4 extends 'Catalyst::Component';
6 use Catalyst::Exception;
9 use Catalyst::Request::Upload;
10 use Catalyst::Response;
12 use Catalyst::Controller;
13 use Devel::InnerPackage ();
15 use Module::Pluggable::Object ();
17 use Text::SimpleTable ();
18 use Path::Class::Dir ();
19 use Path::Class::File ();
20 use Time::HiRes qw/gettimeofday tv_interval/;
24 use Scalar::Util qw/weaken blessed/;
25 use Tree::Simple qw/use_weak_refs/;
26 use Tree::Simple::Visitor::FindByUID;
29 use Carp qw/croak carp/;
31 BEGIN { require 5.008001; }
33 __PACKAGE__->mk_accessors(
34 qw/counter request response state action stack namespace stats stash/
37 attributes->import( __PACKAGE__, \&namespace, 'lvalue' );
39 sub depth { scalar @{ shift->stack || [] }; }
46 # For backwards compatibility
47 *finalize_output = \&finalize_body;
52 our $RECURSION = 1000;
53 our $DETACH = "catalyst_detach\n";
55 __PACKAGE__->mk_classdata($_)
56 for qw/components arguments dispatcher engine log dispatcher_class
57 engine_class context_class request_class response_class stats_class
60 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
61 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
62 __PACKAGE__->request_class('Catalyst::Request');
63 __PACKAGE__->response_class('Catalyst::Response');
64 __PACKAGE__->stats_class('Catalyst::Stats');
66 # Remember to update this in Catalyst::Runtime as well!
68 our $VERSION = '5.7013';
71 my ( $class, @arguments ) = @_;
73 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
75 return unless $class eq 'Catalyst';
77 my $caller = caller(0);
79 unless ( $caller->isa('Catalyst') ) {
81 push @{"$caller\::ISA"}, $class, 'Catalyst::Controller';
84 $caller->arguments( [@arguments] );
90 Catalyst - The Elegant MVC Web Application Framework
94 See the L<Catalyst::Manual> distribution for comprehensive
95 documentation and tutorials.
97 # Install Catalyst::Devel for helpers and other development tools
98 # use the helper to create a new application
101 # add models, views, controllers
102 script/myapp_create.pl model MyDatabase DBIC::Schema create=dynamic dbi:SQLite:/path/to/db
103 script/myapp_create.pl view MyTemplate TT
104 script/myapp_create.pl controller Search
106 # built in testserver -- use -r to restart automatically on changes
107 # --help to see all available options
108 script/myapp_server.pl
110 # command line testing interface
111 script/myapp_test.pl /yada
114 use Catalyst qw/-Debug/; # include plugins here as well
116 ### In lib/MyApp/Controller/Root.pm (autocreated)
117 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
118 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
119 $c->stash->{template} = 'foo.tt'; # set the template
120 # lookup something from db -- stash vars are passed to TT
122 $c->model('Database::Foo')->search( { country => $args[0] } );
123 if ( $c->req->params->{bar} ) { # access GET or POST parameters
124 $c->forward( 'bar' ); # process another action
125 # do something else after forward returns
129 # The foo.tt TT template can use the stash data from the database
130 [% WHILE (item = data.next) %]
134 # called for /bar/of/soap, /bar/of/soap/10, etc.
135 sub bar : Path('/bar/of/soap') { ... }
137 # called for all actions, from the top-most controller downwards
139 my ( $self, $c ) = @_;
140 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
141 $c->res->redirect( '/login' ); # require login
142 return 0; # abort request and go immediately to end()
144 return 1; # success; carry on to next action
147 # called after all actions are finished
149 my ( $self, $c ) = @_;
150 if ( scalar @{ $c->error } ) { ... } # handle errors
151 return if $c->res->body; # already have a response
152 $c->forward( 'MyApp::View::TT' ); # render template
155 ### in MyApp/Controller/Foo.pm
156 # called for /foo/bar
157 sub bar : Local { ... }
159 # called for /blargle
160 sub blargle : Global { ... }
162 # an index action matches /foo, but not /foo/1, etc.
163 sub index : Private { ... }
165 ### in MyApp/Controller/Foo/Bar.pm
166 # called for /foo/bar/baz
167 sub baz : Local { ... }
169 # first Root auto is called, then Foo auto, then this
170 sub auto : Private { ... }
172 # powerful regular expression paths are also possible
173 sub details : Regex('^product/(\w+)/details$') {
174 my ( $self, $c ) = @_;
175 # extract the (\w+) from the URI
176 my $product = $c->req->captures->[0];
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> and C<-Engine> 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
224 Forces Catalyst to use a specific engine. Omit the
225 C<Catalyst::Engine::> prefix of the engine name, i.e.:
227 use Catalyst qw/-Engine=CGI/;
231 Forces Catalyst to use a specific home directory, e.g.:
233 use Catalyst qw[-Home=/usr/mst];
235 This can also be done in the shell environment by setting either the
236 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
237 is replaced with the uppercased name of your application, any "::" in
238 the name will be replaced with underscores, e.g. MyApp::Web should use
239 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
247 Enables statistics collection and reporting. You can also force this setting
248 from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
249 environment settings override the application, with <MYAPP>_STATS having the
254 use Catalyst qw/-Stats=1/
258 =head2 INFORMATION ABOUT THE CURRENT REQUEST
262 Returns a L<Catalyst::Action> object for the current action, which
263 stringifies to the action name. See L<Catalyst::Action>.
