4 use Moose::Meta::Class ();
5 extends 'Catalyst::Component';
6 use Moose::Util qw/find_meta/;
8 use B::Hooks::EndOfScope ();
9 use Catalyst::Exception;
10 use Catalyst::Exception::Detach;
11 use Catalyst::Exception::Go;
13 use Catalyst::Request;
14 use Catalyst::Request::Upload;
15 use Catalyst::Response;
17 use Catalyst::Controller;
18 use Devel::InnerPackage ();
20 use Module::Pluggable::Object ();
21 use Text::SimpleTable ();
22 use Path::Class::Dir ();
23 use Path::Class::File ();
27 use Tree::Simple qw/use_weak_refs/;
28 use Tree::Simple::Visitor::FindByUID;
29 use Class::C3::Adopt::NEXT;
30 use List::MoreUtils qw/uniq/;
33 use Carp qw/croak carp shortmess/;
35 BEGIN { require 5.008004; }
37 has stack => (is => 'ro', default => sub { [] });
38 has stash => (is => 'rw', default => sub { {} });
39 has state => (is => 'rw', default => 0);
40 has stats => (is => 'rw');
41 has action => (is => 'rw');
42 has counter => (is => 'rw', default => sub { {} });
43 has request => (is => 'rw', default => sub { $_[0]->request_class->new({}) }, required => 1, lazy => 1);
44 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
45 has namespace => (is => 'rw');
47 sub depth { scalar @{ shift->stack || [] }; }
48 sub comp { shift->component(@_) }
51 my $self = shift; return $self->request(@_);
54 my $self = shift; return $self->response(@_);
57 # For backwards compatibility
58 sub finalize_output { shift->finalize_body(@_) };
63 our $RECURSION = 1000;
64 our $DETACH = Catalyst::Exception::Detach->new;
65 our $GO = Catalyst::Exception::Go->new;
67 #I imagine that very few of these really need to be class variables. if any.
68 #maybe we should just make them attributes with a default?
69 __PACKAGE__->mk_classdata($_)
70 for qw/components arguments dispatcher engine log dispatcher_class
71 engine_class context_class request_class response_class stats_class
74 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
75 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
76 __PACKAGE__->request_class('Catalyst::Request');
77 __PACKAGE__->response_class('Catalyst::Response');
78 __PACKAGE__->stats_class('Catalyst::Stats');
80 # Remember to update this in Catalyst::Runtime as well!
82 our $VERSION = '5.80013';
85 my $dev_version = $VERSION =~ /_\d{2}$/;
86 *_IS_DEVELOPMENT_VERSION = sub () { $dev_version };
89 $VERSION = eval $VERSION;
92 my ( $class, @arguments ) = @_;
94 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
96 return unless $class eq 'Catalyst';
98 my $caller = caller();
99 return if $caller eq 'main';
101 # Kill Adopt::NEXT warnings if we're a non-RC version
102 unless (_IS_DEVELOPMENT_VERSION()) {
103 Class::C3::Adopt::NEXT->unimport(qr/^Catalyst::/);
106 my $meta = Moose::Meta::Class->initialize($caller);
107 unless ( $caller->isa('Catalyst') ) {
108 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Controller');
109 $meta->superclasses(@superclasses);
111 # Avoid possible C3 issues if 'Moose::Object' is already on RHS of MyApp
112 $meta->superclasses(grep { $_ ne 'Moose::Object' } $meta->superclasses);
114 unless( $meta->has_method('meta') ){
115 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
118 $caller->arguments( [@arguments] );
122 sub _application { $_[0] }
126 Catalyst - The Elegant MVC Web Application Framework
130 See the L<Catalyst::Manual> distribution for comprehensive
131 documentation and tutorials.
133 # Install Catalyst::Devel for helpers and other development tools
134 # use the helper to create a new application
137 # add models, views, controllers
138 script/myapp_create.pl model MyDatabase DBIC::Schema create=static dbi:SQLite:/path/to/db
139 script/myapp_create.pl view MyTemplate TT
140 script/myapp_create.pl controller Search
142 # built in testserver -- use -r to restart automatically on changes
143 # --help to see all available options
144 script/myapp_server.pl
146 # command line testing interface
147 script/myapp_test.pl /yada
150 use Catalyst qw/-Debug/; # include plugins here as well
152 ### In lib/MyApp/Controller/Root.pm (autocreated)
153 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
154 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
155 $c->stash->{template} = 'foo.tt'; # set the template
156 # lookup something from db -- stash vars are passed to TT
158 $c->model('Database::Foo')->search( { country => $args[0] } );
159 if ( $c->req->params->{bar} ) { # access GET or POST parameters
160 $c->forward( 'bar' ); # process another action
161 # do something else after forward returns
165 # The foo.tt TT template can use the stash data from the database
166 [% WHILE (item = data.next) %]
170 # called for /bar/of/soap, /bar/of/soap/10, etc.
171 sub bar : Path('/bar/of/soap') { ... }
173 # called for all actions, from the top-most controller downwards
175 my ( $self, $c ) = @_;
176 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
177 $c->res->redirect( '/login' ); # require login
178 return 0; # abort request and go immediately to end()
180 return 1; # success; carry on to next action
183 # called after all actions are finished
185 my ( $self, $c ) = @_;
186 if ( scalar @{ $c->error } ) { ... } # handle errors
187 return if $c->res->body; # already have a response
188 $c->forward( 'MyApp::View::TT' ); # render template
191 ### in MyApp/Controller/Foo.pm
192 # called for /foo/bar
193 sub bar : Local { ... }
195 # called for /blargle
196 sub blargle : Global { ... }
198 # an index action matches /foo, but not /foo/1, etc.
199 sub index : Private { ... }
201 ### in MyApp/Controller/Foo/Bar.pm
202 # called for /foo/bar/baz
203 sub baz : Local { ... }
205 # first Root auto is called, then Foo auto, then this
206 sub auto : Private { ... }
208 # powerful regular expression paths are also possible
209 sub details : Regex('^product/(\w+)/details$') {
210 my ( $self, $c ) = @_;
211 # extract the (\w+) from the URI
212 my $product = $c->req->captures->[0];
215 See L<Catalyst::Manual::Intro> for additional information.
219 Catalyst is a modern framework for making web applications without the
220 pain usually associated with this process. This document is a reference
221 to the main Catalyst application. If you are a new user, we suggest you
222 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
224 See L<Catalyst::Manual> for more documentation.
226 Catalyst plugins can be loaded by naming them as arguments to the "use
227 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
228 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
231 use Catalyst qw/My::Module/;
233 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
234 fully qualify the name by using a unary plus:
238 +Fully::Qualified::Plugin::Name
241 Special flags like C<-Debug> and C<-Engine> can also be specified as
242 arguments when Catalyst is loaded:
244 use Catalyst qw/-Debug My::Module/;
246 The position of plugins and flags in the chain is important, because
247 they are loaded in the order in which they appear.
249 The following flags are supported:
253 Enables debug output. You can also force this setting from the system
254 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
255 settings override the application, with <MYAPP>_DEBUG having the highest
260 Forces Catalyst to use a specific engine. Omit the
261 C<Catalyst::Engine::> prefix of the engine name, i.e.:
263 use Catalyst qw/-Engine=CGI/;
267 Forces Catalyst to use a specific home directory, e.g.:
269 use Catalyst qw[-Home=/usr/mst];
271 This can also be done in the shell environment by setting either the
272 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
273 is replaced with the uppercased name of your application, any "::" in
274 the name will be replaced with underscores, e.g. MyApp::Web should use
275 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
279 use Catalyst '-Log=warn,fatal,error';
281 Specifies a comma-delimited list of log levels.
285 Enables statistics collection and reporting. You can also force this setting
286 from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
287 environment settings override the application, with <MYAPP>_STATS having the
292 use Catalyst qw/-Stats=1/
296 =head2 INFORMATION ABOUT THE CURRENT REQUEST
300 Returns a L<Catalyst::Action> object for the current action, which
301 stringifies to the action name. See L<Catalyst::Action>.
305 Returns the namespace of the current action, i.e., the URI prefix
306 corresponding to the controller of the current action. For example:
308 # in Controller::Foo::Bar
309 $c->namespace; # returns 'foo/bar';
315 Returns the current L<Catalyst::Request> object, giving access to
316 information about the current client request (including parameters,
317 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
319 =head2 REQUEST FLOW HANDLING
321 =head2 $c->forward( $action [, \@arguments ] )
323 =head2 $c->forward( $class, $method, [, \@arguments ] )
325 Forwards processing to another action, by its private name. If you give a
326 class name but no method, C<process()> is called. You may also optionally
327 pass arguments in an arrayref. The action will receive the arguments in
328 C<@_> and C<< $c->req->args >>. Upon returning from the function,
329 C<< $c->req->args >> will be restored to the previous values.
331 Any data C<return>ed from the action forwarded to, will be returned by the
334 my $foodata = $c->forward('/foo');
335 $c->forward('index');
336 $c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/);
337 $c->forward('MyApp::View::TT');
339 Note that L<< forward|/"$c->forward( $action [, \@arguments ] )" >> implies
340 an C<< eval { } >> around the call (actually
341 L<< execute|/"$c->execute( $class, $coderef )" >> does), thus de-fatalizing
342 all 'dies' within the called action. If you want C<die> to propagate you
343 need to do something like:
346 die $c->error if $c->error;
348 Or make sure to always return true values from your actions and write
351 $c->forward('foo') || return;
353 Another note is that C<< $c->forward >> always returns a scalar because it
354 actually returns $c->state which operates in a scalar context.
