Commit | Line | Data |
256c894f |
1 | # |
2 | # REST.pm |
be3c588a |
3 | # Created by: Adam Jacob, Marchex, <adam@hjksolutions.com> |
256c894f |
4 | # Created on: 10/12/2006 03:00:32 PM PDT |
5 | # |
6 | # $Id$ |
7 | |
8 | package Catalyst::Action::REST; |
9 | |
10 | use strict; |
11 | use warnings; |
12 | |
13 | use base 'Catalyst::Action'; |
7ad87df9 |
14 | use Class::Inspector; |
9a76221e |
15 | use Catalyst::Request::REST; |
ebba5325 |
16 | use Catalyst::Controller::REST; |
17 | |
9c5c9bd1 |
18 | BEGIN { require 5.008001; } |
256c894f |
19 | |
db8bb647 |
20 | our $VERSION = '0.74'; |
9a76221e |
21 | |
5132f5e4 |
22 | sub new { |
23 | my $class = shift; |
24 | my $config = shift; |
37694e6c |
25 | Catalyst::Request::REST->_insert_self_into( $config->{class} ); |
e34b463b |
26 | return $class->next::method($config, @_); |
5132f5e4 |
27 | } |
7328f0ab |
28 | |
29 | =head1 NAME |
30 | |
31 | Catalyst::Action::REST - Automated REST Method Dispatching |
32 | |
33 | =head1 SYNOPSIS |
34 | |
5e87ec47 |
35 | sub foo :Local :ActionClass('REST') { |
36 | ... do setup for HTTP method specific handlers ... |
37 | } |
7328f0ab |
38 | |
afa581cf |
39 | sub foo_GET { |
7328f0ab |
40 | ... do something for GET requests ... |
41 | } |
42 | |
afa581cf |
43 | sub foo_PUT { |
7328f0ab |
44 | ... do somethign for PUT requests ... |
45 | } |
46 | |
47 | =head1 DESCRIPTION |
48 | |
49 | This Action handles doing automatic method dispatching for REST requests. It |
50 | takes a normal Catalyst action, and changes the dispatch to append an |
afa581cf |
51 | underscore and method name. |
7328f0ab |
52 | |
53 | For example, in the synopsis above, calling GET on "/foo" would result in |
54 | the foo_GET method being dispatched. |
55 | |
afa581cf |
56 | If a method is requested that is not implemented, this action will |
57 | return a status 405 (Method Not Found). It will populate the "Allow" header |
5e87ec47 |
58 | with the list of implemented request methods. You can override this behavior |
59 | by implementing a custom 405 handler like so: |
60 | |
61 | sub foo_not_implemented { |
62 | ... handle not implemented methods ... |
63 | } |
64 | |
65 | If you do not provide an _OPTIONS subroutine, we will automatically respond |
66 | with a 200 OK. The "Allow" header will be populated with the list of |
67 | implemented request methods. |
7328f0ab |
68 | |
5e87ec47 |
69 | It is likely that you really want to look at L<Catalyst::Controller::REST>, |
70 | which brings this class together with automatic Serialization of requests |
71 | and responses. |
398c5a1b |
72 | |
9a76221e |
73 | When you use this module, the request class will be changed to |
74 | L<Catalyst::Request::REST>. |
75 | |
7328f0ab |
76 | =head1 METHODS |
77 | |
78 | =over 4 |
79 | |
80 | =item dispatch |
81 | |
82 | This method overrides the default dispatch mechanism to the re-dispatching |
83 | mechanism described above. |
84 | |
85 | =cut |
d34c067a |
86 | |
256c894f |
87 | sub dispatch { |
bb4130f6 |
88 | my $self = shift; |
d34c067a |
89 | my $c = shift; |
256c894f |
90 | |
2f91bf68 |
91 | my $controller = $c->component( $self->class ); |
3faede66 |
92 | my $rest_method = $self->name . "_" . uc( $c->request->method ); |
679978b1 |
93 | |
3faede66 |
94 | my ($code, $name); |
679978b1 |
95 | |
3faede66 |
96 | # Common case, for foo_GET etc |
97 | if ($code = $controller->can($rest_method)) { |
98 | # Exceute normal action |
99 | $c->execute( $self->class, $self, @{ $c->req->args } ); |
100 | $name = $rest_method; |
256c894f |
101 | } |
3faede66 |
102 | |
103 | # Generic handling for foo_OPTIONS |
104 | if (!$code && $c->request->method eq "OPTIONS") { |
105 | $name = $rest_method; |
106 | $code = sub { $self->_return_options($self->name, @_) }; |
107 | } |
108 | |
109 | # Otherwise, not implemented. |
110 | if (!$code) { |
111 | $name = $self->name . "_not_implemented"; |
