在Heroku Cedar的Rails中为资产设置自定义标题

问题描述

我有一个使用Rails 4.0和资产管道的雪松应用程序。我想为资产管道中的所有资产设置自定义标题。如何做到这一点？

I have a cedar application that uses Rails 4.0 and the asset pipeline. I'd like to set custom headers for all assets from the asset pipeline. How can this be done?

推荐答案

简单的方法是使用机架插件，如下所示：

An easy way would be to use a rack plugin, something like this:

class RackAssetFilter
   def initialize app
      @app = app
   end

   def call env
      @status, @headers, @body = @app.call env
      if env['PATH_INFO'].starts_with?( "/assets/" )
         @headers['X-Header-1'] = 'value'
         # ... 
      end
      return [@status, @headers, @body]
   end
end

要在application.rb中启用它：

To enable it, in application.rb:

config.middleware.insert_before( ActionDispatch::Static, RackAssetFilter )

请记住，您需要通过require声明或加载RackAssetFilter，然后将其插入到application.rb中的中间件堆栈中。

Keep in mind you need to declare or load the RackAssetFilter via require before you insert it into the middleware stack in application.rb

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