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 { {} });
54 $p{_uploadtmp} = $self->_uploadtmp if $self->_has_uploadtmp;
55 $self->request_class->new(\%p);
59 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
60 has namespace => (is => 'rw');
62 sub depth { scalar @{ shift->stack || [] }; }
63 sub comp { shift->component(@_) }
66 my $self = shift; return $self->request(@_);
69 my $self = shift; return $self->response(@_);
72 # For backwards compatibility
73 sub finalize_output { shift->finalize_body(@_) };
78 our $RECURSION = 1000;
79 our $DETACH = Catalyst::Exception::Detach->new;
80 our $GO = Catalyst::Exception::Go->new;
82 #I imagine that very few of these really need to be class variables. if any.
83 #maybe we should just make them attributes with a default?
84 __PACKAGE__->mk_classdata($_)
85 for qw/components arguments dispatcher engine log dispatcher_class
86 engine_loader context_class request_class response_class stats_class
87 setup_finished _psgi_app loading_psgi_file run_options/;
89 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
90 __PACKAGE__->request_class('Catalyst::Request');
91 __PACKAGE__->response_class('Catalyst::Response');
92 __PACKAGE__->stats_class('Catalyst::Stats');
94 # Remember to update this in Catalyst::Runtime as well!
96 our $VERSION = '5.90006';
99 my ( $class, @arguments ) = @_;
101 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
103 return unless $class eq 'Catalyst';
105 my $caller = caller();
106 return if $caller eq 'main';
108 my $meta = Moose::Meta::Class->initialize($caller);
109 unless ( $caller->isa('Catalyst') ) {
110 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Controller');
111 $meta->superclasses(@superclasses);
113 # Avoid possible C3 issues if 'Moose::Object' is already on RHS of MyApp
114 $meta->superclasses(grep { $_ ne 'Moose::Object' } $meta->superclasses);
116 unless( $meta->has_method('meta') ){
117 if ($Moose::VERSION >= 1.15) {
118 $meta->_add_meta_method('meta');
121 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
125 $caller->arguments( [@arguments] );
129 sub _application { $_[0] }
133 Catalyst - The Elegant MVC Web Application Framework
137 See the L<Catalyst::Manual> distribution for comprehensive
138 documentation and tutorials.
140 # Install Catalyst::Devel for helpers and other development tools
141 # use the helper to create a new application
144 # add models, views, controllers
145 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
146 script/myapp_create.pl view MyTemplate TT
147 script/myapp_create.pl controller Search
149 # built in testserver -- use -r to restart automatically on changes
150 # --help to see all available options
151 script/myapp_server.pl
153 # command line testing interface
154 script/myapp_test.pl /yada
157 use Catalyst qw/-Debug/; # include plugins here as well
159 ### In lib/MyApp/Controller/Root.pm (autocreated)
160 sub foo : Chained('/') Args() { # called for /foo, /foo/1, /foo/1/2, etc.
161 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
162 $c->stash->{template} = 'foo.tt'; # set the template
163 # lookup something from db -- stash vars are passed to TT
165 $c->model('Database::Foo')->search( { country => $args[0] } );
166 if ( $c->req->params->{bar} ) { # access GET or POST parameters
167 $c->forward( 'bar' ); # process another action
168 # do something else after forward returns
172 # The foo.tt TT template can use the stash data from the database
173 [% WHILE (item = data.next) %]
177 # called for /bar/of/soap, /bar/of/soap/10, etc.
178 sub bar : Chained('/') PathPart('/bar/of/soap') Args() { ... }
180 # called after all actions are finished
182 my ( $self, $c ) = @_;
183 if ( scalar @{ $c->error } ) { ... } # handle errors
184 return if $c->res->body; # already have a response
185 $c->forward( 'MyApp::View::TT' ); # render template
188 See L<Catalyst::Manual::Intro> for additional information.
192 Catalyst is a modern framework for making web applications without the
193 pain usually associated with this process. This document is a reference
194 to the main Catalyst application. If you are a new user, we suggest you
195 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
197 See L<Catalyst::Manual> for more documentation.
199 Catalyst plugins can be loaded by naming them as arguments to the "use
200 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
201 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
204 use Catalyst qw/My::Module/;
206 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
207 fully qualify the name by using a unary plus:
211 +Fully::Qualified::Plugin::Name
214 Special flags like C<-Debug> can also be specified as
215 arguments when Catalyst is loaded:
217 use Catalyst qw/-Debug My::Module/;
219 The position of plugins and flags in the chain is important, because
220 they are loaded in the order in which they appear.
222 The following flags are supported:
226 Enables debug output. You can also force this setting from the system
227 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
228 settings override the application, with <MYAPP>_DEBUG having the highest
231 This sets the log level to 'debug' and enables full debug output on the
232 error screen. If you only want the latter, see L<< $c->debug >>.
236 Forces Catalyst to use a specific home directory, e.g.:
238 use Catalyst qw[-Home=/usr/mst];
240 This can also be done in the shell environment by setting either the
241 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
242 is replaced with the uppercased name of your application, any "::" in
243 the name will be replaced with underscores, e.g. MyApp::Web should use
244 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
246 If none of these are set, Catalyst will attempt to automatically detect the
247 home directory. If you are working in a development environment, Catalyst
248 will try and find the directory containing either Makefile.PL, Build.PL or
249 dist.ini. If the application has been installed into the system (i.e.
250 you have done C<make install>), then Catalyst will use the path to your
251 application module, without the .pm extension (e.g., /foo/MyApp if your
252 application was installed at /foo/MyApp.pm)
256 use Catalyst '-Log=warn,fatal,error';
258 Specifies a comma-delimited list of log levels.
262 Enables statistics collection and reporting.
264 use Catalyst qw/-Stats=1/;
266 You can also force this setting from the system environment with CATALYST_STATS
267 or <MYAPP>_STATS. The environment settings override the application, with
268 <MYAPP>_STATS having the highest priority.
270 Stats are also enabled if L<< debugging |/"-Debug" >> is enabled.
274 =head2 INFORMATION ABOUT THE CURRENT REQUEST
278 Returns a L<Catalyst::Action> object for the current action, which
279 stringifies to the action name. See L<Catalyst::Action>.
283 Returns the namespace of the current action, i.e., the URI prefix
284 corresponding to the controller of the current action. For example:
286 # in Controller::Foo::Bar
287 $c->namespace; # returns 'foo/bar';
293 Returns the current L<Catalyst::Request> object, giving access to
294 information about the current client request (including parameters,
295 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
297 =head2 REQUEST FLOW HANDLING
299 =head2 $c->forward( $action [, \@arguments ] )
301 =head2 $c->forward( $class, $method, [, \@arguments ] )
303 Forwards processing to another action, by its private name. If you give a
304 class name but no method, C<process()> is called. You may also optionally
305 pass arguments in an arrayref. The action will receive the arguments in
306 C<@_> and C<< $c->req->args >>. Upon returning from the function,
307 C<< $c->req->args >> will be restored to the previous values.
309 Any data C<return>ed from the action forwarded to, will be returned by the
312 my $foodata = $c->forward('/foo');
313 $c->forward('index');
314 $c->forward(qw/Model::DBIC::Foo do_stuff/);
315 $c->forward('View::TT');
317 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
318 an C<< eval { } >> around the call (actually
319 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus rendering all
320 exceptions thrown by the called action non-fatal and pushing them onto
321 $c->error instead. If you want C<die> to propagate you need to do something
325 die join "\n", @{ $c->error } if @{ $c->error };
327 Or make sure to always return true values from your actions and write
330 $c->forward('foo') || return;
332 Another note is that C<< $c->forward >> always returns a scalar because it
333 actually returns $c->state which operates in a scalar context.
334 Thus, something like:
338 in an action that is forwarded to is going to return a scalar,
339 i.e. how many items are in that array, which is probably not what you want.
340 If you need to return an array then return a reference to it,
343 $c->stash->{array} = \@array;
345 and access it from the stash.
347 Keep in mind that the C<end> method used is that of the caller action. So a C<$c-E<gt>detach> inside a forwarded action would run the C<end> method from the original action requested.
351 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
353 =head2 $c->detach( $action [, \@arguments ] )
355 =head2 $c->detach( $class, $method, [, \@arguments ] )
359 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
360 doesn't return to the previous action when processing is finished.
362 When called with no arguments it escapes the processing chain entirely.
366 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
368 =head2 $c->visit( $action [, \@captures, \@arguments ] )
370 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
372 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
373 but does a full dispatch, instead of just calling the new C<$action> /
374 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
375 you go to are called, just like a new request.
377 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
378 This means, for example, that C<< $c->action >> methods such as
379 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
380 L<reverse|Catalyst::Action/reverse> return information for the visited action
381 when they are invoked within the visited action. This is different from the
382 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
383 continues to use the $c->action object from the caller action even when
384 invoked from the called action.
386 C<< $c->stash >> is kept unchanged.
388 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
389 allows you to "wrap" another action, just as it would have been called by
390 dispatching from a URL, while the analogous
391 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
392 transfer control to another action as if it had been reached directly from a URL.
