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(
21 qw/counter depth request response state action namespace/
29 # For backwards compatibility
30 *finalize_output = \&finalize_body;
35 our $RECURSION = 1000;
36 our $DETACH = "catalyst_detach\n";
38 require Module::Pluggable::Fast;
40 # Helper script generation
41 our $CATALYST_SCRIPT_GEN = 9;
43 __PACKAGE__->mk_classdata($_)
44 for qw/components arguments dispatcher engine log/;
46 our $VERSION = '5.49_02';
49 my ( $class, @arguments ) = @_;
51 # We have to limit $class to Catalyst to avoid pushing Catalyst upon every
53 return unless $class eq 'Catalyst';
55 my $caller = caller(0);
57 unless ( $caller->isa('Catalyst') ) {
59 push @{"$caller\::ISA"}, $class;
62 $caller->arguments( [@arguments] );
68 Catalyst - The Elegant MVC Web Application Framework
72 # use the helper to start a new application
76 # add models, views, controllers
77 script/myapp_create.pl model Something
78 script/myapp_create.pl view Stuff
79 script/myapp_create.pl controller Yada
82 script/myapp_server.pl
84 # command line interface
85 script/myapp_test.pl /yada
90 use Catalyst qw/My::Module My::OtherModule/;
92 use Catalyst '-Debug';
94 use Catalyst qw/-Debug -Engine=CGI/;
96 sub default : Private { $_[1]->res->output('Hello') } );
98 sub index : Path('/index.html') {
99 my ( $self, $c ) = @_;
100 $c->res->output('Hello');
104 sub product : Regex('^product[_]*(\d*).html$') {
105 my ( $self, $c ) = @_;
106 $c->stash->{template} = 'product.tt';
107 $c->stash->{product} = $c->req->snippets->[0];
110 See also L<Catalyst::Manual::Intro>
114 The key concept of Catalyst is DRY (Don't Repeat Yourself).
116 See L<Catalyst::Manual> for more documentation.
118 Catalyst plugins can be loaded by naming them as arguments to the "use Catalyst" statement.
119 Omit the C<Catalyst::Plugin::> prefix from the plugin name,
120 so C<Catalyst::Plugin::My::Module> becomes C<My::Module>.
122 use Catalyst 'My::Module';
124 Special flags like -Debug and -Engine can also be specified as arguments when
127 use Catalyst qw/-Debug My::Module/;
129 The position of plugins and flags in the chain is important, because they are
130 loaded in exactly the order that they appear.
132 The following flags are supported:
138 enables debug output, i.e.:
140 use Catalyst '-Debug';
142 this is equivalent to:
149 Force Catalyst to use a specific dispatcher.
153 Force Catalyst to use a specific engine.
154 Omit the C<Catalyst::Engine::> prefix of the engine name, i.e.:
156 use Catalyst '-Engine=CGI';
160 Force Catalyst to use a specific home directory.
174 Accessor for the current action
176 =item $c->comp($name)
178 =item $c->component($name)
180 Get a component object by name.
182 $c->comp('MyApp::Model::MyModel')->do_stuff;
193 my $appclass = ref $c || $c;
196 $name, "${appclass}::${name}",
197 map { "${appclass}::${_}::${name}" } qw/M V C/
200 foreach my $try (@names) {
202 if ( exists $c->components->{$try} ) {
204 return $c->components->{$try};
208 foreach my $component ( keys %{ $c->components } ) {
210 return $c->components->{$component} if $component =~ /$name/i;
215 return sort keys %{ $c->components };
220 Returns a hashref containing your applications settings.
224 Overload to enable debug messages.
230 =item $c->detach( $command [, \@arguments ] )
232 Like C<forward> but doesn't return.
236 sub detach { my $c = shift; $c->dispatcher->detach( $c, @_ ) }
240 Contains the dispatcher instance.
241 Stringifies to class.
243 =item $c->forward( $command [, \@arguments ] )
245 Forward processing to a private action or a method from a class.
246 If you define a class without method it will default to process().
247 also takes an optional arrayref containing arguments to be passed
248 to the new function. $c->req->args will be reset upon returning
252 $c->forward('index');
253 $c->forward(qw/MyApp::Model::CDBI::Foo do_stuff/);
254 $c->forward('MyApp::View::TT');
258 sub forward { my $c = shift; $c->dispatcher->forward( $c, @_ ) }
262 Accessor to the namespace of the current action
264 =item $c->path_to(@path)
