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1 | package Catalyst::Response; |
2 | |
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3 | use Moose; |
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4 | use HTTP::Headers; |
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5 | use Moose::Util::TypeConstraints; |
6 | use namespace::autoclean; |
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7 | |
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8 | with 'MooseX::Emulate::Class::Accessor::Fast'; |
9 | |
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10 | has _response_cb => ( |
11 | is => 'ro', |
12 | isa => 'CodeRef', |
13 | writer => '_set_response_cb', |
14 | clearer => '_clear_response_cb', |
15 | predicate => '_has_response_cb', |
16 | ); |
17 | |
18 | subtype 'Catalyst::Engine::Types::Writer', |
19 | as duck_type([qw(write close)]); |
20 | |
21 | has _writer => ( |
22 | is => 'ro', |
23 | isa => 'Catalyst::Engine::Types::Writer', |
24 | writer => '_set_writer', |
25 | clearer => '_clear_writer', |
26 | predicate => '_has_writer', |
27 | ); |
28 | |
29 | sub DEMOLISH { $_[0]->_writer->close if $_[0]->_has_writer } |
30 | |
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31 | has cookies => (is => 'rw', default => sub { {} }); |
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32 | has body => (is => 'rw', default => undef); |
33 | sub has_body { defined($_[0]->body) } |
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34 | |
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35 | has location => (is => 'rw'); |
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36 | has status => (is => 'rw', default => 200); |
37 | has finalized_headers => (is => 'rw', default => 0); |
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38 | has headers => ( |
39 | is => 'rw', |
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40 | isa => 'HTTP::Headers', |
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41 | handles => [qw(content_encoding content_length content_type header)], |
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42 | default => sub { HTTP::Headers->new() }, |
43 | required => 1, |
44 | lazy => 1, |
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45 | ); |
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46 | has _context => ( |
47 | is => 'rw', |
48 | weak_ref => 1, |
49 | clearer => '_clear_context', |
50 | ); |
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51 | |
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52 | sub output { shift->body(@_) } |
53 | |
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54 | sub code { shift->status(@_) } |
55 | |
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56 | sub write { |
57 | my ( $self, $buffer ) = @_; |
58 | |
59 | # Finalize headers if someone manually writes output |
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60 | $self->_context->finalize_headers unless $self->finalized_headers; |
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61 | |
62 | $buffer = q[] unless defined $buffer; |
63 | |
64 | my $len = length($buffer); |
65 | $self->_writer->write($buffer); |
66 | |
67 | return $len; |
68 | } |
69 | |
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70 | sub finalize_headers { |
71 | my ($self) = @_; |
72 | |
73 | # This is a less-than-pretty hack to avoid breaking the old |
74 | # Catalyst::Engine::PSGI. 5.9 Catalyst::Engine sets a response_cb and |
75 | # expects us to pass headers to it here, whereas Catalyst::Enngine::PSGI |
76 | # just pulls the headers out of $ctx->response in its run method and never |
77 | # sets response_cb. So take the lack of a response_cb as a sign that we |
78 | # don't need to set the headers. |
79 | |
80 | return unless $self->_has_response_cb; |
81 | |
82 | # If we already have a writer, we already did this, so don't do it again |
83 | return if $self->_has_writer; |
84 | |
85 | my @headers; |
86 | $self->headers->scan(sub { push @headers, @_ }); |
87 | |
88 | my $writer = $self->_response_cb->([ $self->status, \@headers ]); |
89 | $self->_set_writer($writer); |
90 | $self->_clear_response_cb; |
91 | |
92 | return; |
93 | } |
94 | |
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95 | =head1 NAME |
96 | |
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97 | Catalyst::Response - stores output responding to the current client request |
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98 | |
99 | =head1 SYNOPSIS |
100 | |
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101 | $res = $c->response; |
102 | $res->body; |
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103 | $res->code; |
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104 | $res->content_encoding; |
105 | $res->content_length; |
106 | $res->content_type; |
107 | $res->cookies; |
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108 | $res->header; |
109 | $res->headers; |
110 | $res->output; |
111 | $res->redirect; |
112 | $res->status; |
113 | $res->write; |
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114 | |
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115 | =head1 DESCRIPTION |
116 | |
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117 | This is the Catalyst Response class, which provides methods for responding to |
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118 | the current client request. The appropriate L<Catalyst::Engine> for your environment |
119 | will turn the Catalyst::Response into a HTTP Response and return it to the client. |
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120 | |
121 | =head1 METHODS |
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122 | |
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123 | =head2 $res->body( $text | $fh | $iohandle_object ) |
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124 | |
125 | $c->response->body('Catalyst rocks!'); |
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126 | |
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127 | Sets or returns the output (text or binary data). If you are returning a large body, |
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128 | you might want to use a L<IO::Handle> type of object (Something that implements the read method |
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129 | in the same fashion), or a filehandle GLOB. Catalyst |
130 | will write it piece by piece into the response. |
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131 | |
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132 | =head2 $res->has_body |
133 | |
134 | Predicate which returns true when a body has been set. |
135 | |
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136 | =head2 $res->code |
137 | |
138 | Alias for $res->status. |
139 | |
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140 | =head2 $res->content_encoding |
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141 | |
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142 | Shortcut for $res->headers->content_encoding. |
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143 | |
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144 | =head2 $res->content_length |
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145 | |
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146 | Shortcut for $res->headers->content_length. |
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147 | |
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148 | =head2 $res->content_type |
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149 | |
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150 | Shortcut for $res->headers->content_type. |
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151 | |
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152 | This value is typically set by your view or plugin. For example, |
153 | L<Catalyst::Plugin::Static::Simple> will guess the mime type based on the file |
