4 use base 'Catalyst::Base';
6 use UNIVERSAL::require;
7 use Catalyst::Exception;
10 use Catalyst::Request::Upload;
11 use Catalyst::Response;
16 use Time::HiRes qw/gettimeofday tv_interval/;
18 use Scalar::Util qw/weaken/;
20 __PACKAGE__->mk_accessors(qw/counter depth request response state/);
27 # For backwards compatibility
28 *finalize_output = \&finalize_body;
33 our $RECURSION = 1000;
34 our $DETACH = "catalyst_detach\n";
36 require Module::Pluggable::Fast;
38 # Helper script generation
39 our $CATALYST_SCRIPT_GEN = 8;
41 __PACKAGE__->mk_classdata($_)
42 for qw/components arguments dispatcher engine log/;
44 our $VERSION = '5.49_01';
47 my ( $class, @arguments ) = @_;
49 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
51 return unless $class eq 'Catalyst';
53 my $caller = caller(0);
55 unless ( $caller->isa('Catalyst') ) {
57 push @{"$caller\::ISA"}, $class;
60 $caller->arguments( [@arguments] );
66 Catalyst - The Elegant MVC Web Application Framework
70 # use the helper to start a new application
74 # add models, views, controllers
75 script/myapp_create.pl model Something
76 script/myapp_create.pl view Stuff
77 script/myapp_create.pl controller Yada
80 script/myapp_server.pl
82 # command line interface
83 script/myapp_test.pl /yada
88 use Catalyst qw/My::Module My::OtherModule/;
90 use Catalyst '-Debug';
92 use Catalyst qw/-Debug -Engine=CGI/;
94 sub default : Private { $_[1]->res->output('Hello') } );
96 sub index : Path('/index.html') {
97 my ( $self, $c ) = @_;
98 $c->res->output('Hello');
102 sub product : Regex('^product[_]*(\d*).html$') {
103 my ( $self, $c ) = @_;
104 $c->stash->{template} = 'product.tt';
105 $c->stash->{product} = $c->req->snippets->[0];
108 See also L<Catalyst::Manual::Intro>
112 The key concept of Catalyst is DRY (Don't Repeat Yourself).
114 See L<Catalyst::Manual> for more documentation.
116 Catalyst plugins can be loaded by naming them as arguments to the "use Catalyst" statement.
117 Omit the C<Catalyst::Plugin::> prefix from the plugin name,
118 so C<Catalyst::Plugin::My::Module> becomes C<My::Module>.
120 use Catalyst 'My::Module';
122 Special flags like -Debug and -Engine can also be specified as arguments when
125 use Catalyst qw/-Debug My::Module/;
127 The position of plugins and flags in the chain is important, because they are
128 loaded in exactly the order that they appear.
130 The following flags are supported:
136 enables debug output, i.e.:
138 use Catalyst '-Debug';
140 this is equivalent to:
147 Force Catalyst to use a specific dispatcher.
151 Force Catalyst to use a specific engine.
152 Omit the C<Catalyst::Engine::> prefix of the engine name, i.e.:
154 use Catalyst '-Engine=CGI';
158 Force Catalyst to use a specific home directory.
170 =item $c->comp($name)
172 =item $c->component($name)
174 Get a component object by name.
176 $c->comp('MyApp::Model::MyModel')->do_stuff;
187 my $appclass = ref $c || $c;
190 $name, "${appclass}::${name}",
191 map { "${appclass}::${_}::${name}" } qw/M V C/
194 foreach my $try (@names) {
196 if ( exists $c->components->{$try} ) {
198 return $c->components->{$try};
202 foreach my $component ( keys %{ $c->components } ) {
204 return $c->components->{$component} if $component =~ /$name/i;
209 return sort keys %{ $c->components };
214 Returns a hashref containing your applications settings.
218 Overload to enable debug messages.
224 =item $c->detach( $command [, \@arguments ] )
