6 extends 'Catalyst::Component';
8 use Catalyst::Exception;
10 use Catalyst::Request;
11 use Catalyst::Request::Upload;
12 use Catalyst::Response;
14 use Catalyst::Controller;
15 use Devel::InnerPackage ();
17 use Module::Pluggable::Object ();
18 use Text::SimpleTable ();
19 use Path::Class::Dir ();
20 use Path::Class::File ();
21 use Time::HiRes qw/gettimeofday tv_interval/;
25 use Scalar::Util qw/weaken blessed/;
26 use Tree::Simple qw/use_weak_refs/;
27 use Tree::Simple::Visitor::FindByUID;
30 use Carp qw/croak carp/;
32 BEGIN { require 5.008001; }
34 has stack => (is => 'rw', default => sub { [] });
35 has stash => (is => 'rw', default => sub { {} });
36 has state => (is => 'rw', default => 0);
37 has stats => (is => 'rw');
38 has action => (is => 'rw');
39 has counter => (is => 'rw', default => sub { {} });
40 has request => (is => 'rw', default => sub { $_[0]->request_class->new({}) }, required => 1, lazy => 1);
41 has response => (is => 'rw', default => sub { $_[0]->response_class->new({}) }, required => 1, lazy => 1);
42 has namespace => (is => 'rw');
46 attributes->import( __PACKAGE__, \&namespace, 'lvalue' );
48 sub depth { scalar @{ shift->stack || [] }; }
49 sub comp { shift->component(@_) }
52 # carp "the use of req() is deprecated in favour of request()";
53 my $self = shift; return $self->request(@_);
56 # carp "the use of res() is deprecated in favour of response()";
57 my $self = shift; return $self->response(@_);
60 # For backwards compatibility
61 sub finalize_output { shift->finalize_body(@_) };
66 our $RECURSION = 1000;
67 our $DETACH = "catalyst_detach\n";
69 #I imagine that very few of these really need to be class variables. if any.
70 #maybe we should just make them attributes with a default?
71 __PACKAGE__->mk_classdata($_)
72 for qw/components arguments dispatcher engine log dispatcher_class
73 engine_class context_class request_class response_class stats_class
76 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
77 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
78 __PACKAGE__->request_class('Catalyst::Request');
79 __PACKAGE__->response_class('Catalyst::Response');
80 __PACKAGE__->stats_class('Catalyst::Stats');
82 # Remember to update this in Catalyst::Runtime as well!
84 our $VERSION = '5.7013';
87 my ( $class, @arguments ) = @_;
89 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
91 return unless $class eq 'Catalyst';
93 my $caller = caller();
94 return if $caller eq 'main';
95 my $meta = Moose::Meta::Class->initialize($caller);
96 #Moose->import({ into => $caller }); #do we want to do this?
98 unless ( $caller->isa('Catalyst') ) {
99 my @superclasses = ($meta->superclasses, $class, 'Catalyst::Controller');
100 $meta->superclasses(@superclasses);
102 unless( $meta->has_method('meta') ){
103 $meta->add_method(meta => sub { Moose::Meta::Class->initialize("${caller}") } );
106 $caller->arguments( [@arguments] );
112 Catalyst - The Elegant MVC Web Application Framework
116 See the L<Catalyst::Manual> distribution for comprehensive
117 documentation and tutorials.
119 # Install Catalyst::Devel for helpers and other development tools
120 # use the helper to create a new application
123 # add models, views, controllers
124 script/myapp_create.pl model MyDatabase DBIC::Schema create=dynamic dbi:SQLite:/path/to/db
125 script/myapp_create.pl view MyTemplate TT
126 script/myapp_create.pl controller Search
128 # built in testserver -- use -r to restart automatically on changes
129 # --help to see all available options
130 script/myapp_server.pl
132 # command line testing interface
133 script/myapp_test.pl /yada
136 use Catalyst qw/-Debug/; # include plugins here as well
138 ### In lib/MyApp/Controller/Root.pm (autocreated)
139 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
140 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
141 $c->stash->{template} = 'foo.tt'; # set the template
142 # lookup something from db -- stash vars are passed to TT
144 $c->model('Database::Foo')->search( { country => $args[0] } );
145 if ( $c->req->params->{bar} ) { # access GET or POST parameters
146 $c->forward( 'bar' ); # process another action
147 # do something else after forward returns
151 # The foo.tt TT template can use the stash data from the database
152 [% WHILE (item = data.next) %]
156 # called for /bar/of/soap, /bar/of/soap/10, etc.
157 sub bar : Path('/bar/of/soap') { ... }
159 # called for all actions, from the top-most controller downwards
161 my ( $self, $c ) = @_;
162 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
163 $c->res->redirect( '/login' ); # require login
164 return 0; # abort request and go immediately to end()
166 return 1; # success; carry on to next action
169 # called after all actions are finished
171 my ( $self, $c ) = @_;
172 if ( scalar @{ $c->error } ) { ... } # handle errors
173 return if $c->res->body; # already have a response
174 $c->forward( 'MyApp::View::TT' ); # render template
177 ### in MyApp/Controller/Foo.pm
178 # called for /foo/bar
179 sub bar : Local { ... }
181 # called for /blargle
182 sub blargle : Global { ... }
184 # an index action matches /foo, but not /foo/1, etc.
185 sub index : Private { ... }
187 ### in MyApp/Controller/Foo/Bar.pm
188 # called for /foo/bar/baz
189 sub baz : Local { ... }
191 # first Root auto is called, then Foo auto, then this
192 sub auto : Private { ... }
194 # powerful regular expression paths are also possible
195 sub details : Regex('^product/(\w+)/details$') {
196 my ( $self, $c ) = @_;
197 # extract the (\w+) from the URI
198 my $product = $c->req->captures->[0];
201 See L<Catalyst::Manual::Intro> for additional information.
205 Catalyst is a modern framework for making web applications without the
206 pain usually associated with this process. This document is a reference
207 to the main Catalyst application. If you are a new user, we suggest you
208 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
210 See L<Catalyst::Manual> for more documentation.
212 Catalyst plugins can be loaded by naming them as arguments to the "use
213 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
214 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
217 use Catalyst qw/My::Module/;
219 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
220 fully qualify the name by using a unary plus:
224 +Fully::Qualified::Plugin::Name
227 Special flags like C<-Debug> and C<-Engine> can also be specified as
228 arguments when Catalyst is loaded:
230 use Catalyst qw/-Debug My::Module/;
232 The position of plugins and flags in the chain is important, because
233 they are loaded in the order in which they appear.
