4 use base '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/
37 sub depth { scalar @{ shift->stack || [] }; }
44 # For backwards compatibility
45 *finalize_output = \&finalize_body;
50 our $RECURSION = 1000;
51 our $DETACH = "catalyst_detach\n";
53 __PACKAGE__->mk_classdata($_)
54 for qw/components arguments dispatcher engine log dispatcher_class
55 engine_class context_class request_class response_class stats_class
58 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
59 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
60 __PACKAGE__->request_class('Catalyst::Request');
61 __PACKAGE__->response_class('Catalyst::Response');
62 __PACKAGE__->stats_class('Catalyst::Stats');
64 # Remember to update this in Catalyst::Runtime as well!
66 our $VERSION = '5.7014';
69 my ( $class, @arguments ) = @_;
71 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
73 return unless $class eq 'Catalyst';
75 my $caller = caller(0);
77 unless ( $caller->isa('Catalyst') ) {
79 push @{"$caller\::ISA"}, $class, 'Catalyst::Controller';
82 $caller->arguments( [@arguments] );
88 Catalyst - The Elegant MVC Web Application Framework
92 See the L<Catalyst::Manual> distribution for comprehensive
93 documentation and tutorials.
95 # Install Catalyst::Devel for helpers and other development tools
96 # use the helper to create a new application
99 # add models, views, controllers
100 script/myapp_create.pl model MyDatabase DBIC::Schema create=dynamic dbi:SQLite:/path/to/db
101 script/myapp_create.pl view MyTemplate TT
102 script/myapp_create.pl controller Search
104 # built in testserver -- use -r to restart automatically on changes
105 # --help to see all available options
106 script/myapp_server.pl
108 # command line testing interface
109 script/myapp_test.pl /yada
112 use Catalyst qw/-Debug/; # include plugins here as well
114 ### In lib/MyApp/Controller/Root.pm (autocreated)
115 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
116 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
117 $c->stash->{template} = 'foo.tt'; # set the template
118 # lookup something from db -- stash vars are passed to TT
120 $c->model('Database::Foo')->search( { country => $args[0] } );
121 if ( $c->req->params->{bar} ) { # access GET or POST parameters
122 $c->forward( 'bar' ); # process another action
123 # do something else after forward returns
127 # The foo.tt TT template can use the stash data from the database
128 [% WHILE (item = data.next) %]
132 # called for /bar/of/soap, /bar/of/soap/10, etc.
133 sub bar : Path('/bar/of/soap') { ... }
135 # called for all actions, from the top-most controller downwards
137 my ( $self, $c ) = @_;
138 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
139 $c->res->redirect( '/login' ); # require login
140 return 0; # abort request and go immediately to end()
142 return 1; # success; carry on to next action
145 # called after all actions are finished
147 my ( $self, $c ) = @_;
148 if ( scalar @{ $c->error } ) { ... } # handle errors
149 return if $c->res->body; # already have a response
150 $c->forward( 'MyApp::View::TT' ); # render template
153 ### in MyApp/Controller/Foo.pm
154 # called for /foo/bar
155 sub bar : Local { ... }
157 # called for /blargle
158 sub blargle : Global { ... }
160 # an index action matches /foo, but not /foo/1, etc.
161 sub index : Private { ... }
163 ### in MyApp/Controller/Foo/Bar.pm
164 # called for /foo/bar/baz
165 sub baz : Local { ... }
167 # first Root auto is called, then Foo auto, then this
168 sub auto : Private { ... }
170 # powerful regular expression paths are also possible
171 sub details : Regex('^product/(\w+)/details$') {
172 my ( $self, $c ) = @_;
173 # extract the (\w+) from the URI
174 my $product = $c->req->captures->[0];
177 See L<Catalyst::Manual::Intro> for additional information.
181 Catalyst is a modern framework for making web applications without the
182 pain usually associated with this process. This document is a reference
183 to the main Catalyst application. If you are a new user, we suggest you
184 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
186 See L<Catalyst::Manual> for more documentation.
188 Catalyst plugins can be loaded by naming them as arguments to the "use
189 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
190 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
193 use Catalyst qw/My::Module/;
195 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
196 fully qualify the name by using a unary plus:
200 +Fully::Qualified::Plugin::Name
203 Special flags like C<-Debug> and C<-Engine> can also be specified as
204 arguments when Catalyst is loaded:
206 use Catalyst qw/-Debug My::Module/;
208 The position of plugins and flags in the chain is important, because
209 they are loaded in the order in which they appear.
211 The following flags are supported:
215 Enables debug output. You can also force this setting from the system
216 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
217 settings override the application, with <MYAPP>_DEBUG having the highest
222 Forces Catalyst to use a specific engine. Omit the
223 C<Catalyst::Engine::> prefix of the engine name, i.e.:
225 use Catalyst qw/-Engine=CGI/;
229 Forces Catalyst to use a specific home directory, e.g.:
231 use Catalyst qw[-Home=/usr/mst];
233 This can also be done in the shell environment by setting either the
234 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
235 is replaced with the uppercased name of your application, any "::" in
236 the name will be replaced with underscores, e.g. MyApp::Web should use
237 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
245 Enables statistics collection and reporting. You can also force this setting
246 from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
247 environment settings override the application, with <MYAPP>_STATS having the
252 use Catalyst qw/-Stats=1/
256 =head2 INFORMATION ABOUT THE CURRENT REQUEST
260 Returns a L<Catalyst::Action> object for the current action, which
261 stringifies to the action name. See L<Catalyst::Action>.
