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 $CATALYST_SCRIPT_GEN = 6;
41 __PACKAGE__->mk_classdata($_)
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 specifed 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 $c->stash->{foo} ||= 'yada';
504 print $c->stash->{foo};
511 my $stash = @_ > 1 ? {@_} : $_[0];
512 while ( my ( $key, $val ) = each %$stash ) {
513 $c->{stash}->{$key} = $val;
521 =head1 INTERNAL METHODS
525 =item $c->benchmark($coderef)
527 Takes a coderef with arguments and returns elapsed time as float.
529 my ( $elapsed, $status ) = $c->benchmark( sub { return 1 } );
530 $c->log->info( sprintf "Processing took %f seconds", $elapsed );
537 my $time = [gettimeofday];
538 my @return = &$code(@_);
539 my $elapsed = tv_interval $time;
540 return wantarray ? ( $elapsed, @return ) : $elapsed;
545 Contains the components.
549 Returns a hashref containing coderefs and execution counts.
550 (Needed for deep recursion detection)
554 Returns the actual forward depth.
558 Dispatch request to actions.
562 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
564 =item $c->execute($class, $coderef)
566 Execute a coderef in given class and catch exceptions.
567 Errors are available via $c->error.
572 my ( $c, $class, $code ) = @_;
573 $class = $c->components->{$class} || $class;
575 my $callsub = ( caller(1) )[3];
580 $action = "/$action" unless $action =~ /\-\>/;
581 $c->counter->{"$code"}++;
583 if ( $c->counter->{"$code"} > $RECURSION ) {
584 my $error = qq/Deep recursion detected in "$action"/;
585 $c->log->error($error);
591 $action = "-> $action" if $callsub =~ /forward$/;
597 my ( $elapsed, @state ) =
598 $c->benchmark( $code, $class, $c, @{ $c->req->args } );
599 push @{ $c->{stats} }, [ $action, sprintf( '%fs', $elapsed ) ];
602 else { $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 ) }
606 if ( my $error = $@ ) {
608 if ( $error eq $DETACH ) { die $DETACH if $c->{depth} > 1 }
610 unless ( ref $error ) {
612 $error = qq/Caught exception "$error"/;
615 $c->log->error($error);
632 $c->finalize_uploads;
635 if ( $#{ $c->error } >= 0 ) {
639 $c->finalize_headers;
642 if ( $c->request->method eq 'HEAD' ) {
643 $c->response->body('');
648 return $c->response->status;
651 =item $c->finalize_body
657 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
659 =item $c->finalize_cookies
665 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
667 =item $c->finalize_error
673 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
675 =item $c->finalize_headers
681 sub finalize_headers {
684 # Check if we already finalized headers
685 return if $c->response->{_finalized_headers};
688 if ( my $location = $c->response->redirect ) {
689 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
690 $c->response->header( Location => $location );
694 if ( $c->response->body && !$c->response->content_length ) {
695 $c->response->content_length( bytes::length( $c->response->body ) );
699 if ( $c->response->status =~ /^(1\d\d|[23]04)$/ ) {
700 $c->response->headers->remove_header("Content-Length");
701 $c->response->body('');
704 $c->finalize_cookies;
706 $c->engine->finalize_headers( $c, @_ );
709 $c->response->{_finalized_headers} = 1;
712 =item $c->finalize_output
714 An alias for finalize_body.
716 =item $c->finalize_read
718 Finalize the input after reading is complete.
722 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
724 =item $c->finalize_uploads
726 Finalize uploads. Cleans up any temporary files.
730 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
732 =item $c->get_action( $action, $namespace, $inherit )
734 Get an action in a given namespace.
738 sub get_action { my $c = shift; $c->dispatcher->get_action( $c, @_ ) }
740 =item handle_request( $class, @arguments )
747 my ( $class, @arguments ) = @_;
749 # Always expect worst case!
755 my $c = $class->prepare(@arguments);
756 $c->{stats} = \@stats;
761 if ( $class->debug ) {
763 ( $elapsed, $status ) = $class->benchmark($handler);
764 $elapsed = sprintf '%f', $elapsed;
765 my $av = sprintf '%.3f',
766 ( $elapsed == 0 ? '??' : ( 1 / $elapsed ) );
767 my $t = Text::ASCIITable->new;
768 $t->setCols( 'Action', 'Time' );
769 $t->setColWidth( 'Action', 64, 1 );
770 $t->setColWidth( 'Time', 9, 1 );
772 for my $stat (@stats) { $t->addRow( $stat->[0], $stat->[1] ) }
774 "Request took ${elapsed}s ($av/s)\n" . $t->draw );
776 else { $status = &$handler }
780 if ( my $error = $@ ) {
782 $class->log->error(qq/Caught exception in engine "$error"/);
786 $class->log->_flush() if $class->log->can('_flush');
790 =item $c->prepare(@arguments)
792 Turns the engine-specific request( Apache, CGI ... )
793 into a Catalyst context .