266 Merges C<@path> with $c->config->{home} and returns a L<Path::Class> object.
270 $c->path_to( 'db', 'sqlite.db' );
275 my ( $c, @path ) = @_;
276 my $path = dir( $c->config->{home}, @path );
277 if ( -d $path ) { return $path }
278 else { return file( $c->config->{home}, @path ) }
290 my ( $class, @arguments ) = @_;
292 unless ( $class->isa('Catalyst') ) {
294 Catalyst::Exception->throw(
295 message => qq/'$class' does not inherit from Catalyst/ );
298 if ( $class->arguments ) {
299 @arguments = ( @arguments, @{ $class->arguments } );
305 foreach (@arguments) {
309 ( $flags->{log} ) ? 'debug,' . $flags->{log} : 'debug';
311 elsif (/^-(\w+)=?(.*)$/) {
312 $flags->{ lc $1 } = $2;
315 push @{ $flags->{plugins} }, $_;
319 $class->setup_log( delete $flags->{log} );
320 $class->setup_plugins( delete $flags->{plugins} );
321 $class->setup_dispatcher( delete $flags->{dispatcher} );
322 $class->setup_engine( delete $flags->{engine} );
323 $class->setup_home( delete $flags->{home} );
325 for my $flag ( sort keys %{$flags} ) {
327 if ( my $code = $class->can( 'setup_' . $flag ) ) {
328 &$code( $class, delete $flags->{$flag} );
331 $class->log->warn(qq/Unknown flag "$flag"/);
335 $class->log->warn( "You are running an old helper script! "
336 . "Please update your scripts by regenerating the "
337 . "application and copying over the new scripts." )
338 if ( $ENV{CATALYST_SCRIPT_GEN}
339 && ( $ENV{CATALYST_SCRIPT_GEN} < $Catalyst::CATALYST_SCRIPT_GEN ) );
341 if ( $class->debug ) {
347 @plugins = grep { /^Catalyst::Plugin/ } @{"$class\::ISA"};
351 my $t = Text::ASCIITable->new;
352 $t->setOptions( 'hide_HeadRow', 1 );
353 $t->setOptions( 'hide_HeadLine', 1 );
354 $t->setCols('Class');
355 $t->setColWidth( 'Class', 75, 1 );
356 $t->addRow($_) for @plugins;
357 $class->log->debug( "Loaded plugins:\n" . $t->draw );
360 my $dispatcher = $class->dispatcher;
361 my $engine = $class->engine;
362 my $home = $class->config->{home};
364 $class->log->debug(qq/Loaded dispatcher "$dispatcher"/);
365 $class->log->debug(qq/Loaded engine "$engine"/);
369 ? $class->log->debug(qq/Found home "$home"/)
370 : $class->log->debug(qq/Home "$home" doesn't exist/)
371 : $class->log->debug(q/Couldn't find home/);
376 no warnings qw/redefine/;
377 local *setup = sub { };
381 # Initialize our data structure
382 $class->components( {} );
384 $class->setup_components;
386 if ( $class->debug ) {
387 my $t = Text::ASCIITable->new;
388 $t->setOptions( 'hide_HeadRow', 1 );
389 $t->setOptions( 'hide_HeadLine', 1 );
390 $t->setCols('Class');
391 $t->setColWidth( 'Class', 75, 1 );
392 $t->addRow($_) for sort keys %{ $class->components };
393 $class->log->debug( "Loaded components:\n" . $t->draw )
394 if ( @{ $t->{tbl_rows} } );
397 # Add our self to components, since we are also a component
398 $class->components->{$class} = $class;
400 $class->setup_actions;
402 if ( $class->debug ) {
403 my $name = $class->config->{name} || 'Application';
404 $class->log->info("$name powered by Catalyst $Catalyst::VERSION");
406 $class->log->_flush() if $class->log->can('_flush');
409 =item $c->uri_for($path,[@args])
411 Merges path with $c->request->base for absolute uri's and with
412 $c->request->match for relative uri's, then returns a normalized
413 L<URI> object. If any args are passed, they are added at the end
419 my ( $c, $path, @args ) = @_;
420 my $base = $c->request->base->clone;
421 my $basepath = $base->path;
422 $basepath =~ s/\/$//;
424 my $match = $c->request->match;
426 # massage match, empty if absolute path
428 $match .= '/' if $match;
429 $match = '' if $path =~ /^\//;
432 # join args with '/', or a blank string
433 my $args = ( scalar @args ? '/' . join( '/', @args ) : '' );
434 return URI->new_abs( URI->new_abs( "$path$args", "$basepath$match" ),
440 =item $c->error($error, ...)