267 Returns the namespace of the current action, i.e., the URI prefix
268 corresponding to the controller of the current action. For example:
270 # in Controller::Foo::Bar
271 $c->namespace; # returns 'foo/bar';
277 Returns the current L<Catalyst::Request> object, giving access to
278 information about the current client request (including parameters,
279 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
281 =head2 REQUEST FLOW HANDLING
283 =head2 $c->forward( $action [, \@arguments ] )
285 =head2 $c->forward( $class, $method, [, \@arguments ] )
287 Forwards processing to another action, by its private name. If you give a
288 class name but no method, C<process()> is called. You may also optionally
289 pass arguments in an arrayref. The action will receive the arguments in
290 C<@_> and C<< $c->req->args >>. Upon returning from the function,
291 C<< $c->req->args >> will be restored to the previous values.
293 Any data C<return>ed from the action forwarded to, will be returned by the
296 my $foodata = $c->forward('/foo');
297 $c->forward('index');
298 $c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/);
299 $c->forward('MyApp::View::TT');
301 Note that forward implies an C<<eval { }>> around the call (actually
302 C<execute> does), thus de-fatalizing all 'dies' within the called
303 action. If you want C<die> to propagate you need to do something like:
306 die $c->error if $c->error;
308 Or make sure to always return true values from your actions and write
311 $c->forward('foo') || return;
315 sub forward { my $c = shift; $c->dispatcher->forward( $c, @_ ) }
317 =head2 $c->detach( $action [, \@arguments ] )
319 =head2 $c->detach( $class, $method, [, \@arguments ] )
323 The same as C<forward>, but doesn't return to the previous action when
324 processing is finished.
326 When called with no arguments it escapes the processing chain entirely.
330 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
336 Returns the current L<Catalyst::Response> object, see there for details.
340 Returns a hashref to the stash, which may be used to store data and pass
341 it between components during a request. You can also set hash keys by
342 passing arguments. The stash is automatically sent to the view. The
343 stash is cleared at the end of a request; it cannot be used for
344 persistent storage (for this you must use a session; see
345 L<Catalyst::Plugin::Session> for a complete system integrated with
348 $c->stash->{foo} = $bar;
349 $c->stash( { moose => 'majestic', qux => 0 } );
350 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
352 # stash is automatically passed to the view for use in a template
353 $c->forward( 'MyApp::View::TT' );
357 around stash => sub {
361 my $stash = @_ > 1 ? {@_} : $_[0];
362 croak('stash takes a hash or hashref') unless ref $stash;
363 foreach my $key ( keys %$stash ) {
364 $c->$orig()->{$key} = $stash->{$key};
372 =head2 $c->error($error, ...)
374 =head2 $c->error($arrayref)
376 Returns an arrayref containing error messages. If Catalyst encounters an
377 error while processing a request, it stores the error in $c->error. This
378 method should only be used to store fatal error messages.
380 my @error = @{ $c->error };
384 $c->error('Something bad happened');
391 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
392 croak @$error unless ref $c;
393 push @{ $c->{error} }, @$error;
395 elsif ( defined $_[0] ) { $c->{error} = undef }
396 return $c->{error} || [];
402 Contains the return value of the last executed action.
404 =head2 $c->clear_errors
406 Clear errors. You probably don't want to clear the errors unless you are
407 implementing a custom error screen.
409 This is equivalent to running
423 my ( $c, @names ) = @_;
425 foreach my $name (@names) {
426 foreach my $component ( keys %{ $c->components } ) {
427 return $c->components->{$component} if $component =~ /$name/i;
434 # try explicit component names
436 my ( $c, @names ) = @_;
438 foreach my $try (@names) {
439 return $c->components->{$try} if ( exists $c->components->{$try} );
445 # like component, but try just these prefixes before regex searching,
446 # and do not try to return "sort keys %{ $c->components }"
448 my ( $c, $name, @prefixes ) = @_;
450 my $appclass = ref $c || $c;
452 my @names = map { "${appclass}::${_}::${name}" } @prefixes;
454 my $comp = $c->_comp_explicit(@names);
455 return $comp if defined($comp);
456 $comp = $c->_comp_search($name);
460 # Find possible names for a prefix
463 my ( $c, @prefixes ) = @_;
465 my $appclass = ref $c || $c;
467 my @pre = map { "${appclass}::${_}::" } @prefixes;
471 COMPONENT: foreach my $comp ($c->component) {
472 foreach my $p (@pre) {
473 if ($comp =~ s/^$p//) {
483 # Return a component if only one matches.
485 my ( $c, @prefixes ) = @_;
487 my $appclass = ref $c || $c;
489 my ( $comp, $rest ) =
490 map { $c->_comp_search("^${appclass}::${_}::") } @prefixes;
491 return $comp unless $rest;
494 # Filter a component before returning by calling ACCEPT_CONTEXT if available
495 sub _filter_component {
496 my ( $c, $comp, @args ) = @_;
497 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
498 return $comp->ACCEPT_CONTEXT( $c, @args );
500 else { return $comp }
503 =head2 COMPONENT ACCESSORS
505 =head2 $c->controller($name)
507 Gets a L<Catalyst::Controller> instance by name.
509 $c->controller('Foo')->do_stuff;
511 If the name is omitted, will return the controller for the dispatched
517 my ( $c, $name, @args ) = @_;
518 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Controller C/ ),
521 return $c->component( $c->action->class );
524 =head2 $c->model($name)
526 Gets a L<Catalyst::Model> instance by name.
528 $c->model('Foo')->do_stuff;
530 Any extra arguments are directly passed to ACCEPT_CONTEXT.
532 If the name is omitted, it will look for
533 - a model object in $c->stash{current_model_instance}, then
534 - a model name in $c->stash->{current_model}, then
535 - a config setting 'default_model', or
536 - check if there is only one model, and return it if that's the case.
