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 ();
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/;
31 use String::RewritePrefix;
32 use Catalyst::EngineLoader;
34 use Carp qw/croak carp shortmess/;
36 use Plack::Middleware::Conditional;
37 use Plack::Middleware::ReverseProxy;
38 use Plack::Middleware::IIS6ScriptNameFix;
39 use Plack::Middleware::LighttpdScriptNameFix;
41 BEGIN { require 5.008004; }
43 has stack => (is => 'ro', default => sub { [] });
44 has stash => (is => 'rw', default => sub { {} });
45 has state => (is => 'rw', default => 0);
46 has stats => (is => 'rw');
47 has action => (is => 'rw');
48 has counter => (is => 'rw', default => sub { {} });
49 has request => (is => 'rw', default => sub { $_[0]->request_class->new({}) }, required => 1, lazy => 1);
50 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
51 has namespace => (is => 'rw');
53 sub depth { scalar @{ shift->stack || [] }; }
54 sub comp { shift->component(@_) }
57 my $self = shift; return $self->request(@_);
60 my $self = shift; return $self->response(@_);
63 # For backwards compatibility
64 sub finalize_output { shift->finalize_body(@_) };
69 our $RECURSION = 1000;
70 our $DETACH = Catalyst::Exception::Detach->new;
71 our $GO = Catalyst::Exception::Go->new;
73 #I imagine that very few of these really need to be class variables. if any.
74 #maybe we should just make them attributes with a default?
75 __PACKAGE__->mk_classdata($_)
76 for qw/components arguments dispatcher engine log dispatcher_class
77 engine_loader context_class request_class response_class stats_class
78 setup_finished _psgi_app loading_psgi_file/;
80 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
81 __PACKAGE__->request_class('Catalyst::Request');
82 __PACKAGE__->response_class('Catalyst::Response');
83 __PACKAGE__->stats_class('Catalyst::Stats');
85 # Remember to update this in Catalyst::Runtime as well!
87 our $VERSION = '5.89003';
90 my ( $class, @arguments ) = @_;
92 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
94 return unless $class eq 'Catalyst';
96 my $caller = caller();
97 return if $caller eq 'main';
99 my $meta = Moose::Meta::Class->initialize($caller);
100 unless ( $caller->isa('Catalyst') ) {
101 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Controller');
102 $meta->superclasses(@superclasses);
104 # Avoid possible C3 issues if 'Moose::Object' is already on RHS of MyApp
105 $meta->superclasses(grep { $_ ne 'Moose::Object' } $meta->superclasses);
107 unless( $meta->has_method('meta') ){
108 if ($Moose::VERSION >= 1.15) {
109 $meta->_add_meta_method('meta');
112 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
116 $caller->arguments( [@arguments] );
120 sub _application { $_[0] }
124 Catalyst - The Elegant MVC Web Application Framework
128 See the L<Catalyst::Manual> distribution for comprehensive
129 documentation and tutorials.
131 # Install Catalyst::Devel for helpers and other development tools
132 # use the helper to create a new application
135 # add models, views, controllers
136 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
137 script/myapp_create.pl view MyTemplate TT
138 script/myapp_create.pl controller Search
140 # built in testserver -- use -r to restart automatically on changes
141 # --help to see all available options
142 script/myapp_server.pl
144 # command line testing interface
145 script/myapp_test.pl /yada
148 use Catalyst qw/-Debug/; # include plugins here as well
150 ### In lib/MyApp/Controller/Root.pm (autocreated)
151 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
152 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
153 $c->stash->{template} = 'foo.tt'; # set the template
154 # lookup something from db -- stash vars are passed to TT
156 $c->model('Database::Foo')->search( { country => $args[0] } );
157 if ( $c->req->params->{bar} ) { # access GET or POST parameters
158 $c->forward( 'bar' ); # process another action
159 # do something else after forward returns
163 # The foo.tt TT template can use the stash data from the database
164 [% WHILE (item = data.next) %]
168 # called for /bar/of/soap, /bar/of/soap/10, etc.
169 sub bar : Path('/bar/of/soap') { ... }
171 # called for all actions, from the top-most controller downwards
173 my ( $self, $c ) = @_;
174 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
175 $c->res->redirect( '/login' ); # require login
176 return 0; # abort request and go immediately to end()
178 return 1; # success; carry on to next action
181 # called after all actions are finished
183 my ( $self, $c ) = @_;
184 if ( scalar @{ $c->error } ) { ... } # handle errors
185 return if $c->res->body; # already have a response
186 $c->forward( 'MyApp::View::TT' ); # render template
189 ### in MyApp/Controller/Foo.pm
190 # called for /foo/bar
191 sub bar : Local { ... }
193 # called for /blargle
194 sub blargle : Global { ... }
196 # an index action matches /foo, but not /foo/1, etc.
197 sub index : Private { ... }
199 ### in MyApp/Controller/Foo/Bar.pm
200 # called for /foo/bar/baz
201 sub baz : Local { ... }
203 # first Root auto is called, then Foo auto, then this
204 sub auto : Private { ... }
206 # powerful regular expression paths are also possible
207 sub details : Regex('^product/(\w+)/details$') {
208 my ( $self, $c ) = @_;
209 # extract the (\w+) from the URI
210 my $product = $c->req->captures->[0];
213 See L<Catalyst::Manual::Intro> for additional information.
217 Catalyst is a modern framework for making web applications without the
218 pain usually associated with this process. This document is a reference
219 to the main Catalyst application. If you are a new user, we suggest you
220 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
222 See L<Catalyst::Manual> for more documentation.
224 Catalyst plugins can be loaded by naming them as arguments to the "use
225 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
226 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
229 use Catalyst qw/My::Module/;
231 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
232 fully qualify the name by using a unary plus:
236 +Fully::Qualified::Plugin::Name
239 Special flags like C<-Debug> and C<-Engine> can also be specified as
240 arguments when Catalyst is loaded:
242 use Catalyst qw/-Debug My::Module/;
244 The position of plugins and flags in the chain is important, because
245 they are loaded in the order in which they appear.
247 The following flags are supported:
251 Enables debug output. You can also force this setting from the system
252 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
253 settings override the application, with <MYAPP>_DEBUG having the highest
256 This sets the log level to 'debug' and enables full debug output on the
257 error screen. If you only want the latter, see L<< $c->debug >>.
261 Forces Catalyst to use a specific engine. Omit the
262 C<Catalyst::Engine::> prefix of the engine name, i.e.:
264 use Catalyst qw/-Engine=CGI/;
268 Forces Catalyst to use a specific home directory, e.g.:
270 use Catalyst qw[-Home=/usr/mst];
272 This can also be done in the shell environment by setting either the
273 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
274 is replaced with the uppercased name of your application, any "::" in
275 the name will be replaced with underscores, e.g. MyApp::Web should use
276 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
278 If none of these are set, Catalyst will attempt to automatically detect the
279 home directory. If you are working in a development environment, Catalyst
280 will try and find the directory containing either Makefile.PL, Build.PL or
281 dist.ini. If the application has been installed into the system (i.e.
282 you have done C<make install>), then Catalyst will use the path to your
283 application module, without the .pm extension (e.g., /foo/MyApp if your
284 application was installed at /foo/MyApp.pm)
288 use Catalyst '-Log=warn,fatal,error';
290 Specifies a comma-delimited list of log levels.
294 Enables statistics collection and reporting.
296 use Catalyst qw/-Stats=1/;
298 You can also force this setting from the system environment with CATALYST_STATS
299 or <MYAPP>_STATS. The environment settings override the application, with
300 <MYAPP>_STATS having the highest priority.
302 Stats are also enabled if L<< debugging |/"-Debug" >> is enabled.
306 =head2 INFORMATION ABOUT THE CURRENT REQUEST
310 Returns a L<Catalyst::Action> object for the current action, which
311 stringifies to the action name. See L<Catalyst::Action>.
315 Returns the namespace of the current action, i.e., the URI prefix
316 corresponding to the controller of the current action. For example:
318 # in Controller::Foo::Bar
319 $c->namespace; # returns 'foo/bar';
325 Returns the current L<Catalyst::Request> object, giving access to
326 information about the current client request (including parameters,
327 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
329 =head2 REQUEST FLOW HANDLING
331 =head2 $c->forward( $action [, \@arguments ] )
333 =head2 $c->forward( $class, $method, [, \@arguments ] )
335 Forwards processing to another action, by its private name. If you give a
336 class name but no method, C<process()> is called. You may also optionally
337 pass arguments in an arrayref. The action will receive the arguments in
338 C<@_> and C<< $c->req->args >>. Upon returning from the function,
339 C<< $c->req->args >> will be restored to the previous values.
341 Any data C<return>ed from the action forwarded to, will be returned by the
344 my $foodata = $c->forward('/foo');
345 $c->forward('index');
346 $c->forward(qw/Model::DBIC::Foo do_stuff/);
347 $c->forward('View::TT');
349 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
350 an C<< eval { } >> around the call (actually
351 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus rendering all
352 exceptions thrown by the called action non-fatal and pushing them onto
353 $c->error instead. If you want C<die> to propagate you need to do something
357 die join "\n", @{ $c->error } if @{ $c->error };
359 Or make sure to always return true values from your actions and write
362 $c->forward('foo') || return;
364 Another note is that C<< $c->forward >> always returns a scalar because it
365 actually returns $c->state which operates in a scalar context.
