code: def my_request_classifier(environ):
      
      request_method = REQUEST_METHOD(environ)
      if request_method in _DAV_METHODS:
          return "dav"
      useragent = USER_AGENT(environ)
      if useragent:
          for agent in _DAV_USERAGENTS:
              if useragent.find(agent) != -1:
                  return "dav"
      if request_method == "POST":
          if CONTENT_TYPE(environ) == "text/xml":
              return "xmlpost"
          elif CONTENT_TYPE(environ) == "application/soap+xml":
              return "soap"
      return "browser"
docs: Returns one of the classifiers 'dav', 'xmlpost', or 'browser',
      depending on the imperative logic below