355 Thus, something like:
359 in an action that is forwarded to is going to return a scalar,
360 i.e. how many items are in that array, which is probably not what you want.
361 If you need to return an array then return a reference to it,
364 $c->stash->{array} = \@array;
366 and access it from the stash.
370 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
372 =head2 $c->detach( $action [, \@arguments ] )
374 =head2 $c->detach( $class, $method, [, \@arguments ] )
378 The same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, but
379 doesn't return to the previous action when processing is finished.
381 When called with no arguments it escapes the processing chain entirely.
385 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
387 =head2 $c->visit( $action [, \@captures, \@arguments ] )
389 =head2 $c->visit( $class, $method, [, \@captures, \@arguments ] )
391 Almost the same as L<< forward|/"$c->forward( $action [, \@arguments ] )" >>,
392 but does a full dispatch, instead of just calling the new C<$action> /
393 C<< $class->$method >>. This means that C<begin>, C<auto> and the method
394 you go to are called, just like a new request.
396 In addition both C<< $c->action >> and C<< $c->namespace >> are localized.
397 This means, for example, that C<< $c->action >> methods such as
398 L<name|Catalyst::Action/name>, L<class|Catalyst::Action/class> and
399 L<reverse|Catalyst::Action/reverse> return information for the visited action
400 when they are invoked within the visited action. This is different from the
401 behavior of L<< forward|/"$c->forward( $action [, \@arguments ] )" >>, which
402 continues to use the $c->action object from the caller action even when
403 invoked from the callee.
405 C<< $c->stash >> is kept unchanged.
407 In effect, L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >>
408 allows you to "wrap" another action, just as it would have been called by
409 dispatching from a URL, while the analogous
410 L<< go|/"$c->go( $action [, \@captures, \@arguments ] )" >> allows you to
411 transfer control to another action as if it had been reached directly from a URL.
415 sub visit { my $c = shift; $c->dispatcher->visit( $c, @_ ) }
417 =head2 $c->go( $action [, \@captures, \@arguments ] )
419 =head2 $c->go( $class, $method, [, \@captures, \@arguments ] )
421 The relationship between C<go> and
422 L<< visit|/"$c->visit( $action [, \@captures, \@arguments ] )" >> is the same as
423 the relationship between
424 L<< forward|/"$c->forward( $class, $method, [, \@arguments ] )" >> and
425 L<< detach|/"$c->detach( $action [, \@arguments ] )" >>. Like C<< $c->visit >>,
426 C<< $c->go >> will perform a full dispatch on the specified action or method,
427 with localized C<< $c->action >> and C<< $c->namespace >>. Like C<detach>,
428 C<go> escapes the processing of the current request chain on completion, and
429 does not return to its caller.
433 sub go { my $c = shift; $c->dispatcher->go( $c, @_ ) }
439 Returns the current L<Catalyst::Response> object, see there for details.
443 Returns a hashref to the stash, which may be used to store data and pass
444 it between components during a request. You can also set hash keys by
445 passing arguments. The stash is automatically sent to the view. The
446 stash is cleared at the end of a request; it cannot be used for
447 persistent storage (for this you must use a session; see
448 L<Catalyst::Plugin::Session> for a complete system integrated with
451 $c->stash->{foo} = $bar;
452 $c->stash( { moose => 'majestic', qux => 0 } );
453 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
455 # stash is automatically passed to the view for use in a template
456 $c->forward( 'MyApp::View::TT' );
460 around stash => sub {
463 my $stash = $orig->($c);
465 my $new_stash = @_ > 1 ? {@_} : $_[0];
466 croak('stash takes a hash or hashref') unless ref $new_stash;
467 foreach my $key ( keys %$new_stash ) {
468 $stash->{$key} = $new_stash->{$key};
478 =head2 $c->error($error, ...)
480 =head2 $c->error($arrayref)
482 Returns an arrayref containing error messages. If Catalyst encounters an
483 error while processing a request, it stores the error in $c->error. This
484 method should only be used to store fatal error messages.
486 my @error = @{ $c->error };
490 $c->error('Something bad happened');
497 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
498 croak @$error unless ref $c;
499 push @{ $c->{error} }, @$error;
501 elsif ( defined $_[0] ) { $c->{error} = undef }
502 return $c->{error} || [];
508 Contains the return value of the last executed action.
509 Note that << $c->state >> operates in a scalar context which means that all
510 values it returns are scalar.
512 =head2 $c->clear_errors
514 Clear errors. You probably don't want to clear the errors unless you are
515 implementing a custom error screen.
517 This is equivalent to running
528 sub _comp_search_prefixes {
530 return map $c->components->{ $_ }, $c->_comp_names_search_prefixes(@_);
533 # search components given a name and some prefixes
534 sub _comp_names_search_prefixes {
535 my ( $c, $name, @prefixes ) = @_;
536 my $appclass = ref $c || $c;
537 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
538 $filter = qr/$filter/; # Compile regex now rather than once per loop
540 # map the original component name to the sub part that we will search against
541 my %eligible = map { my $n = $_; $n =~ s{^$appclass\::[^:]+::}{}; $_ => $n; }
542 grep { /$filter/ } keys %{ $c->components };
544 # undef for a name will return all
545 return keys %eligible if !defined $name;
547 my $query = ref $name ? $name : qr/^$name$/i;
548 my @result = grep { $eligible{$_} =~ m{$query} } keys %eligible;
550 return @result if @result;
552 # if we were given a regexp to search against, we're done.
555 # skip regexp fallback if configured
557 if $appclass->config->{disable_component_resolution_regex_fallback};
561 @result = grep { $eligible{ $_ } =~ m{$query} } keys %eligible;
563 # no results? try against full names
565 @result = grep { m{$query} } keys %eligible;
568 # don't warn if we didn't find any results, it just might not exist
570 # Disgusting hack to work out correct method name
571 my $warn_for = lc $prefixes[0];
572 my $msg = "Used regexp fallback for \$c->${warn_for}('${name}'), which found '" .
573 (join '", "', @result) . "'. Relying on regexp fallback behavior for " .
574 "component resolution is unreliable and unsafe.";
575 my $short = $result[0];
576 # remove the component namespace prefix
577 $short =~ s/.*?(Model|Controller|View):://;
578 my $shortmess = Carp::shortmess('');
579 if ($shortmess =~ m#Catalyst/Plugin#) {
580 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
582 } elsif ($shortmess =~ m#Catalyst/lib/(View|Controller)#) {
583 $msg .= " You probably need to set '$short' instead of '${name}' in this " .
584 "component's config";
586 $msg .= " You probably meant \$c->${warn_for}('$short') instead of \$c->${warn_for}('${name}'), " .
587 "but if you really wanted to search, pass in a regexp as the argument " .
588 "like so: \$c->${warn_for}(qr/${name}/)";
590 $c->log->warn( "${msg}$shortmess" );
596 # Find possible names for a prefix
598 my ( $c, @prefixes ) = @_;
599 my $appclass = ref $c || $c;
601 my $filter = "^${appclass}::(" . join( '|', @prefixes ) . ')::';
603 my @names = map { s{$filter}{}; $_; }
604 $c->_comp_names_search_prefixes( undef, @prefixes );
609 # Filter a component before returning by calling ACCEPT_CONTEXT if available
610 sub _filter_component {
611 my ( $c, $comp, @args ) = @_;
613 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
614 return $comp->ACCEPT_CONTEXT( $c, @args );
620 =head2 COMPONENT ACCESSORS
622 =head2 $c->controller($name)
624 Gets a L<Catalyst::Controller> instance by name.
626 $c->controller('Foo')->do_stuff;
628 If the name is omitted, will return the controller for the dispatched
631 If you want to search for controllers, pass in a regexp as the argument.
633 # find all controllers that start with Foo
634 my @foo_controllers = $c->controller(qr{^Foo});
640 my ( $c, $name, @args ) = @_;
643 my @result = $c->_comp_search_prefixes( $name, qw/Controller C/ );
644 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
645 return $c->_filter_component( $result[ 0 ], @args );
648 return $c->component( $c->action->class );
651 =head2 $c->model($name)
653 Gets a L<Catalyst::Model> instance by name.
655 $c->model('Foo')->do_stuff;
657 Any extra arguments are directly passed to ACCEPT_CONTEXT.
659 If the name is omitted, it will look for
660 - a model object in $c->stash->{current_model_instance}, then
661 - a model name in $c->stash->{current_model}, then
662 - a config setting 'default_model', or
663 - check if there is only one model, and return it if that's the case.
