Agent Zero
24fb384cf9
Removing __annotations__ broke body parameter resolution: FastAPI could
not resolve ForwardRef('ConversationCreate') etc. causing 422 on all
POST routes with body params. Now keeping annotations from functools.wraps
and only removing return_annotation.
45 lines
1.8 KiB
Python
45 lines
1.8 KiB
Python
"""Plugin error isolation wrapper."""
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import logging
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import functools
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import inspect
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from fastapi import UploadFile # noqa: F401 — needed for ForwardRef resolution
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from fastapi import WebSocket # noqa: F401 — needed for ForwardRef resolution
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from fastapi.responses import JSONResponse
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logger = logging.getLogger(__name__)
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def wrap_plugin_route(handler):
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"""Decorator that isolates plugin route errors and returns structured JSON.
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Copies the original handler's signature so FastAPI sees the correct
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parameters (path params, query params, body, etc.) instead of *args/**kwargs.
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UploadFile and WebSocket are imported in this module's namespace so
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FastAPI can resolve ForwardRef('UploadFile') and ForwardRef('WebSocket').
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"""
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@functools.wraps(handler)
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async def wrapper(*args, **kwargs):
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try:
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return await handler(*args, **kwargs)
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except Exception as exc:
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logger.error(f'Plugin route error: {exc}', exc_info=True)
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return JSONResponse(
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status_code=500,
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content={'detail': f'Plugin error: {exc}', 'code': 'plugin_error'}
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)
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# Remove __wrapped__ so FastAPI doesn't try to resolve the original signature
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# through the wrapper chain — we set __signature__ explicitly instead.
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if hasattr(wrapper, '__wrapped__'):
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delattr(wrapper, '__wrapped__')
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# Copy the signature from the original handler so FastAPI sees correct params.
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# Keep __annotations__ from functools.wraps (needed for ForwardRef resolution).
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# Remove only the return annotation to avoid response_model issues.
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try:
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orig_sig = inspect.signature(handler)
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wrapper.__signature__ = orig_sig.replace(
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return_annotation=inspect.Signature.empty,
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)
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except (ValueError, TypeError):
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pass
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return wrapper
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