396 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
398 =head2 $c->go( $action [, \@captures, \@arguments ] )
400 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
402 The relationship between C<go> and
403 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
404 the relationship between
405 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
406 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
407 C<< $c->go >> will perform a full dispatch on the specified action or method,
408 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
409 C<go> escapes the processing of the current request chain on completion, and
410 does not return to its caller.
412 @arguments are arguments to the final destination of $action. @captures are
413 arguments to the intermediate steps, if any, on the way to the final sub of
418 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
424 Returns the current L<Catalyst::Response> object, see there for details.
428 Returns a hashref to the stash, which may be used to store data and pass
429 it between components during a request. You can also set hash keys by
430 passing arguments. The stash is automatically sent to the view. The
431 stash is cleared at the end of a request; it cannot be used for
432 persistent storage (for this you must use a session; see
433 L<Catalyst::Plugin::Session> for a complete system integrated with
436 $c->stash->{foo} = $bar;
437 $c->stash( { moose => 'majestic', qux => 0 } );
438 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
440 # stash is automatically passed to the view for use in a template
441 $c->forward( 'MyApp::View::TT' );
445 around stash => sub {
448 my $stash = $orig->($c);
450 my $new_stash = @_ > 1 ? {@_} : $_[0];
451 croak('stash takes a hash or hashref') unless ref $new_stash;
452 foreach my $key ( keys %$new_stash ) {
453 $stash->{$key} = $new_stash->{$key};
463 =head2 $c->error($error, ...)
465 =head2 $c->error($arrayref)
467 Returns an arrayref containing error messages. If Catalyst encounters an
468 error while processing a request, it stores the error in $c->error. This
469 method should only be used to store fatal error messages.
471 my @error = @{ $c->error };
475 $c->error('Something bad happened');
482 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
483 croak @$error unless ref $c;
484 push @{ $c->{error} }, @$error;
486 elsif ( defined $_[0] ) { $c->{error} = undef }
487 return $c->{error} || [];
493 Contains the return value of the last executed action.
494 Note that << $c->state >> operates in a scalar context which means that all
495 values it returns are scalar.
497 =head2 $c->clear_errors
499 Clear errors. You probably don't want to clear the errors unless you are
500 implementing a custom error screen.
502 This is equivalent to running
513 sub _comp_search_prefixes {
515 return map $c->components->{ $_ }, $c->_comp_names_search_prefixes(@_);
518 # search components given a name and some prefixes
519 sub _comp_names_search_prefixes {
520 my ( $c, $name, @prefixes ) = @_;
521 my $appclass = ref $c || $c;
522 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
523 $filter = qr/$filter/; # Compile regex now rather than once per loop
525 # map the original component name to the sub part that we will search against
526 my %eligible = map { my $n = $_; $n =~ s{^$appclass\::[^:]+::}{}; $_ => $n; }
527 grep { /$filter/ } keys %{ $c->components };
529 # undef for a name will return all
530 return keys %eligible if !defined $name;
532 my $query = ref $name ? $name : qr/^$name$/i;
533 my @result = grep { $eligible{$_} =~ m{$query} } keys %eligible;
535 return @result if @result;
537 # if we were given a regexp to search against, we're done.
540 # skip regexp fallback if configured
542 if $appclass->config->{disable_component_resolution_regex_fallback};
546 @result = grep { $eligible{ $_ } =~ m{$query} } keys %eligible;
548 # no results? try against full names
550 @result = grep { m{$query} } keys %eligible;
553 # don't warn if we didn't find any results, it just might not exist
555 # Disgusting hack to work out correct method name
556 my $warn_for = lc $prefixes[0];
557 my $msg = "Used regexp fallback for \$c->${warn_for}('${name}'), which found '" .
558 (join '", "', @result) . "'. Relying on regexp fallback behavior for " .
559 "component resolution is unreliable and unsafe.";
560 my $short = $result[0];
561 # remove the component namespace prefix
562 $short =~ s/.*?(Model|Controller|View):://;
563 my $shortmess = Carp::shortmess('');
564 if ($shortmess =~ m#Catalyst/Plugin#) {
565 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
567 } elsif ($shortmess =~ m#Catalyst/lib/(View|Controller)#) {
568 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
569 "component's config";
571 $msg .= " You probably meant \$c->${warn_for}('$short') instead of \$c->${warn_for}('${name}'), " .
572 "but if you really wanted to search, pass in a regexp as the argument " .
573 "like so: \$c->${warn_for}(qr/${name}/)";
575 $c->log->warn( "${msg}$shortmess" );
581 # Find possible names for a prefix
583 my ( $c, @prefixes ) = @_;
584 my $appclass = ref $c || $c;
586 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
588 my @names = map { s{$filter}{}; $_; }
589 $c->_comp_names_search_prefixes( undef, @prefixes );
594 # Filter a component before returning by calling ACCEPT_CONTEXT if available
595 sub _filter_component {
596 my ( $c, $comp, @args ) = @_;
598 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
599 return $comp->ACCEPT_CONTEXT( $c, @args );
605 =head2 COMPONENT ACCESSORS
607 =head2 $c->controller($name)
609 Gets a L<Catalyst::Controller> instance by name.
611 $c->controller('Foo')->do_stuff;
613 If the name is omitted, will return the controller for the dispatched
616 If you want to search for controllers, pass in a regexp as the argument.
618 # find all controllers that start with Foo
619 my @foo_controllers = $c->controller(qr{^Foo});
625 my ( $c, $name, @args ) = @_;
627 my $appclass = ref($c) || $c;
629 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
630 my $comps = $c->components;
631 my $check = $appclass."::Controller::".$name;
632 return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check};
634 my @result = $c->_comp_search_prefixes( $name, qw/Controller C/ );
635 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
636 return $c->_filter_component( $result[ 0 ], @args );
639 return $c->component( $c->action->class );
642 =head2 $c->model($name)
644 Gets a L<Catalyst::Model> instance by name.
646 $c->model('Foo')->do_stuff;
648 Any extra arguments are directly passed to ACCEPT_CONTEXT.
650 If the name is omitted, it will look for
651 - a model object in $c->stash->{current_model_instance}, then
652 - a model name in $c->stash->{current_model}, then
653 - a config setting 'default_model', or
654 - check if there is only one model, and return it if that's the case.
656 If you want to search for models, pass in a regexp as the argument.
658 # find all models that start with Foo
659 my @foo_models = $c->model(qr{^Foo});
664 my ( $c, $name, @args ) = @_;
665 my $appclass = ref($c) || $c;
667 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
668 my $comps = $c->components;
669 my $check = $appclass."::Model::".$name;
670 return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check};
672 my @result = $c->_comp_search_prefixes( $name, qw/Model M/ );
673 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
674 return $c->_filter_component( $result[ 0 ], @args );
678 return $c->stash->{current_model_instance}
679 if $c->stash->{current_model_instance};
680 return $c->model( $c->stash->{current_model} )
681 if $c->stash->{current_model};
683 return $c->model( $appclass->config->{default_model} )
684 if $appclass->config->{default_model};
686 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/Model M/);
689 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
690 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
691 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
692 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
693 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
696 return $c->_filter_component( $comp );
700 =head2 $c->view($name)
702 Gets a L<Catalyst::View> instance by name.
704 $c->view('Foo')->do_stuff;
706 Any extra arguments are directly passed to ACCEPT_CONTEXT.
708 If the name is omitted, it will look for
709 - a view object in $c->stash->{current_view_instance}, then
710 - a view name in $c->stash->{current_view}, then
711 - a config setting 'default_view', or
712 - check if there is only one view, and return it if that's the case.
714 If you want to search for views, pass in a regexp as the argument.
716 # find all views that start with Foo
717 my @foo_views = $c->view(qr{^Foo});
722 my ( $c, $name, @args ) = @_;
724 my $appclass = ref($c) || $c;
726 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
727 my $comps = $c->components;
728 my $check = $appclass."::View::".$name;
729 if( exists $comps->{$check} ) {
730 return $c->_filter_component( $comps->{$check}, @args );
733 $c->log->warn( "Attempted to use view '$check', but does not exist" );
736 my @result = $c->_comp_search_prefixes( $name, qw/View V/ );
737 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
738 return $c->_filter_component( $result[ 0 ], @args );
742 return $c->stash->{current_view_instance}
743 if $c->stash->{current_view_instance};
744 return $c->view( $c->stash->{current_view} )
745 if $c->stash->{current_view};
747 return $c->view( $appclass->config->{default_view} )
748 if $appclass->config->{default_view};
750 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/View V/);
753 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
754 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
755 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
756 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
757 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
760 return $c->_filter_component( $comp );
763 =head2 $c->controllers
765 Returns the available names which can be passed to $c->controller
771 return $c->_comp_names(qw/Controller C/);
776 Returns the available names which can be passed to $c->model
782 return $c->_comp_names(qw/Model M/);
788 Returns the available names which can be passed to $c->view
794 return $c->_comp_names(qw/View V/);
797 =head2 $c->comp($name)
799 =head2 $c->component($name)
801 Gets a component object by name. This method is not recommended,
802 unless you want to get a specific component by full
803 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
804 should be used instead.