665 If you want to search for models, pass in a regexp as the argument.
667 # find all models that start with Foo
668 my @foo_models = $c->model(qr{^Foo});
673 my ( $c, $name, @args ) = @_;
674 my $appclass = ref($c) || $c;
676 my @result = $c->_comp_search_prefixes( $name, qw/Model M/ );
677 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
678 return $c->_filter_component( $result[ 0 ], @args );
682 return $c->stash->{current_model_instance}
683 if $c->stash->{current_model_instance};
684 return $c->model( $c->stash->{current_model} )
685 if $c->stash->{current_model};
687 return $c->model( $appclass->config->{default_model} )
688 if $appclass->config->{default_model};
690 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/Model M/);
693 $c->log->warn( Carp::shortmess('Calling $c->model() will return a random model unless you specify one of:') );
694 $c->log->warn( '* $c->config(default_model => "the name of the default model to use")' );
695 $c->log->warn( '* $c->stash->{current_model} # the name of the model to use for this request' );
696 $c->log->warn( '* $c->stash->{current_model_instance} # the instance of the model to use for this request' );
697 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
700 return $c->_filter_component( $comp );
704 =head2 $c->view($name)
706 Gets a L<Catalyst::View> instance by name.
708 $c->view('Foo')->do_stuff;
710 Any extra arguments are directly passed to ACCEPT_CONTEXT.
712 If the name is omitted, it will look for
713 - a view object in $c->stash->{current_view_instance}, then
714 - a view name in $c->stash->{current_view}, then
715 - a config setting 'default_view', or
716 - check if there is only one view, and return it if that's the case.
718 If you want to search for views, pass in a regexp as the argument.
720 # find all views that start with Foo
721 my @foo_views = $c->view(qr{^Foo});
726 my ( $c, $name, @args ) = @_;
728 my $appclass = ref($c) || $c;
730 my @result = $c->_comp_search_prefixes( $name, qw/View V/ );
731 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
732 return $c->_filter_component( $result[ 0 ], @args );
736 return $c->stash->{current_view_instance}
737 if $c->stash->{current_view_instance};
738 return $c->view( $c->stash->{current_view} )
739 if $c->stash->{current_view};
741 return $c->view( $appclass->config->{default_view} )
742 if $appclass->config->{default_view};
744 my( $comp, $rest ) = $c->_comp_search_prefixes( undef, qw/View V/);
747 $c->log->warn( 'Calling $c->view() will return a random view unless you specify one of:' );
748 $c->log->warn( '* $c->config(default_view => "the name of the default view to use")' );
749 $c->log->warn( '* $c->stash->{current_view} # the name of the view to use for this request' );
750 $c->log->warn( '* $c->stash->{current_view_instance} # the instance of the view to use for this request' );
751 $c->log->warn( 'NB: in version 5.81, the "random" behavior will not work at all.' );
754 return $c->_filter_component( $comp );
757 =head2 $c->controllers
759 Returns the available names which can be passed to $c->controller
765 return $c->_comp_names(qw/Controller C/);
770 Returns the available names which can be passed to $c->model
776 return $c->_comp_names(qw/Model M/);
782 Returns the available names which can be passed to $c->view
788 return $c->_comp_names(qw/View V/);
791 =head2 $c->comp($name)
793 =head2 $c->component($name)
795 Gets a component object by name. This method is not recommended,
796 unless you want to get a specific component by full
797 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
798 should be used instead.
800 If C<$name> is a regexp, a list of components matched against the full
801 component name will be returned.
803 If Catalyst can't find a component by name, it will fallback to regex
804 matching by default. To disable this behaviour set
805 disable_component_resolution_regex_fallback to a true value.
807 __PACKAGE__->config( disable_component_resolution_regex_fallback => 1 );
812 my ( $c, $name, @args ) = @_;
815 my $comps = $c->components;
818 # is it the exact name?
819 return $c->_filter_component( $comps->{ $name }, @args )
820 if exists $comps->{ $name };
822 # perhaps we just omitted "MyApp"?
823 my $composed = ( ref $c || $c ) . "::${name}";
824 return $c->_filter_component( $comps->{ $composed }, @args )
825 if exists $comps->{ $composed };
827 # search all of the models, views and controllers
828 my( $comp ) = $c->_comp_search_prefixes( $name, qw/Model M Controller C View V/ );
829 return $c->_filter_component( $comp, @args ) if $comp;
832 # This is here so $c->comp( '::M::' ) works
833 my $query = ref $name ? $name : qr{$name}i;
835 my @result = grep { m{$query} } keys %{ $c->components };
836 return map { $c->_filter_component( $_, @args ) } @result if ref $name;
839 $c->log->warn( Carp::shortmess(qq(Found results for "${name}" using regexp fallback)) );
840 $c->log->warn( 'Relying on the regexp fallback behavior for component resolution' );
841 $c->log->warn( 'is unreliable and unsafe. You have been warned' );
842 return $c->_filter_component( $result[ 0 ], @args );
845 # I would expect to return an empty list here, but that breaks back-compat
849 return sort keys %{ $c->components };
852 =head2 CLASS DATA AND HELPER CLASSES
856 Returns or takes a hashref containing the application's configuration.
858 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
860 You can also use a C<YAML>, C<XML> or L<Config::General> config file
861 like C<myapp.conf> in your applications home directory. See
862 L<Catalyst::Plugin::ConfigLoader>.
864 =head3 Cascading configuration
866 The config method is present on all Catalyst components, and configuration
867 will be merged when an application is started. Configuration loaded with
868 L<Catalyst::Plugin::ConfigLoader> takes precedence over other configuration,
869 followed by configuration in your top level C<MyApp> class. These two
870 configurations are merged, and then configuration data whose hash key matches a
871 component name is merged with configuration for that component.
873 The configuration for a component is then passed to the C<new> method when a
874 component is constructed.
878 MyApp->config({ 'Model::Foo' => { bar => 'baz', overrides => 'me' } });
879 MyApp::Model::Foo->config({ quux => 'frob', 'overrides => 'this' });
881 will mean that C<MyApp::Model::Foo> receives the following data when
884 MyApp::Model::Foo->new({
892 around config => sub {
896 croak('Setting config after setup has been run is not allowed.')
897 if ( @_ and $c->setup_finished );
904 Returns the logging object instance. Unless it is already set, Catalyst
905 sets this up with a L<Catalyst::Log> object. To use your own log class,
906 set the logger with the C<< __PACKAGE__->log >> method prior to calling
907 C<< __PACKAGE__->setup >>.
909 __PACKAGE__->log( MyLogger->new );
914 $c->log->info( 'Now logging with my own logger!' );
916 Your log class should implement the methods described in
922 Returns 1 if debug mode is enabled, 0 otherwise.
924 You can enable debug mode in several ways:
928 =item By calling myapp_server.pl with the -d flag
930 =item With the environment variables MYAPP_DEBUG, or CATALYST_DEBUG
932 =item The -Debug option in your MyApp.pm
934 =item By declaring C<sub debug { 1 }> in your MyApp.pm.
938 Calling C<< $c->debug(1) >> has no effect.
944 =head2 $c->dispatcher
946 Returns the dispatcher instance. See L<Catalyst::Dispatcher>.
950 Returns the engine instance. See L<Catalyst::Engine>.
953 =head2 UTILITY METHODS
955 =head2 $c->path_to(@path)
957 Merges C<@path> with C<< $c->config->{home} >> and returns a
958 L<Path::Class::Dir> object. Note you can usually use this object as
959 a filename, but sometimes you will have to explicitly stringify it
960 yourself by calling the C<< ->stringify >> method.
964 $c->path_to( 'db', 'sqlite.db' );
969 my ( $c, @path ) = @_;
970 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
971 if ( -d $path ) { return $path }
972 else { return Path::Class::File->new( $c->config->{home}, @path ) }
975 =head2 $c->plugin( $name, $class, @args )
977 Helper method for plugins. It creates a class data accessor/mutator and
978 loads and instantiates the given class.
980 MyApp->plugin( 'prototype', 'HTML::Prototype' );
982 $c->prototype->define_javascript_functions;
984 B<Note:> This method of adding plugins is deprecated. The ability
985 to add plugins like this B<will be removed> in a Catalyst 5.81.