798 my ( $class, @arguments ) = @_;
803 request => Catalyst::Request->new(
806 body_parameters => {},
809 headers => HTTP::Headers->new,
811 query_parameters => {},
817 response => Catalyst::Response->new(
822 headers => HTTP::Headers->new(),
831 $c->request->{_context} = $c;
832 $c->response->{_context} = $c;
833 weaken( $c->request->{_context} );
834 weaken( $c->response->{_context} );
837 my $secs = time - $START || 1;
838 my $av = sprintf '%.3f', $COUNT / $secs;
839 $c->log->debug('**********************************');
840 $c->log->debug("* Request $COUNT ($av/s) [$$]");
841 $c->log->debug('**********************************');
842 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
845 $c->prepare_request(@arguments);
846 $c->prepare_connection;
847 $c->prepare_query_parameters;
853 $c->prepare_body unless $c->config->{parse_on_demand};
856 my $method = $c->req->method || '';
857 my $path = $c->req->path || '';
858 my $address = $c->req->address || '';
860 $c->log->debug(qq/"$method" request for "$path" from $address/)
866 =item $c->prepare_action
872 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
874 =item $c->prepare_body
876 Prepare message body.
883 # Do we run for the first time?
884 return if defined $c->request->{_body};
886 # Initialize on-demand data
887 $c->engine->prepare_body( $c, @_ );
888 $c->prepare_parameters;
891 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
892 my $t = Text::ASCIITable->new;
893 $t->setCols( 'Key', 'Value' );
894 $t->setColWidth( 'Key', 37, 1 );
895 $t->setColWidth( 'Value', 36, 1 );
896 $t->alignCol( 'Value', 'right' );
897 for my $key ( sort keys %{ $c->req->body_parameters } ) {
898 my $param = $c->req->body_parameters->{$key};
899 my $value = defined($param) ? $param : '';
901 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
903 $c->log->debug( "Body Parameters are:\n" . $t->draw );
907 =item $c->prepare_body_chunk( $chunk )
909 Prepare a chunk of data before sending it to HTTP::Body.
913 sub prepare_body_chunk {
915 $c->engine->prepare_body_chunk( $c, @_ );
918 =item $c->prepare_body_parameters
920 Prepare body parameters.
924 sub prepare_body_parameters {
926 $c->engine->prepare_body_parameters( $c, @_ );
929 =item $c->prepare_connection
935 sub prepare_connection {
937 $c->engine->prepare_connection( $c, @_ );
940 =item $c->prepare_cookies
946 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
948 =item $c->prepare_headers
954 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
956 =item $c->prepare_parameters
962 sub prepare_parameters {
964 $c->prepare_body_parameters;
965 $c->engine->prepare_parameters( $c, @_ );
968 =item $c->prepare_path
970 Prepare path and base.
974 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
976 =item $c->prepare_query_parameters
978 Prepare query parameters.
982 sub prepare_query_parameters {
985 $c->engine->prepare_query_parameters( $c, @_ );
987 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
988 my $t = Text::ASCIITable->new;
989 $t->setCols( 'Key', 'Value' );
990 $t->setColWidth( 'Key', 37, 1 );
991 $t->setColWidth( 'Value', 36, 1 );
992 $t->alignCol( 'Value', 'right' );
993 for my $key ( sort keys %{ $c->req->query_parameters } ) {
994 my $param = $c->req->query_parameters->{$key};
995 my $value = defined($param) ? $param : '';
997 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
999 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1003 =item $c->prepare_read
1005 Prepare the input for reading.
1009 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1011 =item $c->prepare_request
1013 Prepare the engine request.
1017 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1019 =item $c->prepare_uploads
1025 sub prepare_uploads {
1028 $c->engine->prepare_uploads( $c, @_ );
1030 if ( $c->debug && keys %{ $c->request->uploads } ) {
1031 my $t = Text::ASCIITable->new;
1032 $t->setCols( 'Filename', 'Type', 'Size' );
1033 $t->setColWidth( 'Filename', 37, 1 );
1034 $t->setColWidth( 'Type', 24, 1 );
1035 $t->setColWidth( 'Size', 9, 1 );
1036 $t->alignCol( 'Size', 'left' );
1037 for my $key ( sort keys %{ $c->request->uploads } ) {
1038 my $upload = $c->request->uploads->{$key};
1039 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1040 $t->addRow( $key, $u->type, $u->size );
1043 $c->log->debug( "File Uploads are:\n" . $t->draw );
1047 =item $c->prepare_write
1049 Prepare the output for writing.
1053 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1055 =item $c->read( [$maxlength] )
1057 Read a chunk of data from the request body. This method is designed to be
1058 used in a while loop, reading $maxlength bytes on every call. $maxlength
1059 defaults to the size of the request if not specified.