442 =item $c->error($arrayref)
444 Returns an arrayref containing error messages.
446 my @error = @{ $c->error };
450 $c->error('Something bad happened');
461 my $error = ref $_[0] eq 'ARRAY' ? $_[0] : [@_];
462 push @{ $c->{error} }, @$error;
464 elsif ( defined $_[0] ) { $c->{error} = undef }
465 return $c->{error} || [];
470 Contains the engine instance.
471 Stringifies to the class.
475 Contains the logging object. Unless it is already set Catalyst sets this up with a
476 C<Catalyst::Log> object. To use your own log class:
478 $c->log( MyLogger->new );
479 $c->log->info("now logging with my own logger!");
481 Your log class should implement the methods described in the C<Catalyst::Log>
484 =item $c->plugin( $name, $class, @args )
486 Instant plugins for Catalyst.
487 Classdata accessor/mutator will be created, class loaded and instantiated.
489 MyApp->plugin( 'prototype', 'HTML::Prototype' );
491 $c->prototype->define_javascript_functions;
496 my ( $class, $name, $plugin, @args ) = @_;
499 if ( my $error = $UNIVERSAL::require::ERROR ) {
500 Catalyst::Exception->throw(
501 message => qq/Couldn't load instant plugin "$plugin", "$error"/ );
504 eval { $plugin->import };
505 $class->mk_classdata($name);
507 eval { $obj = $plugin->new(@args) };
510 Catalyst::Exception->throw( message =>
511 qq/Couldn't instantiate instant plugin "$plugin", "$@"/ );
515 $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/)
523 Returns a C<Catalyst::Request> object.
531 Returns a C<Catalyst::Response> object.
537 Contains the return value of the last executed action.
541 Returns a hashref containing all your data.
543 print $c->stash->{foo};
545 Keys may be set in the stash by assigning to the hash reference, or by passing
546 either a single hash reference or a list of key/value pairs as arguments.
550 $c->stash->{foo} ||= 'yada';
551 $c->stash( { moose => 'majestic', qux => 0 } );
552 $c->stash( bar => 1, gorch => 2 );
559 my $stash = @_ > 1 ? {@_} : $_[0];
560 while ( my ( $key, $val ) = each %$stash ) {
561 $c->{stash}->{$key} = $val;
567 =item $c->welcome_message
569 Returns the Catalyst welcome HTML page.
573 sub welcome_message {
575 my $name = $c->config->{name};
576 my $logo = $c->uri_for('/static/images/catalyst_logo.png');
577 my $prefix = Catalyst::Utils::appprefix( ref $c );
581 <title>$name on Catalyst $VERSION</title>
582 <style type="text/css">
587 background-color: #eee;
595 background-color: #ccc;
596 border: 1px solid #aaa;
597 -moz-border-radius: 10px;
602 font-family: verdana, tahoma, sans-serif;
605 font-family: verdana, tahoma, sans-serif;
608 text-decoration: none;
610 border-bottom: 1px dotted #bbb;
612 :link:hover, :visited:hover {
625 background-color: #fff;
626 border: 1px solid #aaa;
627 -moz-border-radius: 10px;
652 <h1><b id="appname">$name</b> on <a href="http://catalyst.perl.org">Catalyst</a>
659 <p>Welcome to the wonderful world of Catalyst.
660 This <a href="http://en.wikipedia.org/wiki/MVC">MVC</a>
661 framework will make web development something you had
662 never expected it to be: Fun, rewarding and quick.</p>
663 <h2>What to do now?</h2>
664 <p>That really depends on what <b>you</b> want to do.
665 We do, however, provide you with a few starting points.</p>
666 <p>If you want to jump right into web development with Catalyst
667 you might want to check out the documentation.</p>
668 <pre><code>perldoc <a href="http://cpansearch.perl.org/dist/Catalyst/lib/Catalyst/Manual/Intro.pod">Catalyst::Manual::Intro</a>
669 perldoc <a href="http://cpansearch.perl.org/dist/Catalyst/lib/Catalyst/Manual.pod">Catalyst::Manual</a></code></pre>
670 <h2>What to do next?</h2>
671 <p>Next it's time to write an actual application. Use the
672 helper scripts to generate <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AController%3A%3A&mode=all">controllers</a>,
673 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AModel%3A%3A&mode=all">models</a> and
674 <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3AView%3A%3A&mode=all">views</a>,
675 they can save you a lot of work.</p>
676 <pre><code>script/${prefix}_create.pl -help</code></pre>
677 <p>Also, be sure to check out the vast and growing
678 collection of <a href="http://cpansearch.perl.org/search?query=Catalyst%3A%3APlugin%3A%3A&mode=all">plugins for Catalyst on CPAN</a>,
679 you are likely to find what you need there.