235 The following flags are supported:
239 Enables debug output. You can also force this setting from the system
240 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
241 settings override the application, with <MYAPP>_DEBUG having the highest
246 Forces Catalyst to use a specific engine. Omit the
247 C<Catalyst::Engine::> prefix of the engine name, i.e.:
249 use Catalyst qw/-Engine=CGI/;
253 Forces Catalyst to use a specific home directory, e.g.:
255 use Catalyst qw[-Home=/usr/mst];
257 This can also be done in the shell environment by setting either the
258 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
259 is replaced with the uppercased name of your application, any "::" in
260 the name will be replaced with underscores, e.g. MyApp::Web should use
261 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
269 Enables statistics collection and reporting. You can also force this setting
270 from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
271 environment settings override the application, with <MYAPP>_STATS having the
276 use Catalyst qw/-Stats=1/
280 =head2 INFORMATION ABOUT THE CURRENT REQUEST
284 Returns a L<Catalyst::Action> object for the current action, which
285 stringifies to the action name. See L<Catalyst::Action>.
289 Returns the namespace of the current action, i.e., the URI prefix
290 corresponding to the controller of the current action. For example:
292 # in Controller::Foo::Bar
293 $c->namespace; # returns 'foo/bar';
299 Returns the current L<Catalyst::Request> object, giving access to
300 information about the current client request (including parameters,
301 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
303 =head2 REQUEST FLOW HANDLING
305 =head2 $c->forward( $action [, \@arguments ] )
307 =head2 $c->forward( $class, $method, [, \@arguments ] )
309 Forwards processing to another action, by its private name. If you give a
310 class name but no method, C<process()> is called. You may also optionally
311 pass arguments in an arrayref. The action will receive the arguments in
312 C<@_> and C<< $c->req->args >>. Upon returning from the function,
313 C<< $c->req->args >> will be restored to the previous values.
315 Any data C<return>ed from the action forwarded to, will be returned by the
318 my $foodata = $c->forward('/foo');
319 $c->forward('index');
320 $c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/);
321 $c->forward('MyApp::View::TT');
323 Note that forward implies an C<<eval { }>> around the call (actually
324 C<execute> does), thus de-fatalizing all 'dies' within the called
325 action. If you want C<die> to propagate you need to do something like:
328 die $c->error if $c->error;
330 Or make sure to always return true values from your actions and write
333 $c->forward('foo') || return;
337 sub forward { my $c = shift; no warnings 'recursion'; $c->dispatcher->forward( $c, @_ ) }
339 =head2 $c->detach( $action [, \@arguments ] )
341 =head2 $c->detach( $class, $method, [, \@arguments ] )
345 The same as C<forward>, but doesn't return to the previous action when
346 processing is finished.
348 When called with no arguments it escapes the processing chain entirely.
352 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
358 Returns the current L<Catalyst::Response> object, see there for details.
362 Returns a hashref to the stash, which may be used to store data and pass
363 it between components during a request. You can also set hash keys by
364 passing arguments. The stash is automatically sent to the view. The
365 stash is cleared at the end of a request; it cannot be used for
366 persistent storage (for this you must use a session; see
367 L<Catalyst::Plugin::Session> for a complete system integrated with
370 $c->stash->{foo} = $bar;
371 $c->stash( { moose => 'majestic', qux => 0 } );
372 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
374 # stash is automatically passed to the view for use in a template
375 $c->forward( 'MyApp::View::TT' );
382 my $stash = @_ > 1 ? {@_} : $_[0];
383 croak('stash takes a hash or hashref') unless ref $stash;
384 foreach my $key ( keys %$stash ) {
385 #shouldn't we hold this in a var and save ourselves the subcall?
386 $c->next::method->{$key} = $stash->{$key};
390 return $c->next::method;
396 =head2 $c->error($error, ...)
398 =head2 $c->error($arrayref)
400 Returns an arrayref containing error messages. If Catalyst encounters an
401 error while processing a request, it stores the error in $c->error. This
402 method should only be used to store fatal error messages.
404 my @error = @{ $c->error };
408 $c->error('Something bad happened');
415 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
416 croak @$error unless ref $c;
417 push @{ $c->{error} }, @$error;
419 elsif ( defined $_[0] ) { $c->{error} = undef }
420 return $c->{error} || [];
426 Contains the return value of the last executed action.
428 =head2 $c->clear_errors
430 Clear errors. You probably don't want to clear the errors unless you are
431 implementing a custom error screen.
433 This is equivalent to running
447 my ( $c, @names ) = @_;
449 foreach my $name (@names) {
450 foreach my $component ( keys %{ $c->components } ) {
451 return $c->components->{$component} if $component =~ /$name/i;
458 # try explicit component names
460 my ( $c, @names ) = @_;
462 foreach my $try (@names) {
463 return $c->components->{$try} if ( exists $c->components->{$try} );
469 # like component, but try just these prefixes before regex searching,
470 # and do not try to return "sort keys %{ $c->components }"
472 my ( $c, $name, @prefixes ) = @_;
474 my $appclass = ref $c || $c;
476 my @names = map { "${appclass}::${_}::${name}" } @prefixes;
478 my $comp = $c->_comp_explicit(@names);
479 return $comp if defined($comp);
480 $comp = $c->_comp_search($name);
484 # Find possible names for a prefix
487 my ( $c, @prefixes ) = @_;
489 my $appclass = ref $c || $c;
491 my @pre = map { "${appclass}::${_}::" } @prefixes;
495 COMPONENT: foreach my $comp ($c->component) {
496 foreach my $p (@pre) {
497 if ($comp =~ s/^$p//) {
507 # Return a component if only one matches.
