身份验证筛选器不适用于 Web API 中的授权筛选器

Question

我正在尝试为 ASP.NET Web API 创建自定义身份验证过滤器。下面是我的身份验证过滤器的代码

public class IDPAuthenticationFilter : AuthorizationFilterAttribute
{
    public override void OnAuthorization(HttpActionContext actionContext)
    {
        var identity = new ClaimsIdentity();
        identity.AddClaim(new Claim(ClaimTypes.Name, "testUser"));
        identity.AddClaim(new Claim(ClaimTypes.Role, "client"));
        identity.AddClaim(new Claim("testUser"));
        identity.AddClaim(new Claim("APP:USERID", "50123"));
        var principal = new GenericPrincipal(identity, new string[] { });
        Thread.CurrentPrincipal = principal;
        HttpContext.Current.User = principal;
        base.OnAuthorization(actionContext);
    }
}

我已经全局配置了身份验证过滤器，并使用断点确认正在调用过滤器。

config.Filters.Add(new IDPAuthenticationFilter());

问题是如果我[System.Web.Http.Authorize]属性添加到任何控制器，则会收到 401 未经授权的错误。我能够在控制器操作中使用User.Identity.Name访问用户名，但是如果我添加授权属性，则会出现错误。我有什么遗漏吗？

谢谢你的时间。如果需要任何其他信息，请添加评论。

Answer 1

有几件事我做错了。首先，我需要实现IAuthenticationFilter而不是AuthorizationFilterAttribute

其次，我设置身份的方式不正确。下面是对我有用的代码。

public class IDPAuthenticationFilter : Attribute, IAuthenticationFilter 
{
    public bool AllowMultiple => false;
    public async Task AuthenticateAsync (HttpAuthenticationContext context, CancellationToken cancellationToken) 
    {
        HttpRequestMessage request = context.Request;
        AuthenticationHeaderValue authorization = request.Headers.Authorization;
        if (authorization == null) {
            return;
        }
        if (authorization.Scheme != "Bearer") {
            return;
        }
        var claims = new List<Claim> ();
        claims.Add (new Claim (ClaimTypes.Name, "testUser"));
        claims.Add (new Claim (ClaimTypes.Role, "client"));
        claims.Add (new Claim ("sub", "testUser"));
        claims.Add (new Claim("APP:USERID", "50123"));
        var identity = new ClaimsIdentity (claims, "Auth_Key");
        var principal = new ClaimsPrincipal (new [] { identity });
        context.Principal = principal;
        HttpContext.Current.User = context.Principal;
        Thread.CurrentPrincipal = context.Principal;
    }
}