226 Like C<forward> but doesn't return.
230 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
234 Contains the dispatcher instance.
235 Stringifies to class.
237 =item $c->forward( $command [, \@arguments ] )
239 Forward processing to a private action or a method from a class.
240 If you define a class without method it will default to process().
241 also takes an optional arrayref containing arguments to be passed
242 to the new function. $c->req->args will be reset upon returning
246 $c->forward('index');
247 $c->forward(qw/MyApp::Model::CDBI::Foo do_stuff/);
248 $c->forward('MyApp::View::TT');
252 sub forward { my $c = shift; $c->dispatcher->forward( $c, @_ ) }
263 my ( $class, @arguments ) = @_;
265 unless ( $class->isa('Catalyst') ) {
267 Catalyst::Exception->throw(
268 message => qq/'$class' does not inherit from Catalyst/ );
271 if ( $class->arguments ) {
272 @arguments = ( @arguments, @{ $class->arguments } );
278 foreach (@arguments) {
282 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
284 elsif (/^-(\w+)=?(.*)$/) {
285 $flags->{ lc $1 } = $2;
288 push @{ $flags->{plugins} }, $_;
292 $class->setup_log( delete $flags->{log} );
293 $class->setup_plugins( delete $flags->{plugins} );
294 $class->setup_dispatcher( delete $flags->{dispatcher} );
295 $class->setup_engine( delete $flags->{engine} );
296 $class->setup_home( delete $flags->{home} );
298 for my $flag ( sort keys %{$flags} ) {
300 if ( my $code = $class->can( 'setup_' . $flag ) ) {
301 &$code( $class, delete $flags->{$flag} );
304 $class->log->warn(qq/Unknown flag "$flag"/);
308 $class->log->warn( "You are running an old helper script! "
309 . "Please update your scripts by regenerating the "
310 . "application and copying over the new scripts." )
311 if ( $ENV{CATALYST_SCRIPT_GEN}
312 && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::CATALYST_SCRIPT_GEN ) );
314 if ( $class->debug ) {
320 @plugins = grep { /^Catalyst::Plugin/ } @{"$class\::ISA"};
324 my $t = Text::ASCIITable->new;
325 $t->setOptions( 'hide_HeadRow', 1 );
326 $t->setOptions( 'hide_HeadLine', 1 );
327 $t->setCols('Class');
328 $t->setColWidth( 'Class', 75, 1 );
329 $t->addRow($_) for @plugins;
330 $class->log->debug( "Loaded plugins:\n" . $t->draw );
333 my $dispatcher = $class->dispatcher;
334 my $engine = $class->engine;
335 my $home = $class->config->{home};
337 $class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
338 $class->log->debug(qq/Loaded engine "$engine"/);
342 ? $class->log->debug(qq/Found home "$home"/)
343 : $class->log->debug(qq/Home "$home" doesn't exist/)
344 : $class->log->debug(q/Couldn't find home/);
349 no warnings qw/redefine/;
350 local *setup = sub { };
354 # Initialize our data structure
355 $class->components( {} );
357 $class->setup_components;
359 if ( $class->debug ) {
360 my $t = Text::ASCIITable->new;
361 $t->setOptions( 'hide_HeadRow', 1 );
362 $t->setOptions( 'hide_HeadLine', 1 );
363 $t->setCols('Class');
364 $t->setColWidth( 'Class', 75, 1 );
365 $t->addRow($_) for sort keys %{ $class->components };
366 $class->log->debug( "Loaded components:\n" . $t->draw )
367 if ( @{ $t->{tbl_rows} } );
370 # Add our self to components, since we are also a component
371 $class->components->{$class} = $class;
373 $class->setup_actions;
375 if ( $class->debug ) {
376 my $name = $class->config->{name} || 'Application';
377 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
379 $class->log->_flush() if $class->log->can('_flush');
382 =item $c->uri_for($path)
384 Merges path with $c->request->base for absolute uri's and with
385 $c->request->match for relative uri's, then returns a normalized
391 my ( $c, $path ) = @_;
392 my $base = $c->request->base->clone;
393 my $basepath = $base->path;
394 $basepath =~ s/\/$//;
396 my $match = $c->request->match;
398 $match .= '/' if $match;
399 $match = '' if $path =~ /^\//;
401 return URI->new_abs( URI->new_abs( $path, "$basepath$match" ), $base )
407 =item $c->error($error, ...)