154 | it found, while L<Catalyst::View::TT> defaults to C<text/html>. |
155 | |
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156 | =head2 $res->cookies |
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157 | |
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158 | Returns a reference to a hash containing cookies to be set. The keys of the |
159 | hash are the cookies' names, and their corresponding values are hash |
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160 | references used to construct a L<CGI::Simple::Cookie> object. |
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161 | |
162 | $c->response->cookies->{foo} = { value => '123' }; |
163 | |
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164 | The keys of the hash reference on the right correspond to the L<CGI::Simple::Cookie> |
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165 | parameters of the same name, except they are used without a leading dash. |
166 | Possible parameters are: |
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167 | |
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168 | =over |
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169 | |
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170 | =item value |
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171 | |
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172 | =item expires |
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173 | |
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174 | =item domain |
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175 | |
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176 | =item path |
177 | |
178 | =item secure |
179 | |
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180 | =item httponly |
181 | |
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182 | =back |
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183 | |
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184 | =head2 $res->header |
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185 | |
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186 | Shortcut for $res->headers->header. |
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187 | |
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188 | =head2 $res->headers |
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189 | |
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190 | Returns an L<HTTP::Headers> object, which can be used to set headers. |
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191 | |
192 | $c->response->headers->header( 'X-Catalyst' => $Catalyst::VERSION ); |
193 | |
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194 | =head2 $res->output |
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195 | |
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196 | Alias for $res->body. |
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197 | |
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198 | =head2 $res->redirect( $url, $status ) |
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199 | |
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200 | Causes the response to redirect to the specified URL. The default status is |
201 | C<302>. |
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202 | |
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203 | $c->response->redirect( 'http://slashdot.org' ); |
204 | $c->response->redirect( 'http://slashdot.org', 307 ); |
205 | |
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206 | This is a convenience method that sets the Location header to the |
207 | redirect destination, and then sets the response status. You will |
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208 | want to C< return > or C<< $c->detach() >> to interrupt the normal |
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209 | processing flow if you want the redirect to occur straight away. |
210 | |
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211 | B<Note:> do not give a relative URL as $url, i.e: one that is not fully |
212 | qualified (= C<http://...>, etc.) or that starts with a slash |
213 | (= C</path/here>). While it may work, it is not guaranteed to do the right |
214 | thing and is not a standard behaviour. You may opt to use uri_for() or |
215 | uri_for_action() instead. |
216 | |
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217 | =cut |
218 | |
219 | sub redirect { |
220 | my $self = shift; |
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221 | |
222 | if (@_) { |
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223 | my $location = shift; |
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224 | my $status = shift || 302; |
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225 | |
226 | $self->location($location); |
227 | $self->status($status); |
228 | } |
229 | |
230 | return $self->location; |
231 | } |
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232 | |
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233 | =head2 $res->location |
234 | |
235 | Sets or returns the HTTP 'Location'. |
236 | |
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237 | =head2 $res->status |
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238 | |
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239 | Sets or returns the HTTP status. |
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240 | |
241 | $c->response->status(404); |
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242 | |
243 | $res->code is an alias for this, to match HTTP::Response->code. |
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244 | |
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245 | =head2 $res->write( $data ) |
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246 | |
247 | Writes $data to the output stream. |
248 | |
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249 | =head2 $res->print( @data ) |
250 | |
251 | Prints @data to the output stream, separated by $,. This lets you pass |
252 | the response object to functions that want to write to an L<IO::Handle>. |
253 | |
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254 | =head2 $self->finalize_headers($c) |
255 | |
256 | Writes headers to response if not already written |
257 | |
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258 | =head2 DEMOLISH |
259 | |
260 | Ensures that the response is flushed and closed at the end of the |
261 | request. |
262 | |
263 | =head2 meta |
264 | |
265 | Provided by Moose |
266 | |
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267 | =cut |
268 | |
269 | sub print { |
270 | my $self = shift; |
271 | my $data = shift; |
272 | |
273 | defined $self->write($data) or return; |
274 | |
275 | for (@_) { |
276 | defined $self->write($,) or return; |
277 | defined $self->write($_) or return; |
278 | } |
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279 | defined $self->write($\) or return; |
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280 | |
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281 | return 1; |
282 | } |
283 | |
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284 | =head1 AUTHORS |
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285 | |
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286 | Catalyst Contributors, see Catalyst.pm |
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287 | |
288 | =head1 COPYRIGHT |
289 | |
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290 | This library is free software. You can redistribute it and/or modify |
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291 | it under the same terms as Perl itself. |
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292 | |
293 | =cut |
294 | |
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295 | __PACKAGE__->meta->make_immutable; |
296 | |
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297 | 1; |