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',
24 writer => '_set_writer',
25 clearer => '_clear_writer',
26 predicate => '_has_writer',
31 predicate=>'has_write_fh',
33 builder=>'_build_write_fh',
38 $self->_context->finalize_headers unless
39 $self->finalized_headers;
45 return if $self->has_write_fh;
46 if($self->_has_writer) {
51 has cookies => (is => 'rw', default => sub { {} });
52 has body => (is => 'rw', default => undef);
53 sub has_body { defined($_[0]->body) }
55 has location => (is => 'rw');
56 has status => (is => 'rw', default => 200);
57 has finalized_headers => (is => 'rw', default => 0);
60 isa => 'HTTP::Headers',
61 handles => [qw(content_encoding content_length content_type header)],
62 default => sub { HTTP::Headers->new() },
69 clearer => '_clear_context',
72 sub output { shift->body(@_) }
74 sub code { shift->status(@_) }
77 my ( $self, $buffer ) = @_;
79 # Finalize headers if someone manually writes output
80 $self->_context->finalize_headers unless $self->finalized_headers;
82 $buffer = q[] unless defined $buffer;
84 my $len = length($buffer);
85 $self->_writer->write($buffer);
90 sub finalize_headers {
93 # This is a less-than-pretty hack to avoid breaking the old
94 # Catalyst::Engine::PSGI. 5.9 Catalyst::Engine sets a response_cb and
95 # expects us to pass headers to it here, whereas Catalyst::Enngine::PSGI
96 # just pulls the headers out of $ctx->response in its run method and never
97 # sets response_cb. So take the lack of a response_cb as a sign that we
98 # don't need to set the headers.
100 return unless $self->_has_response_cb;
102 # If we already have a writer, we already did this, so don't do it again
103 return if $self->_has_writer;
106 $self->headers->scan(sub { push @headers, @_ });
108 my $writer = $self->_response_cb->([ $self->status, \@headers ]);
109 $self->_set_writer($writer);
110 $self->_clear_response_cb;
115 sub from_psgi_response {
116 my ($self, $psgi_res) = @_;
117 if(ref $psgi_res eq 'ARRAY') {
118 my ($status, $headers, $body) = @$psgi_res;
119 $self->status($status);
120 $self->headers($headers);
121 if(ref $body eq 'ARRAY') {
122 $self->body(join '', grep defined, @$body);
126 } elsif(ref $psgi_res eq 'CODE') {
128 my ($status, $headers, $maybe_body) = @_;
129 $self->status($status);
130 $self->headers($headers);
132 if(ref $maybe_body eq 'ARRAY') {
133 $self->body(join '', grep defined, @$maybe_body);
135 $self->body($maybe_body);
138 return $self->write_fh;
142 die "You can't set a Catalyst response from that, expect a valid PSGI response";
148 Catalyst::Response - stores output responding to the current client request
155 $res->content_encoding;
156 $res->content_length;
168 This is the Catalyst Response class, which provides methods for responding to
169 the current client request. The appropriate L<Catalyst::Engine> for your environment
170 will turn the Catalyst::Response into a HTTP Response and return it to the client.
174 =head2 $res->body( $text | $fh | $iohandle_object )
176 $c->response->body('Catalyst rocks!');
178 Sets or returns the output (text or binary data). If you are returning a large body,
179 you might want to use a L<IO::Handle> type of object (Something that implements the read method
180 in the same fashion), or a filehandle GLOB. Catalyst
181 will write it piece by piece into the response.
183 =head2 $res->has_body
185 Predicate which returns true when a body has been set.
189 Alias for $res->status.
191 =head2 $res->content_encoding
193 Shortcut for $res->headers->content_encoding.
195 =head2 $res->content_length
197 Shortcut for $res->headers->content_length.
199 =head2 $res->content_type
201 Shortcut for $res->headers->content_type.
203 This value is typically set by your view or plugin. For example,
204 L<Catalyst::Plugin::Static::Simple> will guess the mime type based on the file
205 it found, while L<Catalyst::View::TT> defaults to C<text/html>.