986 Please do not use this functionality in new code.
991 my ( $class, $name, $plugin, @args ) = @_;
993 # See block comment in t/unit_core_plugin.t
994 $class->log->warn(qq/Adding plugin using the ->plugin method is deprecated, and will be removed in Catalyst 5.81/);
996 $class->_register_plugin( $plugin, 1 );
998 eval { $plugin->import };
999 $class->mk_classdata($name);
1001 eval { $obj = $plugin->new(@args) };
1004 Catalyst::Exception->throw( message =>
1005 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
1008 $class->$name($obj);
1009 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
1015 Initializes the dispatcher and engine, loads any plugins, and loads the
1016 model, view, and controller components. You may also specify an array
1017 of plugins to load here, if you choose to not load them in the C<use
1021 MyApp->setup( qw/-Debug/ );
1026 my ( $class, @arguments ) = @_;
1027 croak('Running setup more than once')
1028 if ( $class->setup_finished );
1030 unless ( $class->isa('Catalyst') ) {
1032 Catalyst::Exception->throw(
1033 message => qq/'$class' does not inherit from Catalyst/ );
1036 if ( $class->arguments ) {
1037 @arguments = ( @arguments, @{ $class->arguments } );
1043 foreach (@arguments) {
1047 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
1049 elsif (/^-(\w+)=?(.*)$/) {
1050 $flags->{ lc $1 } = $2;
1053 push @{ $flags->{plugins} }, $_;
1057 $class->setup_home( delete $flags->{home} );
1059 $class->setup_log( delete $flags->{log} );
1060 $class->setup_plugins( delete $flags->{plugins} );
1061 $class->setup_dispatcher( delete $flags->{dispatcher} );
1062 $class->setup_engine( delete $flags->{engine} );
1063 $class->setup_stats( delete $flags->{stats} );
1065 for my $flag ( sort keys %{$flags} ) {
1067 if ( my $code = $class->can( 'setup_' . $flag ) ) {
1068 &$code( $class, delete $flags->{$flag} );
1071 $class->log->warn(qq/Unknown flag "$flag"/);
1075 eval { require Catalyst::Devel; };
1076 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
1077 $class->log->warn(<<"EOF");
1078 You are running an old script!
1080 Please update by running (this will overwrite existing files):
1081 catalyst.pl -force -scripts $class
1083 or (this will not overwrite existing files):
1084 catalyst.pl -scripts $class
1089 if ( $class->debug ) {
1090 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
1093 my $column_width = Catalyst::Utils::term_width() - 6;
1094 my $t = Text::SimpleTable->new($column_width);
1095 $t->row($_) for @plugins;
1096 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
1099 my $dispatcher = $class->dispatcher;
1100 my $engine = $class->engine;
1101 my $home = $class->config->{home};
1103 $class->log->debug(sprintf(q/Loaded dispatcher "%s"/, blessed($dispatcher)));
1104 $class->log->debug(sprintf(q/Loaded engine "%s"/, blessed($engine)));
1108 ? $class->log->debug(qq/Found home "$home"/)
1109 : $class->log->debug(qq/Home "$home" doesn't exist/)
1110 : $class->log->debug(q/Couldn't find home/);
1113 # Call plugins setup, this is stupid and evil.
1114 # Also screws C3 badly on 5.10, hack to avoid.
1116 no warnings qw/redefine/;
1117 local *setup = sub { };
1118 $class->setup unless $Catalyst::__AM_RESTARTING;
1121 # Initialize our data structure
1122 $class->components( {} );
1124 $class->setup_components;
1126 if ( $class->debug ) {
1127 my $column_width = Catalyst::Utils::term_width() - 8 - 9;
1128 my $t = Text::SimpleTable->new( [ $column_width, 'Class' ], [ 8, 'Type' ] );
1129 for my $comp ( sort keys %{ $class->components } ) {
1130 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
1131 $t->row( $comp, $type );
1133 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
1134 if ( keys %{ $class->components } );
1137 # Add our self to components, since we are also a component
1138 if( $class->isa('Catalyst::Controller') ){
1139 $class->components->{$class} = $class;
1142 $class->setup_actions;
1144 if ( $class->debug ) {
1145 my $name = $class->config->{name} || 'Application';
1146 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
1148 $class->log->_flush() if $class->log->can('_flush');
1150 # Make sure that the application class becomes immutable at this point,
1151 B::Hooks::EndOfScope::on_scope_end {
1153 my $meta = Class::MOP::get_metaclass_by_name($class);
1156 && ! { $meta->immutable_options }->{replace_constructor}
1158 $class->isa('Class::Accessor::Fast')
1159 || $class->isa('Class::Accessor')
1162 warn "You made your application class ($class) immutable, "
1163 . "but did not inline the\nconstructor. "
1164 . "This will break catalyst, as your app \@ISA "
1165 . "Class::Accessor(::Fast)?\nPlease pass "
1166 . "(replace_constructor => 1)\nwhen making your class immutable.\n";
1168 $meta->make_immutable(
1169 replace_constructor => 1,
1170 ) unless $meta->is_immutable;
1173 $class->setup_finalize;
1177 =head2 $app->setup_finalize
1179 A hook to attach modifiers to.
1180 Using C<< after setup => sub{}; >> doesn't work, because of quirky things done for plugin setup.
1181 Also better than C< setup_finished(); >, as that is a getter method.
1183 sub setup_finalize {
1187 ## do stuff, i.e., determine a primary key column for sessions stored in a DB
1189 $app->next::method(@_);
1196 sub setup_finalize {
1198 $class->setup_finished(1);
1201 =head2 $c->uri_for( $path?, @args?, \%query_values? )
1203 =head2 $c->uri_for( $action, \@captures?, @args?, \%query_values? )
1205 Constructs an absolute L<URI> object based on the application root, the
1206 provided path, and the additional arguments and query parameters provided.
1207 When used as a string, provides a textual URI.
1209 If no arguments are provided, the URI for the current action is returned.
1210 To return the current action and also provide @args, use
1211 C<< $c->uri_for( $c->action, @args ) >>. Don't do
1212 C<< $c->uri_for( undef, @args ) >>.
1214 If the first argument is a string, it is taken as a public URI path relative
1215 to C<< $c->namespace >> (if it doesn't begin with a forward slash) or
1216 relative to the application root (if it does). It is then merged with
1217 C<< $c->request->base >>; any C<@args> are appended as additional path
1218 components; and any C<%query_values> are appended as C<?foo=bar> parameters.
1220 If the first argument is a L<Catalyst::Action> it represents an action which
1221 will have its path resolved using C<< $c->dispatcher->uri_for_action >>. The
1222 optional C<\@captures> argument (an arrayref) allows passing the captured
1223 variables that are needed to fill in the paths of Chained and Regex actions;
1224 once the path is resolved, C<uri_for> continues as though a path was
1225 provided, appending any arguments or parameters and creating an absolute
1228 The captures for the current request can be found in
1229 C<< $c->request->captures >>, and actions can be resolved using
1230 C<< Catalyst::Controller->action_for($name) >>. If you have a private action
1231 path, use C<< $c->uri_for_action >> instead.
1233 # Equivalent to $c->req->uri
1234 $c->uri_for($c->action, $c->req->captures,
1235 @{ $c->req->args }, $c->req->params);
1237 # For the Foo action in the Bar controller
1238 $c->uri_for($c->controller('Bar')->action_for('Foo'));
1240 # Path to a static resource
1241 $c->uri_for('/static/images/logo.png');
1246 my ( $c, $path, @args ) = @_;
1248 if (blessed($path) && $path->isa('Catalyst::Controller')) {
1249 $path = $path->path_prefix;
1254 if ( blessed($path) ) { # action object
1255 my $captures = ( scalar @args && ref $args[0] eq 'ARRAY'
1259 $path = $c->dispatcher->uri_for_action($action, $captures);
1260 if (not defined $path) {
1261 $c->log->debug(qq/Can't find uri_for action '$action' @$captures/)
1265 $path = '/' if $path eq '';
1268 undef($path) if (defined $path && $path eq '');
1271 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
1273 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
1274 s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
1276 unshift(@args, $path);
1278 unless (defined $path && $path =~ s!^/!!) { # in-place strip
1279 my $namespace = $c->namespace;
1280 if (defined $path) { # cheesy hack to handle path '../foo'
1281 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
1283 unshift(@args, $namespace || '');
1286 # join args with '/', or a blank string
1287 my $args = join('/', grep { defined($_) } @args);
1288 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
1290 my $base = $c->req->base;
1291 my $class = ref($base);
1292 $base =~ s{(?<!/)$}{/};
1296 if (my @keys = keys %$params) {
1297 # somewhat lifted from URI::_query's query_form
1298 $query = '?'.join('&', map {
1299 my $val = $params->{$_};
1300 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1303 $val = '' unless defined $val;
1306 utf8::encode( $param ) if utf8::is_utf8($param);
1307 # using the URI::Escape pattern here so utf8 chars survive
1308 $param =~ s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1310 "${key}=$param"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1314 my $res = bless(\"${base}${args}${query}", $class);
1318 =head2 $c->uri_for_action( $path, \@captures?, @args?, \%query_values? )
1320 =head2 $c->uri_for_action( $action, \@captures?, @args?, \%query_values? )