409 =item $c->error($arrayref)
411 Returns an arrayref containing error messages.
413 my @error = @{ $c->error };
417 $c->error('Something bad happened');
423 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
424 push @{ $c->{error} }, @$error;
430 Contains the engine instance.
431 Stringifies to the class.
435 Contains the logging object. Unless it is already set Catalyst sets this up with a
436 C<Catalyst::Log> object. To use your own log class:
438 $c->log( MyLogger->new );
439 $c->log->info("now logging with my own logger!");
441 Your log class should implement the methods described in the C<Catalyst::Log>
444 =item $c->plugin( $name, $class, @args )
446 Instant plugins for Catalyst.
447 Classdata accessor/mutator will be created, class loaded and instantiated.
449 MyApp->plugin( 'prototype', 'HTML::Prototype' );
451 $c->prototype->define_javascript_functions;
456 my ( $class, $name, $plugin, @args ) = @_;
459 if ( my $error = $UNIVERSAL::require::ERROR ) {
460 Catalyst::Exception->throw(
461 message => qq/Couldn't load instant plugin "$plugin", "$error"/ );
464 eval { $plugin->import };
465 $class->mk_classdata($name);
467 eval { $obj = $plugin->new(@args) };
470 Catalyst::Exception->throw( message =>
471 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
475 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
483 Returns a C<Catalyst::Request> object.
491 Returns a C<Catalyst::Response> object.
497 Contains the return value of the last executed action.
501 Returns a hashref containing all your data.
503 print $c->stash->{foo};
505 Keys may be set in the stash by assigning to the hash reference, or by passing
506 either a single hash reference or a list of key/value pairs as arguments.
510 $c->stash->{foo} ||= 'yada';
511 $c->stash( { moose => 'majestic', qux => 0 } );
512 $c->stash( bar => 1, gorch => 2 );
519 my $stash = @_ > 1 ? {@_} : $_[0];
520 while ( my ( $key, $val ) = each %$stash ) {
521 $c->{stash}->{$key} = $val;
527 =head1 $c->welcome_message
529 Returns the Catalyst welcome HTML page.
533 sub welcome_message {
535 my $name = $c->config->{name};
539 <title>$name on Catalyst $VERSION</title>
540 <style type="text/css">
545 background-color: #eee;
553 background-color: #ccc;
554 border: 1px solid #aaa;
555 -moz-border-radius: 10px;
560 font-family: verdana, tahoma, sans-serif;
563 text-decoration: none;
565 border-bottom: 1px dotted #bbb;
567 :link:hover, :visited:hover {
568 background-color: #fff;
575 border: 1px dotted #555;
582 background-color: #fff;
583 border: 1px solid #aaa;
584 -moz-border-radius: 10px;
605 <h1>$name on Catalyst $VERSION</h1>
608 <p>Welcome to the wonderful world of Catalyst.
609 This MVC framework will make web development
610 something you had never expected it to be:
611 Fun, rewarding and quick.</p>
612 <h2>What to do now?</h2>
613 <p>That really depends on what <b>you</b> want to do.