683 <p>Catalyst has a very active community. Here are the main places to
684 get in touch with us.</p>
687 <a href="http://dev.catalyst.perl.org">Wiki</a>
690 <a href="http://lists.rawmode.org/mailman/listinfo/catalyst">Mailing-List</a>
693 <a href="irc://irc.perl.org/catalyst">IRC channel #catalyst on irc.perl.org</a>
696 <h2>In conclusion</h2>
697 <p>The Catalyst team hopes you will enjoy using Catalyst as much
698 as we enjoyed making it. Please contact us if you have ideas
699 for improvement or other feedback.</p>
709 =head1 INTERNAL METHODS
713 =item $c->benchmark($coderef)
715 Takes a coderef with arguments and returns elapsed time as float.
717 my ( $elapsed, $status ) = $c->benchmark( sub { return 1 } );
718 $c->log->info( sprintf "Processing took %f seconds", $elapsed );
725 my $time = [gettimeofday];
726 my @return = &$code(@_);
727 my $elapsed = tv_interval $time;
728 return wantarray ? ( $elapsed, @return ) : $elapsed;
733 Contains the components.
737 Returns a hashref containing coderefs and execution counts.
738 (Needed for deep recursion detection)
742 Returns the actual forward depth.
746 Dispatch request to actions.
750 sub dispatch { my $c = shift; $c->dispatcher->dispatch( $c, @_ ) }
755 Returns a list of 2-element array references (name, structure) pairs that will
756 be dumped on the error page in debug mode.
762 [ Request => $c->req ], [ Response => $c->res ], [ Stash => $c->stash ],;
765 =item $c->execute($class, $coderef)
767 Execute a coderef in given class and catch exceptions.
768 Errors are available via $c->error.
773 my ( $c, $class, $code ) = @_;
774 $class = $c->components->{$class} || $class;
776 my $callsub = ( caller(1) )[3];
781 $action = "/$action" unless $action =~ /\-\>/;
782 $c->counter->{"$code"}++;
784 if ( $c->counter->{"$code"} > $RECURSION ) {
785 my $error = qq/Deep recursion detected in "$action"/;
786 $c->log->error($error);
792 $action = "-> $action" if $callsub =~ /forward$/;
798 my ( $elapsed, @state ) =
799 $c->benchmark( $code, $class, $c, @{ $c->req->args } );
800 push @{ $c->{stats} }, [ $action, sprintf( '%fs', $elapsed ) ];
804 $c->state( &$code( $class, $c, @{ $c->req->args } ) || 0 );
809 if ( my $error = $@ ) {
811 if ( $error eq $DETACH ) { die $DETACH if $c->{depth} > 1 }
813 unless ( ref $error ) {
815 $error = qq/Caught exception "$error"/;
818 $c->log->error($error);
835 $c->finalize_uploads;
838 if ( $#{ $c->error } >= 0 ) {
842 $c->finalize_headers;
845 if ( $c->request->method eq 'HEAD' ) {
846 $c->response->body('');
851 return $c->response->status;
854 =item $c->finalize_body
860 sub finalize_body { my $c = shift; $c->engine->finalize_body( $c, @_ ) }
862 =item $c->finalize_cookies
868 sub finalize_cookies { my $c = shift; $c->engine->finalize_cookies( $c, @_ ) }
870 =item $c->finalize_error
876 sub finalize_error { my $c = shift; $c->engine->finalize_error( $c, @_ ) }
878 =item $c->finalize_headers
884 sub finalize_headers {
887 # Check if we already finalized headers
888 return if $c->response->{_finalized_headers};
891 if ( my $location = $c->response->redirect ) {
892 $c->log->debug(qq/Redirecting to "$location"/) if $c->debug;
893 $c->response->header( Location => $location );
897 if ( $c->response->body && !$c->response->content_length ) {
898 $c->response->content_length( bytes::length( $c->response->body ) );
902 if ( $c->response->status =~ /^(1\d\d|[23]04)$/ ) {
903 $c->response->headers->remove_header("Content-Length");
904 $c->response->body('');
907 $c->finalize_cookies;
909 $c->engine->finalize_headers( $c, @_ );
912 $c->response->{_finalized_headers} = 1;
915 =item $c->finalize_output
917 An alias for finalize_body.
919 =item $c->finalize_read
921 Finalize the input after reading is complete.
925 sub finalize_read { my $c = shift; $c->engine->finalize_read( $c, @_ ) }
927 =item $c->finalize_uploads
929 Finalize uploads. Cleans up any temporary files.
933 sub finalize_uploads { my $c = shift; $c->engine->finalize_uploads( $c, @_ ) }
935 =item $c->get_action( $action, $namespace )
937 Get an action in a given namespace.
941 sub get_action { my $c = shift; $c->dispatcher->get_action( $c, @_ ) }
943 =item $c->get_actions( $action, $namespace )
945 Get all actions of a given name in a namespace and all base namespaces.
949 sub get_actions { my $c = shift; $c->dispatcher->get_actions( $c, @_ ) }
951 =item handle_request( $class, @arguments )
958 my ( $class, @arguments ) = @_;
960 # Always expect worst case!
