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 run_options/;
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 = '5.90007';
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 : Chained('/') Args() { # 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 : Chained('/') PathPart('/bar/of/soap') Args() { ... }
171 # called after all actions are finished
173 my ( $self, $c ) = @_;
174 if ( scalar @{ $c->error } ) { ... } # handle errors
175 return if $c->res->body; # already have a response
176 $c->forward( 'MyApp::View::TT' ); # render template
179 See L<Catalyst::Manual::Intro> for additional information.
183 Catalyst is a modern framework for making web applications without the
184 pain usually associated with this process. This document is a reference
185 to the main Catalyst application. If you are a new user, we suggest you
186 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
188 See L<Catalyst::Manual> for more documentation.
190 Catalyst plugins can be loaded by naming them as arguments to the "use
191 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
192 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
195 use Catalyst qw/My::Module/;
197 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
198 fully qualify the name by using a unary plus:
202 +Fully::Qualified::Plugin::Name
205 Special flags like C<-Debug> can also be specified as
206 arguments when Catalyst is loaded:
208 use Catalyst qw/-Debug My::Module/;
210 The position of plugins and flags in the chain is important, because
211 they are loaded in the order in which they appear.
213 The following flags are supported:
217 Enables debug output. You can also force this setting from the system
218 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
219 settings override the application, with <MYAPP>_DEBUG having the highest
222 This sets the log level to 'debug' and enables full debug output on the
223 error screen. If you only want the latter, see L<< $c->debug >>.
227 Forces Catalyst to use a specific home directory, e.g.:
229 use Catalyst qw[-Home=/usr/mst];
231 This can also be done in the shell environment by setting either the
232 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
233 is replaced with the uppercased name of your application, any "::" in
234 the name will be replaced with underscores, e.g. MyApp::Web should use
235 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
237 If none of these are set, Catalyst will attempt to automatically detect the
238 home directory. If you are working in a development environment, Catalyst
239 will try and find the directory containing either Makefile.PL, Build.PL or
240 dist.ini. If the application has been installed into the system (i.e.
241 you have done C<make install>), then Catalyst will use the path to your
242 application module, without the .pm extension (e.g., /foo/MyApp if your
243 application was installed at /foo/MyApp.pm)
247 use Catalyst '-Log=warn,fatal,error';
249 Specifies a comma-delimited list of log levels.
253 Enables statistics collection and reporting.
255 use Catalyst qw/-Stats=1/;
257 You can also force this setting from the system environment with CATALYST_STATS
258 or <MYAPP>_STATS. The environment settings override the application, with
259 <MYAPP>_STATS having the highest priority.
261 Stats are also enabled if L<< debugging |/"-Debug" >> is enabled.
265 =head2 INFORMATION ABOUT THE CURRENT REQUEST
269 Returns a L<Catalyst::Action> object for the current action, which
270 stringifies to the action name. See L<Catalyst::Action>.
274 Returns the namespace of the current action, i.e., the URI prefix
275 corresponding to the controller of the current action. For example:
277 # in Controller::Foo::Bar
278 $c->namespace; # returns 'foo/bar';
284 Returns the current L<Catalyst::Request> object, giving access to
285 information about the current client request (including parameters,
286 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
288 =head2 REQUEST FLOW HANDLING
290 =head2 $c->forward( $action [, \@arguments ] )
292 =head2 $c->forward( $class, $method, [, \@arguments ] )
294 Forwards processing to another action, by its private name. If you give a
295 class name but no method, C<process()> is called. You may also optionally
296 pass arguments in an arrayref. The action will receive the arguments in
297 C<@_> and C<< $c->req->args >>. Upon returning from the function,
298 C<< $c->req->args >> will be restored to the previous values.
300 Any data C<return>ed from the action forwarded to, will be returned by the
303 my $foodata = $c->forward('/foo');
304 $c->forward('index');
305 $c->forward(qw/Model::DBIC::Foo do_stuff/);
306 $c->forward('View::TT');
308 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
309 an C<< eval { } >> around the call (actually
310 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus rendering all
311 exceptions thrown by the called action non-fatal and pushing them onto
312 $c->error instead. If you want C<die> to propagate you need to do something
316 die join "\n", @{ $c->error } if @{ $c->error };
318 Or make sure to always return true values from your actions and write
321 $c->forward('foo') || return;
323 Another note is that C<< $c->forward >> always returns a scalar because it
324 actually returns $c->state which operates in a scalar context.
325 Thus, something like:
329 in an action that is forwarded to is going to return a scalar,
330 i.e. how many items are in that array, which is probably not what you want.
331 If you need to return an array then return a reference to it,
334 $c->stash->{array} = \@array;
336 and access it from the stash.
338 Keep in mind that the C<end> method used is that of the caller action. So a C<$c-E<gt>detach> inside a forwarded action would run the C<end> method from the original action requested.
342 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
344 =head2 $c->detach( $action [, \@arguments ] )
346 =head2 $c->detach( $class, $method, [, \@arguments ] )
350 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
351 doesn't return to the previous action when processing is finished.
353 When called with no arguments it escapes the processing chain entirely.
357 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
359 =head2 $c->visit( $action [, \@captures, \@arguments ] )
361 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
363 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
364 but does a full dispatch, instead of just calling the new C<$action> /
365 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
366 you go to are called, just like a new request.
368 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
369 This means, for example, that C<< $c->action >> methods such as
370 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
371 L<reverse|Catalyst::Action/reverse> return information for the visited action
372 when they are invoked within the visited action. This is different from the
373 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
374 continues to use the $c->action object from the caller action even when
375 invoked from the called action.
377 C<< $c->stash >> is kept unchanged.
379 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
380 allows you to "wrap" another action, just as it would have been called by
381 dispatching from a URL, while the analogous
382 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
383 transfer control to another action as if it had been reached directly from a URL.
387 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
389 =head2 $c->go( $action [, \@captures, \@arguments ] )
391 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
393 The relationship between C<go> and
394 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
395 the relationship between
396 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
397 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
398 C<< $c->go >> will perform a full dispatch on the specified action or method,
399 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
400 C<go> escapes the processing of the current request chain on completion, and
401 does not return to its caller.
403 @arguments are arguments to the final destination of $action. @captures are
404 arguments to the intermediate steps, if any, on the way to the final sub of
409 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
415 Returns the current L<Catalyst::Response> object, see there for details.
419 Returns a hashref to the stash, which may be used to store data and pass
420 it between components during a request. You can also set hash keys by
421 passing arguments. The stash is automatically sent to the view. The
422 stash is cleared at the end of a request; it cannot be used for
423 persistent storage (for this you must use a session; see
424 L<Catalyst::Plugin::Session> for a complete system integrated with
427 $c->stash->{foo} = $bar;
428 $c->stash( { moose => 'majestic', qux => 0 } );
429 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
431 # stash is automatically passed to the view for use in a template
432 $c->forward( 'MyApp::View::TT' );
436 around stash => sub {
439 my $stash = $orig->($c);
441 my $new_stash = @_ > 1 ? {@_} : $_[0];
442 croak('stash takes a hash or hashref') unless ref $new_stash;
443 foreach my $key ( keys %$new_stash ) {
444 $stash->{$key} = $new_stash->{$key};
454 =head2 $c->error($error, ...)
456 =head2 $c->error($arrayref)
458 Returns an arrayref containing error messages. If Catalyst encounters an
459 error while processing a request, it stores the error in $c->error. This
460 method should only be used to store fatal error messages.
462 my @error = @{ $c->error };
466 $c->error('Something bad happened');
473 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
474 croak @$error unless ref $c;
475 push @{ $c->{error} }, @$error;
477 elsif ( defined $_[0] ) { $c->{error} = undef }
478 return $c->{error} || [];
484 Contains the return value of the last executed action.
485 Note that << $c->state >> operates in a scalar context which means that all
486 values it returns are scalar.
488 =head2 $c->clear_errors
490 Clear errors. You probably don't want to clear the errors unless you are
491 implementing a custom error screen.
493 This is equivalent to running
504 sub _comp_search_prefixes {
506 return map $c->components->{ $_ }, $c->_comp_names_search_prefixes(@_);
509 # search components given a name and some prefixes
510 sub _comp_names_search_prefixes {
511 my ( $c, $name, @prefixes ) = @_;
512 my $appclass = ref $c || $c;
513 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
514 $filter = qr/$filter/; # Compile regex now rather than once per loop
516 # map the original component name to the sub part that we will search against
517 my %eligible = map { my $n = $_; $n =~ s{^$appclass\::[^:]+::}{}; $_ => $n; }
518 grep { /$filter/ } keys %{ $c->components };
520 # undef for a name will return all
521 return keys %eligible if !defined $name;
523 my $query = ref $name ? $name : qr/^$name$/i;
524 my @result = grep { $eligible{$_} =~ m{$query} } keys %eligible;
526 return @result if @result;
528 # if we were given a regexp to search against, we're done.
