JiriUhlir
102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
"""Typované výjimky + centrální exception handlery.
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Platí pravidlo: žádná tichá selhání — každá chyba se loguje (bez secrets).
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"""
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from fastapi import FastAPI, Request
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from fastapi.responses import JSONResponse
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from .logging_config import get_logger
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log = get_logger("audio-transcription.errors")
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class TranscriptionError(Exception):
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"""Základní chyba služby s HTTP status kódem."""
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status_code = 500
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def __init__(self, message: str, status_code: int | None = None, detail=None):
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super().__init__(message)
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self.message = message
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if status_code is not None:
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self.status_code = status_code
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self.detail = detail
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class CredentialsError(TranscriptionError):
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"""Chybějící / neplatné přihlašovací údaje (X- hlavičky)."""
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status_code = 401
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class BadRequestError(TranscriptionError):
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"""Neplatný vstup (chybí audio, špatné parametry)."""
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status_code = 400
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class RateLimitError(TranscriptionError):
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"""Upstream rate limit (HTTP 429)."""
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status_code = 429
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class UpstreamError(TranscriptionError):
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"""Chyba při volání upstream API (Deepgram / OpenAI)."""
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status_code = 502
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def raise_for_upstream(upstream: str, status: int, body: str) -> None:
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"""Zmapuje HTTP status z upstreamu (Deepgram/OpenAI) na správnou chybu služby.
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- 400/415/422 → 400 (špatný / nepodporovaný audio soubor = chyba klienta)
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- 401/403 → 401 (upstream odmítl API klíč volajícího)
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- 429 → 429 (rate limit)
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- jinak → 502 (výpadek / neočekávaná chyba upstreamu)
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"""
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snippet = (body or "")[:500]
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if status in (400, 415, 422):
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raise BadRequestError(
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f"{upstream} odmítl audio (HTTP {status}) — pravděpodobně nepodporovaný "
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f"formát nebo poškozený soubor.",
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detail=snippet,
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)
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if status in (401, 403):
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raise CredentialsError(
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f"{upstream} odmítl API klíč (HTTP {status}).",
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detail=snippet,
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)
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if status == 429:
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raise RateLimitError(f"{upstream} rate limit (HTTP 429).", detail=snippet)
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raise UpstreamError(f"{upstream} vrátil chybu {status}.", detail=snippet)
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def register_exception_handlers(app: FastAPI) -> None:
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@app.exception_handler(TranscriptionError)
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async def _handle_transcription_error(request: Request, exc: TranscriptionError):
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log.warning(
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"%s on %s: %s",
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exc.__class__.__name__,
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request.url.path,
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exc.message,
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)
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body = {"error": exc.__class__.__name__, "message": exc.message}
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if exc.detail is not None:
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body["detail"] = exc.detail
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return JSONResponse(status_code=exc.status_code, content=body)
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@app.exception_handler(Exception)
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async def _handle_unexpected(request: Request, exc: Exception):
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# Nelogujeme celý stack s možnými secrets ve vstupu; logujeme typ + zprávu.
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log.error(
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"Unhandled %s on %s: %s",
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exc.__class__.__name__,
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request.url.path,
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exc,
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)
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return JSONResponse(
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status_code=500,
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content={"error": "InternalError", "message": "Neočekávaná chyba serveru."},
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)
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