asp.net-core – 为什么我的JWT承载认证在令牌表示5分钟后将令牌

options.TokenEndpointPath = "/api/token";
        options.AllowInsecureHttp = true;
        options.AccessTokenHandler = new JwtSecurityTokenHandler();
        options.SigningCredentials.Add(new SigningCredentials(signingKey,SecurityAlgorithms.HmacSha256));
        options.AccessTokenLifetime = TimeSpan.FromSeconds(30);
        options.AuthorizationCodeLifetime = TimeSpan.FromSeconds(30);

返回的令牌包含：

"expires_in": 30,

并且反序列化的令牌包含以下声明：

"nbf": 1476915220,"exp": 1476915250,"iat": 1476915220,

如您所见,exp(过期时间)是在iat(发布时间)之后30秒.然而,令牌在到期后5分钟才触发401 Unauthorized.如果我们将exp编号插入http://www.epochconverter.com/,那么我们将看到这个评估结果为2016年10月19日星期三格林尼治标准时间22:14:10,当地时间是下午5:14:10.

以下是Core库的一些记录输出：

Microsoft.IdentityModel.Tokens.SecurityTokenExpiredException: IDX10223: Lifetime validation failed. The token is expired.
ValidTo: '10/19/2016 22:14:10'
Current time: '10/19/2016 22:19:10'.
   at Microsoft.IdentityModel.Tokens.Validators.ValidateLifetime(Nullable`1 notBefore,Nullable`1 expires,SecurityToken securityToken,TokenValidationParameters validationParameters)
   at System.IdentityModel.Tokens.Jwt.JwtSecurityTokenHandler.ValidateLifetime(Nullable`1 notBefore,JwtSecurityToken securityToken,TokenValidationParameters validationParameters)
   at System.IdentityModel.Tokens.Jwt.JwtSecurityTokenHandler.ValidateToken(String token,TokenValidationParameters validationParameters,SecurityToken& validatedToken)
   at Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler.<HandleAuthenticateAsync>d__1.MoveNext()
info: Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerMiddleware[7]
      Bearer was not authenticated. Failure message: IDX10223: Lifetime validation failed. The token is expired.
ValidTo: '10/19/2016 22:14:10'
Current time: '10/19/2016 22:19:10'.

当然,此输出并不能证明服务器在22:14:10和22:19:10之间接受令牌.如果我碰巧在它过期后等了5分钟然后尝试验证令牌,那就是它本来会做的,但是你必须接受我的话.我在Postman测试并且每秒点击“发送”直到它返回401.

那么这是什么一回事？是否有一些我不知道的内置缓冲区？有趣的是,AccessTokenLifetime的默认值是5分钟,但令牌肯定反映我已将其更改为30秒.这是怎么回事？

我正在使用的相关库：

<package id="AspNet.Security.OpenIdConnect.Extensions" version="1.0.0-beta6-final" targetFramework="net452" />
<package id="AspNet.Security.OpenIdConnect.Server" version="1.0.0-beta6-final" targetFramework="net452" />
<package id="Microsoft.AspNetCore.Authentication.JwtBearer" version="1.0.0" targetFramework="net452" />