adding

diff --git a/contrib/url-normalizer.pl b/contrib/url-normalizer.pl
new file mode 100755 (executable)
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--- /dev/null
+++ b/contrib/url-normalizer.pl
@@ -0,0 +1,51 @@
+#!/usr/local/bin/perl -w
+
+# From:    Markus Gyger <mgyger@itr.ch>
+#
+# I'd like to see a redirector which "normalizes" URLs to have
+# a higher chance to get a hit. I didn't see such a redirector,
+# so I thought I would send my little attempt. However, I have
+# no real idea how much CPU time it needs using the LWP modules,
+# but it seems to work.
+
+require 5.003;
+use strict;
+use URI::URL;
+
+$| = 1;  # force a flush after every print on STDOUT
+
+my ($url, $addr, $fqdn, $ident, $method);
+
+while (<>) {
+    ($url, $addr, $fqdn, $ident, $method) = m:(\S*) (\S*)/(\S*) (\S*) (\S*):;
+
+    # "normalize" URL
+    $url = url $url;                    # also removes default port number
+    $url->host(lc $url->host);          # map host name to lower case
+    my $epath = $url->epath;
+    $epath =~ s/%7e/~/ig;               # unescape ~
+    $epath =~ s/(%[\da-f]{2})/\U$1/ig;  # capitalize escape digits
+    if ($url->scheme =~ /^(http|ftp)$/) {
+       $epath =~ s:/\./:/:g;           # safe?
+       $epath =~ s://:/:g;             # safe?
+    }
+    $url->epath($epath);
+
+
+    # ...
+
+
+} continue {
+    print "$url $addr/$fqdn $ident $method\n"
+}
+
+
+BEGIN {
+    unless (URI::URL::implementor('cache_object')) {
+       package cache_object;
+       @cache_object::ISA = (URI::URL::implementor());
+       URI::URL::implementor('cache_object', 'cache_object');
+
+       sub default_port { 3128 }
+    }
+}