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)