cloudflareZoneRecord.sh

#!/usr/bin/env bash
###################################################################
#Script Name    : cloudflareZoneRecord.sh
#Description    : A quick and dirty shell script to view and 
#               : manipulate cloudflare zone records
#Args           : ADDRECORD,DELRECORD,GETRECORD,SETRECORD
#               : GETZONE,DYNDNSUPDATE
#Author         : Paul Komurka
#Email          : pawlex@gmail.com
###################################################################

## QUIT IF NO ARGS PASSED
if [ $# -lt 1 ]
then
        echo "Usage : $0 <COMMAND> <RECORD>"
        exit
fi

# Need to make sure the system has CURL installed.
if hash curl 2>/dev/null; then
    CURL=`which curl`
else
    printf "CURL not installed"
    exit -1
fi


# Load configuration from file if it exists.
# You may also define your credendials inline (below)
BASE="$(dirname "$0")"

if [ -e $BASE/config.cf ]; then
    source $BASE/config.cf
fi


function formatJson() {
    # Reformat output if json_reformat exists
    if hash json_reformat 2>/dev/null; then
        echo "$(echo $1 | json_reformat)"
    else
        echo "$1"
    fi
}


# GET RECORD
function getRecord() {
    RECORDTYPE=$1
    RECORDNAME=$2
    RETVAL=$($CURL -s -X GET "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records?type=$RECORDTYPE&name=$RECORDNAME" \
        -H "X-Auth-Email: $EMAIL" \
        -H "X-Auth-Key: $GLOBAL_API_KEY" \
        -H "Content-Type: application/json")
    RETVAL=$(formatJson $RETVAL)
    printf "$RETVAL\n"
}

# UPDATE RECORD
function setRecord() {
    RECORDID=$1
    RECORDTYPE=$2
    RECORDNAME=$3
    RECORDVALUE=$4
    #
    RETVAL=$($CURL -s -X PUT "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records/$RECORDID" \
         -H "X-Auth-Email: $EMAIL" \
         -H "X-Auth-Key: $GLOBAL_API_KEY" \
         -H "Content-Type: application/json" \
         --data "{\"type\":\"$RECORDTYPE\",\"name\":\"$RECORDNAME\",\"content\":\"$RECORDVALUE\"}")# &> /dev/null
    #
    if [[ "$RETVAL" == *'"success":true'* ]]; then
        echo "SUCCESS"
        exit 0
    else
        echo "FAILED"
        printf "$RETVAL\n"
        exit -1
    fi
}

# GET ALL ZONE RECORDS
function getZone() {
    RETVAL=$($CURL -s -X GET "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records" \
        -H "X-Auth-Email: $EMAIL" \
        -H "X-Auth-Key: $GLOBAL_API_KEY" \
        -H "Content-Type: application/json" )
    RETVAL=$(formatJson $RETVAL)
    printf "$RETVAL\n"
}

# CREATE ZONE RECORD
function addRecord() {
    #POST https://api.cloudflare.com/client/v4/zones/d2b4e568601e72a510503a5015eb4c18/dns_records
    RECORDTYPE=$1
    RECORDNAME=$2
    RECORDVALUE=$3
    #
    RETVAL=$($CURL -s -X POST \
        "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records" \
        -H "X-Auth-Email: $EMAIL" \
        -H "X-Auth-Key: $GLOBAL_API_KEY" \
        -H "Content-Type: application/json" \
        --data "{\"type\":\"$RECORDTYPE\",\"name\":\"$RECORDNAME\",\"content\":\"$RECORDVALUE\",\"ttl\":120,\"priority\":10,\"proxied\":false}")
    #
    if [[ "$RETVAL" == *'"success":true'* ]]; then
        echo "SUCCESS"
        exit 0
    else
        echo "FAILED"
        printf "$RETVAL\n"
        exit -1
    fi
}

function deleteRecord() {
    RECORDID=$1
    #
    RETVAL=$($CURL -s -X DELETE "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records/$RECORDID" \
         -H "X-Auth-Email: $EMAIL" \
         -H "X-Auth-Key: $GLOBAL_API_KEY" \
         -H "Content-Type: application/json")
    #
    if [[ "$RETVAL" == *'"success":true'* ]]; then
        echo "SUCCESS"
        exit 0
    else
        echo "FAILED"
        printf "$RETVAL\n"
        exit -1
    fi
}

##  PROGRAM ARGS
case "$1" in

    GETZONE)
            getZone
    ;;

    GETRECORD) if [ $# -lt 2 ]
            then
                echo "Usage : $0 $1 <RECORD TYPE: EG AAAA> <RECORDNAME: EG www.domain.com>"
                exit
            fi
            getRecord $2 $3
    ;;

    SETRECORD) if [ $# -lt 4 ]
           then
                echo
                echo "  Usage  : $1 <id*> <type> <name> <value>"
                echo "  Example: $1 94a30abbca443e03fd11aa00ca74627e AAAA test.mydomain.org 127.0.0.1"
                echo "      * record id can found by running GETZONE"
                echo
                exit -1
            fi

            setRecord $2 $3 $4 $5
    ;;

    ADDRECORD) if [ $# -lt 3 ]
           then
                echo
                echo "  Usage  : $1 <type> <name> <value>"
                echo "  Example: $1 AAAA test.mydomain.org 127.0.0.1"
                echo
                exit -1
            fi

        addRecord $2 $3 $4
    ;;

    DELRECORD) if [ $# -lt 1 ]
           then
                echo
                echo "  Usage  : $1 <id*>"
                echo "  Example: $1 94a30abbca443e03fd11aa00ca74627e"
                echo "      * record id can found by running GETZONE"
                echo
                exit -1
            fi

        deleteRecord $2
    ;;

    DYNDNSUPDATE)

        if [ -z "$DYNDNSRECORDID" ] || [ -z "$DYNDNSRECORDNAME" ] || [ -z "$DYNDNSRECORDTYPE" ]; then
            printf "\$DYNDNSRECORDID, \$DYNDNSRECORDNAME, \$DYNDNSRECORDTYPE not defined!\n"
            exit -1
        fi
        
        if hash host 2>/dev/null; then
            HOST=`which host`
        else
            printf "host not installed.  cannot resolve $DYNDNSRECORDNAME"
            exit -1
        fi

        ## GRAB CURRENT LOCAL IP ADDRESS and PREVIOUS IP address from cloudflare
        CURRENT_IP=$($CURL -s checkip.dyndns.org | grep -oE '((1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.){3}(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])')
        PREVIOUS_IP=$($HOST -4 $DYNDNSRECORDNAME ken.ns.cloudflare.com | grep "has address" | cut -d" " -f4)
        
        if [ $CURRENT_IP == $PREVIOUS_IP ]; then
            echo "NO UPDATE NECESSARY"
        else
            echo "UPDATE NECESSARY"
            echo "$PREVIOUS_IP -> $CURRENT_IP"
            setRecord $DYNDNSRECORDID $DYNDNSRECORDTYPE $DYNDNSRECORDNAME $CURRENT_IP
        fi
    ;;

    *) echo echo "Usage : $0 <COMMAND> <RECORD>"
    ;;

esac

exit 0