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# Copyright (c) 2012 - 2021, 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 page displaying a document.
'''
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# Boilerplate
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from __future__ import annotations
import logging # isort:skip
log = logging.getLogger(__name__)
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# Imports
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# 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
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# Globals and constants
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__all__ = (
'AutoloadJsHandler',
)
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# General API
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# Dev API
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[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({}, 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'''
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# Private API
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# Code
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