806 If C<$name> is a regexp, a list of components matched against the full
807 component name will be returned.
809 If Catalyst can't find a component by name, it will fallback to regex
810 matching by default. To disable this behaviour set
811 disable_component_resolution_regex_fallback to a true value.
813 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
818 my ( $c, $name, @args ) = @_;
821 my $comps = $c->components;
824 # is it the exact name?
825 return $c->_filter_component( $comps->{ $name }, @args )
826 if exists $comps->{ $name };
828 # perhaps we just omitted "MyApp"?
829 my $composed = ( ref $c || $c ) . "::${name}";
830 return $c->_filter_component( $comps->{ $composed }, @args )
831 if exists $comps->{ $composed };
833 # search all of the models, views and controllers
834 my( $comp ) = $c->_comp_search_prefixes( $name, qw/Model M Controller C View V/ );
835 return $c->_filter_component( $comp, @args ) if $comp;
839 if $c->config->{disable_component_resolution_regex_fallback};
841 # This is here so $c->comp( '::M::' ) works
842 my $query = ref $name ? $name : qr{$name}i;
844 my @result = grep { m{$query} } keys %{ $c->components };
845 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
848 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
849 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
850 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
851 return $c->_filter_component( $result[ 0 ], @args );
854 # I would expect to return an empty list here, but that breaks back-compat
858 return sort keys %{ $c->components };
861 =head2 CLASS DATA AND HELPER CLASSES
865 Returns or takes a hashref containing the application's configuration.
867 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
869 You can also use a C<YAML>, C<XML> or L<Config::General> config file
870 like C<myapp.conf> in your applications home directory. See
871 L<Catalyst::Plugin::ConfigLoader>.
873 =head3 Cascading configuration
875 The config method is present on all Catalyst components, and configuration
876 will be merged when an application is started. Configuration loaded with
877 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
878 followed by configuration in your top level C<MyApp> class. These two
879 configurations are merged, and then configuration data whose hash key matches a
880 component name is merged with configuration for that component.
882 The configuration for a component is then passed to the C<new> method when a
883 component is constructed.
887 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
888 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
890 will mean that C<MyApp::Model::Foo> receives the following data when
893 MyApp::Model::Foo->new({
899 It's common practice to use a Moose attribute
900 on the receiving component to access the config value.
902 package MyApp::Model::Foo;
906 # this attr will receive 'baz' at construction time
912 You can then get the value 'baz' by calling $c->model('Foo')->bar
913 (or $self->bar inside code in the model).
915 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
916 as a way of reading config within your code, as this B<will not> give you the
917 correctly merged config back. You B<MUST> take the config values supplied to
918 the constructor and use those instead.
922 around config => sub {
926 croak('Setting config after setup has been run is not allowed.')
927 if ( @_ and $c->setup_finished );
934 Returns the logging object instance. Unless it is already set, Catalyst
935 sets this up with a L<Catalyst::Log> object. To use your own log class,
936 set the logger with the C<< __PACKAGE__->log >> method prior to calling
937 C<< __PACKAGE__->setup >>.
939 __PACKAGE__->log( MyLogger->new );
944 $c->log->info( 'Now logging with my own logger!' );
946 Your log class should implement the methods described in
952 Returns 1 if debug mode is enabled, 0 otherwise.
954 You can enable debug mode in several ways:
958 =item By calling myapp_server.pl with the -d flag
960 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
962 =item The -Debug option in your MyApp.pm
964 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
968 The first three also set the log level to 'debug'.
970 Calling C<< $c->debug(1) >> has no effect.
976 =head2 $c->dispatcher
978 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
982 Returns the engine instance. See L<Catalyst::Engine>.
985 =head2 UTILITY METHODS
987 =head2 $c->path_to(@path)
989 Merges C<@path> with C<< $c->config->{home} >> and returns a
990 L<Path::Class::Dir> object. Note you can usually use this object as
991 a filename, but sometimes you will have to explicitly stringify it
992 yourself by calling the C<< ->stringify >> method.
996 $c->path_to( 'db', 'sqlite.db' );
1001 my ( $c, @path ) = @_;
1002 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
1003 if ( -d $path ) { return $path }
1004 else { return Path::Class::File->new( $c->config->{home}, @path ) }
1008 my ( $class, $name, $plugin, @args ) = @_;
1010 # See block comment in t/unit_core_plugin.t
1011 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in a future release/);
1013 $class->_register_plugin( $plugin, 1 );
1015 eval { $plugin->import };
1016 $class->mk_classdata($name);
1018 eval { $obj = $plugin->new(@args) };
1021 Catalyst::Exception->throw( message =>
1022 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1025 $class->$name($obj);
1026 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1032 Initializes the dispatcher and engine, loads any plugins, and loads the
1033 model, view, and controller components. You may also specify an array
1034 of plugins to load here, if you choose to not load them in the C<use
1038 MyApp->setup( qw/-Debug/ );
1040 B<Note:> You B<should not> wrap this method with method modifiers
1041 or bad things will happen - wrap the C<setup_finalize> method instead.
1046 my ( $class, @arguments ) = @_;
1047 croak('Running setup more than once')
1048 if ( $class->setup_finished );
1050 unless ( $class->isa('Catalyst') ) {
1052 Catalyst::Exception->throw(
1053 message => qq/'$class' does not inherit from Catalyst/ );
1056 if ( $class->arguments ) {
1057 @arguments = ( @arguments, @{ $class->arguments } );
1063 foreach (@arguments) {
1067 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1069 elsif (/^-(\w+)=?(.*)$/) {
1070 $flags->{ lc $1 } = $2;
1073 push @{ $flags->{plugins} }, $_;
1077 $class->setup_home( delete $flags->{home} );
1079 $class->setup_log( delete $flags->{log} );
1080 $class->setup_plugins( delete $flags->{plugins} );
1081 $class->setup_dispatcher( delete $flags->{dispatcher} );
1082 if (my $engine = delete $flags->{engine}) {
1083 $class->log->warn("Specifying the engine in ->setup is no longer supported, see Catalyst::Upgrading");
1085 $class->setup_engine();
1086 $class->setup_stats( delete $flags->{stats} );
1088 for my $flag ( sort keys %{$flags} ) {
1090 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1091 &$code( $class, delete $flags->{$flag} );
1094 $class->log->warn(qq/Unknown flag "$flag"/);
1098 eval { require Catalyst::Devel; };
1099 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1100 $class->log->warn(<<"EOF");
1101 You are running an old script!
1103 Please update by running (this will overwrite existing files):
1104 catalyst.pl -force -scripts $class
1106 or (this will not overwrite existing files):
1107 catalyst.pl -scripts $class
1112 if ( $class->debug ) {
1113 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1116 my $column_width = Catalyst::Utils::term_width() - 6;
1117 my $t = Text::SimpleTable->new($column_width);
1118 $t->row($_) for @plugins;
1119 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1122 my $dispatcher = $class->dispatcher;
1123 my $engine = $class->engine;
1124 my $home = $class->config->{home};
1126 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1127 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1131 ? $class->log->debug(qq/Found home "$home"/)
1132 : $class->log->debug(qq/Home "$home" doesn't exist/)
1133 : $class->log->debug(q/Couldn't find home/);
1136 # Call plugins setup, this is stupid and evil.
1137 # Also screws C3 badly on 5.10, hack to avoid.
1139 no warnings qw/redefine/;
1140 local *setup = sub { };
1141 $class->setup unless $Catalyst::__AM_RESTARTING;
1144 # Initialize our data structure
1145 $class->components( {} );
1147 $class->setup_components;
1149 if ( $class->debug ) {
1150 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1151 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1152 for my $comp ( sort keys %{ $class->components } ) {
1153 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1154 $t->row( $comp, $type );
1156 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1157 if ( keys %{ $class->components } );
1160 # Add our self to components, since we are also a component
1161 if( $class->isa('Catalyst::Controller') ){
1162 $class->components->{$class} = $class;
1165 $class->setup_actions;
1167 if ( $class->debug ) {
1168 my $name = $class->config->{name} || 'Application';
1169 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1172 # Make sure that the application class becomes immutable at this point,
1173 B::Hooks::EndOfScope::on_scope_end {
1175 my $meta = Class::MOP::get_metaclass_by_name($class);
1178 && ! { $meta->immutable_options }->{replace_constructor}
1180 $class->isa('Class::Accessor::Fast')
1181 || $class->isa('Class::Accessor')
1184 warn "You made your application class ($class) immutable, "
1185 . "but did not inline the\nconstructor. "
1186 . "This will break catalyst, as your app \@ISA "
1187 . "Class::Accessor(::Fast)?\nPlease pass "
1188 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1190 $meta->make_immutable(
1191 replace_constructor => 1,
1192 ) unless $meta->is_immutable;
1195 if ($class->config->{case_sensitive}) {
1196 $class->log->warn($class . "->config->{case_sensitive} is set.");
1197 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1200 $class->setup_finalize;
1201 # Should be the last thing we do so that user things hooking
1202 # setup_finalize can log..