531 # skip regexp fallback if configured
533 if $appclass->config->{disable_component_resolution_regex_fallback};
537 @result = grep { $eligible{ $_ } =~ m{$query} } keys %eligible;
539 # no results? try against full names
541 @result = grep { m{$query} } keys %eligible;
544 # don't warn if we didn't find any results, it just might not exist
546 # Disgusting hack to work out correct method name
547 my $warn_for = lc $prefixes[0];
548 my $msg = "Used regexp fallback for \$c->${warn_for}('${name}'), which found '" .
549 (join '", "', @result) . "'. Relying on regexp fallback behavior for " .
550 "component resolution is unreliable and unsafe.";
551 my $short = $result[0];
552 # remove the component namespace prefix
553 $short =~ s/.*?(Model|Controller|View):://;
554 my $shortmess = Carp::shortmess('');
555 if ($shortmess =~ m#Catalyst/Plugin#) {
556 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
558 } elsif ($shortmess =~ m#Catalyst/lib/(View|Controller)#) {
559 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
560 "component's config";
562 $msg .= " You probably meant \$c->${warn_for}('$short') instead of \$c->${warn_for}('${name}'), " .
563 "but if you really wanted to search, pass in a regexp as the argument " .
564 "like so: \$c->${warn_for}(qr/${name}/)";
566 $c->log->warn( "${msg}$shortmess" );
572 # Find possible names for a prefix
574 my ( $c, @prefixes ) = @_;
575 my $appclass = ref $c || $c;
577 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
579 my @names = map { s{$filter}{}; $_; }
580 $c->_comp_names_search_prefixes( undef, @prefixes );
585 # Filter a component before returning by calling ACCEPT_CONTEXT if available
586 sub _filter_component {
587 my ( $c, $comp, @args ) = @_;
589 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
590 return $comp->ACCEPT_CONTEXT( $c, @args );
596 =head2 COMPONENT ACCESSORS
598 =head2 $c->controller($name)
600 Gets a L<Catalyst::Controller> instance by name.
602 $c->controller('Foo')->do_stuff;
604 If the name is omitted, will return the controller for the dispatched
607 If you want to search for controllers, pass in a regexp as the argument.
609 # find all controllers that start with Foo
610 my @foo_controllers = $c->controller(qr{^Foo});
616 my ( $c, $name, @args ) = @_;
618 my $appclass = ref($c) || $c;
620 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
621 my $comps = $c->components;
622 my $check = $appclass."::Controller::".$name;
623 return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check};
625 my @result = $c->_comp_search_prefixes( $name, qw/Controller C/ );
626 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
627 return $c->_filter_component( $result[ 0 ], @args );
630 return $c->component( $c->action->class );
633 =head2 $c->model($name)
635 Gets a L<Catalyst::Model> instance by name.
637 $c->model('Foo')->do_stuff;
639 Any extra arguments are directly passed to ACCEPT_CONTEXT.
641 If the name is omitted, it will look for
642 - a model object in $c->stash->{current_model_instance}, then
643 - a model name in $c->stash->{current_model}, then
644 - a config setting 'default_model', or
645 - check if there is only one model, and return it if that's the case.
647 If you want to search for models, pass in a regexp as the argument.
649 # find all models that start with Foo
650 my @foo_models = $c->model(qr{^Foo});
655 my ( $c, $name, @args ) = @_;
656 my $appclass = ref($c) || $c;
658 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
659 my $comps = $c->components;
660 my $check = $appclass."::Model::".$name;
661 return $c->_filter_component( $comps->{$check}, @args ) if exists $comps->{$check};
663 my @result = $c->_comp_search_prefixes( $name, qw/Model M/ );
664 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
665 return $c->_filter_component( $result[ 0 ], @args );
669 return $c->stash->{current_model_instance}
670 if $c->stash->{current_model_instance};
671 return $c->model( $c->stash->{current_model} )
672 if $c->stash->{current_model};
674 return $c->model( $appclass->config->{default_model} )
675 if $appclass->config->{default_model};
677 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/Model M/);
680 ( my $name = ref $comp ) =~ s{$appclass\::M(odel)?::}{};
681 $c->log->warn( Carp::shortmess('Calling $c->model() with no arguments has been deprecated and will be removed.') );
682 $c->log->warn( "You could change the method call to \$c->model('$name') to retrieve this component" );
683 $c->log->warn( "or you should set \$c->config(default_model => '$name')." );
684 return $c->_filter_component( $comp );
688 'Calling $c->model() will fail unless you specify one of:',
689 '* $c->config(default_model => "the name of the default model to use")',
690 '* $c->stash->{current_model} # the name of the model to use for this request',
691 '* $c->stash->{current_model_instance} # the instance of the model to use for this request' )
696 =head2 $c->view($name)
698 Gets a L<Catalyst::View> instance by name.
700 $c->view('Foo')->do_stuff;
702 Any extra arguments are directly passed to ACCEPT_CONTEXT.
704 If the name is omitted, it will look for
705 - a view object in $c->stash->{current_view_instance}, then
706 - a view name in $c->stash->{current_view}, then
707 - a config setting 'default_view', or
708 - check if there is only one view, and return it if that's the case.
710 If you want to search for views, pass in a regexp as the argument.
712 # find all views that start with Foo
713 my @foo_views = $c->view(qr{^Foo});
718 my ( $c, $name, @args ) = @_;
720 my $appclass = ref($c) || $c;
722 unless ( ref($name) ) { # Direct component hash lookup to avoid costly regexps
723 my $comps = $c->components;
724 my $check = $appclass."::View::".$name;
725 if( exists $comps->{$check} ) {
726 return $c->_filter_component( $comps->{$check}, @args );
729 $c->log->warn( "Attempted to use view '$check', but does not exist" );
732 my @result = $c->_comp_search_prefixes( $name, qw/View V/ );
733 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
734 return $c->_filter_component( $result[ 0 ], @args );
738 return $c->stash->{current_view_instance}
739 if $c->stash->{current_view_instance};
740 return $c->view( $c->stash->{current_view} )
741 if $c->stash->{current_view};
743 return $c->view( $appclass->config->{default_view} )
744 if $appclass->config->{default_view};
746 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/View V/);
749 ( my $name = ref $comp ) =~ s{$appclass\::V(iew)?\::}{};
750 $c->log->warn( Carp::shortmess('Calling $c->view() with no arguments has been deprecated and will be removed.') );
751 $c->log->warn( "You could change the method call to \$c->view('$name') to retrieve this component," );
752 $c->log->warn( "or you should set \$c->config(default_view => '$name')." );
753 return $c->_filter_component( $comp );
757 'Calling $c->view() will fail unless you specify one of:',
758 '* $c->config(default_view => "the name of the default view to use")',
759 '* $c->stash->{current_view} # the name of the view to use for this request',
760 '* $c->stash->{current_view_instance} # the instance of the view to use for this request' )
764 =head2 $c->controllers
766 Returns the available names which can be passed to $c->controller
772 return $c->_comp_names(qw/Controller C/);
777 Returns the available names which can be passed to $c->model
783 return $c->_comp_names(qw/Model M/);
789 Returns the available names which can be passed to $c->view
795 return $c->_comp_names(qw/View V/);
798 =head2 $c->comp($name)
800 =head2 $c->component($name)
802 Gets a component object by name. This method is not recommended,
803 unless you want to get a specific component by full
804 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
805 should be used instead.
807 If C<$name> is a regexp, a list of components matched against the full
808 component name will be returned.
810 If Catalyst can't find a component by name, it will fallback to regex
811 matching by default. To disable this behaviour set
812 disable_component_resolution_regex_fallback to a true value.
814 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
819 my ( $c, $name, @args ) = @_;
822 my $comps = $c->components;
825 # is it the exact name?
826 return $c->_filter_component( $comps->{ $name }, @args )
827 if exists $comps->{ $name };
829 # perhaps we just omitted "MyApp"?
