Weiterleitungskette einer URL ausgeben (verbesserte Version)

#!/bin/sh
########################################################################
#
# location-cascade
# $Id: location-cascade,v 1.2 2017/01/25 12:52:39 elias Exp $
#
# Give a list of HTTP redirections for a given URI.
# Requires lynx.
#
########################################################################

# User-agent
# internet exploiter 10 for best results from spammy sites ;)
UA='Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)'

httpcode=0
uri=$1
lasturi="$uri"
while test "$httpcode" -lt 400 -o ! -z "$uri"
do
    set `lynx -useragent="$UA" -mime_header "$uri" 2>&1 |
        sed -e '/^\s*$/q' |
        awk '/^HTTP/ { code = $2 }
                 /^Location/ { uri = $2; gsub("\\r", "", uri) }
                 END { print code, uri }'`
    lasturi="$uri"
    httpcode="$1"
    uri="$2"
    echo "$httpcode\t$lasturi"
    test "$httpcode" -eq 200 && break
    if test "$httpcode" -eq 302
    then
    echo "Found\t$uri"
    break
    fi
done