366 Thus, something like:
370 in an action that is forwarded to is going to return a scalar,
371 i.e. how many items are in that array, which is probably not what you want.
372 If you need to return an array then return a reference to it,
375 $c->stash->{array} = \@array;
377 and access it from the stash.
379 Keep in mind that the C<end> method used is that of the caller action. So a C<$c-E<gt>detach> inside a forwarded action would run the C<end> method from the original action requested.
383 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
385 =head2 $c->detach( $action [, \@arguments ] )
387 =head2 $c->detach( $class, $method, [, \@arguments ] )
391 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
392 doesn't return to the previous action when processing is finished.
394 When called with no arguments it escapes the processing chain entirely.
398 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
400 =head2 $c->visit( $action [, \@captures, \@arguments ] )
402 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
404 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
405 but does a full dispatch, instead of just calling the new C<$action> /
406 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
407 you go to are called, just like a new request.
409 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
410 This means, for example, that C<< $c->action >> methods such as
411 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
412 L<reverse|Catalyst::Action/reverse> return information for the visited action
413 when they are invoked within the visited action. This is different from the
414 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
415 continues to use the $c->action object from the caller action even when
416 invoked from the called action.
418 C<< $c->stash >> is kept unchanged.
420 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
421 allows you to "wrap" another action, just as it would have been called by
422 dispatching from a URL, while the analogous
423 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
424 transfer control to another action as if it had been reached directly from a URL.
428 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
430 =head2 $c->go( $action [, \@captures, \@arguments ] )
432 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
434 The relationship between C<go> and
435 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
436 the relationship between
437 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
438 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
439 C<< $c->go >> will perform a full dispatch on the specified action or method,
440 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
441 C<go> escapes the processing of the current request chain on completion, and
442 does not return to its caller.
444 @arguments are arguments to the final destination of $action. @captures are
445 arguments to the intermediate steps, if any, on the way to the final sub of
450 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
456 Returns the current L<Catalyst::Response> object, see there for details.
460 Returns a hashref to the stash, which may be used to store data and pass
461 it between components during a request. You can also set hash keys by
462 passing arguments. The stash is automatically sent to the view. The
463 stash is cleared at the end of a request; it cannot be used for
464 persistent storage (for this you must use a session; see
465 L<Catalyst::Plugin::Session> for a complete system integrated with
468 $c->stash->{foo} = $bar;
469 $c->stash( { moose => 'majestic', qux => 0 } );
470 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
472 # stash is automatically passed to the view for use in a template
473 $c->forward( 'MyApp::View::TT' );
477 around stash => sub {
480 my $stash = $orig->($c);
482 my $new_stash = @_ > 1 ? {@_} : $_[0];
483 croak('stash takes a hash or hashref') unless ref $new_stash;
484 foreach my $key ( keys %$new_stash ) {
485 $stash->{$key} = $new_stash->{$key};
495 =head2 $c->error($error, ...)
497 =head2 $c->error($arrayref)
499 Returns an arrayref containing error messages. If Catalyst encounters an
500 error while processing a request, it stores the error in $c->error. This
501 method should only be used to store fatal error messages.
503 my @error = @{ $c->error };
507 $c->error('Something bad happened');
514 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
515 croak @$error unless ref $c;
516 push @{ $c->{error} }, @$error;
518 elsif ( defined $_[0] ) { $c->{error} = undef }
519 return $c->{error} || [];
525 Contains the return value of the last executed action.
526 Note that << $c->state >> operates in a scalar context which means that all
527 values it returns are scalar.
529 =head2 $c->clear_errors
531 Clear errors. You probably don't want to clear the errors unless you are
532 implementing a custom error screen.
534 This is equivalent to running
545 sub _comp_search_prefixes {
547 return map $c->components->{ $_ }, $c->_comp_names_search_prefixes(@_);
550 # search components given a name and some prefixes
551 sub _comp_names_search_prefixes {
552 my ( $c, $name, @prefixes ) = @_;
553 my $appclass = ref $c || $c;
554 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
555 $filter = qr/$filter/; # Compile regex now rather than once per loop
557 # map the original component name to the sub part that we will search against
558 my %eligible = map { my $n = $_; $n =~ s{^$appclass\::[^:]+::}{}; $_ => $n; }
559 grep { /$filter/ } keys %{ $c->components };
561 # undef for a name will return all
562 return keys %eligible if !defined $name;
564 my $query = ref $name ? $name : qr/^$name$/i;
565 my @result = grep { $eligible{$_} =~ m{$query} } keys %eligible;
567 return @result if @result;
569 # if we were given a regexp to search against, we're done.
572 # skip regexp fallback if configured
574 if $appclass->config->{disable_component_resolution_regex_fallback};
578 @result = grep { $eligible{ $_ } =~ m{$query} } keys %eligible;
580 # no results? try against full names
582 @result = grep { m{$query} } keys %eligible;
585 # don't warn if we didn't find any results, it just might not exist
587 # Disgusting hack to work out correct method name
588 my $warn_for = lc $prefixes[0];
589 my $msg = "Used regexp fallback for \$c->${warn_for}('${name}'), which found '" .
590 (join '", "', @result) . "'. Relying on regexp fallback behavior for " .
591 "component resolution is unreliable and unsafe.";
592 my $short = $result[0];
593 # remove the component namespace prefix
594 $short =~ s/.*?(Model|Controller|View):://;
595 my $shortmess = Carp::shortmess('');
596 if ($shortmess =~ m#Catalyst/Plugin#) {
597 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
599 } elsif ($shortmess =~ m#Catalyst/lib/(View|Controller)#) {
600 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
601 "component's config";
603 $msg .= " You probably meant \$c->${warn_for}('$short') instead of \$c->${warn_for}('${name}'), " .
604 "but if you really wanted to search, pass in a regexp as the argument " .
605 "like so: \$c->${warn_for}(qr/${name}/)";
607 $c->log->warn( "${msg}$shortmess" );
613 # Find possible names for a prefix
615 my ( $c, @prefixes ) = @_;
616 my $appclass = ref $c || $c;
618 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
620 my @names = map { s{$filter}{}; $_; }
621 $c->_comp_names_search_prefixes( undef, @prefixes );
626 # Filter a component before returning by calling ACCEPT_CONTEXT if available
627 sub _filter_component {
628 my ( $c, $comp, @args ) = @_;
630 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
631 return $comp->ACCEPT_CONTEXT( $c, @args );
637 =head2 COMPONENT ACCESSORS
639 =head2 $c->controller($name)
641 Gets a L<Catalyst::Controller> instance by name.
643 $c->controller('Foo')->do_stuff;
645 If the name is omitted, will return the controller for the dispatched
648 If you want to search for controllers, pass in a regexp as the argument.
650 # find all controllers that start with Foo
651 my @foo_controllers = $c->controller(qr{^Foo});
657 my ( $c, $name, @args ) = @_;
659 my $appclass = ref($c) || $c;
661 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
662 my $comps = $c->components;
663 my $check = $appclass."::Controller::".$name;
664 return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check};
666 my @result = $c->_comp_search_prefixes( $name, qw/Controller C/ );
667 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
668 return $c->_filter_component( $result[ 0 ], @args );
671 return $c->component( $c->action->class );
674 =head2 $c->model($name)
676 Gets a L<Catalyst::Model> instance by name.
678 $c->model('Foo')->do_stuff;
680 Any extra arguments are directly passed to ACCEPT_CONTEXT.
682 If the name is omitted, it will look for
683 - a model object in $c->stash->{current_model_instance}, then
684 - a model name in $c->stash->{current_model}, then
685 - a config setting 'default_model', or
686 - check if there is only one model, and return it if that's the case.
