Source code for bokeh.server.views.root_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 lists the application (if more than one)
or (if only one) redirects to the route of that applications.

'''

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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

# External imports
from tornado import gen
from tornado.web import RequestHandler

# Bokeh imports

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

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# General API
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# Dev API
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[docs]class RootHandler(RequestHandler):
    ''' Implements a custom Tornado handler to display the available applications
    If only one application it redirects to that application route
    '''

[docs]    def initialize(self, *args, **kw):
        self.applications = kw["applications"]
        self.prefix = kw["prefix"]
        self.index = kw["index"]
        self.use_redirect = kw["use_redirect"]

    @gen.coroutine
    def get(self, *args, **kwargs):
        prefix = "" if self.prefix is None else self.prefix
        if self.use_redirect and len(self.applications) == 1:
            app_names = list(self.applications.keys())
            redirect_to = prefix + app_names[0]
            self.redirect(redirect_to)
        else:
            index = "app_index.html" if self.index is None else self.index
            self.render(index, prefix=prefix, items=sorted(self.applications.keys()))

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# Private API
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# Code
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