4 extends 'Catalyst::Component';
6 use Catalyst::Exception;
9 use Catalyst::Request::Upload;
10 use Catalyst::Response;
12 use Catalyst::Controller;
13 use Devel::InnerPackage ();
15 use Module::Pluggable::Object ();
17 use Text::SimpleTable ();
18 use Path::Class::Dir ();
19 use Path::Class::File ();
20 use Time::HiRes qw/gettimeofday tv_interval/;
24 use Scalar::Util qw/weaken blessed/;
25 use Tree::Simple qw/use_weak_refs/;
26 use Tree::Simple::Visitor::FindByUID;
29 use Carp qw/croak carp/;
31 BEGIN { require 5.008001; }
33 has stack => (is => 'rw');
34 has stash => (is => 'rw');
35 has state => (is => 'rw');
36 has stats => (is => 'rw');
37 has action => (is => 'rw');
38 has counter => (is => 'rw');
39 has request => (is => 'rw');
40 has response => (is => 'rw');
41 has namespace => (is => 'rw');
44 attributes->import( __PACKAGE__, \&namespace, 'lvalue' );
46 sub depth { scalar @{ shift->stack || [] }; }
53 # For backwards compatibility
54 *finalize_output = \&finalize_body;
59 our $RECURSION = 1000;
60 our $DETACH = "catalyst_detach\n";
62 __PACKAGE__->mk_classdata($_)
63 for qw/components arguments dispatcher engine log dispatcher_class
64 engine_class context_class request_class response_class stats_class
67 __PACKAGE__->dispatcher_class('Catalyst::Dispatcher');
68 __PACKAGE__->engine_class('Catalyst::Engine::CGI');
69 __PACKAGE__->request_class('Catalyst::Request');
70 __PACKAGE__->response_class('Catalyst::Response');
71 __PACKAGE__->stats_class('Catalyst::Stats');
73 # Remember to update this in Catalyst::Runtime as well!
75 our $VERSION = '5.7013';
78 my ( $class, @arguments ) = @_;
80 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
82 return unless $class eq 'Catalyst';
84 my $caller = caller(0);
86 #why does called have to ISA Catalyst and ISA Controller ?
87 unless ( $caller->isa('Catalyst') ) {
89 if( $caller->can('meta') ){
90 my @superclasses = ($caller->meta->superclasses, $class, 'Catalyst::Controller');
91 $caller->meta->superclasses(@superclasses);
93 push @{"$caller\::ISA"}, $class, 'Catalyst::Controller';
97 $caller->arguments( [@arguments] );
103 Catalyst - The Elegant MVC Web Application Framework
107 See the L<Catalyst::Manual> distribution for comprehensive
108 documentation and tutorials.
110 # Install Catalyst::Devel for helpers and other development tools
111 # use the helper to create a new application
114 # add models, views, controllers
115 script/myapp_create.pl model MyDatabase DBIC::Schema create=dynamic dbi:SQLite:/path/to/db
116 script/myapp_create.pl view MyTemplate TT
117 script/myapp_create.pl controller Search
119 # built in testserver -- use -r to restart automatically on changes
120 # --help to see all available options
121 script/myapp_server.pl
123 # command line testing interface
124 script/myapp_test.pl /yada
127 use Catalyst qw/-Debug/; # include plugins here as well
129 ### In lib/MyApp/Controller/Root.pm (autocreated)
130 sub foo : Global { # called for /foo, /foo/1, /foo/1/2, etc.
131 my ( $self, $c, @args ) = @_; # args are qw/1 2/ for /foo/1/2
132 $c->stash->{template} = 'foo.tt'; # set the template
133 # lookup something from db -- stash vars are passed to TT
135 $c->model('Database::Foo')->search( { country => $args[0] } );
136 if ( $c->req->params->{bar} ) { # access GET or POST parameters
137 $c->forward( 'bar' ); # process another action
138 # do something else after forward returns
142 # The foo.tt TT template can use the stash data from the database
143 [% WHILE (item = data.next) %]
147 # called for /bar/of/soap, /bar/of/soap/10, etc.
148 sub bar : Path('/bar/of/soap') { ... }
150 # called for all actions, from the top-most controller downwards
152 my ( $self, $c ) = @_;
153 if ( !$c->user_exists ) { # Catalyst::Plugin::Authentication
154 $c->res->redirect( '/login' ); # require login
155 return 0; # abort request and go immediately to end()
157 return 1; # success; carry on to next action
160 # called after all actions are finished
162 my ( $self, $c ) = @_;
163 if ( scalar @{ $c->error } ) { ... } # handle errors
164 return if $c->res->body; # already have a response
165 $c->forward( 'MyApp::View::TT' ); # render template
168 ### in MyApp/Controller/Foo.pm
169 # called for /foo/bar
170 sub bar : Local { ... }
172 # called for /blargle
173 sub blargle : Global { ... }
175 # an index action matches /foo, but not /foo/1, etc.
176 sub index : Private { ... }
178 ### in MyApp/Controller/Foo/Bar.pm
179 # called for /foo/bar/baz
180 sub baz : Local { ... }
182 # first Root auto is called, then Foo auto, then this
183 sub auto : Private { ... }
185 # powerful regular expression paths are also possible
186 sub details : Regex('^product/(\w+)/details$') {
187 my ( $self, $c ) = @_;
188 # extract the (\w+) from the URI
189 my $product = $c->req->captures->[0];
192 See L<Catalyst::Manual::Intro> for additional information.
196 Catalyst is a modern framework for making web applications without the
197 pain usually associated with this process. This document is a reference
198 to the main Catalyst application. If you are a new user, we suggest you
199 start with L<Catalyst::Manual::Tutorial> or L<Catalyst::Manual::Intro>.
201 See L<Catalyst::Manual> for more documentation.
203 Catalyst plugins can be loaded by naming them as arguments to the "use
204 Catalyst" statement. Omit the C<Catalyst::Plugin::> prefix from the
205 plugin name, i.e., C<Catalyst::Plugin::My::Module> becomes
208 use Catalyst qw/My::Module/;
210 If your plugin starts with a name other than C<Catalyst::Plugin::>, you can
211 fully qualify the name by using a unary plus:
215 +Fully::Qualified::Plugin::Name
218 Special flags like C<-Debug> and C<-Engine> can also be specified as
219 arguments when Catalyst is loaded:
221 use Catalyst qw/-Debug My::Module/;
223 The position of plugins and flags in the chain is important, because
224 they are loaded in the order in which they appear.
