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))