string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=raw%E6%A0%BC%E5%BC%8F%E7%85%A7%E7%89%87%E6%89%93%E5%BC%80%E6%96%B9%E5%BC%8F%E4%B8%8D%E5%AF%B9 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
raw格式照片打开方式不对