1203 $class->log->_flush() if $class->log->can('_flush');
1204 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1207 =head2 $app->setup_finalize
1209 A hook to attach modifiers to. This method does not do anything except set the
1210 C<setup_finished> accessor.
1212 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1216 after setup_finalize => sub {
1224 sub setup_finalize {
1226 $class->setup_finished(1);
1229 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1231 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1233 Constructs an absolute L<URI> object based on the application root, the
1234 provided path, and the additional arguments and query parameters provided.
1235 When used as a string, provides a textual URI. If you need more flexibility
1236 than this (i.e. the option to provide relative URIs etc.) see
1237 L<Catalyst::Plugin::SmartURI>.
1239 If no arguments are provided, the URI for the current action is returned.
1240 To return the current action and also provide @args, use
1241 C<< $c->uri_for( $c->action, @args ) >>.
1243 If the first argument is a string, it is taken as a public URI path relative
1244 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1245 relative to the application root (if it does). It is then merged with
1246 C<< $c->request->base >>; any C<@args> are appended as additional path
1247 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1249 If the first argument is a L<Catalyst::Action> it represents an action which
1250 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1251 optional C<\@captures> argument (an arrayref) allows passing the captured
1252 variables that are needed to fill in the paths of Chained and Regex actions;
1253 once the path is resolved, C<uri_for> continues as though a path was
1254 provided, appending any arguments or parameters and creating an absolute
1257 The captures for the current request can be found in
1258 C<< $c->request->captures >>, and actions can be resolved using
1259 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1260 path, use C<< $c->uri_for_action >> instead.
1262 # Equivalent to $c->req->uri
1263 $c->uri_for($c->action, $c->req->captures,
1264 @{ $c->req->args }, $c->req->params);
1266 # For the Foo action in the Bar controller
1267 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1269 # Path to a static resource
1270 $c->uri_for('/static/images/logo.png');
1275 my ( $c, $path, @args ) = @_;
1277 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1278 $path = $path->path_prefix;
1283 undef($path) if (defined $path && $path eq '');
1286 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1288 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1289 foreach my $arg (@args) {
1290 utf8::encode($arg) if utf8::is_utf8($arg);
1291 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1294 if ( blessed($path) ) { # action object
1295 s|/|%2F|g for @args;
1296 my $captures = [ map { s|/|%2F|g; $_; }
1297 ( scalar @args && ref $args[0] eq 'ARRAY'
1301 foreach my $capture (@$captures) {
1302 utf8::encode($capture) if utf8::is_utf8($capture);
1303 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1307 # ->uri_for( $action, \@captures_and_args, \%query_values? )
1308 if( !@args && $action->number_of_args ) {
1309 my $expanded_action = $c->dispatcher->expand_action( $action );
1311 my $num_captures = $expanded_action->number_of_captures;
1312 unshift @args, splice @$captures, $num_captures;
1315 $path = $c->dispatcher->uri_for_action($action, $captures);
1316 if (not defined $path) {
1317 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1321 $path = '/' if $path eq '';
1324 unshift(@args, $path);
1326 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1327 my $namespace = $c->namespace;
1328 if (defined $path) { # cheesy hack to handle path '../foo'
1329 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1331 unshift(@args, $namespace || '');
1334 # join args with '/', or a blank string
1335 my $args = join('/', grep { defined($_) } @args);
1336 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1338 my $base = $c->req->base;
1339 my $class = ref($base);
1340 $base =~ s{(?<!/)$}{/};
1344 if (my @keys = keys %$params) {
1345 # somewhat lifted from URI::_query's query_form
1346 $query = '?'.join('&', map {
1347 my $val = $params->{$_};
1348 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1351 $val = '' unless defined $val;
1354 utf8::encode( $param ) if utf8::is_utf8($param);
1355 # using the URI::Escape pattern here so utf8 chars survive
1356 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1358 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1362 my $res = bless(\"${base}${args}${query}", $class);
1366 =head2 $c->uri_for_action( $path, \@captures_and_args?, @args?, \%query_values? )
1368 =head2 $c->uri_for_action( $action, \@captures_and_args?, @args?, \%query_values? )
1374 A private path to the Catalyst action you want to create a URI for.
1376 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1377 >> and passing the resulting C<$action> and the remaining arguments to C<<
1380 You can also pass in a Catalyst::Action object, in which case it is passed to
1383 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.
1385 For example, if the action looks like:
1387 package MyApp::Controller::Users;
1389 sub lst : Path('the-list') {}
1393 $c->uri_for_action('/users/lst')
1395 and it will create the URI /users/the-list.
1397 =item \@captures_and_args?
1399 Optional array reference of Captures (i.e. C<<CaptureArgs or $c->req->captures>)
1400 and arguments to the request. Usually used with L<Catalyst::DispatchType::Chained>
1401 to interpolate all the parameters in the URI.
1405 Optional list of extra arguments - can be supplied in the
1406 C<< \@captures_and_args? >> array ref, or here - whichever is easier for your
1409 Your action can have zero, a fixed or a variable number of args (e.g.
1410 C<< Args(1) >> for a fixed number or C<< Args() >> for a variable number)..
1412 =item \%query_values?
1414 Optional array reference of query parameters to append. E.g.
1420 /rest/of/your/uri?foo=bar
1426 sub uri_for_action {
1427 my ( $c, $path, @args ) = @_;
1428 my $action = blessed($path)
1430 : $c->dispatcher->get_action_by_path($path);
1431 unless (defined $action) {
1432 croak "Can't find action for path '$path'";
1434 return $c->uri_for( $action, @args );
1437 =head2 $c->welcome_message
1439 Returns the Catalyst welcome HTML page.
1443 sub welcome_message {
1445 my $name = $c->config->{name};
1446 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1447 my $prefix = Catalyst::Utils::appprefix( ref $c );
1448 $c->response->content_type('text/html; charset=utf-8');
1450 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1451 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1452 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1454 <meta http-equiv="Content-Language" content="en" />
1455 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1456 <title>$name on Catalyst $VERSION</title>
1457 <style type="text/css">
1460 background-color: #eee;
1467 margin-bottom: 10px;
1469 background-color: #ccc;
1470 border: 1px solid #aaa;
1475 font-family: verdana, tahoma, sans-serif;
1478 font-family: verdana, tahoma, sans-serif;
1481 text-decoration: none;
1483 border-bottom: 1px dotted #bbb;
1485 :link:hover, :visited:hover {
1498 background-color: #fff;
1499 border: 1px solid #aaa;
1503 font-weight: normal;
1525 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1530 <img src="$logo" alt="Catalyst Logo" />
1532 <p>Welcome to the world of Catalyst.
1533 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1534 framework will make web development something you had
1535 never expected it to be: Fun, rewarding, and quick.</p>
1536 <h2>What to do now?</h2>
1537 <p>That really depends on what <b>you</b> want to do.
1538 We do, however, provide you with a few starting points.</p>
1539 <p>If you want to jump right into web development with Catalyst
1540 you might want to start with a tutorial.</p>
1541 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1543 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1545 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1546 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1548 <h2>What to do next?</h2>
1549 <p>Next it's time to write an actual application. Use the
1550 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1551 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1552 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1553 they can save you a lot of work.</p>
1554 <pre><code>script/${prefix}_create.pl --help</code></pre>
1555 <p>Also, be sure to check out the vast and growing
1556 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1557 you are likely to find what you need there.
1561 <p>Catalyst has a very active community. Here are the main places to
1562 get in touch with us.</p>
1565 <a href="http://dev.catalyst.perl.org">Wiki</a>
1568 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1571 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1574 <h2>In conclusion</h2>
1575 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1576 as we enjoyed making it. Please contact us if you have ideas
1577 for improvement or other feedback.</p>
1587 Contains a hash of options passed from the application script, including
1588 the original ARGV the script received, the processed values from that
1589 ARGV and any extra arguments to the script which were not processed.
1591 This can be used to add custom options to your application's scripts
1592 and setup your application differently depending on the values of these
1595 =head1 INTERNAL METHODS
1597 These methods are not meant to be used by end users.
1599 =head2 $c->components
1601 Returns a hash of components.
1603 =head2 $c->context_class
1605 Returns or sets the context class.
1609 Returns a hashref containing coderefs and execution counts (needed for
1610 deep recursion detection).
1614 Returns the number of actions on the current internal execution stack.
1618 Dispatches a request to actions.
1622 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1624 =head2 $c->dispatcher_class
1626 Returns or sets the dispatcher class.
1628 =head2 $c->dump_these
1630 Returns a list of 2-element array references (name, structure) pairs
1631 that will be dumped on the error page in debug mode.
