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fc7ec1d9 |
1 | package Catalyst::Response; |
2 | |
059c085b |
3 | use Moose; |
6680c772 |
4 | use HTTP::Headers; |
faa02805 |
5 | use Moose::Util::TypeConstraints; |
6 | use namespace::autoclean; |
fc7ec1d9 |
7 | |
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8 | with 'MooseX::Emulate::Class::Accessor::Fast'; |
9 | |
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10 | has _response_cb => ( |
11 | is => 'ro', |
46fff667 |
12 | isa => 'CodeRef', |
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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', |
46fff667 |
23 | isa => 'Catalyst::Engine::Types::Writer', #Pointless since we control how this is built |
24 | #writer => '_set_writer', Now that its lazy I think this is safe to remove |
faa02805 |
25 | clearer => '_clear_writer', |
26 | predicate => '_has_writer', |
46fff667 |
27 | lazy => 1, |
28 | builder => '_build_writer', |
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29 | ); |
30 | |
46fff667 |
31 | sub _build_writer { |
32 | my $self = shift; |
33 | |
34 | ## These two lines are probably crap now... |
35 | $self->_context->finalize_headers unless |
36 | $self->finalized_headers; |
37 | |
38 | my @headers; |
39 | $self->headers->scan(sub { push @headers, @_ }); |
40 | |
41 | my $writer = $self->_response_cb->([ $self->status, \@headers ]); |
42 | $self->_clear_response_cb; |
43 | |
44 | return $writer; |
45 | } |
46 | |
e37f92f5 |
47 | has write_fh => ( |
48 | is=>'ro', |
a3c9ab76 |
49 | predicate=>'_has_write_fh', |
eb1f4b49 |
50 | lazy=>1, |
1f2a8069 |
51 | builder=>'_build_write_fh', |
52 | ); |
53 | |
46fff667 |
54 | sub _build_write_fh { shift ->_writer } |
e37f92f5 |
55 | |
56 | sub DEMOLISH { |
57 | my $self = shift; |
a3c9ab76 |
58 | return if $self->_has_write_fh; |
e37f92f5 |
59 | if($self->_has_writer) { |
60 | $self->_writer->close |
61 | } |
62 | } |
faa02805 |
63 | |
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64 | has cookies => (is => 'rw', default => sub { {} }); |
ffb43803 |
65 | has body => (is => 'rw', default => undef); |
66 | sub has_body { defined($_[0]->body) } |
99a543ee |
67 | |
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68 | has location => (is => 'rw'); |
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69 | has status => (is => 'rw', default => 200); |
70 | has finalized_headers => (is => 'rw', default => 0); |
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71 | has headers => ( |
72 | is => 'rw', |
9c331634 |
73 | isa => 'HTTP::Headers', |
059c085b |
74 | handles => [qw(content_encoding content_length content_type header)], |
6680c772 |
75 | default => sub { HTTP::Headers->new() }, |
76 | required => 1, |
77 | lazy => 1, |
059c085b |
78 | ); |
258733f1 |
79 | has _context => ( |
80 | is => 'rw', |
81 | weak_ref => 1, |
82 | clearer => '_clear_context', |
83 | ); |
fc7ec1d9 |
84 | |
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85 | before [qw(status headers content_encoding content_length content_type header)] => sub { |
86 | my $self = shift; |
87 | |
88 | $self->_context->log->warn( |
89 | "Useless setting a header value after finalize_headers called." . |
90 | " Not what you want." ) |
91 | if ( $self->finalized_headers && @_ ); |
92 | }; |
93 | |
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94 | sub output { shift->body(@_) } |
95 | |
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96 | sub code { shift->status(@_) } |
97 | |
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98 | sub write { |
99 | my ( $self, $buffer ) = @_; |
100 | |
101 | # Finalize headers if someone manually writes output |
89ba65d5 |
102 | $self->_context->finalize_headers unless $self->finalized_headers; |
9c4288ea |
103 | |
104 | $buffer = q[] unless defined $buffer; |
105 | |
106 | my $len = length($buffer); |
107 | $self->_writer->write($buffer); |
108 | |
109 | return $len; |
110 | } |
111 | |
9c4288ea |
112 | sub finalize_headers { |
113 | my ($self) = @_; |
9c4288ea |
114 | return; |
115 | } |
116 | |
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117 | sub from_psgi_response { |
118 | my ($self, $psgi_res) = @_; |
119 | if(ref $psgi_res eq 'ARRAY') { |
120 | my ($status, $headers, $body) = @$psgi_res; |
121 | $self->status($status); |
4491e0cc |
122 | $self->headers(HTTP::Headers->new(@$headers)); |
8a3dcb98 |
123 | $self->body($body); |
e67f0874 |
124 | } elsif(ref $psgi_res eq 'CODE') { |