830 my $composed = ( ref $c || $c ) . "::${name}";
831 return $c->_filter_component( $comps->{ $composed }, @args )
832 if exists $comps->{ $composed };
834 # search all of the models, views and controllers
835 my( $comp ) = $c->_comp_search_prefixes( $name, qw/Model M Controller C View V/ );
836 return $c->_filter_component( $comp, @args ) if $comp;
840 if $c->config->{disable_component_resolution_regex_fallback};
842 # This is here so $c->comp( '::M::' ) works
843 my $query = ref $name ? $name : qr{$name}i;
845 my @result = grep { m{$query} } keys %{ $c->components };
846 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
849 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
850 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
851 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
852 return $c->_filter_component( $result[ 0 ], @args );
855 # I would expect to return an empty list here, but that breaks back-compat
859 return sort keys %{ $c->components };
862 =head2 CLASS DATA AND HELPER CLASSES
866 Returns or takes a hashref containing the application's configuration.
868 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
870 You can also use a C<YAML>, C<XML> or L<Config::General> config file
871 like C<myapp.conf> in your applications home directory. See
872 L<Catalyst::Plugin::ConfigLoader>.
874 =head3 Cascading configuration
876 The config method is present on all Catalyst components, and configuration
877 will be merged when an application is started. Configuration loaded with
878 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
879 followed by configuration in your top level C<MyApp> class. These two
880 configurations are merged, and then configuration data whose hash key matches a
881 component name is merged with configuration for that component.
883 The configuration for a component is then passed to the C<new> method when a
884 component is constructed.
888 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
889 MyApp::Model::Foo->config({ quux => 'frob', overrides => 'this' });
891 will mean that C<MyApp::Model::Foo> receives the following data when
894 MyApp::Model::Foo->new({
900 It's common practice to use a Moose attribute
901 on the receiving component to access the config value.
903 package MyApp::Model::Foo;
907 # this attr will receive 'baz' at construction time
913 You can then get the value 'baz' by calling $c->model('Foo')->bar
914 (or $self->bar inside code in the model).
916 B<NOTE:> you MUST NOT call C<< $self->config >> or C<< __PACKAGE__->config >>
917 as a way of reading config within your code, as this B<will not> give you the
918 correctly merged config back. You B<MUST> take the config values supplied to
919 the constructor and use those instead.
923 around config => sub {
927 croak('Setting config after setup has been run is not allowed.')
928 if ( @_ and $c->setup_finished );
935 Returns the logging object instance. Unless it is already set, Catalyst
936 sets this up with a L<Catalyst::Log> object. To use your own log class,
937 set the logger with the C<< __PACKAGE__->log >> method prior to calling
938 C<< __PACKAGE__->setup >>.
940 __PACKAGE__->log( MyLogger->new );
945 $c->log->info( 'Now logging with my own logger!' );
947 Your log class should implement the methods described in
953 Returns 1 if debug mode is enabled, 0 otherwise.
955 You can enable debug mode in several ways:
959 =item By calling myapp_server.pl with the -d flag
961 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
963 =item The -Debug option in your MyApp.pm
965 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
969 The first three also set the log level to 'debug'.
971 Calling C<< $c->debug(1) >> has no effect.
977 =head2 $c->dispatcher
979 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
983 Returns the engine instance. See L<Catalyst::Engine>.
986 =head2 UTILITY METHODS
988 =head2 $c->path_to(@path)
990 Merges C<@path> with C<< $c->config->{home} >> and returns a
991 L<Path::Class::Dir> object. Note you can usually use this object as
992 a filename, but sometimes you will have to explicitly stringify it
993 yourself by calling the C<< ->stringify >> method.
997 $c->path_to( 'db', 'sqlite.db' );
1002 my ( $c, @path ) = @_;
1003 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
1004 if ( -d $path ) { return $path }
1005 else { return Path::Class::File->new( $c->config->{home}, @path ) }
1009 my ( $class, $name, $plugin, @args ) = @_;
1011 # See block comment in t/unit_core_plugin.t
1012 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in a future release/);
1014 $class->_register_plugin( $plugin, 1 );
1016 eval { $plugin->import };
1017 $class->mk_classdata($name);
1019 eval { $obj = $plugin->new(@args) };
1022 Catalyst::Exception->throw( message =>
1023 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1026 $class->$name($obj);
1027 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1033 Initializes the dispatcher and engine, loads any plugins, and loads the
1034 model, view, and controller components. You may also specify an array
1035 of plugins to load here, if you choose to not load them in the C<use
1039 MyApp->setup( qw/-Debug/ );
1041 B<Note:> You B<should not> wrap this method with method modifiers
1042 or bad things will happen - wrap the C<setup_finalize> method instead.
1047 my ( $class, @arguments ) = @_;
1048 croak('Running setup more than once')
1049 if ( $class->setup_finished );
1051 unless ( $class->isa('Catalyst') ) {
1053 Catalyst::Exception->throw(
1054 message => qq/'$class' does not inherit from Catalyst/ );
1057 if ( $class->arguments ) {
1058 @arguments = ( @arguments, @{ $class->arguments } );
1064 foreach (@arguments) {
1068 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1070 elsif (/^-(\w+)=?(.*)$/) {
1071 $flags->{ lc $1 } = $2;
1074 push @{ $flags->{plugins} }, $_;
1078 $class->setup_home( delete $flags->{home} );
1080 $class->setup_log( delete $flags->{log} );
1081 $class->setup_plugins( delete $flags->{plugins} );
1082 $class->setup_dispatcher( delete $flags->{dispatcher} );
1083 if (my $engine = delete $flags->{engine}) {
1084 $class->log->warn("Specifying the engine in ->setup is no longer supported, see Catalyst::Upgrading");
1086 $class->setup_engine();
1087 $class->setup_stats( delete $flags->{stats} );
1089 for my $flag ( sort keys %{$flags} ) {
1091 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1092 &$code( $class, delete $flags->{$flag} );
1095 $class->log->warn(qq/Unknown flag "$flag"/);
1099 eval { require Catalyst::Devel; };
1100 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1101 $class->log->warn(<<"EOF");
1102 You are running an old script!
1104 Please update by running (this will overwrite existing files):
1105 catalyst.pl -force -scripts $class
1107 or (this will not overwrite existing files):
1108 catalyst.pl -scripts $class
1113 if ( $class->debug ) {
1114 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1117 my $column_width = Catalyst::Utils::term_width() - 6;
1118 my $t = Text::SimpleTable->new($column_width);
1119 $t->row($_) for @plugins;
1120 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1123 my $dispatcher = $class->dispatcher;
1124 my $engine = $class->engine;
1125 my $home = $class->config->{home};
1127 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1128 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1132 ? $class->log->debug(qq/Found home "$home"/)
1133 : $class->log->debug(qq/Home "$home" doesn't exist/)
1134 : $class->log->debug(q/Couldn't find home/);
1137 # Call plugins setup, this is stupid and evil.
1138 # Also screws C3 badly on 5.10, hack to avoid.
1140 no warnings qw/redefine/;
1141 local *setup = sub { };
1142 $class->setup unless $Catalyst::__AM_RESTARTING;
1145 # Initialize our data structure
1146 $class->components( {} );
1148 $class->setup_components;
1150 if ( $class->debug ) {
1151 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1152 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1153 for my $comp ( sort keys %{ $class->components } ) {
1154 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1155 $t->row( $comp, $type );
1157 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1158 if ( keys %{ $class->components } );
1161 # Add our self to components, since we are also a component
1162 if( $class->isa('Catalyst::Controller') ){
1163 $class->components->{$class} = $class;
1166 $class->setup_actions;
1168 if ( $class->debug ) {
1169 my $name = $class->config->{name} || 'Application';
1170 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1173 # Make sure that the application class becomes immutable at this point,
1174 B::Hooks::EndOfScope::on_scope_end {
1176 my $meta = Class::MOP::get_metaclass_by_name($class);
1179 && ! { $meta->immutable_options }->{replace_constructor}
1181 $class->isa('Class::Accessor::Fast')
1182 || $class->isa('Class::Accessor')
1185 warn "You made your application class ($class) immutable, "
1186 . "but did not inline the\nconstructor. "
1187 . "This will break catalyst, as your app \@ISA "
1188 . "Class::Accessor(::Fast)?\nPlease pass "
1189 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1191 $meta->make_immutable(
1192 replace_constructor => 1,
1193 ) unless $meta->is_immutable;
1196 if ($class->config->{case_sensitive}) {
1197 $class->log->warn($class . "->config->{case_sensitive} is set.");
1198 $class->log->warn("This setting is deprecated and planned to be removed in Catalyst 5.81.");
1201 $class->setup_finalize;
1202 # Should be the last thing we do so that user things hooking
1203 # setup_finalize can log..
1204 $class->log->_flush() if $class->log->can('_flush');
1205 return 1; # Explicit return true as people have __PACKAGE__->setup as the last thing in their class. HATE.
