Commit | Line | Data |
68a748b9 |
1 | package Catalyst::Dispatcher; |
1abd6db7 |
2 | |
3 | use strict; |
fbcc39ad |
4 | use base 'Class::Accessor::Fast'; |
a2f2cde9 |
5 | use Catalyst::Exception; |
f05af9ba |
6 | use Catalyst::Utils; |
fbcc39ad |
7 | use Catalyst::Action; |
b7aebc12 |
8 | use Catalyst::ActionContainer; |
b96f127f |
9 | use Catalyst::DispatchType::Default; |
bcccee4e |
10 | use Catalyst::DispatchType::Index; |
1abd6db7 |
11 | use Text::ASCIITable; |
1abd6db7 |
12 | use Tree::Simple; |
13 | use Tree::Simple::Visitor::FindByPath; |
14 | |
fbcc39ad |
15 | # Stringify to class |
16 | use overload '""' => sub { return ref shift }, fallback => 1; |
17 | |
6d030e6f |
18 | __PACKAGE__->mk_accessors(qw/tree dispatch_types/); |
19 | |
20 | # Preload these action types |
21 | our @PRELOAD = qw/Path Regex/; |
1abd6db7 |
22 | |
2d1d8f91 |
23 | # Postload these action types |
24 | our @POSTLOAD = qw/Index Default/; |
25 | |
1abd6db7 |
26 | =head1 NAME |
27 | |
9c053379 |
28 | Catalyst::Dispatcher - The Catalyst Dispatcher |
1abd6db7 |
29 | |
30 | =head1 SYNOPSIS |
31 | |
32 | See L<Catalyst>. |
33 | |
34 | =head1 DESCRIPTION |
35 | |
36 | =head1 METHODS |
37 | |
38 | =over 4 |
39 | |
fbcc39ad |
40 | =item $self->detach( $c, $command [, \@arguments ] ) |
6ef62eb2 |
41 | |
42 | =cut |
43 | |
44 | sub detach { |
fbcc39ad |
45 | my ( $self, $c, $command, @args ) = @_; |
bd7d2e94 |
46 | $c->forward( $command, @args ) if $command; |
fbcc39ad |
47 | die $Catalyst::DETACH; |
6ef62eb2 |
48 | } |
49 | |
fbcc39ad |
50 | =item $self->dispatch($c) |
1abd6db7 |
51 | |
52 | =cut |
53 | |
54 | sub dispatch { |
fbcc39ad |
55 | my ( $self, $c ) = @_; |
cfd04b0c |
56 | |
66e28e3f |
57 | if ( $c->action ) { |
b0bb11ec |
58 | $c->forward( join( '/', '', $c->namespace, '_DISPATCH' ) ); |
fbcc39ad |
59 | } |
60 | |
61 | else { |
1abd6db7 |
62 | my $path = $c->req->path; |
63 | my $error = $path |
64 | ? qq/Unknown resource "$path"/ |
65 | : "No default action defined"; |
66 | $c->log->error($error) if $c->debug; |
67 | $c->error($error); |
68 | } |
69 | } |
70 | |
fbcc39ad |
71 | =item $self->forward( $c, $command [, \@arguments ] ) |
1abd6db7 |
72 | |
73 | =cut |
74 | |
75 | sub forward { |
fbcc39ad |
76 | my $self = shift; |
1abd6db7 |
77 | my $c = shift; |
78 | my $command = shift; |
99fe1710 |
79 | |
1abd6db7 |
80 | unless ($command) { |
81 | $c->log->debug('Nothing to forward to') if $c->debug; |
82 | return 0; |
83 | } |
99fe1710 |
84 | |
71c3bcc3 |
85 | # Relative forwards from detach |
fbcc39ad |
86 | my $caller = ( caller(1) )[0]->isa('Catalyst::Dispatcher') |
87 | && ( ( caller(2) )[3] =~ /::detach$/ ) ? caller(3) : caller(1); |
71c3bcc3 |
88 | |
e0fc6749 |
89 | my $arguments = ( ref( $_[-1] ) eq 'ARRAY' ) ? pop(@_) : $c->req->args; |
99fe1710 |
90 | |
a9dc674c |
91 | my $result; |
fbcc39ad |
92 | |
8199eac3 |
93 | my $command_copy = $command; |
94 | |
95 | unless ( $command_copy =~ s/^\/// ) { |
5d68b17b |
96 | my $namespace = |
78d760bb |
97 | Catalyst::Utils::class2prefix( $caller, $c->config->{case_sensitive} ) |
98 | || ''; |
5d68b17b |
99 | $command_copy = "${namespace}/${command}"; |
1abd6db7 |
100 | } |
99fe1710 |
101 | |
8199eac3 |
102 | unless ( $command_copy =~ /\// ) { |
a9dc674c |
103 | $result = $c->get_action( $command_copy, '/' ); |
8199eac3 |
104 | } |
e494bd6b |
105 | else { |
8199eac3 |
