The lambda function of daily_prime_check

lambda_function.rb

require 'json'
require 'prime'
require 'net/http'
require 'uri'

SLACK_URL = 'https://hooks.slack.com/services/....'

def post_to_slack(url, message)
    uri = URI.parse(url)
    response = Net::HTTP.start(uri.host, uri.port, use_ssl: uri.scheme == 'https') do |http|
        http.post(uri.path, JSON.generate(message), {'Content-Type' => 'application/json'})
    end
    response.value
end

def lambda_handler(event:, context:)
    today = Time.now.strftime("%Y%m%d")
    body = ""
    while today != ""
        body << "#{today} => #{today.to_i.prime? ? '素数' : '合成数'}\n"
        today = today[1..-1]
    end
    post_to_slack(SLACK_URL, {"text" => body})
end