614 We do, however, provide you with a few starting points.</p>
615 <p>If you want to jump right into web development with Catalyst
616 you might want to check out the documentation.</p>
617 <pre><code>perldoc<a href="http://cpansearch.perl.org/dist/Catalyst/lib/Catalyst/Manual.pod">Catalyst::Manual</a>
618 perldoc<a href="http://cpansearch.perl.org/dist/Catalyst/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a></code></pre>
619 <p>If you would like some background information on the
620 MVC-pattern, these links might be of help to you.</p>
623 <a href="http://dev.catalyst.perl.org/wiki/Models">
624 Introduction to Models
628 <a href="http://dev.catalyst.perl.org/wiki/Views">
629 Introduction to Views
633 <a href="http://dev.catalyst.perl.org/wiki/Controllers">
634 Introduction to Controllers
638 <h2>What to do next?</h2>
639 <p>Next you need to create an actual application. Use the
640 helper scripts for what they are worth, they can save you
641 a lot of work getting everything set up. Also, be sure to
642 check out the vast array of plugins for Catalyst on CPAN.
643 They can handle everything from A to Z
644 , and a whole lot in between.</p>
646 <p>Catalyst has a very active community. The main places to get
647 in touch are these.</p>
650 <a href="http://dev.catalyst.perl.org">Wiki</a>
653 <a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
656 <a href="irc://irc.perl.org/catalyst">IRC channel</a>
659 <h2>In conclusion</h2>
660 <p>The Catalyst team hope you will enjoy using Catalyst as much
661 as we enjoyed making it, and rest assured that any and all
662 feedback is welcomed</p>
663 <p class="signature">-- #1. the first rule of the Cabal is, you do not
664 talk about the Cabal.<br/>
665 #2. the second rule of the Cabal is, you DO NOT
666 talkk about the Cabal.</p>
676 =head1 INTERNAL METHODS
680 =item $c->benchmark($coderef)
682 Takes a coderef with arguments and returns elapsed time as float.
684 my ( $elapsed, $status ) = $c->benchmark( sub { return 1 } );
685 $c->log->info( sprintf "Processing took %f seconds", $elapsed );
692 my $time = [gettimeofday];
693 my @return = &$code(@_);
694 my $elapsed = tv_interval $time;
695 return wantarray ? ( $elapsed, @return ) : $elapsed;
700 Contains the components.
704 Returns a hashref containing coderefs and execution counts.
705 (Needed for deep recursion detection)
709 Returns the actual forward depth.
713 Dispatch request to actions.
717 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
719 =item $c->execute($class, $coderef)
721 Execute a coderef in given class and catch exceptions.
722 Errors are available via $c->error.
727 my ( $c, $class, $code ) = @_;
728 $class = $c->components->{$class} || $class;
730 my $callsub = ( caller(1) )[3];
735 $action = "/$action" unless $action =~ /\-\>/;
736 $c->counter->{"$code"}++;
738 if ( $c->counter->{"$code"} > $RECURSION ) {
739 my $error = qq/Deep recursion detected in "$action"/;
740 $c->log->error($error);
746 $action = "-> $action" if $callsub =~ /forward$/;
752 my ( $elapsed, @state ) =
753 $c->benchmark( $code, $class, $c, @{ $c->req->args } );
754 push @{ $c->{stats} }, [ $action, sprintf( '%fs', $elapsed ) ];
757 else { $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 ) }
761 if ( my $error = $@ ) {
763 if ( $error eq $DETACH ) { die $DETACH if $c->{depth} > 1 }
765 unless ( ref $error ) {
767 $error = qq/Caught exception "$error"/;
770 $c->log->error($error);
787 $c->finalize_uploads;
790 if ( $#{ $c->error } >= 0 ) {
794 $c->finalize_headers;
797 if ( $c->request->method eq 'HEAD' ) {
798 $c->response->body('');
803 return $c->response->status;
806 =item $c->finalize_body
812 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
814 =item $c->finalize_cookies
820 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
822 =item $c->finalize_error
828 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
830 =item $c->finalize_headers
836 sub finalize_headers {
839 # Check if we already finalized headers
840 return if $c->response->{_finalized_headers};
843 if ( my $location = $c->response->redirect ) {
844 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
845 $c->response->header( Location => $location );
849 if ( $c->response->body && !$c->response->content_length ) {
850 $c->response->content_length( bytes::length( $c->response->body ) );
854 if ( $c->response->status =~ /^(1\d\d|[23]04)$/ ) {
855 $c->response->headers->remove_header("Content-Length");
856 $c->response->body('');
859 $c->finalize_cookies;
861 $c->engine->finalize_headers( $c, @_ );
864 $c->response->{_finalized_headers} = 1;
