9cco
e8873cc328
Used shell built-in command -v to determine if dig is installed and if it is, use it as default for getting the ip-address. Also made the use of brackets consistent and updated the the way the data variable is created before it is sent with curl to make it more readable in the code.
119 lines
4.4 KiB
Bash
119 lines
4.4 KiB
Bash
#!/bin/bash
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## change to "bin/sh" when necessary
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auth_email="" # The email used to login 'https://dash.cloudflare.com'
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auth_method="token" # Set to "global" for Global API Key or "token" for Scoped API Token
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auth_key="" # Your API Token or Global API Key
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zone_identifier="" # Can be found in the "Overview" tab of your domain
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record_name="" # Which record you want to be synced
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ttl="3600" # Set the DNS TTL (seconds)
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proxy="false" # Set the proxy to true or false
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slacksitename="" # Title of site "Example Site"
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slackchannel="" # Slack Channel #example
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slackuri="" # URI for Slack WebHook "https://hooks.slack.com/services/xxxxx"
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###########################################
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## Check if we have a public IP
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###########################################
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command -v dig &> /dev/null
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# Use the DNS lookup if dig is available.
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if [[ $? -eq 0 ]]; then
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ip=$(dig +short myip.opendns.com @resolver1.opendns.com);
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else
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ip=$(curl -s https://api.ipify.org || curl -s https://ipv4.icanhazip.com/)
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fi
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if [[ "${ip}" == "" ]]; then
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logger -s "DDNS Updater: No public IP found"
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exit 1
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fi
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###########################################
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## Check and set the proper auth header
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###########################################
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if [[ "${auth_method}" == "global" ]]; then
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auth_header="X-Auth-Key:"
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else
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auth_header="Authorization: Bearer"
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fi
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###########################################
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## Seek for the A record
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###########################################
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logger "DDNS Updater: Check Initiated"
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record=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?type=A&name=$record_name" \
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-H "X-Auth-Email: $auth_email" \
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-H "$auth_header $auth_key" \
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-H "Content-Type: application/json")
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###########################################
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## Check if the domain has an A record
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###########################################
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if [[ $record == *"\"count\":0"* ]]; then
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logger -s "DDNS Updater: Record does not exist, perhaps create one first? (${ip} for ${record_name})"
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exit 1
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fi
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###########################################
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## Get existing IP
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###########################################
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old_ip=$(echo "$record" | sed -E 's/.*"content":"(([0-9]{1,3}\.){3}[0-9]{1,3})".*/\1/')
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# Compare if they're the same
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if [[ $ip == $old_ip ]]; then
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logger "DDNS Updater: IP ($ip) for ${record_name} has not changed."
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exit 0
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fi
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###########################################
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## Set the record identifier from result
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###########################################
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record_identifier=$(echo "$record" | sed -E 's/.*"id":"(\w+)".*/\1/')
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###########################################
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## Change the IP@Cloudflare using the API
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###########################################
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api_data=$(cat <<EOF
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{
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"type":"A",
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"name":"$record_name",
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"content":"$ip",
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"ttl":$ttl,
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"proxied":$proxy
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}
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EOF
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)
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update=$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" \
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-H "X-Auth-Email: $auth_email" \
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-H "$auth_header $auth_key" \
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-H "Content-Type: application/json" \
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--data "$api_data") #"{\"type\":\"A\",\"name\":\"$record_name\",\"content\":\"$ip\",\"ttl\":\"$ttl\",\"proxied\":${proxy}}")
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###########################################
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## Report the status
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###########################################
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case "$update" in
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*"\"success\":false"*)
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echo -e "DDNS Updater: $ip $record_name DDNS failed for $record_identifier ($ip). DUMPING RESULTS:\n$update" | logger -s
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if [[ $slackuri != "" ]]; then
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curl -L -X POST $slackuri \
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--data-raw '{
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"channel": "'$slackchannel'",
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"text" : "'"$slacksitename"' DDNS Update Failed: '$record_name': '$record_identifier' ('$ip')."
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}'
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fi
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exit 1;;
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*)
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logger "DDNS Updater: $ip $record_name DDNS updated."
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if [[ $slackuri != "" ]]; then
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curl -L -X POST $slackuri \
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--data-raw '{
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"channel": "'$slackchannel'",
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"text" : "'"$slacksitename"' Updated: '$record_name''"'"'s'""' new IP Address is '$ip'"
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}'
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fi
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exit 0;;
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esac
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