1061 You have to set MyApp->config->{parse_on_demand} to use this directly.
1065 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1073 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1075 =item $c->set_action( $action, $code, $namespace, $attrs )
1077 Set an action in a given namespace.
1081 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1083 =item $c->setup_actions($component)
1085 Setup actions for a component.
1089 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1091 =item $c->setup_components
1097 sub setup_components {
1100 my $callback = sub {
1101 my ( $component, $context ) = @_;
1103 unless ( $component->isa('Catalyst::Base') ) {
1107 my $suffix = Catalyst::Utils::class2classsuffix($component);
1108 my $config = $class->config->{$suffix} || {};
1112 eval { $instance = $component->new( $context, $config ); };
1114 if ( my $error = $@ ) {
1118 Catalyst::Exception->throw( message =>
1119 qq/Couldn't instantiate component "$component", "$error"/ );
1122 Catalyst::Exception->throw( message =>
1123 qq/Couldn't instantiate component "$component", "new() didn't return a object"/
1125 unless ref $instance;
1130 Module::Pluggable::Fast->import(
1131 name => '_catalyst_components',
1133 "$class\::Controller", "$class\::C",
1134 "$class\::Model", "$class\::M",
1135 "$class\::View", "$class\::V"
1137 callback => $callback
1141 if ( my $error = $@ ) {
1145 Catalyst::Exception->throw(
1146 message => qq/Couldn't load components "$error"/ );
1149 for my $component ( $class->_catalyst_components($class) ) {
1150 $class->components->{ ref $component || $component } = $component;
1154 =item $c->setup_dispatcher
1158 sub setup_dispatcher {
1159 my ( $class, $dispatcher ) = @_;
1162 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1165 if ( $ENV{CATALYST_DISPATCHER} ) {
1166 $dispatcher = 'Catalyst::Dispatcher::' . $ENV{CATALYST_DISPATCHER};
1169 if ( $ENV{ uc($class) . '_DISPATCHER' } ) {
1171 'Catalyst::Dispatcher::' . $ENV{ uc($class) . '_DISPATCHER' };
1174 unless ($dispatcher) {
1175 $dispatcher = 'Catalyst::Dispatcher';
1178 $dispatcher->require;
1181 Catalyst::Exception->throw(
1182 message => qq/Couldn't load dispatcher "$dispatcher", "$@"/ );
1185 # dispatcher instance
1186 $class->dispatcher( $dispatcher->new );
1189 =item $c->setup_engine
1194 my ( $class, $engine ) = @_;
1197 $engine = 'Catalyst::Engine::' . $engine;
1200 if ( $ENV{CATALYST_ENGINE} ) {
1201 $engine = 'Catalyst::Engine::' . $ENV{CATALYST_ENGINE};
1204 if ( $ENV{ uc($class) . '_ENGINE' } ) {
1205 $engine = 'Catalyst::Engine::' . $ENV{ uc($class) . '_ENGINE' };
1208 if ( !$engine && $ENV{MOD_PERL} ) {
1210 # create the apache method
1213 *{"$class\::apache"} = sub { shift->engine->apache };
1216 my ( $software, $version ) =
1217 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
1220 $version =~ s/(\.[^.]+)\./$1/g;
1222 if ( $software eq 'mod_perl' ) {
1224 if ( $version >= 1.99922 ) {
1225 $engine = 'Catalyst::Engine::Apache2::MP20';
1228 elsif ( $version >= 1.9901 ) {
1229 $engine = 'Catalyst::Engine::Apache2::MP19';
1232 elsif ( $version >= 1.24 ) {
1233 $engine = 'Catalyst::Engine::Apache::MP13';
1237 Catalyst::Exception->throw( message =>
1238 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
1241 # install the correct mod_perl handler
1242 if ( $version >= 1.9901 ) {
1243 *handler = sub : method {
1244 shift->handle_request(@_);
1248 *handler = sub ($$) { shift->handle_request(@_) };
1253 elsif ( $software eq 'Zeus-Perl' ) {
1254 $engine = 'Catalyst::Engine::Zeus';
1258 Catalyst::Exception->throw(
1259 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
1264 $engine = 'Catalyst::Engine::CGI';
1270 Catalyst::Exception->throw( message =>
1271 qq/Couldn't load engine "$engine" (maybe you forgot to install it?), "$@"/
1276 $class->engine( $engine->new );
1279 =item $c->setup_home
1284 my ( $class, $home ) = @_;
1286 if ( $ENV{CATALYST_HOME} ) {
1287 $home = $ENV{CATALYST_HOME};
1290 if ( $ENV{ uc($class) . '_HOME' } ) {