265 Returns the namespace of the current action, i.e., the URI prefix
266 corresponding to the controller of the current action. For example:
268 # in Controller::Foo::Bar
269 $c->namespace; # returns 'foo/bar';
275 Returns the current L<Catalyst::Request> object, giving access to
276 information about the current client request (including parameters,
277 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
279 =head2 REQUEST FLOW HANDLING
281 =head2 $c->forward( $action [, \@arguments ] )
283 =head2 $c->forward( $class, $method, [, \@arguments ] )
285 Forwards processing to another action, by its private name. If you give a
286 class name but no method, C<process()> is called. You may also optionally
287 pass arguments in an arrayref. The action will receive the arguments in
288 C<@_> and C<< $c->req->args >>. Upon returning from the function,
289 C<< $c->req->args >> will be restored to the previous values.
291 Any data C<return>ed from the action forwarded to, will be returned by the
294 my $foodata = $c->forward('/foo');
295 $c->forward('index');
296 $c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/);
297 $c->forward('MyApp::View::TT');
299 Note that forward implies an C<<eval { }>> around the call (actually
300 C<execute> does), thus de-fatalizing all 'dies' within the called
301 action. If you want C<die> to propagate you need to do something like:
304 die $c->error if $c->error;
306 Or make sure to always return true values from your actions and write
309 $c->forward('foo') || return;
313 sub forward { my $c = shift; $c->dispatcher->forward( $c, @_ ) }
315 =head2 $c->detach( $action [, \@arguments ] )
317 =head2 $c->detach( $class, $method, [, \@arguments ] )
321 The same as C<forward>, but doesn't return to the previous action when
322 processing is finished.
324 When called with no arguments it escapes the processing chain entirely.
328 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
334 Returns the current L<Catalyst::Response> object, see there for details.
338 Returns a hashref to the stash, which may be used to store data and pass
339 it between components during a request. You can also set hash keys by
340 passing arguments. The stash is automatically sent to the view. The
341 stash is cleared at the end of a request; it cannot be used for
342 persistent storage (for this you must use a session; see
343 L<Catalyst::Plugin::Session> for a complete system integrated with
346 $c->stash->{foo} = $bar;
347 $c->stash( { moose => 'majestic', qux => 0 } );
348 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
350 # stash is automatically passed to the view for use in a template
351 $c->forward( 'MyApp::View::TT' );
358 my $stash = @_ > 1 ? {@_} : $_[0];
359 croak('stash takes a hash or hashref') unless ref $stash;
360 foreach my $key ( keys %$stash ) {
361 $c->{stash}->{$key} = $stash->{$key};
369 =head2 $c->error($error, ...)
371 =head2 $c->error($arrayref)
373 Returns an arrayref containing error messages. If Catalyst encounters an
374 error while processing a request, it stores the error in $c->error. This
375 method should only be used to store fatal error messages.
377 my @error = @{ $c->error };
381 $c->error('Something bad happened');
388 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
389 croak @$error unless ref $c;
390 push @{ $c->{error} }, @$error;
392 elsif ( defined $_[0] ) { $c->{error} = undef }
393 return $c->{error} || [];
399 Contains the return value of the last executed action.
401 =head2 $c->clear_errors
403 Clear errors. You probably don't want to clear the errors unless you are
404 implementing a custom error screen.
406 This is equivalent to running
420 my ( $c, @names ) = @_;
422 foreach my $name (@names) {
423 foreach my $component ( keys %{ $c->components } ) {
424 return $c->components->{$component} if $component =~ /$name/i;
431 # try explicit component names
433 my ( $c, @names ) = @_;
435 foreach my $try (@names) {
436 return $c->components->{$try} if ( exists $c->components->{$try} );
442 # like component, but try just these prefixes before regex searching,
443 # and do not try to return "sort keys %{ $c->components }"
445 my ( $c, $name, @prefixes ) = @_;
447 my $appclass = ref $c || $c;
449 my @names = map { "${appclass}::${_}::${name}" } @prefixes;
451 my $comp = $c->_comp_explicit(@names);
452 return $comp if defined($comp);
453 $comp = $c->_comp_search($name);
457 # Find possible names for a prefix
460 my ( $c, @prefixes ) = @_;
462 my $appclass = ref $c || $c;
464 my @pre = map { "${appclass}::${_}::" } @prefixes;
468 COMPONENT: foreach my $comp ($c->component) {
469 foreach my $p (@pre) {
470 if ($comp =~ s/^$p//) {
480 # Return a component if only one matches.
482 my ( $c, @prefixes ) = @_;
484 my $appclass = ref $c || $c;
486 my ( $comp, $rest ) =
487 map { $c->_comp_search("^${appclass}::${_}::") } @prefixes;
488 return $comp unless $rest;
491 # Filter a component before returning by calling ACCEPT_CONTEXT if available
492 sub _filter_component {
493 my ( $c, $comp, @args ) = @_;
494 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
495 return $comp->ACCEPT_CONTEXT( $c, @args );
497 else { return $comp }
500 =head2 COMPONENT ACCESSORS
502 =head2 $c->controller($name)
504 Gets a L<Catalyst::Controller> instance by name.
506 $c->controller('Foo')->do_stuff;
508 If the name is omitted, will return the controller for the dispatched
514 my ( $c, $name, @args ) = @_;
515 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Controller C/ ),
518 return $c->component( $c->action->class );
521 =head2 $c->model($name)
523 Gets a L<Catalyst::Model> instance by name.
525 $c->model('Foo')->do_stuff;
527 Any extra arguments are directly passed to ACCEPT_CONTEXT.
529 If the name is omitted, it will look for
530 - a model object in $c->stash{current_model_instance}, then
531 - a model name in $c->stash->{current_model}, then
532 - a config setting 'default_model', or
533 - check if there is only one model, and return it if that's the case.
538 my ( $c, $name, @args ) = @_;
539 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Model M/ ),
543 return $c->stash->{current_model_instance}
544 if $c->stash->{current_model_instance};
545 return $c->model( $c->stash->{current_model} )
546 if $c->stash->{current_model};
548 return $c->model( $c->config->{default_model} )
549 if $c->config->{default_model};
550 return $c->_filter_component( $c->_comp_singular(qw/Model M/) );
554 =head2 $c->controllers
556 Returns the available names which can be passed to $c->controller
562 return $c->_comp_names(qw/Controller C/);
566 =head2 $c->view($name)
568 Gets a L<Catalyst::View> instance by name.
570 $c->view('Foo')->do_stuff;
572 Any extra arguments are directly passed to ACCEPT_CONTEXT.
574 If the name is omitted, it will look for
575 - a view object in $c->stash{current_view_instance}, then
576 - a view name in $c->stash->{current_view}, then
577 - a config setting 'default_view', or
578 - check if there is only one view, and return it if that's the case.
