def push(params={})
      uri = 'api/send'
      params.merge!({
        appkey: @appkey,
        timestamp: Time.now.to_i
      })
      request(uri, params)
    end
def push(params={})
      uri = 'api/send'
      params.merge!({
        appkey: @appkey,
        timestamp: Time.now.to_i
      })
      request(uri, params)
    end
消息发送
 POST http://msg.umeng.com/api/send?sign=mysign