rails 如何使用https get post json 运用的办法

require 'net/https'
require 'uri'
require 'json'
  #获取access_token
  def get_access_token(openid,secret)
      url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+openid+'&secret='+secret
      uri = URI(url)
      response = Net::HTTP.get(uri)
      return JSON.parse(response)
  end