如何从 url 获取子域值?

本文介绍了如何从 url 获取子域值?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

如何在 rails 中获取子域值，是否有内置方法可以做到这一点?

how can I get the subdomain value in rails, is there a built-in way to do this?

例如

test123.example.com

我想要网址的 test123 部分.

I want the test123 part of the url.

推荐答案

Rails 3.0 内置了此功能，您可以从 request.subdomain 访问子域.

Rails 3.0 has this capability built-in, you can access the subdomain from request.subdomain.

您也可以根据子域进行路由:

You can also route based on the subdomain:

class SupportSubdomain
  def self.matches?(request)
    request.subdomain == "support"
  end
end

Basecamp::Application.routes do
  constraints(SupportSubdomain) do
    match "/foo/bar", :to => "foo#bar"
  end
end

如果您使用的是 2.3，则需要使用诸如 subdomain-fu.

If you're using 2.3, you'll need to use a plugin such as subdomain-fu.

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