1208 =head2 $app->setup_finalize
1210 A hook to attach modifiers to. This method does not do anything except set the
1211 C<setup_finished> accessor.
1213 Applying method modifiers to the C<setup> method doesn't work, because of quirky things done for plugin setup.
1217 after setup_finalize => sub {
1225 sub setup_finalize {
1227 $class->setup_finished(1);
1230 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1232 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1234 Constructs an absolute L<URI> object based on the application root, the
1235 provided path, and the additional arguments and query parameters provided.
1236 When used as a string, provides a textual URI. If you need more flexibility
1237 than this (i.e. the option to provide relative URIs etc.) see
1238 L<Catalyst::Plugin::SmartURI>.
1240 If no arguments are provided, the URI for the current action is returned.
1241 To return the current action and also provide @args, use
1242 C<< $c->uri_for( $c->action, @args ) >>.
1244 If the first argument is a string, it is taken as a public URI path relative
1245 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1246 relative to the application root (if it does). It is then merged with
1247 C<< $c->request->base >>; any C<@args> are appended as additional path
1248 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1250 If the first argument is a L<Catalyst::Action> it represents an action which
1251 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1252 optional C<\@captures> argument (an arrayref) allows passing the captured
1253 variables that are needed to fill in the paths of Chained and Regex actions;
1254 once the path is resolved, C<uri_for> continues as though a path was
1255 provided, appending any arguments or parameters and creating an absolute
1258 The captures for the current request can be found in
1259 C<< $c->request->captures >>, and actions can be resolved using
1260 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1261 path, use C<< $c->uri_for_action >> instead.
1263 # Equivalent to $c->req->uri
1264 $c->uri_for($c->action, $c->req->captures,
1265 @{ $c->req->args }, $c->req->params);
1267 # For the Foo action in the Bar controller
1268 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1270 # Path to a static resource
1271 $c->uri_for('/static/images/logo.png');
1276 my ( $c, $path, @args ) = @_;
1278 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1279 $path = $path->path_prefix;
1284 undef($path) if (defined $path && $path eq '');
1287 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1289 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1290 foreach my $arg (@args) {
1291 utf8::encode($arg) if utf8::is_utf8($arg);
1292 $arg =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1295 if ( blessed($path) ) { # action object
1296 s|/|%2F|g for @args;
1297 my $captures = [ map { s|/|%2F|g; $_; }
1298 ( scalar @args && ref $args[0] eq 'ARRAY'
1302 foreach my $capture (@$captures) {
1303 utf8::encode($capture) if utf8::is_utf8($capture);
1304 $capture =~ s/([^$URI::uric])/$URI::Escape::escapes{$1}/go;
1308 # ->uri_for( $action, \@captures_and_args, \%query_values? )
1309 if( !@args && $action->number_of_args ) {
1310 my $expanded_action = $c->dispatcher->expand_action( $action );
1312 my $num_captures = $expanded_action->number_of_captures;
1313 unshift @args, splice @$captures, $num_captures;
1316 $path = $c->dispatcher->uri_for_action($action, $captures);
1317 if (not defined $path) {
1318 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1322 $path = '/' if $path eq '';
1325 unshift(@args, $path);
1327 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1328 my $namespace = $c->namespace;
1329 if (defined $path) { # cheesy hack to handle path '../foo'
1330 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1332 unshift(@args, $namespace || '');
1335 # join args with '/', or a blank string
1336 my $args = join('/', grep { defined($_) } @args);
1337 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1339 my $base = $c->req->base;
1340 my $class = ref($base);
1341 $base =~ s{(?<!/)$}{/};
1345 if (my @keys = keys %$params) {
1346 # somewhat lifted from URI::_query's query_form
1347 $query = '?'.join('&', map {
1348 my $val = $params->{$_};
1349 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1352 $val = '' unless defined $val;
1355 utf8::encode( $param ) if utf8::is_utf8($param);
1356 # using the URI::Escape pattern here so utf8 chars survive
1357 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1359 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1363 my $res = bless(\"${base}${args}${query}", $class);
1367 =head2 $c->uri_for_action( $path, \@captures_and_args?, @args?, \%query_values? )
1369 =head2 $c->uri_for_action( $action, \@captures_and_args?, @args?, \%query_values? )
1375 A private path to the Catalyst action you want to create a URI for.
1377 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1378 >> and passing the resulting C<$action> and the remaining arguments to C<<
1381 You can also pass in a Catalyst::Action object, in which case it is passed to
1384 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.
1386 For example, if the action looks like:
1388 package MyApp::Controller::Users;
1390 sub lst : Path('the-list') {}
1394 $c->uri_for_action('/users/lst')
1396 and it will create the URI /users/the-list.
1398 =item \@captures_and_args?
1400 Optional array reference of Captures (i.e. C<<CaptureArgs or $c->req->captures>)
1401 and arguments to the request. Usually used with L<Catalyst::DispatchType::Chained>
1402 to interpolate all the parameters in the URI.
1406 Optional list of extra arguments - can be supplied in the
1407 C<< \@captures_and_args? >> array ref, or here - whichever is easier for your
1410 Your action can have zero, a fixed or a variable number of args (e.g.
1411 C<< Args(1) >> for a fixed number or C<< Args() >> for a variable number)..
1413 =item \%query_values?
1415 Optional array reference of query parameters to append. E.g.
1421 /rest/of/your/uri?foo=bar
1427 sub uri_for_action {
1428 my ( $c, $path, @args ) = @_;
1429 my $action = blessed($path)
1431 : $c->dispatcher->get_action_by_path($path);
1432 unless (defined $action) {
1433 croak "Can't find action for path '$path'";
1435 return $c->uri_for( $action, @args );
1438 =head2 $c->welcome_message
1440 Returns the Catalyst welcome HTML page.
1444 sub welcome_message {
1446 my $name = $c->config->{name};
1447 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1448 my $prefix = Catalyst::Utils::appprefix( ref $c );
1449 $c->response->content_type('text/html; charset=utf-8');
1451 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1452 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1453 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1455 <meta http-equiv="Content-Language" content="en" />
1456 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1457 <title>$name on Catalyst $VERSION</title>
1458 <style type="text/css">
1461 background-color: #eee;
1468 margin-bottom: 10px;
1470 background-color: #ccc;
1471 border: 1px solid #aaa;
1476 font-family: verdana, tahoma, sans-serif;
1479 font-family: verdana, tahoma, sans-serif;
1482 text-decoration: none;
1484 border-bottom: 1px dotted #bbb;
1486 :link:hover, :visited:hover {
1499 background-color: #fff;
1500 border: 1px solid #aaa;
1504 font-weight: normal;
1526 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1531 <img src="$logo" alt="Catalyst Logo" />
1533 <p>Welcome to the world of Catalyst.
1534 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1535 framework will make web development something you had
1536 never expected it to be: Fun, rewarding, and quick.</p>
1537 <h2>What to do now?</h2>
1538 <p>That really depends on what <b>you</b> want to do.
1539 We do, however, provide you with a few starting points.</p>
1540 <p>If you want to jump right into web development with Catalyst
1541 you might want to start with a tutorial.</p>
1542 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1544 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1546 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1547 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1549 <h2>What to do next?</h2>
1550 <p>Next it's time to write an actual application. Use the
1551 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1552 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1553 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1554 they can save you a lot of work.</p>
1555 <pre><code>script/${prefix}_create.pl --help</code></pre>
1556 <p>Also, be sure to check out the vast and growing
1557 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1558 you are likely to find what you need there.
1562 <p>Catalyst has a very active community. Here are the main places to
1563 get in touch with us.</p>
1566 <a href="http://dev.catalyst.perl.org">Wiki</a>
1569 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1572 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1575 <h2>In conclusion</h2>
1576 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1577 as we enjoyed making it. Please contact us if you have ideas
1578 for improvement or other feedback.</p>
1588 Contains a hash of options passed from the application script, including
1589 the original ARGV the script received, the processed values from that
1590 ARGV and any extra arguments to the script which were not processed.
1592 This can be used to add custom options to your application's scripts
1593 and setup your application differently depending on the values of these
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
1867 $response->body(<<"EOF");
1868 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
1869 <html xmlns="http://www.w3.org/1999/xhtml">
1871 <title>Moved</title>
1874 <p>This item has moved <a href="$location">here</a>.</p>
1878 $response->content_type('text/html; charset=utf-8');
1883 if ( defined $response->body && length $response->body && !$response->content_length ) {
1885 # get the length from a filehandle
1886 if ( blessed( $response->body ) && $response->body->can('read') || ref( $response->body ) eq 'GLOB' )
1888 my $size = -s $response->body;
1890 $response->content_length( $size );
1893 $c->log->warn('Serving filehandle without a content-length');
1897 # everything should be bytes at this point, but just in case
1898 $response->content_length( length( $response->body ) );
1903 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1904 $response->headers->remove_header("Content-Length");
1905 $response->body('');
1908 $c->finalize_cookies;
1910 $c->engine->finalize_headers( $c, @_ );
1913 $response->finalized_headers(1);
1916 =head2 $c->finalize_output
1918 An alias for finalize_body.
1920 =head2 $c->finalize_read
1922 Finalizes the input after reading is complete.
1926 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1928 =head2 $c->finalize_uploads
1930 Finalizes uploads. Cleans up any temporary files.
1934 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1936 =head2 $c->get_action( $action, $namespace )
1938 Gets an action in a given namespace.
1942 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1944 =head2 $c->get_actions( $action, $namespace )
1946 Gets all actions of a given name in a namespace and all parent
1951 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1953 =head2 $app->handle_request( @arguments )
1955 Called to handle each HTTP request.
1959 sub handle_request {
1960 my ( $class, @arguments ) = @_;
1962 # Always expect worst case!