1326 A private path to the Catalyst action you want to create a URI for.
1328 This is a shortcut for calling C<< $c->dispatcher->get_action_by_path($path)
1329 >> and passing the resulting C<$action> and the remaining arguments to C<<
1332 You can also pass in a Catalyst::Action object, in which case it is passed to
1339 sub uri_for_action {
1340 my ( $c, $path, @args ) = @_;
1341 my $action = blessed($path)
1343 : $c->dispatcher->get_action_by_path($path);
1344 unless (defined $action) {
1345 croak "Can't find action for path '$path'";
1347 return $c->uri_for( $action, @args );
1350 =head2 $c->welcome_message
1352 Returns the Catalyst welcome HTML page.
1356 sub welcome_message {
1358 my $name = $c->config->{name};
1359 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1360 my $prefix = Catalyst::Utils::appprefix( ref $c );
1361 $c->response->content_type('text/html; charset=utf-8');
1363 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1364 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1365 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1367 <meta http-equiv="Content-Language" content="en" />
1368 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1369 <title>$name on Catalyst $VERSION</title>
1370 <style type="text/css">
1373 background-color: #eee;
1380 margin-bottom: 10px;
1382 background-color: #ccc;
1383 border: 1px solid #aaa;
1388 font-family: verdana, tahoma, sans-serif;
1391 font-family: verdana, tahoma, sans-serif;
1394 text-decoration: none;
1396 border-bottom: 1px dotted #bbb;
1398 :link:hover, :visited:hover {
1411 background-color: #fff;
1412 border: 1px solid #aaa;
1416 font-weight: normal;
1438 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1443 <img src="$logo" alt="Catalyst Logo" />
1445 <p>Welcome to the world of Catalyst.
1446 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1447 framework will make web development something you had
1448 never expected it to be: Fun, rewarding, and quick.</p>
1449 <h2>What to do now?</h2>
1450 <p>That really depends on what <b>you</b> want to do.
1451 We do, however, provide you with a few starting points.</p>
1452 <p>If you want to jump right into web development with Catalyst
1453 you might want to start with a tutorial.</p>
1454 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1456 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1458 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1459 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1461 <h2>What to do next?</h2>
1462 <p>Next it's time to write an actual application. Use the
1463 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1464 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1465 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1466 they can save you a lot of work.</p>
1467 <pre><code>script/${prefix}_create.pl -help</code></pre>
1468 <p>Also, be sure to check out the vast and growing
1469 collection of <a href="http://search.cpan.org/search?query=Catalyst">plugins for Catalyst on CPAN</a>;
1470 you are likely to find what you need there.
1474 <p>Catalyst has a very active community. Here are the main places to
1475 get in touch with us.</p>
1478 <a href="http://dev.catalyst.perl.org">Wiki</a>
1481 <a href="http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst">Mailing-List</a>
1484 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1487 <h2>In conclusion</h2>
1488 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1489 as we enjoyed making it. Please contact us if you have ideas
1490 for improvement or other feedback.</p>
1498 =head1 INTERNAL METHODS
1500 These methods are not meant to be used by end users.
1502 =head2 $c->components
1504 Returns a hash of components.
1506 =head2 $c->context_class
1508 Returns or sets the context class.
1512 Returns a hashref containing coderefs and execution counts (needed for
1513 deep recursion detection).
1517 Returns the number of actions on the current internal execution stack.
1521 Dispatches a request to actions.
1525 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1527 =head2 $c->dispatcher_class
1529 Returns or sets the dispatcher class.
1531 =head2 $c->dump_these
1533 Returns a list of 2-element array references (name, structure) pairs
1534 that will be dumped on the error page in debug mode.
1540 [ Request => $c->req ],
1541 [ Response => $c->res ],
1542 [ Stash => $c->stash ],
1543 [ Config => $c->config ];
1546 =head2 $c->engine_class
1548 Returns or sets the engine class.
1550 =head2 $c->execute( $class, $coderef )
1552 Execute a coderef in given class and catch exceptions. Errors are available
1558 my ( $c, $class, $code ) = @_;
1559 $class = $c->component($class) || $class;
1562 if ( $c->depth >= $RECURSION ) {
1563 my $action = $code->reverse();
1564 $action = "/$action" unless $action =~ /->/;
1565 my $error = qq/Deep recursion detected calling "${action}"/;
1566 $c->log->error($error);
1572 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1574 push( @{ $c->stack }, $code );
1576 no warnings 'recursion';
1577 eval { $c->state( $code->execute( $class, $c, @{ $c->req->args } ) || 0 ) };
1579 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1581 my $last = pop( @{ $c->stack } );
1583 if ( my $error = $@ ) {
1584 if ( blessed($error) and $error->isa('Catalyst::Exception::Detach') ) {
1585 $error->rethrow if $c->depth > 1;
1587 elsif ( blessed($error) and $error->isa('Catalyst::Exception::Go') ) {
1588 $error->rethrow if $c->depth > 0;
1591 unless ( ref $error ) {
1592 no warnings 'uninitialized';
1594 my $class = $last->class;
1595 my $name = $last->name;
1596 $error = qq/Caught exception in $class->$name "$error"/;
1605 sub _stats_start_execute {
1606 my ( $c, $code ) = @_;
1607 my $appclass = ref($c) || $c;
1608 return if ( ( $code->name =~ /^_.*/ )
1609 && ( !$appclass->config->{show_internal_actions} ) );
1611 my $action_name = $code->reverse();
1612 $c->counter->{$action_name}++;
1614 my $action = $action_name;
1615 $action = "/$action" unless $action =~ /->/;
1617 # determine if the call was the result of a forward
1618 # this is done by walking up the call stack and looking for a calling
1619 # sub of Catalyst::forward before the eval
1621 for my $index ( 2 .. 11 ) {
1623 if ( ( caller($index) )[0] eq 'Catalyst'
1624 && ( caller($index) )[3] eq '(eval)' );
1626 if ( ( caller($index) )[3] =~ /forward$/ ) {
1627 $callsub = ( caller($index) )[3];
1628 $action = "-> $action";
1633 my $uid = $action_name . $c->counter->{$action_name};
1635 # is this a root-level call or a forwarded call?
1636 if ( $callsub =~ /forward$/ ) {
1637 my $parent = $c->stack->[-1];
1639 # forward, locate the caller
1640 if ( exists $c->counter->{"$parent"} ) {
1643 parent => "$parent" . $c->counter->{"$parent"},
1649 # forward with no caller may come from a plugin
1668 sub _stats_finish_execute {
1669 my ( $c, $info ) = @_;
1670 $c->stats->profile( end => $info );
1675 Finalizes the request.
1682 for my $error ( @{ $c->error } ) {
1683 $c->log->error($error);
1686 # Allow engine to handle finalize flow (for POE)
1687 my $engine = $c->engine;
1688 if ( my $code = $engine->can('finalize') ) {
1693 $c->finalize_uploads;
1696 if ( $#{ $c->error } >= 0 ) {
1700 $c->finalize_headers;
1703 if ( $c->request->method eq 'HEAD' ) {
1704 $c->response->body('');
1710 if ($c->use_stats) {
1711 my $elapsed = sprintf '%f', $c->stats->elapsed;
1712 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1714 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1717 return $c->response->status;
1720 =head2 $c->finalize_body
1726 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1728 =head2 $c->finalize_cookies
1734 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1736 =head2 $c->finalize_error
1742 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1744 =head2 $c->finalize_headers
1750 sub finalize_headers {
1753 my $response = $c->response; #accessor calls can add up?
1755 # Check if we already finalized headers
1756 return if $response->finalized_headers;
1759 if ( my $location = $response->redirect ) {
1760 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1761 $response->header( Location => $location );
1763 if ( !$response->has_body ) {
1764 # Add a default body if none is already present
1766 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1772 if ( $response->body && !$response->content_length ) {
1774 # get the length from a filehandle
1775 if ( blessed( $response->body ) && $response->body->can('read') )
1777 my $stat = stat $response->body;
1778 if ( $stat && $stat->size > 0 ) {
1779 $response->content_length( $stat->size );
1782 $c->log->warn('Serving filehandle without a content-length');
1786 # everything should be bytes at this point, but just in case
1787 $response->content_length( bytes::length( $response->body ) );
1792 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1793 $response->headers->remove_header("Content-Length");
1794 $response->body('');
1797 $c->finalize_cookies;
1799 $c->engine->finalize_headers( $c, @_ );
1802 $response->finalized_headers(1);
1805 =head2 $c->finalize_output
1807 An alias for finalize_body.
1809 =head2 $c->finalize_read
1811 Finalizes the input after reading is complete.
1815 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1817 =head2 $c->finalize_uploads
1819 Finalizes uploads. Cleans up any temporary files.
1823 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1825 =head2 $c->get_action( $action, $namespace )
1827 Gets an action in a given namespace.
1831 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1833 =head2 $c->get_actions( $action, $namespace )
1835 Gets all actions of a given name in a namespace and all parent
1840 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1842 =head2 $c->handle_request( $class, @arguments )
1844 Called to handle each HTTP request.
1848 sub handle_request {
1849 my ( $class, @arguments ) = @_;
1851 # Always expect worst case!
