107 lines
3.2 KiB
Bash
Executable File
107 lines
3.2 KiB
Bash
Executable File
#! /usr/bin/env bash
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# This script updates a DNS record using the Cloudflare API.
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set -euo pipefail
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function get_my_ip() {
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curl -s https://api.ipify.org
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}
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function get_zone_id() {
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local zone_name="$1"
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local api_token="${CLOUDFLARE_API_TOKEN}"
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response=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=${zone_name}" \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer ${api_token}")
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if echo "$response" | grep -q '"success":true'; then
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echo "$response" | jq -r '.result[0].id'
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else
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echo "Failed to retrieve zone ID for ${zone_name}. Response: $response"
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exit 1
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fi
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}
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function get_dns_record_id() {
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local zone_id="$1"
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local api_token="${CLOUDFLARE_API_TOKEN}"
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response=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records" \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer ${api_token}")
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if echo "${response}" | grep -q '"success":true'; then
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for record in $(echo "${response}" | jq -r '.result[] | select(.type=="A") | .id'); do
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echo "${record}"
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return
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done
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else
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echo "Failed to retrieve DNS record ID for ${record_name}. Response: $response"
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exit 1
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fi
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}
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function update_dns_record() {
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local zone_id="$1"
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local record_id="$2"
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local ip_address="$3"
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local api_token="${CLOUDFLARE_API_TOKEN}"
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local max_attempts=3
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local attempt=1
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local success=false
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while [ $attempt -le $max_attempts ] && [ "$success" = false ]; do
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if response=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${zone_id}/dns_records/${record_id}" \
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-H "Content-Type: application/json" \
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-H "Authorization: Bearer ${api_token}" \
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-d '{
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"type": "A",
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"name": "tahmidcloud.com",
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"content": "'"${ip_address}"'",
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"ttl": 1,
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"proxied": false
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}'); then
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if echo "$response" | grep -q '"success":true'; then
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success=true
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else
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echo "Attempt $attempt failed. Response: $response"
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fi
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fi
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if [ "$success" = false ] ; then
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if [ $attempt -lt $max_attempts ]; then
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echo "Retrying in 5 seconds..."
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sleep 5
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fi
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((attempt++))
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fi
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done
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if [ "$success" = false ]; then
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echo "Failed to update DNS record after ${max_attempts} attempts"
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exit 1
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fi
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echo "DNS record updated successfully to IP address: ${ip_address}"
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}
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function main() {
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if ! CLOUDFLARE_API_TOKEN=$(grep -A2 'machine api.cloudflare.com' "${HOME}/.netrc" \
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| grep 'password' | awk '{print $2}'); then
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echo "Failed to read Cloudflare API token from .netrc file"
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exit 1
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fi
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if [ -z "${CLOUDFLARE_API_TOKEN:-}" ]; then
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echo "CLOUDFLARE_API_TOKEN environment variable is not set."
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exit 1
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fi
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zone_id=$(get_zone_id "tahmidcloud.com")
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record_id=$(get_dns_record_id "${zone_id}")
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ip_address=$(get_my_ip)
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update_dns_record "${zone_id}" "${record_id}" "${ip_address}"
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}
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main |