godaddy_ddns.sh

#!/bin/bash

# This script is used to check and update your GoDaddy DNS server to the IP address of your current internet connection.
# This differs from the one mcarpenterjr created because you can update multiple A Records.
# Special thanks to mcarpenterjr for his derivative of mfox's ddns powershell script
# https://gist.github.com/mcarpenterjr/1dedf9f9f842710ba5f07937ef4f5ae4
# 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
key=""      # key for godaddy developer API
secret=""   # secret for godaddy developer API
headers="Authorization: sso-key $key:$secret"

# Declare which A records to update here:
declare -a ARecordArray=("@" "@" "@" "@")

# Iterate the string array using for loop
for name in ${ARecordArray[@]}; do
        result=$(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.
        ret=$(curl -s GET "http://ipinfo.io/json")
        currentIp=$(echo $ret | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b")
        # echo "currentIp:" $currentIp

         if [ "dnsIp" != $currentIp ];
         then
         #      echo "Ips are not equal"
                request='[{"data":"'$currentIp'","ttl":3600}]'
         #      echo $request
                nresult=$(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
        fi
done