226 The following flags are supported:
230 Enables debug output. You can also force this setting from the system
231 environment with CATALYST_DEBUG or <MYAPP>_DEBUG. The environment
232 settings override the application, with <MYAPP>_DEBUG having the highest
237 Forces Catalyst to use a specific engine. Omit the
238 C<Catalyst::Engine::> prefix of the engine name, i.e.:
240 use Catalyst qw/-Engine=CGI/;
244 Forces Catalyst to use a specific home directory, e.g.:
246 use Catalyst qw[-Home=/usr/mst];
248 This can also be done in the shell environment by setting either the
249 C<CATALYST_HOME> environment variable or C<MYAPP_HOME>; where C<MYAPP>
250 is replaced with the uppercased name of your application, any "::" in
251 the name will be replaced with underscores, e.g. MyApp::Web should use
252 MYAPP_WEB_HOME. If both variables are set, the MYAPP_HOME one will be used.
260 Enables statistics collection and reporting. You can also force this setting
261 from the system environment with CATALYST_STATS or <MYAPP>_STATS. The
262 environment settings override the application, with <MYAPP>_STATS having the
267 use Catalyst qw/-Stats=1/
271 =head2 INFORMATION ABOUT THE CURRENT REQUEST
275 Returns a L<Catalyst::Action> object for the current action, which
276 stringifies to the action name. See L<Catalyst::Action>.
280 Returns the namespace of the current action, i.e., the URI prefix
281 corresponding to the controller of the current action. For example:
283 # in Controller::Foo::Bar
284 $c->namespace; # returns 'foo/bar';
290 Returns the current L<Catalyst::Request> object, giving access to
291 information about the current client request (including parameters,
292 cookies, HTTP headers, etc.). See L<Catalyst::Request>.
294 =head2 REQUEST FLOW HANDLING
296 =head2 $c->forward( $action [, \@arguments ] )
298 =head2 $c->forward( $class, $method, [, \@arguments ] )
300 Forwards processing to another action, by its private name. If you give a
301 class name but no method, C<process()> is called. You may also optionally
302 pass arguments in an arrayref. The action will receive the arguments in
303 C<@_> and C<< $c->req->args >>. Upon returning from the function,
304 C<< $c->req->args >> will be restored to the previous values.
306 Any data C<return>ed from the action forwarded to, will be returned by the
309 my $foodata = $c->forward('/foo');
310 $c->forward('index');
311 $c->forward(qw/MyApp::Model::DBIC::Foo do_stuff/);
312 $c->forward('MyApp::View::TT');
314 Note that forward implies an C<<eval { }>> around the call (actually
315 C<execute> does), thus de-fatalizing all 'dies' within the called
316 action. If you want C<die> to propagate you need to do something like:
319 die $c->error if $c->error;
321 Or make sure to always return true values from your actions and write
324 $c->forward('foo') || return;
328 sub forward { my $c = shift; $c->dispatcher->forward( $c, @_ ) }
330 =head2 $c->detach( $action [, \@arguments ] )
332 =head2 $c->detach( $class, $method, [, \@arguments ] )
336 The same as C<forward>, but doesn't return to the previous action when
337 processing is finished.
339 When called with no arguments it escapes the processing chain entirely.
343 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
349 Returns the current L<Catalyst::Response> object, see there for details.
353 Returns a hashref to the stash, which may be used to store data and pass
354 it between components during a request. You can also set hash keys by
355 passing arguments. The stash is automatically sent to the view. The
356 stash is cleared at the end of a request; it cannot be used for
357 persistent storage (for this you must use a session; see
358 L<Catalyst::Plugin::Session> for a complete system integrated with
361 $c->stash->{foo} = $bar;
362 $c->stash( { moose => 'majestic', qux => 0 } );
363 $c->stash( bar => 1, gorch => 2 ); # equivalent to passing a hashref
365 # stash is automatically passed to the view for use in a template
366 $c->forward( 'MyApp::View::TT' );
370 around stash => sub {
374 my $stash = @_ > 1 ? {@_} : $_[0];
375 croak('stash takes a hash or hashref') unless ref $stash;
376 foreach my $key ( keys %$stash ) {
377 $c->$orig()->{$key} = $stash->{$key};
385 =head2 $c->error($error, ...)
387 =head2 $c->error($arrayref)
389 Returns an arrayref containing error messages. If Catalyst encounters an
390 error while processing a request, it stores the error in $c->error. This
391 method should only be used to store fatal error messages.
393 my @error = @{ $c->error };
397 $c->error('Something bad happened');
404 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
405 croak @$error unless ref $c;
406 push @{ $c->{error} }, @$error;
408 elsif ( defined $_[0] ) { $c->{error} = undef }
409 return $c->{error} || [];
415 Contains the return value of the last executed action.
417 =head2 $c->clear_errors
419 Clear errors. You probably don't want to clear the errors unless you are
420 implementing a custom error screen.
422 This is equivalent to running
436 my ( $c, @names ) = @_;
438 foreach my $name (@names) {
439 foreach my $component ( keys %{ $c->components } ) {
440 return $c->components->{$component} if $component =~ /$name/i;
447 # try explicit component names
449 my ( $c, @names ) = @_;
451 foreach my $try (@names) {
452 return $c->components->{$try} if ( exists $c->components->{$try} );
458 # like component, but try just these prefixes before regex searching,
459 # and do not try to return "sort keys %{ $c->components }"
461 my ( $c, $name, @prefixes ) = @_;
463 my $appclass = ref $c || $c;
465 my @names = map { "${appclass}::${_}::${name}" } @prefixes;
467 my $comp = $c->_comp_explicit(@names);
468 return $comp if defined($comp);
469 $comp = $c->_comp_search($name);
473 # Find possible names for a prefix
476 my ( $c, @prefixes ) = @_;
478 my $appclass = ref $c || $c;
480 my @pre = map { "${appclass}::${_}::" } @prefixes;
484 COMPONENT: foreach my $comp ($c->component) {
485 foreach my $p (@pre) {
486 if ($comp =~ s/^$p//) {
496 # Return a component if only one matches.
498 my ( $c, @prefixes ) = @_;
500 my $appclass = ref $c || $c;
502 my ( $comp, $rest ) =
503 map { $c->_comp_search("^${appclass}::${_}::") } @prefixes;
504 return $comp unless $rest;
507 # Filter a component before returning by calling ACCEPT_CONTEXT if available
508 sub _filter_component {
509 my ( $c, $comp, @args ) = @_;
510 if ( eval { $comp->can('ACCEPT_CONTEXT'); } ) {
511 return $comp->ACCEPT_CONTEXT( $c, @args );
513 else { return $comp }
516 =head2 COMPONENT ACCESSORS
518 =head2 $c->controller($name)
520 Gets a L<Catalyst::Controller> instance by name.
522 $c->controller('Foo')->do_stuff;
524 If the name is omitted, will return the controller for the dispatched
530 my ( $c, $name, @args ) = @_;
531 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Controller C/ ),
534 return $c->component( $c->action->class );
537 =head2 $c->model($name)
539 Gets a L<Catalyst::Model> instance by name.
541 $c->model('Foo')->do_stuff;
543 Any extra arguments are directly passed to ACCEPT_CONTEXT.
545 If the name is omitted, it will look for
546 - a model object in $c->stash{current_model_instance}, then
547 - a model name in $c->stash->{current_model}, then
548 - a config setting 'default_model', or
549 - check if there is only one model, and return it if that's the case.
