string(239) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%B4%BE%E5%B2%9B%E5%85%B3%E4%BA%8E%E6%8E%A8%E6%95%B2%E7%9A%84%E9%82%A3%E9%A6%96%E8%AF%97 => Received HTTP code 403 from proxy after CONNECT"
贾岛关于推敲的那首诗
