#----------------------------------------------------------------------------- # Copyright (c) 2012 - 2020, Anaconda, Inc., and Bokeh Contributors. # All rights reserved. # # The full license is in the file LICENSE.txt, distributed with this software. #----------------------------------------------------------------------------- ''' Provide a request handler that returns a json with metadata information from the application ''' #----------------------------------------------------------------------------- # Boilerplate #----------------------------------------------------------------------------- import logging # isort:skip log = logging.getLogger(__name__) #----------------------------------------------------------------------------- # Imports #----------------------------------------------------------------------------- # Standard library imports import json # External imports from tornado.web import authenticated # Bokeh imports from .auth_mixin import AuthMixin from .session_handler import SessionHandler #----------------------------------------------------------------------------- # Globals and constants #----------------------------------------------------------------------------- __all__ = ( 'MetadataHandler', ) #----------------------------------------------------------------------------- # General API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Dev API #----------------------------------------------------------------------------- [docs]class MetadataHandler(SessionHandler, AuthMixin): ''' Implements a custom Tornado handler for document display page ''' @authenticated async def get(self, *args, **kwargs): url = self.application_context.url userdata = self.application_context.application.metadata if callable(userdata): userdata = userdata() if userdata is None: userdata = {} metadata = dict(url=url, data=userdata) self.set_header("Content-Type", 'application/json') self.write(json.dumps(metadata)) #----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------