Source code for bokeh.server.views.metadata_handler

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# Copyright (c) 2012 - 2019, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
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''' Provide a request handler that returns a json
    with metadata information from the application

'''

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# Boilerplate
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from __future__ import absolute_import, division, print_function, unicode_literals

import logging
log = logging.getLogger(__name__)

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# Imports
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# Standard library imports
import json

# External imports
from tornado import gen

# Bokeh imports
from .session_handler import SessionHandler

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# Globals and constants
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__all__ = (
    'MetadataHandler',
)

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# General API
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# Dev API
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[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))

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# Private API
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# Code
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