125 | $psgi_res->(sub { |
4491e0cc |
126 | my $response = shift; |
127 | my ($status, $headers, $maybe_body) = @$response; |
e67f0874 |
128 | $self->status($status); |
4491e0cc |
129 | $self->headers(HTTP::Headers->new(@$headers)); |
8a3dcb98 |
130 | if(defined $maybe_body) { |
131 | $self->body($maybe_body); |
e67f0874 |
132 | } else { |
133 | return $self->write_fh; |
134 | } |
4491e0cc |
135 | }); |
136 | } else { |
e67f0874 |
137 | die "You can't set a Catalyst response from that, expect a valid PSGI response"; |
138 | } |
139 | } |
140 | |
fc7ec1d9 |
141 | =head1 NAME |
142 | |
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143 | Catalyst::Response - stores output responding to the current client request |
fc7ec1d9 |
144 | |
145 | =head1 SYNOPSIS |
146 | |
fbcc39ad |
147 | $res = $c->response; |
148 | $res->body; |
aa9e8261 |
149 | $res->code; |
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150 | $res->content_encoding; |
151 | $res->content_length; |
152 | $res->content_type; |
153 | $res->cookies; |
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154 | $res->header; |
155 | $res->headers; |
156 | $res->output; |
157 | $res->redirect; |
158 | $res->status; |
159 | $res->write; |
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160 | |
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161 | =head1 DESCRIPTION |
162 | |
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163 | This is the Catalyst Response class, which provides methods for responding to |
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164 | the current client request. The appropriate L<Catalyst::Engine> for your environment |
165 | will turn the Catalyst::Response into a HTTP Response and return it to the client. |
b22c6668 |
166 | |
167 | =head1 METHODS |
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168 | |
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169 | =head2 $res->body( $text | $fh | $iohandle_object ) |
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170 | |
171 | $c->response->body('Catalyst rocks!'); |
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172 | |
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173 | Sets or returns the output (text or binary data). If you are returning a large body, |
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174 | you might want to use a L<IO::Handle> type of object (Something that implements the read method |
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175 | in the same fashion), or a filehandle GLOB. Catalyst |
176 | will write it piece by piece into the response. |
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177 | |
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178 | When using a L<IO::Handle> type of object and no content length has been |
179 | already set in the response headers Catalyst will make a reasonable attempt |
180 | to determine the size of the Handle. Depending on the implementation of your |
181 | handle object, setting the content length may fail. If it is at all possible |
182 | for you to determine the content length of your handle object, |
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183 | it is recommended that you set the content length in the response headers |
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184 | yourself, which will be respected and sent by Catalyst in the response. |
185 | |
02570318 |
186 | =head2 $res->has_body |
187 | |
188 | Predicate which returns true when a body has been set. |
189 | |
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190 | =head2 $res->code |
191 | |
192 | Alias for $res->status. |
193 | |
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194 | =head2 $res->content_encoding |
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195 | |
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196 | Shortcut for $res->headers->content_encoding. |
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197 | |
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198 | =head2 $res->content_length |
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199 | |
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200 | Shortcut for $res->headers->content_length. |
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201 | |
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202 | =head2 $res->content_type |
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203 | |