583 my ( $c, $name, @args ) = @_;
584 return $c->_filter_component( $c->_comp_prefixes( $name, qw/View V/ ),
588 return $c->stash->{current_view_instance}
589 if $c->stash->{current_view_instance};
590 return $c->view( $c->stash->{current_view} )
591 if $c->stash->{current_view};
593 return $c->view( $c->config->{default_view} )
594 if $c->config->{default_view};
595 return $c->_filter_component( $c->_comp_singular(qw/View V/) );
600 Returns the available names which can be passed to $c->model
606 return $c->_comp_names(qw/Model M/);
612 Returns the available names which can be passed to $c->view
618 return $c->_comp_names(qw/View V/);
621 =head2 $c->comp($name)
623 =head2 $c->component($name)
625 Gets a component object by name. This method is not recommended,
626 unless you want to get a specific component by full
627 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
628 should be used instead.
639 my $appclass = ref $c || $c;
642 $name, "${appclass}::${name}",
643 map { "${appclass}::${_}::${name}" }
644 qw/Model M Controller C View V/
647 my $comp = $c->_comp_explicit(@names);
648 return $c->_filter_component( $comp, @_ ) if defined($comp);
650 $comp = $c->_comp_search($name);
651 return $c->_filter_component( $comp, @_ ) if defined($comp);
654 return sort keys %{ $c->components };
659 =head2 CLASS DATA AND HELPER CLASSES
663 Returns or takes a hashref containing the application's configuration.
665 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
667 You can also use a C<YAML>, C<XML> or C<Config::General> config file
668 like myapp.yml in your applications home directory. See
669 L<Catalyst::Plugin::ConfigLoader>.
672 db: dsn:SQLite:foo.db
680 $c->log->warn("Setting config after setup has been run is not a good idea.")
681 if ( @_ and $c->setup_finished );
683 $c->NEXT::config(@_);
688 Returns the logging object instance. Unless it is already set, Catalyst
689 sets this up with a L<Catalyst::Log> object. To use your own log class,
690 set the logger with the C<< __PACKAGE__->log >> method prior to calling
691 C<< __PACKAGE__->setup >>.
693 __PACKAGE__->log( MyLogger->new );
698 $c->log->info( 'Now logging with my own logger!' );
700 Your log class should implement the methods described in
706 Overload to enable debug messages (same as -Debug option).
708 Note that this is a static method, not an accessor and should be overloaded
709 by declaring "sub debug { 1 }" in your MyApp.pm, not by calling $c->debug(1).
715 =head2 $c->dispatcher
717 Returns the dispatcher instance. Stringifies to class name. See
718 L<Catalyst::Dispatcher>.
722 Returns the engine instance. Stringifies to the class name. See
726 =head2 UTILITY METHODS
728 =head2 $c->path_to(@path)
730 Merges C<@path> with C<< $c->config->{home} >> and returns a
731 L<Path::Class::Dir> object. Must be called after C<< MyApp->setup >>,
732 which sets up C<< $c->config->{home} >>.
736 $c->path_to( 'db', 'sqlite.db' );
741 my ( $c, @path ) = @_;
742 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
743 if ( -d $path ) { return $path }
744 else { return Path::Class::File->new( $c->config->{home}, @path ) }
747 =head2 $c->plugin( $name, $class, @args )
749 Helper method for plugins. It creates a classdata accessor/mutator and
750 loads and instantiates the given class.
752 MyApp->plugin( 'prototype', 'HTML::Prototype' );
754 $c->prototype->define_javascript_functions;
759 my ( $class, $name, $plugin, @args ) = @_;
760 $class->_register_plugin( $plugin, 1 );
762 eval { $plugin->import };
763 $class->mk_classdata($name);
765 eval { $obj = $plugin->new(@args) };
768 Catalyst::Exception->throw( message =>
769 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
773 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
779 Initializes the dispatcher and engine, loads any plugins, and loads the
780 model, view, and controller components. You may also specify an array
781 of plugins to load here, if you choose to not load them in the C<use
785 MyApp->setup( qw/-Debug/ );
790 my ( $class, @arguments ) = @_;
792 $class->log->warn("Running setup twice is not a good idea.")
793 if ( $class->setup_finished );
795 unless ( $class->isa('Catalyst') ) {
797 Catalyst::Exception->throw(
798 message => qq/'$class' does not inherit from Catalyst/ );
801 if ( $class->arguments ) {
802 @arguments = ( @arguments, @{ $class->arguments } );
808 foreach (@arguments) {
812 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
814 elsif (/^-(\w+)=?(.*)$/) {
815 $flags->{ lc $1 } = $2;
818 push @{ $flags->{plugins} }, $_;
822 $class->setup_home( delete $flags->{home} );
824 $class->setup_log( delete $flags->{log} );
825 $class->setup_plugins( delete $flags->{plugins} );
826 $class->setup_dispatcher( delete $flags->{dispatcher} );
827 $class->setup_engine( delete $flags->{engine} );
828 $class->setup_stats( delete $flags->{stats} );
830 for my $flag ( sort keys %{$flags} ) {
832 if ( my $code = $class->can( 'setup_' . $flag ) ) {
833 &$code( $class, delete $flags->{$flag} );
836 $class->log->warn(qq/Unknown flag "$flag"/);
840 eval { require Catalyst::Devel; };
841 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
842 $class->log->warn(<<"EOF");
