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failsafe_response_body

Importance_1
Ruby on Rails latest stable (v4.0.2) - 1 note - Class: ActionController::Dispatcher

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v2.2.1) is shown here.

failsafe_response_body(status) private

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July 28, 2008 - (v2.0.0 - v2.1.0)
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Bug that looks for "500 .html" rather than "500.html"

There is a very small bug in this method of Rails that causes error pages you change in public/ not to be shown, because Rails looks for “404 .html” and “500 .html” (note the space). The fix is simple.

#{status.to_s[0..3]}

needs to become

#{status.to_s[0...3]}

If you’re like me and don’t want to edit Rails itself, at the bottom of environment.rb, stick some code that overwrites this method to fix the bug. We have the following:

module ActionController
  class Dispatcher
    class << self
      private
        def failsafe_response_body(status)
          error_path = "#{error_file_path}/#{status.to_s[0...3]}.html"
          if File.exist?(error_path)
            File.read(error_path)
          else
            "<html><body><h1>#{status}</h1></body></html>"
          end
        end
    end
  end
end