1 package Catalyst::Response;
5 use Moose::Util::TypeConstraints;
6 use namespace::autoclean;
8 with 'MooseX::Emulate::Class::Accessor::Fast';
13 writer => '_set_response_cb',
14 clearer => '_clear_response_cb',
15 predicate => '_has_response_cb',
18 subtype 'Catalyst::Engine::Types::Writer',
19 as duck_type([qw(write close)]);
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
25 clearer => '_clear_writer',
26 predicate => '_has_writer',
28 builder => '_build_writer',
34 ## These two lines are probably crap now...
35 $self->_context->finalize_headers unless
36 $self->finalized_headers;
39 $self->headers->scan(sub { push @headers, @_ });
41 my $writer = $self->_response_cb->([ $self->status, \@headers ]);
42 $self->_clear_response_cb;
49 predicate=>'_has_write_fh',
51 builder=>'_build_write_fh',
54 sub _build_write_fh { shift ->_writer }
58 return if $self->_has_write_fh;
59 if($self->_has_writer) {
64 has cookies => (is => 'rw', default => sub { {} });
65 has body => (is => 'rw', default => undef);
66 sub has_body { defined($_[0]->body) }
68 has location => (is => 'rw');
69 has status => (is => 'rw', default => 200);
70 has finalized_headers => (is => 'rw', default => 0);
73 isa => 'HTTP::Headers',
74 handles => [qw(content_encoding content_length content_type header)],
75 default => sub { HTTP::Headers->new() },
82 clearer => '_clear_context',
85 sub output { shift->body(@_) }
87 sub code { shift->status(@_) }
90 my ( $self, $buffer ) = @_;
92 # Finalize headers if someone manually writes output
93 $self->_context->finalize_headers unless $self->finalized_headers;
95 $buffer = q[] unless defined $buffer;
97 my $len = length($buffer);
98 $self->_writer->write($buffer);
103 sub finalize_headers {
108 sub from_psgi_response {
109 my ($self, $psgi_res) = @_;
110 if(ref $psgi_res eq 'ARRAY') {
111 my ($status, $headers, $body) = @$psgi_res;
112 $self->status($status);
113 $self->headers(HTTP::Headers->new(@$headers));
115 } elsif(ref $psgi_res eq 'CODE') {
117 my $response = shift;
118 my ($status, $headers, $maybe_body) = @$response;
119 $self->status($status);
120 $self->headers(HTTP::Headers->new(@$headers));
121 if(defined $maybe_body) {
122 $self->body($maybe_body);
124 return $self->write_fh;
128 die "You can't set a Catalyst response from that, expect a valid PSGI response";
134 Catalyst::Response - stores output responding to the current client request
141 $res->content_encoding;
142 $res->content_length;
154 This is the Catalyst Response class, which provides methods for responding to
155 the current client request. The appropriate L<Catalyst::Engine> for your environment
156 will turn the Catalyst::Response into a HTTP Response and return it to the client.
160 =head2 $res->body( $text | $fh | $iohandle_object )
162 $c->response->body('Catalyst rocks!');
164 Sets or returns the output (text or binary data). If you are returning a large body,
165 you might want to use a L<IO::Handle> type of object (Something that implements the read method
166 in the same fashion), or a filehandle GLOB. Catalyst
167 will write it piece by piece into the response.
169 When using a L<IO::Handle> type of object and no content length has been
170 already set in the response headers Catalyst will make a reasonable attempt
171 to determine the size of the Handle. Depending on the implementation of your
172 handle object, setting the content length may fail. If it is at all possible
173 for you to determine the content length of your handle object,
174 it is recommended that you set the content length in the response headers
175 yourself, which will be respected and sent by Catalyst in the response.
177 =head2 $res->has_body
179 Predicate which returns true when a body has been set.
183 Alias for $res->status.
185 =head2 $res->content_encoding
187 Shortcut for $res->headers->content_encoding.
189 =head2 $res->content_length
191 Shortcut for $res->headers->content_length.
193 =head2 $res->content_type
195 Shortcut for $res->headers->content_type.
197 This value is typically set by your view or plugin. For example,
198 L<Catalyst::Plugin::Static::Simple> will guess the mime type based on the file
199 it found, while L<Catalyst::View::TT> defaults to C<text/html>.