843 You are running an old script!
845 Please update by running (this will overwrite existing files):
846 catalyst.pl -force -scripts $class
848 or (this will not overwrite existing files):
849 catalyst.pl -scripts $class
854 if ( $class->debug ) {
855 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
858 my $t = Text::SimpleTable->new(74);
859 $t->row($_) for @plugins;
860 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
863 my $dispatcher = $class->dispatcher;
864 my $engine = $class->engine;
865 my $home = $class->config->{home};
867 $class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
868 $class->log->debug(qq/Loaded engine "$engine"/);
872 ? $class->log->debug(qq/Found home "$home"/)
873 : $class->log->debug(qq/Home "$home" doesn't exist/)
874 : $class->log->debug(q/Couldn't find home/);
879 no warnings qw/redefine/;
880 local *setup = sub { };
884 # Initialize our data structure
885 $class->components( {} );
887 $class->setup_components;
889 if ( $class->debug ) {
890 my $t = Text::SimpleTable->new( [ 63, 'Class' ], [ 8, 'Type' ] );
891 for my $comp ( sort keys %{ $class->components } ) {
892 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
893 $t->row( $comp, $type );
895 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
896 if ( keys %{ $class->components } );
899 # Add our self to components, since we are also a component
900 $class->components->{$class} = $class;
902 $class->setup_actions;
904 if ( $class->debug ) {
905 my $name = $class->config->{name} || 'Application';
906 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
908 $class->log->_flush() if $class->log->can('_flush');
910 $class->setup_finished(1);
913 =head2 $c->uri_for( $path, @args?, \%query_values? )
915 Merges path with C<< $c->request->base >> for absolute URIs and with
916 C<< $c->namespace >> for relative URIs, then returns a normalized L<URI>
917 object. If any args are passed, they are added at the end of the path.
918 If the last argument to C<uri_for> is a hash reference, it is assumed to
919 contain GET parameter key/value pairs, which will be appended to the URI
922 Note that uri_for is destructive to the passed hashref. Subsequent calls
923 with the same hashref may have unintended results.
925 Instead of C<$path>, you can also optionally pass a C<$action> object
926 which will be resolved to a path using
927 C<< $c->dispatcher->uri_for_action >>; if the first element of
928 C<@args> is an arrayref it is treated as a list of captures to be passed
929 to C<uri_for_action>.
934 my ( $c, $path, @args ) = @_;
936 if ( Scalar::Util::blessed($path) ) { # action object
937 my $captures = ( scalar @args && ref $args[0] eq 'ARRAY'
940 $path = $c->dispatcher->uri_for_action($path, $captures);
941 return undef unless defined($path);
942 $path = '/' if $path eq '';
945 undef($path) if (defined $path && $path eq '');
948 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
950 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
951 s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
953 unshift(@args, $path);
955 unless (defined $path && $path =~ s!^/!!) { # in-place strip
956 my $namespace = $c->namespace;
957 if (defined $path) { # cheesy hack to handle path '../foo'
958 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
960 unshift(@args, $namespace || '');
963 # join args with '/', or a blank string
964 my $args = join('/', grep { defined($_) } @args);
965 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
967 my $base = $c->req->base;
968 my $class = ref($base);
969 $base =~ s{(?<!/)$}{/};
973 if (my @keys = keys %$params) {
974 # somewhat lifted from URI::_query's query_form
975 $query = '?'.join('&', map {
976 my $val = $params->{$_};
977 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
980 $val = '' unless defined $val;
983 utf8::encode( $_ ) if utf8::is_utf8($_);
984 # using the URI::Escape pattern here so utf8 chars survive
985 s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
987 "${key}=$_"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
991 my $res = bless(\"${base}${args}${query}", $class);
995 =head2 $c->welcome_message
997 Returns the Catalyst welcome HTML page.
1001 sub welcome_message {
1003 my $name = $c->config->{name};
1004 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1005 my $prefix = Catalyst::Utils::appprefix( ref $c );
1006 $c->response->content_type('text/html; charset=utf-8');
1008 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1009 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1010 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1012 <meta http-equiv="Content-Language" content="en" />
1013 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1014 <title>$name on Catalyst $VERSION</title>
1015 <style type="text/css">
1018 background-color: #eee;
1025 margin-bottom: 10px;
1027 background-color: #ccc;
1028 border: 1px solid #aaa;
1033 font-family: verdana, tahoma, sans-serif;
1036 font-family: verdana, tahoma, sans-serif;
1039 text-decoration: none;
1041 border-bottom: 1px dotted #bbb;
1043 :link:hover, :visited:hover {
1056 background-color: #fff;
1057 border: 1px solid #aaa;
1061 font-weight: normal;
1083 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1088 <img src="$logo" alt="Catalyst Logo" />
1090 <p>Welcome to the world of Catalyst.
1091 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1092 framework will make web development something you had
1093 never expected it to be: Fun, rewarding, and quick.</p>
1094 <h2>What to do now?</h2>
1095 <p>That really depends on what <b>you</b> want to do.
1096 We do, however, provide you with a few starting points.</p>
1097 <p>If you want to jump right into web development with Catalyst
1098 you might want to start with a tutorial.</p>
1099 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1101 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1103 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1104 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1106 <h2>What to do next?</h2>
1107 <p>Next it's time to write an actual application. Use the
1108 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1109 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1110 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1111 they can save you a lot of work.</p>
1112 <pre><code>script/${prefix}_create.pl -help</code></pre>
1113 <p>Also, be sure to check out the vast and growing
1114 collection of <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3APlugin%3A%3A&mode=all">plugins for Catalyst on CPAN</a>;
1115 you are likely to find what you need there.
1119 <p>Catalyst has a very active community. Here are the main places to
1120 get in touch with us.</p>
1123 <a href="http://dev.catalyst.perl.org">Wiki</a>
1126 <a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
1129 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1132 <h2>In conclusion</h2>
1133 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1134 as we enjoyed making it. Please contact us if you have ideas
1135 for improvement or other feedback.</p>
1143 =head1 INTERNAL METHODS
1145 These methods are not meant to be used by end users.
1147 =head2 $c->components
1149 Returns a hash of components.
1151 =head2 $c->context_class
1153 Returns or sets the context class.
1157 Returns a hashref containing coderefs and execution counts (needed for
1158 deep recursion detection).
