mirror of
https://github.com/home-assistant/core
synced 2024-08-31 05:57:13 +02:00
79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
"""Provide CORS support for the HTTP component."""
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from aiohttp.hdrs import ACCEPT, AUTHORIZATION, CONTENT_TYPE, ORIGIN
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from aiohttp.web_urldispatcher import Resource, ResourceRoute, StaticResource
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from homeassistant.const import HTTP_HEADER_X_REQUESTED_WITH
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from homeassistant.core import callback
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# mypy: allow-untyped-defs, no-check-untyped-defs
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ALLOWED_CORS_HEADERS = [
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ORIGIN,
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ACCEPT,
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HTTP_HEADER_X_REQUESTED_WITH,
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CONTENT_TYPE,
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AUTHORIZATION,
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]
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VALID_CORS_TYPES = (Resource, ResourceRoute, StaticResource)
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@callback
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def setup_cors(app, origins):
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"""Set up CORS."""
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# This import should remain here. That way the HTTP integration can always
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# be imported by other integrations without it's requirements being installed.
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# pylint: disable=import-outside-toplevel
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import aiohttp_cors
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cors = aiohttp_cors.setup(
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app,
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defaults={
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host: aiohttp_cors.ResourceOptions(
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allow_headers=ALLOWED_CORS_HEADERS, allow_methods="*"
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)
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for host in origins
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},
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)
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cors_added = set()
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def _allow_cors(route, config=None):
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"""Allow CORS on a route."""
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if hasattr(route, "resource"):
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path = route.resource
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else:
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path = route
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if not isinstance(path, VALID_CORS_TYPES):
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return
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path = path.canonical
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if path.startswith("/api/hassio_ingress/"):
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return
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if path in cors_added:
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return
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cors.add(route, config)
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cors_added.add(path)
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app["allow_cors"] = lambda route: _allow_cors(
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route,
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{
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"*": aiohttp_cors.ResourceOptions(
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allow_headers=ALLOWED_CORS_HEADERS, allow_methods="*"
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)
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},
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)
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if not origins:
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return
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async def cors_startup(app):
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"""Initialize CORS when app starts up."""
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for resource in list(app.router.resources()):
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_allow_cors(resource)
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app.on_startup.append(cors_startup)
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