112 | $code = $controller->can($name) # User method |
113 | # Generic not implemented |
114 | || sub { $self->_return_not_implemented($self->name, @_) }; |
679978b1 |
115 | } |
256c894f |
116 | |
3faede66 |
117 | # localise stuff so we can dispatch the action 'as normal, but get |
118 | # different stats shown, and different code run. |
119 | local $self->{code} = $code; |
120 | local $self->{reverse} = $name; |
d34c067a |
121 | |
679978b1 |
122 | $c->execute( $self->class, $self, @{ $c->req->args } ); |
d34c067a |
123 | } |
124 | |
d2d93101 |
125 | sub _get_allowed_methods { |
126 | my ( $self, $controller, $c, $name ) = @_; |
679978b1 |
127 | my $class = ref($controller) ? ref($controller) : $controller; |
128 | my $methods = Class::Inspector->methods($class); |
7ad87df9 |
129 | my @allowed; |
eccb2137 |
130 | foreach my $method ( @{$methods} ) { |
eccb2137 |
131 | if ( $method =~ /^$name\_(.+)$/ ) { |
132 | push( @allowed, $1 ); |
7ad87df9 |
133 | } |
134 | } |
d34c067a |
135 | return @allowed; |
679978b1 |
136 | }; |
137 | |
138 | sub _return_options { |
3faede66 |
139 | my ( $self, $method_name, $controller, $c) = @_; |
d2d93101 |
140 | my @allowed = $self->_get_allowed_methods($controller, $c, $method_name); |
679978b1 |
141 | $c->response->content_type('text/plain'); |
142 | $c->response->status(200); |
143 | $c->response->header( 'Allow' => \@allowed ); |
d34c067a |
144 | } |
145 | |
146 | sub _return_not_implemented { |
3faede66 |
147 | my ( $self, $method_name, $controller, $c ) = @_; |
d34c067a |
148 | |
d2d93101 |
149 | my @allowed = $self->_get_allowed_methods($controller, $c, $method_name); |
7ad87df9 |
150 | $c->response->content_type('text/plain'); |
151 | $c->response->status(405); |
eccb2137 |
152 | $c->response->header( 'Allow' => \@allowed ); |
153 | $c->response->body( "Method " |
154 | . $c->request->method |
155 | . " not implemented for " |
679978b1 |
156 | . $c->uri_for( $method_name ) ); |
7ad87df9 |
157 | } |
158 | |
256c894f |
159 | 1; |
7328f0ab |
160 | |
161 | =back |
162 | |
163 | =head1 SEE ALSO |
164 | |
165 | You likely want to look at L<Catalyst::Controller::REST>, which implements |
166 | a sensible set of defaults for a controller doing REST. |
167 | |
168 | L<Catalyst::Action::Serialize>, L<Catalyst::Action::Deserialize> |
169 | |
5d7480da |
170 | =head1 TROUBLESHOOTING |
171 | |
172 | =over 4 |
173 | |
174 | =item Q: I'm getting a "415 Unsupported Media Type" error. What gives?! |
175 | |
69ad525b |
176 | A: Most likely, you haven't set Content-type equal to "application/json", or |
177 | one of the accepted return formats. You can do this by setting it in your query |
178 | accepted return formats. You can do this by setting it in your query string |
179 | thusly: C<< ?content-type=application%2Fjson (where %2F == / uri escaped). >> |
5d7480da |
180 | |
69ad525b |
181 | B<NOTE> Apache will refuse %2F unless configured otherise. |
182 | Make sure C<< AllowEncodedSlashes On >> is in your httpd.conf file in orde |
183 | for this to run smoothly. |
5d7480da |
184 | |
69ad525b |
185 | =back |
5d7480da |
186 | |
2f7533ed |
187 | =head1 CONTRIBUTORS |
398c5a1b |
188 | |
2f7533ed |
189 | Christopher Laco |
190 | |
191 | Luke Saunders |
192 | |
193 | John Goulah |
33e5de96 |
194 | |
195 | Daisuke Maki <daisuke@endeworks.jp> |
196 | |
97b3cf7c |
197 | J. Shirley <jshirley@gmail.com> |
198 | |
7580fa2b |
199 | Hans Dieter Pearcey |
200 | |
97b3cf7c |
201 | Tomas Doran (t0m) <bobtfish@bobtfish.net> |
202 | |
2f7533ed |
203 | =head1 AUTHOR |
204 | |
205 | Adam Jacob <adam@stalecoffee.org>, with lots of help from mst and jrockway |
206 | |
97b3cf7c |
207 | Marchex, Inc. paid me while I developed this module. (L<http://www.marchex.com>) |
2f7533ed |
208 | |
7328f0ab |
209 | =head1 LICENSE |
210 | |
211 | You may distribute this code under the same terms as Perl itself. |
212 | |
213 | =cut |
d34c067a |
214 | |