string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%81%E5%85%AD%E8%BF%9B%E5%88%B6%E8%BD%AC%E6%8D%A2%E8%AE%A1%E7%AE%97%E5%99%A8%E5%9C%A8%E7%BA%BF => Received HTTP code 403 from proxy after CONNECT"
十六进制转换计算器在线