106 | my @extra_args; |
107 | DESCEND: while ( $command_copy =~ s/^(.*)\/(\w+)$/$1/ ) { |
108 | my $tail = $2; |
a9dc674c |
109 | $result = $c->get_action( $tail, $1 ); |
110 | if ( $result ) { |
8199eac3 |
111 | $command = $tail; |
112 | push( @{$arguments}, @extra_args ); |
113 | last DESCEND; |
114 | } |
115 | unshift( @extra_args, $tail ); |
116 | } |
e494bd6b |
117 | } |
99fe1710 |
118 | |
a9dc674c |
119 | unless ( $result ) { |
bd7d2e94 |
120 | |
fbcc39ad |
121 | unless ( $c->components->{$command} ) { |
bd7d2e94 |
122 | my $error = |
123 | qq/Couldn't forward to command "$command". Invalid action or component./; |
3b2ed580 |
124 | $c->error($error); |
125 | $c->log->debug($error) if $c->debug; |
1abd6db7 |
126 | return 0; |
127 | } |
bd7d2e94 |
128 | |
1f6bb799 |
129 | my $class = $command; |
1abd6db7 |
130 | my $method = shift || 'process'; |
99fe1710 |
131 | |
1f6bb799 |
132 | if ( my $code = $c->components->{$class}->can($method) ) { |
fbcc39ad |
133 | my $action = Catalyst::Action->new( |
134 | { |
6b239949 |
135 | name => $method, |
fbcc39ad |
136 | code => $code, |
137 | reverse => "$class->$method", |
11bd4e3e |
138 | class => $class, |
fbcc39ad |
139 | namespace => $class, |
140 | } |
141 | ); |
a9dc674c |
142 | $result = $action; |
fbcc39ad |
143 | } |
144 | |
145 | else { |
bd7d2e94 |
146 | my $error = |
147 | qq/Couldn't forward to "$class". Does not implement "$method"/; |
3b2ed580 |
148 | $c->error($error); |
149 | $c->log->debug($error) |
1abd6db7 |
150 | if $c->debug; |
151 | return 0; |
152 | } |
99fe1710 |
153 | |
1abd6db7 |
154 | } |
bd7d2e94 |
155 | |
156 | local $c->request->{arguments} = [ @{$arguments} ]; |
99fe1710 |
157 | |
a9dc674c |
158 | $result->execute($c); |
99fe1710 |
159 | |
1abd6db7 |
160 | return $c->state; |
161 | } |
162 | |
fbcc39ad |
163 | =item $self->prepare_action($c) |
164 | |
165 | =cut |
166 | |
167 | sub prepare_action { |
168 | my ( $self, $c ) = @_; |
169 | my $path = $c->req->path; |
170 | my @path = split /\//, $c->req->path; |
171 | $c->req->args( \my @args ); |
172 | |
78d760bb |
173 | push( @path, '/' ) unless @path; # Root action |
174 | |
b96f127f |
175 | DESCEND: while (@path) { |
fbcc39ad |
176 | $path = join '/', @path; |
fbcc39ad |
177 | |
78d760bb |
178 | $path = '' if $path eq '/'; # Root action |
179 | |
22f3a8dd |
180 | # Check out dispatch types to see if any will handle the path at |
181 | # this level |
182 | |
78d760bb |
183 | foreach my $type ( @{ $self->dispatch_types } ) { |
2633d7dc |
184 | last DESCEND if $type->match( $c, $path ); |
66e28e3f |
185 | } |
b96f127f |
186 | |
22f3a8dd |
187 | # If not, move the last part path to args |
188 | |
b96f127f |
189 | unshift @args, pop @path; |
fbcc39ad |
190 | } |
191 | |
192 | $c->log->debug( 'Arguments are "' . join( '/', @args ) . '"' ) |
193 | if ( $c->debug && @args ); |
194 | } |
195 | |
a9dc674c |
196 | =item $self->get_action( $c, $action, $namespace ) |
1abd6db7 |
197 | |
198 | =cut |
199 | |
200 | sub get_action { |
a9dc674c |
201 | my ( $self, $c, $action, $namespace ) = @_; |
1abd6db7 |
202 | return [] unless $action; |
bcccee4e |
203 | $namespace ||= ''; |
772ab8ae |
204 | $namespace = '' if $namespace eq '/'; |
99fe1710 |
205 | |
78d760bb |
206 | my @match = $self->get_containers($namespace); |
c8d9780f |
207 | |
a9dc674c |