688 If you want to search for models, pass in a regexp as the argument.
690 # find all models that start with Foo
691 my @foo_models = $c->model(qr{^Foo});
696 my ( $c, $name, @args ) = @_;
697 my $appclass = ref($c) || $c;
699 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
700 my $comps = $c->components;
701 my $check = $appclass."::Model::".$name;
702 return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check};
704 my @result = $c->_comp_search_prefixes( $name, qw/Model M/ );
705 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
706 return $c->_filter_component( $result[ 0 ], @args );
710 return $c->stash->{current_model_instance}
711 if $c->stash->{current_model_instance};
712 return $c->model( $c->stash->{current_model} )
713 if $c->stash->{current_model};
715 return $c->model( $appclass->config->{default_model} )
716 if $appclass->config->{default_model};
718 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/Model M/);
721 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
722 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
723 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
724 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
725 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
728 return $c->_filter_component( $comp );
732 =head2 $c->view($name)
734 Gets a L<Catalyst::View> instance by name.
736 $c->view('Foo')->do_stuff;
738 Any extra arguments are directly passed to ACCEPT_CONTEXT.
740 If the name is omitted, it will look for
741 - a view object in $c->stash->{current_view_instance}, then
742 - a view name in $c->stash->{current_view}, then
743 - a config setting 'default_view', or
744 - check if there is only one view, and return it if that's the case.
746 If you want to search for views, pass in a regexp as the argument.
748 # find all views that start with Foo
749 my @foo_views = $c->view(qr{^Foo});
754 my ( $c, $name, @args ) = @_;
756 my $appclass = ref($c) || $c;
758 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
759 my $comps = $c->components;
760 my $check = $appclass."::View::".$name;
761 if( exists $comps->{$check} ) {
762 return $c->_filter_component( $comps->{$check}, @args );
765 $c->log->warn( "Attempted to use view '$check', but does not exist" );
768 my @result = $c->_comp_search_prefixes( $name, qw/View V/ );
769 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
770 return $c->_filter_component( $result[ 0 ], @args );
774 return $c->stash->{current_view_instance}
775 if $c->stash->{current_view_instance};
776 return $c->view( $c->stash->{current_view} )
777 if $c->stash->{current_view};
779 return $c->view( $appclass->config->{default_view} )
780 if $appclass->config->{default_view};
782 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/View V/);
785 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
786 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
787 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
788 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
789 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
792 return $c->_filter_component( $comp );
795 =head2 $c->controllers
797 Returns the available names which can be passed to $c->controller
803 return $c->_comp_names(qw/Controller C/);
808 Returns the available names which can be passed to $c->model
814 return $c->_comp_names(qw/Model M/);
820 Returns the available names which can be passed to $c->view
826 return $c->_comp_names(qw/View V/);
829 =head2 $c->comp($name)
831 =head2 $c->component($name)
833 Gets a component object by name. This method is not recommended,
834 unless you want to get a specific component by full
835 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
836 should be used instead.
838 If C<$name> is a regexp, a list of components matched against the full
839 component name will be returned.
841 If Catalyst can't find a component by name, it will fallback to regex
842 matching by default. To disable this behaviour set
843 disable_component_resolution_regex_fallback to a true value.
845 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
850 my ( $c, $name, @args ) = @_;
853 my $comps = $c->components;
856 # is it the exact name?
857 return $c->_filter_component( $comps->{ $name }, @args )
858 if exists $comps->{ $name };
860 # perhaps we just omitted "MyApp"?
861 my $composed = ( ref $c || $c ) . "::${name}";
862 return $c->_filter_component( $comps->{ $composed }, @args )
863 if exists $comps->{ $composed };
865 # search all of the models, views and controllers
866 my( $comp ) = $c->_comp_search_prefixes( $name, qw/Model M Controller C View V/ );
867 return $c->_filter_component( $comp, @args ) if $comp;
871 if $c->config->{disable_component_resolution_regex_fallback};
873 # This is here so $c->comp( '::M::' ) works
874 my $query = ref $name ? $name : qr{$name}i;
876 my @result = grep { m{$query} } keys %{ $c->components };
877 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
880 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
881 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
882 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
883 return $c->_filter_component( $result[ 0 ], @args );
886 # I would expect to return an empty list here, but that breaks back-compat
890 return sort keys %{ $c->components };
893 =head2 CLASS DATA AND HELPER CLASSES
897 Returns or takes a hashref containing the application's configuration.
899 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
901 You can also use a C<YAML>, C<XML> or L<Config::General> config file
902 like C<myapp.conf> in your applications home directory. See
903 L<Catalyst::Plugin::ConfigLoader>.
905 =head3 Cascading configuration
907 The config method is present on all Catalyst components, and configuration
908 will be merged when an application is started. Configuration loaded with
909 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
910 followed by configuration in your top level C<MyApp> class. These two
911 configurations are merged, and then configuration data whose hash key matches a
912 component name is merged with configuration for that component.
914 The configuration for a component is then passed to the C<new> method when a
915 component is constructed.
919 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
920 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
922 will mean that C<MyApp::Model::Foo> receives the following data when
925 MyApp::Model::Foo->new({
931 It's common practice to use a Moose attribute
932 on the receiving component to access the config value.
934 package MyApp::Model::Foo;
938 # this attr will receive 'baz' at construction time
944 You can then get the value 'baz' by calling $c->model('Foo')->bar
945 (or $self->bar inside code in the model).
947 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
948 as a way of reading config within your code, as this B<will not> give you the
949 correctly merged config back. You B<MUST> take the config values supplied to
950 the constructor and use those instead.
954 around config => sub {
958 croak('Setting config after setup has been run is not allowed.')
959 if ( @_ and $c->setup_finished );
966 Returns the logging object instance. Unless it is already set, Catalyst
967 sets this up with a L<Catalyst::Log> object. To use your own log class,
968 set the logger with the C<< __PACKAGE__->log >> method prior to calling
969 C<< __PACKAGE__->setup >>.
971 __PACKAGE__->log( MyLogger->new );
976 $c->log->info( 'Now logging with my own logger!' );
978 Your log class should implement the methods described in
984 Returns 1 if debug mode is enabled, 0 otherwise.
986 You can enable debug mode in several ways:
990 =item By calling myapp_server.pl with the -d flag
992 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
994 =item The -Debug option in your MyApp.pm
996 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
1000 The first three also set the log level to 'debug'.
1002 Calling C<< $c->debug(1) >> has no effect.
1008 =head2 $c->dispatcher
1010 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
1014 Returns the engine instance. See L<Catalyst::Engine>.
1017 =head2 UTILITY METHODS
1019 =head2 $c->path_to(@path)
1021 Merges C<@path> with C<< $c->config->{home} >> and returns a
1022 L<Path::Class::Dir> object. Note you can usually use this object as
1023 a filename, but sometimes you will have to explicitly stringify it
1024 yourself by calling the C<< ->stringify >> method.
1028 $c->path_to( 'db', 'sqlite.db' );
1033 my ( $c, @path ) = @_;
1034 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
1035 if ( -d $path ) { return $path }
1036 else { return Path::Class::File->new( $c->config->{home}, @path ) }
1039 =head2 $c->plugin( $name, $class, @args )
1041 Helper method for plugins. It creates a class data accessor/mutator and
1042 loads and instantiates the given class.
1044 MyApp->plugin( 'prototype', 'HTML::Prototype' );
1046 $c->prototype->define_javascript_functions;
1048 B<Note:> This method of adding plugins is deprecated. The ability
1049 to add plugins like this B<will be removed> in a Catalyst 5.81.
1050 Please do not use this functionality in new code.
1055 my ( $class, $name, $plugin, @args ) = @_;
1057 # See block comment in t/unit_core_plugin.t
1058 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
1060 $class->_register_plugin( $plugin, 1 );
1062 eval { $plugin->import };
1063 $class->mk_classdata($name);
1065 eval { $obj = $plugin->new(@args) };
1068 Catalyst::Exception->throw( message =>
1069 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1072 $class->$name($obj);
1073 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1079 Initializes the dispatcher and engine, loads any plugins, and loads the
1080 model, view, and controller components. You may also specify an array
1081 of plugins to load here, if you choose to not load them in the C<use
1085 MyApp->setup( qw/-Debug/ );
1090 my ( $class, @arguments ) = @_;
1091 croak('Running setup more than once')
1092 if ( $class->setup_finished );
1094 unless ( $class->isa('Catalyst') ) {
1096 Catalyst::Exception->throw(
1097 message => qq/'$class' does not inherit from Catalyst/ );
1100 if ( $class->arguments ) {
1101 @arguments = ( @arguments, @{ $class->arguments } );
1107 foreach (@arguments) {
1111 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1113 elsif (/^-(\w+)=?(.*)$/) {
1114 $flags->{ lc $1 } = $2;
1117 push @{ $flags->{plugins} }, $_;
1121 $class->setup_home( delete $flags->{home} );
1123 $class->setup_log( delete $flags->{log} );
1124 $class->setup_plugins( delete $flags->{plugins} );
1125 $class->setup_dispatcher( delete $flags->{dispatcher} );
1126 if (my $engine = delete $flags->{engine}) {
1127 $class->log->warn("Specifying the engine in ->setup is no longer supported, see Catalyst::Upgrading");
1129 $class->setup_engine();
1130 $class->setup_stats( delete $flags->{stats} );
1132 for my $flag ( sort keys %{$flags} ) {
1134 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1135 &$code( $class, delete $flags->{$flag} );
1138 $class->log->warn(qq/Unknown flag "$flag"/);
1142 eval { require Catalyst::Devel; };
1143 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1144 $class->log->warn(<<"EOF");
