Ruby script to update Cloudflare IP address

cloudflare_update_ip.rb

#!ruby

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'

  gem 'dotenv', require: 'dotenv/load'

  gem 'cloudflare'
  gem 'faraday'
end

# check required env variables
Dotenv.require_keys(
  "CLOUDFLARE_TOKEN",
  "CLOUDFLARE_ZONE_NAME",
  "CLOUDFLARE_DNS_RECORD_NAME",
)

# Class to provide your network ip
module NetworkIp
  NETWORK_IP_PROVIDER = ENV.fetch('NETWORK_IP_PROVIDER', 'https://api.ipify.org')

  extend self

  # Returns network IP address
  def get
    response = Faraday.get(NETWORK_IP_PROVIDER)
    raise Faraday::Error, response unless response.success?

    response.body
  end
end

# Class to provide a simple cloudflare configurations interface
module Cloudflare
  module Configurations
    CLOUDFLARE_TOKEN = ENV['CLOUDFLARE_TOKEN']
    CLOUDFLARE_ZONE_NAME = ENV['CLOUDFLARE_ZONE_NAME']
    CLOUDFLARE_DNS_RECORD_NAME = ENV['CLOUDFLARE_DNS_RECORD_NAME']

    extend self

    # Returns the configured Cloudflare API token
    def token
      CLOUDFLARE_TOKEN
    end

    # Returns the configured Cloudflare DNS Zone name
    def zone_name
      CLOUDFLARE_ZONE_NAME
    end

    # Returns the configured Cloudflare DNS Record name
    def dns_record_name
      CLOUDFLARE_DNS_RECORD_NAME
    end
  end
end

network_ip = NetworkIp.get

Cloudflare.connect(token: Cloudflare::Configurations.token) do |cloudflare|
  zone = cloudflare.zones.find_by_name(Cloudflare::Configurations.zone_name)
  dns_record = zone.dns_records.find_by_name(Cloudflare::Configurations.dns_record_name)

  dns_record.update_content(network_ip, proxied: true)
end


__END__

# Criar um token API
https://dash.cloudflare.com/profile/api-tokens

# Testando Token
curl -X GET "https://api.cloudflare.com/client/v4/user/tokens/verify" \
  -H "Authorization: Bearer [CLOUDFLARE_TOKEN]" \
  -H "Content-Type:application/json"

# Listando Zonas DNS
curl -X GET "https://api.cloudflare.com/client/v4/zones" \
  -H "Authorization: Bearer [CLOUDFLARE_TOKEN]" \
  -H "Content-Type:application/json"

# Listando Records do DNS
curl -X GET "https://api.cloudflare.com/client/v4/zones/[CLOUDFLARE_ZONE_ID]/dns_records" \
  -H "Authorization: Bearer [CLOUDFLARE_TOKEN]" \
  -H "Content-Type:application/json"

# Obtendo o IP atual
https://api.ipify.org

# Atualizando o IP do Record do DNS
curl -X PUT "https://api.cloudflare.com/client/v4/zones/[CLOUDFLARE_ZONE_ID]/dns_records/[CLOUDFLARE_DNS_RECORD_ID]" \
  -H "Authorization: Bearer [CLOUDFLARE_TOKEN]" \
  -H "Content-Type: application/json" \
  --data '{"type":"A","name":"foo.example.com","content":"127.0.0.1","ttl":1,"proxied":true}'