1637 [ Request => $c->req ],
1638 [ Response => $c->res ],
1639 [ Stash => $c->stash ],
1640 [ Config => $c->config ];
1643 =head2 $c->engine_class
1645 Returns or sets the engine class.
1647 =head2 $c->execute( $class, $coderef )
1649 Execute a coderef in given class and catch exceptions. Errors are available
1655 my ( $c, $class, $code ) = @_;
1656 $class = $c->component($class) || $class;
1659 if ( $c->depth >= $RECURSION ) {
1660 my $action = $code->reverse();
1661 $action = "/$action" unless $action =~ /->/;
1662 my $error = qq/Deep recursion detected calling "${action}"/;
1663 $c->log->error($error);
1669 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1671 push( @{ $c->stack }, $code );
1673 no warnings 'recursion';
1674 # N.B. This used to be combined, but I have seen $c get clobbered if so, and
1675 # I have no idea how, ergo $ret (which appears to fix the issue)
1676 eval { my $ret = $code->execute( $class, $c, @{ $c->req->args } ) || 0; $c->state( $ret ) };
1678 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1680 my $last = pop( @{ $c->stack } );
1682 if ( my $error = $@ ) {
1683 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1684 $error->rethrow if $c->depth > 1;
1686 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1687 $error->rethrow if $c->depth > 0;
1690 unless ( ref $error ) {
1691 no warnings 'uninitialized';
1693 my $class = $last->class;
1694 my $name = $last->name;
1695 $error = qq/Caught exception in $class->$name "$error"/;
1704 sub _stats_start_execute {
1705 my ( $c, $code ) = @_;
1706 my $appclass = ref($c) || $c;
1707 return if ( ( $code->name =~ /^_.*/ )
1708 && ( !$appclass->config->{show_internal_actions} ) );
1710 my $action_name = $code->reverse();
1711 $c->counter->{$action_name}++;
1713 my $action = $action_name;
1714 $action = "/$action" unless $action =~ /->/;
1716 # determine if the call was the result of a forward
1717 # this is done by walking up the call stack and looking for a calling
1718 # sub of Catalyst::forward before the eval
1720 for my $index ( 2 .. 11 ) {
1722 if ( ( caller($index) )[0] eq 'Catalyst'
1723 && ( caller($index) )[3] eq '(eval)' );
1725 if ( ( caller($index) )[3] =~ /forward$/ ) {
1726 $callsub = ( caller($index) )[3];
1727 $action = "-> $action";
1732 my $uid = $action_name . $c->counter->{$action_name};
1734 # is this a root-level call or a forwarded call?
1735 if ( $callsub =~ /forward$/ ) {
1736 my $parent = $c->stack->[-1];
1738 # forward, locate the caller
1739 if ( defined $parent && exists $c->counter->{"$parent"} ) {
1742 parent => "$parent" . $c->counter->{"$parent"},
1748 # forward with no caller may come from a plugin
1767 sub _stats_finish_execute {
1768 my ( $c, $info ) = @_;
1769 $c->stats->profile( end => $info );
1774 Finalizes the request.
1781 for my $error ( @{ $c->error } ) {
1782 $c->log->error($error);
1785 # Allow engine to handle finalize flow (for POE)
1786 my $engine = $c->engine;
1787 if ( my $code = $engine->can('finalize') ) {
1792 $c->finalize_uploads;
1795 if ( $#{ $c->error } >= 0 ) {
1799 $c->finalize_headers;
1802 if ( $c->request->method eq 'HEAD' ) {
1803 $c->response->body('');
1811 if ($c->use_stats) {
1812 my $elapsed = sprintf '%f', $c->stats->elapsed;
1813 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1815 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1818 return $c->response->status;
1821 =head2 $c->finalize_body
1827 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1829 =head2 $c->finalize_cookies
1835 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1837 =head2 $c->finalize_error
1843 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1845 =head2 $c->finalize_headers
1851 sub finalize_headers {
1854 my $response = $c->response; #accessor calls can add up?
1856 # Check if we already finalized headers
1857 return if $response->finalized_headers;
1860 if ( my $location = $response->redirect ) {
1861 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1862 $response->header( Location => $location );
1864 if ( !$response->has_body ) {
1865 # Add a default body if none is already present
1866 $response->body(<<"EOF");
1867 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
1868 <html xmlns="http://www.w3.org/1999/xhtml">
1870 <title>Moved</title>
1873 <p>This item has moved <a href="$location">here</a>.</p>
1877 $response->content_type('text/html; charset=utf-8');
1882 if ( defined $response->body && length $response->body && !$response->content_length ) {
1884 # get the length from a filehandle
1885 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1887 my $size = -s $response->body;
1889 $response->content_length( $size );
1892 $c->log->warn('Serving filehandle without a content-length');
1896 # everything should be bytes at this point, but just in case
1897 $response->content_length( length( $response->body ) );
1902 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1903 $response->headers->remove_header("Content-Length");
1904 $response->body('');
1907 $c->finalize_cookies;
1909 $c->engine->finalize_headers( $c, @_ );
1912 $response->finalized_headers(1);
1915 =head2 $c->finalize_output
1917 An alias for finalize_body.
1919 =head2 $c->finalize_read
1921 Finalizes the input after reading is complete.
1925 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1927 =head2 $c->finalize_uploads
1929 Finalizes uploads. Cleans up any temporary files.
1933 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1935 =head2 $c->get_action( $action, $namespace )
1937 Gets an action in a given namespace.
1941 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1943 =head2 $c->get_actions( $action, $namespace )
1945 Gets all actions of a given name in a namespace and all parent
1950 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1952 =head2 $app->handle_request( @arguments )
1954 Called to handle each HTTP request.
1958 sub handle_request {
1959 my ( $class, @arguments ) = @_;
1961 # Always expect worst case!
1964 if ($class->debug) {
1965 my $secs = time - $START || 1;
1966 my $av = sprintf '%.3f', $COUNT / $secs;
1967 my $time = localtime time;
1968 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1971 my $c = $class->prepare(@arguments);
1973 $status = $c->finalize;
1976 chomp(my $error = $_);
1977 $class->log->error(qq/Caught exception in engine "$error"/);
1982 if(my $coderef = $class->log->can('_flush')){
1983 $class->log->$coderef();
1988 =head2 $class->prepare( @arguments )
1990 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1997 predicate => '_has_uploadtmp',
2001 my ( $class, @arguments ) = @_;
2004 # After the app/ctxt split, this should become an attribute based on something passed
2005 # into the application.
2006 $class->context_class( ref $class || $class ) unless $class->context_class;
2008 my $uploadtmp = $class->config->{uploadtmp};
2009 my $c = $class->context_class->new({ $uploadtmp ? (_uploadtmp => $uploadtmp) : ()});
2011 # For on-demand data
2012 $c->request->_context($c);
2014 #surely this is not the most efficient way to do things...
2015 $c->stats($class->stats_class->new)->enable($c->use_stats);
2016 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
2017 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
2021 # Allow engine to direct the prepare flow (for POE)
2022 if ( my $prepare = $c->engine->can('prepare') ) {
2023 $c->engine->$prepare( $c, @arguments );
2026 $c->prepare_request(@arguments);
2027 $c->prepare_connection;
2028 $c->prepare_query_parameters;
2031 # Prepare the body for reading, either by prepare_body
2032 # or the user, if they are using $c->read
2035 # Parse the body unless the user wants it on-demand
2036 unless ( ref($c)->config->{parse_on_demand} ) {
2041 # VERY ugly and probably shouldn't rely on ->finalize actually working
2043 # failed prepare is always due to an invalid request, right?
2044 $c->response->status(400);
2045 $c->response->content_type('text/plain');
2046 $c->response->body('Bad Request');
2051 my $method = $c->req->method || '';
2052 my $path = $c->req->path;
2053 $path = '/' unless length $path;
2054 my $address = $c->req->address || '';
2063 =head2 $c->prepare_action
2065 Prepares action. See L<Catalyst::Dispatcher>.
2069 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
2071 =head2 $c->prepare_body
2073 Prepares message body.
2080 return if $c->request->_has_body;
2082 # Initialize on-demand data
2083 $c->engine->prepare_body( $c, @_ );
2084 $c->prepare_parameters;
2085 $c->prepare_uploads;
2088 =head2 $c->prepare_body_chunk( $chunk )
2090 Prepares a chunk of data before sending it to L<HTTP::Body>.
2092 See L<Catalyst::Engine>.
2096 sub prepare_body_chunk {
2098 $c->engine->prepare_body_chunk( $c, @_ );
2101 =head2 $c->prepare_body_parameters
2103 Prepares body parameters.
2107 sub prepare_body_parameters {
2109 $c->engine->prepare_body_parameters( $c, @_ );
2112 =head2 $c->prepare_connection
2114 Prepares connection.
2118 sub prepare_connection {
2120 # XXX - This is called on the engine (not the request) to maintain
2121 # Engine::PSGI back compat.
