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-rw-r--r--railties/lib/rails/rack/static.rb35
1 files changed, 35 insertions, 0 deletions
diff --git a/railties/lib/rails/rack/static.rb b/railties/lib/rails/rack/static.rb
new file mode 100644
index 0000000000..45eb0e5921
--- /dev/null
+++ b/railties/lib/rails/rack/static.rb
@@ -0,0 +1,35 @@
+module Rails
+ module Rack
+ class Static
+ FILE_METHODS = %w(GET HEAD).freeze
+
+ def initialize(app)
+ @app = app
+ @file_server = ::Rack::File.new(File.join(RAILS_ROOT, "public"))
+ end
+
+ def call(env)
+ path = env['PATH_INFO'].chomp('/')
+ method = env['REQUEST_METHOD']
+ cached_path = (path.empty? ? 'index' : path) + ::ActionController::Base.page_cache_extension
+
+ if FILE_METHODS.include?(method)
+ if file_exist?(path)
+ return @file_server.call(env)
+ elsif file_exist?(cached_path)
+ env['PATH_INFO'] = cached_path
+ return @file_server.call(env)
+ end
+ end
+
+ @app.call(env)
+ end
+
+ private
+ def file_exist?(path)
+ full_path = File.join(@file_server.root, ::Rack::Utils.unescape(path))
+ File.file?(full_path) && File.readable?(full_path)
+ end
+ end
+ end
+end