string(250) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=ie%E6%B5%8F%E8%A7%88%E5%99%A8%E4%BF%AE%E6%94%B9%E4%B8%BB%E9%A1%B5%E4%B8%8D%E8%83%BD%E7%94%9F%E6%95%88 => Received HTTP code 403 from proxy after CONNECT"
ie浏览器修改主页不能生效
