64 lines
2.1 KiB
Perl
64 lines
2.1 KiB
Perl
# Selima Website Content Management System
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# XHTML.pm: The subroutine to return application/xhtml+xml on supported browsers and text/html othersise.
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# Copyright (c) 2004-2018 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Author: imacat <imacat@mail.imacat.idv.tw>
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# First written: 2004-12-26
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package Selima::XHTML;
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use 5.008;
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use strict;
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use warnings;
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use base qw(Exporter);
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use vars qw(@EXPORT @EXPORT_OK);
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BEGIN {
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@EXPORT = qw(xhtml_content_type);
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@EXPORT_OK = @EXPORT;
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# Prototype declaration
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sub xhtml_content_type();
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}
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use Selima::DataVars qw($IS_MODPERL :env);
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# xhtml_content_type: Check whether application/xhtml+xml or text/html
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# should be sent to the client
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sub xhtml_content_type() {
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local ($_, %_);
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my ($r, $acpt, $ua);
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# Obtain the required parameters
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if ($IS_MODPERL) {
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$r = $IS_MP2? Apache2::RequestUtil->request:
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Apache->request;
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$acpt = $r->headers_in->get("Accept");
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$ua = $r->headers_in->get("User-Agent");
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} else {
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$acpt = exists $ENV{"HTTP_ACCEPT"}? $ENV{"HTTP_ACCEPT"}: undef;
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$ua = exists $ENV{"HTTP_USER_AGENT"}? $ENV{"HTTP_USER_AGENT"}: undef;
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}
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# Browsers that claim to support application/xhtml+xml explicitly
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return "application/xhtml+xml"
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if defined $acpt && $acpt =~ /\bapplication\/xhtml\+xml\b/;
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# Browsers that are known to support application/xhtml+xml
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return "application/xhtml+xml"
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if defined $ua && $ua =~ /^W3C_Validator\//;
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# Else, we assume that application/xhtml+xml is not supported
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return "text/html";
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}
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return 1;
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