509 my ( $c, @prefixes ) = @_;
511 my $appclass = ref $c || $c;
513 my ( $comp, $rest ) =
514 map { $c->_comp_search("^${appclass}::${_}::") } @prefixes;
515 return $comp unless $rest;
518 # Filter a component before returning by calling ACCEPT_CONTEXT if available
519 sub _filter_component {
520 my ( $c, $comp, @args ) = @_;
521 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
522 return $comp->ACCEPT_CONTEXT( $c, @args );
524 else { return $comp }
527 =head2 COMPONENT ACCESSORS
529 =head2 $c->controller($name)
531 Gets a L<Catalyst::Controller> instance by name.
533 $c->controller('Foo')->do_stuff;
535 If the name is omitted, will return the controller for the dispatched
541 my ( $c, $name, @args ) = @_;
542 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Controller C/ ),
545 return $c->component( $c->action->class );
548 =head2 $c->model($name)
550 Gets a L<Catalyst::Model> instance by name.
552 $c->model('Foo')->do_stuff;
554 Any extra arguments are directly passed to ACCEPT_CONTEXT.
556 If the name is omitted, it will look for
557 - a model object in $c->stash{current_model_instance}, then
558 - a model name in $c->stash->{current_model}, then
559 - a config setting 'default_model', or
560 - check if there is only one model, and return it if that's the case.
565 my ( $c, $name, @args ) = @_;
566 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Model M/ ),
570 return $c->stash->{current_model_instance}
571 if $c->stash->{current_model_instance};
572 return $c->model( $c->stash->{current_model} )
573 if $c->stash->{current_model};
575 return $c->model( $c->config->{default_model} )
576 if $c->config->{default_model};
577 return $c->_filter_component( $c->_comp_singular(qw/Model M/) );
581 =head2 $c->controllers
583 Returns the available names which can be passed to $c->controller
589 return $c->_comp_names(qw/Controller C/);
593 =head2 $c->view($name)
595 Gets a L<Catalyst::View> instance by name.
597 $c->view('Foo')->do_stuff;
599 Any extra arguments are directly passed to ACCEPT_CONTEXT.
601 If the name is omitted, it will look for
602 - a view object in $c->stash{current_view_instance}, then
603 - a view name in $c->stash->{current_view}, then
604 - a config setting 'default_view', or
605 - check if there is only one view, and return it if that's the case.
610 my ( $c, $name, @args ) = @_;
611 return $c->_filter_component( $c->_comp_prefixes( $name, qw/View V/ ),
615 return $c->stash->{current_view_instance}
616 if $c->stash->{current_view_instance};
617 return $c->view( $c->stash->{current_view} )
618 if $c->stash->{current_view};
620 return $c->view( $c->config->{default_view} )
621 if $c->config->{default_view};
622 return $c->_filter_component( $c->_comp_singular(qw/View V/) );
627 Returns the available names which can be passed to $c->model
633 return $c->_comp_names(qw/Model M/);
639 Returns the available names which can be passed to $c->view
645 return $c->_comp_names(qw/View V/);
648 =head2 $c->comp($name)
650 =head2 $c->component($name)
652 Gets a component object by name. This method is not recommended,
653 unless you want to get a specific component by full
654 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
655 should be used instead.
666 my $appclass = ref $c || $c;
669 $name, "${appclass}::${name}",
670 map { "${appclass}::${_}::${name}" }
671 qw/Model M Controller C View V/
674 my $comp = $c->_comp_explicit(@names);
675 return $c->_filter_component( $comp, @_ ) if defined($comp);
677 $comp = $c->_comp_search($name);
678 return $c->_filter_component( $comp, @_ ) if defined($comp);
681 return sort keys %{ $c->components };
686 =head2 CLASS DATA AND HELPER CLASSES
690 Returns or takes a hashref containing the application's configuration.
692 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
694 You can also use a C<YAML>, C<XML> or C<Config::General> config file
695 like myapp.yml in your applications home directory. See
696 L<Catalyst::Plugin::ConfigLoader>.
699 db: dsn:SQLite:foo.db
707 $c->log->warn("Setting config after setup has been run is not a good idea.")
708 if ( @_ and $c->setup_finished );
710 $c->next::method(@_);
715 Returns the logging object instance. Unless it is already set, Catalyst
716 sets this up with a L<Catalyst::Log> object. To use your own log class,
717 set the logger with the C<< __PACKAGE__->log >> method prior to calling
718 C<< __PACKAGE__->setup >>.
720 __PACKAGE__->log( MyLogger->new );
725 $c->log->info( 'Now logging with my own logger!' );
727 Your log class should implement the methods described in
733 Overload to enable debug messages (same as -Debug option).
735 Note that this is a static method, not an accessor and should be overloaded
736 by declaring "sub debug { 1 }" in your MyApp.pm, not by calling $c->debug(1).
742 =head2 $c->dispatcher
744 Returns the dispatcher instance. Stringifies to class name. See
745 L<Catalyst::Dispatcher>.
749 Returns the engine instance. Stringifies to the class name. See
753 =head2 UTILITY METHODS
755 =head2 $c->path_to(@path)
757 Merges C<@path> with C<< $c->config->{home} >> and returns a
758 L<Path::Class::Dir> object.
762 $c->path_to( 'db', 'sqlite.db' );
767 my ( $c, @path ) = @_;
768 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
769 if ( -d $path ) { return $path }
770 else { return Path::Class::File->new( $c->config->{home}, @path ) }
773 =head2 $c->plugin( $name, $class, @args )
775 Helper method for plugins. It creates a classdata accessor/mutator and
776 loads and instantiates the given class.
778 MyApp->plugin( 'prototype', 'HTML::Prototype' );
780 $c->prototype->define_javascript_functions;
785 my ( $class, $name, $plugin, @args ) = @_;
786 $class->_register_plugin( $plugin, 1 );
788 eval { $plugin->import };
789 $class->mk_classdata($name);
791 eval { $obj = $plugin->new(@args) };
794 Catalyst::Exception->throw( message =>
795 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
799 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
805 Initializes the dispatcher and engine, loads any plugins, and loads the
806 model, view, and controller components. You may also specify an array
807 of plugins to load here, if you choose to not load them in the C<use
811 MyApp->setup( qw/-Debug/ );
816 my ( $class, @arguments ) = @_;
817 Class::C3::initialize;
818 $class->log->warn("Running setup twice is not a good idea.")
