问题
I am trying to get the hostname of the machine which a rails application is running on from the controller.
What would be the best way to do this taking into account it should work on both windows and linux?
回答1:
There's always:
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.
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.
回答2:
All you have to do is look at the request object in your controller:
request.host_with_port
or if you don't want the port, just
request.host
回答3:
Use backticks and the command hostname
current_host = `hostname`
This sends the command to the shell, and returns the hostname. Works on at least: Debian Linux, Windows, Solaris.
回答4:
If you need the full domain path from protocol to port, try:
full_domain_path = request.env['rack.url_scheme'] + '://' + request.host_with_port
来源：https://stackoverflow.com/questions/2208835/get-hostname-from-rails-controller