1145 You are running an old script!
1147 Please update by running (this will overwrite existing files):
1148 catalyst.pl -force -scripts $class
1150 or (this will not overwrite existing files):
1151 catalyst.pl -scripts $class
1156 if ( $class->debug ) {
1157 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1160 my $column_width = Catalyst::Utils::term_width() - 6;
1161 my $t = Text::SimpleTable->new($column_width);
1162 $t->row($_) for @plugins;
1163 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1166 my $dispatcher = $class->dispatcher;
1167 my $engine = $class->engine;
1168 my $home = $class->config->{home};
1170 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1171 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1175 ? $class->log->debug(qq/Found home "$home"/)
1176 : $class->log->debug(qq/Home "$home" doesn't exist/)
1177 : $class->log->debug(q/Couldn't find home/);
1180 # Call plugins setup, this is stupid and evil.
1181 # Also screws C3 badly on 5.10, hack to avoid.
1183 no warnings qw/redefine/;
1184 local *setup = sub { };
1185 $class->setup unless $Catalyst::__AM_RESTARTING;
1188 # Initialize our data structure
1189 $class->components( {} );
1191 $class->setup_components;
1193 if ( $class->debug ) {
1194 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1195 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1196 for my $comp ( sort keys %{ $class->components } ) {
1197 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1198 $t->row( $comp, $type );
1200 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1201 if ( keys %{ $class->components } );
1204 # Add our self to components, since we are also a component
1205 if( $class->isa('Catalyst::Controller') ){
1206 $class->components->{$class} = $class;
1209 $class->setup_actions;
1211 if ( $class->debug ) {
1212 my $name = $class->config->{name} || 'Application';
1213 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1216 # Make sure that the application class becomes immutable at this point,
1217 B::Hooks::EndOfScope::on_scope_end {
1219 my $meta = Class::MOP::get_metaclass_by_name($class);
1222 && ! { $meta->immutable_options }->{replace_constructor}
1224 $class->isa('Class::Accessor::Fast')
1225 || $class->isa('Class::Accessor')
1228 warn "You made your application class ($class) immutable, "
1229 . "but did not inline the\nconstructor. "
1230 . "This will break catalyst, as your app \@ISA "
1231 . "Class::Accessor(::Fast)?\nPlease pass "
1232 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1234 $meta->make_immutable(
1235 replace_constructor => 1,
1236 ) unless $meta->is_immutable;
1239 if ($class->config->{case_sensitive}) {
1240 $class->log->warn($class . "->config->{case_sensitive} is set.");
1241 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1244 $class->setup_finalize;
1245 # Should be the last thing we do so that user things hooking
1246 # setup_finalize can log..
1247 $class->log->_flush() if $class->log->can('_flush');
1248 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1251 =head2 $app->setup_finalize
1253 A hook to attach modifiers to. This method does not do anything except set the
1254 C<setup_finished> accessor.
1256 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1260 after setup_finalize => sub {
1268 sub setup_finalize {
1270 $class->setup_finished(1);
1273 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1275 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1277 Constructs an absolute L<URI> object based on the application root, the
1278 provided path, and the additional arguments and query parameters provided.
1279 When used as a string, provides a textual URI. If you need more flexibility
1280 than this (i.e. the option to provide relative URIs etc.) see
1281 L<Catalyst::Plugin::SmartURI>.
1283 If no arguments are provided, the URI for the current action is returned.
1284 To return the current action and also provide @args, use
1285 C<< $c->uri_for( $c->action, @args ) >>.
1287 If the first argument is a string, it is taken as a public URI path relative
1288 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1289 relative to the application root (if it does). It is then merged with
1290 C<< $c->request->base >>; any C<@args> are appended as additional path
1291 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1293 If the first argument is a L<Catalyst::Action> it represents an action which
1294 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1295 optional C<\@captures> argument (an arrayref) allows passing the captured
1296 variables that are needed to fill in the paths of Chained and Regex actions;
1297 once the path is resolved, C<uri_for> continues as though a path was
1298 provided, appending any arguments or parameters and creating an absolute
1301 The captures for the current request can be found in
1302 C<< $c->request->captures >>, and actions can be resolved using
1303 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1304 path, use C<< $c->uri_for_action >> instead.
1306 # Equivalent to $c->req->uri
1307 $c->uri_for($c->action, $c->req->captures,
1308 @{ $c->req->args }, $c->req->params);
1310 # For the Foo action in the Bar controller
1311 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1313 # Path to a static resource
1314 $c->uri_for('/static/images/logo.png');
1319 my ( $c, $path, @args ) = @_;
1321 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1322 $path = $path->path_prefix;
1327 undef($path) if (defined $path && $path eq '');
1330 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1332 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1333 foreach my $arg (@args) {
1334 utf8::encode($arg) if utf8::is_utf8($arg);
1335 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1338 if ( blessed($path) ) { # action object
1339 s|/|%2F|g for @args;
1340 my $captures = [ map { s|/|%2F|g; $_; }
1341 ( scalar @args && ref $args[0] eq 'ARRAY'
1345 foreach my $capture (@$captures) {
1346 utf8::encode($capture) if utf8::is_utf8($capture);
1347 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1351 $path = $c->dispatcher->uri_for_action($action, $captures);
1352 if (not defined $path) {
1353 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1357 $path = '/' if $path eq '';
1360 unshift(@args, $path);
1362 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1363 my $namespace = $c->namespace;
1364 if (defined $path) { # cheesy hack to handle path '../foo'
1365 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1367 unshift(@args, $namespace || '');
1370 # join args with '/', or a blank string
1371 my $args = join('/', grep { defined($_) } @args);
1372 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1374 my $base = $c->req->base;
1375 my $class = ref($base);
1376 $base =~ s{(?<!/)$}{/};
1380 if (my @keys = keys %$params) {
1381 # somewhat lifted from URI::_query's query_form
1382 $query = '?'.join('&', map {
1383 my $val = $params->{$_};
1384 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1387 $val = '' unless defined $val;
1390 utf8::encode( $param ) if utf8::is_utf8($param);
1391 # using the URI::Escape pattern here so utf8 chars survive
1392 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1394 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1398 my $res = bless(\"${base}${args}${query}", $class);
1402 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1404 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1410 A private path to the Catalyst action you want to create a URI for.
1412 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1413 >> and passing the resulting C<$action> and the remaining arguments to C<<
1416 You can also pass in a Catalyst::Action object, in which case it is passed to
1419 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.
1421 For example, if the action looks like:
1423 package MyApp::Controller::Users;
1425 sub lst : Path('the-list') {}
1429 $c->uri_for_action('/users/lst')
1431 and it will create the URI /users/the-list.
1437 sub uri_for_action {
1438 my ( $c, $path, @args ) = @_;
1439 my $action = blessed($path)
1441 : $c->dispatcher->get_action_by_path($path);
1442 unless (defined $action) {
1443 croak "Can't find action for path '$path'";
1445 return $c->uri_for( $action, @args );
1448 =head2 $c->welcome_message
1450 Returns the Catalyst welcome HTML page.
1454 sub welcome_message {
1456 my $name = $c->config->{name};
1457 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1458 my $prefix = Catalyst::Utils::appprefix( ref $c );
1459 $c->response->content_type('text/html; charset=utf-8');
1461 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1462 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1463 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1465 <meta http-equiv="Content-Language" content="en" />
1466 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1467 <title>$name on Catalyst $VERSION</title>
1468 <style type="text/css">
1471 background-color: #eee;
1478 margin-bottom: 10px;
1480 background-color: #ccc;
1481 border: 1px solid #aaa;
1486 font-family: verdana, tahoma, sans-serif;
1489 font-family: verdana, tahoma, sans-serif;
1492 text-decoration: none;
1494 border-bottom: 1px dotted #bbb;
1496 :link:hover, :visited:hover {
1509 background-color: #fff;
1510 border: 1px solid #aaa;
1514 font-weight: normal;
1536 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1541 <img src="$logo" alt="Catalyst Logo" />
1543 <p>Welcome to the world of Catalyst.
1544 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1545 framework will make web development something you had
1546 never expected it to be: Fun, rewarding, and quick.</p>
1547 <h2>What to do now?</h2>
1548 <p>That really depends on what <b>you</b> want to do.
