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1 | package Catalyst::Action::SerializeBase; |
2 | |
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3 | use Moose; |
4 | use namespace::autoclean; |
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5 | |
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6 | extends 'Catalyst::Action'; |
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7 | use Module::Pluggable::Object; |
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8 | use Catalyst::Request::REST; |
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9 | use Catalyst::Utils (); |
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10 | |
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11 | after BUILDARGS => sub { |
12 | my $class = shift; |
13 | my $config = shift; |
14 | Catalyst::Request::REST->_insert_self_into( $config->{class} ); |
15 | }; |
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16 | |
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17 | has [qw(_serialize_plugins _loaded_plugins)] => ( is => 'rw' ); |
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18 | |
19 | sub _load_content_plugins { |
20 | my $self = shift; |
21 | my ( $search_path, $controller, $c ) = @_; |
22 | |
23 | unless ( defined( $self->_loaded_plugins ) ) { |
24 | $self->_loaded_plugins( {} ); |
25 | } |
26 | |
27 | # Load the Serialize Classes |
28 | unless ( defined( $self->_serialize_plugins ) ) { |
29 | my @plugins; |
30 | my $mpo = |
31 | Module::Pluggable::Object->new( 'search_path' => [$search_path], ); |
32 | @plugins = $mpo->plugins; |
33 | $self->_serialize_plugins( \@plugins ); |
34 | } |
35 | |
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36 | # Finally, we load the class. If you have a default serializer, |
37 | # and we still don't have a content-type that exists in the map, |
38 | # we'll use it. |
39 | my $sclass = $search_path . "::"; |
40 | my $sarg; |
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41 | my $map; |
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42 | |
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43 | my $config; |
44 | |
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45 | if ( exists $controller->{'serialize'} ) { |
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46 | $c->log->info("Catalyst::Action::REST - deprecated use of 'serialize' for configuration."); |
47 | $c->log->info("Please see 'CONFIGURATION' in Catalyst::Controller::REST."); |
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48 | $config = $controller->{'serialize'}; |
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49 | # if they're using the deprecated config, they may be expecting a |
50 | # default mapping too. |
51 | $config->{map} ||= $controller->{map}; |
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52 | } else { |
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53 | $config = $controller; |
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54 | } |
55 | $map = $config->{'map'}; |
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56 | |
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57 | # pick preferred content type |
58 | my @accepted_types; # priority order, best first |
59 | # give top priority to content type specified by stash, if any |
60 | my $content_type_stash_key = $config->{content_type_stash_key}; |
61 | if ($content_type_stash_key |
62 | and my $stashed = $c->stash->{$content_type_stash_key} |
63 | ) { |
64 | # convert to array if not already a ref |
65 | $stashed = [ $stashed ] if not ref $stashed; |
66 | push @accepted_types, @$stashed; |
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67 | } |
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68 | # then content types requested by caller |
69 | push @accepted_types, @{ $c->request->accepted_content_types }; |
70 | # then the default |
71 | push @accepted_types, $config->{'default'} if $config->{'default'}; |
72 | # pick the best match that we have a serializer mapping for |
73 | my ($content_type) = grep { $map->{$_} } @accepted_types; |
74 | |
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75 | return $self->unsupported_media_type($c, $content_type) |
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76 | if not $content_type; |
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77 | |
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78 | # carp about old text/x-json |
79 | if ($content_type eq 'text/x-json') { |
80 | $c->log->info('Using deprecated text/x-json content-type.'); |
81 | $c->log->info('Use application/json instead!'); |
82 | } |
83 | |
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84 | if ( exists( $map->{$content_type} ) ) { |
85 | my $mc; |
86 | if ( ref( $map->{$content_type} ) eq "ARRAY" ) { |
87 | $mc = $map->{$content_type}->[0]; |
88 | $sarg = $map->{$content_type}->[1]; |
89 | } else { |
90 | $mc = $map->{$content_type}; |
91 | } |
92 | # TODO: Handle custom serializers more elegantly.. this is a start, |
93 | # but how do we determine which is Serialize and Deserialize? |
94 | #if ($mc =~ /^+/) { |
95 | # $sclass = $mc; |
96 | # $sclass =~ s/^+//g; |
97 | #} else { |
98 | $sclass .= $mc; |
99 | #} |
100 | if ( !grep( /^$sclass$/, @{ $self->_serialize_plugins } ) ) { |
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101 | return $self->unsupported_media_type($c, $content_type); |
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102 | } |
103 | } else { |
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104 | return $self->unsupported_media_type($c, $content_type); |
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105 | } |
106 | unless ( exists( $self->_loaded_plugins->{$sclass} ) ) { |
107 | my $load_class = $sclass; |
108 | $load_class =~ s/::/\//g; |
109 | $load_class =~ s/$/.pm/g; |
110 | eval { require $load_class; }; |
111 | if ($@) { |
112 | $c->log->error( |
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113 | "Error loading $sclass for " . $content_type . ": $!" ); |
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114 | return $self->unsupported_media_type($c, $content_type); |
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115 | } else { |
116 | $self->_loaded_plugins->{$sclass} = 1; |
117 | } |
118 | } |
119 | |
120 | if ($search_path eq "Catalyst::Action::Serialize") { |
121 | if ($content_type) { |
122 | $c->response->header( 'Vary' => 'Content-Type' ); |
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123 | } elsif ($c->request->accept_only) { |
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124 | $c->response->header( 'Vary' => 'Accept' ); |
125 | } |
126 | $c->response->content_type($content_type); |
127 | } |
128 | |
129 | return $sclass, $sarg, $content_type; |
130 | } |
131 | |
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132 | sub unsupported_media_type { |
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133 | my ( $self, $c, $content_type ) = @_; |
134 | $c->res->content_type('text/plain'); |
135 | $c->res->status(415); |
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136 | if (defined($content_type) && $content_type ne "") { |
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137 | $c->res->body( |
138 | "Content-Type " . $content_type . " is not supported.\r\n" ); |
139 | } else { |
140 | $c->res->body( |
141 | "Cannot find a Content-Type supported by your client.\r\n" ); |
142 | } |
143 | return undef; |
144 | } |
145 | |
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146 | sub serialize_bad_request { |
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147 | my ( $self, $c, $content_type, $error ) = @_; |
148 | $c->res->content_type('text/plain'); |
149 | $c->res->status(400); |
150 | $c->res->body( |
151 | "Content-Type " . $content_type . " had a problem with your request.\r\n***ERROR***\r\n$error" ); |
152 | return undef; |
153 | } |
154 | |
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155 | __PACKAGE__->meta->make_immutable; |
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156 | |
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157 | 1; |
158 | |
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159 | =head1 NAME |
160 | |
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161 | Catalyst::Action::SerializeBase - Base class for Catalyst::Action::Serialize and Catlayst::Action::Deserialize. |
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162 | |
163 | =head1 DESCRIPTION |
164 | |
165 | This module implements the plugin loading and content-type negotiating |
166 | code for L<Catalyst::Action::Serialize> and L<Catalyst::Action::Deserialize>. |
167 | |
168 | =head1 SEE ALSO |
169 | |
170 | L<Catalyst::Action::Serialize>, L<Catalyst::Action::Deserialize>, |
171 | L<Catalyst::Controller::REST>, |
172 | |
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173 | =head1 AUTHORS |
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174 | |
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175 | See L<Catalyst::Action::REST> for authors. |
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176 | |
177 | =head1 LICENSE |
178 | |
179 | You may distribute this code under the same terms as Perl itself. |
180 | |
181 | =cut |