cloudflare-update-record.sh

#!/bin/bash

# CHANGE THESE
API=1aeb5xxxxxxxxxx9dd194c56d07caf311
EMAIL="example@gmail.com"
DOMAIN="example.net"
LOG_DEV="/var/log/ddns.json"

get_zone_id () {
  local zone_id=`curl -fs -X GET "https://api.cloudflare.com/client/v4/zones" \
                      -H "X-Auth-Email: ${EMAIL}" \
                      -H "X-Auth-Key: ${API}" \
                      -H "Content-Type: application/json" | jq -r ".result[] | select(.name==\"${DOMAIN}\") | .id"`
  echo $zone_id
}

ZONE_ID=$(get_zone_id)

get_record_id () {
  local record=$1
  local record_id=`curl -s X GET "https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records?type=A&name=${record}" \
                        -H "Content-Type:application/json" \
                        -H "X-Auth-Key:${API}"  \
                        -H "X-Auth-Email:${EMAIL}" | jq -r ".result[0].id"`
  echo $record_id
}

get_ip () {
  echo `curl -fs http://ipv4.icanhazip.com`
}

set_ip () {
  local ip=$1
  local record=$2
  local proxied=$3
  local record_id=`get_record_id $record`
  local log=`curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records/${record_id}" \
    -H "X-Auth-Email: $EMAIL" \
    -H "X-Auth-Key: $API" \
    -H "Content-Type: application/json" \
    --data "{\"type\":\"A\",\"name\":\"${record}\",\"content\":\"$ip\",\"ttl\":1,\"proxied\":${proxied}}"`
  echo ${log} | jq "."  >> ${LOG_DEV}
  local status=`echo ${log} | jq -r ".success"`
  if [[ $status == "true" ]]; then
    echo "0"
  else
    echo "1"
  fi
}

domains=("a.example.net" "b.example.net" "c.example.net")
proxy=("true" "false" "false")
n=`echo ${#domains[@]}-1 | bc -l`
IP=$(get_ip)
cat /dev/null > ${LOG_DEV}
for i in `seq 0 $n`; do
  d=${domains[$i]}
  p=${proxy[$i]}
  echo "Set $d => $IP Proxy $p"
  STATUS=$(set_ip "$IP" "$d" "$p")
  echo "Status ${STATUS}"
done