819 if ( $class->setup_finished );
821 unless ( $class->isa('Catalyst') ) {
823 Catalyst::Exception->throw(
824 message => qq/'$class' does not inherit from Catalyst/ );
827 if ( $class->arguments ) {
828 @arguments = ( @arguments, @{ $class->arguments } );
834 foreach (@arguments) {
838 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
840 elsif (/^-(\w+)=?(.*)$/) {
841 $flags->{ lc $1 } = $2;
844 push @{ $flags->{plugins} }, $_;
848 $class->setup_home( delete $flags->{home} );
850 $class->setup_log( delete $flags->{log} );
851 $class->setup_plugins( delete $flags->{plugins} );
852 $class->setup_dispatcher( delete $flags->{dispatcher} );
853 $class->setup_engine( delete $flags->{engine} );
854 $class->setup_stats( delete $flags->{stats} );
856 for my $flag ( sort keys %{$flags} ) {
858 if ( my $code = $class->can( 'setup_' . $flag ) ) {
859 &$code( $class, delete $flags->{$flag} );
862 $class->log->warn(qq/Unknown flag "$flag"/);
866 eval { require Catalyst::Devel; };
867 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
868 $class->log->warn(<<"EOF");
869 You are running an old script!
871 Please update by running (this will overwrite existing files):
872 catalyst.pl -force -scripts $class
874 or (this will not overwrite existing files):
875 catalyst.pl -scripts $class
880 if ( $class->debug ) {
881 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
884 my $t = Text::SimpleTable->new(74);
885 $t->row($_) for @plugins;
886 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
889 my $dispatcher = $class->dispatcher;
890 my $engine = $class->engine;
891 my $home = $class->config->{home};
893 $class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
894 $class->log->debug(qq/Loaded engine "$engine"/);
898 ? $class->log->debug(qq/Found home "$home"/)
899 : $class->log->debug(qq/Home "$home" doesn't exist/)
900 : $class->log->debug(q/Couldn't find home/);
905 no warnings qw/redefine/;
906 local *setup = sub { };
910 # Initialize our data structure
911 $class->components( {} );
913 $class->setup_components;
915 if ( $class->debug ) {
916 my $t = Text::SimpleTable->new( [ 63, 'Class' ], [ 8, 'Type' ] );
917 for my $comp ( sort keys %{ $class->components } ) {
918 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
919 $t->row( $comp, $type );
921 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
922 if ( keys %{ $class->components } );
925 # Add our self to components, since we are also a component
926 if( $class->isa('Catalyst::Controller') ){
927 $class->components->{$class} = $class;
930 $class->setup_actions;
932 if ( $class->debug ) {
933 my $name = $class->config->{name} || 'Application';
934 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
936 $class->log->_flush() if $class->log->can('_flush');
938 $class->setup_finished(1);
939 Class::C3::initialize;
942 =head2 $c->uri_for( $path, @args?, \%query_values? )
944 Merges path with C<< $c->request->base >> for absolute URIs and with
945 C<< $c->namespace >> for relative URIs, then returns a normalized L<URI>
946 object. If any args are passed, they are added at the end of the path.
947 If the last argument to C<uri_for> is a hash reference, it is assumed to
948 contain GET parameter key/value pairs, which will be appended to the URI
951 Note that uri_for is destructive to the passed hashref. Subsequent calls
952 with the same hashref may have unintended results.
954 Instead of C<$path>, you can also optionally pass a C<$action> object
955 which will be resolved to a path using
956 C<< $c->dispatcher->uri_for_action >>; if the first element of
957 C<@args> is an arrayref it is treated as a list of captures to be passed
958 to C<uri_for_action>.
963 my ( $c, $path, @args ) = @_;
965 if ( Scalar::Util::blessed($path) ) { # action object
966 my $captures = ( scalar @args && ref $args[0] eq 'ARRAY'
969 $path = $c->dispatcher->uri_for_action($path, $captures);
970 return undef unless defined($path);
971 $path = '/' if $path eq '';
974 undef($path) if (defined $path && $path eq '');
977 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
979 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
980 s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
982 unshift(@args, $path);
984 unless (defined $path && $path =~ s!^/!!) { # in-place strip
985 my $namespace = $c->namespace;
986 if (defined $path) { # cheesy hack to handle path '../foo'
987 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
989 unshift(@args, $namespace || '');
992 # join args with '/', or a blank string
993 my $args = join('/', grep { defined($_) } @args);
994 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
996 my $base = $c->req->base;
997 my $class = ref($base);
998 $base =~ s{(?<!/)$}{/};
1002 if (my @keys = keys %$params) {
1003 # somewhat lifted from URI::_query's query_form
1004 $query = '?'.join('&', map {
1005 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
1008 my $val = $params->{$_};
1009 $val = '' unless defined $val;
1012 utf8::encode( $_ ) if utf8::is_utf8($_);
1013 # using the URI::Escape pattern here so utf8 chars survive
1014 s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1016 "${key}=$_"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1020 my $res = bless(\"${base}${args}${query}", $class);
1024 =head2 $c->welcome_message
1026 Returns the Catalyst welcome HTML page.
1030 sub welcome_message {
1032 my $name = $c->config->{name};
1033 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1034 my $prefix = Catalyst::Utils::appprefix( ref $c );
1035 $c->response->content_type('text/html; charset=utf-8');
1037 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1038 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1039 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1041 <meta http-equiv="Content-Language" content="en" />
1042 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1043 <title>$name on Catalyst $VERSION</title>
1044 <style type="text/css">
1047 background-color: #eee;
1054 margin-bottom: 10px;
1056 background-color: #ccc;
1057 border: 1px solid #aaa;
1062 font-family: verdana, tahoma, sans-serif;
1065 font-family: verdana, tahoma, sans-serif;
1068 text-decoration: none;
1070 border-bottom: 1px dotted #bbb;
1072 :link:hover, :visited:hover {
1085 background-color: #fff;
1086 border: 1px solid #aaa;
1090 font-weight: normal;
1112 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1117 <img src="$logo" alt="Catalyst Logo" />
1119 <p>Welcome to the world of Catalyst.
1120 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1121 framework will make web development something you had
1122 never expected it to be: Fun, rewarding, and quick.</p>
1123 <h2>What to do now?</h2>
1124 <p>That really depends on what <b>you</b> want to do.