209 Returns a reference to a hash containing cookies to be set. The keys of the
210 hash are the cookies' names, and their corresponding values are hash
211 references used to construct a L<CGI::Simple::Cookie> object.
213 $c->response->cookies->{foo} = { value => '123' };
215 The keys of the hash reference on the right correspond to the L<CGI::Simple::Cookie>
216 parameters of the same name, except they are used without a leading dash.
217 Possible parameters are:
237 Shortcut for $res->headers->header.
241 Returns an L<HTTP::Headers> object, which can be used to set headers.
243 $c->response->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
247 Alias for $res->body.
249 =head2 $res->redirect( $url, $status )
251 Causes the response to redirect to the specified URL. The default status is
254 $c->response->redirect( 'http://slashdot.org' );
255 $c->response->redirect( 'http://slashdot.org', 307 );
257 This is a convenience method that sets the Location header to the
258 redirect destination, and then sets the response status. You will
259 want to C< return > or C<< $c->detach() >> to interrupt the normal
260 processing flow if you want the redirect to occur straight away.
262 B<Note:> do not give a relative URL as $url, i.e: one that is not fully
263 qualified (= C<http://...>, etc.) or that starts with a slash
264 (= C</path/here>). While it may work, it is not guaranteed to do the right
265 thing and is not a standard behaviour. You may opt to use uri_for() or
266 uri_for_action() instead.
274 my $location = shift;
275 my $status = shift || 302;
277 $self->location($location);
278 $self->status($status);
281 return $self->location;
284 =head2 $res->location
286 Sets or returns the HTTP 'Location'.
290 Sets or returns the HTTP status.
292 $c->response->status(404);
294 $res->code is an alias for this, to match HTTP::Response->code.
296 =head2 $res->write( $data )
298 Writes $data to the output stream.
300 =head2 $res->write_fh
302 Returns a PSGI $writer object that has two methods, write and close. You can
303 close over this object for asynchronous and nonblocking applications. For
304 example (assuming you are using a supporting server, like L<Twiggy>
306 package AsyncExample::Controller::Root;
310 BEGIN { extends 'Catalyst::Controller' }
316 $write_fh->write("Finishing: $message\n");
321 sub anyevent :Local :Args(0) {
323 my $cb = $self->prepare_cb($c->res->write_fh);
326 $watcher = AnyEvent->timer(
329 $cb->(scalar localtime);
330 undef $watcher; # cancel circular-ref
334 =head2 $res->print( @data )
336 Prints @data to the output stream, separated by $,. This lets you pass
337 the response object to functions that want to write to an L<IO::Handle>.
339 =head2 $self->finalize_headers($c)
341 Writes headers to response if not already written
343 =head2 from_psgi_response
345 Given a PSGI response (either three element ARRAY reference OR coderef expecting
346 a $responder) set the response from it.
348 Properly supports streaming and delayed response and / or async IO if running
349 under an expected event loop.
353 package MyApp::Web::Controller::Test;
355 use base 'Catalyst::Controller';
356 use Plack::App::Directory;
359 my $app = Plack::App::Directory->new({ root => "/path/to/htdocs" })
362 sub myaction :Local Args {
364 $c->res->from_psgi_response($app->($self->env));
367 Please note this does not attempt to map or nest your PSGI application under
368 the Controller and Action namespace or path.
372 Ensures that the response is flushed and closed at the end of the
385 defined $self->write($data) or return;
388 defined $self->write($,) or return;
389 defined $self->write($_) or return;
391 defined $self->write($\) or return;
398 Catalyst Contributors, see Catalyst.pm
402 This library is free software. You can redistribute it and/or modify
403 it under the same terms as Perl itself.
407 __PACKAGE__->meta->make_immutable;