2122 $c->engine->prepare_connection($c);
2125 =head2 $c->prepare_parameters
2127 Prepares parameters.
2131 sub prepare_parameters {
2133 $c->prepare_body_parameters;
2134 $c->engine->prepare_parameters( $c, @_ );
2137 =head2 $c->prepare_path
2139 Prepares path and base.
2143 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2145 =head2 $c->prepare_query_parameters
2147 Prepares query parameters.
2151 sub prepare_query_parameters {
2154 $c->engine->prepare_query_parameters( $c, @_ );
2157 =head2 $c->log_request
2159 Writes information about the request to the debug logs. This includes:
2163 =item * Request method, path, and remote IP address
2165 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2167 =item * Request parameters
2169 =item * File uploads
2178 return unless $c->debug;
2180 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2181 my $request = $dump->[1];
2183 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2185 $path = '/' unless length $path;
2187 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2189 $c->log_request_headers($request->headers);
2191 if ( my $keywords = $request->query_keywords ) {
2192 $c->log->debug("Query keywords are: $keywords");
2195 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2197 $c->log_request_uploads($request);
2200 =head2 $c->log_response
2202 Writes information about the response to the debug logs by calling
2203 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2210 return unless $c->debug;
2212 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2213 my $response = $dump->[1];
2215 $c->log_response_status_line($response);
2216 $c->log_response_headers($response->headers);
2219 =head2 $c->log_response_status_line($response)
2221 Writes one line of information about the response to the debug logs. This includes:
2225 =item * Response status code
2227 =item * Content-Type header (if present)
2229 =item * Content-Length header (if present)
2235 sub log_response_status_line {
2236 my ($c, $response) = @_;
2240 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2241 $response->status || 'unknown',
2242 $response->headers->header('Content-Type') || 'unknown',
2243 $response->headers->header('Content-Length') || 'unknown'
2248 =head2 $c->log_response_headers($headers);
2250 Hook method which can be wrapped by plugins to log the response headers.
2251 No-op in the default implementation.
2255 sub log_response_headers {}
2257 =head2 $c->log_request_parameters( query => {}, body => {} )
2259 Logs request parameters to debug logs
2263 sub log_request_parameters {
2265 my %all_params = @_;
2267 return unless $c->debug;
2269 my $column_width = Catalyst::Utils::term_width() - 44;
2270 foreach my $type (qw(query body)) {
2271 my $params = $all_params{$type};
2272 next if ! keys %$params;
2273 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2274 for my $key ( sort keys %$params ) {
2275 my $param = $params->{$key};
2276 my $value = defined($param) ? $param : '';
2277 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2279 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2283 =head2 $c->log_request_uploads
2285 Logs file uploads included in the request to the debug logs.
2286 The parameter name, filename, file type, and file size are all included in
2291 sub log_request_uploads {
2293 my $request = shift;
2294 return unless $c->debug;
2295 my $uploads = $request->uploads;
2296 if ( keys %$uploads ) {
2297 my $t = Text::SimpleTable->new(
2298 [ 12, 'Parameter' ],
2303 for my $key ( sort keys %$uploads ) {
2304 my $upload = $uploads->{$key};
2305 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2306 $t->row( $key, $u->filename, $u->type, $u->size );
2309 $c->log->debug( "File Uploads are:\n" . $t->draw );
2313 =head2 $c->log_request_headers($headers);
2315 Hook method which can be wrapped by plugins to log the request headers.
2316 No-op in the default implementation.
2320 sub log_request_headers {}
2322 =head2 $c->log_headers($type => $headers)
2324 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2331 my $headers = shift; # an HTTP::Headers instance
2333 return unless $c->debug;
2335 my $column_width = Catalyst::Utils::term_width() - 28;
2336 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2339 my ( $name, $value ) = @_;
2340 $t->row( $name, $value );
2343 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2347 =head2 $c->prepare_read
2349 Prepares the input for reading.
2353 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2355 =head2 $c->prepare_request
2357 Prepares the engine request.
2361 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2363 =head2 $c->prepare_uploads
2369 sub prepare_uploads {
2372 $c->engine->prepare_uploads( $c, @_ );
2375 =head2 $c->prepare_write
2377 Prepares the output for writing.
2381 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2383 =head2 $c->request_class
2385 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2387 =head2 $c->response_class
2389 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2391 =head2 $c->read( [$maxlength] )
2393 Reads a chunk of data from the request body. This method is designed to
2394 be used in a while loop, reading C<$maxlength> bytes on every call.
2395 C<$maxlength> defaults to the size of the request if not specified.
2397 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2400 Warning: If you use read(), Catalyst will not process the body,
2401 so you will not be able to access POST parameters or file uploads via
2402 $c->request. You must handle all body parsing yourself.
2406 sub read { my $c = shift; return $c->request->read( @_ ) }
2416 $app->engine_loader->needs_psgi_engine_compat_hack ?
2417 $app->engine->run($app, @_) :
2418 $app->engine->run( $app, $app->_finalized_psgi_app, @_ );
2421 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2423 Sets an action in a given namespace.
2427 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2429 =head2 $c->setup_actions($component)
2431 Sets up actions for a component.
2435 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2437 =head2 $c->setup_components
2439 This method is called internally to set up the application's components.
2441 It finds modules by calling the L<locate_components> method, expands them to
2442 package names with the L<expand_component_module> method, and then installs
2443 each component into the application.
2445 The C<setup_components> config option is passed to both of the above methods.
2447 Installation of each component is performed by the L<setup_component> method,
2452 sub setup_components {
2455 my $config = $class->config->{ setup_components };
2457 my @comps = $class->locate_components($config);
2458 my %comps = map { $_ => 1 } @comps;
2460 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2461 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2462 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2463 ) if $deprecatedcatalyst_component_names;
2465 for my $component ( @comps ) {
2467 # We pass ignore_loaded here so that overlay files for (e.g.)
2468 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2469 # we know M::P::O found a file on disk so this is safe
2471 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2474 for my $component (@comps) {
2475 my $instance = $class->components->{ $component } = $class->setup_component($component);
2476 my @expanded_components = $instance->can('expand_modules')
2477 ? $instance->expand_modules( $component, $config )
2478 : $class->expand_component_module( $component, $config );
2479 for my $component (@expanded_components) {
2480 next if $comps{$component};
2481 $class->components->{ $component } = $class->setup_component($component);
2486 =head2 $c->locate_components( $setup_component_config )
2488 This method is meant to provide a list of component modules that should be
2489 setup for the application. By default, it will use L<Module::Pluggable>.
2491 Specify a C<setup_components> config option to pass additional options directly
2492 to L<Module::Pluggable>. To add additional search paths, specify a key named
2493 C<search_extra> as an array reference. Items in the array beginning with C<::>
2494 will have the application class name prepended to them.
2498 sub locate_components {
2502 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2503 my $extra = delete $config->{ search_extra } || [];
2505 push @paths, @$extra;
2507 my $locator = Module::Pluggable::Object->new(
2508 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2512 # XXX think about ditching this sort entirely
2513 my @comps = sort { length $a <=> length $b } $locator->plugins;
2518 =head2 $c->expand_component_module( $component, $setup_component_config )
2520 Components found by C<locate_components> will be passed to this method, which
2521 is expected to return a list of component (package) names to be set up.
2525 sub expand_component_module {
2526 my ($class, $module) = @_;
2527 return Devel::InnerPackage::list_packages( $module );
2530 =head2 $c->setup_component
2534 sub setup_component {
2535 my( $class, $component ) = @_;
2537 unless ( $component->can( 'COMPONENT' ) ) {
2541 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2542 my $config = $class->config->{ $suffix } || {};
2543 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2544 # methods also pass it. local to avoid pointlessly shitting in config
2545 # for the debug screen, as $component is already the key name.
2546 local $config->{catalyst_component_name} = $component;
2548 my $instance = eval { $component->COMPONENT( $class, $config ); };
2550 if ( my $error = $@ ) {
2552 Catalyst::Exception->throw(
2553 message => qq/Couldn't instantiate component "$component", "$error"/
2557 unless (blessed $instance) {
2558 my $metaclass = Moose::Util::find_meta($component);
2559 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2560 my $component_method_from = $method_meta->associated_metaclass->name;
2561 my $value = defined($instance) ? $instance : 'undef';
2562 Catalyst::Exception->throw(
2564 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2570 =head2 $c->setup_dispatcher
2576 sub setup_dispatcher {
2577 my ( $class, $dispatcher ) = @_;
2580 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2583 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2584 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2587 unless ($dispatcher) {
2588 $dispatcher = $class->dispatcher_class;
2591 Class::MOP::load_class($dispatcher);
2593 # dispatcher instance
2594 $class->dispatcher( $dispatcher->new );
2597 =head2 $c->setup_engine
2604 my ($class, $requested_engine) = @_;
2606 if (!$class->engine_loader || $requested_engine) {
2607 $class->engine_loader(
2608 Catalyst::EngineLoader->new({
2609 application_name => $class,
2610 (defined $requested_engine
2611 ? (catalyst_engine_class => $requested_engine) : ()),
2616 $class->engine_loader->catalyst_engine_class;
2620 my ($class, $requested_engine) = @_;
2623 my $loader = $class->engine_loader;
2625 if (!$loader || $requested_engine) {
2626 $loader = Catalyst::EngineLoader->new({
2627 application_name => $class,
2628 (defined $requested_engine
2629 ? (requested_engine => $requested_engine) : ()),
2632 $class->engine_loader($loader);
2635 $loader->catalyst_engine_class;
2638 # Don't really setup_engine -- see _setup_psgi_app for explanation.