208 | my $node = $match[-1]->actions; # Only bother looking at the last one |
772ab8ae |
209 | |
a9dc674c |
210 | if ( defined $node->{$action} |
211 | && ( $node->{$action}->namespace eq $namespace ) ) |
212 | { |
213 | return $node->{$action}; |
1abd6db7 |
214 | } |
1abd6db7 |
215 | } |
216 | |
a9dc674c |
217 | =item $self->get_actions( $c, $action, $namespace ) |
218 | |
219 | =cut |
220 | |
221 | sub get_actions { |
222 | my ( $self, $c, $action, $namespace ) = @_; |
223 | return [] unless $action; |
224 | $namespace ||= ''; |
225 | $namespace = '' if $namespace eq '/'; |
226 | |
227 | my @match = $self->get_containers($namespace); |
228 | |
229 | return |
230 | map { $_->{$action} } |
231 | grep { defined $_->{$action} } # If it exists in the container |
232 | map { $_->actions } # Get action hash for container |
233 | @match |
234 | } |
235 | |
cfd04b0c |
236 | =item $self->get_containers( $namespace ) |
237 | |
238 | =cut |
239 | |
240 | sub get_containers { |
241 | my ( $self, $namespace ) = @_; |
242 | |
90ce41ba |
243 | # If the namespace is / just return the root ActionContainer |
244 | |
78d760bb |
245 | return ( $self->tree->getNodeValue ) |
246 | if ( !$namespace || ( $namespace eq '/' ) ); |
cfd04b0c |
247 | |
90ce41ba |
248 | # Use a visitor to recurse down the tree finding the ActionContainers |
249 | # for each namespace in the chain. |
250 | |
cfd04b0c |
251 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
78d760bb |
252 | my @path = split( '/', $namespace ); |
253 | $visitor->setSearchPath(@path); |
cfd04b0c |
254 | $self->tree->accept($visitor); |
255 | |
256 | my @match = $visitor->getResults; |
78d760bb |
257 | @match = ( $self->tree ) unless @match; |
cfd04b0c |
258 | |
78d760bb |
259 | if ( !defined $visitor->getResult ) { |
90ce41ba |
260 | |
261 | # If we don't manage to match, the visitor doesn't return the last |
262 | # node is matched, so foo/bar/baz would only find the 'foo' node, |
263 | # not the foo and foo/bar nodes as it should. This does another |
264 | # single-level search to see if that's the case, and the 'last unless' |
265 | # should catch any failures - or short-circuit this if this *is* a |
266 | # bug in the visitor and gets fixed. |
267 | |
78d760bb |
268 | my $extra = $path[ ( scalar @match ) - 1 ]; |
cfd04b0c |
269 | last unless $extra; |
270 | $visitor->setSearchPath($extra); |
271 | $match[-1]->accept($visitor); |
78d760bb |
272 | push( @match, $visitor->getResult ) if defined $visitor->getResult; |
cfd04b0c |
273 | } |
274 | |
275 | return map { $_->getNodeValue } @match; |
276 | } |
277 | |
11bd4e3e |
278 | =item $self->set_action( $c, $action, $code, $class, $attrs ) |
1abd6db7 |
279 | |
280 | =cut |
281 | |
282 | sub set_action { |
11bd4e3e |
283 | my ( $self, $c, $method, $code, $class, $attrs ) = @_; |
1abd6db7 |
284 | |
11bd4e3e |
285 | my $namespace = |
286 | Catalyst::Utils::class2prefix( $class, $c->config->{case_sensitive} ) |
e494bd6b |
287 | || ''; |
b96f127f |
288 | my %attributes; |
1abd6db7 |
289 | |
290 | for my $attr ( @{$attrs} ) { |
22f3a8dd |
291 | |
292 | # Parse out :Foo(bar) into Foo => bar etc (and arrayify) |
293 | |
6d030e6f |
294 | my %initialized; |
295 | $initialized{ ref $_ }++ for @{ $self->dispatch_types }; |
296 | |
78d760bb |
297 | if ( my ( $key, $value ) = ( $attr =~ /^(.*?)(?:\(\s*(.+)\s*\))?$/ ) ) { |
6d030e6f |
298 | |
299 | # Initialize types |
