couldn't instantiate component "$component", "$error"/
2478 elsif (!blessed $instance) {
2479 my $metaclass = Moose::Util::find_meta($component);
2480 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2481 my $component_method_from = $method_meta->associated_metaclass->name;
2482 my $value = defined($instance) ? $instance : 'undef';
2483 Catalyst::Exception->throw(
2485 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2492 =head2 $c->setup_dispatcher
2498 sub setup_dispatcher {
2499 my ( $class, $dispatcher ) = @_;
2502 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2505 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2506 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2509 unless ($dispatcher) {
2510 $dispatcher = $class->dispatcher_class;
2513 Class::MOP::load_class($dispatcher);
2515 # dispatcher instance
2516 $class->dispatcher( $dispatcher->new );
2519 =head2 $c->setup_engine
2526 my ( $class, $engine ) = @_;
2529 $engine = 'Catalyst::Engine::' . $engine;
2532 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2533 $engine = 'Catalyst::Engine::' . $env;
2536 if ( $ENV{MOD_PERL} ) {
2537 my $meta = Class::MOP::get_metaclass_by_name($class);
2539 # create the apache method
2540 $meta->add_method('apache' => sub { shift->engine->apache });
2542 my ( $software, $version ) =
2543 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2546 $version =~ s/(\.[^.]+)\./$1/g;
2548 if ( $software eq 'mod_perl' ) {
2552 if ( $version >= 1.99922 ) {
2553 $engine = 'Catalyst::Engine::Apache2::MP20';
2556 elsif ( $version >= 1.9901 ) {
2557 $engine = 'Catalyst::Engine::Apache2::MP19';
2560 elsif ( $version >= 1.24 ) {
2561 $engine = 'Catalyst::Engine::Apache::MP13';
2565 Catalyst::Exception->throw( message =>
2566 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2571 # install the correct mod_perl handler
2572 if ( $version >= 1.9901 ) {
2573 *handler = sub : method {
2574 shift->handle_request(@_);
2578 *handler = sub ($$) { shift->handle_request(@_) };
2583 elsif ( $software eq 'Zeus-Perl' ) {
2584 $engine = 'Catalyst::Engine::Zeus';
2588 Catalyst::Exception->throw(
2589 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2594 $engine = $class->engine_class;
2597 Class::MOP::load_class($engine);
2599 # check for old engines that are no longer compatible
2601 if ( $engine->isa('Catalyst::Engine::Apache')
2602 && !Catalyst::Engine::Apache->VERSION )
2607 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2608 && Catalyst::Engine::Server->VERSION le '0.02' )
2613 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2614 && $engine->VERSION eq '0.01' )
2619 elsif ($engine->isa('Catalyst::Engine::Zeus')
2620 && $engine->VERSION eq '0.01' )
2626 Catalyst::Exception->throw( message =>
2627 qq/Engine "$engine" is not supported by this version of Catalyst/
2632 $class->engine( $engine->new );
2635 =head2 $c->setup_home
2637 Sets up the home directory.
2642 my ( $class, $home ) = @_;
2644 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2648 $home ||= Catalyst::Utils::home($class);
2651 #I remember recently being scolded for assigning config values like this
2652 $class->config->{home} ||= $home;
2653 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2657 =head2 $c->setup_log
2659 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2660 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2663 This method also installs a C<debug> method that returns a true value into the
2664 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2665 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2667 Note that if the log has already been setup, by either a previous call to
2668 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2669 that this method won't actually set up the log object.
2674 my ( $class, $levels ) = @_;
2677 $levels =~ s/^\s+//;
2678 $levels =~ s/\s+$//;
2679 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2681 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2682 if ( defined $env_debug ) {
2683 $levels{debug} = 1 if $env_debug; # Ugly!
2684 delete($levels{debug}) unless $env_debug;
2687 unless ( $class->log ) {
2688 $class->log( Catalyst::Log->new(keys %levels) );
2691 if ( $levels{debug} ) {
2692 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2693 $class->log->debug('Debug messages enabled');
2697 =head2 $c->setup_plugins
2703 =head2 $c->setup_stats
2705 Sets up timing statistics class.
2710 my ( $class, $stats ) = @_;
2712 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2714 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2715 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2716 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2717 $class->log->debug('Statistics enabled');
2722 =head2 $c->registered_plugins
2724 Returns a sorted list of the plugins which have either been stated in the
2725 import list or which have been added via C<< MyApp->plugin(@args); >>.
