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;
17 use Devel::InnerPackage ();
19 use Module::Pluggable::Object ();
20 use Text::SimpleTable ();
21 use Path::Class::Dir ();
22 use Path::Class::File ();
26 use Tree::Simple qw/use_weak_refs/;
27 use Tree::Simple::Visitor::FindByUID;
28 use Class::C3::Adopt::NEXT;
29 use List::MoreUtils qw/uniq/;
32 use Carp qw/croak carp shortmess/;
34 BEGIN { require 5.008004; }
36 has stack => (is => 'ro', default => sub { [] });
37 has stash => (is => 'rw', default => sub { {} });
38 has state => (is => 'rw', default => 0);
39 has stats => (is => 'rw');
40 has action => (is => 'rw');
41 has counter => (is => 'rw', default => sub { {} });
42 has request => (is => 'rw', default => sub { $_[0]->request_class->new({}) }, required => 1, lazy => 1);
43 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
44 has namespace => (is => 'rw');
46 sub depth { scalar @{ shift->stack || [] }; }
47 sub comp { shift->component(@_) }
50 my $self = shift; return $self->request(@_);
53 my $self = shift; return $self->response(@_);
56 # For backwards compatibility
57 sub finalize_output { shift->finalize_body(@_) };
62 our $RECURSION = 1000;
63 our $DETACH = Catalyst::Exception::Detach->new;
64 our $GO = Catalyst::Exception::Go->new;
66 #I imagine that very few of these really need to be class variables. if any.
67 #maybe we should just make them attributes with a default?
68 __PACKAGE__->mk_classdata($_)
69 for qw/components arguments dispatcher engine log dispatcher_class
70 engine_class context_class request_class response_class stats_class
73 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
74 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
75 __PACKAGE__->request_class('Catalyst::Request');
76 __PACKAGE__->response_class('Catalyst::Response');
77 __PACKAGE__->stats_class('Catalyst::Stats');
79 # Remember to update this in Catalyst::Runtime as well!
81 our $VERSION = '5.80019';
82 $VERSION = eval $VERSION;
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 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
106 $caller->arguments( [@arguments] );
110 sub _application { $_[0] }
114 Catalyst - The Elegant MVC Web Application Framework
118 See the L<Catalyst::Manual> distribution for comprehensive
119 documentation and tutorials.
121 # Install Catalyst::Devel for helpers and other development tools
122 # use the helper to create a new application
125 # add models, views, controllers
126 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
127 script/myapp_create.pl view MyTemplate TT
128 script/myapp_create.pl controller Search
130 # built in testserver -- use -r to restart automatically on changes
131 # --help to see all available options
132 script/myapp_server.pl
134 # command line testing interface
135 script/myapp_test.pl /yada
138 use Catalyst qw/-Debug/; # include plugins here as well
140 ### In lib/MyApp/Controller/Root.pm (autocreated)
141 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
142 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
143 $c->stash->{template} = 'foo.tt'; # set the template
144 # lookup something from db -- stash vars are passed to TT
146 $c->model('Database::Foo')->search( { country => $args[0] } );
147 if ( $c->req->params->{bar} ) { # access GET or POST parameters
148 $c->forward( 'bar' ); # process another action
149 # do something else after forward returns
153 # The foo.tt TT template can use the stash data from the database
154 [% WHILE (item = data.next) %]
158 # called for /bar/of/soap, /bar/of/soap/10, etc.
159 sub bar : Path('/bar/of/soap') { ... }
161 # called for all actions, from the top-most controller downwards
163 my ( $self, $c ) = @_;
164 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
165 $c->res->redirect( '/login' ); # require login
166 return 0; # abort request and go immediately to end()
168 return 1; # success; carry on to next action
171 # called after all actions are finished
173 my ( $self, $c ) = @_;
174 if ( scalar @{ $c->error } ) { ... } # handle errors
175 return if $c->res->body; # already have a response
176 $c->forward( 'MyApp::View::TT' ); # render template
179 ### in MyApp/Controller/Foo.pm
180 # called for /foo/bar
181 sub bar : Local { ... }
183 # called for /blargle
184 sub blargle : Global { ... }
186 # an index action matches /foo, but not /foo/1, etc.
187 sub index : Private { ... }
189 ### in MyApp/Controller/Foo/Bar.pm
190 # called for /foo/bar/baz
191 sub baz : Local { ... }
193 # first Root auto is called, then Foo auto, then this
194 sub auto : Private { ... }
196 # powerful regular expression paths are also possible
197 sub details : Regex('^product/(\w+)/details$') {
198 my ( $self, $c ) = @_;
199 # extract the (\w+) from the URI
200 my $product = $c->req->captures->[0];
203 See L<Catalyst::Manual::Intro> for additional information.
207 Catalyst is a modern framework for making web applications without the
208 pain usually associated with this process. This document is a reference
209 to the main Catalyst application. If you are a new user, we suggest you
210 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
212 See L<Catalyst::Manual> for more documentation.
214 Catalyst plugins can be loaded by naming them as arguments to the "use
215 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
216 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
219 use Catalyst qw/My::Module/;
221 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
222 fully qualify the name by using a unary plus:
226 +Fully::Qualified::Plugin::Name
229 Special flags like C<-Debug> and C<-Engine> can also be specified as
230 arguments when Catalyst is loaded:
232 use Catalyst qw/-Debug My::Module/;
234 The position of plugins and flags in the chain is important, because
235 they are loaded in the order in which they appear.
237 The following flags are supported:
241 Enables debug output. You can also force this setting from the system
242 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
243 settings override the application, with <MYAPP>_DEBUG having the highest
246 This sets the log level to 'debug' and enables full debug output on the
247 error screen. If you only want the latter, see L<< $c->debug >>.
251 Forces Catalyst to use a specific engine. Omit the
252 C<Catalyst::Engine::> prefix of the engine name, i.e.:
254 use Catalyst qw/-Engine=CGI/;
258 Forces Catalyst to use a specific home directory, e.g.:
260 use Catalyst qw[-Home=/usr/mst];
262 This can also be done in the shell environment by setting either the
263 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
264 is replaced with the uppercased name of your application, any "::" in
265 the name will be replaced with underscores, e.g. MyApp::Web should use
266 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
268 If none of these are set, Catalyst will attempt to automatically detect the
269 home directory. If you are working in a development envirnoment, Catalyst
270 will try and find the directory containing either Makefile.PL, Build.PL or
271 dist.ini. If the application has been installed into the system (i.e.
272 you have done C<make install>), then Catalyst will use the path to your
273 application module, without the .pm extension (ie, /foo/MyApp if your
274 application was installed at /foo/MyApp.pm)
278 use Catalyst '-Log=warn,fatal,error';
280 Specifies a comma-delimited list of log levels.
284 Enables statistics collection and reporting. You can also force this setting
285 from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
286 environment settings override the application, with <MYAPP>_STATS having the
291 use Catalyst qw/-Stats=1/
295 =head2 INFORMATION ABOUT THE CURRENT REQUEST
299 Returns a L<Catalyst::Action> object for the current action, which
300 stringifies to the action name. See L<Catalyst::Action>.