1162 Returns the number of actions on the current internal execution stack.
1166 Dispatches a request to actions.
1170 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1172 =head2 $c->dispatcher_class
1174 Returns or sets the dispatcher class.
1176 =head2 $c->dump_these
1178 Returns a list of 2-element array references (name, structure) pairs
1179 that will be dumped on the error page in debug mode.
1185 [ Request => $c->req ],
1186 [ Response => $c->res ],
1187 [ Stash => $c->stash ],
1188 [ Config => $c->config ];
1191 =head2 $c->engine_class
1193 Returns or sets the engine class.
1195 =head2 $c->execute( $class, $coderef )
1197 Execute a coderef in given class and catch exceptions. Errors are available
1203 my ( $c, $class, $code ) = @_;
1204 $class = $c->component($class) || $class;
1207 if ( $c->depth >= $RECURSION ) {
1208 my $action = "$code";
1209 $action = "/$action" unless $action =~ /->/;
1210 my $error = qq/Deep recursion detected calling "$action"/;
1211 $c->log->error($error);
1217 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1219 push( @{ $c->stack }, $code );
1221 eval { $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 ) };
1223 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1225 my $last = pop( @{ $c->stack } );
1227 if ( my $error = $@ ) {
1228 if ( !ref($error) and $error eq $DETACH ) { die $DETACH if $c->depth > 1 }
1230 unless ( ref $error ) {
1231 no warnings 'uninitialized';
1233 my $class = $last->class;
1234 my $name = $last->name;
1235 $error = qq/Caught exception in $class->$name "$error"/;
1244 sub _stats_start_execute {
1245 my ( $c, $code ) = @_;
1247 return if ( ( $code->name =~ /^_.*/ )
1248 && ( !$c->config->{show_internal_actions} ) );
1250 $c->counter->{"$code"}++;
1252 my $action = "$code";
1253 $action = "/$action" unless $action =~ /->/;
1255 # determine if the call was the result of a forward
1256 # this is done by walking up the call stack and looking for a calling
1257 # sub of Catalyst::forward before the eval
1259 for my $index ( 2 .. 11 ) {
1261 if ( ( caller($index) )[0] eq 'Catalyst'
1262 && ( caller($index) )[3] eq '(eval)' );
1264 if ( ( caller($index) )[3] =~ /forward$/ ) {
1265 $callsub = ( caller($index) )[3];
1266 $action = "-> $action";
1271 my $uid = "$code" . $c->counter->{"$code"};
1273 # is this a root-level call or a forwarded call?
1274 if ( $callsub =~ /forward$/ ) {
1276 # forward, locate the caller
1277 if ( my $parent = $c->stack->[-1] ) {
1280 parent => "$parent" . $c->counter->{"$parent"},
1286 # forward with no caller may come from a plugin
1305 sub _stats_finish_execute {
1306 my ( $c, $info ) = @_;
1307 $c->stats->profile( end => $info );
1310 =head2 $c->_localize_fields( sub { }, \%keys );
1314 sub _localize_fields {
1315 my ( $c, $localized, $code ) = ( @_ );
1317 my $request = delete $localized->{request} || {};
1318 my $response = delete $localized->{response} || {};
1320 local @{ $c }{ keys %$localized } = values %$localized;
1321 local @{ $c->request }{ keys %$request } = values %$request;
1322 local @{ $c->response }{ keys %$response } = values %$response;
1329 Finalizes the request.
1336 for my $error ( @{ $c->error } ) {
1337 $c->log->error($error);
1340 # Allow engine to handle finalize flow (for POE)
1341 if ( $c->engine->can('finalize') ) {
1342 $c->engine->finalize($c);
1346 $c->finalize_uploads;
1349 if ( $#{ $c->error } >= 0 ) {
1353 $c->finalize_headers;
1356 if ( $c->request->method eq 'HEAD' ) {
1357 $c->response->body('');
1363 if ($c->use_stats) {
1364 my $elapsed = sprintf '%f', $c->stats->elapsed;
1365 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1367 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1370 return $c->response->status;
1373 =head2 $c->finalize_body
1379 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1381 =head2 $c->finalize_cookies
1387 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1389 =head2 $c->finalize_error
1395 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1397 =head2 $c->finalize_headers
1403 sub finalize_headers {
1406 # Check if we already finalized headers
1407 return if $c->response->{_finalized_headers};
1410 if ( my $location = $c->response->redirect ) {
1411 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1412 $c->response->header( Location => $location );
1414 if ( !$c->response->body ) {
1415 # Add a default body if none is already present
1417 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1423 if ( $c->response->body && !$c->response->content_length ) {
1425 # get the length from a filehandle
1426 if ( blessed( $c->response->body ) && $c->response->body->can('read') )
1428 my $stat = stat $c->response->body;
1429 if ( $stat && $stat->size > 0 ) {
1430 $c->response->content_length( $stat->size );
1433 $c->log->warn('Serving filehandle without a content-length');
1437 # everything should be bytes at this point, but just in case
1438 $c->response->content_length( bytes::length( $c->response->body ) );
1443 if ( $c->response->status =~ /^(1\d\d|[23]04)$/ ) {
1444 $c->response->headers->remove_header("Content-Length");
1445 $c->response->body('');
1448 $c->finalize_cookies;
1450 $c->engine->finalize_headers( $c, @_ );
1453 $c->response->{_finalized_headers} = 1;
1456 =head2 $c->finalize_output
1458 An alias for finalize_body.
1460 =head2 $c->finalize_read
1462 Finalizes the input after reading is complete.
1466 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1468 =head2 $c->finalize_uploads
1470 Finalizes uploads. Cleans up any temporary files.
1474 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1476 =head2 $c->get_action( $action, $namespace )
1478 Gets an action in a given namespace.
1482 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1484 =head2 $c->get_actions( $action, $namespace )
1486 Gets all actions of a given name in a namespace and all parent
1491 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1493 =head2 $c->handle_request( $class, @arguments )
1495 Called to handle each HTTP request.
1499 sub handle_request {
1500 my ( $class, @arguments ) = @_;
1502 # Always expect worst case!