554 my ( $c, $name, @args ) = @_;
555 return $c->_filter_component( $c->_comp_prefixes( $name, qw/Model M/ ),
559 return $c->stash->{current_model_instance}
560 if $c->stash->{current_model_instance};
561 return $c->model( $c->stash->{current_model} )
562 if $c->stash->{current_model};
564 return $c->model( $c->config->{default_model} )
565 if $c->config->{default_model};
566 return $c->_filter_component( $c->_comp_singular(qw/Model M/) );
570 =head2 $c->controllers
572 Returns the available names which can be passed to $c->controller
578 return $c->_comp_names(qw/Controller C/);
582 =head2 $c->view($name)
584 Gets a L<Catalyst::View> instance by name.
586 $c->view('Foo')->do_stuff;
588 Any extra arguments are directly passed to ACCEPT_CONTEXT.
590 If the name is omitted, it will look for
591 - a view object in $c->stash{current_view_instance}, then
592 - a view name in $c->stash->{current_view}, then
593 - a config setting 'default_view', or
594 - check if there is only one view, and return it if that's the case.
599 my ( $c, $name, @args ) = @_;
600 return $c->_filter_component( $c->_comp_prefixes( $name, qw/View V/ ),
604 return $c->stash->{current_view_instance}
605 if $c->stash->{current_view_instance};
606 return $c->view( $c->stash->{current_view} )
607 if $c->stash->{current_view};
609 return $c->view( $c->config->{default_view} )
610 if $c->config->{default_view};
611 return $c->_filter_component( $c->_comp_singular(qw/View V/) );
616 Returns the available names which can be passed to $c->model
622 return $c->_comp_names(qw/Model M/);
628 Returns the available names which can be passed to $c->view
634 return $c->_comp_names(qw/View V/);
637 =head2 $c->comp($name)
639 =head2 $c->component($name)
641 Gets a component object by name. This method is not recommended,
642 unless you want to get a specific component by full
643 class. C<< $c->controller >>, C<< $c->model >>, and C<< $c->view >>
644 should be used instead.
655 my $appclass = ref $c || $c;
658 $name, "${appclass}::${name}",
659 map { "${appclass}::${_}::${name}" }
660 qw/Model M Controller C View V/
663 my $comp = $c->_comp_explicit(@names);
664 return $c->_filter_component( $comp, @_ ) if defined($comp);
666 $comp = $c->_comp_search($name);
667 return $c->_filter_component( $comp, @_ ) if defined($comp);
670 return sort keys %{ $c->components };
675 =head2 CLASS DATA AND HELPER CLASSES
679 Returns or takes a hashref containing the application's configuration.
681 __PACKAGE__->config( { db => 'dsn:SQLite:foo.db' } );
683 You can also use a C<YAML>, C<XML> or C<Config::General> config file
684 like myapp.yml in your applications home directory. See
685 L<Catalyst::Plugin::ConfigLoader>.
688 db: dsn:SQLite:foo.db
693 around config => sub {
697 $c->log->warn("Setting config after setup has been run is not a good idea.")
698 if ( @_ and $c->setup_finished );
705 Returns the logging object instance. Unless it is already set, Catalyst
706 sets this up with a L<Catalyst::Log> object. To use your own log class,
707 set the logger with the C<< __PACKAGE__->log >> method prior to calling
708 C<< __PACKAGE__->setup >>.
710 __PACKAGE__->log( MyLogger->new );
715 $c->log->info( 'Now logging with my own logger!' );
717 Your log class should implement the methods described in
723 Overload to enable debug messages (same as -Debug option).
725 Note that this is a static method, not an accessor and should be overloaded
726 by declaring "sub debug { 1 }" in your MyApp.pm, not by calling $c->debug(1).
732 =head2 $c->dispatcher
734 Returns the dispatcher instance. Stringifies to class name. See
735 L<Catalyst::Dispatcher>.
739 Returns the engine instance. Stringifies to the class name. See
743 =head2 UTILITY METHODS
745 =head2 $c->path_to(@path)
747 Merges C<@path> with C<< $c->config->{home} >> and returns a
748 L<Path::Class::Dir> object.
752 $c->path_to( 'db', 'sqlite.db' );
757 my ( $c, @path ) = @_;
758 my $path = Path::Class::Dir->new( $c->config->{home}, @path );
759 if ( -d $path ) { return $path }
760 else { return Path::Class::File->new( $c->config->{home}, @path ) }
763 =head2 $c->plugin( $name, $class, @args )
765 Helper method for plugins. It creates a classdata accessor/mutator and
766 loads and instantiates the given class.
768 MyApp->plugin( 'prototype', 'HTML::Prototype' );
770 $c->prototype->define_javascript_functions;
775 my ( $class, $name, $plugin, @args ) = @_;
776 $class->_register_plugin( $plugin, 1 );
778 eval { $plugin->import };
779 $class->mk_classdata($name);
781 eval { $obj = $plugin->new(@args) };
784 Catalyst::Exception->throw( message =>
785 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
789 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
795 Initializes the dispatcher and engine, loads any plugins, and loads the
796 model, view, and controller components. You may also specify an array
797 of plugins to load here, if you choose to not load them in the C<use
801 MyApp->setup( qw/-Debug/ );
806 my ( $class, @arguments ) = @_;
808 $class->log->warn("Running setup twice is not a good idea.")
809 if ( $class->setup_finished );
811 unless ( $class->isa('Catalyst') ) {
813 Catalyst::Exception->throw(
814 message => qq/'$class' does not inherit from Catalyst/ );
817 if ( $class->arguments ) {
818 @arguments = ( @arguments, @{ $class->arguments } );
824 foreach (@arguments) {
828 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
830 elsif (/^-(\w+)=?(.*)$/) {
831 $flags->{ lc $1 } = $2;
834 push @{ $flags->{plugins} }, $_;
838 $class->setup_home( delete $flags->{home} );
840 $class->setup_log( delete $flags->{log} );
841 $class->setup_plugins( delete $flags->{plugins} );
842 $class->setup_dispatcher( delete $flags->{dispatcher} );
843 $class->setup_engine( delete $flags->{engine} );
844 $class->setup_stats( delete $flags->{stats} );
846 for my $flag ( sort keys %{$flags} ) {
848 if ( my $code = $class->can( 'setup_' . $flag ) ) {
849 &$code( $class, delete $flags->{$flag} );
852 $class->log->warn(qq/Unknown flag "$flag"/);
856 eval { require Catalyst::Devel; };
857 if( !$@ && $ENV{CATALYST_SCRIPT_GEN} && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::Devel::CATALYST_SCRIPT_GEN ) ) {
858 $class->log->warn(<<"EOF");
