82 lines
3.9 KiB
Bash
82 lines
3.9 KiB
Bash
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#!/usr/bin/env bash
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declare wan_ip_record wan_ip cf_records host_record cf_host_ip cf_rec_id
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declare -r HOST=<your-subdomain>
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declare -r DOMAIN=<your-domain-name>
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declare -r TOKEN=<your-api-token>
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declare -r ZONE_ID=<this-zones-id>
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#╔─────────────────────────────────────────────────────────────────────────────╗
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#│ Gετ WΛN IP |
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#╚─────────────────────────────────────────────────────────────────────────────╝
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if ! wan_ip_record="$(host -W2 myip.opendns.com resolver1.opendns.com)"; then
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echo "Hosts timed out" >&2
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exit 1
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fi
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wan_ip="$(echo "$wan_ip_record" | tail -n1 | awk '{ split($0, a, " "); print a[4] }')"
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#╔─────────────────────────────────────────────────────────────────────────────╗
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#│ Gετ Λ rεcδrd δη Clδμdflαrε |
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#╚─────────────────────────────────────────────────────────────────────────────╝
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if ! cf_records="$(curl -s --request GET \
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--url https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records \
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--header 'Content-Type: application/json' \
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--header "Authorization: Bearer $TOKEN")"
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then
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echo "Failed to retrive cloudflare zone records" >&2
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exit 1
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fi
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for i in {0..4000}; do # Assuming 4000 is enough
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record="$(echo "$cf_records" | jq --raw-output ".result[${i}].name")"
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if [[ "$record" == "${HOST}.${DOMAIN}" ]]; then
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host_record="$(echo "$cf_records" | jq -r ".result[${i}]")"
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break
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elif [[ "$record" == null ]]; then
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echo "No record found for ${HOST}.${DOMAIN}" >&2
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exit 1
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fi
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done
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#╔─────────────────────────────────────────────────────────────────────────────╗
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#│ Sετ Λ rεcδrd τδ cμrrεητ WΛN |
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#╚─────────────────────────────────────────────────────────────────────────────╝
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cf_host_ip="$(echo "$host_record" | jq -r '.content')"
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cf_rec_id="$(echo "$host_record" | jq -r '.id')"
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if [[ -z "$cf_host_ip" || "$cf_host_ip" == null ]]; then
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echo "Failed to find content of A record for ${HOST}.${DOMAIN}" >&2
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exit 1
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elif [[ -z "$cf_rec_id" || "$cf_rec_id" == null ]]; then
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echo "Failed to find A record ID for ${HOST}.${DOMAIN}" >&2
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exit 1
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fi
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if [[ "$cf_host_ip" == "$wan_ip" ]]; then
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echo "Cloudflare is up to date @ $(date)" >&2
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else
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echo "Updating Cloudflare's A record from $cf_host_ip to $wan_ip" >&2
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patch_response="$(curl -s --request PATCH \
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--url "https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records/${cf_rec_id}" \
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--header 'Content-Type: application/json' \
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--header "Authorization: Bearer $TOKEN" \
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--data '{
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"comment": "'"${HOST} @ $(date)"'",
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"content": "'"$wan_ip"'",
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"name": "'"${HOST}.${DOMAIN}"'",
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"proxied": false,
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"ttl": 1
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}')"
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if [[ "$(echo "$patch_response" | jq -r '.success')" == true ]]; then
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echo "Update to $wan_ip succeeded @ $(date)" >&2
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else
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echo "Failed to update A record. DUMP:"
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echo "$patch_response"
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exit 1
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fi
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fi
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