gistfile1.rb

class MyAmazingWebApp

	@@headers = {
		"Content-Type" => "text/html",
		"My-Amazing-Header" => "coolbeans"
	}.freeze

	def call(env)
    begin
      [200, @@headers, File.open("public#{env['PATH_INFO']}")]
    rescue Errno::ENOENT => e
      [404, @@headers, ["Sorry couldn't find your file #{e.message}"]]
    end
  end

end