1549 We do, however, provide you with a few starting points.</p>
1550 <p>If you want to jump right into web development with Catalyst
1551 you might want to start with a tutorial.</p>
1552 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1554 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1556 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1557 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1559 <h2>What to do next?</h2>
1560 <p>Next it's time to write an actual application. Use the
1561 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1562 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1563 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1564 they can save you a lot of work.</p>
1565 <pre><code>script/${prefix}_create.pl --help</code></pre>
1566 <p>Also, be sure to check out the vast and growing
1567 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1568 you are likely to find what you need there.
1572 <p>Catalyst has a very active community. Here are the main places to
1573 get in touch with us.</p>
1576 <a href="http://dev.catalyst.perl.org">Wiki</a>
1579 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1582 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1585 <h2>In conclusion</h2>
1586 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1587 as we enjoyed making it. Please contact us if you have ideas
1588 for improvement or other feedback.</p>
1596 =head1 INTERNAL METHODS
1598 These methods are not meant to be used by end users.
1600 =head2 $c->components
1602 Returns a hash of components.
1604 =head2 $c->context_class
1606 Returns or sets the context class.
1610 Returns a hashref containing coderefs and execution counts (needed for
1611 deep recursion detection).
1615 Returns the number of actions on the current internal execution stack.
1619 Dispatches a request to actions.
1623 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1625 =head2 $c->dispatcher_class
1627 Returns or sets the dispatcher class.
1629 =head2 $c->dump_these
1631 Returns a list of 2-element array references (name, structure) pairs
1632 that will be dumped on the error page in debug mode.
1638 [ Request => $c->req ],
1639 [ Response => $c->res ],
1640 [ Stash => $c->stash ],
1641 [ Config => $c->config ];
1644 =head2 $c->engine_class
1646 Returns or sets the engine class.
1648 =head2 $c->execute( $class, $coderef )
1650 Execute a coderef in given class and catch exceptions. Errors are available
1656 my ( $c, $class, $code ) = @_;
1657 $class = $c->component($class) || $class;
1660 if ( $c->depth >= $RECURSION ) {
1661 my $action = $code->reverse();
1662 $action = "/$action" unless $action =~ /->/;
1663 my $error = qq/Deep recursion detected calling "${action}"/;
1664 $c->log->error($error);
1670 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1672 push( @{ $c->stack }, $code );
1674 no warnings 'recursion';
1675 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1676 # I have no idea how, ergo $ret (which appears to fix the issue)
1677 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1679 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1681 my $last = pop( @{ $c->stack } );
1683 if ( my $error = $@ ) {
1684 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1685 $error->rethrow if $c->depth > 1;
1687 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1688 $error->rethrow if $c->depth > 0;
1691 unless ( ref $error ) {
1692 no warnings 'uninitialized';
1694 my $class = $last->class;
1695 my $name = $last->name;
1696 $error = qq/Caught exception in $class->$name "$error"/;
1705 sub _stats_start_execute {
1706 my ( $c, $code ) = @_;
1707 my $appclass = ref($c) || $c;
1708 return if ( ( $code->name =~ /^_.*/ )
1709 && ( !$appclass->config->{show_internal_actions} ) );
1711 my $action_name = $code->reverse();
1712 $c->counter->{$action_name}++;
1714 my $action = $action_name;
1715 $action = "/$action" unless $action =~ /->/;
1717 # determine if the call was the result of a forward
1718 # this is done by walking up the call stack and looking for a calling
1719 # sub of Catalyst::forward before the eval
1721 for my $index ( 2 .. 11 ) {
1723 if ( ( caller($index) )[0] eq 'Catalyst'
1724 && ( caller($index) )[3] eq '(eval)' );
1726 if ( ( caller($index) )[3] =~ /forward$/ ) {
1727 $callsub = ( caller($index) )[3];
1728 $action = "-> $action";
1733 my $uid = $action_name . $c->counter->{$action_name};
1735 # is this a root-level call or a forwarded call?
1736 if ( $callsub =~ /forward$/ ) {
1737 my $parent = $c->stack->[-1];
1739 # forward, locate the caller
1740 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1743 parent => "$parent" . $c->counter->{"$parent"},
1749 # forward with no caller may come from a plugin
1768 sub _stats_finish_execute {
1769 my ( $c, $info ) = @_;
1770 $c->stats->profile( end => $info );
1775 Finalizes the request.
1782 for my $error ( @{ $c->error } ) {
1783 $c->log->error($error);
1786 # Allow engine to handle finalize flow (for POE)
1787 my $engine = $c->engine;
1788 if ( my $code = $engine->can('finalize') ) {
1793 $c->finalize_uploads;
1796 if ( $#{ $c->error } >= 0 ) {
1800 $c->finalize_headers;
1803 if ( $c->request->method eq 'HEAD' ) {
1804 $c->response->body('');
1812 if ($c->use_stats) {
1813 my $elapsed = sprintf '%f', $c->stats->elapsed;
1814 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1816 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1819 return $c->response->status;
1822 =head2 $c->finalize_body
1828 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1830 =head2 $c->finalize_cookies
1836 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1838 =head2 $c->finalize_error
1844 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1846 =head2 $c->finalize_headers
1852 sub finalize_headers {
1855 my $response = $c->response; #accessor calls can add up?
1857 # Check if we already finalized headers
1858 return if $response->finalized_headers;
1861 if ( my $location = $response->redirect ) {
1862 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1863 $response->header( Location => $location );
1865 if ( !$response->has_body ) {
1866 # Add a default body if none is already present
1868 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1874 if ( defined $response->body && length $response->body && !$response->content_length ) {
1876 # get the length from a filehandle
1877 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1879 my $size = -s $response->body;
1881 $response->content_length( $size );
1884 $c->log->warn('Serving filehandle without a content-length');
1888 # everything should be bytes at this point, but just in case
1889 $response->content_length( length( $response->body ) );
1894 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1895 $response->headers->remove_header("Content-Length");
1896 $response->body('');
1899 $c->finalize_cookies;
1901 $c->engine->finalize_headers( $c, @_ );
1904 $response->finalized_headers(1);
1907 =head2 $c->finalize_output
1909 An alias for finalize_body.
1911 =head2 $c->finalize_read
1913 Finalizes the input after reading is complete.
1917 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1919 =head2 $c->finalize_uploads
1921 Finalizes uploads. Cleans up any temporary files.
1925 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1927 =head2 $c->get_action( $action, $namespace )
1929 Gets an action in a given namespace.
1933 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1935 =head2 $c->get_actions( $action, $namespace )
1937 Gets all actions of a given name in a namespace and all parent
1942 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1944 =head2 $app->handle_request( @arguments )
1946 Called to handle each HTTP request.
1950 sub handle_request {
1951 my ( $class, @arguments ) = @_;
1953 # Always expect worst case!
1956 if ($class->debug) {
1957 my $secs = time - $START || 1;
1958 my $av = sprintf '%.3f', $COUNT / $secs;
1959 my $time = localtime time;
1960 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1963 my $c = $class->prepare(@arguments);
1965 $status = $c->finalize;
1968 chomp(my $error = $_);
1969 $class->log->error(qq/Caught exception in engine "$error"/);
1974 if(my $coderef = $class->log->can('_flush')){
1975 $class->log->$coderef();
1980 =head2 $c->prepare( @arguments )
1982 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1988 my ( $class, @arguments ) = @_;
1991 # After the app/ctxt split, this should become an attribute based on something passed
1992 # into the application.
1993 $class->context_class( ref $class || $class ) unless $class->context_class;
1995 my $c = $class->context_class->new({});
1997 # For on-demand data
1998 $c->request->_context($c);
1999 $c->response->_context($c);
2001 #surely this is not the most efficient way to do things...
2002 $c->stats($class->stats_class->new)->enable($c->use_stats);
2003 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
2004 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
2008 # Allow engine to direct the prepare flow (for POE)
2009 if ( my $prepare = $c->engine->can('prepare') ) {
2010 $c->engine->$prepare( $c, @arguments );
2013 $c->prepare_request(@arguments);
2014 $c->prepare_connection;
2015 $c->prepare_query_parameters;
2016 $c->prepare_headers;
2017 $c->prepare_cookies;
2020 # Prepare the body for reading, either by prepare_body
2021 # or the user, if they are using $c->read
2024 # Parse the body unless the user wants it on-demand
2025 unless ( ref($c)->config->{parse_on_demand} ) {
2030 # VERY ugly and probably shouldn't rely on ->finalize actually working
2032 # failed prepare is always due to an invalid request, right?