1505 if ($class->debug) {
1506 my $secs = time - $START || 1;
1507 my $av = sprintf '%.3f', $COUNT / $secs;
1508 my $time = localtime time;
1509 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1512 my $c = $class->prepare(@arguments);
1514 $status = $c->finalize;
1517 if ( my $error = $@ ) {
1519 $class->log->error(qq/Caught exception in engine "$error"/);
1523 $class->log->_flush() if $class->log->can('_flush');
1527 =head2 $c->prepare( @arguments )
1529 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1535 my ( $class, @arguments ) = @_;
1537 $class->context_class( ref $class || $class ) unless $class->context_class;
1538 my $c = $class->context_class->new(
1542 request => $class->request_class->new(
1545 body_parameters => {},
1547 headers => HTTP::Headers->new,
1549 query_parameters => {},
1555 response => $class->response_class->new(
1559 headers => HTTP::Headers->new(),
1568 $c->stats($class->stats_class->new)->enable($c->use_stats);
1570 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1573 # For on-demand data
1574 $c->request->{_context} = $c;
1575 $c->response->{_context} = $c;
1576 weaken( $c->request->{_context} );
1577 weaken( $c->response->{_context} );
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_headers;
1586 $c->prepare_connection;
1587 $c->prepare_query_parameters;
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 $path = '/' unless length $path;
1604 my $address = $c->req->address || '';
1606 $c->log->debug(qq/"$method" request for "$path" from "$address"/)
1614 =head2 $c->prepare_action
1616 Prepares action. See L<Catalyst::Dispatcher>.
1620 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1622 =head2 $c->prepare_body
1624 Prepares message body.
1631 # Do we run for the first time?
1632 return if defined $c->request->{_body};
1634 # Initialize on-demand data
1635 $c->engine->prepare_body( $c, @_ );
1636 $c->prepare_parameters;
1637 $c->prepare_uploads;
1639 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1640 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1641 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1642 my $param = $c->req->body_parameters->{$key};
1643 my $value = defined($param) ? $param : '';
1645 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1647 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1651 =head2 $c->prepare_body_chunk( $chunk )
1653 Prepares a chunk of data before sending it to L<HTTP::Body>.
1655 See L<Catalyst::Engine>.
1659 sub prepare_body_chunk {
1661 $c->engine->prepare_body_chunk( $c, @_ );
1664 =head2 $c->prepare_body_parameters
1666 Prepares body parameters.
1670 sub prepare_body_parameters {
1672 $c->engine->prepare_body_parameters( $c, @_ );
1675 =head2 $c->prepare_connection
1677 Prepares connection.
1681 sub prepare_connection {
1683 $c->engine->prepare_connection( $c, @_ );
1686 =head2 $c->prepare_cookies
1692 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1694 =head2 $c->prepare_headers
1700 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1702 =head2 $c->prepare_parameters
1704 Prepares parameters.
1708 sub prepare_parameters {
1710 $c->prepare_body_parameters;
1711 $c->engine->prepare_parameters( $c, @_ );
1714 =head2 $c->prepare_path
1716 Prepares path and base.
1720 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
1722 =head2 $c->adjust_request_for_proxy
1724 Adjusts the request to account for a frontend proxy.
1728 sub adjust_request_for_proxy { my $c = shift; $c->engine->adjust_request_for_proxy( $c, @_ ) }
1730 =head2 $c->prepare_query_parameters
1732 Prepares query parameters.
1736 sub prepare_query_parameters {
1739 $c->engine->prepare_query_parameters( $c, @_ );
1741 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
1742 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1743 for my $key ( sort keys %{ $c->req->query_parameters } ) {
1744 my $param = $c->req->query_parameters->{$key};
1745 my $value = defined($param) ? $param : '';
1747 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1749 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1753 =head2 $c->prepare_read
1755 Prepares the input for reading.
1759 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1761 =head2 $c->prepare_request
1763 Prepares the engine request.
1767 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1769 =head2 $c->prepare_uploads
1775 sub prepare_uploads {
1778 $c->engine->prepare_uploads( $c, @_ );
1780 if ( $c->debug && keys %{ $c->request->uploads } ) {
1781 my $t = Text::SimpleTable->new(
1782 [ 12, 'Parameter' ],
1787 for my $key ( sort keys %{ $c->request->uploads } ) {
1788 my $upload = $c->request->uploads->{$key};
1789 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1790 $t->row( $key, $u->filename, $u->type, $u->size );
1793 $c->log->debug( "File Uploads are:\n" . $t->draw );
1797 =head2 $c->prepare_write
1799 Prepares the output for writing.
1803 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1805 =head2 $c->request_class
1807 Returns or sets the request class.
1809 =head2 $c->response_class
1811 Returns or sets the response class.
1813 =head2 $c->read( [$maxlength] )
1815 Reads a chunk of data from the request body. This method is designed to
1816 be used in a while loop, reading C<$maxlength> bytes on every call.
1817 C<$maxlength> defaults to the size of the request if not specified.
1819 You have to set C<< MyApp->config->{parse_on_demand} >> to use this
1822 Warning: If you use read(), Catalyst will not process the body,
1823 so you will not be able to access POST parameters or file uploads via
1824 $c->request. You must handle all body parsing yourself.
1828 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1836 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1838 =head2 $c->set_action( $action, $code, $namespace, $attrs )
1840 Sets an action in a given namespace.
1844 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1846 =head2 $c->setup_actions($component)
1848 Sets up actions for a component.
1852 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1854 =head2 $c->setup_components
1856 Sets up components. Specify a C<setup_components> config option to pass
1857 additional options directly to L<Module::Pluggable>. To add additional
1858 search paths, specify a key named C<search_extra> as an array
1859 reference. Items in the array beginning with C<::> will have the
1860 application class name prepended to them.
