bearer token不能与我的Authorize Attribute Roles一起使用WebAPI，Username为null

Question

• 我可以登录并通过Postman
从http://localhost:58507/token获取令牌密钥
• 我可以用[授权]属性
调用api
• 但是当我设置角色[授权（角色=＆＃34;管理员＆＃34;）]时，我得到此服务器内部错误：

  

＆＃34;消息＆＃34;：＆＃34;发生了错误。＆＃34;，

     

＆＃34; ExceptionMessage＆＃34;：＆＃34;值不能为空。参数名称：username＆＃34;，

     

＆＃34; ExceptionType＆＃34;：＆＃34; System.ArgumentNullException＆＃34;，

     

＆＃34; StackTrace＆＃34;：＆＃34;在System.Web.Util.SecUtility.CheckParameter（String＆amp; param，Boolean checkForNull，Boolean checkIfEmpty，Boolean checkForCommas，Int32 maxSize，String paramName）

这是我的代码：

• AuthorizeAttribute类：

public class AuthorizeAttribute : System.Web.Http.AuthorizeAttribute
    {
        protected override void HandleUnauthorizedRequest(HttpActionContext actionContext)
        {
            if (!HttpContext.Current.User.Identity.IsAuthenticated)
                base.HandleUnauthorizedRequest(actionContext);
            else
                actionContext.Response = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.Forbidden);
        }
    }

• OAuthAuthorizationServerProvider类：

public class MyOAuthProvider : OAuthAuthorizationServerProvider
{
    public override async Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
    {
        context.Validated();
    }

    public override async Task GrantResourceOwnerCredentials(
        OAuthGrantResourceOwnerCredentialsContext context)
    {
        var identity = new ClaimsIdentity(context.Options.AuthenticationType);
        string username = context.UserName;
        string password = context.Password;
        if (Membership.ValidateUser(username, password))
        {
            using (var ee = new DBEntities())
            {
                MembershipUser mu = Membership.GetUser(username);
                Guid guid = (Guid)mu.ProviderUserKey;
                string roles = string.Join(",", Roles.GetRolesForUser(username));
                identity.AddClaim(new Claim(ClaimTypes.Role, roles));
                identity.AddClaim(new Claim("username", username));
                context.Validated(identity);
            }
        }
        else
        {
            context.SetError("Login Field", "Error username or password");
        }
    }
}

Answer 1

我找到了解决方案：post 问题出在这一行

identity.AddClaim(new Claim("username", username));

我改变了＃34;用户名＆＃34;到ClaimTypes.Name

identity.AddClaim(new Claim(ClaimTypes.Name, username));