203 Returns a reference to a hash containing cookies to be set. The keys of the
204 hash are the cookies' names, and their corresponding values are hash
205 references used to construct a L<CGI::Simple::Cookie> object.
207 $c->response->cookies->{foo} = { value => '123' };
209 The keys of the hash reference on the right correspond to the L<CGI::Simple::Cookie>
210 parameters of the same name, except they are used without a leading dash.
211 Possible parameters are:
231 Shortcut for $res->headers->header.
235 Returns an L<HTTP::Headers> object, which can be used to set headers.
237 $c->response->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
241 Alias for $res->body.
243 =head2 $res->redirect( $url, $status )
245 Causes the response to redirect to the specified URL. The default status is
248 $c->response->redirect( 'http://slashdot.org' );
249 $c->response->redirect( 'http://slashdot.org', 307 );
251 This is a convenience method that sets the Location header to the
252 redirect destination, and then sets the response status. You will
253 want to C< return > or C<< $c->detach() >> to interrupt the normal
254 processing flow if you want the redirect to occur straight away.
256 B<Note:> do not give a relative URL as $url, i.e: one that is not fully
257 qualified (= C<http://...>, etc.) or that starts with a slash
258 (= C</path/here>). While it may work, it is not guaranteed to do the right
259 thing and is not a standard behaviour. You may opt to use uri_for() or
260 uri_for_action() instead.
268 my $location = shift;
269 my $status = shift || 302;
271 $self->location($location);
272 $self->status($status);
275 return $self->location;
278 =head2 $res->location
280 Sets or returns the HTTP 'Location'.
284 Sets or returns the HTTP status.
286 $c->response->status(404);
288 $res->code is an alias for this, to match HTTP::Response->code.
290 =head2 $res->write( $data )
292 Writes $data to the output stream.
294 =head2 $res->write_fh
296 Returns a PSGI $writer object that has two methods, write and close. You can
297 close over this object for asynchronous and nonblocking applications. For
298 example (assuming you are using a supporting server, like L<Twiggy>
300 package AsyncExample::Controller::Root;
304 BEGIN { extends 'Catalyst::Controller' }
310 $write_fh->write("Finishing: $message\n");
315 sub anyevent :Local :Args(0) {
317 my $cb = $self->prepare_cb($c->res->write_fh);
320 $watcher = AnyEvent->timer(
323 $cb->(scalar localtime);
324 undef $watcher; # cancel circular-ref
328 =head2 $res->print( @data )
330 Prints @data to the output stream, separated by $,. This lets you pass
331 the response object to functions that want to write to an L<IO::Handle>.
333 =head2 $self->finalize_headers($c)
335 Writes headers to response if not already written
337 =head2 from_psgi_response
339 Given a PSGI response (either three element ARRAY reference OR coderef expecting
340 a $responder) set the response from it.
342 Properly supports streaming and delayed response and / or async IO if running
343 under an expected event loop.
347 package MyApp::Web::Controller::Test;
349 use base 'Catalyst::Controller';
350 use Plack::App::Directory;
353 my $app = Plack::App::Directory->new({ root => "/path/to/htdocs" })
356 sub myaction :Local Args {
358 $c->res->from_psgi_response($app->($c->req->env));
361 Please note this does not attempt to map or nest your PSGI application under
362 the Controller and Action namespace or path.
366 Ensures that the response is flushed and closed at the end of the
379 defined $self->write($data) or return;
382 defined $self->write($,) or return;
383 defined $self->write($_) or return;
385 defined $self->write($\) or return;
392 Catalyst Contributors, see Catalyst.pm
396 This library is free software. You can redistribute it and/or modify
397 it under the same terms as Perl itself.
401 __PACKAGE__->meta->make_immutable;