1125 We do, however, provide you with a few starting points.</p>
1126 <p>If you want to jump right into web development with Catalyst
1127 you might want want to start with a tutorial.</p>
1128 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1130 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1132 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1133 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1135 <h2>What to do next?</h2>
1136 <p>Next it's time to write an actual application. Use the
1137 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1138 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1139 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1140 they can save you a lot of work.</p>
1141 <pre><code>script/${prefix}_create.pl -help</code></pre>
1142 <p>Also, be sure to check out the vast and growing
1143 collection of <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3APlugin%3A%3A&mode=all">plugins for Catalyst on CPAN</a>;
1144 you are likely to find what you need there.
1148 <p>Catalyst has a very active community. Here are the main places to
1149 get in touch with us.</p>
1152 <a href="http://dev.catalyst.perl.org">Wiki</a>
1155 <a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
1158 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1161 <h2>In conclusion</h2>
1162 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1163 as we enjoyed making it. Please contact us if you have ideas
1164 for improvement or other feedback.</p>
1172 =head1 INTERNAL METHODS
1174 These methods are not meant to be used by end users.
1176 =head2 $c->components
1178 Returns a hash of components.
1180 =head2 $c->context_class
1182 Returns or sets the context class.
1186 Returns a hashref containing coderefs and execution counts (needed for
1187 deep recursion detection).
1191 Returns the number of actions on the current internal execution stack.
1195 Dispatches a request to actions.
1199 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1201 =head2 $c->dispatcher_class
1203 Returns or sets the dispatcher class.
1205 =head2 $c->dump_these
1207 Returns a list of 2-element array references (name, structure) pairs
1208 that will be dumped on the error page in debug mode.
1214 [ Request => $c->req ],
1215 [ Response => $c->res ],
1216 [ Stash => $c->stash ],
1217 [ Config => $c->config ];
1220 =head2 $c->engine_class
1222 Returns or sets the engine class.
1224 =head2 $c->execute( $class, $coderef )
1226 Execute a coderef in given class and catch exceptions. Errors are available
1232 my ( $c, $class, $code ) = @_;
1233 $class = $c->component($class) || $class;
1236 if ( $c->depth >= $RECURSION ) {
1237 my $action = $code->reverse();
1238 $action = "/$action" unless $action =~ /->/;
1239 my $error = qq/Deep recursion detected calling "${action}"/;
1240 $c->log->error($error);
1246 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1248 push( @{ $c->stack }, $code );
1250 eval { $c->state( $code->execute( $class, $c, @{ $c->req->args } ) || 0 ) };
1252 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1254 my $last = pop( @{ $c->stack } );
1256 if ( my $error = $@ ) {
1257 if ( !ref($error) and $error eq $DETACH ) { die $DETACH if $c->depth > 1 }
1259 unless ( ref $error ) {
1260 no warnings 'uninitialized';
1262 my $class = $last->class;
1263 my $name = $last->name;
1264 $error = qq/Caught exception in $class->$name "$error"/;
1273 sub _stats_start_execute {
1274 my ( $c, $code ) = @_;
1276 return if ( ( $code->name =~ /^_.*/ )
1277 && ( !$c->config->{show_internal_actions} ) );
1279 my $action_name = $code->reverse();
1280 $c->counter->{$action_name}++;
1282 my $action = $action_name;
1283 $action = "/$action" unless $action =~ /->/;
1285 # determine if the call was the result of a forward
1286 # this is done by walking up the call stack and looking for a calling
1287 # sub of Catalyst::forward before the eval
1289 for my $index ( 2 .. 11 ) {
1291 if ( ( caller($index) )[0] eq 'Catalyst'
1292 && ( caller($index) )[3] eq '(eval)' );
1294 if ( ( caller($index) )[3] =~ /forward$/ ) {
1295 $callsub = ( caller($index) )[3];
1296 $action = "-> $action";
1301 my $uid = $action_name . $c->counter->{$action_name};
1303 # is this a root-level call or a forwarded call?
1304 if ( $callsub =~ /forward$/ ) {
1306 # forward, locate the caller
1307 if ( my $parent = $c->stack->[-1] ) {
1310 parent => "$parent" . $c->counter->{"$parent"},
1316 # forward with no caller may come from a plugin
1335 sub _stats_finish_execute {
1336 my ( $c, $info ) = @_;
1337 $c->stats->profile( end => $info );
1340 =head2 $c->_localize_fields( sub { }, \%keys );
1344 #Why does this exist? This is no longer safe and WILL NOT WORK.
1345 # it doesnt seem to be used anywhere. can we remove it?
1346 sub _localize_fields {
1347 my ( $c, $localized, $code ) = ( @_ );
1349 my $request = delete $localized->{request} || {};
1350 my $response = delete $localized->{response} || {};
1352 local @{ $c }{ keys %$localized } = values %$localized;
1353 local @{ $c->request }{ keys %$request } = values %$request;
1354 local @{ $c->response }{ keys %$response } = values %$response;
1361 Finalizes the request.
1368 for my $error ( @{ $c->error } ) {
1369 $c->log->error($error);
1372 # Allow engine to handle finalize flow (for POE)
1373 my $engine = $c->engine;
1374 if ( my $code = $engine->can('finalize') ) {
1379 $c->finalize_uploads;
1382 if ( $#{ $c->error } >= 0 ) {
1386 $c->finalize_headers;
1389 if ( $c->request->method eq 'HEAD' ) {
1390 $c->response->body('');
1396 if ($c->use_stats) {
1397 my $elapsed = sprintf '%f', $c->stats->elapsed;
1398 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1400 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1403 return $c->response->status;
1406 =head2 $c->finalize_body
1412 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1414 =head2 $c->finalize_cookies
1420 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1422 =head2 $c->finalize_error
1428 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1430 =head2 $c->finalize_headers
1436 sub finalize_headers {
1439 my $response = $c->response; #accessor calls can add up?
1441 # Check if we already finalized headers
1442 return if $response->finalized_headers;
1445 if ( my $location = $response->redirect ) {
1446 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1447 $response->header( Location => $location );
1449 #Moose TODO: we should probably be using a predicate method here ?