966 my $c = $class->prepare(@arguments);
967 $c->{stats} = \@stats;
972 if ( $class->debug ) {
974 ( $elapsed, $status ) = $class->benchmark($handler);
975 $elapsed = sprintf '%f', $elapsed;
976 my $av = sprintf '%.3f',
977 ( $elapsed == 0 ? '??' : ( 1 / $elapsed ) );
978 my $t = Text::ASCIITable->new;
979 $t->setCols( 'Action', 'Time' );
980 $t->setColWidth( 'Action', 64, 1 );
981 $t->setColWidth( 'Time', 9, 1 );
983 for my $stat (@stats) { $t->addRow( $stat->[0], $stat->[1] ) }
985 "Request took ${elapsed}s ($av/s)\n" . $t->draw );
987 else { $status = &$handler }
991 if ( my $error = $@ ) {
993 $class->log->error(qq/Caught exception in engine "$error"/);
997 $class->log->_flush() if $class->log->can('_flush');
1001 =item $c->prepare(@arguments)
1003 Turns the engine-specific request( Apache, CGI ... )
1004 into a Catalyst context .
1009 my ( $class, @arguments ) = @_;
1014 request => Catalyst::Request->new(
1017 body_parameters => {},
1019 headers => HTTP::Headers->new,
1021 query_parameters => {},
1027 response => Catalyst::Response->new(
1031 headers => HTTP::Headers->new(),
1039 # For on-demand data
1040 $c->request->{_context} = $c;
1041 $c->response->{_context} = $c;
1042 weaken( $c->request->{_context} );
1043 weaken( $c->response->{_context} );
1046 my $secs = time - $START || 1;
1047 my $av = sprintf '%.3f', $COUNT / $secs;
1048 $c->log->debug('**********************************');
1049 $c->log->debug("* Request $COUNT ($av/s) [$$]");
1050 $c->log->debug('**********************************');
1051 $c->res->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
1054 $c->prepare_request(@arguments);
1055 $c->prepare_connection;
1056 $c->prepare_query_parameters;
1057 $c->prepare_headers;
1058 $c->prepare_cookies;
1062 $c->prepare_body unless $c->config->{parse_on_demand};
1065 my $method = $c->req->method || '';
1066 my $path = $c->req->path || '';
1067 my $address = $c->req->address || '';
1069 $c->log->debug(qq/"$method" request for "$path" from $address/)
1075 =item $c->prepare_action
1081 sub prepare_action { my $c = shift; $c->dispatcher->prepare_action( $c, @_ ) }
1083 =item $c->prepare_body
1085 Prepare message body.
1092 # Do we run for the first time?
1093 return if defined $c->request->{_body};
1095 # Initialize on-demand data
1096 $c->engine->prepare_body( $c, @_ );
1097 $c->prepare_parameters;
1098 $c->prepare_uploads;
1100 if ( $c->debug && keys %{ $c->req->body_parameters } ) {
1101 my $t = Text::ASCIITable->new;
1102 $t->setCols( 'Key', 'Value' );
1103 $t->setColWidth( 'Key', 37, 1 );
1104 $t->setColWidth( 'Value', 36, 1 );
1105 $t->alignCol( 'Value', 'right' );
1106 for my $key ( sort keys %{ $c->req->body_parameters } ) {
1107 my $param = $c->req->body_parameters->{$key};
1108 my $value = defined($param) ? $param : '';
1110 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1112 $c->log->debug( "Body Parameters are:\n" . $t->draw );
1116 =item $c->prepare_body_chunk( $chunk )
1118 Prepare a chunk of data before sending it to HTTP::Body.
1122 sub prepare_body_chunk {
1124 $c->engine->prepare_body_chunk( $c, @_ );
