string(320) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%99%BD%E7%9B%92%E6%B5%8B%E8%AF%95%E5%92%8C%E9%BB%91%E7%9B%92%E6%B5%8B%E8%AF%95%E7%9A%84%E5%8C%BA%E5%88%AB%E4%BD%93%E7%8E%B0%E5%9C%A8%E5%93%AA%E4%BA%9B%E6%96%B9%E9%9D%A2 => Received HTTP code 403 from proxy after CONNECT"
白盒测试和黑盒测试的区别体现在哪些方面
