50 lines
1.5 KiB
Bash
50 lines
1.5 KiB
Bash
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#!/bin/bash
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# Takes two positional arguments:
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# $1 is the name of the zone to update
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# E.g. jafner.net
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# $2 is an auth token for Cloudflare;
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# Must have the following permissions
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# for the given zone:
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# - Zone: Read
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# - DNS: Read
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# - DNS: Edit
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function cfddns () {
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ZONE=$1
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TOKEN=$2
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# 1. Get the zone ID from the zone name
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ZONE_ID=$(
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curl -s \
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-X GET "https://api.cloudflare.com/client/v4/zones" \
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--header "Authorization: Bearer $TOKEN" \
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--header "Content-Type:application/json" |\
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jq -r --arg NAME "$ZONE" '.[] | .[]? | select(.name?==$NAME) | .id' 2>/dev/null |\
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xargs
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); echo $ZONE_ID
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# 2. Get the record ID of the root A record
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RECORD_ID=$(
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curl -s \
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-X GET "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records" \
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--header "Authorization: Bearer $TOKEN" \
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--header 'Content-Type:application/json' |\
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jq -r --arg NAME "$ZONE" '.[] | .[]? | select(.type=="A") | select(.name?==$NAME) | .id' 2>/dev/null |\
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xargs
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); echo $RECORD_ID
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# 3. Compose the json payload for the record to push
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DATA=$(jq --null-input \
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--arg CONTENT "$(curl -s ipinfo.io/ip)" \
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--arg NAME "$ZONE" \
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'{"content": $CONTENT, "name": $NAME, "type": "A"}'
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); echo $DATA
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# 4. Finally submit the updated record to Cloudflare
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curl --request PUT \
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--url https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records/$RECORD_ID \
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--header "Authorization: Bearer $TOKEN" \
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--header 'Content-Type:application/json' \
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--data "$DATA" > /dev/null 2>&1
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}
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cfddns $1 $2
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