304 Returns the namespace of the current action, i.e., the URI prefix
305 corresponding to the controller of the current action. For example:
307 # in Controller::Foo::Bar
308 $c->namespace; # returns 'foo/bar';
314 Returns the current L<Catalyst::Request> object, giving access to
315 information about the current client request (including parameters,
316 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
318 =head2 REQUEST FLOW HANDLING
320 =head2 $c->forward( $action [, \@arguments ] )
322 =head2 $c->forward( $class, $method, [, \@arguments ] )
324 Forwards processing to another action, by its private name. If you give a
325 class name but no method, C<process()> is called. You may also optionally
326 pass arguments in an arrayref. The action will receive the arguments in
327 C<@_> and C<< $c->req->args >>. Upon returning from the function,
328 C<< $c->req->args >> will be restored to the previous values.
330 Any data C<return>ed from the action forwarded to, will be returned by the
333 my $foodata = $c->forward('/foo');
334 $c->forward('index');
335 $c->forward(qw/Model::DBIC::Foo do_stuff/);
336 $c->forward('View::TT');
338 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
339 an C<< eval { } >> around the call (actually
340 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus de-fatalizing
341 all 'dies' within the called action. If you want C<die> to propagate you
342 need to do something like:
345 die join "\n", @{ $c->error } if @{ $c->error };
347 Or make sure to always return true values from your actions and write
350 $c->forward('foo') || return;
352 Another note is that C<< $c->forward >> always returns a scalar because it
353 actually returns $c->state which operates in a scalar context.
354 Thus, something like:
358 in an action that is forwarded to is going to return a scalar,
359 i.e. how many items are in that array, which is probably not what you want.
360 If you need to return an array then return a reference to it,
363 $c->stash->{array} = \@array;
365 and access it from the stash.
369 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
371 =head2 $c->detach( $action [, \@arguments ] )
373 =head2 $c->detach( $class, $method, [, \@arguments ] )
377 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
378 doesn't return to the previous action when processing is finished.
380 When called with no arguments it escapes the processing chain entirely.
384 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
386 =head2 $c->visit( $action [, \@captures, \@arguments ] )
388 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
390 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
391 but does a full dispatch, instead of just calling the new C<$action> /
392 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
393 you go to are called, just like a new request.
395 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
396 This means, for example, that C<< $c->action >> methods such as
397 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
398 L<reverse|Catalyst::Action/reverse> return information for the visited action
399 when they are invoked within the visited action. This is different from the
400 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
401 continues to use the $c->action object from the caller action even when
402 invoked from the callee.
404 C<< $c->stash >> is kept unchanged.
406 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
407 allows you to "wrap" another action, just as it would have been called by
408 dispatching from a URL, while the analogous
409 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
410 transfer control to another action as if it had been reached directly from a URL.
414 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
416 =head2 $c->go( $action [, \@captures, \@arguments ] )
418 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
420 The relationship between C<go> and
421 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
422 the relationship between
423 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
424 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
425 C<< $c->go >> will perform a full dispatch on the specified action or method,
426 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
427 C<go> escapes the processing of the current request chain on completion, and
428 does not return to its caller.
432 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
438 Returns the current L<Catalyst::Response> object, see there for details.
442 Returns a hashref to the stash, which may be used to store data and pass
443 it between components during a request. You can also set hash keys by
444 passing arguments. The stash is automatically sent to the view. The
445 stash is cleared at the end of a request; it cannot be used for
446 persistent storage (for this you must use a session; see
447 L<Catalyst::Plugin::Session> for a complete system integrated with
450 $c->stash->{foo} = $bar;
451 $c->stash( { moose => 'majestic', qux => 0 } );
452 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
454 # stash is automatically passed to the view for use in a template
455 $c->forward( 'MyApp::View::TT' );
459 around stash => sub {
462 my $stash = $orig->($c);
464 my $new_stash = @_ > 1 ? {@_} : $_[0];
465 croak('stash takes a hash or hashref') unless ref $new_stash;
466 foreach my $key ( keys %$new_stash ) {
467 $stash->{$key} = $new_stash->{$key};
477 =head2 $c->error($error, ...)
479 =head2 $c->error($arrayref)
481 Returns an arrayref containing error messages. If Catalyst encounters an
482 error while processing a request, it stores the error in $c->error. This
483 method should only be used to store fatal error messages.
485 my @error = @{ $c->error };
489 $c->error('Something bad happened');
496 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
497 croak @$error unless ref $c;
498 push @{ $c->{error} }, @$error;
500 elsif ( defined $_[0] ) { $c->{error} = undef }
501 return $c->{error} || [];
507 Contains the return value of the last executed action.
508 Note that << $c->state >> operates in a scalar context which means that all
509 values it returns are scalar.
511 =head2 $c->clear_errors
513 Clear errors. You probably don't want to clear the errors unless you are
514 implementing a custom error screen.
516 This is equivalent to running
527 sub _comp_search_prefixes {
529 return map $c->components->{ $_ }, $c->_comp_names_search_prefixes(@_);
532 # search components given a name and some prefixes
533 sub _comp_names_search_prefixes {
534 my ( $c, $name, @prefixes ) = @_;
535 my $appclass = ref $c || $c;
536 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
537 $filter = qr/$filter/; # Compile regex now rather than once per loop
539 # map the original component name to the sub part that we will search against
540 my %eligible = map { my $n = $_; $n =~ s{^$appclass\::[^:]+::}{}; $_ => $n; }
541 grep { /$filter/ } keys %{ $c->components };
543 # undef for a name will return all
544 return keys %eligible if !defined $name;
546 my $query = ref $name ? $name : qr/^$name$/i;
547 my @result = grep { $eligible{$_} =~ m{$query} } keys %eligible;
549 return @result if @result;
551 # if we were given a regexp to search against, we're done.
554 # skip regexp fallback if configured
556 if $appclass->config->{disable_component_resolution_regex_fallback};
560 @result = grep { $eligible{ $_ } =~ m{$query} } keys %eligible;
562 # no results? try against full names
564 @result = grep { m{$query} } keys %eligible;
567 # don't warn if we didn't find any results, it just might not exist
569 # Disgusting hack to work out correct method name
570 my $warn_for = lc $prefixes[0];
571 my $msg = "Used regexp fallback for \$c->${warn_for}('${name}'), which found '" .
572 (join '", "', @result) . "'. Relying on regexp fallback behavior for " .
573 "component resolution is unreliable and unsafe.";
574 my $short = $result[0];
575 # remove the component namespace prefix
576 $short =~ s/.*?(Model|Controller|View):://;
577 my $shortmess = Carp::shortmess('');
578 if ($shortmess =~ m#Catalyst/Plugin#) {
579 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
581 } elsif ($shortmess =~ m#Catalyst/lib/(View|Controller)#) {
582 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
583 "component's config";
585 $msg .= " You probably meant \$c->${warn_for}('$short') instead of \$c->${warn_for}('${name}'), " .
586 "but if you really wanted to search, pass in a regexp as the argument " .
587 "like so: \$c->${warn_for}(qr/${name}/)";
589 $c->log->warn( "${msg}$shortmess" );
595 # Find possible names for a prefix
597 my ( $c, @prefixes ) = @_;
598 my $appclass = ref $c || $c;
600 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
602 my @names = map { s{$filter}{}; $_; }
603 $c->_comp_names_search_prefixes( undef, @prefixes );
608 # Filter a component before returning by calling ACCEPT_CONTEXT if available
609 sub _filter_component {
610 my ( $c, $comp, @args ) = @_;
612 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
613 return $comp->ACCEPT_CONTEXT( $c, @args );
619 =head2 COMPONENT ACCESSORS
621 =head2 $c->controller($name)
623 Gets a L<Catalyst::Controller> instance by name.
625 $c->controller('Foo')->do_stuff;
627 If the name is omitted, will return the controller for the dispatched
630 If you want to search for controllers, pass in a regexp as the argument.
632 # find all controllers that start with Foo
633 my @foo_controllers = $c->controller(qr{^Foo});
639 my ( $c, $name, @args ) = @_;
642 my @result = $c->_comp_search_prefixes( $name, qw/Controller C/ );
643 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
644 return $c->_filter_component( $result[ 0 ], @args );
647 return $c->component( $c->action->class );
650 =head2 $c->model($name)
652 Gets a L<Catalyst::Model> instance by name.
654 $c->model('Foo')->do_stuff;
656 Any extra arguments are directly passed to ACCEPT_CONTEXT.
658 If the name is omitted, it will look for
659 - a model object in $c->stash->{current_model_instance}, then
660 - a model name in $c->stash->{current_model}, then
661 - a config setting 'default_model', or
662 - check if there is only one model, and return it if that's the case.
