update_mime_types.pl is a simple utility for merging the IANA media types
registry with an existing mime.types file such that the output contains
a potential replacement mime.types with only the new types being added
as comments and the entire file sorted by name.


git-svn-id: https://svn.apache.org/repos/asf/httpd/docs-build/trunk@1752885 13f79535-47bb-0310-9956-ffa450edef68

update_mime_types.pl

diff --git a/update_mime_types.pl b/update_mime_types.pl
new file mode 100755
index 0000000..bfd2043
--- /dev/null
+++ b/update_mime_types.pl
@@ -0,0 +1,120 @@
+#!/usr/bin/perl
+#
+# update_mime_types.pl: Read an existing Apache mime.types file and
+# merge its entries with any new types discovered within an
+# IANA media-types.xml file (see below for obtaining it).
+#
+# All existing mime.types entries are preserved as is (aside from sorting).
+# Any new registered types are merged as a commented-out entry without
+# an assigned extension, and then the entire file is printed to stdout.
+#
+# Typical use would be something like:
+# 
+#  wget -N https://www.iana.org/assignments/media-types/media-types.xml
+#  ./update_mime_types.pl mime.types > new.types
+#  diff -u mime.types new.types               ; check the differences
+#  rm mime.types && mv new.types mime.types   ; only if diffs are good
+#
+# Note that we assume most files are in the current working directory
+# and efficiency is not an issue.  The first argument, if any, is the
+# path to the existing mime.types file (or its directory).
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+
+my $mity = 'mime.types';
+my $medy = 'media-types.xml';
+
+# if an argument is given, look there for mime.types
+# otherwise, look in current working directory for all files
+
+if ($#ARGV >= 0) {
+    if (-d $ARGV[0]) {
+        $mity = $ARGV[0] . '/' . $mity;
+    }
+    else {
+        $mity = $ARGV[0];
+    }
+} 
+
+die "no $mity here\n" unless (-e $mity);
+die "no $medy here\n" unless (-e $medy);
+
+my $in_head = 1;
+my @header = ();
+my %mtype = ();
+
+# Read through the Apache httpd mime.types file to create tables
+# keyed on the minor type names.  We save the entire input line as
+# the hash value so that existing configs won't change when output.
+# We assume the type names are already lowercased tokens.
+#
+die "cannot open $mity: $!" unless open (MIME, "<", $mity);
+
+while (<MIME>) {
+    if ($in_head) {
+        push @header, $_;
+        if (/^# =========/) {
+            $in_head = 0;
+        }
+        next;
+    }
+    if (/^(# )?([a-z_\+\-\.]+\/\S+)/) {
+        $mtype{$2} = $_;
+    }
+    else {
+        warn "Skipping: ", $_;
+    }
+}
+close MIME;
+
+# Read through the IANA media types registry, in XML form, and extract
+# whatever looks to be a registered type based on the element structure.
+# Yes, this is horribly fragile, but the format isn't expected to change.
+#
+die "cannot open $medy: $!" unless open (IANA, "<", $medy);
+
+my $major    = 'examples';
+my $thistype = '';
+
+while (<IANA>) {
+    last if (/^\s*<people>/);
+    next if (/(OBSOLETE|DEPRECATE)/);
+
+    if (/^\s*<registry id="([a-z_\+\-\.]+)"/) {
+        $major = $1;
+        next;
+    }
+    next if ($major eq 'examples');
+
+    if (/^\s*<name>([^<]+)<\/name>/) {
+        $thistype = lc "$major/$1";
+        if (!defined($mtype{$thistype})) {
+            $mtype{$thistype} = "# $thistype\n";
+        }
+    }
+}
+close IANA;
+
+# Finally, output a replacement for Apache httpd's mime.types file
+#
+print @header;
+
+foreach $key (sort(keys %mtype)) {
+    print $mtype{$key};
+}
+
+exit 0;
\ No newline at end of file