1854 if ($class->debug) {
1855 my $secs = time - $START || 1;
1856 my $av = sprintf '%.3f', $COUNT / $secs;
1857 my $time = localtime time;
1858 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1861 my $c = $class->prepare(@arguments);
1863 $status = $c->finalize;
1866 if ( my $error = $@ ) {
1868 $class->log->error(qq/Caught exception in engine "$error"/);
1873 if(my $coderef = $class->log->can('_flush')){
1874 $class->log->$coderef();
1879 =head2 $c->prepare( @arguments )
1881 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1887 my ( $class, @arguments ) = @_;
1890 # After the app/ctxt split, this should become an attribute based on something passed
1891 # into the application.
1892 $class->context_class( ref $class || $class ) unless $class->context_class;
1894 my $c = $class->context_class->new({});
1896 # For on-demand data
1897 $c->request->_context($c);
1898 $c->response->_context($c);
1900 #surely this is not the most efficient way to do things...
1901 $c->stats($class->stats_class->new)->enable($c->use_stats);
1903 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1906 #XXX reuse coderef from can
1907 # Allow engine to direct the prepare flow (for POE)
1908 if ( $c->engine->can('prepare') ) {
1909 $c->engine->prepare( $c, @arguments );
1912 $c->prepare_request(@arguments);
1913 $c->prepare_connection;
1914 $c->prepare_query_parameters;
1915 $c->prepare_headers;
1916 $c->prepare_cookies;
1919 # Prepare the body for reading, either by prepare_body
1920 # or the user, if they are using $c->read
1923 # Parse the body unless the user wants it on-demand
1924 unless ( ref($c)->config->{parse_on_demand} ) {
1929 my $method = $c->req->method || '';
1930 my $path = $c->req->path;
1931 $path = '/' unless length $path;
1932 my $address = $c->req->address || '';
1934 $c->log->debug(qq/"$method" request for "$path" from "$address"/)
1942 =head2 $c->prepare_action
1944 Prepares action. See L<Catalyst::Dispatcher>.
1948 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1950 =head2 $c->prepare_body
1952 Prepares message body.
1959 return if $c->request->_has_body;
1961 # Initialize on-demand data
1962 $c->engine->prepare_body( $c, @_ );
1963 $c->prepare_parameters;
1964 $c->prepare_uploads;
1966 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1967 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1968 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1969 my $param = $c->req->body_parameters->{$key};
1970 my $value = defined($param) ? $param : '';
1972 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1974 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1978 =head2 $c->prepare_body_chunk( $chunk )
1980 Prepares a chunk of data before sending it to L<HTTP::Body>.
1982 See L<Catalyst::Engine>.
1986 sub prepare_body_chunk {
1988 $c->engine->prepare_body_chunk( $c, @_ );
1991 =head2 $c->prepare_body_parameters
1993 Prepares body parameters.
1997 sub prepare_body_parameters {
1999 $c->engine->prepare_body_parameters( $c, @_ );
2002 =head2 $c->prepare_connection
2004 Prepares connection.
2008 sub prepare_connection {
2010 $c->engine->prepare_connection( $c, @_ );
2013 =head2 $c->prepare_cookies
2019 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
2021 =head2 $c->prepare_headers
2027 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
2029 =head2 $c->prepare_parameters
2031 Prepares parameters.
2035 sub prepare_parameters {
2037 $c->prepare_body_parameters;
2038 $c->engine->prepare_parameters( $c, @_ );
2041 =head2 $c->prepare_path
2043 Prepares path and base.
2047 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
2049 =head2 $c->prepare_query_parameters
2051 Prepares query parameters.
2055 sub prepare_query_parameters {
2058 $c->engine->prepare_query_parameters( $c, @_ );
2060 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
2061 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
2062 for my $key ( sort keys %{ $c->req->query_parameters } ) {
2063 my $param = $c->req->query_parameters->{$key};
2064 my $value = defined($param) ? $param : '';
2066 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
2068 $c->log->debug( "Query Parameters are:\n" . $t->draw );
2072 =head2 $c->prepare_read
2074 Prepares the input for reading.
2078 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
2080 =head2 $c->prepare_request
2082 Prepares the engine request.
2086 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
2088 =head2 $c->prepare_uploads
2094 sub prepare_uploads {
2097 $c->engine->prepare_uploads( $c, @_ );
2099 if ( $c->debug && keys %{ $c->request->uploads } ) {
2100 my $t = Text::SimpleTable->new(
2101 [ 12, 'Parameter' ],
2106 for my $key ( sort keys %{ $c->request->uploads } ) {
2107 my $upload = $c->request->uploads->{$key};
2108 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
2109 $t->row( $key, $u->filename, $u->type, $u->size );
2112 $c->log->debug( "File Uploads are:\n" . $t->draw );
2116 =head2 $c->prepare_write
2118 Prepares the output for writing.
2122 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
2124 =head2 $c->request_class
2126 Returns or sets the request class.
2128 =head2 $c->response_class
2130 Returns or sets the response class.
2132 =head2 $c->read( [$maxlength] )
2134 Reads a chunk of data from the request body. This method is designed to
2135 be used in a while loop, reading C<$maxlength> bytes on every call.
2136 C<$maxlength> defaults to the size of the request if not specified.
2138 You have to set C<< MyApp->config(parse_on_demand => 1) >> to use this
2141 Warning: If you use read(), Catalyst will not process the body,
2142 so you will not be able to access POST parameters or file uploads via
2143 $c->request. You must handle all body parsing yourself.
2147 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
2155 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
2157 =head2 $c->set_action( $action, $code, $namespace, $attrs )
2159 Sets an action in a given namespace.
2163 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
2165 =head2 $c->setup_actions($component)
2167 Sets up actions for a component.
2171 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
2173 =head2 $c->setup_components
2175 This method is called internally to set up the application's components.
2177 It finds modules by calling the L<locate_components> method, expands them to
2178 package names with the L<expand_component_module> method, and then installs
2179 each component into the application.
2181 The C<setup_components> config option is passed to both of the above methods.
2183 Installation of each component is performed by the L<setup_component> method,
2188 sub setup_components {
2191 my $config = $class->config->{ setup_components };
2193 my @comps = sort { length $a <=> length $b }
2194 $class->locate_components($config);
2195 my %comps = map { $_ => 1 } @comps;
2197 my $deprecatedcatalyst_component_names = grep { /::[CMV]::/ } @comps;
2198 $class->log->warn(qq{Your application is using the deprecated ::[MVC]:: type naming scheme.\n}.
2199 qq{Please switch your class names to ::Model::, ::View:: and ::Controller: as appropriate.\n}
2200 ) if $deprecatedcatalyst_component_names;
2202 for my $component ( @comps ) {
2204 # We pass ignore_loaded here so that overlay files for (e.g.)
2205 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
2206 # we know M::P::O found a file on disk so this is safe
2208 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
2210 # Needs to be done as soon as the component is loaded, as loading a sub-component
2211 # (next time round the loop) can cause us to get the wrong metaclass..
2212 $class->_controller_init_base_classes($component);
2215 for my $component (@comps) {
2216 $class->components->{ $component } = $class->setup_component($component);
2217 for my $component ($class->expand_component_module( $component, $config )) {
2218 next if $comps{$component};
2219 $class->_controller_init_base_classes($component); # Also cover inner packages
2220 $class->components->{ $component } = $class->setup_component($component);
2225 =head2 $c->locate_components( $setup_component_config )
2227 This method is meant to provide a list of component modules that should be
2228 setup for the application. By default, it will use L<Module::Pluggable>.
2230 Specify a C<setup_components> config option to pass additional options directly
2231 to L<Module::Pluggable>. To add additional search paths, specify a key named
2232 C<search_extra> as an array reference. Items in the array beginning with C<::>
2233 will have the application class name prepended to them.
2237 sub locate_components {
2241 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
2242 my $extra = delete $config->{ search_extra } || [];
2244 push @paths, @$extra;
2246 my $locator = Module::Pluggable::Object->new(
2247 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
2251 my @comps = $locator->plugins;
2256 =head2 $c->expand_component_module( $component, $setup_component_config )
2258 Components found by C<locate_components> will be passed to this method, which
2259 is expected to return a list of component (package) names to be set up.