664 If you want to search for models, pass in a regexp as the argument.
666 # find all models that start with Foo
667 my @foo_models = $c->model(qr{^Foo});
672 my ( $c, $name, @args ) = @_;
673 my $appclass = ref($c) || $c;
675 my @result = $c->_comp_search_prefixes( $name, qw/Model M/ );
676 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
677 return $c->_filter_component( $result[ 0 ], @args );
681 return $c->stash->{current_model_instance}
682 if $c->stash->{current_model_instance};
683 return $c->model( $c->stash->{current_model} )
684 if $c->stash->{current_model};
686 return $c->model( $appclass->config->{default_model} )
687 if $appclass->config->{default_model};
689 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/Model M/);
692 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
693 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
694 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
695 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
696 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
699 return $c->_filter_component( $comp );
703 =head2 $c->view($name)
705 Gets a L<Catalyst::View> instance by name.
707 $c->view('Foo')->do_stuff;
709 Any extra arguments are directly passed to ACCEPT_CONTEXT.
711 If the name is omitted, it will look for
712 - a view object in $c->stash->{current_view_instance}, then
713 - a view name in $c->stash->{current_view}, then
714 - a config setting 'default_view', or
715 - check if there is only one view, and return it if that's the case.
717 If you want to search for views, pass in a regexp as the argument.
719 # find all views that start with Foo
720 my @foo_views = $c->view(qr{^Foo});
725 my ( $c, $name, @args ) = @_;
727 my $appclass = ref($c) || $c;
729 my @result = $c->_comp_search_prefixes( $name, qw/View V/ );
730 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
731 return $c->_filter_component( $result[ 0 ], @args );
735 return $c->stash->{current_view_instance}
736 if $c->stash->{current_view_instance};
737 return $c->view( $c->stash->{current_view} )
738 if $c->stash->{current_view};
740 return $c->view( $appclass->config->{default_view} )
741 if $appclass->config->{default_view};
743 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/View V/);
746 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
747 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
748 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
749 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
750 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
753 return $c->_filter_component( $comp );
756 =head2 $c->controllers
758 Returns the available names which can be passed to $c->controller
764 return $c->_comp_names(qw/Controller C/);
769 Returns the available names which can be passed to $c->model
775 return $c->_comp_names(qw/Model M/);
781 Returns the available names which can be passed to $c->view
787 return $c->_comp_names(qw/View V/);
790 =head2 $c->comp($name)
792 =head2 $c->component($name)
794 Gets a component object by name. This method is not recommended,
795 unless you want to get a specific component by full
796 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
797 should be used instead.
799 If C<$name> is a regexp, a list of components matched against the full
800 component name will be returned.
802 If Catalyst can't find a component by name, it will fallback to regex
803 matching by default. To disable this behaviour set
804 disable_component_resolution_regex_fallback to a true value.
806 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
811 my ( $c, $name, @args ) = @_;
814 my $comps = $c->components;
817 # is it the exact name?
818 return $c->_filter_component( $comps->{ $name }, @args )
819 if exists $comps->{ $name };
821 # perhaps we just omitted "MyApp"?
822 my $composed = ( ref $c || $c ) . "::${name}";
823 return $c->_filter_component( $comps->{ $composed }, @args )
824 if exists $comps->{ $composed };
826 # search all of the models, views and controllers
827 my( $comp ) = $c->_comp_search_prefixes( $name, qw/Model M Controller C View V/ );
828 return $c->_filter_component( $comp, @args ) if $comp;
831 # This is here so $c->comp( '::M::' ) works
832 my $query = ref $name ? $name : qr{$name}i;
834 my @result = grep { m{$query} } keys %{ $c->components };
835 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
838 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
839 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
840 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
841 return $c->_filter_component( $result[ 0 ], @args );
844 # I would expect to return an empty list here, but that breaks back-compat
848 return sort keys %{ $c->components };
851 =head2 CLASS DATA AND HELPER CLASSES
855 Returns or takes a hashref containing the application's configuration.
857 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
859 You can also use a C<YAML>, C<XML> or L<Config::General> config file
860 like C<myapp.conf> in your applications home directory. See
861 L<Catalyst::Plugin::ConfigLoader>.
863 =head3 Cascading configuration
865 The config method is present on all Catalyst components, and configuration
866 will be merged when an application is started. Configuration loaded with
867 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
868 followed by configuration in your top level C<MyApp> class. These two
869 configurations are merged, and then configuration data whose hash key matches a
870 component name is merged with configuration for that component.
872 The configuration for a component is then passed to the C<new> method when a
873 component is constructed.
877 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
878 MyApp::Model::Foo->config({ quux => 'frob', 'overrides => 'this' });
880 will mean that C<MyApp::Model::Foo> receives the following data when
883 MyApp::Model::Foo->new({
891 around config => sub {
895 croak('Setting config after setup has been run is not allowed.')
896 if ( @_ and $c->setup_finished );
903 Returns the logging object instance. Unless it is already set, Catalyst
904 sets this up with a L<Catalyst::Log> object. To use your own log class,
905 set the logger with the C<< __PACKAGE__->log >> method prior to calling
906 C<< __PACKAGE__->setup >>.
908 __PACKAGE__->log( MyLogger->new );
913 $c->log->info( 'Now logging with my own logger!' );
915 Your log class should implement the methods described in
921 Returns 1 if debug mode is enabled, 0 otherwise.
923 You can enable debug mode in several ways:
927 =item By calling myapp_server.pl with the -d flag
929 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
931 =item The -Debug option in your MyApp.pm
933 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
937 The first three also set the log level to 'debug'.
939 Calling C<< $c->debug(1) >> has no effect.
945 =head2 $c->dispatcher
947 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
951 Returns the engine instance. See L<Catalyst::Engine>.
954 =head2 UTILITY METHODS
956 =head2 $c->path_to(@path)
958 Merges C<@path> with C<< $c->config->{home} >> and returns a
959 L<Path::Class::Dir> object. Note you can usually use this object as
960 a filename, but sometimes you will have to explicitly stringify it
961 yourself by calling the C<< ->stringify >> method.
965 $c->path_to( 'db', 'sqlite.db' );
970 my ( $c, @path ) = @_;
971 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
972 if ( -d $path ) { return $path }
973 else { return Path::Class::File->new( $c->config->{home}, @path ) }
976 =head2 $c->plugin( $name, $class, @args )
978 Helper method for plugins. It creates a class data accessor/mutator and
979 loads and instantiates the given class.
981 MyApp->plugin( 'prototype', 'HTML::Prototype' );
983 $c->prototype->define_javascript_functions;
985 B<Note:> This method of adding plugins is deprecated. The ability
986 to add plugins like this B<will be removed> in a Catalyst 5.81.