300 | my $class = "Catalyst::DispatchType::$key"; |
301 | unless ( $initialized{$class} ) { |
302 | eval "require $class"; |
303 | push( @{ $self->dispatch_types }, $class->new ) unless $@; |
304 | $initialized{$class}++; |
305 | } |
306 | |
b96f127f |
307 | if ( defined $value ) { |
78d760bb |
308 | ( $value =~ s/^'(.*)'$/$1/ ) || ( $value =~ s/^"(.*)"/$1/ ); |
b96f127f |
309 | } |
78d760bb |
310 | push( @{ $attributes{$key} }, $value ); |
b96f127f |
311 | } |
1abd6db7 |
312 | } |
313 | |
6b239949 |
314 | if ( $attributes{Private} && ( keys %attributes > 1 ) ) { |
8d4e224b |
315 | $c->log->debug( 'Bad action definition "' |
d0e524d2 |
316 | . join( ' ', @{$attrs} ) |
11bd4e3e |
317 | . qq/" for "$class->$method"/ ) |
8d4e224b |
318 | if $c->debug; |
d0e524d2 |
319 | return; |
320 | } |
6b239949 |
321 | return unless keys %attributes; |
1abd6db7 |
322 | |
fbcc39ad |
323 | my $parent = $self->tree; |
1abd6db7 |
324 | my $visitor = Tree::Simple::Visitor::FindByPath->new; |
99fe1710 |
325 | |
11bd4e3e |
326 | if ($namespace) { |
327 | for my $part ( split '/', $namespace ) { |
1abd6db7 |
328 | $visitor->setSearchPath($part); |
329 | $parent->accept($visitor); |
b7aebc12 |
330 | my $child = $visitor->getResult; |
78d760bb |
331 | |
b7aebc12 |
332 | unless ($child) { |
90ce41ba |
333 | |
334 | # Create a new tree node and an ActionContainer to form |
335 | # its value. |
336 | |
78d760bb |
337 | my $container = |
338 | Catalyst::ActionContainer->new( |
339 | { part => $part, actions => {} } ); |
b7aebc12 |
340 | $child = $parent->addChild( Tree::Simple->new($container) ); |
341 | $visitor->setSearchPath($part); |
342 | $parent->accept($visitor); |
343 | $child = $visitor->getResult; |
344 | } |
78d760bb |
345 | |
b7aebc12 |
346 | $parent = $child; |
1abd6db7 |
347 | } |
1abd6db7 |
348 | } |
99fe1710 |
349 | |
11bd4e3e |
350 | my $reverse = $namespace ? "$namespace/$method" : $method; |
fbcc39ad |
351 | |
352 | my $action = Catalyst::Action->new( |
353 | { |
6b239949 |
354 | name => $method, |
b96f127f |
355 | code => $code, |
356 | reverse => $reverse, |
357 | namespace => $namespace, |
11bd4e3e |
358 | class => $class, |
b96f127f |
359 | attributes => \%attributes, |
fbcc39ad |
360 | } |
361 | ); |
362 | |
90ce41ba |
363 | # Set the method value |
b7aebc12 |
364 | $parent->getNodeValue->actions->{$method} = $action; |
fbcc39ad |
365 | |
22f3a8dd |
366 | # Pass the action to our dispatch types so they can register it if reqd. |
b96f127f |
367 | foreach my $type ( @{ $self->dispatch_types } ) { |
2633d7dc |
368 | $type->register( $c, $action ); |
b96f127f |
369 | } |
1abd6db7 |
370 | } |
371 | |
fbcc39ad |
372 | =item $self->setup_actions( $class, $component ) |
1abd6db7 |
373 | |
374 | =cut |
375 | |
376 | sub setup_actions { |
11bd4e3e |
377 | my ( $self, $c ) = @_; |
99fe1710 |
378 | |
6d030e6f |
379 | $self->dispatch_types( [] ); |
12e28165 |
380 | |
6d030e6f |
381 | # Preload action types |
382 | for my $type (@PRELOAD) { |
383 | my $class = "Catalyst::DispatchType::$type"; |
384 | eval "require $class"; |
385 | Catalyst::Exception->throw( message => qq/Couldn't load "$class"/ ) |
386 | if $@; |
387 | push @{ $self->dispatch_types }, $class->new; |
388 | } |
b96f127f |
389 | |
12e28165 |
390 | # We use a tree |
78d760bb |
391 | my $container = |
