python runtime_error ai_generated true

fastapi.exceptions.HTTPException: 404 Not Found

ID: python/fastapi-http-exception-handling

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
0Evidence
2024-08-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The requested resource does not exist, and the code raises an HTTPException with status code 404.

generic

中文

请求的资源不存在，代码抛出了状态码为404的HTTPException。

Workarounds

  1. 95% success Raise HTTPException with appropriate status code and message 
    from fastapi import HTTPException
raise HTTPException(status_code=404, detail="Item not found")
  2. 90% success Use exception handlers for custom responses 
    @app.exception_handler(HTTPException)
async def http_exception_handler(request, exc):
    return JSONResponse(status_code=exc.status_code, content={"error": exc.detail})

Dead Ends

Common approaches that don't work:

  1. Returning a generic error message without raising HTTPException 70% fail

    Does not properly signal the error to the client; may cause confusion.

  2. Catching the exception and returning a 200 status 85% fail

    Misrepresents the error; client thinks the request succeeded.