987 Please do not use this functionality in new code.
992 my ( $class, $name, $plugin, @args ) = @_;
994 # See block comment in t/unit_core_plugin.t
995 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
997 $class->_register_plugin( $plugin, 1 );
999 eval { $plugin->import };
1000 $class->mk_classdata($name);
1002 eval { $obj = $plugin->new(@args) };
1005 Catalyst::Exception->throw( message =>
1006 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1009 $class->$name($obj);
1010 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1016 Initializes the dispatcher and engine, loads any plugins, and loads the
1017 model, view, and controller components. You may also specify an array
1018 of plugins to load here, if you choose to not load them in the C<use
1022 MyApp->setup( qw/-Debug/ );
1027 my ( $class, @arguments ) = @_;
1028 croak('Running setup more than once')
1029 if ( $class->setup_finished );
1031 unless ( $class->isa('Catalyst') ) {
1033 Catalyst::Exception->throw(
1034 message => qq/'$class' does not inherit from Catalyst/ );
1037 if ( $class->arguments ) {
1038 @arguments = ( @arguments, @{ $class->arguments } );
1044 foreach (@arguments) {
1048 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1050 elsif (/^-(\w+)=?(.*)$/) {
1051 $flags->{ lc $1 } = $2;
1054 push @{ $flags->{plugins} }, $_;
1058 $class->setup_home( delete $flags->{home} );
1060 $class->setup_log( delete $flags->{log} );
1061 $class->setup_plugins( delete $flags->{plugins} );
1062 $class->setup_dispatcher( delete $flags->{dispatcher} );
1063 $class->setup_engine( delete $flags->{engine} );
1064 $class->setup_stats( delete $flags->{stats} );
1066 for my $flag ( sort keys %{$flags} ) {
1068 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1069 &$code( $class, delete $flags->{$flag} );
1072 $class->log->warn(qq/Unknown flag "$flag"/);
1076 eval { require Catalyst::Devel; };
1077 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1078 $class->log->warn(<<"EOF");
1079 You are running an old script!
1081 Please update by running (this will overwrite existing files):
1082 catalyst.pl -force -scripts $class
1084 or (this will not overwrite existing files):
1085 catalyst.pl -scripts $class
1090 if ( $class->debug ) {
1091 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1094 my $column_width = Catalyst::Utils::term_width() - 6;
1095 my $t = Text::SimpleTable->new($column_width);
1096 $t->row($_) for @plugins;
1097 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1100 my $dispatcher = $class->dispatcher;
1101 my $engine = $class->engine;
1102 my $home = $class->config->{home};
1104 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1105 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1109 ? $class->log->debug(qq/Found home "$home"/)
1110 : $class->log->debug(qq/Home "$home" doesn't exist/)
1111 : $class->log->debug(q/Couldn't find home/);
1114 # Call plugins setup, this is stupid and evil.
1115 # Also screws C3 badly on 5.10, hack to avoid.
1117 no warnings qw/redefine/;
1118 local *setup = sub { };
1119 $class->setup unless $Catalyst::__AM_RESTARTING;
1122 # Initialize our data structure
1123 $class->components( {} );
1125 $class->setup_components;
1127 if ( $class->debug ) {
1128 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1129 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1130 for my $comp ( sort keys %{ $class->components } ) {
1131 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1132 $t->row( $comp, $type );
1134 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1135 if ( keys %{ $class->components } );
1138 # Add our self to components, since we are also a component
1139 if( $class->isa('Catalyst::Controller') ){
1140 $class->components->{$class} = $class;
1143 $class->setup_actions;
1145 if ( $class->debug ) {
1146 my $name = $class->config->{name} || 'Application';
1147 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1150 # Make sure that the application class becomes immutable at this point,
1151 B::Hooks::EndOfScope::on_scope_end {
1153 my $meta = Class::MOP::get_metaclass_by_name($class);
1156 && ! { $meta->immutable_options }->{replace_constructor}
1158 $class->isa('Class::Accessor::Fast')
1159 || $class->isa('Class::Accessor')
1162 warn "You made your application class ($class) immutable, "
1163 . "but did not inline the\nconstructor. "
1164 . "This will break catalyst, as your app \@ISA "
1165 . "Class::Accessor(::Fast)?\nPlease pass "
1166 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1168 $meta->make_immutable(
1169 replace_constructor => 1,
1170 ) unless $meta->is_immutable;
1173 if ($class->config->{case_sensitive}) {
1174 $class->log->warn($class . "->config->{case_sensitive} is set.");
1175 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1178 $class->setup_finalize;
1179 # Should be the last thing we do so that user things hooking
1180 # setup_finalize can log..
1181 $class->log->_flush() if $class->log->can('_flush');
1182 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1186 =head2 $app->setup_finalize
1188 A hook to attach modifiers to.
1189 Using C<< after setup => sub{}; >> doesn't work, because of quirky things done for plugin setup.
1190 Also better than C< setup_finished(); >, as that is a getter method.
1192 sub setup_finalize {
1196 ## do stuff, i.e., determine a primary key column for sessions stored in a DB
1198 $app->next::method(@_);
1205 sub setup_finalize {
1207 $class->setup_finished(1);
1210 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1212 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1214 Constructs an absolute L<URI> object based on the application root, the
1215 provided path, and the additional arguments and query parameters provided.
1216 When used as a string, provides a textual URI.
1218 If no arguments are provided, the URI for the current action is returned.
1219 To return the current action and also provide @args, use
1220 C<< $c->uri_for( $c->action, @args ) >>.
1222 If the first argument is a string, it is taken as a public URI path relative
1223 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1224 relative to the application root (if it does). It is then merged with
1225 C<< $c->request->base >>; any C<@args> are appended as additional path
1226 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1228 If the first argument is a L<Catalyst::Action> it represents an action which
1229 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1230 optional C<\@captures> argument (an arrayref) allows passing the captured
1231 variables that are needed to fill in the paths of Chained and Regex actions;
1232 once the path is resolved, C<uri_for> continues as though a path was
1233 provided, appending any arguments or parameters and creating an absolute
1236 The captures for the current request can be found in
1237 C<< $c->request->captures >>, and actions can be resolved using
1238 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1239 path, use C<< $c->uri_for_action >> instead.
1241 # Equivalent to $c->req->uri
1242 $c->uri_for($c->action, $c->req->captures,
1243 @{ $c->req->args }, $c->req->params);
1245 # For the Foo action in the Bar controller
1246 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1248 # Path to a static resource
1249 $c->uri_for('/static/images/logo.png');
1254 my ( $c, $path, @args ) = @_;
1256 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1257 $path = $path->path_prefix;
1262 undef($path) if (defined $path && $path eq '');
1265 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1267 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1268 s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
1269 if (blessed $path) { # Action object only.
1270 s|/|%2F|g for @args;
1273 if ( blessed($path) ) { # action object
1274 my $captures = [ map { s|/|%2F|g; $_; }
1275 ( scalar @args && ref $args[0] eq 'ARRAY'
1279 $path = $c->dispatcher->uri_for_action($action, $captures);
1280 if (not defined $path) {
1281 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1285 $path = '/' if $path eq '';
1288 unshift(@args, $path);
1290 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1291 my $namespace = $c->namespace;
1292 if (defined $path) { # cheesy hack to handle path '../foo'
1293 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1295 unshift(@args, $namespace || '');
1298 # join args with '/', or a blank string
1299 my $args = join('/', grep { defined($_) } @args);
1300 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1302 my $base = $c->req->base;
1303 my $class = ref($base);
1304 $base =~ s{(?<!/)$}{/};
1308 if (my @keys = keys %$params) {
1309 # somewhat lifted from URI::_query's query_form
1310 $query = '?'.join('&', map {
1311 my $val = $params->{$_};
1312 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1315 $val = '' unless defined $val;
1318 utf8::encode( $param ) if utf8::is_utf8($param);
1319 # using the URI::Escape pattern here so utf8 chars survive
1320 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1322 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1326 my $res = bless(\"${base}${args}${query}", $class);
1330 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1332 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1338 A private path to the Catalyst action you want to create a URI for.
1340 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1341 >> and passing the resulting C<$action> and the remaining arguments to C<<
1344 You can also pass in a Catalyst::Action object, in which case it is passed to
1347 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.
1349 For example, if the action looks like:
1351 package MyApp::Controller::Users;
1353 sub lst : Path('the-list') {}
1357 $c->uri_for_action('/users/lst')
1359 and it will create the URI /users/the-list.