1864 sub setup_components {
1867 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
1868 my $config = $class->config->{ setup_components };
1869 my $extra = delete $config->{ search_extra } || [];
1871 push @paths, @$extra;
1873 my $locator = Module::Pluggable::Object->new(
1874 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
1878 my @comps = sort { length $a <=> length $b } $locator->plugins;
1879 my %comps = map { $_ => 1 } @comps;
1881 for my $component ( @comps ) {
1883 # We pass ignore_loaded here so that overlay files for (e.g.)
1884 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
1885 # we know M::P::O found a file on disk so this is safe
1887 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
1889 my $module = $class->setup_component( $component );
1891 $component => $module,
1893 $_ => $class->setup_component( $_ )
1895 not exists $comps{$_}
1896 } Devel::InnerPackage::list_packages( $component )
1899 for my $key ( keys %modules ) {
1900 $class->components->{ $key } = $modules{ $key };
1905 =head2 $c->setup_component
1909 sub setup_component {
1910 my( $class, $component ) = @_;
1912 unless ( $component->can( 'COMPONENT' ) ) {
1916 my $suffix = Catalyst::Utils::class2classsuffix( $component );
1917 my $config = $class->config->{ $suffix } || {};
1919 my $instance = eval { $component->COMPONENT( $class, $config ); };
1921 if ( my $error = $@ ) {
1923 Catalyst::Exception->throw(
1924 message => qq/Couldn't instantiate component "$component", "$error"/
1928 Catalyst::Exception->throw(
1930 qq/Couldn't instantiate component "$component", "COMPONENT() didn't return an object-like value"/
1931 ) unless eval { $instance->can( 'can' ) };
1936 =head2 $c->setup_dispatcher
1942 sub setup_dispatcher {
1943 my ( $class, $dispatcher ) = @_;
1946 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1949 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
1950 $dispatcher = 'Catalyst::Dispatcher::' . $env;
1953 unless ($dispatcher) {
1954 $dispatcher = $class->dispatcher_class;
1957 unless (Class::Inspector->loaded($dispatcher)) {
1958 require Class::Inspector->filename($dispatcher);
1961 # dispatcher instance
1962 $class->dispatcher( $dispatcher->new );
1965 =head2 $c->setup_engine
1972 my ( $class, $engine ) = @_;
1975 $engine = 'Catalyst::Engine::' . $engine;
1978 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
1979 $engine = 'Catalyst::Engine::' . $env;
1982 if ( $ENV{MOD_PERL} ) {
1984 # create the apache method
1987 *{"$class\::apache"} = sub { shift->engine->apache };
1990 my ( $software, $version ) =
1991 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
1994 $version =~ s/(\.[^.]+)\./$1/g;
1996 if ( $software eq 'mod_perl' ) {
2000 if ( $version >= 1.99922 ) {
2001 $engine = 'Catalyst::Engine::Apache2::MP20';
2004 elsif ( $version >= 1.9901 ) {
2005 $engine = 'Catalyst::Engine::Apache2::MP19';
2008 elsif ( $version >= 1.24 ) {
2009 $engine = 'Catalyst::Engine::Apache::MP13';
2013 Catalyst::Exception->throw( message =>
2014 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2019 # install the correct mod_perl handler
2020 if ( $version >= 1.9901 ) {
2021 *handler = sub : method {
2022 shift->handle_request(@_);
2026 *handler = sub ($$) { shift->handle_request(@_) };
2031 elsif ( $software eq 'Zeus-Perl' ) {
2032 $engine = 'Catalyst::Engine::Zeus';
2036 Catalyst::Exception->throw(
2037 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2042 $engine = $class->engine_class;
2045 unless (Class::Inspector->loaded($engine)) {
2046 require Class::Inspector->filename($engine);
2049 # check for old engines that are no longer compatible
2051 if ( $engine->isa('Catalyst::Engine::Apache')
2052 && !Catalyst::Engine::Apache->VERSION )
2057 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2058 && Catalyst::Engine::Server->VERSION le '0.02' )
2063 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2064 && $engine->VERSION eq '0.01' )
2069 elsif ($engine->isa('Catalyst::Engine::Zeus')
2070 && $engine->VERSION eq '0.01' )
2076 Catalyst::Exception->throw( message =>
2077 qq/Engine "$engine" is not supported by this version of Catalyst/
2082 $class->engine( $engine->new );
2085 =head2 $c->setup_home
2087 Sets up the home directory.
2092 my ( $class, $home ) = @_;
2094 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2099 $home = Catalyst::Utils::home($class);
2103 $class->config->{home} ||= $home;
2104 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2108 =head2 $c->setup_log
2115 my ( $class, $debug ) = @_;
2117 unless ( $class->log ) {
2118 $class->log( Catalyst::Log->new );
2121 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2122 if ( defined($env_debug) ? $env_debug : $debug ) {
2124 *{"$class\::debug"} = sub { 1 };
2125 $class->log->debug('Debug messages enabled');
2129 =head2 $c->setup_plugins
2135 =head2 $c->setup_stats
2137 Sets up timing statistics class.
2142 my ( $class, $stats ) = @_;
2144 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2146 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2147 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2149 *{"$class\::use_stats"} = sub { 1 };
2150 $class->log->debug('Statistics enabled');
2155 =head2 $c->registered_plugins
2157 Returns a sorted list of the plugins which have either been stated in the
2158 import list or which have been added via C<< MyApp->plugin(@args); >>.
2160 If passed a given plugin name, it will report a boolean value indicating
2161 whether or not that plugin is loaded. A fully qualified name is required if
2162 the plugin name does not begin with C<Catalyst::Plugin::>.
