Source code for bokeh.server.views.session_handler

''' Abstract request handler that handles bokeh-session-id

'''
from __future__ import absolute_import, print_function

import logging
log = logging.getLogger(__name__)

from tornado import gen
from tornado.web import RequestHandler, HTTPError

from bokeh.util.session_id import generate_session_id, check_session_id_signature

[docs]class SessionHandler(RequestHandler): ''' Implements a custom Tornado handler for document display page ''' def __init__(self, tornado_app, *args, **kw): self.application_context = kw['application_context'] self.bokeh_websocket_path = kw['bokeh_websocket_path'] # Note: tornado_app is stored as self.application super(SessionHandler, self).__init__(tornado_app, *args, **kw)
[docs] def initialize(self, *args, **kw): pass
@gen.coroutine def get_session(self): session_id = self.get_argument("bokeh-session-id", default=None) if session_id is None: if self.application.generate_session_ids: session_id = generate_session_id(secret_key=self.application.secret_key, signed=self.application.sign_sessions) else: log.debug("Server configured not to generate session IDs and none was provided") raise HTTPError(status_code=403, reason="No bokeh-session-id provided") elif not check_session_id_signature(session_id, secret_key=self.application.secret_key, signed=self.application.sign_sessions): log.error("Session id had invalid signature: %r", session_id) raise HTTPError(status_code=403, reason="Invalid session ID") session = yield self.application_context.create_session_if_needed(session_id, self.request) raise gen.Return(session)