1 package Catalyst::View::ContentNegotiation::XHTML;
4 use MooseX::Types::Moose qw/Num Str ArrayRef/;
5 use MooseX::Types::Structured qw/Tuple/;
6 use HTTP::Negotiate qw/choose/;
8 use namespace::clean -except => 'meta';
10 our $VERSION = '1.100';
14 isa => ArrayRef[Tuple[Str, Num, Str]],
16 builder => '_build_variants',
21 [qw| xhtml 1.000 application/xhtml+xml |],
22 [qw| html 0.900 text/html |],
26 after process => sub {
28 if ($c->request->header('Accept') && $c->response->headers->{'content-type'} =~ m|text/html|) {
29 $self->pragmatic_accept($c);
30 my $var = choose($self->variants, $c->request->headers);
31 if ($var eq 'xhtml') {
32 $c->response->headers->{'content-type'} =~ s|text/html|application/xhtml+xml|;
37 sub pragmatic_accept {
39 my $accept = $c->request->header('Accept');
40 if ($accept =~ m|text/html|) {
41 $accept =~ s!\*/\*\s*([,]+|$)!*/*;q=0.5$1!;
43 $accept =~ s!\*/\*\s*([,]+|$)!text/html,*/*;q=0.5$1!;
45 $c->request->header('Accept' => $accept);
54 Catalyst::View::ContentNegotiation::XHTML - A Moose Role to apply to
55 Catalyst views adjusts the response Content-Type header to
56 application/xhtml+xml content if the browser accepts it.
60 package Catalyst::View::TT;
63 use namespace::clean -except => 'meta';
65 extends qw/Catalyst::View::TT/;
66 with qw/Catalyst::View::ContentNegotiation::XHTML/;
72 This is a very simple Role which uses a method modifier to run after the
73 C<process> method, and sets the response C<Content-Type> to be
74 C<application/xhtml+xml> if the users browser sends an C<Accept> header
75 indicating that it is willing to process that MIME type.
77 Changing the C<Content-Type> causes browsers to interpret the page as
78 XML, meaning that the markup must be well formed.
80 This is useful when you're developing your application, as you know that
81 all pages you view are parsed as XML, so any errors caused by your markup
82 not being well-formed will show up at once.
84 =head1 METHOD MODIFIERS
88 Changes the response C<Content-Type> if appropriate (from the requests C<Accept> header).
92 =head2 pragmatic_accept
94 Some browsers (such as Internet Explorer) have a nasty way of sending
95 Accept */* and this claiming to support XHTML just as well as HTML.
96 Saving to a file on disk or opening with another application does
97 count as accepting, but it really should have a lower q value then
98 text/html. This sub takes a pragmatic approach and corrects this mistake
99 by modifying the Accept header before passing it to content negotiation.
105 Returns an array ref of 3 part arrays, comprising name, priority, output
106 mime-type, which is used for the content negotiation algorithm.
108 =head1 PRIVATE METHODS
110 =head2 _build_variants
112 Returns the default variant attribute contents.
118 =item L<Catalyst::View::TT::XHTML> - Trivial Catalyst TT view using this role.
120 =item L<http://www.w3.org/Protocols/rfc2616/rfc2616-sec12.html> - Content negotiation RFC.
126 Will only work with Views which implement a process method.
128 Should be split into a base ContentNegotiation role which is consumed by ContentNegotiation::XHTML.
132 Tomas Doran (t0m) C<< <bobtfish@bobtfish.net> >>
138 =item David Dorward - test patches and */* pragmatism.
140 =item Florian Ragwitz (rafl) C<< <rafl@debian.org> >> - Conversion into a Moose Role
146 This module itself is copyright (c) 2008 Tomas Doran and is licensed under the same terms as Perl itself.