1365 sub uri_for_action {
1366 my ( $c, $path, @args ) = @_;
1367 my $action = blessed($path)
1369 : $c->dispatcher->get_action_by_path($path);
1370 unless (defined $action) {
1371 croak "Can't find action for path '$path'";
1373 return $c->uri_for( $action, @args );
1376 =head2 $c->welcome_message
1378 Returns the Catalyst welcome HTML page.
1382 sub welcome_message {
1384 my $name = $c->config->{name};
1385 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1386 my $prefix = Catalyst::Utils::appprefix( ref $c );
1387 $c->response->content_type('text/html; charset=utf-8');
1389 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1390 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1391 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1393 <meta http-equiv="Content-Language" content="en" />
1394 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1395 <title>$name on Catalyst $VERSION</title>
1396 <style type="text/css">
1399 background-color: #eee;
1406 margin-bottom: 10px;
1408 background-color: #ccc;
1409 border: 1px solid #aaa;
1414 font-family: verdana, tahoma, sans-serif;
1417 font-family: verdana, tahoma, sans-serif;
1420 text-decoration: none;
1422 border-bottom: 1px dotted #bbb;
1424 :link:hover, :visited:hover {
1437 background-color: #fff;
1438 border: 1px solid #aaa;
1442 font-weight: normal;
1464 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1469 <img src="$logo" alt="Catalyst Logo" />
1471 <p>Welcome to the world of Catalyst.
1472 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1473 framework will make web development something you had
1474 never expected it to be: Fun, rewarding, and quick.</p>
1475 <h2>What to do now?</h2>
1476 <p>That really depends on what <b>you</b> want to do.
1477 We do, however, provide you with a few starting points.</p>
1478 <p>If you want to jump right into web development with Catalyst
1479 you might want to start with a tutorial.</p>
1480 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1482 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1484 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1485 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1487 <h2>What to do next?</h2>
1488 <p>Next it's time to write an actual application. Use the
1489 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1490 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1491 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1492 they can save you a lot of work.</p>
1493 <pre><code>script/${prefix}_create.pl -help</code></pre>
1494 <p>Also, be sure to check out the vast and growing
1495 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1496 you are likely to find what you need there.
1500 <p>Catalyst has a very active community. Here are the main places to
1501 get in touch with us.</p>
1504 <a href="http://dev.catalyst.perl.org">Wiki</a>
1507 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1510 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1513 <h2>In conclusion</h2>
1514 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1515 as we enjoyed making it. Please contact us if you have ideas
1516 for improvement or other feedback.</p>
1524 =head1 INTERNAL METHODS
1526 These methods are not meant to be used by end users.
1528 =head2 $c->components
1530 Returns a hash of components.
1532 =head2 $c->context_class
1534 Returns or sets the context class.
1538 Returns a hashref containing coderefs and execution counts (needed for
1539 deep recursion detection).
1543 Returns the number of actions on the current internal execution stack.
1547 Dispatches a request to actions.
1551 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1553 =head2 $c->dispatcher_class
1555 Returns or sets the dispatcher class.
1557 =head2 $c->dump_these
1559 Returns a list of 2-element array references (name, structure) pairs
1560 that will be dumped on the error page in debug mode.
1566 [ Request => $c->req ],
1567 [ Response => $c->res ],
1568 [ Stash => $c->stash ],
1569 [ Config => $c->config ];
1572 =head2 $c->engine_class
1574 Returns or sets the engine class.
1576 =head2 $c->execute( $class, $coderef )
1578 Execute a coderef in given class and catch exceptions. Errors are available
1584 my ( $c, $class, $code ) = @_;
1585 $class = $c->component($class) || $class;
1588 if ( $c->depth >= $RECURSION ) {
1589 my $action = $code->reverse();
1590 $action = "/$action" unless $action =~ /->/;
1591 my $error = qq/Deep recursion detected calling "${action}"/;
1592 $c->log->error($error);
1598 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1600 push( @{ $c->stack }, $code );
1602 no warnings 'recursion';
1603 eval { $c->state( $code->execute( $class, $c, @{ $c->req->args } ) || 0 ) };
1605 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1607 my $last = pop( @{ $c->stack } );
1609 if ( my $error = $@ ) {
1610 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1611 $error->rethrow if $c->depth > 1;
1613 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1614 $error->rethrow if $c->depth > 0;
1617 unless ( ref $error ) {
1618 no warnings 'uninitialized';
1620 my $class = $last->class;
1621 my $name = $last->name;
1622 $error = qq/Caught exception in $class->$name "$error"/;
1631 sub _stats_start_execute {
1632 my ( $c, $code ) = @_;
1633 my $appclass = ref($c) || $c;
1634 return if ( ( $code->name =~ /^_.*/ )
1635 && ( !$appclass->config->{show_internal_actions} ) );
1637 my $action_name = $code->reverse();
1638 $c->counter->{$action_name}++;
1640 my $action = $action_name;
1641 $action = "/$action" unless $action =~ /->/;
1643 # determine if the call was the result of a forward
1644 # this is done by walking up the call stack and looking for a calling
1645 # sub of Catalyst::forward before the eval
1647 for my $index ( 2 .. 11 ) {
1649 if ( ( caller($index) )[0] eq 'Catalyst'
1650 && ( caller($index) )[3] eq '(eval)' );
1652 if ( ( caller($index) )[3] =~ /forward$/ ) {
1653 $callsub = ( caller($index) )[3];
1654 $action = "-> $action";
1659 my $uid = $action_name . $c->counter->{$action_name};
1661 # is this a root-level call or a forwarded call?
1662 if ( $callsub =~ /forward$/ ) {
1663 my $parent = $c->stack->[-1];
1665 # forward, locate the caller
1666 if ( exists $c->counter->{"$parent"} ) {
1669 parent => "$parent" . $c->counter->{"$parent"},
1675 # forward with no caller may come from a plugin
1694 sub _stats_finish_execute {
1695 my ( $c, $info ) = @_;
1696 $c->stats->profile( end => $info );
1701 Finalizes the request.
1708 for my $error ( @{ $c->error } ) {
1709 $c->log->error($error);
1712 # Allow engine to handle finalize flow (for POE)
1713 my $engine = $c->engine;
1714 if ( my $code = $engine->can('finalize') ) {
1719 $c->finalize_uploads;
1722 if ( $#{ $c->error } >= 0 ) {
1726 $c->finalize_headers;
1729 if ( $c->request->method eq 'HEAD' ) {
1730 $c->response->body('');
1736 if ($c->use_stats) {
1737 my $elapsed = sprintf '%f', $c->stats->elapsed;
1738 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1740 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1743 return $c->response->status;
1746 =head2 $c->finalize_body
1752 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1754 =head2 $c->finalize_cookies
1760 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1762 =head2 $c->finalize_error
1768 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1770 =head2 $c->finalize_headers
1776 sub finalize_headers {
1779 my $response = $c->response; #accessor calls can add up?
1781 # Check if we already finalized headers
1782 return if $response->finalized_headers;
1785 if ( my $location = $response->redirect ) {
1786 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1787 $response->header( Location => $location );
1789 if ( !$response->has_body ) {
1790 # Add a default body if none is already present
1792 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1798 if ( $response->body && !$response->content_length ) {
1800 # get the length from a filehandle
1801 if ( blessed( $response->body ) && $response->body->can('read') )
1803 my $stat = stat $response->body;
1804 if ( $stat && $stat->size > 0 ) {
1805 $response->content_length( $stat->size );
1808 $c->log->warn('Serving filehandle without a content-length');
1812 # everything should be bytes at this point, but just in case
1813 $response->content_length( length( $response->body ) );
1818 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1819 $response->headers->remove_header("Content-Length");
1820 $response->body('');
1823 $c->finalize_cookies;
1825 $c->engine->finalize_headers( $c, @_ );
1828 $response->finalized_headers(1);
1831 =head2 $c->finalize_output
1833 An alias for finalize_body.
1835 =head2 $c->finalize_read
1837 Finalizes the input after reading is complete.
1841 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1843 =head2 $c->finalize_uploads
1845 Finalizes uploads. Cleans up any temporary files.
1849 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1851 =head2 $c->get_action( $action, $namespace )
1853 Gets an action in a given namespace.
1857 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1859 =head2 $c->get_actions( $action, $namespace )
1861 Gets all actions of a given name in a namespace and all parent
1866 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1868 =head2 $c->handle_request( $class, @arguments )
1870 Called to handle each HTTP request.
1874 sub handle_request {
1875 my ( $class, @arguments ) = @_;
1877 # Always expect worst case!
