vendor/rails/railties/lib/rails/rack/static.rb

   1 require 'rack/utils'
   2
   3 module Rails
   4   module Rack
   5     class Static
   6       FILE_METHODS = %w(GET HEAD).freeze
   7
   8       def initialize(app)
   9         @app = app
  10         @file_server = ::Rack::File.new(File.join(RAILS_ROOT, "public"))
  11       end
  12
  13       def call(env)
  14         path        = env['PATH_INFO'].chomp('/')
  15         method      = env['REQUEST_METHOD']
  16
  17         if FILE_METHODS.include?(method)
  18           if file_exist?(path)
  19             return @file_server.call(env)
  20           else
  21             cached_path = directory_exist?(path) ? "#{path}/index" : path
  22             cached_path += ::ActionController::Base.page_cache_extension
  23
  24             if file_exist?(cached_path)
  25               env['PATH_INFO'] = cached_path
  26               return @file_server.call(env)
  27             end
  28           end
  29         end
  30
  31         @app.call(env)
  32       end
  33
  34       private
  35         def file_exist?(path)
  36           full_path = File.join(@file_server.root, ::Rack::Utils.unescape(path))
  37           File.file?(full_path) && File.readable?(full_path)
  38         end
  39
  40         def directory_exist?(path)
  41           full_path = File.join(@file_server.root, ::Rack::Utils.unescape(path))
  42           File.directory?(full_path) && File.readable?(full_path)
  43         end
  44     end
  45   end
  46 end