1127 =item $c->prepare_body_parameters
1129 Prepare body parameters.
1133 sub prepare_body_parameters {
1135 $c->engine->prepare_body_parameters( $c, @_ );
1138 =item $c->prepare_connection
1144 sub prepare_connection {
1146 $c->engine->prepare_connection( $c, @_ );
1149 =item $c->prepare_cookies
1155 sub prepare_cookies { my $c = shift; $c->engine->prepare_cookies( $c, @_ ) }
1157 =item $c->prepare_headers
1163 sub prepare_headers { my $c = shift; $c->engine->prepare_headers( $c, @_ ) }
1165 =item $c->prepare_parameters
1171 sub prepare_parameters {
1173 $c->prepare_body_parameters;
1174 $c->engine->prepare_parameters( $c, @_ );
1177 =item $c->prepare_path
1179 Prepare path and base.
1183 sub prepare_path { my $c = shift; $c->engine->prepare_path( $c, @_ ) }
1185 =item $c->prepare_query_parameters
1187 Prepare query parameters.
1191 sub prepare_query_parameters {
1194 $c->engine->prepare_query_parameters( $c, @_ );
1196 if ( $c->debug && keys %{ $c->request->query_parameters } ) {
1197 my $t = Text::ASCIITable->new;
1198 $t->setCols( 'Key', 'Value' );
1199 $t->setColWidth( 'Key', 37, 1 );
1200 $t->setColWidth( 'Value', 36, 1 );
1201 $t->alignCol( 'Value', 'right' );
1202 for my $key ( sort keys %{ $c->req->query_parameters } ) {
1203 my $param = $c->req->query_parameters->{$key};
1204 my $value = defined($param) ? $param : '';
1206 ref $value eq 'ARRAY' ? ( join ', ', @$value ) : $value );
1208 $c->log->debug( "Query Parameters are:\n" . $t->draw );
1212 =item $c->prepare_read
1214 Prepare the input for reading.
1218 sub prepare_read { my $c = shift; $c->engine->prepare_read( $c, @_ ) }
1220 =item $c->prepare_request
1222 Prepare the engine request.
1226 sub prepare_request { my $c = shift; $c->engine->prepare_request( $c, @_ ) }
1228 =item $c->prepare_uploads
1234 sub prepare_uploads {
1237 $c->engine->prepare_uploads( $c, @_ );
1239 if ( $c->debug && keys %{ $c->request->uploads } ) {
1240 my $t = Text::ASCIITable->new;
1241 $t->setCols( 'Key', 'Filename', 'Type', 'Size' );
1242 $t->setColWidth( 'Key', 12, 1 );
1243 $t->setColWidth( 'Filename', 28, 1 );
1244 $t->setColWidth( 'Type', 18, 1 );
1245 $t->setColWidth( 'Size', 9, 1 );
1246 $t->alignCol( 'Size', 'left' );
1247 for my $key ( sort keys %{ $c->request->uploads } ) {
1248 my $upload = $c->request->uploads->{$key};
1249 for my $u ( ref $upload eq 'ARRAY' ? @{$upload} : ($upload) ) {
1250 $t->addRow( $key, $u->filename, $u->type, $u->size );
1253 $c->log->debug( "File Uploads are:\n" . $t->draw );
1257 =item $c->prepare_write
1259 Prepare the output for writing.
1263 sub prepare_write { my $c = shift; $c->engine->prepare_write( $c, @_ ) }
1265 =item $c->read( [$maxlength] )
1267 Read a chunk of data from the request body. This method is designed to be
1268 used in a while loop, reading $maxlength bytes on every call. $maxlength
1269 defaults to the size of the request if not specified.
1271 You have to set MyApp->config->{parse_on_demand} to use this directly.
1275 sub read { my $c = shift; return $c->engine->read( $c, @_ ) }
1283 sub run { my $c = shift; return $c->engine->run( $c, @_ ) }
1285 =item $c->set_action( $action, $code, $namespace, $attrs )
1287 Set an action in a given namespace.
1291 sub set_action { my $c = shift; $c->dispatcher->set_action( $c, @_ ) }
1293 =item $c->setup_actions($component)
