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',
29 sub DEMOLISH { $_[0]->_writer->close if $_[0]->_has_writer }
31 has cookies => (is => 'rw', default => sub { {} });
32 has body => (is => 'rw', default => undef);
33 sub has_body { defined($_[0]->body) }
35 has location => (is => 'rw');
36 has status => (is => 'rw', default => 200);
37 has finalized_headers => (is => 'rw', default => 0);
40 isa => 'HTTP::Headers',
41 handles => [qw(content_encoding content_length content_type header)],
42 default => sub { HTTP::Headers->new() },
47 sub output { shift->body(@_) }
49 sub code { shift->status(@_) }
52 my ( $self, $buffer ) = @_;
54 # Finalize headers if someone manually writes output
55 $self->finalize_headers;
57 $buffer = q[] unless defined $buffer;
59 my $len = length($buffer);
60 $self->_writer->write($buffer); # ignore PerlIO's LEN, [OFFSET] params
65 sub finalize_headers {
68 # This is a less-than-pretty hack to avoid breaking the old
69 # Catalyst::Engine::PSGI. 5.9 Catalyst::Engine sets a response_cb and
70 # expects us to pass headers to it here, whereas Catalyst::Engine::PSGI
71 # just pulls the headers out of $ctx->response in its run method and never
72 # sets response_cb. So take the lack of a response_cb as a sign that we
73 # don't need to set the headers.
75 return unless $self->_has_response_cb;
77 # If we already have a writer, we already did this, so don't do it again
78 return if $self->_has_writer;
81 $self->headers->scan(sub { push @headers, @_ });
83 my $writer = $self->_response_cb->([ $self->status, \@headers ]);
84 $self->_set_writer($writer);
85 $self->_clear_response_cb;
92 Catalyst::Response - stores output responding to the current client request
99 $res->content_encoding;
100 $res->content_length;
112 This is the Catalyst Response class, which provides methods for responding to
113 the current client request. The appropriate L<Catalyst::Engine> for your environment
114 will turn the Catalyst::Response into a HTTP Response and return it to the client.
118 =head2 $res->body( $text | $fh | $iohandle_object )
120 $c->response->body('Catalyst rocks!');
122 Sets or returns the output (text or binary data). If you are returning a large body,
123 you might want to use a L<IO::Handle> type of object (Something that implements the read method
124 in the same fashion), or a filehandle GLOB. Catalyst
125 will write it piece by piece into the response.
127 =head2 $res->has_body
129 Predicate which returns true when a body has been set.
133 Alias for $res->status.
135 =head2 $res->content_encoding
137 Shortcut for $res->headers->content_encoding.
139 =head2 $res->content_length
141 Shortcut for $res->headers->content_length.
143 =head2 $res->content_type
145 Shortcut for $res->headers->content_type.
147 This value is typically set by your view or plugin. For example,
148 L<Catalyst::Plugin::Static::Simple> will guess the mime type based on the file
149 it found, while L<Catalyst::View::TT> defaults to C<text/html>.
153 Returns a reference to a hash containing cookies to be set. The keys of the
154 hash are the cookies' names, and their corresponding values are hash
155 references used to construct a L<CGI::Simple::Cookie> object.
157 $c->response->cookies->{foo} = { value => '123' };
159 The keys of the hash reference on the right correspond to the L<CGI::Simple::Cookie>
160 parameters of the same name, except they are used without a leading dash.
161 Possible parameters are:
181 Shortcut for $res->headers->header.
185 Returns an L<HTTP::Headers> object, which can be used to set headers.
187 $c->response->headers->header( 'X-Catalyst' => $Catalyst::VERSION );
191 Alias for $res->body.
193 =head2 $res->redirect( $url, $status )
195 Causes the response to redirect to the specified URL. The default status is
198 $c->response->redirect( 'http://slashdot.org' );
199 $c->response->redirect( 'http://slashdot.org', 307 );
201 This is a convenience method that sets the Location header to the
202 redirect destination, and then sets the response status. You will
203 want to C< return > or C<< $c->detach() >> to interrupt the normal
204 processing flow if you want the redirect to occur straight away.