867 =item $c->finalize_output
869 An alias for finalize_body.
871 =item $c->finalize_read
873 Finalize the input after reading is complete.
877 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
879 =item $c->finalize_uploads
881 Finalize uploads. Cleans up any temporary files.
885 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
887 =item $c->get_action( $action, $namespace, $inherit )
889 Get an action in a given namespace.
893 sub get_action { my $c = shift; $c->dispatcher->get_action( $c, @_ ) }
895 =item handle_request( $class, @arguments )
902 my ( $class, @arguments ) = @_;
904 # Always expect worst case!
910 my $c = $class->prepare(@arguments);
911 $c->{stats} = \@stats;
916 if ( $class->debug ) {
918 ( $elapsed, $status ) = $class->benchmark($handler);
919 $elapsed = sprintf '%f', $elapsed;
920 my $av = sprintf '%.3f',
921 ( $elapsed == 0 ? '??' : ( 1 / $elapsed ) );
922 my $t = Text::ASCIITable->new;
923 $t->setCols( 'Action', 'Time' );
924 $t->setColWidth( 'Action', 64, 1 );
925 $t->setColWidth( 'Time', 9, 1 );
927 for my $stat (@stats) { $t->addRow( $stat->[0], $stat->[1] ) }
929 "Request took ${elapsed}s ($av/s)\n" . $t->draw );
931 else { $status = &$handler }
935 if ( my $error = $@ ) {
937 $class->log->error(qq/Caught exception in engine "$error"/);
941 $class->log->_flush() if $class->log->can('_flush');
945 =item $c->prepare(@arguments)
947 Turns the engine-specific request( Apache, CGI ... )
948 into a Catalyst context .
953 my ( $class, @arguments ) = @_;
958 request => Catalyst::Request->new(
961 body_parameters => {},
963 headers => HTTP::Headers->new,
965 query_parameters => {},
971 response => Catalyst::Response->new(
975 headers => HTTP::Headers->new(),
984 $c->request->{_context} = $c;
985 $c->response->{_context} = $c;
986 weaken( $c->request->{_context} );
987 weaken( $c->response->{_context} );
990 my $secs = time - $START || 1;
991 my $av = sprintf '%.3f', $COUNT / $secs;
992 $c->log->debug('**********************************');
993 $c->log->debug("* Request $COUNT ($av/s) [$$]");
994 $c->log->debug('**********************************');
995 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
998 $c->prepare_request(@arguments);
999 $c->prepare_connection;
1000 $c->prepare_query_parameters;
1001 $c->prepare_headers;
1002 $c->prepare_cookies;
1006 $c->prepare_body unless $c->config->{parse_on_demand};
1009 my $method = $c->req->method || '';
1010 my $path = $c->req->path || '';
1011 my $address = $c->req->address || '';
1013 $c->log->debug(qq/"$method" request for "$path" from $address/)
1019 =item $c->prepare_action
1025 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1027 =item $c->prepare_body
1029 Prepare message body.
1036 # Do we run for the first time?
1037 return if defined $c->request->{_body};
1039 # Initialize on-demand data
1040 $c->engine->prepare_body( $c, @_ );
1041 $c->prepare_parameters;
1042 $c->prepare_uploads;
1044 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1045 my $t = Text::ASCIITable->new;
1046 $t->setCols( 'Key', 'Value' );
1047 $t->setColWidth( 'Key', 37, 1 );
1048 $t->setColWidth( 'Value', 36, 1 );
1049 $t->alignCol( 'Value', 'right' );
1050 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1051 my $param = $c->req->body_parameters->{$key};
1052 my $value = defined($param) ? $param : '';
1054 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1056 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1060 =item $c->prepare_body_chunk( $chunk )