1295 Setup actions for a component.
1299 sub setup_actions { my $c = shift; $c->dispatcher->setup_actions( $c, @_ ) }
1301 =item $c->setup_components
1307 sub setup_components {
1310 my $callback = sub {
1311 my ( $component, $context ) = @_;
1313 unless ( $component->isa('Catalyst::Base') ) {
1317 my $suffix = Catalyst::Utils::class2classsuffix($component);
1318 my $config = $class->config->{$suffix} || {};
1322 eval { $instance = $component->new( $context, $config ); };
1324 if ( my $error = $@ ) {
1328 Catalyst::Exception->throw( message =>
1329 qq/Couldn't instantiate component "$component", "$error"/ );
1332 Catalyst::Exception->throw( message =>
1333 qq/Couldn't instantiate component "$component", "new() didn't return a object"/
1335 unless ref $instance;
1340 Module::Pluggable::Fast->import(
1341 name => '_catalyst_components',
1343 "$class\::Controller", "$class\::C",
1344 "$class\::Model", "$class\::M",
1345 "$class\::View", "$class\::V"
1347 callback => $callback
1351 if ( my $error = $@ ) {
1355 Catalyst::Exception->throw(
1356 message => qq/Couldn't load components "$error"/ );
1359 for my $component ( $class->_catalyst_components($class) ) {
1360 $class->components->{ ref $component || $component } = $component;
1364 =item $c->setup_dispatcher
1368 sub setup_dispatcher {
1369 my ( $class, $dispatcher ) = @_;
1372 $dispatcher = 'Catalyst::Dispatcher::' . $dispatcher;
1375 if ( $ENV{CATALYST_DISPATCHER} ) {
1376 $dispatcher = 'Catalyst::Dispatcher::' . $ENV{CATALYST_DISPATCHER};
1379 if ( $ENV{ uc($class) . '_DISPATCHER' } ) {
1381 'Catalyst::Dispatcher::' . $ENV{ uc($class) . '_DISPATCHER' };
1384 unless ($dispatcher) {
1385 $dispatcher = 'Catalyst::Dispatcher';
1388 $dispatcher->require;
1391 Catalyst::Exception->throw(
1392 message => qq/Couldn't load dispatcher "$dispatcher", "$@"/ );
1395 # dispatcher instance
1396 $class->dispatcher( $dispatcher->new );
1399 =item $c->setup_engine
1404 my ( $class, $engine ) = @_;
1407 $engine = 'Catalyst::Engine::' . $engine;
1410 if ( $ENV{CATALYST_ENGINE} ) {
1411 $engine = 'Catalyst::Engine::' . $ENV{CATALYST_ENGINE};
1414 if ( $ENV{ uc($class) . '_ENGINE' } ) {
1415 $engine = 'Catalyst::Engine::' . $ENV{ uc($class) . '_ENGINE' };
1418 if ( !$engine && $ENV{MOD_PERL} ) {
1420 # create the apache method
1423 *{"$class\::apache"} = sub { shift->engine->apache };
1426 my ( $software, $version ) =
1427 $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
1430 $version =~ s/(\.[^.]+)\./$1/g;
1432 if ( $software eq 'mod_perl' ) {
1434 if ( $version >= 1.99922 ) {
1435 $engine = 'Catalyst::Engine::Apache2::MP20';
1438 elsif ( $version >= 1.9901 ) {
1439 $engine = 'Catalyst::Engine::Apache2::MP19';
1442 elsif ( $version >= 1.24 ) {
1443 $engine = 'Catalyst::Engine::Apache::MP13';
1447 Catalyst::Exception->throw( message =>
1448 qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
1451 # install the correct mod_perl handler
1452 if ( $version >= 1.9901 ) {
1453 *handler = sub : method {
1454 shift->handle_request(@_);
1458 *handler = sub ($$) { shift->handle_request(@_) };
1463 elsif ( $software eq 'Zeus-Perl' ) {
1464 $engine = 'Catalyst::Engine::Zeus';
1468 Catalyst::Exception->throw(
1469 message => qq/Unsupported mod_perl: $ENV{MOD_PERL}/ );
1474 $engine = 'Catalyst::Engine::CGI';
1480 Catalyst::Exception->throw( message =>
1481 qq/Couldn't load engine "$engine" (maybe you forgot to install it?), "$@"/
1485 # check for old engines that are no longer compatible
1487 if ( $engine->isa('Catalyst::Engine::Apache')
1488 && ! Catalyst::Engine::Apache->VERSION )
1493 elsif ( $engine->isa('Catalyst::Engine::Server::Base')
1494 && Catalyst::Engine::Server->VERSION le '0.02' )
1499 elsif ( $engine->isa('Catalyst::Engine::HTTP::POE')
1500 && $engine->VERSION eq '0.01' )
1505 elsif ( $engine->isa('Catalyst::Engine::Zeus')
1506 && $engine->VERSION eq '0.01' )
1512 Catalyst::Exception->throw( message =>
1513 qq/Engine "$engine" is not supported by this version of Catalyst/
1518 $class->engine( $engine->new );
1521 =item $c->setup_home
1526 my ( $class, $home ) = @_;
1528 if ( $ENV{CATALYST_HOME} ) {
1529 $home = $ENV{CATALYST_HOME};
1532 if ( $ENV{ uc($class) . '_HOME' } ) {
1533 $home = $ENV{ uc($class) . '_HOME' };
1537 $home = Catalyst::Utils::home($class);
1541 $class->config->{home} ||= $home;
1542 $class->config->{root} ||= dir($home)->subdir('root');
1551 my ( $class, $debug ) = @_;
1553 unless ( $class->log ) {
1554 $class->log( Catalyst::Log->new );
1557 if ( $ENV{CATALYST_DEBUG} || $ENV{ uc($class) . '_DEBUG' } || $debug ) {
1559 *{"$class\::debug"} = sub { 1 };
1560 $class->log->debug('Debug messages enabled');
1564 =item $c->setup_plugins
1569 my ( $class, $plugins ) = @_;
1572 for my $plugin ( reverse @$plugins ) {
1574 $plugin = "Catalyst::Plugin::$plugin";
1579 Catalyst::Exception->throw(
1580 message => qq/Couldn't load plugin "$plugin", "$@"/ );
1585 unshift @{"$class\::ISA"}, $plugin;
1590 =item $c->write( $data )
1592 Writes $data to the output stream. When using this method directly, you will
1593 need to manually set the Content-Length header to the length of your output
1601 # Finalize headers if someone manually writes output
1602 $c->finalize_headers;
1604 return $c->engine->write( $c, @_ );
1609 Returns the Catalyst version number. mostly useful for powered by messages
1610 in template systems.
