3 # Created by: Adam Jacob, Marchex, <adam@hjksolutions.com>
4 # Created on: 10/12/2006 03:00:32 PM PDT
8 package Catalyst::Action::REST;
13 use base 'Catalyst::Action';
15 use Moose::Util qw(does_role);
17 use Catalyst::RequestRole::REST;
18 use Catalyst::Controller::REST;
19 use namespace::clean -except => 'meta';
21 BEGIN { require 5.008001; }
23 our $VERSION = '0.73';
27 Catalyst::Action::REST - Automated REST Method Dispatching
31 sub foo :Local :ActionClass('REST') {
32 ... do setup for HTTP method specific handlers ...
36 ... do something for GET requests ...
40 ... do somethign for PUT requests ...
45 This Action handles doing automatic method dispatching for REST requests. It
46 takes a normal Catalyst action, and changes the dispatch to append an
47 underscore and method name.
49 For example, in the synopsis above, calling GET on "/foo" would result in
50 the foo_GET method being dispatched.
52 If a method is requested that is not implemented, this action will
53 return a status 405 (Method Not Found). It will populate the "Allow" header
54 with the list of implemented request methods. You can override this behavior
55 by implementing a custom 405 handler like so:
57 sub foo_not_implemented {
58 ... handle not implemented methods ...
61 If you do not provide an _OPTIONS subroutine, we will automatically respond
62 with a 200 OK. The "Allow" header will be populated with the list of
63 implemented request methods.
65 It is likely that you really want to look at L<Catalyst::Controller::REST>,
66 which brings this class together with automatic Serialization of requests
69 When you use this module, the request class will be changed to
70 L<Catalyst::Request::REST>.
78 This method overrides the default dispatch mechanism to the re-dispatching
79 mechanism described above.
87 Catalyst::RequestRole::REST->meta->apply($c->request)
88 unless does_role($c->request, 'Catalyst::RequestRole::REST');
90 my $controller = $c->component( $self->class );
91 my $rest_method = $self->name . "_" . uc( $c->request->method );
95 # Common case, for foo_GET etc
96 if ($code = $controller->can($rest_method)) {
97 # Exceute normal action
98 $c->execute( $self->class, $self, @{ $c->req->args } );
102 # Generic handling for foo_OPTIONS
103 if (!$code && $c->request->method eq "OPTIONS") {
104 $name = $rest_method;
105 $code = sub { $self->_return_options($self->name, @_) };
108 # Otherwise, not implemented.
110 $name = $self->name . "_not_implemented";
111 $code = $controller->can($name) # User method
112 # Generic not implemented
113 || sub { $self->_return_not_implemented($self->name, @_) };
116 # localise stuff so we can dispatch the action 'as normal, but get
117 # different stats shown, and different code run.
118 local $self->{code} = $code;
119 local $self->{reverse} = $name;
121 $c->execute( $self->class, $self, @{ $c->req->args } );
124 sub _get_allowed_methods {
125 my ( $self, $controller, $c, $name ) = @_;
126 my $class = ref($controller) ? ref($controller) : $controller;
127 my $methods = Class::Inspector->methods($class);
129 foreach my $method ( @{$methods} ) {
130 if ( $method =~ /^$name\_(.+)$/ ) {
131 push( @allowed, $1 );
137 sub _return_options {
138 my ( $self, $method_name, $controller, $c) = @_;
139 my @allowed = $self->_get_allowed_methods($controller, $c, $method_name);
140 $c->response->content_type('text/plain');
141 $c->response->status(200);
142 $c->response->header( 'Allow' => \@allowed );
145 sub _return_not_implemented {
146 my ( $self, $method_name, $controller, $c ) = @_;
148 my @allowed = $self->_get_allowed_methods($controller, $c, $method_name);
149 $c->response->content_type('text/plain');
150 $c->response->status(405);
151 $c->response->header( 'Allow' => \@allowed );
152 $c->response->body( "Method "
153 . $c->request->method
154 . " not implemented for "
155 . $c->uri_for( $method_name ) );
164 You likely want to look at L<Catalyst::Controller::REST>, which implements
165 a sensible set of defaults for a controller doing REST.
167 L<Catalyst::Action::Serialize>, L<Catalyst::Action::Deserialize>
169 =head1 TROUBLESHOOTING
173 =item Q: I'm getting a "415 Unsupported Media Type" error. What gives?!
175 A: Most likely, you haven't set Content-type equal to "application/json", or
176 one of the accepted return formats. You can do this by setting it in your query
177 accepted return formats. You can do this by setting it in your query string
178 thusly: C<< ?content-type=application%2Fjson (where %2F == / uri escaped). >>
180 B<NOTE> Apache will refuse %2F unless configured otherise.
181 Make sure C<< AllowEncodedSlashes On >> is in your httpd.conf file in orde
182 for this to run smoothly.
198 Daisuke Maki <daisuke@endeworks.jp>
200 J. Shirley <jshirley@gmail.com>
202 Tomas Doran (t0m) <bobtfish@bobtfish.net>
206 Adam Jacob <adam@stalecoffee.org>, with lots of help from mst and jrockway
208 Marchex, Inc. paid me while I developed this module. (L<http://www.marchex.com>)
212 You may distribute this code under the same terms as Perl itself.