1062 Prepare a chunk of data before sending it to HTTP::Body.
1066 sub prepare_body_chunk {
1068 $c->engine->prepare_body_chunk( $c, @_ );
1071 =item $c->prepare_body_parameters
1073 Prepare body parameters.
1077 sub prepare_body_parameters {
1079 $c->engine->prepare_body_parameters( $c, @_ );
1082 =item $c->prepare_connection
1088 sub prepare_connection {
1090 $c->engine->prepare_connection( $c, @_ );
1093 =item $c->prepare_cookies
1099 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1101 =item $c->prepare_headers
1107 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1109 =item $c->prepare_parameters
1115 sub prepare_parameters {
1117 $c->prepare_body_parameters;
1118 $c->engine->prepare_parameters( $c, @_ );
1121 =item $c->prepare_path
1123 Prepare path and base.
1127 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
1129 =item $c->prepare_query_parameters
1131 Prepare query parameters.
1135 sub prepare_query_parameters {
1138 $c->engine->prepare_query_parameters( $c, @_ );
1140 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
1141 my $t = Text::ASCIITable->new;
1142 $t->setCols( 'Key', 'Value' );
1143 $t->setColWidth( 'Key', 37, 1 );
1144 $t->setColWidth( 'Value', 36, 1 );
1145 $t->alignCol( 'Value', 'right' );
1146 for my $key ( sort keys %{ $c->req->query_parameters } ) {
1147 my $param = $c->req->query_parameters->{$key};
1148 my $value = defined($param) ? $param : '';
1150 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1152 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1156 =item $c->prepare_read
1158 Prepare the input for reading.
1162 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1164 =item $c->prepare_request
1166 Prepare the engine request.
1170 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1172 =item $c->prepare_uploads
1178 sub prepare_uploads {
1181 $c->engine->prepare_uploads( $c, @_ );
1183 if ( $c->debug && keys %{ $c->request->uploads } ) {
1184 my $t = Text::ASCIITable->new;
1185 $t->setCols( 'Key', 'Filename', 'Type', 'Size' );
1186 $t->setColWidth( 'Key', 12, 1 );
1187 $t->setColWidth( 'Filename', 28, 1 );
1188 $t->setColWidth( 'Type', 18, 1 );
1189 $t->setColWidth( 'Size', 9, 1 );
1190 $t->alignCol( 'Size', 'left' );
1191 for my $key ( sort keys %{ $c->request->uploads } ) {
1192 my $upload = $c->request->uploads->{$key};
1193 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1194 $t->addRow( $key, $u->filename, $u->type, $u->size );
1197 $c->log->debug( "File Uploads are:\n" . $t->draw );
1201 =item $c->prepare_write
1203 Prepare the output for writing.
1207 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1209 =item $c->read( [$maxlength] )
1211 Read a chunk of data from the request body. This method is designed to be
1212 used in a while loop, reading $maxlength bytes on every call. $maxlength
1213 defaults to the size of the request if not specified.
1215 You have to set MyApp->config->{parse_on_demand} to use this directly.
1219 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1227 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1229 =item $c->set_action( $action, $code, $namespace, $attrs )
1231 Set an action in a given namespace.
1235 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1237 =item $c->setup_actions($component)
