Dvorak
Dvorak

Dvorak Chen

All Posts in 2024.8


supplement of Authentication

This article delves into a critical yet often overlooked aspect of .NET authentication—the handling of authentication failures in distributed architectures. While the default cookie-based authentication configuration redirects unauthorized requests to `/Account/Login` with a 302 status code, this approach breaks when applications are decoupled into frontend and backend services. The hardcoded backend domain in the redirect location causes frontend clients to encounter invalid endpoints, creating a silent failure loop. The author identifies a fundamental limitation in the framework's design: the inability to customize the redirect domain through `options.LoginPath`, which forces developers to rethink traditional authentication workflows. A practical solution emerges by swapping the 302 redirect for a 401 Unauthorized response, enabling frontend applications to intercept the status code and implement custom login logic. This approach leverages API interceptors (demonstrated with Axios) t...--Qwen3

.NET .NET Authentication Authorization Handling Cookie Policy Authentication Failure HTTP 401 Response

dotnet Authentication and Authorization

本文围绕.NET平台的身份验证与授权机制展开探讨重点解析了Cookie认证的实现原理与自定义授权策略的构建方法。文章通过代码示例展示了如何通过ClaimsPrincipal对象封装用户信息并利用SignIn方法将身份数据写入Cookie同时指出浏览器客户端对Cookie的自动管理优势使其成为Web及TauriElectron等框架的首选方案。在授权部分作者对比了基于声明的简单校验与需要数据库访问的复杂验证场景提出了通过继承AuthorizeAttribute并实现IAuthorizationRequirement接口的自定义授权方案。这种通过AuthorizationHandler注入业务逻辑的设计模式不仅实现了细粒度权限控制还保持了与依赖注入容器的兼容性。值得注意的是文章特别强调了自定义授权处理器中context.Succeed与context.Fail的调用时机揭示了.NET安全框架的底层响应机制。当开发者面对需要动态查询数据库或验证外部服务的授权场景时如何设计可复用的授权策略如何在保证安全性的同时避免过度设计如何通过Claim体系扩展用户身份信息这些开放式问题都值得在实际开发中深入思考与实践。--Qwen3

.NET Authentication Cookies ClaimsPrincipal Authorization Custom Authorization Handler