Initial commit.

lib/perl5/Selima/Server.pm

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+# Selima Website Content Management System
+# Server.pm: The server software identifiers.
+
+#  Copyright (c) 2004-2018 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+# Author: imacat <imacat@mail.imacat.idv.tw>
+# First written: 2004-09-12
+
+package Selima::Server;
+use 5.008;
+use strict;
+use warnings;
+use base qw(Exporter);
+use vars qw(@EXPORT @EXPORT_OK);
+BEGIN {
+@EXPORT = qw(is_apache is_iis);
+@EXPORT_OK = @EXPORT;
+# Prototype declaration
+sub is_apache();
+sub is_iis();
+}
+
+use Selima::DataVars qw(:env);
+
+# The result never changes in any circumstances
+use vars qw($IS_APACHE $IS_IIS);
+undef $IS_APACHE;
+undef $IS_IIS;
+
+# is_apache: If this server is Apache
+sub is_apache() {
+    # Checked before
+    return $IS_APACHE if defined $IS_APACHE;
+    # mod_perl always run on Apache
+    return ($IS_APACHE = 1) if $IS_MODPERL;
+    # Check from SERVER_SOFTWARE
+    return ($IS_APACHE = ($ENV{"SERVER_SOFTWARE"} =~ /^Apache\b/? 1: 0));
+}
+
+# is_iis: If this server is Microsoft-IIS
+sub is_iis() {
+    # Checked before
+    return $IS_IIS if defined $IS_IIS;
+    # mod_perl never run on Microsoft-IIS
+    return ($IS_IIS = 0) if $IS_MODPERL;
+    # Check from SERVER_SOFTWARE
+    return ($IS_IIS = ($ENV{"SERVER_SOFTWARE"} =~ /^Microsoft-(?:IIS|PWS)\b/? 1: 0));
+}
+
+return 1;