1880 if ($class->debug) {
1881 my $secs = time - $START || 1;
1882 my $av = sprintf '%.3f', $COUNT / $secs;
1883 my $time = localtime time;
1884 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1887 my $c = $class->prepare(@arguments);
1889 $status = $c->finalize;
1892 if ( my $error = $@ ) {
1894 $class->log->error(qq/Caught exception in engine "$error"/);
1899 if(my $coderef = $class->log->can('_flush')){
1900 $class->log->$coderef();
1905 =head2 $c->prepare( @arguments )
1907 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1913 my ( $class, @arguments ) = @_;
1916 # After the app/ctxt split, this should become an attribute based on something passed
1917 # into the application.
1918 $class->context_class( ref $class || $class ) unless $class->context_class;
1920 my $c = $class->context_class->new({});
1922 # For on-demand data
1923 $c->request->_context($c);
1924 $c->response->_context($c);
1926 #surely this is not the most efficient way to do things...
1927 $c->stats($class->stats_class->new)->enable($c->use_stats);
1929 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1932 #XXX reuse coderef from can
1933 # Allow engine to direct the prepare flow (for POE)
1934 if ( $c->engine->can('prepare') ) {
1935 $c->engine->prepare( $c, @arguments );
1938 $c->prepare_request(@arguments);
1939 $c->prepare_connection;
1940 $c->prepare_query_parameters;
1941 $c->prepare_headers;
1942 $c->prepare_cookies;
1945 # Prepare the body for reading, either by prepare_body
1946 # or the user, if they are using $c->read
1949 # Parse the body unless the user wants it on-demand
1950 unless ( ref($c)->config->{parse_on_demand} ) {
1955 my $method = $c->req->method || '';
1956 my $path = $c->req->path;
1957 $path = '/' unless length $path;
1958 my $address = $c->req->address || '';
1960 $c->log->debug(qq/"$method" request for "$path" from "$address"/)
1968 =head2 $c->prepare_action
1970 Prepares action. See L<Catalyst::Dispatcher>.
1974 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1976 =head2 $c->prepare_body
1978 Prepares message body.
1985 return if $c->request->_has_body;
1987 # Initialize on-demand data
1988 $c->engine->prepare_body( $c, @_ );
1989 $c->prepare_parameters;
1990 $c->prepare_uploads;
1992 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1993 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1994 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1995 my $param = $c->req->body_parameters->{$key};
1996 my $value = defined($param) ? $param : '';
1998 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2000 $c->log->debug( "Body Parameters are:\n" . $t->draw );
2004 =head2 $c->prepare_body_chunk( $chunk )
2006 Prepares a chunk of data before sending it to L<HTTP::Body>.
2008 See L<Catalyst::Engine>.
2012 sub prepare_body_chunk {
2014 $c->engine->prepare_body_chunk( $c, @_ );
2017 =head2 $c->prepare_body_parameters
2019 Prepares body parameters.
2023 sub prepare_body_parameters {
2025 $c->engine->prepare_body_parameters( $c, @_ );
2028 =head2 $c->prepare_connection
2030 Prepares connection.
2034 sub prepare_connection {
2036 $c->engine->prepare_connection( $c, @_ );
2039 =head2 $c->prepare_cookies
2045 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2047 =head2 $c->prepare_headers
2053 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2055 =head2 $c->prepare_parameters
2057 Prepares parameters.
2061 sub prepare_parameters {
2063 $c->prepare_body_parameters;
2064 $c->engine->prepare_parameters( $c, @_ );
2067 =head2 $c->prepare_path
2069 Prepares path and base.
2073 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2075 =head2 $c->prepare_query_parameters
2077 Prepares query parameters.
2081 sub prepare_query_parameters {
2084 $c->engine->prepare_query_parameters( $c, @_ );
2086 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
2087 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
2088 for my $key ( sort keys %{ $c->req->query_parameters } ) {
2089 my $param = $c->req->query_parameters->{$key};
2090 my $value = defined($param) ? $param : '';
2092 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2094 $c->log->debug( "Query Parameters are:\n" . $t->draw );
2098 =head2 $c->prepare_read
2100 Prepares the input for reading.
2104 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2106 =head2 $c->prepare_request
2108 Prepares the engine request.
2112 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2114 =head2 $c->prepare_uploads
2120 sub prepare_uploads {
2123 $c->engine->prepare_uploads( $c, @_ );
2125 if ( $c->debug && keys %{ $c->request->uploads } ) {
2126 my $t = Text::SimpleTable->new(
2127 [ 12, 'Parameter' ],
2132 for my $key ( sort keys %{ $c->request->uploads } ) {
2133 my $upload = $c->request->uploads->{$key};
2134 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2135 $t->row( $key, $u->filename, $u->type, $u->size );
2138 $c->log->debug( "File Uploads are:\n" . $t->draw );
2142 =head2 $c->prepare_write
2144 Prepares the output for writing.
2148 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2150 =head2 $c->request_class
2152 Returns or sets the request class.
2154 =head2 $c->response_class
2156 Returns or sets the response class.
2158 =head2 $c->read( [$maxlength] )
2160 Reads a chunk of data from the request body. This method is designed to
2161 be used in a while loop, reading C<$maxlength> bytes on every call.
2162 C<$maxlength> defaults to the size of the request if not specified.
2164 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2167 Warning: If you use read(), Catalyst will not process the body,
2168 so you will not be able to access POST parameters or file uploads via
2169 $c->request. You must handle all body parsing yourself.
2173 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2181 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2183 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2185 Sets an action in a given namespace.
2189 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2191 =head2 $c->setup_actions($component)
2193 Sets up actions for a component.
2197 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2199 =head2 $c->setup_components
2201 This method is called internally to set up the application's components.
2203 It finds modules by calling the L<locate_components> method, expands them to
2204 package names with the L<expand_component_module> method, and then installs
2205 each component into the application.
2207 The C<setup_components> config option is passed to both of the above methods.
2209 Installation of each component is performed by the L<setup_component> method,
2214 sub setup_components {
2217 my $config = $class->config->{ setup_components };
2219 my @comps = sort { length $a <=> length $b }
2220 $class->locate_components($config);
2221 my %comps = map { $_ => 1 } @comps;
2223 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2224 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2225 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2226 ) if $deprecatedcatalyst_component_names;
2228 for my $component ( @comps ) {
2230 # We pass ignore_loaded here so that overlay files for (e.g.)
2231 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2232 # we know M::P::O found a file on disk so this is safe
2234 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2236 # Needs to be done as soon as the component is loaded, as loading a sub-component
2237 # (next time round the loop) can cause us to get the wrong metaclass..
2238 $class->_controller_init_base_classes($component);
2241 for my $component (@comps) {
2242 $class->components->{ $component } = $class->setup_component($component);
2243 for my $component ($class->expand_component_module( $component, $config )) {
2244 next if $comps{$component};
2245 $class->_controller_init_base_classes($component); # Also cover inner packages
2246 $class->components->{ $component } = $class->setup_component($component);
2251 =head2 $c->locate_components( $setup_component_config )
2253 This method is meant to provide a list of component modules that should be
2254 setup for the application. By default, it will use L<Module::Pluggable>.
2256 Specify a C<setup_components> config option to pass additional options directly
2257 to L<Module::Pluggable>. To add additional search paths, specify a key named
2258 C<search_extra> as an array reference. Items in the array beginning with C<::>
2259 will have the application class name prepended to them.
