我遵循了本教程：https ://medium.com/@st.mas29/microsoft-blazor-web-api-with-jwt-authentication-part-1-f33a44abab9d （適用于 .NET core 2.2）。這是我的啟動類 public class Startup { // This method gets called by the runtime. Use this method to add services to the container. // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940 public IConfiguration Configuration { get; } public Startup (IConfiguration configuration) { Configuration = configuration; } public void ConfigureServices(IServiceCollection services) { services.AddMvc().AddNewtonsoftJson(); //services.AddMvcCore().AddAuthorization().AddNewtonsoftJson(); services.AddAuthentication(options => { options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme; options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme; }) .AddJwtBearer(options => { options.TokenValidationParameters = new TokenValidationParameters { ValidateIssuer = true, ValidateAudience = true, ValidateLifetime = true, ValidateIssuerSigningKey = true, ValidIssuer = Configuration["Jwt:Issuer"], ValidAudience = Configuration["Jwt:Audience"], IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["Jwt:Key"])) }; }); services.AddResponseCompression(opts => { opts.MimeTypes = ResponseCompressionDefaults.MimeTypes.Concat( new[] { "application/octet-stream" }); }); }我還在 Api 控制器 SampleDataController 上添加了 [Authorize]。我預計（根據帖子）在訪問數據時會出現 401（未經授權）錯誤，但我收到有關缺少授權中間件的投訴
2 回答
吃雞游戲
TA貢獻1829條經驗 獲得超7個贊
將兩者 app.UseAuthentication()和app.UseAuthorization() 之后 app.UseRouting()
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(routes =>
{
routes.MapDefaultControllerRoute();
});
冉冉說
TA貢獻1877條經驗 獲得超1個贊
如果您發送帶有授權令牌的請求，并且Startup.cs文件中未設置服務器授權，則 API 將返回錯誤消息<Called method> contains authorization metadata, but a middleware was not found that supports authorization...
解決方法是在Startup.cs文件中添加以下行，BETWEENapp.UseRouting()和app.UseEndpoints(...)：
app.UseRouting();
//AUTHORIZING
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapRazorPages();
endpoints.MapControllers();
endpoints.MapFallbackToFile("index.html");
});
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