python runtime_error ai_generated true

FastAPI HTTP异常：404未找到

fastapi.HTTPException: 404 Not Found

ID: python/fastapi-httpexception-not-found

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
0证据数
2024-06-15首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

请求的URL与任何定义的路由不匹配。

English

Requested URL does not match any defined route.

generic

解决方案

  1. 90% 成功率 Verify URL and method match a route 
    Check app routes: for route in app.routes: print(route.path, route.methods)
  2. 80% 成功率 Add a catch-all route for debugging 
    @app.api_route('/{path:path}', methods=['GET', 'POST'])
async def catch_all(path: str):
    return {'path': path}

无效尝试

常见但无效的做法:

  1. Assuming trailing slash doesn't matter 50% 失败

    FastAPI distinguishes between /path and /path/ unless configured.

  2. Using wrong HTTP method 70% 失败

    Route may exist but not for the used method (e.g., POST vs GET).