第一次提交

backend/app/core/exceptions.py

@@ -0,0 +1,86 @@
+"""
+自定义异常类
+"""
+from fastapi import HTTPException, status
+
+
+class BaseAPIException(HTTPException):
+    """基础API异常"""
+    def __init__(self, status_code: int, detail: str, error_code: str = None):
+        super().__init__(status_code=status_code, detail=detail)
+        self.error_code = error_code
+
+
+class ValidationError(BaseAPIException):
+    """验证错误"""
+    def __init__(self, detail: str):
+        super().__init__(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=detail,
+            error_code="VALIDATION_ERROR"
+        )
+
+
+class NotFoundError(BaseAPIException):
+    """资源未找到错误"""
+    def __init__(self, resource: str, resource_id: str = None):
+        detail = f"{resource}不存在"
+        if resource_id:
+            detail += f": {resource_id}"
+        super().__init__(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=detail,
+            error_code="NOT_FOUND"
+        )
+
+
+class UnauthorizedError(BaseAPIException):
+    """未授权错误"""
+    def __init__(self, detail: str = "未授权访问"):
+        super().__init__(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail=detail,
+            error_code="UNAUTHORIZED"
+        )
+
+
+class ForbiddenError(BaseAPIException):
+    """禁止访问错误"""
+    def __init__(self, detail: str = "无权访问此资源"):
+        super().__init__(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail=detail,
+            error_code="FORBIDDEN"
+        )
+
+
+class ConflictError(BaseAPIException):
+    """资源冲突错误"""
+    def __init__(self, detail: str):
+        super().__init__(
+            status_code=status.HTTP_409_CONFLICT,
+            detail=detail,
+            error_code="CONFLICT"
+        )
+
+
+class InternalServerError(BaseAPIException):
+    """内部服务器错误"""
+    def __init__(self, detail: str = "服务器内部错误"):
+        super().__init__(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=detail,
+            error_code="INTERNAL_ERROR"
+        )
+
+
+class WorkflowExecutionError(BaseAPIException):
+    """工作流执行错误"""
+    def __init__(self, detail: str, node_id: str = None):
+        if node_id:
+            detail = f"节点 {node_id} 执行失败: {detail}"
+        super().__init__(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=detail,
+            error_code="WORKFLOW_EXECUTION_ERROR"
+        )