Script for updating IP and IPv6 addresses with dnsimple.com.

dnsimple-update-ip

#!/bin/bash

# Pass RECORD_ID_IP or RECORD_ID_IP6 on the command line
# EMAIL and TOKEN can come from ~/.auth/dnsimple.sh or the command line

set -e
#set -x

[ -r ~/.auth/dnsimple.sh ] && . ~/.auth/dnsimple.sh

DOMAIN="my-domain.local"
API_HOST="https://api.dnsimple.com"
CURL_RETURN_CODE_EMPTY_RESPONSE=52
OUTPUT="$(mktemp -t dnsimple-update-ip.XXXXXXXX)"
trap cleanup EXIT

function cleanup () {
    [ -n "$DEBUG" ] && cat "$OUTPUT"
    rm -f "$OUTPUT"
}

function update-record-content () {
    RECORD_TYPE="$1"
    RECORD_ID="$2"

    if [ "$RECORD_TYPE" = "ip" ]; then
        CURL_IP_FLAGS="-4"
    elif [ "$RECORD_TYPE" = "ip6" ]; then
        CURL_IP_FLAGS="-6"
    fi

    if [ -n "$DEBUG" ]; then
        CURL_FLAGS="-v"
        if [ "$RECORD_TYPE" = "ip" ]; then
            CONTENT="my ipv4 address"
        elif [ "$RECORD_TYPE" = "ip6" ]; then
            CONTENT="my ipv6 address"
        fi
    else
        CURL_FLAGS="-s"
        CONTENT="$(curl $CURL_IP_FLAGS $CURL_FLAGS ifconfig.co)"
    fi

    if [ -n "$DEBUG" ]; then
        nc -l localhost 8080 &
        API_HOST="http://localhost:8080"
    fi

    # EMAIL and TOKEN are read from ~/.auth/dnsimple.sh or the environment
    curl $CURL_FLAGS \
         -X PUT \
         -H "X-DNSimple-Token: ${EMAIL}:${TOKEN}" \
         -H 'Accept: application/json' \
         -H 'Content-Type: application/json' \
         -d "{\"record\":{\"name\":\"pain\",\"content\":\"${CONTENT}\"}}" \
         ${API_HOST}/v1/domains/${DOMAIN}/records/${RECORD_ID} \
        || [ -n "$DEBUG" -a $? -eq $CURL_RETURN_CODE_EMPTY_RESPONSE ]
} >> $OUTPUT


[ -z "$RECORD_ID_IP" ] || update-record-content ip "$RECORD_ID_IP"
[ -z "$RECORD_ID_IP6" ] || update-record-content ip6 "$RECORD_ID_IP6"