这最终成功了，并且有很多麻烦：

This ended up working, with a bunch of finagling:

https://github.com/codica2/rails-puma-ssl

我现在正在使用类似的方法在本地主机上启动Rails：
rails s -b'ssl：// localhost：3000？key = server.key& cert = server .crt'

I am now using something like this to launch rails on localhost: rails s -b 'ssl://localhost:3000?key=server.key&cert=server.crt'

在 / etc / hosts 中，我不得不更改 127.0.0.1 localhost 到 127.0.0.1 localhost.ssl

In /etc/hosts, I had to change 127.0.0.1 localhost to 127.0.0.1 localhost.ssl

要查看本地主机，我必须添加 s，例如，Active Admin在此处： https：// localhost：3000 / admin

To see localhost, I have to add the "s" so, for example, Active Admin is here: https://localhost:3000/admin