1239 Setup actions for a component.
1243 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1245 =item $c->setup_components
1251 sub setup_components {
1254 my $callback = sub {
1255 my ( $component, $context ) = @_;
1257 unless ( $component->isa('Catalyst::Base') ) {
1261 my $suffix = Catalyst::Utils::class2classsuffix($component);
1262 my $config = $class->config->{$suffix} || {};
1266 eval { $instance = $component->new( $context, $config ); };
1268 if ( my $error = $@ ) {
1272 Catalyst::Exception->throw( message =>
1273 qq/Couldn't instantiate component "$component", "$error"/ );
1276 Catalyst::Exception->throw( message =>
1277 qq/Couldn't instantiate component "$component", "new() didn't return a object"/
1279 unless ref $instance;
1284 Module::Pluggable::Fast->import(
1285 name => '_catalyst_components',
1287 "$class\::Controller", "$class\::C",
1288 "$class\::Model", "$class\::M",
1289 "$class\::View", "$class\::V"
1291 callback => $callback
1295 if ( my $error = $@ ) {
1299 Catalyst::Exception->throw(
1300 message => qq/Couldn't load components "$error"/ );
1303 for my $component ( $class->_catalyst_components($class) ) {
1304 $class->components->{ ref $component || $component } = $component;
1308 =item $c->setup_dispatcher
1312 sub setup_dispatcher {
1313 my ( $class, $dispatcher ) = @_;
1316 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1319 if ( $ENV{CATALYST_DISPATCHER} ) {
1320 $dispatcher = 'Catalyst::Dispatcher::' . $ENV{CATALYST_DISPATCHER};
1323 if ( $ENV{ uc($class) . '_DISPATCHER' } ) {
1325 'Catalyst::Dispatcher::' . $ENV{ uc($class) . '_DISPATCHER' };
1328 unless ($dispatcher) {
1329 $dispatcher = 'Catalyst::Dispatcher';
1332 $dispatcher->require;
1335 Catalyst::Exception->throw(
1336 message => qq/Couldn't load dispatcher "$dispatcher", "$@"/ );
1339 # dispatcher instance
1340 $class->dispatcher( $dispatcher->new );
1343 =item $c->setup_engine
1348 my ( $class, $engine ) = @_;
1351 $engine = 'Catalyst::Engine::' . $engine;
1354 if ( $ENV{CATALYST_ENGINE} ) {
1355 $engine = 'Catalyst::Engine::' . $ENV{CATALYST_ENGINE};
1358 if ( $ENV{ uc($class) . '_ENGINE' } ) {
1359 $engine = 'Catalyst::Engine::' . $ENV{ uc($class) . '_ENGINE' };
1362 if ( !$engine && $ENV{MOD_PERL} ) {
1364 # create the apache method
1367 *{"$class\::apache"} = sub { shift->engine->apache };
1370 my ( $software, $version ) =
1371 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
1374 $version =~ s/(\.[^.]+)\./$1/g;
1376 if ( $software eq 'mod_perl' ) {
1378 if ( $version >= 1.99922 ) {
1379 $engine = 'Catalyst::Engine::Apache2::MP20';
1382 elsif ( $version >= 1.9901 ) {
1383 $engine = 'Catalyst::Engine::Apache2::MP19';
1386 elsif ( $version >= 1.24 ) {
1387 $engine = 'Catalyst::Engine::Apache::MP13';
1391 Catalyst::Exception->throw( message =>
1392 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
1395 # install the correct mod_perl handler
1396 if ( $version >= 1.9901 ) {
1397 *handler = sub : method {
1398 shift->handle_request(@_);
1402 *handler = sub ($$) { shift->handle_request(@_) };
1407 elsif ( $software eq 'Zeus-Perl' ) {
1408 $engine = 'Catalyst::Engine::Zeus';
1412 Catalyst::Exception->throw(
1413 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
1418 $engine = 'Catalyst::Engine::CGI';
1424 Catalyst::Exception->throw( message =>
1425 qq/Couldn't load engine "$engine" (maybe you forgot to install it?), "$@"/
1430 $class->engine( $engine->new );
1433 =item $c->setup_home
1438 my ( $class, $home ) = @_;
1440 if ( $ENV{CATALYST_HOME} ) {
1441 $home = $ENV{CATALYST_HOME};
1444 if ( $ENV{ uc($class) . '_HOME' } ) {
1445 $home = $ENV{ uc($class) . '_HOME' };
1449 $home = Catalyst::Utils::home($class);
1453 $class->config->{home} ||= $home;
1454 $class->config->{root} ||= dir($home)->subdir('root');
1463 my ( $class, $debug ) = @_;
1465 unless ( $class->log ) {
1466 $class->log( Catalyst::Log->new );
1469 if ( $ENV{CATALYST_DEBUG} || $ENV{ uc($class) . '_DEBUG' } || $debug ) {
1471 *{"$class\::debug"} = sub { 1 };
1472 $class->log->debug('Debug messages enabled');
1476 =item $c->setup_plugins
1481 my ( $class, $plugins ) = @_;
1484 for my $plugin ( reverse @$plugins ) {
1486 $plugin = "Catalyst::Plugin::$plugin";
1491 Catalyst::Exception->throw(
1492 message => qq/Couldn't load plugin "$plugin", "$@"/ );
1497 unshift @{"$class\::ISA"}, $plugin;
1502 =item $c->write( $data )
1504 Writes $data to the output stream. When using this method directly, you will
1505 need to manually set the Content-Length header to the length of your output
1513 # Finalize headers if someone manually writes output
1514 $c->finalize_headers;
1516 return $c->engine->write( $c, @_ );