541 my ( $c, $name, @args ) = @_;
542 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Model M/ ),
546 return $c->stash->{current_model_instance}
547 if $c->stash->{current_model_instance};
548 return $c->model( $c->stash->{current_model} )
549 if $c->stash->{current_model};
551 return $c->model( $c->config->{default_model} )
552 if $c->config->{default_model};
553 return $c->_filter_component( $c->_comp_singular(qw/Model M/) );
557 =head2 $c->controllers
559 Returns the available names which can be passed to $c->controller
565 return $c->_comp_names(qw/Controller C/);
569 =head2 $c->view($name)
571 Gets a L<Catalyst::View> instance by name.
573 $c->view('Foo')->do_stuff;
575 Any extra arguments are directly passed to ACCEPT_CONTEXT.
577 If the name is omitted, it will look for
578 - a view object in $c->stash{current_view_instance}, then
579 - a view name in $c->stash->{current_view}, then
580 - a config setting 'default_view', or
581 - check if there is only one view, and return it if that's the case.
586 my ( $c, $name, @args ) = @_;
587 return $c->_filter_component( $c->_comp_prefixes( $name, qw/View V/ ),
591 return $c->stash->{current_view_instance}
592 if $c->stash->{current_view_instance};
593 return $c->view( $c->stash->{current_view} )
594 if $c->stash->{current_view};
596 return $c->view( $c->config->{default_view} )
597 if $c->config->{default_view};
598 return $c->_filter_component( $c->_comp_singular(qw/View V/) );
603 Returns the available names which can be passed to $c->model
609 return $c->_comp_names(qw/Model M/);
615 Returns the available names which can be passed to $c->view
621 return $c->_comp_names(qw/View V/);
624 =head2 $c->comp($name)
626 =head2 $c->component($name)
628 Gets a component object by name. This method is not recommended,
629 unless you want to get a specific component by full
630 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
631 should be used instead.
642 my $appclass = ref $c || $c;
645 $name, "${appclass}::${name}",
646 map { "${appclass}::${_}::${name}" }
647 qw/Model M Controller C View V/
650 my $comp = $c->_comp_explicit(@names);
651 return $c->_filter_component( $comp, @_ ) if defined($comp);
653 $comp = $c->_comp_search($name);
654 return $c->_filter_component( $comp, @_ ) if defined($comp);
657 return sort keys %{ $c->components };
662 =head2 CLASS DATA AND HELPER CLASSES
666 Returns or takes a hashref containing the application's configuration.
668 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
670 You can also use a C<YAML>, C<XML> or C<Config::General> config file
671 like myapp.yml in your applications home directory. See
672 L<Catalyst::Plugin::ConfigLoader>.
675 db: dsn:SQLite:foo.db
683 $c->log->warn("Setting config after setup has been run is not a good idea.")
684 if ( @_ and $c->setup_finished );
686 $c->NEXT::config(@_);
691 Returns the logging object instance. Unless it is already set, Catalyst
692 sets this up with a L<Catalyst::Log> object. To use your own log class,
693 set the logger with the C<< __PACKAGE__->log >> method prior to calling
694 C<< __PACKAGE__->setup >>.
696 __PACKAGE__->log( MyLogger->new );
701 $c->log->info( 'Now logging with my own logger!' );
703 Your log class should implement the methods described in
709 Overload to enable debug messages (same as -Debug option).
711 Note that this is a static method, not an accessor and should be overloaded
712 by declaring "sub debug { 1 }" in your MyApp.pm, not by calling $c->debug(1).
718 =head2 $c->dispatcher
720 Returns the dispatcher instance. Stringifies to class name. See
721 L<Catalyst::Dispatcher>.
725 Returns the engine instance. Stringifies to the class name. See
729 =head2 UTILITY METHODS
731 =head2 $c->path_to(@path)
733 Merges C<@path> with C<< $c->config->{home} >> and returns a
734 L<Path::Class::Dir> object.
738 $c->path_to( 'db', 'sqlite.db' );
743 my ( $c, @path ) = @_;
744 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
745 if ( -d $path ) { return $path }
746 else { return Path::Class::File->new( $c->config->{home}, @path ) }
749 =head2 $c->plugin( $name, $class, @args )
751 Helper method for plugins. It creates a classdata accessor/mutator and
752 loads and instantiates the given class.
754 MyApp->plugin( 'prototype', 'HTML::Prototype' );
756 $c->prototype->define_javascript_functions;
761 my ( $class, $name, $plugin, @args ) = @_;
762 $class->_register_plugin( $plugin, 1 );
764 eval { $plugin->import };
765 $class->mk_classdata($name);
767 eval { $obj = $plugin->new(@args) };
770 Catalyst::Exception->throw( message =>
771 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
775 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
781 Initializes the dispatcher and engine, loads any plugins, and loads the
782 model, view, and controller components. You may also specify an array
783 of plugins to load here, if you choose to not load them in the C<use
787 MyApp->setup( qw/-Debug/ );
792 my ( $class, @arguments ) = @_;
794 $class->log->warn("Running setup twice is not a good idea.")
795 if ( $class->setup_finished );
797 unless ( $class->isa('Catalyst') ) {
799 Catalyst::Exception->throw(
800 message => qq/'$class' does not inherit from Catalyst/ );
803 if ( $class->arguments ) {
804 @arguments = ( @arguments, @{ $class->arguments } );
810 foreach (@arguments) {
814 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
816 elsif (/^-(\w+)=?(.*)$/) {
817 $flags->{ lc $1 } = $2;
820 push @{ $flags->{plugins} }, $_;
824 $class->setup_home( delete $flags->{home} );
826 $class->setup_log( delete $flags->{log} );
827 $class->setup_plugins( delete $flags->{plugins} );
828 $class->setup_dispatcher( delete $flags->{dispatcher} );
829 $class->setup_engine( delete $flags->{engine} );
830 $class->setup_stats( delete $flags->{stats} );
832 for my $flag ( sort keys %{$flags} ) {
834 if ( my $code = $class->can( 'setup_' . $flag ) ) {
835 &$code( $class, delete $flags->{$flag} );
838 $class->log->warn(qq/Unknown flag "$flag"/);
842 eval { require Catalyst::Devel; };
843 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
844 $class->log->warn(<<"EOF");
