Ruby-on-rails 从 Rails 控制器获取主机名
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Get hostname from Rails controller
提问by RailsSon
I am trying to get the hostname of the machine which a rails application is running on from the controller.
我正在尝试从控制器获取运行 rails 应用程序的机器的主机名。
What would be the best way to do this taking into account it should work on both windows and linux?
考虑到它应该在 windows 和 linux 上都可以使用，最好的方法是什么？
采纳答案by Wayne Conrad
There's always:
总有：
require 'socket'
...
Socket.gethostname
I've got no Windows box handy with which to test this, but the docs make no mention of it being *nix specific.
我没有方便的 Windows 盒子来测试这个，但是文档没有提到它是 *nix 特定的。
Note: The require statement is not necessary for Rails 4, and probably other Rails versions as well. It is required if you are doing plain Ruby without Rails.
注意： require 语句对于 Rails 4 不是必需的，其他 Rails 版本也可能如此。如果你在做没有 Rails 的普通 Ruby，它是必需的。
回答by Wilhelm
All you have to do is look at the request object in your controller:
您所要做的就是查看控制器中的请求对象：
request.host_with_port
or if you don't want the port, just
或者，如果您不想要端口，只需
request.host
回答by btelles
Use backticks and the command hostname
使用反引号和命令 hostname
current_host = `hostname`
This sends the command to the shell, and returns the hostname. Works on at least: Debian Linux, Windows, Solaris.
这会将命令发送到 shell，并返回主机名。至少适用于：Debian Linux、Windows、Solaris。
回答by webaholik
If you need the full domain path from protocol to port, try:
如果您需要从协议到端口的完整域路径，请尝试：
full_domain_path = request.env['rack.url_scheme'] + '://' + request.host_with_port
