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Editing: runtime.rb
# frozen_string_literal: true module Rack # Sets an "X-Runtime" response header, indicating the response # time of the request, in seconds # # You can put it right before the application to see the processing # time, or before all the other middlewares to include time for them, # too. class Runtime FORMAT_STRING = "%0.6f" # :nodoc: HEADER_NAME = "X-Runtime" # :nodoc: def initialize(app, name = nil) @app = app @header_name = HEADER_NAME @header_name += "-#{name}" if name end def call(env) start_time = Utils.clock_time status, headers, body = @app.call(env) headers = Utils::HeaderHash[headers] request_time = Utils.clock_time - start_time unless headers.key?(@header_name) headers[@header_name] = FORMAT_STRING % request_time end [status, headers, body] end end end
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