845 You are running an old script!
847 Please update by running (this will overwrite existing files):
848 catalyst.pl -force -scripts $class
850 or (this will not overwrite existing files):
851 catalyst.pl -scripts $class
856 if ( $class->debug ) {
857 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
860 my $t = Text::SimpleTable->new(74);
861 $t->row($_) for @plugins;
862 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
865 my $dispatcher = $class->dispatcher;
866 my $engine = $class->engine;
867 my $home = $class->config->{home};
869 $class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
870 $class->log->debug(qq/Loaded engine "$engine"/);
874 ? $class->log->debug(qq/Found home "$home"/)
875 : $class->log->debug(qq/Home "$home" doesn't exist/)
876 : $class->log->debug(q/Couldn't find home/);
881 no warnings qw/redefine/;
882 local *setup = sub { };
886 # Initialize our data structure
887 $class->components( {} );
889 $class->setup_components;
891 if ( $class->debug ) {
892 my $t = Text::SimpleTable->new( [ 63, 'Class' ], [ 8, 'Type' ] );
893 for my $comp ( sort keys %{ $class->components } ) {
894 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
895 $t->row( $comp, $type );
897 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
898 if ( keys %{ $class->components } );
901 # Add our self to components, since we are also a component
902 $class->components->{$class} = $class;
904 $class->setup_actions;
906 if ( $class->debug ) {
907 my $name = $class->config->{name} || 'Application';
908 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
910 $class->log->_flush() if $class->log->can('_flush');
912 $class->setup_finished(1);
915 =head2 $c->uri_for( $path, @args?, \%query_values? )
917 Merges path with C<< $c->request->base >> for absolute URIs and with
918 C<< $c->namespace >> for relative URIs, then returns a normalized L<URI>
919 object. If any args are passed, they are added at the end of the path.
920 If the last argument to C<uri_for> is a hash reference, it is assumed to
921 contain GET parameter key/value pairs, which will be appended to the URI
924 Note that uri_for is destructive to the passed hashref. Subsequent calls
925 with the same hashref may have unintended results.
927 Instead of C<$path>, you can also optionally pass a C<$action> object
928 which will be resolved to a path using
929 C<< $c->dispatcher->uri_for_action >>; if the first element of
930 C<@args> is an arrayref it is treated as a list of captures to be passed
931 to C<uri_for_action>.
936 my ( $c, $path, @args ) = @_;
938 if ( Scalar::Util::blessed($path) ) { # action object
939 my $captures = ( scalar @args && ref $args[0] eq 'ARRAY'
942 $path = $c->dispatcher->uri_for_action($path, $captures);
943 return undef unless defined($path);
944 $path = '/' if $path eq '';
947 undef($path) if (defined $path && $path eq '');
950 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
952 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
953 s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
955 unshift(@args, $path);
957 unless (defined $path && $path =~ s!^/!!) { # in-place strip
958 my $namespace = $c->namespace;
959 if (defined $path) { # cheesy hack to handle path '../foo'
960 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
962 unshift(@args, $namespace || '');
965 # join args with '/', or a blank string
966 my $args = join('/', grep { defined($_) } @args);
967 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
969 my $base = $c->req->base;
970 my $class = ref($base);
971 $base =~ s{(?<!/)$}{/};
975 if (my @keys = keys %$params) {
976 # somewhat lifted from URI::_query's query_form
977 $query = '?'.join('&', map {
978 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
981 my $val = $params->{$_};
982 $val = '' unless defined $val;
985 utf8::encode( $_ ) if utf8::is_utf8($_);
986 # using the URI::Escape pattern here so utf8 chars survive
987 s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
989 "${key}=$_"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
993 my $res = bless(\"${base}${args}${query}", $class);
997 =head2 $c->welcome_message
999 Returns the Catalyst welcome HTML page.
1003 sub welcome_message {
1005 my $name = $c->config->{name};
1006 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1007 my $prefix = Catalyst::Utils::appprefix( ref $c );
1008 $c->response->content_type('text/html; charset=utf-8');
1010 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1011 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1012 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1014 <meta http-equiv="Content-Language" content="en" />
1015 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1016 <title>$name on Catalyst $VERSION</title>
1017 <style type="text/css">
1020 background-color: #eee;
1027 margin-bottom: 10px;
1029 background-color: #ccc;
1030 border: 1px solid #aaa;
1035 font-family: verdana, tahoma, sans-serif;
1038 font-family: verdana, tahoma, sans-serif;
1041 text-decoration: none;
1043 border-bottom: 1px dotted #bbb;
1045 :link:hover, :visited:hover {
1058 background-color: #fff;
1059 border: 1px solid #aaa;
1063 font-weight: normal;
1085 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1090 <img src="$logo" alt="Catalyst Logo" />
1092 <p>Welcome to the world of Catalyst.
1093 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1094 framework will make web development something you had
1095 never expected it to be: Fun, rewarding, and quick.</p>
1096 <h2>What to do now?</h2>
1097 <p>That really depends on what <b>you</b> want to do.
1098 We do, however, provide you with a few starting points.</p>
1099 <p>If you want to jump right into web development with Catalyst
1100 you might want want to start with a tutorial.</p>
1101 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1103 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1105 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1106 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1108 <h2>What to do next?</h2>
1109 <p>Next it's time to write an actual application. Use the
1110 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1111 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1112 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1113 they can save you a lot of work.</p>
1114 <pre><code>script/${prefix}_create.pl -help</code></pre>
1115 <p>Also, be sure to check out the vast and growing
1116 collection of <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3APlugin%3A%3A&mode=all">plugins for Catalyst on CPAN</a>;
1117 you are likely to find what you need there.
