.net core 5 中的 Swagger 给我错误--No authenticationScheme is specified, and there is no DefaultChallengeScheme found答案

【问题标题】：Swagger in .net core 5 give me the error --No authenticationScheme was specified, and there was no DefaultChallengeScheme found.net core 5 中的 Swagger 给我错误--No authenticationScheme is specified, and there is no DefaultChallengeScheme found
【发布时间】：2021-08-28 00:32:13
【问题描述】：

当我从 Swagger UI 请求任何 API 端点时，给我以下错误

System.InvalidOperationException: 没有 authenticationScheme 指定，并且没有找到 DefaultChallengeScheme。默认可以使用 AddAuthentication(string defaultScheme) 或 AddAuthentication(Action 配置选项）。

在 Microsoft.AspNetCore.Authentication.AuthenticationService.ChallengeAsync（HttpContext 上下文、字符串方案、AuthenticationProperties 属性）

在 Microsoft.AspNetCore.Authorization.Policy.AuthorizationMiddlewareResultHandler.HandleAsync（RequestDelegate 接下来，HttpContext 上下文，AuthorizationPolicy 策略， PolicyAuthorizationResult authorizeResult)

在 Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext 上下文）

在 Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext 上下文）

在 Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)

在 Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)

在 Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext 上下文）

标题

=======

接受：/

接受编码：gzip、deflate

接受语言：en-US,en;q=0.5

授权：不记名 eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJVc2VySWQiOiIzIiwiTG9naW5JZCI6ImFkbWluIiwiVXNlclR5cGVJZCI6IjEiLCJFbWFpbCI6ImEiLCJNb2JpbGUiOiJhIiwianRpIjoiMWU1MDY3ODAtMWRjNS00MDYzLWFkMTktMDdlMjg4MzAxOWVjIiwiZXhwIjoxNjIzNDYzNjQ4LCJpc3MiOiJlZHVjYXJlLmNvbSIsImF1ZCI6ImVkdWNhcmUuY29tIn0.G2-D_oIdwUDw_3iz87jxWBIMabFpLlR5ASjCr109kNM P>

连接：保持活动

主机：本地主机：21068

引用者：http://localhost:21068/swagger/index.html

下面给出了 Swagger 的配置

public void ConfigureServices(IServiceCollection services)
        {
services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo { Title = "Edu Care API", Version = "v1" });

                c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
                {
                    Description = "Please insert the authorization token into field",
                    Name = "Authorization",
                    BearerFormat = "JWT",
                    In = ParameterLocation.Header,
                    Type = SecuritySchemeType.Http,
                    Scheme = "bearer"
                });
                c.AddSecurityRequirement(new OpenApiSecurityRequirement {
                {
                    new OpenApiSecurityScheme
                    {
                    Reference = new OpenApiReference
                    {
                        Type = ReferenceType.SecurityScheme,
                        Id = "Bearer"
                    }
                    },
                    new string[] { }
                }
                });

            });
        }


 public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {

            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "Edu Care API v1");
                //c.RoutePrefix = string.Empty;
            });

app.UseRouting();
            app.UseAuthentication();
            app.UseAuthorization();           

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.MapRazorPages();
            });

}

我的基本控制器如下

 [Authorize]
    [ApiController]
    [Route("api/[controller]")]
    public class BaseController : ControllerBase
    {

    }

我的 API 端点如下

[Route("api/[controller]")]
    [ApiController]    
    public class AcademicFeeConfigurationController : BaseController
    {

 [HttpGet]
        [Route("[action]")]
        public IActionResult GetFeeRelatedAllSli()
        {
            try
            {
                object sli = new
                {
                    FeeTypeSli = new FeeTypeService(context).FeeTypeSli(),
                    ClassInfoSli = new ClassInfoService(context).ClassInfoSli(),
                    SectionSli = new SectionInfoService(context).SectionInfoSli(),
                    AcademicSessionSli = new AcademicSessionInfoService(context).AcademicSessionSli(),
                };

                return Ok(sli);
            }
            catch (Exception ex)
            {
               
                ResponseModel.Notification = UtilityHelper.CreateNotification(Helpers.ExceptionMessage(ex), Enums.NotificationType.Error);
                return StatusCode(500, ResponseModel);
            }
        }
}

也许缺少一些东西。任何人都可以提供任何建议/解决方案

【问题讨论】：

startup.cs ConfigureServices 方法中是否有任何身份验证设置？看来您没有设置任何身份验证 sechma 并在 api 控制器中使用 Authorize。

标签： asp.net-core .net-core swagger swashbuckle.aspnetcore

【解决方案1】：

这与 Swagger 无关，您的代码缺少 AddAuthentication()。下面的示例注册身份验证方案（JWT 和 Cookie），同时使用 JWT 作为默认方案。更多信息在Docuementation。

services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
.AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, options => Configuration.Bind("JwtSettings", options))
.AddCookie(CookieAuthenticationDefaults.AuthenticationScheme, options => Configuration.Bind("CookieSettings", options));

【讨论】：