1614 sub version { return $Catalyst::VERSION }
1618 =head1 INTERNAL ACTIONS
1620 Catalyst uses internal actions like C<_DISPATCH>, C<_BEGIN>, C<_AUTO>
1621 C<_ACTION> and C<_END>, these are by default not shown in the private
1624 But you can deactivate this with a config parameter.
1626 MyApp->config->{show_internal_actions} = 1;
1628 =head1 CASE SENSITIVITY
1630 By default Catalyst is not case sensitive, so C<MyApp::C::FOO::Bar> becomes
1633 But you can activate case sensitivity with a config parameter.
1635 MyApp->config->{case_sensitive} = 1;
1637 So C<MyApp::C::Foo::Bar> becomes C</Foo/Bar>.
1639 =head1 ON-DEMAND PARSER
1641 The request body is usually parsed at the beginning of a request,
1642 but if you want to handle input yourself or speed things up a bit
1643 you can enable on-demand parsing with a config parameter.
1645 MyApp->config->{parse_on_demand} = 1;
1647 =head1 PROXY SUPPORT
1649 Many production servers operate using the common double-server approach, with
1650 a lightweight frontend web server passing requests to a larger backend
1651 server. An application running on the backend server must deal with two
1652 problems: the remote user always appears to be '127.0.0.1' and the server's
1653 hostname will appear to be 'localhost' regardless of the virtual host the
1654 user connected through.
1656 Catalyst will automatically detect this situation when you are running both
1657 the frontend and backend servers on the same machine. The following changes
1658 are made to the request.
1660 $c->req->address is set to the user's real IP address, as read from the
1661 HTTP_X_FORWARDED_FOR header.
1663 The host value for $c->req->base and $c->req->uri is set to the real host,
1664 as read from the HTTP_X_FORWARDED_HOST header.
1666 Obviously, your web server must support these 2 headers for this to work.
1668 In a more complex server farm environment where you may have your frontend
1669 proxy server(s) on different machines, you will need to set a configuration
1670 option to tell Catalyst to read the proxied data from the headers.
1672 MyApp->config->{using_frontend_proxy} = 1;
1674 If you do not wish to use the proxy support at all, you may set:
1676 MyApp->config->{ignore_frontend_proxy} = 1;
1678 =head1 THREAD SAFETY
1680 Catalyst has been tested under Apache 2's threading mpm_worker, mpm_winnt,
1681 and the standalone forking HTTP server on Windows. We believe the Catalyst
1682 core to be thread-safe.
1684 If you plan to operate in a threaded environment, remember that all other
1685 modules you are using must also be thread-safe. Some modules, most notably
1686 DBD::SQLite, are not thread-safe.
1692 Join #catalyst on irc.perl.org.
1696 http://lists.rawmode.org/mailman/listinfo/catalyst
1697 http://lists.rawmode.org/mailman/listinfo/catalyst-dev
1701 http://catalyst.perl.org
1707 =item L<Catalyst::Manual> - The Catalyst Manual
1709 =item L<Catalyst::Engine> - Core Engine
1711 =item L<Catalyst::Log> - The Log Class.
1713 =item L<Catalyst::Request> - The Request Object
1715 =item L<Catalyst::Response> - The Response Object
1717 =item L<Catalyst::Test> - The test suite.
1781 Sebastian Riedel, C<sri@oook.de>
1785 This library is free software, you can redistribute it and/or modify it under
1786 the same terms as Perl itself.