206 B<Note:> do not give a relative URL as $url, i.e: one that is not fully
207 qualified (= C<http://...>, etc.) or that starts with a slash
208 (= C</path/here>). While it may work, it is not guaranteed to do the right
209 thing and is not a standard behaviour. You may opt to use uri_for() or
210 uri_for_action() instead.
218 my $location = shift;
219 my $status = shift || 302;
221 $self->location($location);
222 $self->status($status);
225 return $self->location;
228 =head2 $res->location
230 Sets or returns the HTTP 'Location'.
234 Sets or returns the HTTP status.
236 $c->response->status(404);
238 $res->code is an alias for this, to match HTTP::Response->code.
240 =head2 $res->write( $data )
242 Writes $data to the output stream.
244 =head2 $self->finalize_headers($c)
246 Writes headers to response if not already written
250 Ensures that the response is flushed and closed at the end of the
257 =head1 IO::Handle METHODS
259 Certain other methods are provided to ensure (reasonable) compatibility
260 to other functions expecting a L<IO::Handle> object:
262 $res->open # ignores all params and calls $res->finalize_headers
264 $res->opened # auto-opens
266 $res->print( ARGS ) # uses $, & $\
267 $res->printf( FMT, [ARGS] )
269 $res->printflush( ARGS )
271 # these are checked for similar methods within the writer
272 $res->autoflush( [BOOL] ) # echos BOOL or 0 if method not found
273 $res->blocking( [BOOL] ) # echos BOOL or 1 if method not found
274 $res->binmode( [BOOL] ) # echos BOOL or 1 if method not found
275 $res->error # returns $! if method not found
276 $res->clearerr # clears $! and returns 0 if method not found
277 $res->sync # tries $res->flush if method not found
278 $res->flush # returns "0 but true" if method not found
280 =for Pod::Coverage open(ed)?|close|fileno|print(f?|flush)|say
285 # We are just going to blissfully ignore the params
288 $self->finalize_headers;
291 sub close { return shift->_has_writer && shift->_writer->close(); }
292 sub opened { return shift->open(); } # if it's asking, just open up the writer
293 sub fileno { return scalar shift->_writer; } # scalar reference comparison should be good enough
295 my ($self, @data) = (shift, @_);
297 # (var usage per Perl print docs)
298 @data = map { ($_, $,) } @data; # poor man's "array join"
299 splice(@data, -1, 1, $\) if (@data); # remove trailing sep + add $\
301 for (@data) { defined $self->write($_) or return; }
307 return $self->write( sprintf(@_) ); # per docs, printf doesn't use $/
312 return $self->print(@_);
316 my $af = $self->autoflush(1);
317 my $ret = $self->print(@_);
318 $self->autoflush($af);
322 # I/O method checking
324 my ($self, $method, $default, @data) = @_;
325 no strict 'refs'; # no complainy at CODEREFs
327 return $self->_has_writer && $self->_writer->can($method) ?
328 $self->_writer->$method(@data) :
329 ref $default eq 'CODE' ?
330 &$default($self) : # (kinda janky, but $self->$default isn't right either)
331 defined $data[0] ? $data[0] : $default # can't tell, but don't error on it, either (default action for booleans)
339 [error => sub { $! }],
340 [clearerr => sub { undef $! || 0 }], # 0 = don't error
341 [sync => sub { shift->flush() }], # fallback
342 [flush => sub { "0 but true" }], # don't error (but don't echo either, hence a CODEREF)
343 ) # $method $self @([$method, $default]), @data
344 { __PACKAGE__->meta->add_method($pair->[0], sub { shift->_attempt(@$pair, @_); }); }
348 Catalyst Contributors, see Catalyst.pm
352 This library is free software. You can redistribute it and/or modify
353 it under the same terms as Perl itself.
357 __PACKAGE__->meta->make_immutable;