2033 $c->response->status(400);
2034 $c->response->content_type('text/plain');
2035 $c->response->body('Bad Request');
2040 my $method = $c->req->method || '';
2041 my $path = $c->req->path;
2042 $path = '/' unless length $path;
2043 my $address = $c->req->address || '';
2052 =head2 $c->prepare_action
2054 Prepares action. See L<Catalyst::Dispatcher>.
2058 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
2060 =head2 $c->prepare_body
2062 Prepares message body.
2069 return if $c->request->_has_body;
2071 # Initialize on-demand data
2072 $c->engine->prepare_body( $c, @_ );
2073 $c->prepare_parameters;
2074 $c->prepare_uploads;
2077 =head2 $c->prepare_body_chunk( $chunk )
2079 Prepares a chunk of data before sending it to L<HTTP::Body>.
2081 See L<Catalyst::Engine>.
2085 sub prepare_body_chunk {
2087 $c->engine->prepare_body_chunk( $c, @_ );
2090 =head2 $c->prepare_body_parameters
2092 Prepares body parameters.
2096 sub prepare_body_parameters {
2098 $c->engine->prepare_body_parameters( $c, @_ );
2101 =head2 $c->prepare_connection
2103 Prepares connection.
2107 sub prepare_connection {
2109 $c->engine->prepare_connection( $c, @_ );
2112 =head2 $c->prepare_cookies
2118 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2120 =head2 $c->prepare_headers
2126 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2128 =head2 $c->prepare_parameters
2130 Prepares parameters.
2134 sub prepare_parameters {
2136 $c->prepare_body_parameters;
2137 $c->engine->prepare_parameters( $c, @_ );
2140 =head2 $c->prepare_path
2142 Prepares path and base.
2146 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2148 =head2 $c->prepare_query_parameters
2150 Prepares query parameters.
2154 sub prepare_query_parameters {
2157 $c->engine->prepare_query_parameters( $c, @_ );
2160 =head2 $c->log_request
2162 Writes information about the request to the debug logs. This includes:
2166 =item * Request method, path, and remote IP address
2168 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2170 =item * Request parameters
2172 =item * File uploads
2181 return unless $c->debug;
2183 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2184 my $request = $dump->[1];
2186 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2188 $path = '/' unless length $path;
2190 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2192 $c->log_request_headers($request->headers);
2194 if ( my $keywords = $request->query_keywords ) {
2195 $c->log->debug("Query keywords are: $keywords");
2198 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2200 $c->log_request_uploads($request);
2203 =head2 $c->log_response
2205 Writes information about the response to the debug logs by calling
2206 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2213 return unless $c->debug;
2215 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2216 my $response = $dump->[1];
2218 $c->log_response_status_line($response);
2219 $c->log_response_headers($response->headers);
2222 =head2 $c->log_response_status_line($response)
2224 Writes one line of information about the response to the debug logs. This includes:
2228 =item * Response status code
2230 =item * Content-Type header (if present)
2232 =item * Content-Length header (if present)
2238 sub log_response_status_line {
2239 my ($c, $response) = @_;
2243 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2244 $response->status || 'unknown',
2245 $response->headers->header('Content-Type') || 'unknown',
2246 $response->headers->header('Content-Length') || 'unknown'
2251 =head2 $c->log_response_headers($headers);
2253 Hook method which can be wrapped by plugins to log the response headers.
2254 No-op in the default implementation.
2258 sub log_response_headers {}
2260 =head2 $c->log_request_parameters( query => {}, body => {} )
2262 Logs request parameters to debug logs
2266 sub log_request_parameters {
2268 my %all_params = @_;
2270 return unless $c->debug;
2272 my $column_width = Catalyst::Utils::term_width() - 44;
2273 foreach my $type (qw(query body)) {
2274 my $params = $all_params{$type};
2275 next if ! keys %$params;
2276 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2277 for my $key ( sort keys %$params ) {
2278 my $param = $params->{$key};
2279 my $value = defined($param) ? $param : '';
2280 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2282 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2286 =head2 $c->log_request_uploads
2288 Logs file uploads included in the request to the debug logs.
2289 The parameter name, filename, file type, and file size are all included in
2294 sub log_request_uploads {
2296 my $request = shift;
2297 return unless $c->debug;
2298 my $uploads = $request->uploads;
2299 if ( keys %$uploads ) {
2300 my $t = Text::SimpleTable->new(
2301 [ 12, 'Parameter' ],
2306 for my $key ( sort keys %$uploads ) {
2307 my $upload = $uploads->{$key};
2308 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2309 $t->row( $key, $u->filename, $u->type, $u->size );
2312 $c->log->debug( "File Uploads are:\n" . $t->draw );
2316 =head2 $c->log_request_headers($headers);
2318 Hook method which can be wrapped by plugins to log the request headers.
2319 No-op in the default implementation.
2323 sub log_request_headers {}
2325 =head2 $c->log_headers($type => $headers)
2327 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2334 my $headers = shift; # an HTTP::Headers instance
2336 return unless $c->debug;
2338 my $column_width = Catalyst::Utils::term_width() - 28;
2339 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2342 my ( $name, $value ) = @_;
2343 $t->row( $name, $value );
2346 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2350 =head2 $c->prepare_read
2352 Prepares the input for reading.
2356 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2358 =head2 $c->prepare_request
2360 Prepares the engine request.
2364 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2366 =head2 $c->prepare_uploads
2372 sub prepare_uploads {
2375 $c->engine->prepare_uploads( $c, @_ );
2378 =head2 $c->prepare_write
2380 Prepares the output for writing.
2384 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2386 =head2 $c->request_class
2388 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2390 =head2 $c->response_class
2392 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2394 =head2 $c->read( [$maxlength] )
2396 Reads a chunk of data from the request body. This method is designed to
2397 be used in a while loop, reading C<$maxlength> bytes on every call.
2398 C<$maxlength> defaults to the size of the request if not specified.
2400 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2403 Warning: If you use read(), Catalyst will not process the body,
2404 so you will not be able to access POST parameters or file uploads via
2405 $c->request. You must handle all body parsing yourself.
2409 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2419 $app->engine_loader->needs_psgi_engine_compat_hack ?
2420 $app->engine->run($app, @_) :
2421 $app->engine->run( $app, $app->_finalized_psgi_app, @_ );
2424 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2426 Sets an action in a given namespace.
2430 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2432 =head2 $c->setup_actions($component)
2434 Sets up actions for a component.
2438 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2440 =head2 $c->setup_components
2442 This method is called internally to set up the application's components.
2444 It finds modules by calling the L<locate_components> method, expands them to
2445 package names with the L<expand_component_module> method, and then installs
2446 each component into the application.
2448 The C<setup_components> config option is passed to both of the above methods.
2450 Installation of each component is performed by the L<setup_component> method,
2455 sub setup_components {
2458 my $config = $class->config->{ setup_components };
2460 my @comps = $class->locate_components($config);
2461 my %comps = map { $_ => 1 } @comps;
2463 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2464 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2465 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2466 ) if $deprecatedcatalyst_component_names;
2468 for my $component ( @comps ) {
2470 # We pass ignore_loaded here so that overlay files for (e.g.)
2471 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2472 # we know M::P::O found a file on disk so this is safe
2474 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2477 for my $component (@comps) {
2478 my $instance = $class->components->{ $component } = $class->setup_component($component);
2479 my @expanded_components = $instance->can('expand_modules')
2480 ? $instance->expand_modules( $component, $config )
2481 : $class->expand_component_module( $component, $config );
2482 for my $component (@expanded_components) {
2483 next if $comps{$component};
2484 $class->components->{ $component } = $class->setup_component($component);
2489 =head2 $c->locate_components( $setup_component_config )
2491 This method is meant to provide a list of component modules that should be
2492 setup for the application. By default, it will use L<Module::Pluggable>.
2494 Specify a C<setup_components> config option to pass additional options directly
2495 to L<Module::Pluggable>. To add additional search paths, specify a key named
2496 C<search_extra> as an array reference. Items in the array beginning with C<::>
2497 will have the application class name prepended to them.
2501 sub locate_components {
2505 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2506 my $extra = delete $config->{ search_extra } || [];
2508 push @paths, @$extra;
2510 my $locator = Module::Pluggable::Object->new(
2511 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2515 # XXX think about ditching this sort entirely
2516 my @comps = sort { length $a <=> length $b } $locator->plugins;
2521 =head2 $c->expand_component_module( $component, $setup_component_config )
2523 Components found by C<locate_components> will be passed to this method, which
2524 is expected to return a list of component (package) names to be set up.
2528 sub expand_component_module {
2529 my ($class, $module) = @_;
2530 return Devel::InnerPackage::list_packages( $module );
2533 =head2 $c->setup_component
2537 sub setup_component {
2538 my( $class, $component ) = @_;
2540 unless ( $component->can( 'COMPONENT' ) ) {
2544 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2545 my $config = $class->config->{ $suffix } || {};
2546 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2547 # methods also pass it. local to avoid pointlessly shitting in config
2548 # for the debug screen, as $component is already the key name.
