小知识，大挑战！本文正在参与“程序员必备小知识”创作活动。
目录
- 问题
- 解决
问题
今天调用上传接口上传文件时，遇到了一个 x509 类型报错，具体报错信息如下：
2021-10-15 17:46:13.145 ERROR oss/upload.go:210 upload process Failed {"error": "Post "https://192.168.215.139:9443/store/file/upload\": x509: cannot validate certificate for 192.168.215.139 because it doesn't contain any IP SANs"}
panic: send on closed channel
解决
网上也找了很多其他方法，看似很正确，实际上没有解决自己遇到的问题，于是自己找到了一种解决方法。
首先分析问题的大致原因是认证机制出了问题。
自己回想起之前也遇到一个 x509 的报错，但是具体的错误提示不一样，于是自己怀疑他们是不是属于一类错误呢？反正也没有什么好方法，那就死马当成活马医吧！
具体命令如下，步骤一：
sudo apt-get update
输出结果：
root@al-bj-backstage-01:~# sudo apt-get update
Hit:1 http://mirrors.cloud.aliyuncs.com/ubuntu bionic InRelease
Get:2 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:3 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-backports InRelease [74.6 kB]
Get:4 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-security InRelease [88.7 kB]
Get:5 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-updates/main Sources [517 kB]
Get:6 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-updates/main i386 Packages [1360 kB]
Get:7 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-updates/main amd64 Packages [2251 kB]
Get:8 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-security/main Sources [258 kB]
Get:9 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-security/main amd64 Packages [1906 kB]
Get:10 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-security/main i386 Packages [1055 kB]
Fetched 7600 kB in 2s (4971 kB/s)
Reading package lists... Done
复制代码步骤二：
sudo apt-get install ca-certificates -y
输出结果：
root@al-bj-backstage-01:~# sudo apt-get install ca-certificates -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
ca-certificates
1 upgraded, 0 newly installed, 0 to remove and 59 not upgraded.
Need to get 145 kB of archives.
After this operation, 2,048 B disk space will be freed.
Get:1 http://mirrors.cloud.aliyuncs.com/ubuntu bionic-updates/main amd64 ca-certificates all 20210119~18.04.2 [145 kB]
Fetched 145 kB in 0s (1,866 kB/s)
Preconfiguring packages ...
(Reading database ... 117632 files and directories currently installed.)
Preparing to unpack .../ca-certificates_20210119~18.04.2_all.deb ...
Unpacking ca-certificates (20210119~18.04.2) over (20210119~18.04.1) ...
Setting up ca-certificates (20210119~18.04.2) ...
Updating certificates in /etc/ssl/certs...
0 added, 1 removed; done.
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for ca-certificates (20210119~18.04.2) ...
Updating certificates in /etc/ssl/certs...
0 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...
done.
复制代码重启上传服务，再次调用上传接口，报错消失，问题解决了，赞！