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204 | Shortcut for $res->headers->content_type. |
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205 | |
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206 | This value is typically set by your view or plugin. For example, |
207 | L<Catalyst::Plugin::Static::Simple> will guess the mime type based on the file |
208 | it found, while L<Catalyst::View::TT> defaults to C<text/html>. |
209 | |
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210 | =head2 $res->cookies |
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211 | |
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212 | Returns a reference to a hash containing cookies to be set. The keys of the |
213 | hash are the cookies' names, and their corresponding values are hash |
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214 | references used to construct a L<CGI::Simple::Cookie> object. |
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215 | |
216 | $c->response->cookies->{foo} = { value => '123' }; |
217 | |
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218 | The keys of the hash reference on the right correspond to the L<CGI::Simple::Cookie> |
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219 | parameters of the same name, except they are used without a leading dash. |
220 | Possible parameters are: |
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221 | |
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222 | =over |
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223 | |
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224 | =item value |
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225 | |
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226 | =item expires |
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227 | |
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228 | =item domain |
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229 | |
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230 | =item path |
231 | |
232 | =item secure |
233 | |
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234 | =item httponly |
235 | |
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236 | =back |
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237 | |
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238 | =head2 $res->header |
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239 | |
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240 | Shortcut for $res->headers->header. |
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241 | |
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242 | =head2 $res->headers |
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243 | |
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244 | Returns an L<HTTP::Headers> object, which can be used to set headers. |
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245 | |
246 | $c->response->headers->header( 'X-Catalyst' => $Catalyst::VERSION ); |
247 | |
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248 | =head2 $res->output |
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249 | |
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250 | Alias for $res->body. |
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251 | |
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252 | =head2 $res->redirect( $url, $status ) |
fc7ec1d9 |
253 | |
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254 | Causes the response to redirect to the specified URL. The default status is |
255 | C<302>. |
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256 | |
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257 | $c->response->redirect( 'http://slashdot.org' ); |
258 | $c->response->redirect( 'http://slashdot.org', 307 ); |
259 | |
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260 | This is a convenience method that sets the Location header to the |
261 | redirect destination, and then sets the response status. You will |
ee24f3a8 |
262 | want to C< return > or C<< $c->detach() >> to interrupt the normal |
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263 | processing flow if you want the redirect to occur straight away. |
264 | |
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265 | B<Note:> do not give a relative URL as $url, i.e: one that is not fully |
266 | qualified (= C<http://...>, etc.) or that starts with a slash |