1121 <p>Catalyst has a very active community. Here are the main places to
1122 get in touch with us.</p>
1125 <a href="http://dev.catalyst.perl.org">Wiki</a>
1128 <a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
1131 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1134 <h2>In conclusion</h2>
1135 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1136 as we enjoyed making it. Please contact us if you have ideas
1137 for improvement or other feedback.</p>
1145 =head1 INTERNAL METHODS
1147 These methods are not meant to be used by end users.
1149 =head2 $c->components
1151 Returns a hash of components.
1153 =head2 $c->context_class
1155 Returns or sets the context class.
1159 Returns a hashref containing coderefs and execution counts (needed for
1160 deep recursion detection).
1164 Returns the number of actions on the current internal execution stack.
1168 Dispatches a request to actions.
1172 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1174 =head2 $c->dispatcher_class
1176 Returns or sets the dispatcher class.
1178 =head2 $c->dump_these
1180 Returns a list of 2-element array references (name, structure) pairs
1181 that will be dumped on the error page in debug mode.
1187 [ Request => $c->req ],
1188 [ Response => $c->res ],
1189 [ Stash => $c->stash ],
1190 [ Config => $c->config ];
1193 =head2 $c->engine_class
1195 Returns or sets the engine class.
1197 =head2 $c->execute( $class, $coderef )
1199 Execute a coderef in given class and catch exceptions. Errors are available
1205 my ( $c, $class, $code ) = @_;
1206 $class = $c->component($class) || $class;
1209 if ( $c->depth >= $RECURSION ) {
1210 my $action = "$code";
1211 $action = "/$action" unless $action =~ /->/;
1212 my $error = qq/Deep recursion detected calling "$action"/;
1213 $c->log->error($error);
1219 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1221 push( @{ $c->stack }, $code );
1223 eval { $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 ) };
1225 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1227 my $last = pop( @{ $c->stack } );
1229 if ( my $error = $@ ) {
1230 if ( !ref($error) and $error eq $DETACH ) { die $DETACH if $c->depth > 1 }
1232 unless ( ref $error ) {
1233 no warnings 'uninitialized';
1235 my $class = $last->class;
1236 my $name = $last->name;
1237 $error = qq/Caught exception in $class->$name "$error"/;
1246 sub _stats_start_execute {
1247 my ( $c, $code ) = @_;
1249 return if ( ( $code->name =~ /^_.*/ )
1250 && ( !$c->config->{show_internal_actions} ) );
1252 $c->counter->{"$code"}++;
1254 my $action = "$code";
1255 $action = "/$action" unless $action =~ /->/;
1257 # determine if the call was the result of a forward
1258 # this is done by walking up the call stack and looking for a calling
1259 # sub of Catalyst::forward before the eval
1261 for my $index ( 2 .. 11 ) {
1263 if ( ( caller($index) )[0] eq 'Catalyst'
1264 && ( caller($index) )[3] eq '(eval)' );
1266 if ( ( caller($index) )[3] =~ /forward$/ ) {
1267 $callsub = ( caller($index) )[3];
1268 $action = "-> $action";
1273 my $uid = "$code" . $c->counter->{"$code"};
1275 # is this a root-level call or a forwarded call?
1276 if ( $callsub =~ /forward$/ ) {
1278 # forward, locate the caller
1279 if ( my $parent = $c->stack->[-1] ) {
1282 parent => "$parent" . $c->counter->{"$parent"},
1288 # forward with no caller may come from a plugin
1307 sub _stats_finish_execute {
1308 my ( $c, $info ) = @_;
1309 $c->stats->profile( end => $info );
1312 =head2 $c->_localize_fields( sub { }, \%keys );
1316 sub _localize_fields {
1317 my ( $c, $localized, $code ) = ( @_ );
1319 my $request = delete $localized->{request} || {};
1320 my $response = delete $localized->{response} || {};
1322 local @{ $c }{ keys %$localized } = values %$localized;
1323 local @{ $c->request }{ keys %$request } = values %$request;
1324 local @{ $c->response }{ keys %$response } = values %$response;
1331 Finalizes the request.
1338 for my $error ( @{ $c->error } ) {
1339 $c->log->error($error);
1342 # Allow engine to handle finalize flow (for POE)
1343 if ( $c->engine->can('finalize') ) {
1344 $c->engine->finalize($c);
1348 $c->finalize_uploads;
1351 if ( $#{ $c->error } >= 0 ) {
1355 $c->finalize_headers;
1358 if ( $c->request->method eq 'HEAD' ) {
1359 $c->response->body('');
1365 if ($c->use_stats) {
1366 my $elapsed = sprintf '%f', $c->stats->elapsed;
1367 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1369 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1372 return $c->response->status;
1375 =head2 $c->finalize_body
1381 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1383 =head2 $c->finalize_cookies
1389 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1391 =head2 $c->finalize_error
1397 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1399 =head2 $c->finalize_headers
1405 sub finalize_headers {
1408 # Check if we already finalized headers
1409 return if $c->response->{_finalized_headers};
1412 if ( my $location = $c->response->redirect ) {
1413 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1414 $c->response->header( Location => $location );
1416 if ( !$c->response->body ) {
1417 # Add a default body if none is already present
1419 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1425 if ( $c->response->body && !$c->response->content_length ) {
1427 # get the length from a filehandle
1428 if ( blessed( $c->response->body ) && $c->response->body->can('read') )
1430 my $stat = stat $c->response->body;
1431 if ( $stat && $stat->size > 0 ) {
1432 $c->response->content_length( $stat->size );
1435 $c->log->warn('Serving filehandle without a content-length');
1439 # everything should be bytes at this point, but just in case
1440 $c->response->content_length( bytes::length( $c->response->body ) );
1445 if ( $c->response->status =~ /^(1\d\d|[23]04)$/ ) {
1446 $c->response->headers->remove_header("Content-Length");
1447 $c->response->body('');
1450 $c->finalize_cookies;
1452 $c->engine->finalize_headers( $c, @_ );
1455 $c->response->{_finalized_headers} = 1;
1458 =head2 $c->finalize_output
1460 An alias for finalize_body.
1462 =head2 $c->finalize_read
1464 Finalizes the input after reading is complete.
1468 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1470 =head2 $c->finalize_uploads
1472 Finalizes uploads. Cleans up any temporary files.
1476 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1478 =head2 $c->get_action( $action, $namespace )
1480 Gets an action in a given namespace.
1484 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1486 =head2 $c->get_actions( $action, $namespace )
1488 Gets all actions of a given name in a namespace and all parent
1493 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1495 =head2 $c->handle_request( $class, @arguments )
1497 Called to handle each HTTP request.
1501 sub handle_request {
1502 my ( $class, @arguments ) = @_;
1504 # Always expect worst case!