2727 If passed a given plugin name, it will report a boolean value indicating
2728 whether or not that plugin is loaded. A fully qualified name is required if
2729 the plugin name does not begin with C<Catalyst::Plugin::>.
2731 if ($c->registered_plugins('Some::Plugin')) {
2739 sub registered_plugins {
2741 return sort keys %{ $proto->_plugins } unless @_;
2743 return 1 if exists $proto->_plugins->{$plugin};
2744 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2747 sub _register_plugin {
2748 my ( $proto, $plugin, $instant ) = @_;
2749 my $class = ref $proto || $proto;
2751 Class::MOP::load_class( $plugin );
2752 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2753 if $plugin->isa( 'Catalyst::Component' );
2754 $proto->_plugins->{$plugin} = 1;
2756 my $meta = Class::MOP::get_metaclass_by_name($class);
2757 $meta->superclasses($plugin, $meta->superclasses);
2763 my ( $class, $plugins ) = @_;
2765 $class->_plugins( {} ) unless $class->_plugins;
2766 $plugins = Data::OptList::mkopt($plugins || []);
2769 [ Catalyst::Utils::resolve_namespace(
2770 $class . '::Plugin',
2771 'Catalyst::Plugin', $_->[0]
2777 for my $plugin ( reverse @plugins ) {
2778 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2779 my $meta = find_meta($plugin->[0]);
2780 next if $meta && $meta->isa('Moose::Meta::Role');
2782 $class->_register_plugin($plugin->[0]);
2786 map { $_->[0]->name, $_->[1] }
2787 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2788 map { [find_meta($_->[0]), $_->[1]] }
2791 Moose::Util::apply_all_roles(
2799 Returns an arrayref of the internal execution stack (actions that are
2800 currently executing).
2804 Returns the current timing statistics object. By default Catalyst uses
2805 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2806 L<< stats_class|/"$c->stats_class" >>.
2808 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2809 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2810 profile explicitly, although MyApp.pm still won't profile nor output anything
2813 =head2 $c->stats_class
2815 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2817 =head2 $c->use_stats
2819 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2821 Note that this is a static method, not an accessor and should be overridden
2822 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2829 =head2 $c->write( $data )
2831 Writes $data to the output stream. When using this method directly, you
2832 will need to manually set the C<Content-Length> header to the length of
2833 your output data, if known.
2840 # Finalize headers if someone manually writes output
2841 $c->finalize_headers;
2843 return $c->engine->write( $c, @_ );
2848 Returns the Catalyst version number. Mostly useful for "powered by"
2849 messages in template systems.
2853 sub version { return $Catalyst::VERSION }
2855 =head1 CONFIGURATION
2857 There are a number of 'base' config variables which can be set:
2863 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2867 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
2871 C<home> - The application home directory. In an uninstalled application,
2872 this is the top level application directory. In an installed application,
2873 this will be the directory containing C<< MyApp.pm >>.
2877 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
2881 C<name> - The name of the application in debug messages and the debug and
2886 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
2887 until it is accessed. This allows you to (for example) check authentication (and reject
2888 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
2892 C<root> - The root directory for templates. Usually this is just a
2893 subdirectory of the home directory, but you can set it to change the
2894 templates to a different directory.
2898 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
2899 to be shown in hit debug tables in the test server.
2903 C<use_request_uri_for_path> - Controlls if the C<REQUEST_URI> or C<PATH_INFO> environment
2904 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
2905 for more information.
2909 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
2913 =head1 INTERNAL ACTIONS
2915 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2916 C<_ACTION>, and C<_END>. These are by default not shown in the private
2917 action table, but you can make them visible with a config parameter.
2919 MyApp->config(show_internal_actions => 1);
2921 =head1 ON-DEMAND PARSER
2923 The request body is usually parsed at the beginning of a request,
2924 but if you want to handle input yourself, you can enable on-demand
2925 parsing with a config parameter.
2927 MyApp->config(parse_on_demand => 1);
2929 =head1 PROXY SUPPORT
2931 Many production servers operate using the common double-server approach,
2932 with a lightweight frontend web server passing requests to a larger
2933 backend server. An application running on the backend server must deal
2934 with two problems: the remote user always appears to be C<127.0.0.1> and
2935 the server's hostname will appear to be C<localhost> regardless of the
2936 virtual host that the user connected through.
2938 Catalyst will automatically detect this situation when you are running
2939 the frontend and backend servers on the same machine. The following
2940 changes are made to the request.
2942 $c->req->address is set to the user's real IP address, as read from
2943 the HTTP X-Forwarded-For header.
2945 The host value for $c->req->base and $c->req->uri is set to the real
2946 host, as read from the HTTP X-Forwarded-Host header.
