See RubyGems mirror

我们已经停止基于 HTTP 协议的镜像服务, 请在配置中使用 HTTPS* 协议代替

Q: gem install xxx 的时候遇到错误信息包含：“Error fetching data: Errno::ETIMEDOUT: Operation timed out - connect(2)”

A: 网络问题导致请求淘宝服务器被连接重置了，在遇到此类情况的时候，你可以尝试换一台机器或网络尝试安装，看是否还有同样的问题，以确定是淘宝镜像服务器的问题还是你的环境问题，如果你换了环境仍然有问题，请上 Ruby China 发帖求助。

http://ruby.taobao.org/ => https://ruby.taobao.org/

Need to change http to https

The same thing doesn’t work, there is a problem

I have been encountering problems and can’t get over it~

I also encountered the problem above, and finally found the answer. Taobao’s gem source is no longer maintained. See the following link for the solution:
http://www.oschina.net/news/71749/taobao-gems-ruby-china

When using multiple gem sources, you can consider using gsm-sources-manager for management switching.

Regarding the problem of switching gem sources, I tried it after seeing the above reply and found it useful, but it didn’t go into too much detail. Here I will tell you my solution. I hope it can help people who see this post.