859 You are running an old script!
861 Please update by running (this will overwrite existing files):
862 catalyst.pl -force -scripts $class
864 or (this will not overwrite existing files):
865 catalyst.pl -scripts $class
870 if ( $class->debug ) {
871 my @plugins = map { "$_ " . ( $_->VERSION || '' ) } $class->registered_plugins;
874 my $t = Text::SimpleTable->new(74);
875 $t->row($_) for @plugins;
876 $class->log->debug( "Loaded plugins:\n" . $t->draw . "\n" );
879 my $dispatcher = $class->dispatcher;
880 my $engine = $class->engine;
881 my $home = $class->config->{home};
883 $class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
884 $class->log->debug(qq/Loaded engine "$engine"/);
888 ? $class->log->debug(qq/Found home "$home"/)
889 : $class->log->debug(qq/Home "$home" doesn't exist/)
890 : $class->log->debug(q/Couldn't find home/);
895 no warnings qw/redefine/;
896 local *setup = sub { };
900 # Initialize our data structure
901 $class->components( {} );
903 $class->setup_components;
905 if ( $class->debug ) {
906 my $t = Text::SimpleTable->new( [ 63, 'Class' ], [ 8, 'Type' ] );
907 for my $comp ( sort keys %{ $class->components } ) {
908 my $type = ref $class->components->{$comp} ? 'instance' : 'class';
909 $t->row( $comp, $type );
911 $class->log->debug( "Loaded components:\n" . $t->draw . "\n" )
912 if ( keys %{ $class->components } );
915 # Add our self to components, since we are also a component
916 $class->components->{$class} = $class;
918 $class->setup_actions;
920 if ( $class->debug ) {
921 my $name = $class->config->{name} || 'Application';
922 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
924 $class->log->_flush() if $class->log->can('_flush');
926 $class->setup_finished(1);
929 =head2 $c->uri_for( $path, @args?, \%query_values? )
931 Merges path with C<< $c->request->base >> for absolute URIs and with
932 C<< $c->namespace >> for relative URIs, then returns a normalized L<URI>
933 object. If any args are passed, they are added at the end of the path.
934 If the last argument to C<uri_for> is a hash reference, it is assumed to
935 contain GET parameter key/value pairs, which will be appended to the URI
938 Note that uri_for is destructive to the passed hashref. Subsequent calls
939 with the same hashref may have unintended results.
941 Instead of C<$path>, you can also optionally pass a C<$action> object
942 which will be resolved to a path using
943 C<< $c->dispatcher->uri_for_action >>; if the first element of
944 C<@args> is an arrayref it is treated as a list of captures to be passed
945 to C<uri_for_action>.
950 my ( $c, $path, @args ) = @_;
952 if ( Scalar::Util::blessed($path) ) { # action object
953 my $captures = ( scalar @args && ref $args[0] eq 'ARRAY'
956 $path = $c->dispatcher->uri_for_action($path, $captures);
957 return undef unless defined($path);
958 $path = '/' if $path eq '';
961 undef($path) if (defined $path && $path eq '');
964 ( scalar @args && ref $args[$#args] eq 'HASH' ? pop @args : {} );
966 carp "uri_for called with undef argument" if grep { ! defined $_ } @args;
967 s/([^$URI::uric])/$URI::Escape::escapes{$1}/go for @args;
969 unshift(@args, $path);
971 unless (defined $path && $path =~ s!^/!!) { # in-place strip
972 my $namespace = $c->namespace;
973 if (defined $path) { # cheesy hack to handle path '../foo'
974 $namespace =~ s{(?:^|/)[^/]+$}{} while $args[0] =~ s{^\.\./}{};
976 unshift(@args, $namespace || '');
979 # join args with '/', or a blank string
980 my $args = join('/', grep { defined($_) } @args);
981 $args =~ s/\?/%3F/g; # STUPID STUPID SPECIAL CASE
983 my $base = $c->req->base;
984 my $class = ref($base);
985 $base =~ s{(?<!/)$}{/};
989 if (my @keys = keys %$params) {
990 # somewhat lifted from URI::_query's query_form
991 $query = '?'.join('&', map {
992 s/([;\/?:@&=+,\$\[\]%])/$URI::Escape::escapes{$1}/go;
995 my $val = $params->{$_};
996 $val = '' unless defined $val;
999 utf8::encode( $_ ) if utf8::is_utf8($_);
1000 # using the URI::Escape pattern here so utf8 chars survive
1001 s/([^A-Za-z0-9\-_.!~*'() ])/$URI::Escape::escapes{$1}/go;
1003 "${key}=$_"; } ( ref $val eq 'ARRAY' ? @$val : $val ));
1007 my $res = bless(\"${base}${args}${query}", $class);
1011 =head2 $c->welcome_message
1013 Returns the Catalyst welcome HTML page.
1017 sub welcome_message {
1019 my $name = $c->config->{name};
1020 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
1021 my $prefix = Catalyst::Utils::appprefix( ref $c );
1022 $c->response->content_type('text/html; charset=utf-8');
1024 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
1025 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
1026 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
1028 <meta http-equiv="Content-Language" content="en" />
1029 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
1030 <title>$name on Catalyst $VERSION</title>
1031 <style type="text/css">
1034 background-color: #eee;
1041 margin-bottom: 10px;
1043 background-color: #ccc;
1044 border: 1px solid #aaa;
1049 font-family: verdana, tahoma, sans-serif;
1052 font-family: verdana, tahoma, sans-serif;
1055 text-decoration: none;
1057 border-bottom: 1px dotted #bbb;
1059 :link:hover, :visited:hover {
1072 background-color: #fff;
1073 border: 1px solid #aaa;
1077 font-weight: normal;
1099 <h1><span id="appname">$name</span> on <a href="http://catalyst.perl.org">Catalyst</a>
1104 <img src="$logo" alt="Catalyst Logo" />
1106 <p>Welcome to the world of Catalyst.
1107 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
1108 framework will make web development something you had
1109 never expected it to be: Fun, rewarding, and quick.</p>
1110 <h2>What to do now?</h2>
1111 <p>That really depends on what <b>you</b> want to do.
