核心 3.1 中的 oauth2

如何解决核心 3.1 中的 oauth2

我正在使用核心 3.1 连接到画布 API，这是我代码的一部分..

 services.AddAuthentication(config =>
            {
                config.DefaultAuthenticateScheme = "CanvasCookies";
                config.DefaultSignInScheme = "CanvasCookies";
                config.DefaultChallengeScheme = "CanvasLMS";
            })
                .AddCookie("CanvasCookies")
                .AddOAuth("CanvasLMS",config => 
                {
                    var canvas_domain = Configuration.GetValue<string>("Canvas:Domain");
                    var client_secret = Configuration.GetValue<string>("Canvas:Secret");
                    var client_id = Configuration.GetValue<string>("Canvas:Client_id");

                    config.ClientId = client_id;
                    config.ClientSecret = client_secret;
                    
                    config.CallbackPath = new PathString("/oauth/callback");
                    //config.Scope.Add("google.com")


                    config.AuthorizationEndpoint = $"{canvas_domain}login/oauth2/auth";
                    config.TokenEndpoint = $"{canvas_domain}login/oauth2/token";
                    config.UserinformationEndpoint = $"{canvas_domain}api/v1/users//courses";

                    config.Savetokens = true;
         

                    config.Events = new OAuthEvents()
                    {
                        OnCreatingTicket = context =>
                        {
                            var accesstoken = context.Accesstoken;
                            var base64payload = accesstoken.Split('.')[1];
                            var bytes = Convert.FromBase64String(base64payload);
                            var jsonPayload = Encoding.UTF8.GetString(bytes);
                            var claims = JsonConvert.DeserializeObject<Dictionary<string,string>>(jsonPayload);

                            foreach(var claim in claims)
                            {
                                context.Identity.AddClaim(new Claim(claim.Key,claim.Value));
                            }

                            return Task.CompletedTask;
                        }

这是控制器

 public class APICanvasController : Controller
    {

...
        [Authorize]
        public async Task<IActionResult> Secret()
        {
            var serverResponse = await AccesstokenRefreshWrapper(
                        () => SecuredGetRequest("https://localhost:44388/secret/index"));

            var apiResponse = await AccesstokenRefreshWrapper(
                () => SecuredGetRequest("https://localhost:44388/secret/index"));

            return View();
        }

        private async Task<HttpResponseMessage> SecuredGetRequest(string url)
        {
            var token = await HttpContext.GetTokenAsync("access_token");
            var client = _httpClientFactory.CreateClient();
            client.DefaultRequestHeaders.Add("Authorization",$"Bearer {token}");
            return await client.GetAsync(url);
        }

        public async Task<HttpResponseMessage> AccesstokenRefreshWrapper(
        Func<Task<HttpResponseMessage>> initialRequest)
        {
            var response = await initialRequest();

            if (response.StatusCode == System.Net.HttpStatusCode.Unauthorized)
            {
                await RefreshAccesstoken();
                response = await initialRequest();
            }

            return response;
        }

        private async Task RefreshAccesstoken()
        {
          ...
        }
    }
}

当我执行代码时出现此错误

异常：oauth 状态丢失或无效。 未知位置

异常：处理远程登录时遇到错误。 Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler.HandleRequestAsync()

知道我做错了什么吗？

谢谢

解决方法

CallbackPath 不应指代控制器，它指代由 auth 中间件处理的唯一路径。完成后，它将重定向回您的控制器。

"/oauth/callback" 应该将 oauth 认证结果作为 json 而不是页面处理。