2639 return if $class->loading_psgi_file;
2641 Class::MOP::load_class($engine);
2643 if ($ENV{MOD_PERL}) {
2644 my $apache = $class->engine_loader->auto;
2646 my $meta = find_meta($class);
2647 my $was_immutable = $meta->is_immutable;
2648 my %immutable_options = $meta->immutable_options;
2649 $meta->make_mutable if $was_immutable;
2651 $meta->add_method(handler => sub {
2653 my $psgi_app = $class->_finalized_psgi_app;
2654 $apache->call_app($r, $psgi_app);
2657 $meta->make_immutable(%immutable_options) if $was_immutable;
2660 $class->engine( $engine->new );
2665 sub _finalized_psgi_app {
2668 unless ($app->_psgi_app) {
2669 my $psgi_app = $app->_setup_psgi_app;
2670 $app->_psgi_app($psgi_app);
2673 return $app->_psgi_app;
2676 sub _setup_psgi_app {
2679 for my $home (Path::Class::Dir->new($app->config->{home})) {
2680 my $psgi_file = $home->file(
2681 Catalyst::Utils::appprefix($app) . '.psgi',
2684 next unless -e $psgi_file;
2686 # If $psgi_file calls ->setup_engine, it's doing so to load
2687 # Catalyst::Engine::PSGI. But if it does that, we're only going to
2688 # throw away the loaded PSGI-app and load the 5.9 Catalyst::Engine
2689 # anyway. So set a flag (ick) that tells setup_engine not to populate
2690 # $c->engine or do any other things we might regret.
2692 $app->loading_psgi_file(1);
2693 my $psgi_app = Plack::Util::load_psgi($psgi_file);
2694 $app->loading_psgi_file(0);
2697 unless $app->engine_loader->needs_psgi_engine_compat_hack;
2700 Found a legacy Catalyst::Engine::PSGI .psgi file at ${psgi_file}.
2702 Its content has been ignored. Please consult the Catalyst::Upgrading
2703 documentation on how to upgrade from Catalyst::Engine::PSGI.
2707 return $app->apply_default_middlewares($app->psgi_app);
2710 =head2 $c->apply_default_middlewares
2712 Adds the following L<Plack> middlewares to your application, since they are
2713 useful and commonly needed:
2715 L<Plack::Middleware::ReverseProxy>, (conditionally added based on the status
2716 of your $ENV{REMOTE_ADDR}, and can be forced on with C<using_frontend_proxy>
2717 or forced off with C<ignore_frontend_proxy>), L<Plack::Middleware::LighttpdScriptNameFix>
2718 (if you are using Lighttpd), L<Plack::Middleware::IIS6ScriptNameFix> (always
2719 applied since this middleware is smart enough to conditionally apply itself).
2721 Additionally if we detect we are using Nginx, we add a bit of custom middleware
2722 to solve some problems with the way that server handles $ENV{PATH_INFO} and
2728 sub apply_default_middlewares {
2729 my ($app, $psgi_app) = @_;
2731 $psgi_app = Plack::Middleware::Conditional->wrap(
2733 builder => sub { Plack::Middleware::ReverseProxy->wrap($_[0]) },
2736 return if $app->config->{ignore_frontend_proxy};
2737 return $env->{REMOTE_ADDR} eq '127.0.0.1'
2738 || $app->config->{using_frontend_proxy};
2742 # If we're running under Lighttpd, swap PATH_INFO and SCRIPT_NAME
2743 # http://lists.scsys.co.uk/pipermail/catalyst/2006-June/008361.html
2744 $psgi_app = Plack::Middleware::LighttpdScriptNameFix->wrap($psgi_app);
2746 # we're applying this unconditionally as the middleware itself already makes
2747 # sure it doesn't fuck things up if it's not running under one of the right
2749 $psgi_app = Plack::Middleware::IIS6ScriptNameFix->wrap($psgi_app);
2756 Returns a PSGI application code reference for the catalyst application
2757 C<$c>. This is the bare application without any middlewares
2758 applied. C<${myapp}.psgi> is not taken into account.
2760 This is what you want to be using to retrieve the PSGI application code
2761 reference of your Catalyst application for use in F<.psgi> files.
2767 return $app->engine->build_psgi_app($app);
2770 =head2 $c->setup_home
2772 Sets up the home directory.
2777 my ( $class, $home ) = @_;
2779 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2783 $home ||= Catalyst::Utils::home($class);
2786 #I remember recently being scolded for assigning config values like this
2787 $class->config->{home} ||= $home;
2788 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2792 =head2 $c->setup_log
2794 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2795 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2798 This method also installs a C<debug> method that returns a true value into the
2799 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2800 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2802 Note that if the log has already been setup, by either a previous call to
2803 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2804 that this method won't actually set up the log object.
2809 my ( $class, $levels ) = @_;
2812 $levels =~ s/^\s+//;
2813 $levels =~ s/\s+$//;
2814 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2816 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2817 if ( defined $env_debug ) {
2818 $levels{debug} = 1 if $env_debug; # Ugly!
2819 delete($levels{debug}) unless $env_debug;
2822 unless ( $class->log ) {
2823 $class->log( Catalyst::Log->new(keys %levels) );
2826 if ( $levels{debug} ) {
2827 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2828 $class->log->debug('Debug messages enabled');
2832 =head2 $c->setup_plugins
2838 =head2 $c->setup_stats
2840 Sets up timing statistics class.
2845 my ( $class, $stats ) = @_;
2847 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2849 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2850 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2851 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2852 $class->log->debug('Statistics enabled');
2857 =head2 $c->registered_plugins
2859 Returns a sorted list of the plugins which have either been stated in the
2862 If passed a given plugin name, it will report a boolean value indicating
2863 whether or not that plugin is loaded. A fully qualified name is required if
2864 the plugin name does not begin with C<Catalyst::Plugin::>.
2866 if ($c->registered_plugins('Some::Plugin')) {
2874 sub registered_plugins {
2876 return sort keys %{ $proto->_plugins } unless @_;
2878 return 1 if exists $proto->_plugins->{$plugin};
2879 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2882 sub _register_plugin {
2883 my ( $proto, $plugin, $instant ) = @_;
2884 my $class = ref $proto || $proto;
2886 Class::MOP::load_class( $plugin );
2887 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2888 if $plugin->isa( 'Catalyst::Component' );
2889 $proto->_plugins->{$plugin} = 1;
2891 my $meta = Class::MOP::get_metaclass_by_name($class);
2892 $meta->superclasses($plugin, $meta->superclasses);
2898 my ( $class, $plugins ) = @_;
2900 $class->_plugins( {} ) unless $class->_plugins;
2901 $plugins = Data::OptList::mkopt($plugins || []);
2904 [ Catalyst::Utils::resolve_namespace(
2905 $class . '::Plugin',
2906 'Catalyst::Plugin', $_->[0]
2912 for my $plugin ( reverse @plugins ) {
2913 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2914 my $meta = find_meta($plugin->[0]);
2915 next if $meta && $meta->isa('Moose::Meta::Role');
2917 $class->_register_plugin($plugin->[0]);
2921 map { $_->[0]->name, $_->[1] }
2922 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2923 map { [find_meta($_->[0]), $_->[1]] }
2926 Moose::Util::apply_all_roles(
2934 Returns an arrayref of the internal execution stack (actions that are
2935 currently executing).
2939 Returns the current timing statistics object. By default Catalyst uses
2940 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2941 L<< stats_class|/"$c->stats_class" >>.
2943 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2944 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2945 profile explicitly, although MyApp.pm still won't profile nor output anything
2948 =head2 $c->stats_class
2950 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2952 =head2 $c->use_stats
2954 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2956 Note that this is a static method, not an accessor and should be overridden
2957 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2964 =head2 $c->write( $data )
2966 Writes $data to the output stream. When using this method directly, you
2967 will need to manually set the C<Content-Length> header to the length of
2968 your output data, if known.
2975 return $c->response->write( @_ );
2980 Returns the Catalyst version number. Mostly useful for "powered by"
2981 messages in template systems.
2985 sub version { return $Catalyst::VERSION }
2987 =head1 CONFIGURATION
2989 There are a number of 'base' config variables which can be set:
2995 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
2999 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
3003 C<disable_component_resolution_regex_fallback> - Turns
3004 off the deprecated component resolution functionality so
3005 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
3006 are called then regex search will not be attempted on string values and
3007 instead C<undef> will be returned.
3011 C<home> - The application home directory. In an uninstalled application,
3012 this is the top level application directory. In an installed application,
3013 this will be the directory containing C<< MyApp.pm >>.
3017 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
3021 C<name> - The name of the application in debug messages and the debug and
3026 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
3027 until it is accessed. This allows you to (for example) check authentication (and reject
3028 the upload) before actually receiving all the data. See L</ON-DEMAND PARSER>
3032 C<root> - The root directory for templates. Usually this is just a
3033 subdirectory of the home directory, but you can set it to change the
3034 templates to a different directory.