1112 We do, however, provide you with a few starting points.</p>
1113 <p>If you want to jump right into web development with Catalyst
1114 you might want want to start with a tutorial.</p>
1115 <pre>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Tutorial.pod">Catalyst::Manual::Tutorial</a></code>
1117 <p>Afterwards you can go on to check out a more complete look at our features.</p>
1119 <code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst-Manual/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
1120 <!-- Something else should go here, but the Catalyst::Manual link seems unhelpful -->
1122 <h2>What to do next?</h2>
1123 <p>Next it's time to write an actual application. Use the
1124 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
1125 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a>, and
1126 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>;
1127 they can save you a lot of work.</p>
1128 <pre><code>script/${prefix}_create.pl -help</code></pre>
1129 <p>Also, be sure to check out the vast and growing
1130 collection of <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3APlugin%3A%3A&mode=all">plugins for Catalyst on CPAN</a>;
1131 you are likely to find what you need there.
1135 <p>Catalyst has a very active community. Here are the main places to
1136 get in touch with us.</p>
1139 <a href="http://dev.catalyst.perl.org">Wiki</a>
1142 <a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
1145 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
1148 <h2>In conclusion</h2>
1149 <p>The Catalyst team hopes you will enjoy using Catalyst as much
1150 as we enjoyed making it. Please contact us if you have ideas
1151 for improvement or other feedback.</p>
1159 =head1 INTERNAL METHODS
1161 These methods are not meant to be used by end users.
1163 =head2 $c->components
1165 Returns a hash of components.
1167 =head2 $c->context_class
1169 Returns or sets the context class.
1173 Returns a hashref containing coderefs and execution counts (needed for
1174 deep recursion detection).
1178 Returns the number of actions on the current internal execution stack.
1182 Dispatches a request to actions.
1186 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
1188 =head2 $c->dispatcher_class
1190 Returns or sets the dispatcher class.
1192 =head2 $c->dump_these
1194 Returns a list of 2-element array references (name, structure) pairs
1195 that will be dumped on the error page in debug mode.
1201 [ Request => $c->req ],
1202 [ Response => $c->res ],
1203 [ Stash => $c->stash ],
1204 [ Config => $c->config ];
1207 =head2 $c->engine_class
1209 Returns or sets the engine class.
1211 =head2 $c->execute( $class, $coderef )
1213 Execute a coderef in given class and catch exceptions. Errors are available
1219 my ( $c, $class, $code ) = @_;
1220 $class = $c->component($class) || $class;
1223 if ( $c->depth >= $RECURSION ) {
1224 my $action = "$code";
1225 $action = "/$action" unless $action =~ /->/;
1226 my $error = qq/Deep recursion detected calling "$action"/;
1227 $c->log->error($error);
1233 my $stats_info = $c->_stats_start_execute( $code ) if $c->use_stats;
1235 push( @{ $c->stack }, $code );
1237 eval { $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 ) };
1239 $c->_stats_finish_execute( $stats_info ) if $c->use_stats and $stats_info;
1241 my $last = pop( @{ $c->stack } );
1243 if ( my $error = $@ ) {
1244 if ( !ref($error) and $error eq $DETACH ) { die $DETACH if $c->depth > 1 }
1246 unless ( ref $error ) {
1247 no warnings 'uninitialized';
1249 my $class = $last->class;
1250 my $name = $last->name;
1251 $error = qq/Caught exception in $class->$name "$error"/;
1260 sub _stats_start_execute {
1261 my ( $c, $code ) = @_;
1263 return if ( ( $code->name =~ /^_.*/ )
1264 && ( !$c->config->{show_internal_actions} ) );
1266 $c->counter->{"$code"}++;
1268 my $action = "$code";
1269 $action = "/$action" unless $action =~ /->/;
1271 # determine if the call was the result of a forward
1272 # this is done by walking up the call stack and looking for a calling
1273 # sub of Catalyst::forward before the eval
1275 for my $index ( 2 .. 11 ) {
1277 if ( ( caller($index) )[0] eq 'Catalyst'
1278 && ( caller($index) )[3] eq '(eval)' );
1280 if ( ( caller($index) )[3] =~ /forward$/ ) {
1281 $callsub = ( caller($index) )[3];
1282 $action = "-> $action";
1287 my $uid = "$code" . $c->counter->{"$code"};
1289 # is this a root-level call or a forwarded call?
1290 if ( $callsub =~ /forward$/ ) {
1292 # forward, locate the caller
1293 if ( my $parent = $c->stack->[-1] ) {
1296 parent => "$parent" . $c->counter->{"$parent"},
1302 # forward with no caller may come from a plugin
1321 sub _stats_finish_execute {
1322 my ( $c, $info ) = @_;
1323 $c->stats->profile( end => $info );
1326 =head2 $c->_localize_fields( sub { }, \%keys );
1330 #Why does this exist? This is no longer safe and WILL NOT WORK.
1331 # it doesnt seem to be used anywhere. can we remove it?
1332 sub _localize_fields {
1333 my ( $c, $localized, $code ) = ( @_ );
1335 my $request = delete $localized->{request} || {};
1336 my $response = delete $localized->{response} || {};
1338 local @{ $c }{ keys %$localized } = values %$localized;
1339 local @{ $c->request }{ keys %$request } = values %$request;
1340 local @{ $c->response }{ keys %$response } = values %$response;
1347 Finalizes the request.
1354 for my $error ( @{ $c->error } ) {
1355 $c->log->error($error);
1358 # Allow engine to handle finalize flow (for POE)
1359 my $engine = $c->engine;
1360 if ( my $code = $engine->can('finalize') ) {
1365 $c->finalize_uploads;
1368 if ( $#{ $c->error } >= 0 ) {
1372 $c->finalize_headers;
1375 if ( $c->request->method eq 'HEAD' ) {
1376 $c->response->body('');
1382 if ($c->use_stats) {
1383 my $elapsed = sprintf '%f', $c->stats->elapsed;
1384 my $av = $elapsed == 0 ? '??' : sprintf '%.3f', 1 / $elapsed;
1386 "Request took ${elapsed}s ($av/s)\n" . $c->stats->report . "\n" );
1389 return $c->response->status;
1392 =head2 $c->finalize_body
1398 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
1400 =head2 $c->finalize_cookies
1406 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
1408 =head2 $c->finalize_error
1414 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
1416 =head2 $c->finalize_headers
1422 sub finalize_headers {
1425 my $response = $c->response; #accessor calls can add up?
1427 # Moose TODO: Maybe this should be an attribute too?
1428 # Check if we already finalized headers
1429 return if $response->{_finalized_headers};
1432 if ( my $location = $response->redirect ) {
1433 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
1434 $response->header( Location => $location );
1436 #Moose TODO: we should probably be using a predicate method here ?