1521 =head1 CASE SENSITIVITY
1523 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> becomes
1526 But you can activate case sensitivity with a config parameter.
1528 MyApp->config->{case_sensitive} = 1;
1530 So C<MyApp::C::Foo::Bar> becomes C</Foo/Bar>.
1532 =head1 ON-DEMAND PARSER
1534 The request body is usually parsed at the beginning of a request,
1535 but if you want to handle input yourself or speed things up a bit
1536 you can enable on-demand parsing with a config parameter.
1538 MyApp->config->{parse_on_demand} = 1;
1540 =head1 PROXY SUPPORT
1542 Many production servers operate using the common double-server approach, with
1543 a lightweight frontend web server passing requests to a larger backend
1544 server. An application running on the backend server must deal with two
1545 problems: the remote user always appears to be '127.0.0.1' and the server's
1546 hostname will appear to be 'localhost' regardless of the virtual host the
1547 user connected through.
1549 Catalyst will automatically detect this situation when you are running both
1550 the frontend and backend servers on the same machine. The following changes
1551 are made to the request.
1553 $c->req->address is set to the user's real IP address, as read from the
1554 HTTP_X_FORWARDED_FOR header.
1556 The host value for $c->req->base and $c->req->uri is set to the real host,
1557 as read from the HTTP_X_FORWARDED_HOST header.
1559 Obviously, your web server must support these 2 headers for this to work.
1561 In a more complex server farm environment where you may have your frontend
1562 proxy server(s) on different machines, you will need to set a configuration
1563 option to tell Catalyst to read the proxied data from the headers.
1565 MyApp->config->{using_frontend_proxy} = 1;
1567 If you do not wish to use the proxy support at all, you may set:
1569 MyApp->config->{ignore_frontend_proxy} = 1;
1571 =head1 THREAD SAFETY
1573 Catalyst has been tested under Apache 2's threading mpm_worker, mpm_winnt,
1574 and the standalone forking HTTP server on Windows. We believe the Catalyst
1575 core to be thread-safe.
1577 If you plan to operate in a threaded environment, remember that all other
1578 modules you are using must also be thread-safe. Some modules, most notably
1579 DBD::SQLite, are not thread-safe.
1585 Join #catalyst on irc.perl.org.
1589 http://lists.rawmode.org/mailman/listinfo/catalyst
1590 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
1594 http://catalyst.perl.org
1600 =item L<Catalyst::Manual> - The Catalyst Manual
1602 =item L<Catalyst::Engine> - Core Engine
1604 =item L<Catalyst::Log> - The Log Class.
1606 =item L<Catalyst::Request> - The Request Object
1608 =item L<Catalyst::Response> - The Response Object
1610 =item L<Catalyst::Test> - The test suite.
1668 Sebastian Riedel, C<sri@oook.de>
1672 This library is free software . You can redistribute it and/or modify it under
1673 the same terms as perl itself.