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mirror of https://github.com/etesync/server synced 2024-11-22 16:58:08 +00:00
etesync-server/etebase_fastapi/msgpack.py
Tom Hacohen 2e21fe4994 Django db cleanup: explicitly add it to dependencies.
We can't really add it manually, because some of the deps are auto included as
parameters. These were not being decorated which in turn meeant issues.
2020-12-31 10:03:16 +02:00

77 lines
2.9 KiB
Python

import typing as t
from fastapi.routing import APIRoute, get_request_handler
from pydantic import BaseModel
from starlette.requests import Request
from starlette.responses import Response
from .utils import msgpack_encode, msgpack_decode
from .db_hack import django_db_cleanup_decorator
class MsgpackRequest(Request):
media_type = "application/msgpack"
async def json(self) -> bytes:
if not hasattr(self, "_json"):
body = await super().body()
self._json = msgpack_decode(body)
return self._json
class MsgpackResponse(Response):
media_type = "application/msgpack"
def render(self, content: t.Optional[t.Any]) -> bytes:
if content is None:
return b""
if isinstance(content, BaseModel):
content = content.dict()
return msgpack_encode(content)
class MsgpackRoute(APIRoute):
# keep track of content-type -> request classes
REQUESTS_CLASSES = {MsgpackRequest.media_type: MsgpackRequest}
# keep track of content-type -> response classes
ROUTES_HANDLERS_CLASSES = {MsgpackResponse.media_type: MsgpackResponse}
def __init__(self, path: str, endpoint: t.Callable[..., t.Any], *args, **kwargs):
endpoint = django_db_cleanup_decorator(endpoint)
super().__init__(path, endpoint, *args, **kwargs)
def _get_media_type_route_handler(self, media_type):
return get_request_handler(
dependant=self.dependant,
body_field=self.body_field,
status_code=self.status_code,
# use custom response class or fallback on default self.response_class
response_class=self.ROUTES_HANDLERS_CLASSES.get(media_type, self.response_class),
response_field=self.secure_cloned_response_field,
response_model_include=self.response_model_include,
response_model_exclude=self.response_model_exclude,
response_model_by_alias=self.response_model_by_alias,
response_model_exclude_unset=self.response_model_exclude_unset,
response_model_exclude_defaults=self.response_model_exclude_defaults,
response_model_exclude_none=self.response_model_exclude_none,
dependency_overrides_provider=self.dependency_overrides_provider,
)
def get_route_handler(self) -> t.Callable:
async def custom_route_handler(request: Request) -> Response:
content_type = request.headers.get("Content-Type")
try:
request_cls = self.REQUESTS_CLASSES[content_type]
request = request_cls(request.scope, request.receive)
except KeyError:
# nothing registered to handle content_type, process given requests as-is
pass
accept = request.headers.get("Accept")
route_handler = self._get_media_type_route_handler(accept)
return await route_handler(request)
return custom_route_handler