1437 if ( !$response->body ) {
1438 # Add a default body if none is already present
1440 qq{<html><body><p>This item has moved <a href="$location">here</a>.</p></body></html>}
1446 if ( $response->body && !$response->content_length ) {
1448 # get the length from a filehandle
1449 if ( blessed( $response->body ) && $response->body->can('read') )
1451 my $stat = stat $response->body;
1452 if ( $stat && $stat->size > 0 ) {
1453 $response->content_length( $stat->size );
1456 $c->log->warn('Serving filehandle without a content-length');
1460 # everything should be bytes at this point, but just in case
1461 $response->content_length( bytes::length( $response->body ) );
1466 if ( $response->status =~ /^(1\d\d|[23]04)$/ ) {
1467 $response->headers->remove_header("Content-Length");
1468 $response->body('');
1471 $c->finalize_cookies;
1473 $c->engine->finalize_headers( $c, @_ );
1476 $response->{_finalized_headers} = 1;
1479 =head2 $c->finalize_output
1481 An alias for finalize_body.
1483 =head2 $c->finalize_read
1485 Finalizes the input after reading is complete.
1489 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
1491 =head2 $c->finalize_uploads
1493 Finalizes uploads. Cleans up any temporary files.
1497 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
1499 =head2 $c->get_action( $action, $namespace )
1501 Gets an action in a given namespace.
1505 sub get_action { my $c = shift; $c->dispatcher->get_action(@_) }
1507 =head2 $c->get_actions( $action, $namespace )
1509 Gets all actions of a given name in a namespace and all parent
1514 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
1516 =head2 $c->handle_request( $class, @arguments )
1518 Called to handle each HTTP request.
1522 sub handle_request {
1523 my ( $class, @arguments ) = @_;
1525 # Always expect worst case!
1528 if ($class->debug) {
1529 my $secs = time - $START || 1;
1530 my $av = sprintf '%.3f', $COUNT / $secs;
1531 my $time = localtime time;
1532 $class->log->info("*** Request $COUNT ($av/s) [$$] [$time] ***");
1535 my $c = $class->prepare(@arguments);
1537 $status = $c->finalize;
1540 if ( my $error = $@ ) {
1542 $class->log->error(qq/Caught exception in engine "$error"/);
1546 $class->log->_flush() if $class->log->can('_flush');
1550 =head2 $c->prepare( @arguments )
1552 Creates a Catalyst context from an engine-specific request (Apache, CGI,
1558 my ( $class, @arguments ) = @_;
1560 $class->context_class( ref $class || $class ) unless $class->context_class;
1561 #Moose TODO: if we make empty containers the defaults then that can be
1562 #handled by the context class itself instead of having this here
1563 my $c = $class->context_class->new(
1567 request => $class->request_class->new(
1570 body_parameters => {},
1572 headers => HTTP::Headers->new,
1574 query_parameters => {},
1580 response => $class->response_class->new(
1584 headers => HTTP::Headers->new(),
1593 $c->stats($class->stats_class->new)->enable($c->use_stats);
1595 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1598 # For on-demand data
1599 $c->request->_context($c);
1600 $c->response->_context($c);
1602 #XXX reuse coderef from can
1603 # Allow engine to direct the prepare flow (for POE)
1604 if ( $c->engine->can('prepare') ) {
1605 $c->engine->prepare( $c, @arguments );
1608 $c->prepare_request(@arguments);
1609 $c->prepare_connection;
1610 $c->prepare_query_parameters;
1611 $c->prepare_headers;
1612 $c->prepare_cookies;
1615 # Prepare the body for reading, either by prepare_body
1616 # or the user, if they are using $c->read
1619 # Parse the body unless the user wants it on-demand
1620 unless ( $c->config->{parse_on_demand} ) {
1625 my $method = $c->req->method || '';
1626 my $path = $c->req->path || '/';
1627 my $address = $c->req->address || '';
1629 $c->log->debug(qq/"$method" request for "$path" from "$address"/)
1637 =head2 $c->prepare_action
1639 Prepares action. See L<Catalyst::Dispatcher>.
1643 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1645 =head2 $c->prepare_body
1647 Prepares message body.
1654 #Moose TODO: what is _body ??
1655 # Do we run for the first time?
1656 return if defined $c->request->{_body};
1658 # Initialize on-demand data
1659 $c->engine->prepare_body( $c, @_ );
1660 $c->prepare_parameters;
1661 $c->prepare_uploads;
1663 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1664 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1665 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1666 my $param = $c->req->body_parameters->{$key};
1667 my $value = defined($param) ? $param : '';
1669 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1671 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1675 =head2 $c->prepare_body_chunk( $chunk )
1677 Prepares a chunk of data before sending it to L<HTTP::Body>.
1679 See L<Catalyst::Engine>.
1683 sub prepare_body_chunk {
1685 $c->engine->prepare_body_chunk( $c, @_ );
1688 =head2 $c->prepare_body_parameters
1690 Prepares body parameters.
1694 sub prepare_body_parameters {
1696 $c->engine->prepare_body_parameters( $c, @_ );
1699 =head2 $c->prepare_connection
1701 Prepares connection.
1705 sub prepare_connection {
1707 $c->engine->prepare_connection( $c, @_ );
1710 =head2 $c->prepare_cookies
1716 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1718 =head2 $c->prepare_headers
1724 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1726 =head2 $c->prepare_parameters
1728 Prepares parameters.
1732 sub prepare_parameters {
1734 $c->prepare_body_parameters;
1735 $c->engine->prepare_parameters( $c, @_ );
1738 =head2 $c->prepare_path
1740 Prepares path and base.
1744 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
1746 =head2 $c->prepare_query_parameters
1748 Prepares query parameters.
1752 sub prepare_query_parameters {
1755 $c->engine->prepare_query_parameters( $c, @_ );
1757 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
1758 my $t = Text::SimpleTable->new( [ 35, 'Parameter' ], [ 36, 'Value' ] );
1759 for my $key ( sort keys %{ $c->req->query_parameters } ) {
1760 my $param = $c->req->query_parameters->{$key};
1761 my $value = defined($param) ? $param : '';
1763 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1765 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1769 =head2 $c->prepare_read
1771 Prepares the input for reading.
1775 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1777 =head2 $c->prepare_request
1779 Prepares the engine request.
1783 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1785 =head2 $c->prepare_uploads
1791 sub prepare_uploads {
1794 $c->engine->prepare_uploads( $c, @_ );
1796 if ( $c->debug && keys %{ $c->request->uploads } ) {
1797 my $t = Text::SimpleTable->new(
1798 [ 12, 'Parameter' ],
1803 for my $key ( sort keys %{ $c->request->uploads } ) {
1804 my $upload = $c->request->uploads->{$key};
1805 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1806 $t->row( $key, $u->filename, $u->type, $u->size );
1809 $c->log->debug( "File Uploads are:\n" . $t->draw );
1813 =head2 $c->prepare_write
1815 Prepares the output for writing.
1819 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1821 =head2 $c->request_class
1823 Returns or sets the request class.
1825 =head2 $c->response_class
1827 Returns or sets the response class.
1829 =head2 $c->read( [$maxlength] )
1831 Reads a chunk of data from the request body. This method is designed to
1832 be used in a while loop, reading C<$maxlength> bytes on every call.