1965 if ($class->debug) {
1966 my $secs = time - $START || 1;
1967 my $av = sprintf '%.3f', $COUNT / $secs;
1968 my $time = localtime time;
1969 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1972 my $c = $class->prepare(@arguments);
1974 $status = $c->finalize;
1977 chomp(my $error = $_);
1978 $class->log->error(qq/Caught exception in engine "$error"/);
1983 if(my $coderef = $class->log->can('_flush')){
1984 $class->log->$coderef();
1989 =head2 $class->prepare( @arguments )
1991 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1997 my ( $class, @arguments ) = @_;
2000 # After the app/ctxt split, this should become an attribute based on something passed
2001 # into the application.
2002 $class->context_class( ref $class || $class ) unless $class->context_class;
2004 my $c = $class->context_class->new({});
2006 # For on-demand data
2007 $c->request->_context($c);
2008 $c->response->_context($c);
2010 #surely this is not the most efficient way to do things...
2011 $c->stats($class->stats_class->new)->enable($c->use_stats);
2012 if ( $c->debug || $c->config->{enable_catalyst_header} ) {
2013 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
2017 # Allow engine to direct the prepare flow (for POE)
2018 if ( my $prepare = $c->engine->can('prepare') ) {
2019 $c->engine->$prepare( $c, @arguments );
2022 $c->prepare_request(@arguments);
2023 $c->prepare_connection;
2024 $c->prepare_query_parameters;
2025 $c->prepare_headers;
2026 $c->prepare_cookies;
2029 # Prepare the body for reading, either by prepare_body
2030 # or the user, if they are using $c->read
2033 # Parse the body unless the user wants it on-demand
2034 unless ( ref($c)->config->{parse_on_demand} ) {
2040 # VERY ugly and probably shouldn't rely on ->finalize actually working
2042 # failed prepare is always due to an invalid request, right?
2043 $c->response->status(400);
2044 $c->response->content_type('text/plain');
2045 $c->response->body('Bad Request');
2046 # Note we call finalize and then die here, which escapes
2047 # finalize being called in the enclosing block..
2048 # It in fact couldn't be called, as we don't return $c..
2049 # This is a mess - but I'm unsure you can fix this without
2050 # breaking compat for people doing crazy things (we should set
2051 # the 400 and just return the ctx here IMO, letting finalize get called
2062 =head2 $c->prepare_action
2064 Prepares action. See L<Catalyst::Dispatcher>.
2068 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
2070 =head2 $c->prepare_body
2072 Prepares message body.
2079 return if $c->request->_has_body;
2081 # Initialize on-demand data
2082 $c->engine->prepare_body( $c, @_ );
2083 $c->prepare_parameters;
2084 $c->prepare_uploads;
2087 =head2 $c->prepare_body_chunk( $chunk )
2089 Prepares a chunk of data before sending it to L<HTTP::Body>.
2091 See L<Catalyst::Engine>.
2095 sub prepare_body_chunk {
2097 $c->engine->prepare_body_chunk( $c, @_ );
2100 =head2 $c->prepare_body_parameters
2102 Prepares body parameters.
2106 sub prepare_body_parameters {
2108 $c->engine->prepare_body_parameters( $c, @_ );
2111 =head2 $c->prepare_connection
2113 Prepares connection.
2117 sub prepare_connection {
2119 $c->engine->prepare_connection( $c, @_ );
2122 =head2 $c->prepare_cookies
2128 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2130 =head2 $c->prepare_headers
2136 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2138 =head2 $c->prepare_parameters
2140 Prepares parameters.
2144 sub prepare_parameters {
2146 $c->prepare_body_parameters;
2147 $c->engine->prepare_parameters( $c, @_ );
2150 =head2 $c->prepare_path
2152 Prepares path and base.
2156 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2158 =head2 $c->prepare_query_parameters
2160 Prepares query parameters.
2164 sub prepare_query_parameters {
2167 $c->engine->prepare_query_parameters( $c, @_ );
2170 =head2 $c->log_request
2172 Writes information about the request to the debug logs. This includes:
2176 =item * Request method, path, and remote IP address
2178 =item * Query keywords (see L<Catalyst::Request/query_keywords>)
2180 =item * Request parameters
2182 =item * File uploads
2191 return unless $c->debug;
2193 my($dump) = grep {$_->[0] eq 'Request' } $c->dump_these;
2194 my $request = $dump->[1];
2196 my ( $method, $path, $address ) = ( $request->method, $request->path, $request->address );
2198 $path = '/' unless length $path;
2200 $c->log->debug(qq/"$method" request for "$path" from "$address"/);
2202 $c->log_request_headers($request->headers);
2204 if ( my $keywords = $request->query_keywords ) {
2205 $c->log->debug("Query keywords are: $keywords");
2208 $c->log_request_parameters( query => $request->query_parameters, $request->_has_body ? (body => $request->body_parameters) : () );
2210 $c->log_request_uploads($request);
2213 =head2 $c->log_response
2215 Writes information about the response to the debug logs by calling
2216 C<< $c->log_response_status_line >> and C<< $c->log_response_headers >>.
2223 return unless $c->debug;
2225 my($dump) = grep {$_->[0] eq 'Response' } $c->dump_these;
2226 my $response = $dump->[1];
2228 $c->log_response_status_line($response);
2229 $c->log_response_headers($response->headers);
2232 =head2 $c->log_response_status_line($response)
2234 Writes one line of information about the response to the debug logs. This includes:
2238 =item * Response status code
2240 =item * Content-Type header (if present)
2242 =item * Content-Length header (if present)
2248 sub log_response_status_line {
2249 my ($c, $response) = @_;
2253 'Response Code: %s; Content-Type: %s; Content-Length: %s',
2254 $response->status || 'unknown',
2255 $response->headers->header('Content-Type') || 'unknown',
2256 $response->headers->header('Content-Length') || 'unknown'
2261 =head2 $c->log_response_headers($headers);
2263 Hook method which can be wrapped by plugins to log the response headers.
2264 No-op in the default implementation.
2268 sub log_response_headers {}
2270 =head2 $c->log_request_parameters( query => {}, body => {} )
2272 Logs request parameters to debug logs
2276 sub log_request_parameters {
2278 my %all_params = @_;
2280 return unless $c->debug;
2282 my $column_width = Catalyst::Utils::term_width() - 44;
2283 foreach my $type (qw(query body)) {
2284 my $params = $all_params{$type};
2285 next if ! keys %$params;
2286 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ $column_width, 'Value' ] );
2287 for my $key ( sort keys %$params ) {
2288 my $param = $params->{$key};
2289 my $value = defined($param) ? $param : '';
2290 $t->row( $key, ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2292 $c->log->debug( ucfirst($type) . " Parameters are:\n" . $t->draw );
2296 =head2 $c->log_request_uploads
2298 Logs file uploads included in the request to the debug logs.
2299 The parameter name, filename, file type, and file size are all included in
2304 sub log_request_uploads {
2306 my $request = shift;
2307 return unless $c->debug;
2308 my $uploads = $request->uploads;
2309 if ( keys %$uploads ) {
2310 my $t = Text::SimpleTable->new(
2311 [ 12, 'Parameter' ],
2316 for my $key ( sort keys %$uploads ) {
2317 my $upload = $uploads->{$key};
2318 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2319 $t->row( $key, $u->filename, $u->type, $u->size );
2322 $c->log->debug( "File Uploads are:\n" . $t->draw );
2326 =head2 $c->log_request_headers($headers);
2328 Hook method which can be wrapped by plugins to log the request headers.
2329 No-op in the default implementation.
2333 sub log_request_headers {}
2335 =head2 $c->log_headers($type => $headers)
2337 Logs L<HTTP::Headers> (either request or response) to the debug logs.
2344 my $headers = shift; # an HTTP::Headers instance
2346 return unless $c->debug;
2348 my $column_width = Catalyst::Utils::term_width() - 28;
2349 my $t = Text::SimpleTable->new( [ 15, 'Header Name' ], [ $column_width, 'Value' ] );
2352 my ( $name, $value ) = @_;
2353 $t->row( $name, $value );
2356 $c->log->debug( ucfirst($type) . " Headers:\n" . $t->draw );
2360 =head2 $c->prepare_read
2362 Prepares the input for reading.
2366 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2368 =head2 $c->prepare_request
2370 Prepares the engine request.
2374 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2376 =head2 $c->prepare_uploads
2382 sub prepare_uploads {
2385 $c->engine->prepare_uploads( $c, @_ );
2388 =head2 $c->prepare_write
2390 Prepares the output for writing.
2394 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2396 =head2 $c->request_class
2398 Returns or sets the request class. Defaults to L<Catalyst::Request>.
2400 =head2 $c->response_class
2402 Returns or sets the response class. Defaults to L<Catalyst::Response>.
2404 =head2 $c->read( [$maxlength] )
2406 Reads a chunk of data from the request body. This method is designed to
2407 be used in a while loop, reading C<$maxlength> bytes on every call.
