Cloudflare API v4 client class in Ruby (NOT YET FINISHED)

cloudflare_api_client_v4.rb

class CloudflareClient
  CLOUDFLARE_API_ENDPOINT = "https://api.cloudflare.com/client/v4"  
  
  def initialize(email, api_key)
    require "rest-client"
    require "json"

    raise ArgumentError, "Parameters email and api_key are mandatory" if email.to_s.empty? or api_key.to_s.empty?
    @auth_headers = {"X-Auth-Email" => email, "X-Auth-Key" => api_key, "Content-Type" => "application/json"}
  end

  def get_zone_by_name(zone_name)
    send_req "#{CLOUDFLARE_API_ENDPOINT}/zones?name=#{zone_name}"
  end 

  def get_dns_record(zone_id, record_name, record_type = nil)
    url = "#{CLOUDFLARE_API_ENDPOINT}/zones/#{zone_id}/dns_records?name=#{record_name}"
    url += "&type=#{record_type}" if not record_type.to_s.empty?
    send_req url
  end

  def post_dns_record(zone_id, record_name, record_type, record_content, zone_name, proxied = false)
    post_data = {'name' => record_name, 'type' => record_type, 'zone_name' => zone_name, 'content' => record_content, 'proxied' => proxied}
    send_req "#{CLOUDFLARE_API_ENDPOINT}/zones/#{zone_id}/dns_records", "post", post_data.to_json
  end

  def put_dns_record(zone_id, record_id, record_name, record_type, record_content, zone_name, proxied = false)
    put_data = {'id' => record_id, 'name' => record_name, 'type' => record_type, 'zone_name' => zone_name, 'content' => record_content, 'proxied' => proxied}
    send_req "#{CLOUDFLARE_API_ENDPOINT}/zones/#{zone_id}/dns_records/#{record_id}", "put", put_data.to_json
  end

  private

  # wrapper to dispatch http requests and handle errors
  def send_req (url, http_verb = "get", payload = nil)
    begin
      call = "RestClient.#{http_verb} '#{url}'"
      call += ", '#{payload}'" if not payload.to_s.empty?
      call += ", @auth_headers"
      response = eval call 
    rescue => e
      response_body = JSON.parse(e.response.body)
    end
    
    # check for errors
    if not response_body.to_s.empty? and not response_body["success"]
      message = "Cloudflare API Error: #{response_body['errors']} for #{http_verb} request"
      messsage += " - data: #{payload}" if not payload.to_s.empty?
      raise message
    end

    JSON.parse(response)
  end
end