feat: enhance exception handling with additional handlers for HTTP and validation errors

middleware/exception_handler.py

@@ -1,10 +1,49 @@
-from fastapi import Request, status
+import logging
+from fastapi import Request, status, HTTPException
 from fastapi.responses import JSONResponse
+from fastapi.exceptions import RequestValidationError
+import httpx
+
+logger = logging.getLogger(__name__)
+
+
+async def http_exception_handler(request: Request, exc: HTTPException):
+    detail = exc.detail if exc.detail is not None else str(exc)
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={"error": "HTTPException", "detail": detail},
+        headers=exc.headers,
+    )
+
+
+async def validation_exception_handler(request: Request, exc: RequestValidationError):
+    return JSONResponse(
+        status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+        content={"error": "Validation Error", "detail": exc.errors()},
+    )
+
+
+async def httpx_exception_handler(request: Request, exc: httpx.HTTPStatusError):
+    resp = exc.response
+    status_code = resp.status_code if resp is not None else status.HTTP_500_INTERNAL_SERVER_ERROR
+    detail = None
+    if resp is not None:
+        detail = resp.text or resp.reason_phrase
+    if not detail:
+        detail = str(exc)
+    return JSONResponse(
+        status_code=status_code,
+        content={"error": "Upstream HTTP error", "detail": detail},
+    )
+
 
 async def global_exception_handler(request: Request, exc: Exception):
-    """
-    全局异常处理
-    """
+    logger.exception(
+        "Unhandled exception %s %s",
+        request.method,
+        request.url.path,
+        exc_info=(type(exc), exc, exc.__traceback__),
+    )
     return JSONResponse(
         status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
         content={"error": "Internal Server Error", "detail": str(exc)},