1450 if ( !$response->body ) {
1451 # Add a default body if none is already present
1453 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1459 if ( $response->body && !$response->content_length ) {
1461 # get the length from a filehandle
1462 if ( blessed( $response->body ) && $response->body->can('read') )
1464 my $stat = stat $response->body;
1465 if ( $stat && $stat->size > 0 ) {
1466 $response->content_length( $stat->size );
1469 $c->log->warn('Serving filehandle without a content-length');
1473 # everything should be bytes at this point, but just in case
1474 $response->content_length( bytes::length( $response->body ) );
1479 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1480 $response->headers->remove_header("Content-Length");
1481 $response->body('');
1484 $c->finalize_cookies;
1486 $c->engine->finalize_headers( $c, @_ );
1489 $response->finalized_headers(1);
1492 =head2 $c->finalize_output
1494 An alias for finalize_body.
1496 =head2 $c->finalize_read
1498 Finalizes the input after reading is complete.
1502 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1504 =head2 $c->finalize_uploads
1506 Finalizes uploads. Cleans up any temporary files.
1510 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1512 =head2 $c->get_action( $action, $namespace )
1514 Gets an action in a given namespace.
1518 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1520 =head2 $c->get_actions( $action, $namespace )
1522 Gets all actions of a given name in a namespace and all parent
1527 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1529 =head2 $c->handle_request( $class, @arguments )
1531 Called to handle each HTTP request.
1535 sub handle_request {
1536 my ( $class, @arguments ) = @_;
1538 # Always expect worst case!
1541 if ($class->debug) {
1542 my $secs = time - $START || 1;
1543 my $av = sprintf '%.3f', $COUNT / $secs;
1544 my $time = localtime time;
1545 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1548 my $c = $class->prepare(@arguments);
1550 $status = $c->finalize;
1553 if ( my $error = $@ ) {
1555 $class->log->error(qq/Caught exception in engine "$error"/);
1560 if(my $coderef = $class->log->can('_flush')){
1561 $class->log->$coderef();
1566 =head2 $c->prepare( @arguments )
1568 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1574 my ( $class, @arguments ) = @_;
1577 # After the app/ctxt split, this should become an attribute based on something passed
1578 # into the application.
1579 $class->context_class( ref $class || $class ) unless $class->context_class;
1581 my $c = $class->context_class->new({});
1583 # For on-demand data
1584 $c->request->_context($c);
1585 $c->response->_context($c);
1587 #surely this is not the most efficient way to do things...
1588 $c->stats($class->stats_class->new)->enable($c->use_stats);
1590 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1593 #XXX reuse coderef from can
1594 # Allow engine to direct the prepare flow (for POE)
1595 if ( $c->engine->can('prepare') ) {
1596 $c->engine->prepare( $c, @arguments );
1599 $c->prepare_request(@arguments);
1600 $c->prepare_connection;
1601 $c->prepare_query_parameters;
1602 $c->prepare_headers;
1603 $c->prepare_cookies;
1606 # Prepare the body for reading, either by prepare_body
1607 # or the user, if they are using $c->read
1610 # Parse the body unless the user wants it on-demand
1611 unless ( $c->config->{parse_on_demand} ) {
1616 my $method = $c->req->method || '';
1617 my $path = $c->req->path || '/';
1618 my $address = $c->req->address || '';
1620 $c->log->debug(qq/"$method" request for "$path" from "$address"/)
1628 =head2 $c->prepare_action
1630 Prepares action. See L<Catalyst::Dispatcher>.
1634 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1636 =head2 $c->prepare_body
1638 Prepares message body.
1645 #Moose TODO: what is _body ??
1646 # Do we run for the first time?
1647 return if defined $c->request->{_body};
1649 # Initialize on-demand data
1650 $c->engine->prepare_body( $c, @_ );
1651 $c->prepare_parameters;
1652 $c->prepare_uploads;
1654 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1655 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1656 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1657 my $param = $c->req->body_parameters->{$key};
1658 my $value = defined($param) ? $param : '';
1660 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1662 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1666 =head2 $c->prepare_body_chunk( $chunk )
1668 Prepares a chunk of data before sending it to L<HTTP::Body>.
1670 See L<Catalyst::Engine>.
1674 sub prepare_body_chunk {
1676 $c->engine->prepare_body_chunk( $c, @_ );
1679 =head2 $c->prepare_body_parameters
1681 Prepares body parameters.
1685 sub prepare_body_parameters {
1687 $c->engine->prepare_body_parameters( $c, @_ );
1690 =head2 $c->prepare_connection
1692 Prepares connection.
1696 sub prepare_connection {
1698 $c->engine->prepare_connection( $c, @_ );
1701 =head2 $c->prepare_cookies
1707 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1709 =head2 $c->prepare_headers
1715 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1717 =head2 $c->prepare_parameters
1719 Prepares parameters.
1723 sub prepare_parameters {
1725 $c->prepare_body_parameters;
1726 $c->engine->prepare_parameters( $c, @_ );
1729 =head2 $c->prepare_path
1731 Prepares path and base.
1735 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
1737 =head2 $c->prepare_query_parameters
1739 Prepares query parameters.
1743 sub prepare_query_parameters {
1746 $c->engine->prepare_query_parameters( $c, @_ );
1748 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
1749 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1750 for my $key ( sort keys %{ $c->req->query_parameters } ) {
1751 my $param = $c->req->query_parameters->{$key};
1752 my $value = defined($param) ? $param : '';
1754 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1756 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1760 =head2 $c->prepare_read
1762 Prepares the input for reading.
1766 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1768 =head2 $c->prepare_request
1770 Prepares the engine request.
1774 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1776 =head2 $c->prepare_uploads
1782 sub prepare_uploads {
1785 $c->engine->prepare_uploads( $c, @_ );
1787 if ( $c->debug && keys %{ $c->request->uploads } ) {
1788 my $t = Text::SimpleTable->new(
1789 [ 12, 'Parameter' ],
1794 for my $key ( sort keys %{ $c->request->uploads } ) {
1795 my $upload = $c->request->uploads->{$key};
1796 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1797 $t->row( $key, $u->filename, $u->type, $u->size );
1800 $c->log->debug( "File Uploads are:\n" . $t->draw );
1804 =head2 $c->prepare_write
1806 Prepares the output for writing.
1810 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1812 =head2 $c->request_class
1814 Returns or sets the request class.
1816 =head2 $c->response_class
1818 Returns or sets the response class.
1820 =head2 $c->read( [$maxlength] )
1822 Reads a chunk of data from the request body. This method is designed to
1823 be used in a while loop, reading C<$maxlength> bytes on every call.