2408 C<$maxlength> defaults to the size of the request if not specified.
2410 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2413 Warning: If you use read(), Catalyst will not process the body,
2414 so you will not be able to access POST parameters or file uploads via
2415 $c->request. You must handle all body parsing yourself.
2419 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2429 $app->engine_loader->needs_psgi_engine_compat_hack ?
2430 $app->engine->run($app, @_) :
2431 $app->engine->run( $app, $app->_finalized_psgi_app, @_ );
2434 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2436 Sets an action in a given namespace.
2440 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2442 =head2 $c->setup_actions($component)
2444 Sets up actions for a component.
2448 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2450 =head2 $c->setup_components
2452 This method is called internally to set up the application's components.
2454 It finds modules by calling the L<locate_components> method, expands them to
2455 package names with the L<expand_component_module> method, and then installs
2456 each component into the application.
2458 The C<setup_components> config option is passed to both of the above methods.
2460 Installation of each component is performed by the L<setup_component> method,
2465 sub setup_components {
2468 my $config = $class->config->{ setup_components };
2470 my @comps = $class->locate_components($config);
2471 my %comps = map { $_ => 1 } @comps;
2473 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2474 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2475 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2476 ) if $deprecatedcatalyst_component_names;
2478 for my $component ( @comps ) {
2480 # We pass ignore_loaded here so that overlay files for (e.g.)
2481 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2482 # we know M::P::O found a file on disk so this is safe
2484 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2487 for my $component (@comps) {
2488 my $instance = $class->components->{ $component } = $class->setup_component($component);
2489 my @expanded_components = $instance->can('expand_modules')
2490 ? $instance->expand_modules( $component, $config )
2491 : $class->expand_component_module( $component, $config );
2492 for my $component (@expanded_components) {
2493 next if $comps{$component};
2494 $class->components->{ $component } = $class->setup_component($component);
2499 =head2 $c->locate_components( $setup_component_config )
2501 This method is meant to provide a list of component modules that should be
2502 setup for the application. By default, it will use L<Module::Pluggable>.
2504 Specify a C<setup_components> config option to pass additional options directly
2505 to L<Module::Pluggable>. To add additional search paths, specify a key named
2506 C<search_extra> as an array reference. Items in the array beginning with C<::>
2507 will have the application class name prepended to them.
2511 sub locate_components {
2515 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2516 my $extra = delete $config->{ search_extra } || [];
2518 push @paths, @$extra;
2520 my $locator = Module::Pluggable::Object->new(
2521 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2525 # XXX think about ditching this sort entirely
2526 my @comps = sort { length $a <=> length $b } $locator->plugins;
2531 =head2 $c->expand_component_module( $component, $setup_component_config )
2533 Components found by C<locate_components> will be passed to this method, which
2534 is expected to return a list of component (package) names to be set up.
2538 sub expand_component_module {
2539 my ($class, $module) = @_;
2540 return Devel::InnerPackage::list_packages( $module );
2543 =head2 $c->setup_component
2547 sub setup_component {
2548 my( $class, $component ) = @_;
2550 unless ( $component->can( 'COMPONENT' ) ) {
2554 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2555 my $config = $class->config->{ $suffix } || {};
2556 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2557 # methods also pass it. local to avoid pointlessly shitting in config
2558 # for the debug screen, as $component is already the key name.
2559 local $config->{catalyst_component_name} = $component;
2561 my $instance = eval { $component->COMPONENT( $class, $config ); };
2563 if ( my $error = $@ ) {
2565 Catalyst::Exception->throw(
2566 message => qq/Couldn't instantiate component "$component", "$error"/
2570 unless (blessed $instance) {
2571 my $metaclass = Moose::Util::find_meta($component);
2572 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2573 my $component_method_from = $method_meta->associated_metaclass->name;
2574 my $value = defined($instance) ? $instance : 'undef';
2575 Catalyst::Exception->throw(
2577 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2583 =head2 $c->setup_dispatcher
2589 sub setup_dispatcher {
2590 my ( $class, $dispatcher ) = @_;
2593 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2596 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2597 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2600 unless ($dispatcher) {
2601 $dispatcher = $class->dispatcher_class;
2604 Class::MOP::load_class($dispatcher);
2606 # dispatcher instance
2607 $class->dispatcher( $dispatcher->new );
2610 =head2 $c->setup_engine
2617 my ($class, $requested_engine) = @_;
2619 if (!$class->engine_loader || $requested_engine) {
2620 $class->engine_loader(
2621 Catalyst::EngineLoader->new({
2622 application_name => $class,
2623 (defined $requested_engine
2624 ? (catalyst_engine_class => $requested_engine) : ()),
2629 $class->engine_loader->catalyst_engine_class;
2633 my ($class, $requested_engine) = @_;
2636 my $loader = $class->engine_loader;
2638 if (!$loader || $requested_engine) {
2639 $loader = Catalyst::EngineLoader->new({
2640 application_name => $class,
2641 (defined $requested_engine
2642 ? (requested_engine => $requested_engine) : ()),
2645 $class->engine_loader($loader);
2648 $loader->catalyst_engine_class;
2651 # Don't really setup_engine -- see _setup_psgi_app for explanation.
2652 return if $class->loading_psgi_file;
2654 Class::MOP::load_class($engine);
2656 if ($ENV{MOD_PERL}) {
2657 my $apache = $class->engine_loader->auto;
2659 my $meta = find_meta($class);
2660 my $was_immutable = $meta->is_immutable;
2661 my %immutable_options = $meta->immutable_options;
2662 $meta->make_mutable if $was_immutable;
2664 $meta->add_method(handler => sub {
2666 my $psgi_app = $class->_finalized_psgi_app;
2667 $apache->call_app($r, $psgi_app);
2670 $meta->make_immutable(%immutable_options) if $was_immutable;
2673 $class->engine( $engine->new );
2678 sub _finalized_psgi_app {
2681 unless ($app->_psgi_app) {
2682 my $psgi_app = $app->_setup_psgi_app;
2683 $app->_psgi_app($psgi_app);
2686 return $app->_psgi_app;
2689 sub _setup_psgi_app {
2692 for my $home (Path::Class::Dir->new($app->config->{home})) {
2693 my $psgi_file = $home->file(
2694 Catalyst::Utils::appprefix($app) . '.psgi',
2697 next unless -e $psgi_file;
2699 # If $psgi_file calls ->setup_engine, it's doing so to load
2700 # Catalyst::Engine::PSGI. But if it does that, we're only going to
2701 # throw away the loaded PSGI-app and load the 5.9 Catalyst::Engine
2702 # anyway. So set a flag (ick) that tells setup_engine not to populate
2703 # $c->engine or do any other things we might regret.
2705 $app->loading_psgi_file(1);
2706 my $psgi_app = Plack::Util::load_psgi($psgi_file);
2707 $app->loading_psgi_file(0);
2710 unless $app->engine_loader->needs_psgi_engine_compat_hack;
2713 Found a legacy Catalyst::Engine::PSGI .psgi file at ${psgi_file}.
2715 Its content has been ignored. Please consult the Catalyst::Upgrading
2716 documentation on how to upgrade from Catalyst::Engine::PSGI.
