code: def post(self):
          
          filepath = self.get_body_argument('filepath')
  
          try:
              self.fs.create_directory(filepath)
              encoded_filepath = tornado.escape.url_escape(filepath,plus=True)
              resource_uri = self.reverse_url('filesystem:directories-details', encoded_filepath)
              self.write({'uri':resource_uri})
          except OSError:
              raise tornado.web.HTTPError(404)
docs: Create a new directory at the specified path.