3038 C<search_extra> - Array reference passed to Module::Pluggable to for additional
3039 namespaces from which components will be loaded (and constructed and stored in
3040 C<< $c->components >>).
3044 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
3045 to be shown in hit debug tables in the test server.
3049 C<use_request_uri_for_path> - Controls if the C<REQUEST_URI> or C<PATH_INFO> environment
3050 variable should be used for determining the request path.
3052 Most web server environments pass the requested path to the application using environment variables,
3053 from which Catalyst has to reconstruct the request base (i.e. the top level path to / in the application,
3054 exposed as C<< $c->request->base >>) and the request path below that base.
3056 There are two methods of doing this, both of which have advantages and disadvantages. Which method is used
3057 is determined by the C<< $c->config(use_request_uri_for_path) >> setting (which can either be true or false).
3061 =item use_request_uri_for_path => 0
3063 This is the default (and the) traditional method that Catalyst has used for determining the path information.
3064 The path is generated from a combination of the C<PATH_INFO> and C<SCRIPT_NAME> environment variables.
3065 The allows the application to behave correctly when C<mod_rewrite> is being used to redirect requests
3066 into the application, as these variables are adjusted by mod_rewrite to take account for the redirect.
3068 However this method has the major disadvantage that it is impossible to correctly decode some elements
3069 of the path, as RFC 3875 says: "C<< Unlike a URI path, the PATH_INFO is not URL-encoded, and cannot
3070 contain path-segment parameters. >>" This means PATH_INFO is B<always> decoded, and therefore Catalyst
3071 can't distinguish / vs %2F in paths (in addition to other encoded values).
3073 =item use_request_uri_for_path => 1
3075 This method uses the C<REQUEST_URI> and C<SCRIPT_NAME> environment variables. As C<REQUEST_URI> is never
3076 decoded, this means that applications using this mode can correctly handle URIs including the %2F character
3077 (i.e. with C<AllowEncodedSlashes> set to C<On> in Apache).
3079 Given that this method of path resolution is provably more correct, it is recommended that you use
3080 this unless you have a specific need to deploy your application in a non-standard environment, and you are
3081 aware of the implications of not being able to handle encoded URI paths correctly.
3083 However it also means that in a number of cases when the app isn't installed directly at a path, but instead
3084 is having paths rewritten into it (e.g. as a .cgi/fcgi in a public_html directory, with mod_rewrite in a
3085 .htaccess file, or when SSI is used to rewrite pages into the app, or when sub-paths of the app are exposed
3086 at other URIs than that which the app is 'normally' based at with C<mod_rewrite>), the resolution of
3087 C<< $c->request->base >> will be incorrect.
3093 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
3097 =head1 INTERNAL ACTIONS
3099 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
3100 C<_ACTION>, and C<_END>. These are by default not shown in the private
3101 action table, but you can make them visible with a config parameter.
3103 MyApp->config(show_internal_actions => 1);
3105 =head1 ON-DEMAND PARSER
3107 The request body is usually parsed at the beginning of a request,
3108 but if you want to handle input yourself, you can enable on-demand
3109 parsing with a config parameter.
3111 MyApp->config(parse_on_demand => 1);
3113 =head1 PROXY SUPPORT
3115 Many production servers operate using the common double-server approach,
3116 with a lightweight frontend web server passing requests to a larger
3117 backend server. An application running on the backend server must deal
3118 with two problems: the remote user always appears to be C<127.0.0.1> and
3119 the server's hostname will appear to be C<localhost> regardless of the
3120 virtual host that the user connected through.
3122 Catalyst will automatically detect this situation when you are running
3123 the frontend and backend servers on the same machine. The following
3124 changes are made to the request.
3126 $c->req->address is set to the user's real IP address, as read from
3127 the HTTP X-Forwarded-For header.
3129 The host value for $c->req->base and $c->req->uri is set to the real
3130 host, as read from the HTTP X-Forwarded-Host header.
3132 Additionally, you may be running your backend application on an insecure
3133 connection (port 80) while your frontend proxy is running under SSL. If there
3134 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
3135 tell Catalyst what port the frontend listens on. This will allow all URIs to
3136 be created properly.
3138 In the case of passing in:
3140 X-Forwarded-Port: 443
3142 All calls to C<uri_for> will result in an https link, as is expected.
3144 Obviously, your web server must support these headers for this to work.
3146 In a more complex server farm environment where you may have your
3147 frontend proxy server(s) on different machines, you will need to set a
3148 configuration option to tell Catalyst to read the proxied data from the
3151 MyApp->config(using_frontend_proxy => 1);
3153 If you do not wish to use the proxy support at all, you may set:
3155 MyApp->config(ignore_frontend_proxy => 0);
3157 =head2 Note about psgi files
3159 Note that if you supply your own .psgi file, calling
3160 C<< MyApp->psgi_app(@_); >>, then B<this will not happen automatically>.
3162 You either need to apply L<Plack::Middleware::ReverseProxy> yourself
3163 in your psgi, for example:
3166 enable "Plack::Middleware::ReverseProxy";
3170 This will unconditionally add the ReverseProxy support, or you need to call
3171 C<< $app = MyApp->apply_default_middlewares($app) >> (to conditionally
3172 apply the support depending upon your config).
3174 See L<Catalyst::PSGI> for more information.
3176 =head1 THREAD SAFETY
3178 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3179 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3180 believe the Catalyst core to be thread-safe.
3182 If you plan to operate in a threaded environment, remember that all other
3183 modules you are using must also be thread-safe. Some modules, most notably
3184 L<DBD::SQLite>, are not thread-safe.
3190 Join #catalyst on irc.perl.org.
3194 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3195 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3199 http://catalyst.perl.org
3203 http://dev.catalyst.perl.org
3207 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3209 =head2 L<Catalyst::Manual> - The Catalyst Manual
3211 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3213 =head2 L<Catalyst::Engine> - Core engine
3215 =head2 L<Catalyst::Log> - Log class.
3217 =head2 L<Catalyst::Request> - Request object
3219 =head2 L<Catalyst::Response> - Response object
3221 =head2 L<Catalyst::Test> - The test suite.
3225 =head1 PROJECT FOUNDER
3227 sri: Sebastian Riedel <sri@cpan.org>
3233 acme: Leon Brocard <leon@astray.com>
3235 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3239 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3243 andyg: Andy Grundman <andy@hybridized.org>
3245 audreyt: Audrey Tang
3247 bricas: Brian Cassidy <bricas@cpan.org>
3249 Caelum: Rafael Kitover <rkitover@io.com>
3251 chansen: Christian Hansen
3253 chicks: Christopher Hicks
3255 Chisel Wright C<pause@herlpacker.co.uk>
3257 Danijel Milicevic C<me@danijel.de>
3259 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3261 David Naughton, C<naughton@umn.edu>
3265 dhoss: Devin Austin <dhoss@cpan.org>
3267 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3271 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3273 esskar: Sascha Kiefer
3275 fireartist: Carl Franks <cfranks@cpan.org>
3277 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3279 gabb: Danijel Milicevic
3283 Gavin Henry C<ghenry@perl.me.uk>
3287 groditi: Guillermo Roditi <groditi@gmail.com>
3289 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3291 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3293 jcamacho: Juan Camacho
3295 jester: Jesse Sheidlower C<jester@panix.com>
3297 jhannah: Jay Hannah <jay@jays.net>
3303 jon: Jon Schutz <jjschutz@cpan.org>
3305 Jonathan Rockway C<< <jrockway@cpan.org> >>
3307 Kieren Diment C<kd@totaldatasolution.com>
3309 konobi: Scott McWhirter <konobi@cpan.org>
3311 marcus: Marcus Ramberg <mramberg@cpan.org>
3313 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3315 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3319 naughton: David Naughton
3321 ningu: David Kamholz <dkamholz@cpan.org>
3323 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3325 numa: Dan Sully <daniel@cpan.org>
3331 omega: Andreas Marienborg
3333 Oleg Kostyuk <cub.uanic@gmail.com>
3335 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3337 rafl: Florian Ragwitz <rafl@debian.org>
3339 random: Roland Lammel <lammel@cpan.org>
3341 Robert Sedlacek C<< <rs@474.at> >>
3343 SpiceMan: Marcel Montes
3347 szbalint: Balint Szilakszi <szbalint@cpan.org>
3349 t0m: Tomas Doran <bobtfish@bobtfish.net>
3353 Viljo Marrandi C<vilts@yahoo.com>
3355 Will Hawes C<info@whawes.co.uk>
3357 willert: Sebastian Willert <willert@cpan.org>
3359 wreis: Wallace Reis <wallace@reis.org.br>
3361 Yuval Kogman, C<nothingmuch@woobling.org>
3363 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3365 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3371 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3375 This library is free software. You can redistribute it and/or modify it under
3376 the same terms as Perl itself.
3382 __PACKAGE__->meta->make_immutable;