902133edd3
- 8 DB models (services, incidents, monitors, subscribers, etc.) - Full CRUD API for services, incidents, monitors - Public status page with live data - Incident detail page with timeline - API key authentication - Uptime monitoring scheduler - 13 tests passing - TECHNICAL_DESIGN.md with full spec
65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
from __future__ import annotations
|
|
|
|
from typing import Any
|
|
|
|
from starlette._utils import is_async_callable
|
|
from starlette.concurrency import run_in_threadpool
|
|
from starlette.exceptions import HTTPException
|
|
from starlette.requests import Request
|
|
from starlette.types import ASGIApp, ExceptionHandler, Message, Receive, Scope, Send
|
|
from starlette.websockets import WebSocket
|
|
|
|
ExceptionHandlers = dict[Any, ExceptionHandler]
|
|
StatusHandlers = dict[int, ExceptionHandler]
|
|
|
|
|
|
def _lookup_exception_handler(exc_handlers: ExceptionHandlers, exc: Exception) -> ExceptionHandler | None:
|
|
for cls in type(exc).__mro__:
|
|
if cls in exc_handlers:
|
|
return exc_handlers[cls]
|
|
return None
|
|
|
|
|
|
def wrap_app_handling_exceptions(app: ASGIApp, conn: Request | WebSocket) -> ASGIApp:
|
|
exception_handlers: ExceptionHandlers
|
|
status_handlers: StatusHandlers
|
|
try:
|
|
exception_handlers, status_handlers = conn.scope["starlette.exception_handlers"]
|
|
except KeyError:
|
|
exception_handlers, status_handlers = {}, {}
|
|
|
|
async def wrapped_app(scope: Scope, receive: Receive, send: Send) -> None:
|
|
response_started = False
|
|
|
|
async def sender(message: Message) -> None:
|
|
nonlocal response_started
|
|
|
|
if message["type"] == "http.response.start":
|
|
response_started = True
|
|
await send(message)
|
|
|
|
try:
|
|
await app(scope, receive, sender)
|
|
except Exception as exc:
|
|
handler = None
|
|
|
|
if isinstance(exc, HTTPException):
|
|
handler = status_handlers.get(exc.status_code)
|
|
|
|
if handler is None:
|
|
handler = _lookup_exception_handler(exception_handlers, exc)
|
|
|
|
if handler is None:
|
|
raise exc
|
|
|
|
if response_started:
|
|
raise RuntimeError("Caught handled exception, but response already started.") from exc
|
|
|
|
if is_async_callable(handler):
|
|
response = await handler(conn, exc)
|
|
else:
|
|
response = await run_in_threadpool(handler, conn, exc)
|
|
if response is not None:
|
|
await response(scope, receive, sender)
|
|
|
|
return wrapped_app
|