Question

好的，我已经为我的dot net core API添加了CORS策略，但不知何故，这些CORS策略不适用于身份服务器4端点。在我尝试注册用户时，我有以下api：

    [EnableCors("AllowAllCorsPolicy")]
    [Route("api/User")]
    public class UserController : Controller
    {
        private readonly UserManager<ApplicationUser> _userManager;
        private IUserServices _userService;
        public UserController(UserManager<ApplicationUser> userManager, IUserServices userService)
        {
            _userManager = userManager;
            _userService = userService;
        }

        [HttpPost]
        public async Task<int> Post([FromBody]User userInfo)
        {
            var user = new ApplicationUser{  UserName = userInfo.Name, Email = userInfo.Email,
                UserTypeId = Constant.User, CustomerId = userInfo.CustomerId };

            //Follwing 3 lines give CORS issue.
            await _userManager.AddToRoleAsync(user, Constant.User);
            var userClaim = new Claim(Constant.User, user.Email.ToString(), ClaimValueTypes.Integer);
            await _userManager.AddClaimAsync(user, userClaim);

            // var userObj = _userService.AddNewUser(userInfo);
        }

现在，如果我使用上述身份服务器方法（ AddToRoleAsync（）和 AddClaimAsync（）），我的客户端会出现CORS错误（在不同服务器上运行的角度应用程序）< / p>

但是，如果我使用自定义方法注册用户，我不会收到CORS错误：

            //Don't get CORS error when commented below
            //await _userManager.AddToRoleAsync(user, Constant.User);
            //var userClaim = new Claim(Constant.User, user.Email.ToString(), ClaimValueTypes.Integer);
            //await _userManager.AddClaimAsync(user, userClaim);

            //use custom method
            var userObj = _userService.AddNewUser(userInfo);

为asp.net启用CORS，我正在做startup.cs：

    public void ConfigureServices(IServiceCollection services)
            {
              services.AddCors(options =>
             {
                options.AddPolicy("AllowAllCorsPolicy",
                    builder => builder.AllowAnyOrigin()
                        .AllowAnyMethod()
                        .AllowAnyHeader()
                        .AllowCredentials());
            });
            services.AddMvc();
          }


public void Configure(IApplicationBuilder app, IHostingEnvironment env,  IServiceProvider serviceProvider)
        {
            app.UseCors("AllowAllCorsPolicy");
        }

我甚至尝试在startup.cs中手动添加CORS标头，但没有运气：

public void Configure(IApplicationBuilder app, IHostingEnvironment env,  IServiceProvider serviceProvider)
        {
            app.Use(async (context, next) =>
        {
            if (context.Request.Method == "OPTIONS")
                context.Response.StatusCode = (int)HttpStatusCode.OK;

            var headers = context.Response.Headers;
            if (headers.ContainsKey("Access-Control-Allow-Origin"))
            {
                headers["Access-Control-Allow-Origin"] = string.Join(",", context.Request.Headers["Referer"].Select(x => x.Substring(0, x.Length - 1)));
            }
            else
            {
                context.Response.Headers.Append("Access-Control-Allow-Origin", string.Join(",", context.Request.Headers["Referer"].Select(x => x.Substring(0, x.Length - 1))));
            }
            if (headers.ContainsKey("Access-Control-Allow-Headers"))
            {
                headers["Access-Control-Allow-Headers"] = "Origin, Content-Type, Accept, Client, Authorization, X-Auth-Token, X-Requested-With";
            }
            else
            {
                context.Response.Headers.Append("Access-Control-Allow-Headers", "Origin, Content-Type, Accept, Client, Authorization, X-Auth-Token, X-Requested-With");
            }
            if (headers.ContainsKey("Access-Control-Allow-Methods"))
            {
                headers["Access-Control-Allow-Credentials"] = "GET, POST, PATCH, PUT, DELETE, OPTIONS";
            }
            else
            {
                context.Response.Headers.Append("Access-Control-Allow-Methods", "GET, POST, PATCH, PUT, DELETE, OPTIONS");
            }
            if (headers.ContainsKey("Access-Control-Allow-Credentials"))
            {
                headers["Access-Control-Allow-Credentials"] = "true";
            }
            else
            {
                context.Response.Headers.Append("Access-Control-Allow-Credentials", "true");
            }
            context.Response.Headers.Append("Access-Control-Expose-Headers", "X-Auth-Token");
            context.Response.Headers.Append("Vary", "Origin");
            await next();
        });
        }

我看到了this documentation用于CORS的身份服务器选项以及this CORS文档，但没有多大帮助。

Answer 1

这适用于服务器的新版本。

    services.AddSingleton<ICorsPolicyService>((container) => {
        var logger = container.GetRequiredService<ILogger<DefaultCorsPolicyService>>();
        return new DefaultCorsPolicyService(logger)
        {
            AllowAll = true
        };
    });

在此讨论中有更多详细信息，这要归功于原始作者

https://github.com/IdentityServer/IdentityServer4/issues/4685

Answer 2

如果将IdentityServer 4与客户端一起使用以进行身份验证，则必须使用IdentityServer 4配置CORS，请参见：IdentityServer4CORS

IdentityServer4 CORS仅用于令牌端点。您所做的是为所有控制器/方法配置了CORS，这在您的情况下可能是正确的。但是，如果未在Identityserver4上启用CORS，则将无法检索令牌。

您可以将一列允许的CORS添加到您的客户端中，该列表将被添加到Identityserver数据库中，或者添加一个像这样的全局默认值：

var cors = new DefaultCorsPolicyService(_loggerFactory.CreateLogger<DefaultCorsPolicyService>())
{
    AllowedOrigins = { "https://foo", "https://bar" }
};
services.AddSingleton<ICorsPolicyService>(cors);

请注意，您也可以将其手动添加到数据库中。

无法在asp.net核心中为身份服务器4启用CORS

2 个答案: