初始化

middle/error_handler.py

@@ -0,0 +1,68 @@
+from fastapi import Request, status
+from fastapi.responses import JSONResponse
+from fastapi.exceptions import HTTPException, RequestValidationError
+from mysql.connector import Error as MySQLError
+from jose import JWTError
+
+from schema.response_schema import APIResponse
+
+
+async def global_exception_handler(request: Request, exc: Exception):
+    """全局异常处理器：所有未捕获的异常都会在这里统一处理"""
+    # 1. 请求参数验证错误（Pydantic 校验失败）
+    if isinstance(exc, RequestValidationError):
+        error_details = []
+        for err in exc.errors():
+            error_details.append(f"{err['loc'][1]}: {err['msg']}")
+        return JSONResponse(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            content=APIResponse(
+                code=400,
+                message=f"请求参数错误：{'; '.join(error_details)}",
+                data=None
+            ).model_dump()
+        )
+
+    # 2. HTTP 异常（主动抛出的业务错误、如 401/404）
+    if isinstance(exc, HTTPException):
+        return JSONResponse(
+            status_code=exc.status_code,
+            content=APIResponse(
+                code=exc.status_code,
+                message=exc.detail,
+                data=None
+            ).model_dump()
+        )
+
+    # 3. JWT 相关错误（Token 无效/过期）
+    if isinstance(exc, JWTError):
+        return JSONResponse(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            content=APIResponse(
+                code=401,
+                message="Token 无效或已过期",
+                data=None
+            ).model_dump(),
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+
+    # 4. MySQL 数据库错误
+    if isinstance(exc, MySQLError):
+        return JSONResponse(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            content=APIResponse(
+                code=500,
+                message=f"数据库错误：{str(exc)}",
+                data=None
+            ).model_dump()
+        )
+
+    # 5. 其他未知错误（兜底处理）
+    return JSONResponse(
+        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+        content=APIResponse(
+            code=500,
+            message=f"服务器内部错误：{str(exc)}",
+            data=None
+        ).model_dump()
+    )