1291 $home = $ENV{ uc($class) . '_HOME' };
1295 $home = Catalyst::Utils::home($class);
1299 $class->config->{home} ||= $home;
1300 $class->config->{root} ||= dir($home)->subdir('root');
1309 my ( $class, $debug ) = @_;
1311 unless ( $class->log ) {
1312 $class->log( Catalyst::Log->new );
1315 if ( $ENV{CATALYST_DEBUG} || $ENV{ uc($class) . '_DEBUG' } || $debug ) {
1317 *{"$class\::debug"} = sub { 1 };
1318 $class->log->debug('Debug messages enabled');
1322 =item $c->setup_plugins
1327 my ( $class, $plugins ) = @_;
1330 for my $plugin ( reverse @$plugins ) {
1332 $plugin = "Catalyst::Plugin::$plugin";
1337 Catalyst::Exception->throw(
1338 message => qq/Couldn't load plugin "$plugin", "$@"/ );
1343 unshift @{"$class\::ISA"}, $plugin;
1348 =item $c->write( $data )
1350 Writes $data to the output stream. When using this method directly, you will
1351 need to manually set the Content-Length header to the length of your output
1356 sub write { my $c = shift; return $c->engine->write( $c, @_ ) }
1360 =head1 CASE SENSITIVITY
1362 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> becomes
1365 But you can activate case sensitivity with a config parameter.
1367 MyApp->config->{case_sensitive} = 1;
1369 So C<MyApp::C::Foo::Bar> becomes C</Foo/Bar>.
1371 =head1 ON-DEMAND PARSER
1373 The request body is usually parsed at the beginning of a request,
1374 but if you want to handle input yourself or speed things up a bit
1375 you can enable on-demand parsing with a config parameter.
1377 MyApp->config->{parse_on_demand} = 1;
1379 =head1 PROXY SUPPORT
1381 Many production servers operate using the common double-server approach, with
1382 a lightweight frontend web server passing requests to a larger backend
1383 server. An application running on the backend server must deal with two
1384 problems: the remote user always appears to be '127.0.0.1' and the server's
1385 hostname will appear to be 'localhost' regardless of the virtual host the
1386 user connected through.
1388 Catalyst will automatically detect this situation when you are running both
1389 the frontend and backend servers on the same machine. The following changes
1390 are made to the request.
1392 $c->req->address is set to the user's real IP address, as read from the
1393 HTTP_X_FORWARDED_FOR header.
1395 The host value for $c->req->base and $c->req->uri is set to the real host,
1396 as read from the HTTP_X_FORWARDED_HOST header.
1398 Obviously, your web server must support these 2 headers for this to work.
1400 In a more complex server farm environment where you may have your frontend
1401 proxy server(s) on different machines, you will need to set a configuration
1402 option to tell Catalyst to read the proxied data from the headers.
1404 MyApp->config->{using_frontend_proxy} = 1;
1406 If you do not wish to use the proxy support at all, you may set:
1408 MyApp->config->{ignore_frontend_proxy} = 1;
1410 =head1 THREAD SAFETY
1412 Catalyst has been tested under Apache 2's threading mpm_worker, mpm_winnt,
1413 and the standalone forking HTTP server on Windows. We believe the Catalyst
1414 core to be thread-safe.
1416 If you plan to operate in a threaded environment, remember that all other
1417 modules you are using must also be thread-safe. Some modules, most notably
1418 DBD::SQLite, are not thread-safe.
1424 Join #catalyst on irc.perl.org.
1428 http://lists.rawmode.org/mailman/listinfo/catalyst
1429 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
1433 http://catalyst.perl.org
1439 =item L<Catalyst::Manual> - The Catalyst Manual
1441 =item L<Catalyst::Engine> - Core Engine
1443 =item L<Catalyst::Log> - The Log Class.
1445 =item L<Catalyst::Request> - The Request Object
1447 =item L<Catalyst::Response> - The Response Object
1449 =item L<Catalyst::Test> - The test suite.
1505 Sebastian Riedel, C<sri@oook.de>
1509 This library is free software . You can redistribute it and/or modify it under
1510 the same terms as perl itself.