2720 return $app->apply_default_middlewares($app->psgi_app);
2723 =head2 $c->apply_default_middlewares
2725 Adds the following L<Plack> middlewares to your application, since they are
2726 useful and commonly needed:
2728 L<Plack::Middleware::ReverseProxy>, (conditionally added based on the status
2729 of your $ENV{REMOTE_ADDR}, and can be forced on with C<using_frontend_proxy>
2730 or forced off with C<ignore_frontend_proxy>), L<Plack::Middleware::LighttpdScriptNameFix>
2731 (if you are using Lighttpd), L<Plack::Middleware::IIS6ScriptNameFix> (always
2732 applied since this middleware is smart enough to conditionally apply itself).
2734 Additionally if we detect we are using Nginx, we add a bit of custom middleware
2735 to solve some problems with the way that server handles $ENV{PATH_INFO} and
2741 sub apply_default_middlewares {
2742 my ($app, $psgi_app) = @_;
2744 $psgi_app = Plack::Middleware::Conditional->wrap(
2746 builder => sub { Plack::Middleware::ReverseProxy->wrap($_[0]) },
2749 return if $app->config->{ignore_frontend_proxy};
2750 return $env->{REMOTE_ADDR} eq '127.0.0.1'
2751 || $app->config->{using_frontend_proxy};
2755 # If we're running under Lighttpd, swap PATH_INFO and SCRIPT_NAME
2756 # http://lists.scsys.co.uk/pipermail/catalyst/2006-June/008361.html
2757 $psgi_app = Plack::Middleware::Conditional->wrap(
2759 builder => sub { Plack::Middleware::LighttpdScriptNameFix->wrap($_[0]) },
2762 return unless $env->{SERVER_SOFTWARE} && $env->{SERVER_SOFTWARE} =~ m!lighttpd[-/]1\.(\d+\.\d+)!;
2763 return unless $1 < 4.23;
2768 # we're applying this unconditionally as the middleware itself already makes
2769 # sure it doesn't fuck things up if it's not running under one of the right
2771 $psgi_app = Plack::Middleware::IIS6ScriptNameFix->wrap($psgi_app);
2778 Returns a PSGI application code reference for the catalyst application
2779 C<$c>. This is the bare application without any middlewares
2780 applied. C<${myapp}.psgi> is not taken into account.
2782 This is what you want to be using to retrieve the PSGI application code
2783 reference of your Catalyst application for use in F<.psgi> files.
2789 return $app->engine->build_psgi_app($app);
2792 =head2 $c->setup_home
2794 Sets up the home directory.
2799 my ( $class, $home ) = @_;
2801 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2805 $home ||= Catalyst::Utils::home($class);
2808 #I remember recently being scolded for assigning config values like this
2809 $class->config->{home} ||= $home;
2810 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2814 =head2 $c->setup_log
2816 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2817 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2820 This method also installs a C<debug> method that returns a true value into the
2821 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2822 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2824 Note that if the log has already been setup, by either a previous call to
2825 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2826 that this method won't actually set up the log object.
2831 my ( $class, $levels ) = @_;
2834 $levels =~ s/^\s+//;
2835 $levels =~ s/\s+$//;
2836 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2838 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2839 if ( defined $env_debug ) {
2840 $levels{debug} = 1 if $env_debug; # Ugly!
2841 delete($levels{debug}) unless $env_debug;
2844 unless ( $class->log ) {
2845 $class->log( Catalyst::Log->new(keys %levels) );
2848 if ( $levels{debug} ) {
2849 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2850 $class->log->debug('Debug messages enabled');
2854 =head2 $c->setup_plugins
2860 =head2 $c->setup_stats
2862 Sets up timing statistics class.
2867 my ( $class, $stats ) = @_;
2869 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2871 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2872 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2873 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2874 $class->log->debug('Statistics enabled');
2879 =head2 $c->registered_plugins
2881 Returns a sorted list of the plugins which have either been stated in the
2884 If passed a given plugin name, it will report a boolean value indicating
2885 whether or not that plugin is loaded. A fully qualified name is required if
2886 the plugin name does not begin with C<Catalyst::Plugin::>.
2888 if ($c->registered_plugins('Some::Plugin')) {
2896 sub registered_plugins {
2898 return sort keys %{ $proto->_plugins } unless @_;
2900 return 1 if exists $proto->_plugins->{$plugin};
2901 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2904 sub _register_plugin {
2905 my ( $proto, $plugin, $instant ) = @_;
2906 my $class = ref $proto || $proto;
2908 Class::MOP::load_class( $plugin );
2909 $class->log->warn( "$plugin inherits from 'Catalyst::Component' - this is deprecated and will not work in 5.81" )
2910 if $plugin->isa( 'Catalyst::Component' );
2911 $proto->_plugins->{$plugin} = 1;
2913 my $meta = Class::MOP::get_metaclass_by_name($class);
2914 $meta->superclasses($plugin, $meta->superclasses);
2920 my ( $class, $plugins ) = @_;
2922 $class->_plugins( {} ) unless $class->_plugins;
2923 $plugins = Data::OptList::mkopt($plugins || []);
2926 [ Catalyst::Utils::resolve_namespace(
2927 $class . '::Plugin',
2928 'Catalyst::Plugin', $_->[0]
2934 for my $plugin ( reverse @plugins ) {
2935 Class::MOP::load_class($plugin->[0], $plugin->[1]);
2936 my $meta = find_meta($plugin->[0]);
2937 next if $meta && $meta->isa('Moose::Meta::Role');
2939 $class->_register_plugin($plugin->[0]);
2943 map { $_->[0]->name, $_->[1] }
2944 grep { blessed($_->[0]) && $_->[0]->isa('Moose::Meta::Role') }
2945 map { [find_meta($_->[0]), $_->[1]] }
2948 Moose::Util::apply_all_roles(
2956 Returns an arrayref of the internal execution stack (actions that are
2957 currently executing).
2961 Returns the current timing statistics object. By default Catalyst uses
2962 L<Catalyst::Stats|Catalyst::Stats>, but can be set otherwise with
2963 L<< stats_class|/"$c->stats_class" >>.
2965 Even if L<< -Stats|/"-Stats" >> is not enabled, the stats object is still
2966 available. By enabling it with C< $c->stats->enabled(1) >, it can be used to
2967 profile explicitly, although MyApp.pm still won't profile nor output anything
2970 =head2 $c->stats_class
2972 Returns or sets the stats (timing statistics) class. L<Catalyst::Stats|Catalyst::Stats> is used by default.
2974 =head2 $c->use_stats
2976 Returns 1 when L<< stats collection|/"-Stats" >> is enabled.
2978 Note that this is a static method, not an accessor and should be overridden
2979 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2986 =head2 $c->write( $data )
2988 Writes $data to the output stream. When using this method directly, you
2989 will need to manually set the C<Content-Length> header to the length of
2990 your output data, if known.
2997 # Finalize headers if someone manually writes output
2998 $c->finalize_headers;
3000 return $c->engine->write( $c, @_ );
3005 Returns the Catalyst version number. Mostly useful for "powered by"
3006 messages in template systems.
3010 sub version { return $Catalyst::VERSION }
3012 =head1 CONFIGURATION
3014 There are a number of 'base' config variables which can be set:
3020 C<default_model> - The default model picked if you say C<< $c->model >>. See L<< /$c->model($name) >>.
3024 C<default_view> - The default view to be rendered or returned when C<< $c->view >> is called. See L<< /$c->view($name) >>.
3028 C<disable_component_resolution_regex_fallback> - Turns
3029 off the deprecated component resolution functionality so
3030 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
3031 are called then regex search will not be attempted on string values and
3032 instead C<undef> will be returned.
3036 C<home> - The application home directory. In an uninstalled application,
3037 this is the top level application directory. In an installed application,
3038 this will be the directory containing C<< MyApp.pm >>.
3042 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
3046 C<name> - The name of the application in debug messages and the debug and
3051 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
3052 until it is accessed. This allows you to (for example) check authentication (and reject
3053 the upload) before actually receiving all the data. See L</ON-DEMAND PARSER>
3057 C<root> - The root directory for templates. Usually this is just a
3058 subdirectory of the home directory, but you can set it to change the
3059 templates to a different directory.
3063 C<search_extra> - Array reference passed to Module::Pluggable to for additional
3064 namespaces from which components will be loaded (and constructed and stored in
3065 C<< $c->components >>).
3069 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
3070 to be shown in hit debug tables in the test server.
3074 C<use_request_uri_for_path> - Controls if the C<REQUEST_URI> or C<PATH_INFO> environment
3075 variable should be used for determining the request path.
3077 Most web server environments pass the requested path to the application using environment variables,
3078 from which Catalyst has to reconstruct the request base (i.e. the top level path to / in the application,
3079 exposed as C<< $c->request->base >>) and the request path below that base.