2164 if ($c->registered_plugins('Some::Plugin')) {
2172 sub registered_plugins {
2174 return sort keys %{ $proto->_plugins } unless @_;
2176 return 1 if exists $proto->_plugins->{$plugin};
2177 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2180 sub _register_plugin {
2181 my ( $proto, $plugin, $instant ) = @_;
2182 my $class = ref $proto || $proto;
2184 # no ignore_loaded here, the plugin may already have been
2185 # defined in memory and we don't want to error on "no file" if so
2187 Catalyst::Utils::ensure_class_loaded( $plugin );
2189 $proto->_plugins->{$plugin} = 1;
2192 unshift @{"$class\::ISA"}, $plugin;
2198 my ( $class, $plugins ) = @_;
2200 $class->_plugins( {} ) unless $class->_plugins;
2202 for my $plugin ( reverse @$plugins ) {
2204 unless ( $plugin =~ s/\A\+// ) {
2205 $plugin = "Catalyst::Plugin::$plugin";
2208 $class->_register_plugin($plugin);
2215 Returns an arrayref of the internal execution stack (actions that are
2216 currently executing).
2218 =head2 $c->stats_class
2220 Returns or sets the stats (timing statistics) class.
2222 =head2 $c->use_stats
2224 Returns 1 when stats collection is enabled. Stats collection is enabled
2225 when the -Stats options is set, debug is on or when the <MYAPP>_STATS
2226 environment variable is set.
2228 Note that this is a static method, not an accessor and should be overloaded
2229 by declaring "sub use_stats { 1 }" in your MyApp.pm, not by calling $c->use_stats(1).
2236 =head2 $c->write( $data )
2238 Writes $data to the output stream. When using this method directly, you
2239 will need to manually set the C<Content-Length> header to the length of
2240 your output data, if known.
2247 # Finalize headers if someone manually writes output
2248 $c->finalize_headers;
2250 return $c->engine->write( $c, @_ );
2255 Returns the Catalyst version number. Mostly useful for "powered by"
2256 messages in template systems.
2260 sub version { return $Catalyst::VERSION }
2262 =head1 INTERNAL ACTIONS
2264 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2265 C<_ACTION>, and C<_END>. These are by default not shown in the private
2266 action table, but you can make them visible with a config parameter.
2268 MyApp->config->{show_internal_actions} = 1;
2270 =head1 CASE SENSITIVITY
2272 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> is
2273 mapped to C</foo/bar>. You can activate case sensitivity with a config
2276 MyApp->config->{case_sensitive} = 1;
2278 This causes C<MyApp::C::Foo::Bar> to map to C</Foo/Bar>.
2280 =head1 ON-DEMAND PARSER
2282 The request body is usually parsed at the beginning of a request,
2283 but if you want to handle input yourself, you can enable on-demand
2284 parsing with a config parameter.
2286 MyApp->config->{parse_on_demand} = 1;
2288 =head1 PROXY SUPPORT
2290 Many production servers operate using the common double-server approach,
2291 with a lightweight frontend web server passing requests to a larger
2292 backend server. An application running on the backend server must deal
2293 with two problems: the remote user always appears to be C<127.0.0.1> and
2294 the server's hostname will appear to be C<localhost> regardless of the
2295 virtual host that the user connected through.
2297 Catalyst will automatically detect this situation when you are running
2298 the frontend and backend servers on the same machine. The following
2299 changes are made to the request.
2303 =item * X-Forwarded-For
2305 The IP address in C<< $c->req->address >> is set to the user's real IP
2306 address, as read from the X-Forwarded-For header.
2308 =item * X-Forwarded-Host
2310 The host value for C<< $c->req->base >> and C<< $c->req->uri >> is set
2311 to the real host, as read from the X-Forwarded-Host header. The value
2312 of C<< $c->req->hostname >> is also adjusted accordingly.
2314 =item * X-Forwarded-Port
2316 The port value for C<< $c->req->base >> and C<< $c->req->uri >> is set
2317 to the real port, as read from the X-Forwarded-Port header.
2319 =item * X-Forwarded-Path
2321 If this is set, the value of the X-Forwarded-Path header is
2322 I<prepended> to the path value of C<< $c->req->base >> and C<<
2325 =item * X-Forwarded-Is-SSL
2327 If this is set, the scheme value of C<< $c->req->base >> and C<<
2328 $c->req->uri >> is set to "https". Additional, C<< $c->req->protocol
2329 >> is also set to "https", and C<< $c->req->secure >> is set to a true
2334 Obviously, your web server must support these headers for this to work.
2336 In a more complex server farm environment where you may have your
2337 frontend proxy server(s) on different machines, you will need to set a
2338 configuration option to tell Catalyst to read the proxied data from the
2341 MyApp->config->{using_frontend_proxy} = 1;
2343 If you do not wish to use the proxy support at all, you may set:
2345 MyApp->config->{ignore_frontend_proxy} = 1;
2347 =head1 THREAD SAFETY
2349 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2350 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2351 believe the Catalyst core to be thread-safe.
2353 If you plan to operate in a threaded environment, remember that all other
2354 modules you are using must also be thread-safe. Some modules, most notably
2355 L<DBD::SQLite>, are not thread-safe.
2361 Join #catalyst on irc.perl.org.
2365 http://lists.rawmode.org/mailman/listinfo/catalyst
2366 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
2370 http://catalyst.perl.org
2374 http://dev.catalyst.perl.org
2378 =head2 L<Task::Catalyst> - All you need to start with Catalyst
2380 =head2 L<Catalyst::Manual> - The Catalyst Manual
2382 =head2 L<Catalyst::Component>, L<Catalyst::Base> - Base classes for components
2384 =head2 L<Catalyst::Engine> - Core engine
2386 =head2 L<Catalyst::Log> - Log class.
2388 =head2 L<Catalyst::Request> - Request object
2390 =head2 L<Catalyst::Response> - Response object
2392 =head2 L<Catalyst::Test> - The test suite.
2466 Sebastian Riedel, C<sri@oook.de>
2470 This library is free software, you can redistribute it and/or modify it under
2471 the same terms as Perl itself.