2263 sub locate_components {
2267 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2268 my $extra = delete $config->{ search_extra } || [];
2270 push @paths, @$extra;
2272 my $locator = Module::Pluggable::Object->new(
2273 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2277 my @comps = $locator->plugins;
2282 =head2 $c->expand_component_module( $component, $setup_component_config )
2284 Components found by C<locate_components> will be passed to this method, which
2285 is expected to return a list of component (package) names to be set up.
2289 sub expand_component_module {
2290 my ($class, $module) = @_;
2291 return Devel::InnerPackage::list_packages( $module );
2294 =head2 $c->setup_component
2298 # FIXME - Ugly, ugly hack to ensure the we force initialize non-moose base classes
2299 # nearest to Catalyst::Controller first, no matter what order stuff happens
2300 # to be loaded. There are TODO tests in Moose for this, see
2301 # f2391d17574eff81d911b97be15ea51080500003
2302 sub _controller_init_base_classes {
2303 my ($app_class, $component) = @_;
2304 return unless $component->isa('Catalyst::Controller');
2305 foreach my $class ( reverse @{ mro::get_linear_isa($component) } ) {
2306 Moose::Meta::Class->initialize( $class )
2307 unless find_meta($class);
2311 sub setup_component {
2312 my( $class, $component ) = @_;
2314 unless ( $component->can( 'COMPONENT' ) ) {
2318 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2319 my $config = $class->config->{ $suffix } || {};
2320 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2321 # methods also pass it. local to avoid pointlessly shitting in config
2322 # for the debug screen, as $component is already the key name.
2323 local $config->{catalyst_component_name} = $component;
2325 my $instance = eval { $component->COMPONENT( $class, $config ); };
2327 if ( my $error = $@ ) {
2329 Catalyst::Exception->throw(
2330 message => qq/Couldn't instantiate component "$component", "$error"/
2334 unless (blessed $instance) {
2335 my $metaclass = Moose::Util::find_meta($component);
2336 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2337 my $component_method_from = $method_meta->associated_metaclass->name;
2338 my $value = defined($instance) ? $instance : 'undef';
2339 Catalyst::Exception->throw(
2341 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2347 =head2 $c->setup_dispatcher
2353 sub setup_dispatcher {
2354 my ( $class, $dispatcher ) = @_;
2357 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2360 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2361 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2364 unless ($dispatcher) {
2365 $dispatcher = $class->dispatcher_class;
2368 Class::MOP::load_class($dispatcher);
2370 # dispatcher instance
2371 $class->dispatcher( $dispatcher->new );
2374 =head2 $c->setup_engine
2381 my ( $class, $engine ) = @_;
2384 $engine = 'Catalyst::Engine::' . $engine;
2387 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2388 $engine = 'Catalyst::Engine::' . $env;
2391 if ( $ENV{MOD_PERL} ) {
2392 my $meta = Class::MOP::get_metaclass_by_name($class);
2394 # create the apache method
2395 $meta->add_method('apache' => sub { shift->engine->apache });
2397 my ( $software, $version ) =
2398 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2401 $version =~ s/(\.[^.]+)\./$1/g;
2403 if ( $software eq 'mod_perl' ) {
2407 if ( $version >= 1.99922 ) {
2408 $engine = 'Catalyst::Engine::Apache2::MP20';
2411 elsif ( $version >= 1.9901 ) {
2412 $engine = 'Catalyst::Engine::Apache2::MP19';
2415 elsif ( $version >= 1.24 ) {
2416 $engine = 'Catalyst::Engine::Apache::MP13';
2420 Catalyst::Exception->throw( message =>
2421 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2426 # install the correct mod_perl handler
2427 if ( $version >= 1.9901 ) {
2428 *handler = sub : method {
2429 shift->handle_request(@_);
2433 *handler = sub ($$) { shift->handle_request(@_) };
2438 elsif ( $software eq 'Zeus-Perl' ) {
2439 $engine = 'Catalyst::Engine::Zeus';
2443 Catalyst::Exception->throw(
2444 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2449 $engine = $class->engine_class;
2452 Class::MOP::load_class($engine);
2454 # check for old engines that are no longer compatible
2456 if ( $engine->isa('Catalyst::Engine::Apache')
2457 && !Catalyst::Engine::Apache->VERSION )
2462 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2463 && Catalyst::Engine::Server->VERSION le '0.02' )
2468 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2469 && $engine->VERSION eq '0.01' )
2474 elsif ($engine->isa('Catalyst::Engine::Zeus')
2475 && $engine->VERSION eq '0.01' )
2481 Catalyst::Exception->throw( message =>
2482 qq/Engine "$engine" is not supported by this version of Catalyst/
2487 $class->engine( $engine->new );
2490 =head2 $c->setup_home
2492 Sets up the home directory.
2497 my ( $class, $home ) = @_;
2499 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2503 $home ||= Catalyst::Utils::home($class);
2506 #I remember recently being scolded for assigning config values like this
2507 $class->config->{home} ||= $home;
2508 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2512 =head2 $c->setup_log
2514 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2515 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2518 This method also installs a C<debug> method that returns a true value into the
2519 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2520 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2522 Note that if the log has already been setup, by either a previous call to
2523 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2524 that this method won't actually set up the log object.
2529 my ( $class, $levels ) = @_;
2532 $levels =~ s/^\s+//;
2533 $levels =~ s/\s+$//;
2534 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2536 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2537 if ( defined $env_debug ) {
2538 $levels{debug} = 1 if $env_debug; # Ugly!
2539 delete($levels{debug}) unless $env_debug;
2542 unless ( $class->log ) {
2543 $class->log( Catalyst::Log->new(keys %levels) );
2546 if ( $levels{debug} ) {
2547 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2548 $class->log->debug('Debug messages enabled');
2552 =head2 $c->setup_plugins
2558 =head2 $c->setup_stats
2560 Sets up timing statistics class.
2565 my ( $class, $stats ) = @_;
2567 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2569 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2570 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2571 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2572 $class->log->debug('Statistics enabled');
2577 =head2 $c->registered_plugins
2579 Returns a sorted list of the plugins which have either been stated in the
2580 import list or which have been added via C<< MyApp->plugin(@args); >>.
2582 If passed a given plugin name, it will report a boolean value indicating
2583 whether or not that plugin is loaded. A fully qualified name is required if
2584 the plugin name does not begin with C<Catalyst::Plugin::>.
2586 if ($c->registered_plugins('Some::Plugin')) {
2594 sub registered_plugins {
2596 return sort keys %{ $proto->_plugins } unless @_;
2598 return 1 if exists $proto->_plugins->{$plugin};
2599 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2602 sub _register_plugin {
2603 my ( $proto, $plugin, $instant ) = @_;
2604 my $class = ref $proto || $proto;
2606 Class::MOP::load_class( $plugin );
2607 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is decated and will not work in 5.81" )
2608 if $plugin->isa( 'Catalyst::Component' );
2609 $proto->_plugins->{$plugin} = 1;
2612 if ( my $meta = Class::MOP::get_metaclass_by_name($class) ) {
2613 my @superclasses = ($plugin, $meta->superclasses );
2614 $meta->superclasses(@superclasses);
2616 unshift @{"$class\::ISA"}, $plugin;
2623 my ( $class, $plugins ) = @_;
2625 $class->_plugins( {} ) unless $class->_plugins;
2628 my @plugins = Catalyst::Utils::resolve_namespace($class . '::Plugin', 'Catalyst::Plugin', @$plugins);
2630 for my $plugin ( reverse @plugins ) {
2631 Class::MOP::load_class($plugin);
2632 my $meta = find_meta($plugin);
2633 next if $meta && $meta->isa('Moose::Meta::Role');
2635 $class->_register_plugin($plugin);
2640 grep { $_ && blessed($_) && $_->isa('Moose::Meta::Role') }
2641 map { find_meta($_) }
2644 Moose::Util::apply_all_roles(
2652 Returns an arrayref of the internal execution stack (actions that are
2653 currently executing).
