响应中的JWT令牌在响应头上提供www-authenticate→Bearer

我正在尝试验证JWT令牌和请求标头传递承载令牌 . Headers 仅作为www-authenticate→Bearer给出响应 . 没有与发行人或其他任何相关的其他错误 . 除此之外，它响应401，因为它没有验证令牌 . 由于缺少 Headers 信息，我无法得到与此错误有关的错误 .

这是我的 Startup.cs 配置

services.AddAuthentication(options =>
{
    options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
    options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
}).AddJwtBearer(jwtBearerOptions =>
{
    jwtBearerOptions.TokenValidationParameters = new TokenValidationParameters()
    {
        ValidateIssuer = true,
        ValidateActor = false,
        ValidateAudience = false,
        ValidateLifetime = true,
        ValidateIssuerSigningKey = true,

        ValidIssuer = Configuration["JwtIssuer"],
        ValidAudience = Configuration["JwtExpireDays"],
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes
                                           (Configuration["JwtKey"]))
    };
});

var policy = new AuthorizationPolicyBuilder()
   .RequireAuthenticatedUser()
   .Build();

services.AddMvc(config =>
{
    config.Filters.Add(new AuthorizeFilter(policy));
    //config.ModelBinderProviders.Insert(0, new BaseEntityModelBinderProvider());
})

令牌生成器 -

protected async Task<string> GenerateJwtToken(string email, IdentityUser user)
{
    var claims = new List<Claim>
    {
        new Claim(JwtRegisteredClaimNames.Sub, email),
        new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
        new Claim(ClaimTypes.NameIdentifier, user.Id)
    };

    var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_configuration["JwtKey"]));
    var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
    var expires = DateTime.Now.AddDays(Convert.ToDouble(_configuration["JwtExpireDays"]));

    var token = new JwtSecurityToken(
        _configuration["JwtIssuer"],
        _configuration["JwtIssuer"],
        claims,
        expires: expires,
        signingCredentials: creds
    );

    return new JwtSecurityTokenHandler().WriteToken(token);
}

在使用Bearer令牌请求客户端时，响应只是

请求 Headers

Authorization:Bearer <token>

响应标头 -

content-length →0
date →Thu, 08 Mar 2018 05:25:23 GMT
server →Kestrel
www-authenticate →Bearer

控制台信息 -

796ms
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 140.7756ms 401
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:50954/api/clinic application/json
info: Microsoft.AspNetCore.Authorization.DefaultAuthorizationService[2]
      Authorization failed for user: (null).
info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[3]
      Authorization failed for the request at filter 'Microsoft.AspNetCore.Mvc.Authorization.AuthorizeFilter'.
info: Microsoft.AspNetCore.Mvc.ChallengeResult[1]
      Executing ChallengeResult with authentication schemes ().
info: Microsoft.AspNetCore.Authentication.JwtBearer.JwtBearerHandler[12]
      AuthenticationScheme: Bearer was challenged.
info: Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker[2]
      Executed action eMedHat.SurveyPortal.Controllers.Api.ClinicApiController.GetClinics (eMedHat.SurveyPortal) in 73.5234ms
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 120.6734ms 401