1507 if ($class->debug) {
1508 my $secs = time - $START || 1;
1509 my $av = sprintf '%.3f', $COUNT / $secs;
1510 my $time = localtime time;
1511 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1514 my $c = $class->prepare(@arguments);
1516 $status = $c->finalize;
1519 if ( my $error = $@ ) {
1521 $class->log->error(qq/Caught exception in engine "$error"/);
1525 $class->log->_flush() if $class->log->can('_flush');
1529 =head2 $c->prepare( @arguments )
1531 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1537 my ( $class, @arguments ) = @_;
1539 $class->context_class( ref $class || $class ) unless $class->context_class;
1540 my $c = $class->context_class->new(
1544 request => $class->request_class->new(
1547 body_parameters => {},
1549 headers => HTTP::Headers->new,
1551 query_parameters => {},
1557 response => $class->response_class->new(
1561 headers => HTTP::Headers->new(),
1570 $c->stats($class->stats_class->new)->enable($c->use_stats);
1572 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1575 # For on-demand data
1576 $c->request->_context($c);
1577 $c->response->_context($c);
1579 # Allow engine to direct the prepare flow (for POE)
1580 if ( $c->engine->can('prepare') ) {
1581 $c->engine->prepare( $c, @arguments );
1584 $c->prepare_request(@arguments);
1585 $c->prepare_connection;
1586 $c->prepare_query_parameters;
1587 $c->prepare_headers;
1588 $c->prepare_cookies;
1591 # Prepare the body for reading, either by prepare_body
1592 # or the user, if they are using $c->read
1595 # Parse the body unless the user wants it on-demand
1596 unless ( $c->config->{parse_on_demand} ) {
1601 my $method = $c->req->method || '';
1602 my $path = $c->req->path || '/';
1603 my $address = $c->req->address || '';
1605 $c->log->debug(qq/"$method" request for "$path" from "$address"/)
1613 =head2 $c->prepare_action
1615 Prepares action. See L<Catalyst::Dispatcher>.
1619 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1621 =head2 $c->prepare_body
1623 Prepares message body.
1630 # Do we run for the first time?
1631 return if defined $c->request->{_body};
1633 # Initialize on-demand data
1634 $c->engine->prepare_body( $c, @_ );
1635 $c->prepare_parameters;
1636 $c->prepare_uploads;
1638 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1639 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1640 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1641 my $param = $c->req->body_parameters->{$key};
1642 my $value = defined($param) ? $param : '';
1644 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1646 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1650 =head2 $c->prepare_body_chunk( $chunk )
1652 Prepares a chunk of data before sending it to L<HTTP::Body>.
1654 See L<Catalyst::Engine>.
1658 sub prepare_body_chunk {
1660 $c->engine->prepare_body_chunk( $c, @_ );
1663 =head2 $c->prepare_body_parameters
1665 Prepares body parameters.
1669 sub prepare_body_parameters {
1671 $c->engine->prepare_body_parameters( $c, @_ );
1674 =head2 $c->prepare_connection
1676 Prepares connection.
1680 sub prepare_connection {
1682 $c->engine->prepare_connection( $c, @_ );
1685 =head2 $c->prepare_cookies
1691 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1693 =head2 $c->prepare_headers
1699 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1701 =head2 $c->prepare_parameters
1703 Prepares parameters.
1707 sub prepare_parameters {
1709 $c->prepare_body_parameters;
1710 $c->engine->prepare_parameters( $c, @_ );
1713 =head2 $c->prepare_path
1715 Prepares path and base.
1719 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
1721 =head2 $c->prepare_query_parameters
1723 Prepares query parameters.
1727 sub prepare_query_parameters {
1730 $c->engine->prepare_query_parameters( $c, @_ );
1732 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
1733 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1734 for my $key ( sort keys %{ $c->req->query_parameters } ) {
1735 my $param = $c->req->query_parameters->{$key};
1736 my $value = defined($param) ? $param : '';
1738 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1740 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1744 =head2 $c->prepare_read
1746 Prepares the input for reading.
1750 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1752 =head2 $c->prepare_request
1754 Prepares the engine request.
1758 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1760 =head2 $c->prepare_uploads
1766 sub prepare_uploads {
1769 $c->engine->prepare_uploads( $c, @_ );
1771 if ( $c->debug && keys %{ $c->request->uploads } ) {
1772 my $t = Text::SimpleTable->new(
1773 [ 12, 'Parameter' ],
1778 for my $key ( sort keys %{ $c->request->uploads } ) {
1779 my $upload = $c->request->uploads->{$key};
1780 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1781 $t->row( $key, $u->filename, $u->type, $u->size );
1784 $c->log->debug( "File Uploads are:\n" . $t->draw );
1788 =head2 $c->prepare_write
1790 Prepares the output for writing.
1794 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1796 =head2 $c->request_class
1798 Returns or sets the request class.
1800 =head2 $c->response_class
1802 Returns or sets the response class.
1804 =head2 $c->read( [$maxlength] )
1806 Reads a chunk of data from the request body. This method is designed to
1807 be used in a while loop, reading C<$maxlength> bytes on every call.
