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Cloudflare API v4 Dynamic DNS Update in Bash
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| #!/bin/bash | |
| # CHANGE THESE | |
| auth_email="[email protected]" | |
| auth_key="f33223caaddee44dede34bdbcdf12edff3eedaac1e3" # found in cloudflare account settings | |
| zone_name=$2 | |
| record_name=$1 | |
| # MAYBE CHANGE THESE | |
| ip=$(curl -s http://ipv4.icanhazip.com) | |
| ip_file="my.ip" | |
| id_zone="zone_$2.id" | |
| id_record="record_$1.id" | |
| log_file="cfddns.log" | |
| # LOGGER | |
| log() { | |
| if [ "$1" ]; then | |
| echo -e "[$(date)] - $1" >> $log_file | |
| fi | |
| } | |
| # SCRIPT START | |
| log "Check Initiated" | |
| log "Public address: $ip" | |
| log "Updating $record_name for $zone_name" | |
| if [ -f $ip_file ]; then | |
| old_ip=$(cat $ip_file) | |
| if [ $ip == $old_ip ]; then | |
| echo "IP has not changed." | |
| exit 0 | |
| fi | |
| fi | |
| if [ -f $id_zone ] && [ $(wc -l $id_zone | cut -d " " -f 1) == 1 ]; then | |
| zone_identifier=$(head -1 $id_zone) | |
| log "Zone id (from cache): $zone_identifier" | |
| else | |
| zone_identifier=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=$zone_name" -H "X-Auth-Email: $auth_email" -H "X-Auth-Key: $auth_key" -H "Content-Type: application/json" | grep -Po '(?<="id":")[^"]*' | head -1) | |
| log "Zone id: $zone_identifier" | |
| echo "$zone_identifier" > $id_zone | |
| fi | |
| if [ -f $id_record ] && [ $(wc -l $id_record | cut -d " " -f 1) == 1 ]; then | |
| record_identifier=$(head -1 $id_record) | |
| log "Record id (from cache): $record_identifier" | |
| else | |
| record_identifier=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?name=$record_name" -H "X-Auth-Email: $auth_email" -H "X-Auth-Key: $auth_key" -H "Content-Type: application/json" | grep -Po '(?<="id":")[^"]*' | head -1) | |
| log "Record id: $record_identifier" | |
| echo "$record_identifier" > $id_record | |
| fi | |
| update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" -H "X-Auth-Email: $auth_email" -H "X-Auth-Key: $auth_key" -H "Content-Type: application/json" --data "{\"id\":\"$zone_identifier\",\"type\":\"A\",\"name\":\"$record_name\",\"content\":\"$ip\"}") | |
| if [[ $update == *"\"success\":false"* ]]; then | |
| message="API UPDATE FAILED. DUMPING RESULTS:\n$update" | |
| log "$message" | |
| echo -e "$message" | |
| exit 1 | |
| else | |
| log $update | |
| message="IP changed to: $ip" | |
| echo "$ip" > $ip_file | |
| log "$message" | |
| echo "$message" | |
| fi |
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