1824 C<$maxlength> defaults to the size of the request if not specified.
1826 You have to set C<< MyApp->config->{parse_on_demand} >> to use this
1829 Warning: If you use read(), Catalyst will not process the body,
1830 so you will not be able to access POST parameters or file uploads via
1831 $c->request. You must handle all body parsing yourself.
1835 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1843 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1845 =head2 $c->set_action( $action, $code, $namespace, $attrs )
1847 Sets an action in a given namespace.
1851 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1853 =head2 $c->setup_actions($component)
1855 Sets up actions for a component.
1859 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1861 =head2 $c->setup_components
1863 Sets up components. Specify a C<setup_components> config option to pass
1864 additional options directly to L<Module::Pluggable>. To add additional
1865 search paths, specify a key named C<search_extra> as an array
1866 reference. Items in the array beginning with C<::> will have the
1867 application class name prepended to them.
1871 sub setup_components {
1874 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
1875 my $config = $class->config->{ setup_components };
1876 my $extra = delete $config->{ search_extra } || [];
1878 push @paths, @$extra;
1880 my $locator = Module::Pluggable::Object->new(
1881 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
1885 my @comps = sort { length $a <=> length $b } $locator->plugins;
1886 my %comps = map { $_ => 1 } @comps;
1888 for my $component ( @comps ) {
1890 # We pass ignore_loaded here so that overlay files for (e.g.)
1891 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
1892 # we know M::P::O found a file on disk so this is safe
1894 Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
1895 #Class::MOP::load_class($component);
1897 my $module = $class->setup_component( $component );
1899 $component => $module,
1901 $_ => $class->setup_component( $_ )
1903 not exists $comps{$_}
1904 } Devel::InnerPackage::list_packages( $component )
1907 for my $key ( keys %modules ) {
1908 $class->components->{ $key } = $modules{ $key };
1913 =head2 $c->setup_component
1917 sub setup_component {
1918 my( $class, $component ) = @_;
1920 unless ( $component->can( 'COMPONENT' ) ) {
1924 my $suffix = Catalyst::Utils::class2classsuffix( $component );
1925 my $config = $class->config->{ $suffix } || {};
1927 my $instance = eval { $component->COMPONENT( $class, $config ); };
1929 if ( my $error = $@ ) {
1931 Catalyst::Exception->throw(
1932 message => qq/Couldn't instantiate component "$component", "$error"/
1936 Catalyst::Exception->throw(
1938 qq/Couldn't instantiate component "$component", "COMPONENT() didn't return an object-like value"/
1939 ) unless blessed($instance);
1944 =head2 $c->setup_dispatcher
1950 sub setup_dispatcher {
1951 my ( $class, $dispatcher ) = @_;
1954 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1957 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
1958 $dispatcher = 'Catalyst::Dispatcher::' . $env;
1961 unless ($dispatcher) {
1962 $dispatcher = $class->dispatcher_class;
1965 Class::MOP::load_class($dispatcher);
1967 # dispatcher instance
1968 $class->dispatcher( $dispatcher->new );
1971 =head2 $c->setup_engine
1978 my ( $class, $engine ) = @_;
1981 $engine = 'Catalyst::Engine::' . $engine;
1984 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
1985 $engine = 'Catalyst::Engine::' . $env;
1988 if ( $ENV{MOD_PERL} ) {
1990 # create the apache method
1991 $class->meta->add_method('apache' => sub { shift->engine->apache });
1993 my ( $software, $version ) =
1994 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
1997 $version =~ s/(\.[^.]+)\./$1/g;
1999 if ( $software eq 'mod_perl' ) {
2003 if ( $version >= 1.99922 ) {
2004 $engine = 'Catalyst::Engine::Apache2::MP20';
2007 elsif ( $version >= 1.9901 ) {
2008 $engine = 'Catalyst::Engine::Apache2::MP19';
2011 elsif ( $version >= 1.24 ) {
2012 $engine = 'Catalyst::Engine::Apache::MP13';
2016 Catalyst::Exception->throw( message =>
2017 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2022 # install the correct mod_perl handler
2023 if ( $version >= 1.9901 ) {
2024 *handler = sub : method {
2025 shift->handle_request(@_);
2029 *handler = sub ($$) { shift->handle_request(@_) };
2034 elsif ( $software eq 'Zeus-Perl' ) {
2035 $engine = 'Catalyst::Engine::Zeus';
2039 Catalyst::Exception->throw(
2040 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2045 $engine = $class->engine_class;
2048 Class::MOP::load_class($engine);
2049 #unless (Class::Inspector->loaded($engine)) {
2050 # require Class::Inspector->filename($engine);
2053 # check for old engines that are no longer compatible
2055 if ( $engine->isa('Catalyst::Engine::Apache')
2056 && !Catalyst::Engine::Apache->VERSION )
2061 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2062 && Catalyst::Engine::Server->VERSION le '0.02' )
2067 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2068 && $engine->VERSION eq '0.01' )
2073 elsif ($engine->isa('Catalyst::Engine::Zeus')
2074 && $engine->VERSION eq '0.01' )
2080 Catalyst::Exception->throw( message =>
2081 qq/Engine "$engine" is not supported by this version of Catalyst/
2086 $class->engine( $engine->new );
2089 =head2 $c->setup_home
2091 Sets up the home directory.
2096 my ( $class, $home ) = @_;
2098 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2102 $home ||= Catalyst::Utils::home($class);
2105 #I remember recently being scolded for assigning config values like this
2106 $class->config->{home} ||= $home;
2107 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2111 =head2 $c->setup_log
2118 my ( $class, $debug ) = @_;
2120 unless ( $class->log ) {
2121 $class->log( Catalyst::Log->new );
2124 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2125 if ( defined($env_debug) ? $env_debug : $debug ) {
2126 $class->meta->add_method('debug' => sub { 1 });
2127 $class->log->debug('Debug messages enabled');
2131 =head2 $c->setup_plugins
2137 =head2 $c->setup_stats
2139 Sets up timing statistics class.
2144 my ( $class, $stats ) = @_;
2146 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2148 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2149 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2150 $class->meta->add_method('use_stats' => sub { 1 });
2151 $class->log->debug('Statistics enabled');
2156 =head2 $c->registered_plugins
2158 Returns a sorted list of the plugins which have either been stated in the
2159 import list or which have been added via C<< MyApp->plugin(@args); >>.
