1 package Catalyst::Action::REST;
4 use namespace::autoclean;
6 extends 'Catalyst::Action';
8 use Catalyst::Request::REST;
9 use Catalyst::Controller::REST;
11 BEGIN { require 5.008001; }
13 our $VERSION = '1.02';
14 $VERSION = eval $VERSION;
19 Catalyst::Request::REST->_insert_self_into( $config->{class} );
20 return $class->SUPER::BUILDARGS($config, @_);
25 Catalyst::Action::REST - Automated REST Method Dispatching
29 sub foo :Local :ActionClass('REST') {
30 ... do setup for HTTP method specific handlers ...
34 ... do something for GET requests ...
37 # alternatively use an Action
38 sub foo_PUT : Action {
39 ... do something for PUT requests ...
44 This Action handles doing automatic method dispatching for REST requests. It
45 takes a normal Catalyst action, and changes the dispatch to append an
46 underscore and method name. First it will try dispatching to an action with
47 the generated name, and failing that it will try to dispatch to a regular
50 For example, in the synopsis above, calling GET on "/foo" would result in
51 the foo_GET method being dispatched.
53 If a method is requested that is not implemented, this action will
54 return a status 405 (Method Not Found). It will populate the "Allow" header
55 with the list of implemented request methods. You can override this behavior
56 by implementing a custom 405 handler like so:
58 sub foo_not_implemented {
59 ... handle not implemented methods ...
62 If you do not provide an _OPTIONS subroutine, we will automatically respond
63 with a 200 OK. The "Allow" header will be populated with the list of
64 implemented request methods.
66 It is likely that you really want to look at L<Catalyst::Controller::REST>,
67 which brings this class together with automatic Serialization of requests
70 When you use this module, it adds the L<Catalyst::TraitFor::Request::REST>
71 role to your request class.
79 This method overrides the default dispatch mechanism to the re-dispatching
80 mechanism described above.
88 my $rest_method = $self->name . "_" . uc( $c->request->method );
90 return $self->_dispatch_rest_method( $c, $rest_method );
93 sub _dispatch_rest_method {
96 my $rest_method = shift;
97 my $req = $c->request;
99 my $controller = $c->component( $self->class );
103 # Execute normal 'foo' action.
104 $c->execute( $self->class, $self, @{ $req->args } );
106 # Common case, for foo_GET etc
107 if ( $code = $controller->action_for($rest_method) ) {
108 return $c->forward( $code, $req->args ); # Forward to foo_GET if it's an action
110 elsif ($code = $controller->can($rest_method)) {
111 $name = $rest_method; # Stash name and code to run 'foo_GET' like an action below.
114 # Generic handling for foo_*
118 $name = $rest_method;
119 $code = sub { $self->_return_options($self->name, @_) };
122 # Otherwise, not implemented.
123 $name = $self->name . "_not_implemented";
124 $code = $controller->can($name) # User method
125 # Generic not implemented
126 || sub { $self->_return_not_implemented($self->name, @_) };
129 ($code_action->{$req->method} || $code_action->{'default'})->();
132 # localise stuff so we can dispatch the action 'as normal, but get
133 # different stats shown, and different code run.
134 # Also get the full path for the action, and make it look like a forward
135 local $self->{code} = $code;
136 my @name = split m{/}, $self->reverse;
138 local $self->{reverse} = "-> " . join('/', @name);
140 $c->execute( $self->class, $self, @{ $req->args } );
143 sub _get_allowed_methods {
144 my ( $self, $controller, $c, $name ) = @_;
145 my $class = ref($controller) ? ref($controller) : $controller;
146 my $methods = Class::Inspector->methods($class);
147 return map { /^$name\_(.+)$/ } @$methods;
150 sub _return_options {
151 my ( $self, $method_name, $controller, $c) = @_;
152 my @allowed = $self->_get_allowed_methods($controller, $c, $method_name);
153 $c->response->content_type('text/plain');
154 $c->response->status(200);
155 $c->response->header( 'Allow' => \@allowed );
158 sub _return_not_implemented {
159 my ( $self, $method_name, $controller, $c ) = @_;
161 my @allowed = $self->_get_allowed_methods($controller, $c, $method_name);
162 $c->response->content_type('text/plain');
163 $c->response->status(405);
164 $c->response->header( 'Allow' => \@allowed );
165 $c->response->body( "Method "
166 . $c->request->method
167 . " not implemented for "
168 . $c->uri_for( $method_name ) );
171 __PACKAGE__->meta->make_immutable;
179 You likely want to look at L<Catalyst::Controller::REST>, which implements a
180 sensible set of defaults for a controller doing REST.
182 This class automatically adds the L<Catalyst::TraitFor::Request::REST> role to
183 your request class. If you're writing a web application which provides RESTful
184 responses and still needs to accommodate web browsers, you may prefer to use
185 L<Catalyst::TraitFor::Request::REST::ForBrowsers> instead.
187 L<Catalyst::Action::Serialize>, L<Catalyst::Action::Deserialize>
189 =head1 TROUBLESHOOTING
193 =item Q: I'm getting a "415 Unsupported Media Type" error. What gives?!
195 A: Most likely, you haven't set Content-type equal to "application/json", or
196 one of the accepted return formats. You can do this by setting it in your query
197 accepted return formats. You can do this by setting it in your query string
198 thusly: C<< ?content-type=application%2Fjson (where %2F == / uri escaped). >>
200 B<NOTE> Apache will refuse %2F unless configured otherwise.
201 Make sure C<AllowEncodedSlashes On> is in your httpd.conf file in order
202 for this to run smoothly.
208 Adam Jacob E<lt>adam@stalecoffee.orgE<gt>, with lots of help from mst and jrockway
210 Marchex, Inc. paid me while I developed this module. (L<http://www.marchex.com>)
214 Tomas Doran (t0m) E<lt>bobtfish@bobtfish.netE<gt>
220 Daisuke Maki E<lt>daisuke@endeworks.jpE<gt>
224 Brian Phillips E<lt>bphillips@cpan.orgE<gt>
226 Dave Rolsky E<lt>autarch@urth.orgE<gt>
230 Arthur Axel "fREW" Schmidt E<lt>frioux@gmail.comE<gt>
232 J. Shirley E<lt>jshirley@gmail.comE<gt>
234 Gavin Henry E<lt>ghenry@surevoip.co.ukE<gt>
236 Gerv http://www.gerv.net/
238 Colin Newell <colin@opusvl.com>
242 Copyright (c) 2006-2012 the above named AUTHOR and CONTRIBUTORS
246 You may distribute this code under the same terms as Perl itself.