Source code for bokeh.server.views.autoload_js_handler

#-----------------------------------------------------------------------------
# Copyright (c) 2012 - 2020, Anaconda, Inc., and Bokeh Contributors.
# All rights reserved.
#
# The full license is in the file LICENSE.txt, distributed with this software.
#-----------------------------------------------------------------------------
''' Provide a request handler that returns a page displaying a document.

'''

#-----------------------------------------------------------------------------
# Boilerplate
#-----------------------------------------------------------------------------
import logging # isort:skip
log = logging.getLogger(__name__)

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------

# Standard library imports
from urllib.parse import urlparse

# Bokeh imports
from bokeh.core.templates import AUTOLOAD_JS
from bokeh.embed.bundle import Script, bundle_for_objs_and_resources
from bokeh.embed.elements import script_for_render_items
from bokeh.embed.util import RenderItem

# Bokeh imports
from .session_handler import SessionHandler

#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------

__all__ = (
    'AutoloadJsHandler',
)

#-----------------------------------------------------------------------------
# General API
#-----------------------------------------------------------------------------

#-----------------------------------------------------------------------------
# Dev API
#-----------------------------------------------------------------------------

[docs]class AutoloadJsHandler(SessionHandler): ''' Implements a custom Tornado handler for the autoload JS chunk '''
[docs] def set_default_headers(self): self.set_header("Access-Control-Allow-Headers", "*") self.set_header('Access-Control-Allow-Methods', 'PUT, GET, OPTIONS') self.set_header("Access-Control-Allow-Origin", "*")
async def get(self, *args, **kwargs): session = await self.get_session() element_id = self.get_argument("bokeh-autoload-element", default=None) if not element_id: self.send_error(status_code=400, reason='No bokeh-autoload-element query parameter') return app_path = self.get_argument("bokeh-app-path", default="/") absolute_url = self.get_argument("bokeh-absolute-url", default=None) if absolute_url: server_url = '{uri.scheme}://{uri.netloc}'.format(uri=urlparse(absolute_url)) else: server_url = None resources_param = self.get_argument("resources", "default") resources = self.application.resources(server_url) if resources_param != "none" else None bundle = bundle_for_objs_and_resources(None, resources) render_items = [RenderItem(token=session.token, elementid=element_id, use_for_title=False)] bundle.add(Script(script_for_render_items(None, render_items, app_path=app_path, absolute_url=absolute_url))) js = AUTOLOAD_JS.render(bundle=bundle, elementid=element_id) self.set_header("Content-Type", 'application/javascript') self.write(js)
[docs] async def options(self, *args, **kwargs): '''Browsers make OPTIONS requests under the hood before a GET request'''
#----------------------------------------------------------------------------- # Private API #----------------------------------------------------------------------------- #----------------------------------------------------------------------------- # Code #-----------------------------------------------------------------------------