Cloudflare DDNS with upnp

#!/bin/sh

content=$( upnpc -s | sed -n -e 's/ExternalIPAddress = \(.*\)/\1/p' )
DNS_IP=$( dig __host__ @brenda.ns.cloudflare.com +short)
WORKS=$?

if [ "$content" = "" ]
    then
    echo "No IP address to set record value with."
    exit 1
fi

if [ "$content" = "$DNS_IP" ]
then
#   echo "No need to update IP"
   exit 0
fi


key=__fill_me__
email=__fill_me__
zone=__fill_me__
zone_id=__fill_me__
rec_id=__fill_me__
type=A
name=__host__
ttl=120
proxied=false

update_response=$(curl -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records/$rec_id" -H "X-Auth-Email
: $email" -H "X-Auth-Key: $key" -H "Content-Type: application/json" --data "{\"id\":\"$rec_id\",\"type\":\"$type\",\"nam
e\":\"$name\",\"content\":\"$content\",\"ttl\":$ttl,\"proxied\":$proxied}" -s)                                         m
success_val=`echo $update_response | sed -E "s/.+\"success\":(true|false).+/\1/g"`
if [ "$success_val" = "true" ]
then
    echo "Record Updated."
else
    echo "Record update failed."
    echo $update_response
    exit 1
fi