2161 If passed a given plugin name, it will report a boolean value indicating
2162 whether or not that plugin is loaded. A fully qualified name is required if
2163 the plugin name does not begin with C<Catalyst::Plugin::>.
2165 if ($c->registered_plugins('Some::Plugin')) {
2173 sub registered_plugins {
2175 return sort keys %{ $proto->_plugins } unless @_;
2177 return 1 if exists $proto->_plugins->{$plugin};
2178 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2181 sub _register_plugin {
2182 my ( $proto, $plugin, $instant ) = @_;
2183 my $class = ref $proto || $proto;
2185 # no ignore_loaded here, the plugin may already have been
2186 # defined in memory and we don't want to error on "no file" if so
2188 Class::MOP::load_class( $plugin );
2190 $proto->_plugins->{$plugin} = 1;
2193 if( $class->can('meta') ){
2194 my @superclasses = ($plugin, $class->meta->superclasses );
2195 $class->meta->superclasses(@superclasses);
2197 unshift @{"$class\::ISA"}, $plugin;
2204 my ( $class, $plugins ) = @_;
2206 $class->_plugins( {} ) unless $class->_plugins;
2208 for my $plugin ( reverse @$plugins ) {
2210 unless ( $plugin =~ s/\A\+// ) {
2211 $plugin = "Catalyst::Plugin::$plugin";
2214 $class->_register_plugin($plugin);
2221 Returns an arrayref of the internal execution stack (actions that are
2222 currently executing).
2224 =head2 $c->stats_class
2226 Returns or sets the stats (timing statistics) class.
2228 =head2 $c->use_stats
2230 Returns 1 when stats collection is enabled. Stats collection is enabled
2231 when the -Stats options is set, debug is on or when the <MYAPP>_STATS
2232 environment variable is set.
2234 Note that this is a static method, not an accessor and should be overloaded
2235 by declaring "sub use_stats { 1 }" in your MyApp.pm, not by calling $c->use_stats(1).
2242 =head2 $c->write( $data )
2244 Writes $data to the output stream. When using this method directly, you
2245 will need to manually set the C<Content-Length> header to the length of
2246 your output data, if known.
2253 # Finalize headers if someone manually writes output
2254 $c->finalize_headers;
2256 return $c->engine->write( $c, @_ );
2261 Returns the Catalyst version number. Mostly useful for "powered by"
2262 messages in template systems.
2266 sub version { return $Catalyst::VERSION }
2268 =head1 INTERNAL ACTIONS
2270 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2271 C<_ACTION>, and C<_END>. These are by default not shown in the private
2272 action table, but you can make them visible with a config parameter.
2274 MyApp->config->{show_internal_actions} = 1;
2276 =head1 CASE SENSITIVITY
2278 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> is
2279 mapped to C</foo/bar>. You can activate case sensitivity with a config
2282 MyApp->config->{case_sensitive} = 1;
2284 This causes C<MyApp::C::Foo::Bar> to map to C</Foo/Bar>.
2286 =head1 ON-DEMAND PARSER
2288 The request body is usually parsed at the beginning of a request,
2289 but if you want to handle input yourself, you can enable on-demand
2290 parsing with a config parameter.
2292 MyApp->config->{parse_on_demand} = 1;
2294 =head1 PROXY SUPPORT
2296 Many production servers operate using the common double-server approach,
2297 with a lightweight frontend web server passing requests to a larger
2298 backend server. An application running on the backend server must deal
2299 with two problems: the remote user always appears to be C<127.0.0.1> and
2300 the server's hostname will appear to be C<localhost> regardless of the
2301 virtual host that the user connected through.
2303 Catalyst will automatically detect this situation when you are running
2304 the frontend and backend servers on the same machine. The following
2305 changes are made to the request.
2307 $c->req->address is set to the user's real IP address, as read from
2308 the HTTP X-Forwarded-For header.
2310 The host value for $c->req->base and $c->req->uri is set to the real
2311 host, as read from the HTTP X-Forwarded-Host header.
2313 Obviously, your web server must support these headers for this to work.
2315 In a more complex server farm environment where you may have your
2316 frontend proxy server(s) on different machines, you will need to set a
2317 configuration option to tell Catalyst to read the proxied data from the
2320 MyApp->config->{using_frontend_proxy} = 1;
2322 If you do not wish to use the proxy support at all, you may set:
2324 MyApp->config->{ignore_frontend_proxy} = 1;
2326 =head1 THREAD SAFETY
2328 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2329 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2330 believe the Catalyst core to be thread-safe.
2332 If you plan to operate in a threaded environment, remember that all other
2333 modules you are using must also be thread-safe. Some modules, most notably
2334 L<DBD::SQLite>, are not thread-safe.
2340 Join #catalyst on irc.perl.org.
2344 http://lists.rawmode.org/mailman/listinfo/catalyst
2345 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
2349 http://catalyst.perl.org
2353 http://dev.catalyst.perl.org
2357 =head2 L<Task::Catalyst> - All you need to start with Catalyst
2359 =head2 L<Catalyst::Manual> - The Catalyst Manual
2361 =head2 L<Catalyst::Component>, L<Catalyst::Base> - Base classes for components
2363 =head2 L<Catalyst::Engine> - Core engine
2365 =head2 L<Catalyst::Log> - Log class.
2367 =head2 L<Catalyst::Request> - Request object
2369 =head2 L<Catalyst::Response> - Response object
2371 =head2 L<Catalyst::Test> - The test suite.
2445 Sebastian Riedel, C<sri@oook.de>
2449 This library is free software, you can redistribute it and/or modify it under
2450 the same terms as Perl itself.