c# - WebAPI - 如何从 token 中获取 UserID

Question

我有 WebApi 应用程序并在 ApplicationOAuthProvider 类中将 UserID 添加到 token :

    public override Task TokenEndpoint(OAuthTokenEndpointContext context)
    {
        foreach (KeyValuePair<string, string> property in context.Properties.Dictionary)
        {
            context.AdditionalResponseParameters.Add(property.Key, property.Value);
        }

        context.AdditionalResponseParameters.Add("ID", context.Identity.GetUserId<int>());

        return Task.FromResult<object>(null);
    }

现在如何在我的 Controller 方法中获取此 ID？

我尝试以下操作:

[Authorize]
public class ApiEditorialController : ApiController
{

    public HttpResponseMessage GetEditorialRequests()
    {
        int id = HttpContext.Current.User.Identity.GetUserId<int>();

        var r = Request.CreateResponse(HttpStatusCode.Accepted);
        r.ReasonPhrase = "Cool!";
        return r;
    }

}

但是我在

上得到了 NullReferenceException

int id = HttpContext.Current.User.Identity.GetUserId<int>(); 

字符串....

更新: 查看下面的响应(来自 Francis Ducharme)，只需覆盖 OnAuthorization 而不是创建私有(private)构造函数 :)

public class AuthorizeApiFilter : AuthorizeAttribute
{
    public override void OnAuthorization(HttpActionContext actionContext)
    {
        string token = string.Empty;
        AuthenticationTicket ticket;

        token = (actionContext.Request.Headers.Any(x => x.Key == "Authorization")) ? actionContext.Request.Headers.Where(x => x.Key == "Authorization").FirstOrDefault().Value.SingleOrDefault().Replace("Bearer ", "") : "";

        if (token == string.Empty)
        {
            actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.Unauthorized, "Missing 'Authorization' header. Access denied.");
            return;
        }

        //your OAuth startup class may be called something else...
        ticket = Startup.OAuthOptions.AccessTokenFormat.Unprotect(token);

        if (ticket == null)
        {
            actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.BadRequest, "Invalid token decrypted.");
            return;
        }

        // you could perform some logic on the ticket here...

        // you will be able to retrieve the ticket in all controllers by querying properties and looking for "Ticket"... 
        actionContext.Request.Properties.Add(new KeyValuePair<string, object>("Ticket", ticket));
        base.OnAuthorization(actionContext);
    }
}

谢谢你，弗朗西斯·杜查姆

Answer 1

您可以在 OAuth 启动类的 GrantResourceOwnerCredentials 中将其添加到字典中。

ticket.Properties.Dictionary.Add(KeyValuePair<string, string>("UserID", user.Id.ToString())); //the user object from your authentication logic...

然后实现一个 AuthorizeAttribute，您可以在其中检索在请求的 Authorize header 中发送的 token ，取消保护并将其添加到请求属性中然后在所有 Controller 的方法中可用。

public class AuthFilter : AuthorizeAttribute
{
    private void AuthorizeRequest(HttpActionContext actionContext)
    {
        string token = string.Empty;
        AuthenticationTicket ticket;

        token = (actionContext.Request.Headers.Any(x => x.Key == "Authorization")) ? actionContext.Request.Headers.Where(x => x.Key == "Authorization").FirstOrDefault().Value.SingleOrDefault().Replace("Bearer ", "") : "";

        if (token == string.Empty)
        {
            actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.Unauthorized, "Missing 'Authorization' header. Access denied.");
            return;
        }

        //your OAuth startup class may be called something else...
        ticket = Startup.OAuthBearerOptions.AccessTokenFormat.Unprotect(token);

        if (ticket == null)
        {
            actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.BadRequest, "Invalid token decrypted.");
            return;
        }

        // you could perform some logic on the ticket here...

        // you will be able to retrieve the ticket in all controllers by querying properties and looking for "Ticket"... 
        actionContext.Request.Properties.Add(new KeyValuePair<string, object>("Ticket", ticket));
    }
}

然后在您的网络方法中，Request.Properties 将包含 Ticket，它本身有一个包含 UserID 的字典。

您需要在WebApiConfig.cs中注册AuthorizeAttribute

config.Filters.Add(new AuthFilter());
// I also have this in my Web API config. Not sure if I had to add this manually or the default project had these lines already...
config.SuppressDefaultHostAuthentication();
config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));