mirror of
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78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
import logging
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from typing import Any
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from fastapi import Request
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from fastapi.encoders import jsonable_encoder
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from fastapi.exceptions import RequestValidationError
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from fastapi.responses import JSONResponse
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from starlette.types import ASGIApp, Receive, Scope, Send
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from private_gpt.events.event_errors import Errors
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from private_gpt.events.models import FatalError
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logger = logging.getLogger(__name__)
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def _fatal_error_payload(error: BaseException) -> tuple[int, dict[str, Any]]:
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wrapped_exception = Errors.build(error)
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payload = jsonable_encoder(FatalError.from_exception(error).model_dump())
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explanation = payload.get("error", {}).get("detail", {}).get("explanation")
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if explanation is not None:
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payload["detail"] = explanation
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return wrapped_exception.status_code, payload
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class ExceptionMiddleware:
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def __init__(self, app: ASGIApp):
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self.app = app
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async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
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if scope["type"] != "http":
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await self.app(scope, receive, send)
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return
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async def send_wrapper(message: Any) -> None:
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await send(message)
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try:
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await self.app(scope, receive, send_wrapper)
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except Exception as exc:
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logger.error("Unhandled exception occurred", exc_info=exc)
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response = self._create_error_response(exc)
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await response(scope, receive, send)
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def _create_error_response(self, exc: Exception) -> JSONResponse:
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"""Create appropriate error response based on exception type."""
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status_code, fatal_error = _fatal_error_payload(exc)
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return JSONResponse(
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status_code=status_code,
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content=jsonable_encoder(fatal_error),
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)
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async def request_validation_exception_handler(
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request: Request, exc: RequestValidationError
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) -> JSONResponse:
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del request # Request currently unused.
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wrapped_exception = Errors.InvalidRequest(
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"Request validation failed",
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event_code=Errors.Codes.INVALID_REQUEST_ERROR,
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status_code=400,
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original_exception=exc,
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)
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_, payload = _fatal_error_payload(wrapped_exception)
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return JSONResponse(status_code=400, content=jsonable_encoder(payload))
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async def request_validation_exception_adapter(
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request: Request, exc: Exception
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) -> JSONResponse:
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if isinstance(exc, RequestValidationError):
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return await request_validation_exception_handler(request, exc)
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status_code, payload = _fatal_error_payload(exc)
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return JSONResponse(
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status_code=status_code,
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content=jsonable_encoder(payload),
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)
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