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bokeh.server.views.metadata_handler — Bokeh 1.0.0 documentation

Source code for bokeh.server.views.metadata_handler

''' Provide a request handler that returns a json
    with metadata information from the application

'''
from __future__ import absolute_import, print_function

import json
import logging
log = logging.getLogger(__name__)

from tornado import gen

from .session_handler import SessionHandler

[docs]class MetadataHandler(SessionHandler): ''' Implements a custom Tornado handler for document display page ''' @gen.coroutine 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))