2549 local $config->{catalyst_component_name} = $component;
2551 my $instance = eval { $component->COMPONENT( $class, $config ); };
2553 if ( my $error = $@ ) {
2555 Catalyst::Exception->throw(
2556 message => qq/Couldn't instantiate component "$component", "$error"/
2560 unless (blessed $instance) {
2561 my $metaclass = Moose::Util::find_meta($component);
2562 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2563 my $component_method_from = $method_meta->associated_metaclass->name;
2564 my $value = defined($instance) ? $instance : 'undef';
2565 Catalyst::Exception->throw(
2567 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2573 =head2 $c->setup_dispatcher
2579 sub setup_dispatcher {
2580 my ( $class, $dispatcher ) = @_;
2583 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2586 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2587 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2590 unless ($dispatcher) {
2591 $dispatcher = $class->dispatcher_class;
2594 Class::MOP::load_class($dispatcher);
2596 # dispatcher instance
2597 $class->dispatcher( $dispatcher->new );
2600 =head2 $c->setup_engine
2608 $class->engine_loader->catalyst_engine_class(@_);
2612 my ($class, $requested_engine) = @_;
2614 $class->engine_loader(
2615 Catalyst::EngineLoader->new({
2616 application_name => $class,
2617 (defined $requested_engine
2618 ? (requested_engine => $requested_engine) : ()),
2622 # Don't really setup_engine -- see _setup_psgi_app for explanation.
2623 return if $class->loading_psgi_file;
2625 my $engine = $class->engine_class;
2626 Class::MOP::load_class($engine);
2628 if ($ENV{MOD_PERL}) {
2629 my $apache = $class->engine_loader->auto;
2631 my $meta = find_meta($class);
2632 my $was_immutable = $meta->is_immutable;
2633 my %immutable_options = $meta->immutable_options;
2634 $meta->make_mutable if $was_immutable;
2636 $meta->add_method(handler => sub {
2638 my $psgi_app = $class->psgi_app;
2639 $apache->call_app($r, $psgi_app);
2642 $meta->make_immutable(%immutable_options) if $was_immutable;
2645 $class->engine( $engine->new );
2650 sub _finalized_psgi_app {
2653 unless ($app->_psgi_app) {
2654 my $psgi_app = $app->_setup_psgi_app;
2655 $app->_psgi_app($psgi_app);
2658 return $app->_psgi_app;
2661 sub _setup_psgi_app {
2664 for my $home (Path::Class::Dir->new($app->config->{home})) {
2665 my $psgi_file = $home->file(
2666 Catalyst::Utils::appprefix($app) . '.psgi',
2669 next unless -e $psgi_file;
2671 # If $psgi_file calls ->setup_engine, it's doing so to load
2672 # Catalyst::Engine::PSGI. But if it does that, we're only going to
2673 # throw away the loaded PSGI-app and load the 5.9 Catalyst::Engine
2674 # anyway. So set a flag (ick) that tells setup_engine not to populate
2675 # $c->engine or do any other things we might regret.
2677 $app->loading_psgi_file(1);
2678 my $psgi_app = Plack::Util::load_psgi($psgi_file);
2679 $app->loading_psgi_file(0);
2682 unless $app->engine_loader->needs_psgi_engine_compat_hack;
2685 Found a legacy Catalyst::Engine::PSGI .psgi file at ${psgi_file}.
2687 Its content has been ignored. Please consult the Catalyst::Upgrading
2688 documentation on how to upgrade from Catalyst::Engine::PSGI.
2692 return $app->apply_default_middlewares($app->psgi_app);
2695 =head2 $c->apply_default_middlewares
2697 Adds the following L<Plack> middlewares to your application, since they are
2698 useful and commonly needed:
2700 L<Plack::Middleware::ReverseProxy>, (conditionally added based on the status
2701 of your $ENV{REMOTE_ADDR}, and can be forced on with C<using_frontend_proxy>
2702 or forced off with C<ignore_frontend_proxy>), L<Plack::Middleware::LighttpdScriptNameFix>
2703 (if you are using Lighttpd), L<Plack::Middleware::IIS6ScriptNameFix> (always
2704 applied since this middleware is smart enough to conditionally apply itself).
2706 Additionally if we detect we are using Nginx, we add a bit of custom middleware
2707 to solve some problems with the way that server handles $ENV{PATH_INFO} and
2713 sub apply_default_middlewares {
2714 my ($app, $psgi_app) = @_;
2716 $psgi_app = Plack::Middleware::Conditional->wrap(
2718 builder => sub { Plack::Middleware::ReverseProxy->wrap($_[0]) },
2721 return if $app->config->{ignore_frontend_proxy};
2722 return $env->{REMOTE_ADDR} eq '127.0.0.1'
2723 || $app->config->{using_frontend_proxy};
2727 my $server_matches = sub {
2731 my $server = $env->{SERVER_SOFTWARE};
2732 return unless $server;
2733 return $server =~ $re ? 1 : 0;
2737 # If we're running under Lighttpd, swap PATH_INFO and SCRIPT_NAME
2738 # http://lists.scsys.co.uk/pipermail/catalyst/2006-June/008361.html
2739 $psgi_app = Plack::Middleware::LighttpdScriptNameFix->wrap($psgi_app);
2741 $psgi_app = Plack::Middleware::Conditional->wrap(
2743 condition => $server_matches->(qr/^nginx/),
2748 my $script_name = $env->{SCRIPT_NAME};
2749 $env->{PATH_INFO} =~ s/^$script_name//g;
2750 return $to_wrap->($env);
2755 # we're applying this unconditionally as the middleware itself already makes
2756 # sure it doesn't fuck things up if it's not running under one of the right
2758 $psgi_app = Plack::Middleware::IIS6ScriptNameFix->wrap($psgi_app);
2765 Returns a PSGI application code reference for the catalyst application
2766 C<$c>. This is the bare application without any middlewares
2767 applied. C<${myapp}.psgi> is not taken into account.
2769 This is what you want to be using to retrieve the PSGI application code
2770 reference of your Catalyst application for use in F<.psgi> files.
2776 return $app->engine->build_psgi_app($app);
2779 =head2 $c->setup_home
2781 Sets up the home directory.
2786 my ( $class, $home ) = @_;
2788 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2792 $home ||= Catalyst::Utils::home($class);
2795 #I remember recently being scolded for assigning config values like this
2796 $class->config->{home} ||= $home;
2797 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2801 =head2 $c->setup_log
2803 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2804 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2807 This method also installs a C<debug> method that returns a true value into the
2808 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2809 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2811 Note that if the log has already been setup, by either a previous call to
2812 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2813 that this method won't actually set up the log object.
2818 my ( $class, $levels ) = @_;
2821 $levels =~ s/^\s+//;
2822 $levels =~ s/\s+$//;
2823 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2825 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2826 if ( defined $env_debug ) {
2827 $levels{debug} = 1 if $env_debug; # Ugly!
2828 delete($levels{debug}) unless $env_debug;
2831 unless ( $class->log ) {
2832 $class->log( Catalyst::Log->new(keys %levels) );
2835 if ( $levels{debug} ) {
2836 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2837 $class->log->debug('Debug messages enabled');
2841 =head2 $c->setup_plugins
2847 =head2 $c->setup_stats
2849 Sets up timing statistics class.
2854 my ( $class, $stats ) = @_;
2856 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2858 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2859 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2860 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2861 $class->log->debug('Statistics enabled');
2866 =head2 $c->registered_plugins
2868 Returns a sorted list of the plugins which have either been stated in the
2869 import list or which have been added via C<< MyApp->plugin(@args); >>.
2871 If passed a given plugin name, it will report a boolean value indicating
2872 whether or not that plugin is loaded. A fully qualified name is required if
2873 the plugin name does not begin with C<Catalyst::Plugin::>.