1808 C<$maxlength> defaults to the size of the request if not specified.
1810 You have to set C<< MyApp->config->{parse_on_demand} >> to use this
1813 Warning: If you use read(), Catalyst will not process the body,
1814 so you will not be able to access POST parameters or file uploads via
1815 $c->request. You must handle all body parsing yourself.
1819 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1827 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1829 =head2 $c->set_action( $action, $code, $namespace, $attrs )
1831 Sets an action in a given namespace.
1835 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1837 =head2 $c->setup_actions($component)
1839 Sets up actions for a component.
1843 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1845 =head2 $c->setup_components
1847 Sets up components. Specify a C<setup_components> config option to pass
1848 additional options directly to L<Module::Pluggable>. To add additional
1849 search paths, specify a key named C<search_extra> as an array
1850 reference. Items in the array beginning with C<::> will have the
1851 application class name prepended to them.
1855 sub setup_components {
1858 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
1859 my $config = $class->config->{ setup_components };
1860 my $extra = delete $config->{ search_extra } || [];
1862 push @paths, @$extra;
1864 my $locator = Module::Pluggable::Object->new(
1865 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
1869 my @comps = sort { length $a <=> length $b } $locator->plugins;
1870 my %comps = map { $_ => 1 } @comps;
1872 for my $component ( @comps ) {
1874 # We pass ignore_loaded here so that overlay files for (e.g.)
1875 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
1876 # we know M::P::O found a file on disk so this is safe
1878 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
1880 my $module = $class->setup_component( $component );
1882 $component => $module,
1884 $_ => $class->setup_component( $_ )
1886 not exists $comps{$_}
1887 } Devel::InnerPackage::list_packages( $component )
1890 for my $key ( keys %modules ) {
1891 $class->components->{ $key } = $modules{ $key };
1896 =head2 $c->setup_component
1900 sub setup_component {
1901 my( $class, $component ) = @_;
1903 unless ( $component->can( 'COMPONENT' ) ) {
1907 my $suffix = Catalyst::Utils::class2classsuffix( $component );
1908 my $config = $class->config->{ $suffix } || {};
1910 my $instance = eval { $component->COMPONENT( $class, $config ); };
1912 if ( my $error = $@ ) {
1914 Catalyst::Exception->throw(
1915 message => qq/Couldn't instantiate component "$component", "$error"/
1919 Catalyst::Exception->throw(
1921 qq/Couldn't instantiate component "$component", "COMPONENT() didn't return an object-like value"/
1922 ) unless eval { $instance->can( 'can' ) };
1927 =head2 $c->setup_dispatcher
1933 sub setup_dispatcher {
1934 my ( $class, $dispatcher ) = @_;
1937 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1940 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
1941 $dispatcher = 'Catalyst::Dispatcher::' . $env;
1944 unless ($dispatcher) {
1945 $dispatcher = $class->dispatcher_class;
1948 unless (Class::Inspector->loaded($dispatcher)) {
1949 require Class::Inspector->filename($dispatcher);
1952 # dispatcher instance
1953 $class->dispatcher( $dispatcher->new );
1956 =head2 $c->setup_engine
1963 my ( $class, $engine ) = @_;
1966 $engine = 'Catalyst::Engine::' . $engine;
1969 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
1970 $engine = 'Catalyst::Engine::' . $env;
1973 if ( $ENV{MOD_PERL} ) {
1975 # create the apache method
1978 *{"$class\::apache"} = sub { shift->engine->apache };
1981 my ( $software, $version ) =
1982 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
1985 $version =~ s/(\.[^.]+)\./$1/g;
1987 if ( $software eq 'mod_perl' ) {
1991 if ( $version >= 1.99922 ) {
1992 $engine = 'Catalyst::Engine::Apache2::MP20';
1995 elsif ( $version >= 1.9901 ) {
1996 $engine = 'Catalyst::Engine::Apache2::MP19';
1999 elsif ( $version >= 1.24 ) {
2000 $engine = 'Catalyst::Engine::Apache::MP13';
2004 Catalyst::Exception->throw( message =>
2005 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2010 # install the correct mod_perl handler
2011 if ( $version >= 1.9901 ) {
2012 *handler = sub : method {
2013 shift->handle_request(@_);
2017 *handler = sub ($$) { shift->handle_request(@_) };
2022 elsif ( $software eq 'Zeus-Perl' ) {
2023 $engine = 'Catalyst::Engine::Zeus';
2027 Catalyst::Exception->throw(
2028 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2033 $engine = $class->engine_class;
2036 unless (Class::Inspector->loaded($engine)) {
2037 require Class::Inspector->filename($engine);
2040 # check for old engines that are no longer compatible
2042 if ( $engine->isa('Catalyst::Engine::Apache')
2043 && !Catalyst::Engine::Apache->VERSION )
2048 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2049 && Catalyst::Engine::Server->VERSION le '0.02' )
2054 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2055 && $engine->VERSION eq '0.01' )
2060 elsif ($engine->isa('Catalyst::Engine::Zeus')
2061 && $engine->VERSION eq '0.01' )
2067 Catalyst::Exception->throw( message =>
2068 qq/Engine "$engine" is not supported by this version of Catalyst/
2073 $class->engine( $engine->new );
2076 =head2 $c->setup_home
2078 Sets up the home directory.
2083 my ( $class, $home ) = @_;
2085 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2090 $home = Catalyst::Utils::home($class);
2094 $class->config->{home} ||= $home;
2095 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2099 =head2 $c->setup_log
2106 my ( $class, $debug ) = @_;
2108 unless ( $class->log ) {
2109 $class->log( Catalyst::Log->new );
2112 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2113 if ( defined($env_debug) ? $env_debug : $debug ) {
2115 *{"$class\::debug"} = sub { 1 };
2116 $class->log->debug('Debug messages enabled');
2120 =head2 $c->setup_plugins
2126 =head2 $c->setup_stats
2128 Sets up timing statistics class.
2133 my ( $class, $stats ) = @_;
2135 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2137 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2138 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2140 *{"$class\::use_stats"} = sub { 1 };
2141 $class->log->debug('Statistics enabled');
2146 =head2 $c->registered_plugins
2148 Returns a sorted list of the plugins which have either been stated in the
2149 import list or which have been added via C<< MyApp->plugin(@args); >>.