2263 sub expand_component_module {
2264 my ($class, $module) = @_;
2265 return Devel::InnerPackage::list_packages( $module );
2268 =head2 $c->setup_component
2272 # FIXME - Ugly, ugly hack to ensure the we force initialize non-moose base classes
2273 # nearest to Catalyst::Controller first, no matter what order stuff happens
2274 # to be loaded. There are TODO tests in Moose for this, see
2275 # f2391d17574eff81d911b97be15ea51080500003
2276 sub _controller_init_base_classes {
2277 my ($app_class, $component) = @_;
2278 return unless $component->isa('Catalyst::Controller');
2279 foreach my $class ( reverse @{ mro::get_linear_isa($component) } ) {
2280 Moose::Meta::Class->initialize( $class )
2281 unless find_meta($class);
2285 sub setup_component {
2286 my( $class, $component ) = @_;
2288 unless ( $component->can( 'COMPONENT' ) ) {
2292 my $suffix = Catalyst::Utils::class2classsuffix( $component );
2293 my $config = $class->config->{ $suffix } || {};
2294 # Stash catalyst_component_name in the config here, so that custom COMPONENT
2295 # methods also pass it. local to avoid pointlessly shitting in config
2296 # for the debug screen, as $component is already the key name.
2297 local $config->{catalyst_component_name} = $component;
2299 my $instance = eval { $component->COMPONENT( $class, $config ); };
2301 if ( my $error = $@ ) {
2303 Catalyst::Exception->throw(
2304 message => qq/Couldn't instantiate component "$component", "$error"/
2308 unless (blessed $instance) {
2309 my $metaclass = Moose::Util::find_meta($component);
2310 my $method_meta = $metaclass->find_method_by_name('COMPONENT');
2311 my $component_method_from = $method_meta->associated_metaclass->name;
2312 my $value = defined($instance) ? $instance : 'undef';
2313 Catalyst::Exception->throw(
2315 qq/Couldn't instantiate component "$component", COMPONENT() method (from $component_method_from) didn't return an object-like value (value was $value)./
2321 =head2 $c->setup_dispatcher
2327 sub setup_dispatcher {
2328 my ( $class, $dispatcher ) = @_;
2331 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
2334 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
2335 $dispatcher = 'Catalyst::Dispatcher::' . $env;
2338 unless ($dispatcher) {
2339 $dispatcher = $class->dispatcher_class;
2342 Class::MOP::load_class($dispatcher);
2344 # dispatcher instance
2345 $class->dispatcher( $dispatcher->new );
2348 =head2 $c->setup_engine
2355 my ( $class, $engine ) = @_;
2358 $engine = 'Catalyst::Engine::' . $engine;
2361 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
2362 $engine = 'Catalyst::Engine::' . $env;
2365 if ( $ENV{MOD_PERL} ) {
2366 my $meta = Class::MOP::get_metaclass_by_name($class);
2368 # create the apache method
2369 $meta->add_method('apache' => sub { shift->engine->apache });
2371 my ( $software, $version ) =
2372 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2375 $version =~ s/(\.[^.]+)\./$1/g;
2377 if ( $software eq 'mod_perl' ) {
2381 if ( $version >= 1.99922 ) {
2382 $engine = 'Catalyst::Engine::Apache2::MP20';
2385 elsif ( $version >= 1.9901 ) {
2386 $engine = 'Catalyst::Engine::Apache2::MP19';
2389 elsif ( $version >= 1.24 ) {
2390 $engine = 'Catalyst::Engine::Apache::MP13';
2394 Catalyst::Exception->throw( message =>
2395 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2400 # install the correct mod_perl handler
2401 if ( $version >= 1.9901 ) {
2402 *handler = sub : method {
2403 shift->handle_request(@_);
2407 *handler = sub ($$) { shift->handle_request(@_) };
2412 elsif ( $software eq 'Zeus-Perl' ) {
2413 $engine = 'Catalyst::Engine::Zeus';
2417 Catalyst::Exception->throw(
2418 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2423 $engine = $class->engine_class;
2426 Class::MOP::load_class($engine);
2428 # check for old engines that are no longer compatible
2430 if ( $engine->isa('Catalyst::Engine::Apache')
2431 && !Catalyst::Engine::Apache->VERSION )
2436 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2437 && Catalyst::Engine::Server->VERSION le '0.02' )
2442 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2443 && $engine->VERSION eq '0.01' )
2448 elsif ($engine->isa('Catalyst::Engine::Zeus')
2449 && $engine->VERSION eq '0.01' )
2455 Catalyst::Exception->throw( message =>
2456 qq/Engine "$engine" is not supported by this version of Catalyst/
2461 $class->engine( $engine->new );
2464 =head2 $c->setup_home
2466 Sets up the home directory.
2471 my ( $class, $home ) = @_;
2473 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2477 $home ||= Catalyst::Utils::home($class);
2480 #I remember recently being scolded for assigning config values like this
2481 $class->config->{home} ||= $home;
2482 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2486 =head2 $c->setup_log
2488 Sets up log by instantiating a L<Catalyst::Log|Catalyst::Log> object and
2489 passing it to C<log()>. Pass in a comma-delimited list of levels to set the
2492 This method also installs a C<debug> method that returns a true value into the
2493 catalyst subclass if the "debug" level is passed in the comma-delimited list,
2494 or if the C<$CATALYST_DEBUG> environment variable is set to a true value.
2496 Note that if the log has already been setup, by either a previous call to
2497 C<setup_log> or by a call such as C<< __PACKAGE__->log( MyLogger->new ) >>,
2498 that this method won't actually set up the log object.
2503 my ( $class, $levels ) = @_;
2506 $levels =~ s/^\s+//;
2507 $levels =~ s/\s+$//;
2508 my %levels = map { $_ => 1 } split /\s*,\s*/, $levels;
2510 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2511 if ( defined $env_debug ) {
2512 $levels{debug} = 1 if $env_debug; # Ugly!
2513 delete($levels{debug}) unless $env_debug;
2516 unless ( $class->log ) {
2517 $class->log( Catalyst::Log->new(keys %levels) );
2520 if ( $levels{debug} ) {
2521 Class::MOP::get_metaclass_by_name($class)->add_method('debug' => sub { 1 });
2522 $class->log->debug('Debug messages enabled');
2526 =head2 $c->setup_plugins
2532 =head2 $c->setup_stats
2534 Sets up timing statistics class.
2539 my ( $class, $stats ) = @_;
2541 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2543 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2544 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2545 Class::MOP::get_metaclass_by_name($class)->add_method('use_stats' => sub { 1 });
2546 $class->log->debug('Statistics enabled');
2551 =head2 $c->registered_plugins
2553 Returns a sorted list of the plugins which have either been stated in the
2554 import list or which have been added via C<< MyApp->plugin(@args); >>.
2556 If passed a given plugin name, it will report a boolean value indicating
2557 whether or not that plugin is loaded. A fully qualified name is required if
2558 the plugin name does not begin with C<Catalyst::Plugin::>.
2560 if ($c->registered_plugins('Some::Plugin')) {
2568 sub registered_plugins {
2570 return sort keys %{ $proto->_plugins } unless @_;
2572 return 1 if exists $proto->_plugins->{$plugin};
2573 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2576 sub _register_plugin {
2577 my ( $proto, $plugin, $instant ) = @_;
2578 my $class = ref $proto || $proto;
2580 Class::MOP::load_class( $plugin );
2582 $proto->_plugins->{$plugin} = 1;
2585 if ( my $meta = Class::MOP::get_metaclass_by_name($class) ) {
2586 my @superclasses = ($plugin, $meta->superclasses );
2587 $meta->superclasses(@superclasses);
2589 unshift @{"$class\::ISA"}, $plugin;
2596 my ( $class, $plugins ) = @_;
2598 $class->_plugins( {} ) unless $class->_plugins;
2601 my @plugins = Catalyst::Utils::resolve_namespace($class . '::Plugin', 'Catalyst::Plugin', @$plugins);
2603 for my $plugin ( reverse @plugins ) {
2604 Class::MOP::load_class($plugin);
2605 my $meta = find_meta($plugin);
2606 next if $meta && $meta->isa('Moose::Meta::Role');
2608 $class->_register_plugin($plugin);
2613 grep { $_ && blessed($_) && $_->isa('Moose::Meta::Role') }
2614 map { find_meta($_) }
2617 Moose::Util::apply_all_roles(
2625 Returns an arrayref of the internal execution stack (actions that are
2626 currently executing).
2628 =head2 $c->stats_class
2630 Returns or sets the stats (timing statistics) class.
2632 =head2 $c->use_stats
2634 Returns 1 when stats collection is enabled. Stats collection is enabled
2635 when the -Stats options is set, debug is on or when the <MYAPP>_STATS
2636 environment variable is set.
2638 Note that this is a static method, not an accessor and should be overridden
2639 by declaring C<sub use_stats { 1 }> in your MyApp.pm, not by calling C<< $c->use_stats(1) >>.
2646 =head2 $c->write( $data )
2648 Writes $data to the output stream. When using this method directly, you
2649 will need to manually set the C<Content-Length> header to the length of
2650 your output data, if known.