267 | (= C</path/here>). While it may work, it is not guaranteed to do the right |
268 | thing and is not a standard behaviour. You may opt to use uri_for() or |
269 | uri_for_action() instead. |
270 | |
73a52566 |
271 | =cut |
272 | |
273 | sub redirect { |
274 | my $self = shift; |
fbcc39ad |
275 | |
276 | if (@_) { |
73a52566 |
277 | my $location = shift; |
f1bbebac |
278 | my $status = shift || 302; |
73a52566 |
279 | |
280 | $self->location($location); |
281 | $self->status($status); |
282 | } |
283 | |
284 | return $self->location; |
285 | } |
fc7ec1d9 |
286 | |
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287 | =head2 $res->location |
288 | |
289 | Sets or returns the HTTP 'Location'. |
290 | |
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291 | =head2 $res->status |
fc7ec1d9 |
292 | |
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293 | Sets or returns the HTTP status. |
fc7ec1d9 |
294 | |
295 | $c->response->status(404); |
aa9e8261 |
296 | |
297 | $res->code is an alias for this, to match HTTP::Response->code. |
b0ad47c1 |
298 | |
b5ecfcf0 |
299 | =head2 $res->write( $data ) |
fbcc39ad |
300 | |
301 | Writes $data to the output stream. |
302 | |
e37f92f5 |
303 | =head2 $res->write_fh |
304 | |
305 | Returns a PSGI $writer object that has two methods, write and close. You can |
306 | close over this object for asynchronous and nonblocking applications. For |
307 | example (assuming you are using a supporting server, like L<Twiggy> |
308 | |
309 | package AsyncExample::Controller::Root; |
310 | |
311 | use Moose; |
312 | |
313 | BEGIN { extends 'Catalyst::Controller' } |
314 | |
315 | sub prepare_cb { |
316 | my $write_fh = pop; |
317 | return sub { |
318 | my $message = shift; |
319 | $write_fh->write("Finishing: $message\n"); |
320 | $write_fh->close; |
321 | }; |
322 | } |
323 | |
324 | sub anyevent :Local :Args(0) { |
325 | my ($self, $c) = @_; |
326 | my $cb = $self->prepare_cb($c->res->write_fh); |
327 | |
328 | my $watcher; |
329 | $watcher = AnyEvent->timer( |
330 | after => 5, |
331 | cb => sub { |
332 | $cb->(scalar localtime); |
333 | undef $watcher; # cancel circular-ref |
334 | }); |
335 | } |
336 | |
e4cc83b2 |
337 | =head2 $res->print( @data ) |
338 | |
339 | Prints @data to the output stream, separated by $,. This lets you pass |
340 | the response object to functions that want to write to an L<IO::Handle>. |
341 | |
8738b8fe |
342 | =head2 $self->finalize_headers($c) |
343 | |
344 | Writes headers to response if not already written |
345 | |
e67f0874 |
346 | =head2 from_psgi_response |
347 | |
348 | Given a PSGI response (either three element ARRAY reference OR coderef expecting |
349 | a $responder) set the response from it. |
350 | |
351 | Properly supports streaming and delayed response and / or async IO if running |
352 | under an expected event loop. |
353 | |
354 | Example: |
355 | |
356 | package MyApp::Web::Controller::Test; |
357 | |
358 | use base 'Catalyst::Controller'; |
359 | use Plack::App::Directory; |
360 | |
361 | |
362 | my $app = Plack::App::Directory->new({ root => "/path/to/htdocs" }) |
363 | ->to_app; |
364 | |
365 | sub myaction :Local Args { |
366 | my ($self, $c) = @_; |
faa1bcff |
367 | $c->res->from_psgi_response($app->($c->req->env)); |
e67f0874 |
368 | } |
369 | |
370 | Please note this does not attempt to map or nest your PSGI application under |
371 | the Controller and Action namespace or path. |
372 | |
faa02805 |
373 | =head2 DEMOLISH |
374 | |
375 | Ensures that the response is flushed and closed at the end of the |
376 | request. |
377 | |
378 | =head2 meta |
379 | |
380 | Provided by Moose |
381 | |
e4cc83b2 |
382 | =cut |
383 | |
384 | sub print { |
385 | my $self = shift; |
386 | my $data = shift; |
387 | |
388 | defined $self->write($data) or return; |
389 | |
390 | for (@_) { |
391 | defined $self->write($,) or return; |
392 | defined $self->write($_) or return; |
393 | } |
fe3083a8 |
394 | defined $self->write($\) or return; |
b0ad47c1 |
395 | |
e4cc83b2 |
396 | return 1; |
397 | } |
398 | |
910410b8 |
399 | =head1 AUTHORS |
fc7ec1d9 |
400 | |
2f381252 |
401 | Catalyst Contributors, see Catalyst.pm |
fc7ec1d9 |
402 | |
403 | =head1 COPYRIGHT |
404 | |
b0ad47c1 |
405 | This library is free software. You can redistribute it and/or modify |
61b1e958 |
406 | it under the same terms as Perl itself. |
fc7ec1d9 |
407 | |
408 | =cut |
409 | |
e5ecd5bc |
410 | __PACKAGE__->meta->make_immutable; |
411 | |
fc7ec1d9 |
412 | 1; |