2655 =head2 $c->stats_class
2657 Returns or sets the stats (timing statistics) class.
2659 =head2 $c->use_stats
2661 Returns 1 when stats collection is enabled. Stats collection is enabled
2662 when the -Stats options is set, debug is on or when the <MYAPP>_STATS
2663 environment variable is set.
2665 Note that this is a static method, not an accessor and should be overridden
2666 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2673 =head2 $c->write( $data )
2675 Writes $data to the output stream. When using this method directly, you
2676 will need to manually set the C<Content-Length> header to the length of
2677 your output data, if known.
2684 # Finalize headers if someone manually writes output
2685 $c->finalize_headers;
2687 return $c->engine->write( $c, @_ );
2692 Returns the Catalyst version number. Mostly useful for "powered by"
2693 messages in template systems.
2697 sub version { return $Catalyst::VERSION }
2699 =head1 CONFIGURATION
2701 There are a number of 'base' config variables which can be set:
2707 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2711 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
2715 C<disable_component_resolution_regex_fallback> - Turns
2716 off the deprecated component resolution functionality so
2717 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
2718 are called then regex search will not be attempted on string values and
2719 instead C<undef> will be returned.
2723 C<home> - The application home directory. In an uninstalled application,
2724 this is the top level application directory. In an installed application,
2725 this will be the directory containing C<< MyApp.pm >>.
2729 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
2733 C<name> - The name of the application in debug messages and the debug and
2738 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
2739 until it is accessed. This allows you to (for example) check authentication (and reject
2740 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
2744 C<root> - The root directory for templates. Usually this is just a
2745 subdirectory of the home directory, but you can set it to change the
2746 templates to a different directory.
2750 C<search_extra> - Array reference passed to Module::Pluggable to for additional
2751 namespaces from which components will be loaded (and constructed and stored in
2752 C<< $c->components >>).
2756 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
2757 to be shown in hit debug tables in the test server.
2761 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
2765 =head1 INTERNAL ACTIONS
2767 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2768 C<_ACTION>, and C<_END>. These are by default not shown in the private
2769 action table, but you can make them visible with a config parameter.
2771 MyApp->config(show_internal_actions => 1);
2773 =head1 ON-DEMAND PARSER
2775 The request body is usually parsed at the beginning of a request,
2776 but if you want to handle input yourself, you can enable on-demand
2777 parsing with a config parameter.
2779 MyApp->config(parse_on_demand => 1);
2781 =head1 PROXY SUPPORT
2783 Many production servers operate using the common double-server approach,
2784 with a lightweight frontend web server passing requests to a larger
2785 backend server. An application running on the backend server must deal
2786 with two problems: the remote user always appears to be C<127.0.0.1> and
2787 the server's hostname will appear to be C<localhost> regardless of the
2788 virtual host that the user connected through.
2790 Catalyst will automatically detect this situation when you are running
2791 the frontend and backend servers on the same machine. The following
2792 changes are made to the request.
2794 $c->req->address is set to the user's real IP address, as read from
2795 the HTTP X-Forwarded-For header.
2797 The host value for $c->req->base and $c->req->uri is set to the real
2798 host, as read from the HTTP X-Forwarded-Host header.
2800 Additionally, you may be running your backend application on an insecure
2801 connection (port 80) while your frontend proxy is running under SSL. If there
2802 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
2803 tell Catalyst what port the frontend listens on. This will allow all URIs to
2804 be created properly.
2806 In the case of passing in:
2808 X-Forwarded-Port: 443
2810 All calls to C<uri_for> will result in an https link, as is expected.
2812 Obviously, your web server must support these headers for this to work.
2814 In a more complex server farm environment where you may have your
2815 frontend proxy server(s) on different machines, you will need to set a
2816 configuration option to tell Catalyst to read the proxied data from the
2819 MyApp->config(using_frontend_proxy => 1);
2821 If you do not wish to use the proxy support at all, you may set:
2823 MyApp->config(ignore_frontend_proxy => 1);
2825 =head1 THREAD SAFETY
2827 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2828 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2829 believe the Catalyst core to be thread-safe.
2831 If you plan to operate in a threaded environment, remember that all other
2832 modules you are using must also be thread-safe. Some modules, most notably
2833 L<DBD::SQLite>, are not thread-safe.
2839 Join #catalyst on irc.perl.org.
2843 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
2844 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
2848 http://catalyst.perl.org
2852 http://dev.catalyst.perl.org
2856 =head2 L<Task::Catalyst> - All you need to start with Catalyst
2858 =head2 L<Catalyst::Manual> - The Catalyst Manual
2860 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
2862 =head2 L<Catalyst::Engine> - Core engine
2864 =head2 L<Catalyst::Log> - Log class.
2866 =head2 L<Catalyst::Request> - Request object
2868 =head2 L<Catalyst::Response> - Response object
2870 =head2 L<Catalyst::Test> - The test suite.
2872 =head1 PROJECT FOUNDER
2874 sri: Sebastian Riedel <sri@cpan.org>
2880 acme: Leon Brocard <leon@astray.com>
2882 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
2886 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
2890 andyg: Andy Grundman <andy@hybridized.org>
2892 audreyt: Audrey Tang
2894 bricas: Brian Cassidy <bricas@cpan.org>
2896 Caelum: Rafael Kitover <rkitover@io.com>
2898 chansen: Christian Hansen
2900 chicks: Christopher Hicks
2902 Chisel Wright C<pause@herlpacker.co.uk>
2904 Danijel Milicevic C<me@danijel.de>
2906 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
2908 David Naughton, C<naughton@umn.edu>
2912 dhoss: Devin Austin <dhoss@cpan.org>
2914 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
2918 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
2920 esskar: Sascha Kiefer
2922 fireartist: Carl Franks <cfranks@cpan.org>
2924 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
2926 gabb: Danijel Milicevic
2930 Gavin Henry C<ghenry@perl.me.uk>
2934 groditi: Guillermo Roditi <groditi@gmail.com>
2936 hobbs: Andrew Rodland <andrew@cleverdomain.org>
2938 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
2940 jcamacho: Juan Camacho
2942 jester: Jesse Sheidlower C<jester@panix.com>
2944 jhannah: Jay Hannah <jay@jays.net>
2950 jon: Jon Schutz <jjschutz@cpan.org>
2952 Jonathan Rockway C<< <jrockway@cpan.org> >>
2954 Kieren Diment C<kd@totaldatasolution.com>
2956 konobi: Scott McWhirter <konobi@cpan.org>
2958 marcus: Marcus Ramberg <mramberg@cpan.org>
2960 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
2962 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
2966 naughton: David Naughton
2968 ningu: David Kamholz <dkamholz@cpan.org>
2970 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
2972 numa: Dan Sully <daniel@cpan.org>
2978 omega: Andreas Marienborg
2980 Oleg Kostyuk <cub.uanic@gmail.com>
2982 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
2984 rafl: Florian Ragwitz <rafl@debian.org>
2986 random: Roland Lammel <lammel@cpan.org>
2988 Robert Sedlacek C<< <rs@474.at> >>
2992 t0m: Tomas Doran <bobtfish@bobtfish.net>
2996 Viljo Marrandi C<vilts@yahoo.com>
2998 Will Hawes C<info@whawes.co.uk>
3000 willert: Sebastian Willert <willert@cpan.org>
3002 Yuval Kogman, C<nothingmuch@woobling.org>
3006 This library is free software. You can redistribute it and/or modify it under
3007 the same terms as Perl itself.
3013 __PACKAGE__->meta->make_immutable;