text: import json
  import os
  
  
  def application(environ, start_response):
      uid = os.geteuid()
      gid = os.getegid()
  
      out = json.dumps({'UID': uid, 'GID': gid,}).encode('utf-8')
  
      start_response(
          '200 OK',
          [
              ('Content-Length', str(len(out))),
              ('Content-Type', 'application/json'),
          ],
      )
  
      return [out]
  