2948 Additionally, you may be running your backend application on an insecure
2949 connection (port 80) while your frontend proxy is running under SSL. If there
2950 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
2951 tell Catalyst what port the frontend listens on. This will allow all URIs to
2952 be created properly.
2954 In the case of passing in:
2956 X-Forwarded-Port: 443
2958 All calls to C<uri_for> will result in an https link, as is expected.
2960 Obviously, your web server must support these headers for this to work.
2962 In a more complex server farm environment where you may have your
2963 frontend proxy server(s) on different machines, you will need to set a
2964 configuration option to tell Catalyst to read the proxied data from the
2967 MyApp->config(using_frontend_proxy => 1);
2969 If you do not wish to use the proxy support at all, you may set:
2971 MyApp->config(ignore_frontend_proxy => 1);
2973 =head1 THREAD SAFETY
2975 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2976 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2977 believe the Catalyst core to be thread-safe.
2979 If you plan to operate in a threaded environment, remember that all other
2980 modules you are using must also be thread-safe. Some modules, most notably
2981 L<DBD::SQLite>, are not thread-safe.
2987 Join #catalyst on irc.perl.org.
2991 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
2992 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
2996 http://catalyst.perl.org
3000 http://dev.catalyst.perl.org
3004 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3006 =head2 L<Catalyst::Manual> - The Catalyst Manual
3008 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3010 =head2 L<Catalyst::Engine> - Core engine
3012 =head2 L<Catalyst::Log> - Log class.
3014 =head2 L<Catalyst::Request> - Request object
3016 =head2 L<Catalyst::Response> - Response object
3018 =head2 L<Catalyst::Test> - The test suite.
3020 =head1 PROJECT FOUNDER
3022 sri: Sebastian Riedel <sri@cpan.org>
3028 acme: Leon Brocard <leon@astray.com>
3030 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3034 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3040 andyg: Andy Grundman <andy@hybridized.org>
3042 audreyt: Audrey Tang
3044 bricas: Brian Cassidy <bricas@cpan.org>
3046 Caelum: Rafael Kitover <rkitover@io.com>
3048 chansen: Christian Hansen
3050 chicks: Christopher Hicks
3052 Chisel Wright C<pause@herlpacker.co.uk>
3054 Danijel Milicevic C<me@danijel.de>
3056 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3058 David Naughton, C<naughton@umn.edu>
3062 dhoss: Devin Austin <dhoss@cpan.org>
3064 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3068 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3070 esskar: Sascha Kiefer
3072 fireartist: Carl Franks <cfranks@cpan.org>
3074 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3076 gabb: Danijel Milicevic
3080 Gavin Henry C<ghenry@perl.me.uk>
3084 groditi: Guillermo Roditi <groditi@gmail.com>
3086 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3088 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3090 jcamacho: Juan Camacho
3092 jester: Jesse Sheidlower C<jester@panix.com>
3094 jhannah: Jay Hannah <jay@jays.net>
3100 jon: Jon Schutz <jjschutz@cpan.org>
3102 Jonathan Rockway C<< <jrockway@cpan.org> >>
3104 Kieren Diment C<kd@totaldatasolution.com>
3106 konobi: Scott McWhirter <konobi@cpan.org>
3108 marcus: Marcus Ramberg <mramberg@cpan.org>
3110 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3112 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3116 naughton: David Naughton
3118 ningu: David Kamholz <dkamholz@cpan.org>
3120 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3122 numa: Dan Sully <daniel@cpan.org>
3128 omega: Andreas Marienborg
3130 Oleg Kostyuk <cub.uanic@gmail.com>
3132 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3134 rafl: Florian Ragwitz <rafl@debian.org>
3136 random: Roland Lammel <lammel@cpan.org>
3138 Robert Sedlacek C<< <rs@474.at> >>
3140 SpiceMan: Marcel Montes
3144 szbalint: Balint Szilakszi <szbalint@cpan.org>
3146 t0m: Tomas Doran <bobtfish@bobtfish.net>
3150 Viljo Marrandi C<vilts@yahoo.com>
3152 Will Hawes C<info@whawes.co.uk>
3154 willert: Sebastian Willert <willert@cpan.org>
3156 wreis: Wallace Reis <wallace@reis.org.br>
3158 Yuval Kogman, C<nothingmuch@woobling.org>
3160 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3162 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3166 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3170 This library is free software. You can redistribute it and/or modify it under
3171 the same terms as Perl itself.
3177 __PACKAGE__->meta->make_immutable;