2151 If passed a given plugin name, it will report a boolean value indicating
2152 whether or not that plugin is loaded. A fully qualified name is required if
2153 the plugin name does not begin with C<Catalyst::Plugin::>.
2155 if ($c->registered_plugins('Some::Plugin')) {
2163 sub registered_plugins {
2165 return sort keys %{ $proto->_plugins } unless @_;
2167 return 1 if exists $proto->_plugins->{$plugin};
2168 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2171 sub _register_plugin {
2172 my ( $proto, $plugin, $instant ) = @_;
2173 my $class = ref $proto || $proto;
2175 # no ignore_loaded here, the plugin may already have been
2176 # defined in memory and we don't want to error on "no file" if so
2178 Catalyst::Utils::ensure_class_loaded( $plugin );
2180 $proto->_plugins->{$plugin} = 1;
2183 unshift @{"$class\::ISA"}, $plugin;
2189 my ( $class, $plugins ) = @_;
2191 $class->_plugins( {} ) unless $class->_plugins;
2193 for my $plugin ( reverse @$plugins ) {
2195 unless ( $plugin =~ s/\A\+// ) {
2196 $plugin = "Catalyst::Plugin::$plugin";
2199 $class->_register_plugin($plugin);
2206 Returns an arrayref of the internal execution stack (actions that are
2207 currently executing).
2209 =head2 $c->stats_class
2211 Returns or sets the stats (timing statistics) class.
2213 =head2 $c->use_stats
2215 Returns 1 when stats collection is enabled. Stats collection is enabled
2216 when the -Stats options is set, debug is on or when the <MYAPP>_STATS
2217 environment variable is set.
2219 Note that this is a static method, not an accessor and should be overloaded
2220 by declaring "sub use_stats { 1 }" in your MyApp.pm, not by calling $c->use_stats(1).
2227 =head2 $c->write( $data )
2229 Writes $data to the output stream. When using this method directly, you
2230 will need to manually set the C<Content-Length> header to the length of
2231 your output data, if known.
2238 # Finalize headers if someone manually writes output
2239 $c->finalize_headers;
2241 return $c->engine->write( $c, @_ );
2246 Returns the Catalyst version number. Mostly useful for "powered by"
2247 messages in template systems.
2251 sub version { return $Catalyst::VERSION }
2253 =head1 INTERNAL ACTIONS
2255 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2256 C<_ACTION>, and C<_END>. These are by default not shown in the private
2257 action table, but you can make them visible with a config parameter.
2259 MyApp->config->{show_internal_actions} = 1;
2261 =head1 CASE SENSITIVITY
2263 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> is
2264 mapped to C</foo/bar>. You can activate case sensitivity with a config
2267 MyApp->config->{case_sensitive} = 1;
2269 This causes C<MyApp::C::Foo::Bar> to map to C</Foo/Bar>.
2271 =head1 ON-DEMAND PARSER
2273 The request body is usually parsed at the beginning of a request,
2274 but if you want to handle input yourself, you can enable on-demand
2275 parsing with a config parameter.
2277 MyApp->config->{parse_on_demand} = 1;
2279 =head1 PROXY SUPPORT
2281 Many production servers operate using the common double-server approach,
2282 with a lightweight frontend web server passing requests to a larger
2283 backend server. An application running on the backend server must deal
2284 with two problems: the remote user always appears to be C<127.0.0.1> and
2285 the server's hostname will appear to be C<localhost> regardless of the
2286 virtual host that the user connected through.
2288 Catalyst will automatically detect this situation when you are running
2289 the frontend and backend servers on the same machine. The following
2290 changes are made to the request.
2292 $c->req->address is set to the user's real IP address, as read from
2293 the HTTP X-Forwarded-For header.
2295 The host value for $c->req->base and $c->req->uri is set to the real
2296 host, as read from the HTTP X-Forwarded-Host header.
2298 Obviously, your web server must support these headers for this to work.
2300 In a more complex server farm environment where you may have your
2301 frontend proxy server(s) on different machines, you will need to set a
2302 configuration option to tell Catalyst to read the proxied data from the
2305 MyApp->config->{using_frontend_proxy} = 1;
2307 If you do not wish to use the proxy support at all, you may set:
2309 MyApp->config->{ignore_frontend_proxy} = 1;
2311 =head1 THREAD SAFETY
2313 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2314 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2315 believe the Catalyst core to be thread-safe.
2317 If you plan to operate in a threaded environment, remember that all other
2318 modules you are using must also be thread-safe. Some modules, most notably
2319 L<DBD::SQLite>, are not thread-safe.
2325 Join #catalyst on irc.perl.org.
2329 http://lists.rawmode.org/mailman/listinfo/catalyst
2330 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
2334 http://catalyst.perl.org
2338 http://dev.catalyst.perl.org
2342 =head2 L<Task::Catalyst> - All you need to start with Catalyst
2344 =head2 L<Catalyst::Manual> - The Catalyst Manual
2346 =head2 L<Catalyst::Component>, L<Catalyst::Base> - Base classes for components
2348 =head2 L<Catalyst::Engine> - Core engine
2350 =head2 L<Catalyst::Log> - Log class.
2352 =head2 L<Catalyst::Request> - Request object
2354 =head2 L<Catalyst::Response> - Response object
2356 =head2 L<Catalyst::Test> - The test suite.
2430 Sebastian Riedel, C<sri@oook.de>
2434 This library is free software, you can redistribute it and/or modify it under
2435 the same terms as Perl itself.