old_contents: # -*- coding: utf-8 -*-
  import sys
  
  from tornado import wsgi, web, httpserver, ioloop
  from django.contrib.staticfiles import finders
  from werkzeug.debug import DebuggedApplication
  
  
  class MultiStaticFileHandler(web.StaticFileHandler):
      def initialize(self):
          self.root = ''
  
      def set_extra_headers(self, path):
          self.set_header('Cache-control', 'no-cache')
  
      @classmethod
      def get_absolute_path(cls, root, path):
          return finders.find(path)
  
      def validate_absolute_path(self, root, absolute_path):
          return absolute_path
  
  
  def get_server(debug=settings.DEBUG):
      from keybar.wsgi import application as django_application
      from keybar.utils.logging import enable_error_logging_in_debug_mode
      from keybar.utils.crypto import get_server_context
  
      app = DebuggedApplication(django_application, evalex=debug)
  
      enable_error_logging_in_debug_mode()
  
      container = wsgi.WSGIContainer(app)
  
      application = web.Application([
          (r'/static/(.*)', MultiStaticFileHandler, {}),
          (r'.*', web.FallbackHandler, dict(fallback=container)),
      ], debug=debug)
  
      # TODO: enable verify
      server = httpserver.HTTPServer(
          application,
          ssl_options=get_server_context(verify=settings.KEYBAR_VERIFY_CLIENT_CERTIFICATE))
      return server
  
  
  def run_server():
      server = get_server()
  
      print('Start server on https://keybar.local:8443')
  
      server.listen(8443, 'keybar.local')
  
      try:
          ioloop.IOLoop.instance().start()
      except KeyboardInterrupt:
          sys.exit(0)
  
  
  if __name__ == '__main__':
      run_server()
  
new_contents: # -*- coding: utf-8 -*-
  import sys
  
  from tornado import wsgi, web, httpserver, ioloop
  from django.conf import settings
  from django.contrib.staticfiles import finders
  from werkzeug.debug import DebuggedApplication
  
  
  class MultiStaticFileHandler(web.StaticFileHandler):
      def initialize(self):
          self.root = ''
  
      def set_extra_headers(self, path):
          self.set_header('Cache-control', 'no-cache')
  
      @classmethod
      def get_absolute_path(cls, root, path):
          return finders.find(path)
  
      def validate_absolute_path(self, root, absolute_path):
          return absolute_path
  
  
  def get_server(debug=settings.DEBUG):
      from keybar.wsgi import application as django_application
      from keybar.utils.logging import enable_error_logging_in_debug_mode
      from keybar.utils.crypto import get_server_context
  
      app = DebuggedApplication(django_application, evalex=debug)
  
      enable_error_logging_in_debug_mode()
  
      container = wsgi.WSGIContainer(app)
  
      application = web.Application([
          (r'/static/(.*)', MultiStaticFileHandler, {}),
          (r'.*', web.FallbackHandler, dict(fallback=container)),
      ], debug=debug)
  
      # TODO: enable verify
      server = httpserver.HTTPServer(
          application,
          ssl_options=get_server_context(verify=settings.KEYBAR_VERIFY_CLIENT_CERTIFICATE))
      return server
  
  
  def run_server():
      server = get_server()
  
      print('Start server on https://keybar.local:8443')
  
      server.listen(8443, 'keybar.local')
  
      try:
          ioloop.IOLoop.instance().start()
      except KeyboardInterrupt:
          sys.exit(0)
  
  
  if __name__ == '__main__':
      run_server()
  
subject: Add missing import