1833 C<$maxlength> defaults to the size of the request if not specified.
1835 You have to set C<< MyApp->config->{parse_on_demand} >> to use this
1838 Warning: If you use read(), Catalyst will not process the body,
1839 so you will not be able to access POST parameters or file uploads via
1840 $c->request. You must handle all body parsing yourself.
1844 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1852 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1854 =head2 $c->set_action( $action, $code, $namespace, $attrs )
1856 Sets an action in a given namespace.
1860 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1862 =head2 $c->setup_actions($component)
1864 Sets up actions for a component.
1868 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1870 =head2 $c->setup_components
1872 Sets up components. Specify a C<setup_components> config option to pass
1873 additional options directly to L<Module::Pluggable>. To add additional
1874 search paths, specify a key named C<search_extra> as an array
1875 reference. Items in the array beginning with C<::> will have the
1876 application class name prepended to them.
1880 sub setup_components {
1883 my @paths = qw( ::Controller ::C ::Model ::M ::View ::V );
1884 my $config = $class->config->{ setup_components };
1885 my $extra = delete $config->{ search_extra } || [];
1887 push @paths, @$extra;
1889 my $locator = Module::Pluggable::Object->new(
1890 search_path => [ map { s/^(?=::)/$class/; $_; } @paths ],
1894 my @comps = sort { length $a <=> length $b } $locator->plugins;
1895 my %comps = map { $_ => 1 } @comps;
1897 for my $component ( @comps ) {
1899 # We pass ignore_loaded here so that overlay files for (e.g.)
1900 # Model::DBI::Schema sub-classes are loaded - if it's in @comps
1901 # we know M::P::O found a file on disk so this is safe
1903 #Catalyst::Utils::ensure_class_loaded( $component, { ignore_loaded => 1 } );
1904 Class::MOP::load_class($component);
1906 my $module = $class->setup_component( $component );
1908 $component => $module,
1910 $_ => $class->setup_component( $_ )
1912 not exists $comps{$_}
1913 } Devel::InnerPackage::list_packages( $component )
1916 for my $key ( keys %modules ) {
1917 $class->components->{ $key } = $modules{ $key };
1922 =head2 $c->setup_component
1926 sub setup_component {
1927 my( $class, $component ) = @_;
1929 unless ( $component->can( 'COMPONENT' ) ) {
1933 my $suffix = Catalyst::Utils::class2classsuffix( $component );
1934 my $config = $class->config->{ $suffix } || {};
1936 my $instance = eval { $component->COMPONENT( $class, $config ); };
1938 if ( my $error = $@ ) {
1940 Catalyst::Exception->throw(
1941 message => qq/Couldn't instantiate component "$component", "$error"/
1945 Catalyst::Exception->throw(
1947 qq/Couldn't instantiate component "$component", "COMPONENT() didn't return an object-like value"/
1948 ) unless eval { $instance->can( 'can' ) };
1953 =head2 $c->setup_dispatcher
1959 sub setup_dispatcher {
1960 my ( $class, $dispatcher ) = @_;
1963 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1966 if ( my $env = Catalyst::Utils::env_value( $class, 'DISPATCHER' ) ) {
1967 $dispatcher = 'Catalyst::Dispatcher::' . $env;
1970 unless ($dispatcher) {
1971 $dispatcher = $class->dispatcher_class;
1974 Class::MOP::load_class($dispatcher);
1975 #unless (Class::Inspector->loaded($dispatcher)) {
1976 # require Class::Inspector->filename($dispatcher);
1979 # dispatcher instance
1980 $class->dispatcher( $dispatcher->new );
1983 =head2 $c->setup_engine
1990 my ( $class, $engine ) = @_;
1993 $engine = 'Catalyst::Engine::' . $engine;
1996 if ( my $env = Catalyst::Utils::env_value( $class, 'ENGINE' ) ) {
1997 $engine = 'Catalyst::Engine::' . $env;
2000 if ( $ENV{MOD_PERL} ) {
2002 # create the apache method
2005 *{"$class\::apache"} = sub { shift->engine->apache };
2008 my ( $software, $version ) =
2009 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
2012 $version =~ s/(\.[^.]+)\./$1/g;
2014 if ( $software eq 'mod_perl' ) {
2018 if ( $version >= 1.99922 ) {
2019 $engine = 'Catalyst::Engine::Apache2::MP20';
2022 elsif ( $version >= 1.9901 ) {
2023 $engine = 'Catalyst::Engine::Apache2::MP19';
2026 elsif ( $version >= 1.24 ) {
2027 $engine = 'Catalyst::Engine::Apache::MP13';
2031 Catalyst::Exception->throw( message =>
2032 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
2037 # install the correct mod_perl handler
2038 if ( $version >= 1.9901 ) {
2039 *handler = sub : method {
2040 shift->handle_request(@_);
2044 *handler = sub ($$) { shift->handle_request(@_) };
2049 elsif ( $software eq 'Zeus-Perl' ) {
2050 $engine = 'Catalyst::Engine::Zeus';
2054 Catalyst::Exception->throw(
2055 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
2060 $engine = $class->engine_class;
2063 Class::MOP::load_class($engine);
2064 #unless (Class::Inspector->loaded($engine)) {
2065 # require Class::Inspector->filename($engine);
2068 # check for old engines that are no longer compatible
2070 if ( $engine->isa('Catalyst::Engine::Apache')
2071 && !Catalyst::Engine::Apache->VERSION )
2076 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
2077 && Catalyst::Engine::Server->VERSION le '0.02' )
2082 elsif ($engine->isa('Catalyst::Engine::HTTP::POE')
2083 && $engine->VERSION eq '0.01' )
2088 elsif ($engine->isa('Catalyst::Engine::Zeus')
2089 && $engine->VERSION eq '0.01' )
2095 Catalyst::Exception->throw( message =>
2096 qq/Engine "$engine" is not supported by this version of Catalyst/
2101 $class->engine( $engine->new );
2104 =head2 $c->setup_home
2106 Sets up the home directory.
2111 my ( $class, $home ) = @_;
2113 if ( my $env = Catalyst::Utils::env_value( $class, 'HOME' ) ) {
2118 $home = Catalyst::Utils::home($class);
2121 #I remember recently being scolded for assigning config values like this
2123 #I remember recently being scolded for assigning config values like this
2124 $class->config->{home} ||= $home;
2125 $class->config->{root} ||= Path::Class::Dir->new($home)->subdir('root');
2129 =head2 $c->setup_log
2136 my ( $class, $debug ) = @_;
2138 unless ( $class->log ) {
2139 $class->log( Catalyst::Log->new );
2142 my $env_debug = Catalyst::Utils::env_value( $class, 'DEBUG' );
2143 if ( defined($env_debug) ? $env_debug : $debug ) {
2145 #Moose todo: dying to be made a bool attribute
2146 *{"$class\::debug"} = sub { 1 };
2147 $class->log->debug('Debug messages enabled');
2151 =head2 $c->setup_plugins
2157 =head2 $c->setup_stats
2159 Sets up timing statistics class.
2164 my ( $class, $stats ) = @_;
2166 Catalyst::Utils::ensure_class_loaded($class->stats_class);
2168 my $env = Catalyst::Utils::env_value( $class, 'STATS' );
2169 if ( defined($env) ? $env : ($stats || $class->debug ) ) {
2171 #Moose todo: dying to be made a bool attribute
2172 *{"$class\::use_stats"} = sub { 1 };
2173 $class->log->debug('Statistics enabled');
2178 =head2 $c->registered_plugins
2180 Returns a sorted list of the plugins which have either been stated in the
2181 import list or which have been added via C<< MyApp->plugin(@args); >>.