2875 if ($c->registered_plugins('Some::Plugin')) {
2883 sub registered_plugins {
2885 return sort keys %{ $proto->_plugins } unless @_;
2887 return 1 if exists $proto->_plugins->{$plugin};
2888 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2891 sub _register_plugin {
2892 my ( $proto, $plugin, $instant ) = @_;
2893 my $class = ref $proto || $proto;
2895 Class::MOP::load_class( $plugin );
2896 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2897 if $plugin->isa( 'Catalyst::Component' );
2898 $proto->_plugins->{$plugin} = 1;
2900 my $meta = Class::MOP::get_metaclass_by_name($class);
2901 $meta->superclasses($plugin, $meta->superclasses);
2907 my ( $class, $plugins ) = @_;
2909 $class->_plugins( {} ) unless $class->_plugins;
2910 $plugins = Data::OptList::mkopt($plugins || []);
2913 [ Catalyst::Utils::resolve_namespace(
2914 $class . '::Plugin',
2915 'Catalyst::Plugin', $_->[0]
2921 for my $plugin ( reverse @plugins ) {
2922 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2923 my $meta = find_meta($plugin->[0]);
2924 next if $meta && $meta->isa('Moose::Meta::Role');
2926 $class->_register_plugin($plugin->[0]);
2930 map { $_->[0]->name, $_->[1] }
2931 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2932 map { [find_meta($_->[0]), $_->[1]] }
2935 Moose::Util::apply_all_roles(
2943 Returns an arrayref of the internal execution stack (actions that are
2944 currently executing).
2948 Returns the current timing statistics object. By default Catalyst uses
2949 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2950 L<< stats_class|/"$c->stats_class" >>.
2952 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2953 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2954 profile explicitly, although MyApp.pm still won't profile nor output anything
2957 =head2 $c->stats_class
2959 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2961 =head2 $c->use_stats
2963 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2965 Note that this is a static method, not an accessor and should be overridden
2966 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2973 =head2 $c->write( $data )
2975 Writes $data to the output stream. When using this method directly, you
2976 will need to manually set the C<Content-Length> header to the length of
2977 your output data, if known.
2984 # Finalize headers if someone manually writes output
2985 $c->finalize_headers;
2987 return $c->engine->write( $c, @_ );
2992 Returns the Catalyst version number. Mostly useful for "powered by"
2993 messages in template systems.
2997 sub version { return $Catalyst::VERSION }
2999 =head1 CONFIGURATION
3001 There are a number of 'base' config variables which can be set:
3007 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
3011 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
3015 C<disable_component_resolution_regex_fallback> - Turns
3016 off the deprecated component resolution functionality so
3017 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
3018 are called then regex search will not be attempted on string values and
3019 instead C<undef> will be returned.
3023 C<home> - The application home directory. In an uninstalled application,
3024 this is the top level application directory. In an installed application,
3025 this will be the directory containing C<< MyApp.pm >>.
3029 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
3033 C<name> - The name of the application in debug messages and the debug and
3038 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
3039 until it is accessed. This allows you to (for example) check authentication (and reject
3040 the upload) before actually receiving all the data. See L</ON-DEMAND PARSER>
3044 C<root> - The root directory for templates. Usually this is just a
3045 subdirectory of the home directory, but you can set it to change the
3046 templates to a different directory.
3050 C<search_extra> - Array reference passed to Module::Pluggable to for additional
3051 namespaces from which components will be loaded (and constructed and stored in
3052 C<< $c->components >>).
3056 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
3057 to be shown in hit debug tables in the test server.
3061 C<use_request_uri_for_path> - Controls if the C<REQUEST_URI> or C<PATH_INFO> environment
3062 variable should be used for determining the request path. See L<Catalyst::Engine::CGI/PATH DECODING>
3063 for more information.
3067 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
3071 =head1 INTERNAL ACTIONS
3073 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
3074 C<_ACTION>, and C<_END>. These are by default not shown in the private
3075 action table, but you can make them visible with a config parameter.
3077 MyApp->config(show_internal_actions => 1);
3079 =head1 ON-DEMAND PARSER
3081 The request body is usually parsed at the beginning of a request,
3082 but if you want to handle input yourself, you can enable on-demand
3083 parsing with a config parameter.
3085 MyApp->config(parse_on_demand => 1);
3087 =head1 PROXY SUPPORT
3089 Many production servers operate using the common double-server approach,
3090 with a lightweight frontend web server passing requests to a larger
3091 backend server. An application running on the backend server must deal
3092 with two problems: the remote user always appears to be C<127.0.0.1> and
3093 the server's hostname will appear to be C<localhost> regardless of the
3094 virtual host that the user connected through.
3096 Catalyst will automatically detect this situation when you are running
3097 the frontend and backend servers on the same machine. The following
3098 changes are made to the request.
3100 $c->req->address is set to the user's real IP address, as read from
3101 the HTTP X-Forwarded-For header.
3103 The host value for $c->req->base and $c->req->uri is set to the real
3104 host, as read from the HTTP X-Forwarded-Host header.
3106 Additionally, you may be running your backend application on an insecure
3107 connection (port 80) while your frontend proxy is running under SSL. If there
3108 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
3109 tell Catalyst what port the frontend listens on. This will allow all URIs to
3110 be created properly.
3112 In the case of passing in:
3114 X-Forwarded-Port: 443
3116 All calls to C<uri_for> will result in an https link, as is expected.
3118 Obviously, your web server must support these headers for this to work.
3120 In a more complex server farm environment where you may have your
3121 frontend proxy server(s) on different machines, you will need to set a
3122 configuration option to tell Catalyst to read the proxied data from the
3125 MyApp->config(using_frontend_proxy => 1);
3127 If you do not wish to use the proxy support at all, you may set:
3129 MyApp->config(ignore_frontend_proxy => 1);
3131 =head1 THREAD SAFETY
3133 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3134 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3135 believe the Catalyst core to be thread-safe.
3137 If you plan to operate in a threaded environment, remember that all other
3138 modules you are using must also be thread-safe. Some modules, most notably
3139 L<DBD::SQLite>, are not thread-safe.
3145 Join #catalyst on irc.perl.org.
3149 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3150 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3154 http://catalyst.perl.org
3158 http://dev.catalyst.perl.org
3162 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3164 =head2 L<Catalyst::Manual> - The Catalyst Manual
3166 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3168 =head2 L<Catalyst::Engine> - Core engine
3170 =head2 L<Catalyst::Log> - Log class.
3172 =head2 L<Catalyst::Request> - Request object
3174 =head2 L<Catalyst::Response> - Response object
3176 =head2 L<Catalyst::Test> - The test suite.
3180 =head1 PROJECT FOUNDER
3182 sri: Sebastian Riedel <sri@cpan.org>
3188 acme: Leon Brocard <leon@astray.com>
3190 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3194 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3198 andyg: Andy Grundman <andy@hybridized.org>
3200 audreyt: Audrey Tang
3202 bricas: Brian Cassidy <bricas@cpan.org>
3204 Caelum: Rafael Kitover <rkitover@io.com>
3206 chansen: Christian Hansen
3208 chicks: Christopher Hicks
3210 Chisel Wright C<pause@herlpacker.co.uk>
3212 Danijel Milicevic C<me@danijel.de>
3214 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3216 David Naughton, C<naughton@umn.edu>
3220 dhoss: Devin Austin <dhoss@cpan.org>
3222 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3226 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3228 esskar: Sascha Kiefer
3230 fireartist: Carl Franks <cfranks@cpan.org>
3232 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3234 gabb: Danijel Milicevic
3238 Gavin Henry C<ghenry@perl.me.uk>
3242 groditi: Guillermo Roditi <groditi@gmail.com>
3244 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3246 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3248 jcamacho: Juan Camacho
3250 jester: Jesse Sheidlower C<jester@panix.com>
3252 jhannah: Jay Hannah <jay@jays.net>
3258 jon: Jon Schutz <jjschutz@cpan.org>
3260 Jonathan Rockway C<< <jrockway@cpan.org> >>
3262 Kieren Diment C<kd@totaldatasolution.com>
3264 konobi: Scott McWhirter <konobi@cpan.org>
3266 marcus: Marcus Ramberg <mramberg@cpan.org>
3268 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3270 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3274 naughton: David Naughton
3276 ningu: David Kamholz <dkamholz@cpan.org>
3278 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3280 numa: Dan Sully <daniel@cpan.org>
3286 omega: Andreas Marienborg
3288 Oleg Kostyuk <cub.uanic@gmail.com>
3290 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3292 rafl: Florian Ragwitz <rafl@debian.org>
3294 random: Roland Lammel <lammel@cpan.org>
3296 Robert Sedlacek C<< <rs@474.at> >>
3298 SpiceMan: Marcel Montes
3302 szbalint: Balint Szilakszi <szbalint@cpan.org>
3304 t0m: Tomas Doran <bobtfish@bobtfish.net>
3308 Viljo Marrandi C<vilts@yahoo.com>
3310 Will Hawes C<info@whawes.co.uk>
3312 willert: Sebastian Willert <willert@cpan.org>
3314 wreis: Wallace Reis <wallace@reis.org.br>
3316 Yuval Kogman, C<nothingmuch@woobling.org>
3318 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3320 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3326 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3330 This library is free software. You can redistribute it and/or modify it under
3331 the same terms as Perl itself.
3337 __PACKAGE__->meta->make_immutable;