3081 There are two methods of doing this, both of which have advantages and disadvantages. Which method is used
3082 is determined by the C<< $c->config(use_request_uri_for_path) >> setting (which can either be true or false).
3086 =item use_request_uri_for_path => 0
3088 This is the default (and the) traditional method that Catalyst has used for determining the path information.
3089 The path is generated from a combination of the C<PATH_INFO> and C<SCRIPT_NAME> environment variables.
3090 The allows the application to behave correctly when C<mod_rewrite> is being used to redirect requests
3091 into the application, as these variables are adjusted by mod_rewrite to take account for the redirect.
3093 However this method has the major disadvantage that it is impossible to correctly decode some elements
3094 of the path, as RFC 3875 says: "C<< Unlike a URI path, the PATH_INFO is not URL-encoded, and cannot
3095 contain path-segment parameters. >>" This means PATH_INFO is B<always> decoded, and therefore Catalyst
3096 can't distinguish / vs %2F in paths (in addition to other encoded values).
3098 =item use_request_uri_for_path => 1
3100 This method uses the C<REQUEST_URI> and C<SCRIPT_NAME> environment variables. As C<REQUEST_URI> is never
3101 decoded, this means that applications using this mode can correctly handle URIs including the %2F character
3102 (i.e. with C<AllowEncodedSlashes> set to C<On> in Apache).
3104 Given that this method of path resolution is provably more correct, it is recommended that you use
3105 this unless you have a specific need to deploy your application in a non-standard environment, and you are
3106 aware of the implications of not being able to handle encoded URI paths correctly.
3108 However it also means that in a number of cases when the app isn't installed directly at a path, but instead
3109 is having paths rewritten into it (e.g. as a .cgi/fcgi in a public_html directory, with mod_rewrite in a
3110 .htaccess file, or when SSI is used to rewrite pages into the app, or when sub-paths of the app are exposed
3111 at other URIs than that which the app is 'normally' based at with C<mod_rewrite>), the resolution of
3112 C<< $c->request->base >> will be incorrect.
3118 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
3122 =head1 INTERNAL ACTIONS
3124 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
3125 C<_ACTION>, and C<_END>. These are by default not shown in the private
3126 action table, but you can make them visible with a config parameter.
3128 MyApp->config(show_internal_actions => 1);
3130 =head1 ON-DEMAND PARSER
3132 The request body is usually parsed at the beginning of a request,
3133 but if you want to handle input yourself, you can enable on-demand
3134 parsing with a config parameter.
3136 MyApp->config(parse_on_demand => 1);
3138 =head1 PROXY SUPPORT
3140 Many production servers operate using the common double-server approach,
3141 with a lightweight frontend web server passing requests to a larger
3142 backend server. An application running on the backend server must deal
3143 with two problems: the remote user always appears to be C<127.0.0.1> and
3144 the server's hostname will appear to be C<localhost> regardless of the
3145 virtual host that the user connected through.
3147 Catalyst will automatically detect this situation when you are running
3148 the frontend and backend servers on the same machine. The following
3149 changes are made to the request.
3151 $c->req->address is set to the user's real IP address, as read from
3152 the HTTP X-Forwarded-For header.
3154 The host value for $c->req->base and $c->req->uri is set to the real
3155 host, as read from the HTTP X-Forwarded-Host header.
3157 Additionally, you may be running your backend application on an insecure
3158 connection (port 80) while your frontend proxy is running under SSL. If there
3159 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
3160 tell Catalyst what port the frontend listens on. This will allow all URIs to
3161 be created properly.
3163 In the case of passing in:
3165 X-Forwarded-Port: 443
3167 All calls to C<uri_for> will result in an https link, as is expected.
3169 Obviously, your web server must support these headers for this to work.
3171 In a more complex server farm environment where you may have your
3172 frontend proxy server(s) on different machines, you will need to set a
3173 configuration option to tell Catalyst to read the proxied data from the
3176 MyApp->config(using_frontend_proxy => 1);
3178 If you do not wish to use the proxy support at all, you may set:
3180 MyApp->config(ignore_frontend_proxy => 0);
3182 =head2 Note about psgi files
3184 Note that if you supply your own .psgi file, calling
3185 C<< MyApp->psgi_app(@_); >>, then B<this will not happen automatically>.
3187 You either need to apply L<Plack::Middleware::ReverseProxy> yourself
3188 in your psgi, for example:
3191 enable "Plack::Middleware::ReverseProxy";
3195 This will unconditionally add the ReverseProxy support, or you need to call
3196 C<< $app = MyApp->apply_default_middlewares($app) >> (to conditionally
3197 apply the support depending upon your config).
3199 See L<Catalyst::PSGI> for more information.
3201 =head1 THREAD SAFETY
3203 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
3204 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
3205 believe the Catalyst core to be thread-safe.
3207 If you plan to operate in a threaded environment, remember that all other
3208 modules you are using must also be thread-safe. Some modules, most notably
3209 L<DBD::SQLite>, are not thread-safe.
3215 Join #catalyst on irc.perl.org.
3219 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
3220 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
3224 http://catalyst.perl.org
3228 http://dev.catalyst.perl.org
3232 =head2 L<Task::Catalyst> - All you need to start with Catalyst
3234 =head2 L<Catalyst::Manual> - The Catalyst Manual
3236 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
3238 =head2 L<Catalyst::Engine> - Core engine
3240 =head2 L<Catalyst::Log> - Log class.
3242 =head2 L<Catalyst::Request> - Request object
3244 =head2 L<Catalyst::Response> - Response object
3246 =head2 L<Catalyst::Test> - The test suite.
3250 =head1 PROJECT FOUNDER
3252 sri: Sebastian Riedel <sri@cpan.org>
3258 acme: Leon Brocard <leon@astray.com>
3260 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
3264 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
3268 andyg: Andy Grundman <andy@hybridized.org>
3270 audreyt: Audrey Tang
3272 bricas: Brian Cassidy <bricas@cpan.org>
3274 Caelum: Rafael Kitover <rkitover@io.com>
3276 chansen: Christian Hansen
3278 chicks: Christopher Hicks
3280 Chisel Wright C<pause@herlpacker.co.uk>
3282 Danijel Milicevic C<me@danijel.de>
3284 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
3286 David Naughton, C<naughton@umn.edu>
3290 dhoss: Devin Austin <dhoss@cpan.org>
3292 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
3296 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
3298 esskar: Sascha Kiefer
3300 fireartist: Carl Franks <cfranks@cpan.org>
3302 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
3304 gabb: Danijel Milicevic
3308 Gavin Henry C<ghenry@perl.me.uk>
3312 groditi: Guillermo Roditi <groditi@gmail.com>
3314 hobbs: Andrew Rodland <andrew@cleverdomain.org>
3316 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
3318 jcamacho: Juan Camacho
3320 jester: Jesse Sheidlower C<jester@panix.com>
3322 jhannah: Jay Hannah <jay@jays.net>
3328 jon: Jon Schutz <jjschutz@cpan.org>
3330 Jonathan Rockway C<< <jrockway@cpan.org> >>
3332 Kieren Diment C<kd@totaldatasolution.com>
3334 konobi: Scott McWhirter <konobi@cpan.org>
3336 marcus: Marcus Ramberg <mramberg@cpan.org>
3338 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
3340 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
3344 naughton: David Naughton
3346 ningu: David Kamholz <dkamholz@cpan.org>
3348 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
3350 numa: Dan Sully <daniel@cpan.org>
3356 omega: Andreas Marienborg
3358 Oleg Kostyuk <cub.uanic@gmail.com>
3360 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
3362 rafl: Florian Ragwitz <rafl@debian.org>
3364 random: Roland Lammel <lammel@cpan.org>
3366 Robert Sedlacek C<< <rs@474.at> >>
3368 SpiceMan: Marcel Montes
3372 szbalint: Balint Szilakszi <szbalint@cpan.org>
3374 t0m: Tomas Doran <bobtfish@bobtfish.net>
3378 Viljo Marrandi C<vilts@yahoo.com>
3380 Will Hawes C<info@whawes.co.uk>
3382 willert: Sebastian Willert <willert@cpan.org>
3384 wreis: Wallace Reis <wallace@reis.org.br>
3386 Yuval Kogman, C<nothingmuch@woobling.org>
3388 rainboxx: Matthias Dietrich, C<perl@rainboxx.de>
3390 dd070: Dhaval Dhanani <dhaval070@gmail.com>
3396 Copyright (c) 2005, the above named PROJECT FOUNDER and CONTRIBUTORS.
3400 This library is free software. You can redistribute it and/or modify it under
3401 the same terms as Perl itself.
3407 __PACKAGE__->meta->make_immutable;