2183 If passed a given plugin name, it will report a boolean value indicating
2184 whether or not that plugin is loaded. A fully qualified name is required if
2185 the plugin name does not begin with C<Catalyst::Plugin::>.
2187 if ($c->registered_plugins('Some::Plugin')) {
2195 sub registered_plugins {
2197 return sort keys %{ $proto->_plugins } unless @_;
2199 return 1 if exists $proto->_plugins->{$plugin};
2200 return exists $proto->_plugins->{"Catalyst::Plugin::$plugin"};
2203 sub _register_plugin {
2204 my ( $proto, $plugin, $instant ) = @_;
2205 my $class = ref $proto || $proto;
2207 # no ignore_loaded here, the plugin may already have been
2208 # defined in memory and we don't want to error on "no file" if so
2210 Catalyst::Utils::ensure_class_loaded( $plugin );
2212 $proto->_plugins->{$plugin} = 1;
2215 if( $class->can('meta') ){
2216 my @superclasses = ($plugin, $class->meta->superclasses );
2217 $class->meta->superclasses(@superclasses);
2219 unshift @{"$class\::ISA"}, $plugin;
2226 my ( $class, $plugins ) = @_;
2228 $class->_plugins( {} ) unless $class->_plugins;
2230 for my $plugin ( reverse @$plugins ) {
2232 unless ( $plugin =~ s/\A\+// ) {
2233 $plugin = "Catalyst::Plugin::$plugin";
2236 $class->_register_plugin($plugin);
2243 Returns an arrayref of the internal execution stack (actions that are
2244 currently executing).
2246 =head2 $c->stats_class
2248 Returns or sets the stats (timing statistics) class.
2250 =head2 $c->use_stats
2252 Returns 1 when stats collection is enabled. Stats collection is enabled
2253 when the -Stats options is set, debug is on or when the <MYAPP>_STATS
2254 environment variable is set.
2256 Note that this is a static method, not an accessor and should be overloaded
2257 by declaring "sub use_stats { 1 }" in your MyApp.pm, not by calling $c->use_stats(1).
2264 =head2 $c->write( $data )
2266 Writes $data to the output stream. When using this method directly, you
2267 will need to manually set the C<Content-Length> header to the length of
2268 your output data, if known.
2275 # Finalize headers if someone manually writes output
2276 $c->finalize_headers;
2278 return $c->engine->write( $c, @_ );
2283 Returns the Catalyst version number. Mostly useful for "powered by"
2284 messages in template systems.
2288 sub version { return $Catalyst::VERSION }
2290 =head1 INTERNAL ACTIONS
2292 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>,
2293 C<_ACTION>, and C<_END>. These are by default not shown in the private
2294 action table, but you can make them visible with a config parameter.
2296 MyApp->config->{show_internal_actions} = 1;
2298 =head1 CASE SENSITIVITY
2300 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> is
2301 mapped to C</foo/bar>. You can activate case sensitivity with a config
2304 MyApp->config->{case_sensitive} = 1;
2306 This causes C<MyApp::C::Foo::Bar> to map to C</Foo/Bar>.
2308 =head1 ON-DEMAND PARSER
2310 The request body is usually parsed at the beginning of a request,
2311 but if you want to handle input yourself, you can enable on-demand
2312 parsing with a config parameter.
2314 MyApp->config->{parse_on_demand} = 1;
2316 =head1 PROXY SUPPORT
2318 Many production servers operate using the common double-server approach,
2319 with a lightweight frontend web server passing requests to a larger
2320 backend server. An application running on the backend server must deal
2321 with two problems: the remote user always appears to be C<127.0.0.1> and
2322 the server's hostname will appear to be C<localhost> regardless of the
2323 virtual host that the user connected through.
2325 Catalyst will automatically detect this situation when you are running
2326 the frontend and backend servers on the same machine. The following
2327 changes are made to the request.
2329 $c->req->address is set to the user's real IP address, as read from
2330 the HTTP X-Forwarded-For header.
2332 The host value for $c->req->base and $c->req->uri is set to the real
2333 host, as read from the HTTP X-Forwarded-Host header.
2335 Obviously, your web server must support these headers for this to work.
2337 In a more complex server farm environment where you may have your
2338 frontend proxy server(s) on different machines, you will need to set a
2339 configuration option to tell Catalyst to read the proxied data from the
2342 MyApp->config->{using_frontend_proxy} = 1;
2344 If you do not wish to use the proxy support at all, you may set:
2346 MyApp->config->{ignore_frontend_proxy} = 1;
2348 =head1 THREAD SAFETY
2350 Catalyst has been tested under Apache 2's threading C<mpm_worker>,
2351 C<mpm_winnt>, and the standalone forking HTTP server on Windows. We
2352 believe the Catalyst core to be thread-safe.
2354 If you plan to operate in a threaded environment, remember that all other
2355 modules you are using must also be thread-safe. Some modules, most notably
2356 L<DBD::SQLite>, are not thread-safe.
2362 Join #catalyst on irc.perl.org.
2366 http://lists.rawmode.org/mailman/listinfo/catalyst
2367 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
2371 http://catalyst.perl.org
2375 http://dev.catalyst.perl.org
2379 =head2 L<Task::Catalyst> - All you need to start with Catalyst
2381 =head2 L<Catalyst::Manual> - The Catalyst Manual
2383 =head2 L<Catalyst::Component>, L<Catalyst::Base> - Base classes for components
2385 =head2 L<Catalyst::Engine> - Core engine
2387 =head2 L<Catalyst::Log> - Log class.
2389 =head2 L<Catalyst::Request> - Request object
2391 =head2 L<Catalyst::Response> - Response object
2393 =head2 L<Catalyst::Test> - The test suite.
2467 Sebastian Riedel, C<sri@oook.de>
2471 This library is free software, you can redistribute it and/or modify it under
2472 the same terms as Perl itself.