392 | Catalyst::ActionContainer->new( { part => '/', actions => {} } ); |
b7aebc12 |
393 | $self->tree( Tree::Simple->new( $container, Tree::Simple->ROOT ) ); |
e494bd6b |
394 | |
11bd4e3e |
395 | for my $comp ( keys %{ $c->components } ) { |
e494bd6b |
396 | |
397 | # We only setup components that inherit from Catalyst::Base |
a268a011 |
398 | next unless $comp->isa('Catalyst::Base'); |
99fe1710 |
399 | |
812a28c9 |
400 | for my $action ( @{ Catalyst::Utils::reflect_actions($comp) } ) { |
1abd6db7 |
401 | my ( $code, $attrs ) = @{$action}; |
402 | my $name = ''; |
403 | no strict 'refs'; |
404 | my @cache = ( $comp, @{"$comp\::ISA"} ); |
11bd4e3e |
405 | my %classes; |
99fe1710 |
406 | |
11bd4e3e |
407 | while ( my $class = shift @cache ) { |
408 | $classes{$class}++; |
ba599d1c |
409 | for my $isa ( @{"$class\::ISA"} ) { |
11bd4e3e |
410 | next if $classes{$isa}; |
1abd6db7 |
411 | push @cache, $isa; |
11bd4e3e |
412 | $classes{$isa}++; |
1abd6db7 |
413 | } |
414 | } |
99fe1710 |
415 | |
11bd4e3e |
416 | for my $class ( keys %classes ) { |
417 | for my $sym ( values %{ $class . '::' } ) { |
1abd6db7 |
418 | if ( *{$sym}{CODE} && *{$sym}{CODE} == $code ) { |
419 | $name = *{$sym}{NAME}; |
11bd4e3e |
420 | $self->set_action( $c, $name, $code, $comp, $attrs ); |
1abd6db7 |
421 | last; |
422 | } |
423 | } |
424 | } |
425 | } |
426 | } |
e494bd6b |
427 | |
2d1d8f91 |
428 | # Postload action types |
429 | for my $type (@POSTLOAD) { |
430 | my $class = "Catalyst::DispatchType::$type"; |
431 | eval "require $class"; |
432 | Catalyst::Exception->throw( message => qq/Couldn't load "$class"/ ) |
433 | if $@; |
434 | push @{ $self->dispatch_types }, $class->new; |
435 | } |
6d030e6f |
436 | |
11bd4e3e |
437 | return unless $c->debug; |
99fe1710 |
438 | |
1abd6db7 |
439 | my $privates = Text::ASCIITable->new; |
5fbed090 |
440 | $privates->setCols( 'Private', 'Class' ); |
441 | $privates->setColWidth( 'Private', 36, 1 ); |
442 | $privates->setColWidth( 'Class', 37, 1 ); |
99fe1710 |
443 | |
1abd6db7 |
444 | my $walker = sub { |
445 | my ( $walker, $parent, $prefix ) = @_; |
446 | $prefix .= $parent->getNodeValue || ''; |
447 | $prefix .= '/' unless $prefix =~ /\/$/; |
b7aebc12 |
448 | my $node = $parent->getNodeValue->actions; |
99fe1710 |
449 | |
78d760bb |
450 | for my $action ( keys %{$node} ) { |
b7aebc12 |
451 | my $action_obj = $node->{$action}; |
b0bb11ec |
452 | next |
453 | if ( ( $action =~ /^_.*/ ) |
454 | && ( !$c->config->{show_internal_actions} ) ); |
11bd4e3e |
455 | $privates->addRow( "$prefix$action", $action_obj->class ); |
1abd6db7 |
456 | } |
99fe1710 |
457 | |
1abd6db7 |
458 | $walker->( $walker, $_, $prefix ) for $parent->getAllChildren; |
459 | }; |
99fe1710 |
460 | |
1abd6db7 |
461 | $walker->( $walker, $self->tree, '' ); |
11bd4e3e |
462 | $c->log->debug( "Loaded Private actions:\n" . $privates->draw ) |
a268a011 |
463 | if ( @{ $privates->{tbl_rows} } ); |
99fe1710 |
464 | |
a9cbd748 |
465 | # List all public actions |
11bd4e3e |
466 | $_->list($c) for @{ $self->dispatch_types }; |
1abd6db7 |
467 | } |
468 | |
1abd6db7 |
469 | =back |
470 | |
471 | =head1 AUTHOR |
472 | |
473 | Sebastian Riedel, C<sri@cpan.org> |
474 | |
475 | =head1 COPYRIGHT |
476 | |
477 | This program is free software, you can redistribute it and/or modify it under |
478 | the same terms as Perl itself. |
479 | |
480 | =cut |
481 | |
482 | 1; |