godaddy_ddns/godaddy_ddns_ipv4.sh

#!/bin/bash

# This script is used to check and update your GoDaddy DNS server to the IP address of your current internet connection.
# Special thanks to mfox for his ps script
# https://github.com/markafox/GoDaddy_Powershell_DDNS
#
# First go to GoDaddy developer site to create a developer account and get your key and secret
#
# https://developer.godaddy.com/getstarted
# Be aware that there are 2 types of key and secret - one for the test server and one for the production server
# Get a key and secret for the production server
#
#Update the first 4 variables with your information

domain="" # your domain
name=""   # name of A record to update
key=""    # key for godaddy developer API
secret="" # secret for godaddy developer API

headers="Authorization: sso-key $key:$secret"

# echo $headers # debug

result=$(curl -s -X GET -H "$headers" \
  "https://api.godaddy.com/v1/domains/$domain/records/A/$name")

dnsIp=$(echo $result | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b")
echo "dnsIp:" $dnsIp

# Get public ip address there are several websites that can do this.
currentIp=$(curl -s GET "https://ipv4.wtfismyip.com/text")
echo "currentIp:" $currentIp

if [ $dnsIp != $currentIp ]; then
  echo "Ips are not equal"
  request='[{"data":"'$currentIp'","name":"'$name'","ttl":600,"type":"A"}]'
  # echo $request # debug
  nresult=$(curl -i -s -X PUT \
    -H "$headers" \
    -H "Content-Type: application/json" \
    -d $request "https://api.godaddy.com/v1/domains/$domain/records/A/$name")
  echo $nresult
  echo "dns record updated"
fi