Rails 路由以在单个应用程序上处理多个域 [英] Rails routing to handle multiple domains on single application

问题描述

尽管这里和其他地方有几个类似的问题，但我一直无法找到解决此问题的可行解决方案.Rails 3 似乎还没有回答这个问题，所以这里是:

I've been unable to find a workable solution to this problem, despite several similar questions here and elsewhere. It seems likely that this question hasn't been answered for Rails 3, so here goes:

我有一个应用程序，目前允许用户创建自己的子域，其中包含他们的应用程序实例.虽然在 Rails 2 中你最好使用 subdomain-fu gem，但在版本 3 中它非常简单，根据 Railscast -- http://railscasts.com/episodes/221-subdomains-in-rails-3.

I have an application that currently allows users to create their own subdomain that contains their instance of the application. While in Rails 2 you were best served using the subdomain-fu gem, in version 3 it's dramatically simpler, as per the Railscast -- http://railscasts.com/episodes/221-subdomains-in-rails-3.

这是个好东西，但我还想为用户提供将他们自己的域名与他们的帐户相关联的选项.因此，虽然他们可能拥有 http://userx.mydomain.com，但我希望他们选择拥有 http://userx.com 也相关联.

That's good stuff, but I also want to provide the option for users to associate their own domain name with their account. So while they might have http://userx.mydomain.com, I'd like them to choose to have http://userx.com associated as well.

我在 Rails 2 中找到了一些关于这样做的参考，但这些技术似乎不再起作用(尤其是这个:https://feefighters.com/blog/hosting-multiple-domains-from-a-single-rails-app/).

I found a few references to doing this in Rails 2, but those techniques don't appear to work anymore (particularly this one: https://feefighters.com/blog/hosting-multiple-domains-from-a-single-rails-app/).

谁能推荐一种使用路由接受任意域并将其传递给控制器​​以便我可以显示适当内容的方法?

Can anyone recommend a way to use routes to accept an arbitrary domain and pass it along to a controller so I can show the appropriate content?

更新:多亏了 Leonid 的及时回复以及对代码的全新审视，我现在已经得到了大部分答案.它最终需要添加到我使用的现有子域代码(来自 Railscast 解决方案)，然后添加一些到 routes.rb.我还没有完全完成，但我想发布我目前所拥有的.

Update: I've gotten most of an answer now, thanks to Leonid's timely response, and a fresh look at the code. It ultimately required an addition to the existing Subdomain code that I was using (from the Railscast solution) and then adding a bit to routes.rb. I'm not all the way there yet but I want to post what I have so far.

在 lib/subdomain.rb 中:

In lib/subdomain.rb:

class Subdomain
  def self.matches?(request)
    request.subdomain.present? && request.subdomain != "www"
  end
end

class Domain
  def self.matches?(request)
    request.domain.present? && request.domain != "mydomain.com"
  end
end

我模仿第一个类添加了第二个类，这是已知的工作.我只是添加了一个条件，以确保传入域不是我托管主站点的域.

I've added the second class in imitation of the first, which is known working. I simply add a condition that ensures that the incoming domain is not the one for which I'm hosting the main site.

这个类在routes.rb中使用:

This class is used in routes.rb:

require 'subdomain'
constraints(Domain) do
  match '/' => 'blogs#show'
end

constraints(Subdomain) do
  match '/' => 'blogs#show'
end

在这里，我在现有的子域代码(同样，它工作正常)之前添加了一个节来检查域.如果此服务器响应该域并且它不是主站点运行的域，则转发到指定的控制器.

Here, I'm prepending the existing subdomain code (again, it's working fine) with a stanza to check for the Domain. If this server responds to that domain and it's not the one under which the main site operates, forward to the specified controller.

虽然这似乎有效，但我还没有完全搞定，但我认为这个特殊问题已经解决.

And while that appears to be working, I don't quite have the whole thing working yet, but I think this particular problem has been solved.

推荐答案

Rails 3 实际上更简单，根据 http://guides.rubyonrails.org/routing.html#advanced-constraints:

It's actually simpler in Rails 3, as per http://guides.rubyonrails.org/routing.html#advanced-constraints:

1) 在 lib/domain_constraint.rb 中定义自定义约束类:

1) define a custom constraint class in lib/domain_constraint.rb:

class DomainConstraint
  def initialize(domain)
    @domains = [domain].flatten
  end

  def matches?(request)
    @domains.include? request.domain
  end
end

2) 使用新的块语法在路由中使用类

2) use the class in your routes with the new block syntax

constraints DomainConstraint.new('mydomain.com') do
  root :to => 'mydomain#index'
end

root :to => 'main#index'

或老式的选项语法

root :to => 'mydomain#index', :constraints => DomainConstraint.new('mydomain.com')

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