2657 # Finalize headers if someone manually writes output
2658 $c->finalize_headers;
2660 return $c->engine->write( $c, @_ );
2665 Returns the Catalyst version number. Mostly useful for "powered by"
2666 messages in template systems.
2670 sub version { return $Catalyst::VERSION }
2672 =head1 CONFIGURATION
2674 There are a number of 'base' config variables which can be set:
2680 C<case_sensitive> - Makes private paths case sensitive. See L</CASE SENSITIVITY>.
2684 C<default_model> - The default model picked if you say C<< $c->model >>. See L</$c->model($name)>.
2688 C<default_view> - The default view to be rendered or returned when C<< $c->view >>. See L</$c->view($name)>.
2693 C<disable_component_resolution_regex_fallback> - Turns
2694 off the deprecated component resolution functionality so
2695 that if any of the component methods (e.g. C<< $c->controller('Foo') >>)
2696 are called then regex search will not be attempted on string values and
2697 instead C<undef> will be returned.
2701 C<home> - The application home directory. In an uninstalled application,
2702 this is the top level application directory. In an installed application,
2703 this will be the directory containing C<< MyApp.pm >>.
2707 C<ignore_frontend_proxy> - See L</PROXY SUPPORT>
2711 C<name> - The name of the application in debug messages and the debug and
2716 C<parse_on_demand> - The request body (for example file uploads) will not be parsed
2717 until it is accessed. This allows you to (for example) check authentication (and reject
2718 the upload) before actually recieving all the data. See L</ON-DEMAND PARSER>
2722 C<root> - The root directory for templates. Usually this is just a
2723 subdirectory of the home directory, but you can set it to change the
2724 templates to a different directory.
2728 C<search_extra> - Array reference passed to Module::Pluggable to for additional
2729 namespaces from which components will be loaded (and constructed and stored in
2730 C<< $c->components >>).
2734 C<show_internal_actions> - If true, causes internal actions such as C<< _DISPATCH >>
2735 to be shown in hit debug tables in the test server.
2739 C<using_frontend_proxy> - See L</PROXY SUPPORT>.
2743 =head1 INTERNAL ACTIONS
2745 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2746 C<_ACTION>, and C<_END>. These are by default not shown in the private
2747 action table, but you can make them visible with a config parameter.
2749 MyApp->config(show_internal_actions => 1);
2751 =head1 CASE SENSITIVITY
2753 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> is
2754 mapped to C</foo/bar>. You can activate case sensitivity with a config
2757 MyApp->config(case_sensitive => 1);
2759 This causes C<MyApp::C::Foo::Bar> to map to C</Foo/Bar>.
2761 =head1 ON-DEMAND PARSER
2763 The request body is usually parsed at the beginning of a request,
2764 but if you want to handle input yourself, you can enable on-demand
2765 parsing with a config parameter.
2767 MyApp->config(parse_on_demand => 1);
2769 =head1 PROXY SUPPORT
2771 Many production servers operate using the common double-server approach,
2772 with a lightweight frontend web server passing requests to a larger
2773 backend server. An application running on the backend server must deal
2774 with two problems: the remote user always appears to be C<127.0.0.1> and
2775 the server's hostname will appear to be C<localhost> regardless of the
2776 virtual host that the user connected through.
2778 Catalyst will automatically detect this situation when you are running
2779 the frontend and backend servers on the same machine. The following
2780 changes are made to the request.
2782 $c->req->address is set to the user's real IP address, as read from
2783 the HTTP X-Forwarded-For header.
2785 The host value for $c->req->base and $c->req->uri is set to the real
2786 host, as read from the HTTP X-Forwarded-Host header.
2788 Additionally, you may be running your backend application on an insecure
2789 connection (port 80) while your frontend proxy is running under SSL. If there
2790 is a discrepancy in the ports, use the HTTP header C<X-Forwarded-Port> to
2791 tell Catalyst what port the frontend listens on. This will allow all URIs to
2792 be created properly.
2794 In the case of passing in:
2796 X-Forwarded-Port: 443
2798 All calls to C<uri_for> will result in an https link, as is expected.
2800 Obviously, your web server must support these headers for this to work.
2802 In a more complex server farm environment where you may have your
2803 frontend proxy server(s) on different machines, you will need to set a
2804 configuration option to tell Catalyst to read the proxied data from the
2807 MyApp->config(using_frontend_proxy => 1);
2809 If you do not wish to use the proxy support at all, you may set:
2811 MyApp->config(ignore_frontend_proxy => 1);
2813 =head1 THREAD SAFETY
2815 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2816 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2817 believe the Catalyst core to be thread-safe.
2819 If you plan to operate in a threaded environment, remember that all other
2820 modules you are using must also be thread-safe. Some modules, most notably
2821 L<DBD::SQLite>, are not thread-safe.
2827 Join #catalyst on irc.perl.org.
2831 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst
2832 http://lists.scsys.co.uk/cgi-bin/mailman/listinfo/catalyst-dev
2836 http://catalyst.perl.org
2840 http://dev.catalyst.perl.org
2844 =head2 L<Task::Catalyst> - All you need to start with Catalyst
2846 =head2 L<Catalyst::Manual> - The Catalyst Manual
2848 =head2 L<Catalyst::Component>, L<Catalyst::Controller> - Base classes for components
2850 =head2 L<Catalyst::Engine> - Core engine
2852 =head2 L<Catalyst::Log> - Log class.
2854 =head2 L<Catalyst::Request> - Request object
2856 =head2 L<Catalyst::Response> - Response object
2858 =head2 L<Catalyst::Test> - The test suite.
2860 =head1 PROJECT FOUNDER
2862 sri: Sebastian Riedel <sri@cpan.org>
2868 acme: Leon Brocard <leon@astray.com>
2870 abraxxa: Alexander Hartmaier <abraxxa@cpan.org>
2874 Andrew Ford E<lt>A.Ford@ford-mason.co.ukE<gt>
2878 andyg: Andy Grundman <andy@hybridized.org>
2880 audreyt: Audrey Tang
2882 bricas: Brian Cassidy <bricas@cpan.org>
2884 Caelum: Rafael Kitover <rkitover@io.com>
2886 chansen: Christian Hansen
2888 chicks: Christopher Hicks
2890 Chisel Wright C<pause@herlpacker.co.uk>
2892 Danijel Milicevic C<me@danijel.de>
2894 David Kamholz E<lt>dkamholz@cpan.orgE<gt>
2896 David Naughton, C<naughton@umn.edu>
2900 dkubb: Dan Kubb <dan.kubb-cpan@onautopilot.com>
2904 dwc: Daniel Westermann-Clark <danieltwc@cpan.org>
2906 esskar: Sascha Kiefer
2908 fireartist: Carl Franks <cfranks@cpan.org>
2910 frew: Arthur Axel "fREW" Schmidt <frioux@gmail.com>
2912 gabb: Danijel Milicevic
2916 Gavin Henry C<ghenry@perl.me.uk>
2920 groditi: Guillermo Roditi <groditi@gmail.com>
2922 hobbs: Andrew Rodland <andrew@cleverdomain.org>
2924 ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
2926 jcamacho: Juan Camacho
2928 jester: Jesse Sheidlower C<jester@panix.com>
2930 jhannah: Jay Hannah <jay@jays.net>
2936 jon: Jon Schutz <jjschutz@cpan.org>
2938 Jonathan Rockway C<< <jrockway@cpan.org> >>
2940 Kieren Diment C<kd@totaldatasolution.com>
2942 konobi: Scott McWhirter <konobi@cpan.org>
2944 marcus: Marcus Ramberg <mramberg@cpan.org>
2946 miyagawa: Tatsuhiko Miyagawa <miyagawa@bulknews.net>
2948 mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
2952 naughton: David Naughton
2954 ningu: David Kamholz <dkamholz@cpan.org>
2956 nothingmuch: Yuval Kogman <nothingmuch@woobling.org>
2958 numa: Dan Sully <daniel@cpan.org>
2962 omega: Andreas Marienborg
2964 Oleg Kostyuk <cub.uanic@gmail.com>
2966 phaylon: Robert Sedlacek <phaylon@dunkelheit.at>
2968 rafl: Florian Ragwitz <rafl@debian.org>
2970 random: Roland Lammel <lammel@cpan.org>
2972 Robert Sedlacek C<< <rs@474.at> >>
2976 t0m: Tomas Doran <bobtfish@bobtfish.net>
2980 Viljo Marrandi C<vilts@yahoo.com>
2982 Will Hawes C<info@whawes.co.uk>
2984 willert: Sebastian Willert <willert@cpan.org>
2986 Yuval Kogman, C<nothingmuch@woobling.org>
2990 This library is free software. You can redistribute it and/or modify it under
2991 the same terms as Perl itself.
2997 __PACKAGE__->meta->make_immutable;