使用OWIN对从水疗中心到Web API的用户进行身份验证时找不到TokenendPoint

我在使用从Angular JS Spa页面到Web API的代币机制对用户进行身份验证时面临困难。

我不想使用ASP.NET身份默认表来添加或身份验证用户。我有自己的数据库和一张名为" lomoseeeaccess"表的表，其中包含applyEnumber作为用户ID和密码。我想根据该表中的值对用户进行身份验证，然后要授予令牌，以便他们获得后续呼叫的授权。我已经使用了所有必需的OWIN和ASP.NET参考来实现结果。

请参阅下面的相关代码： -

startup.cs

[assembly: OwinStartup(typeof(Application.WebAPI.Startup))]
namespace Application.WebAPI
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=316888
            app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
            var myProvider = new AuthorizationServerProvider();
            OAuthAuthorizationServerOptions options = new OAuthAuthorizationServerOptions
            {
                AllowInsecureHttp = true,
                TokenEndpointPath = new PathString("/Token"),
                AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
                Provider = myProvider
            };
            app.UseOAuthAuthorizationServer(options);
        }
    }
}

oturizationserverprovider.cs

public class AuthorizationServerProvider : OAuthAuthorizationServerProvider
    {
        public override async Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
        {
            context.Validated(); // 
        }
        public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            context.OwinContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { "*" });
            string userId = context.UserName;
            string password = context.Password;
            EmployeeAccessBLL chkEmpAccessBLL = new EmployeeAccessBLL();
            EmployeeAccessViewModel vmEmployeeAccess = chkEmpAccessBLL.CheckEmployeeAccess(Convert.ToInt32(userId), password);
            if(vmEmployeeAccess != null)
            {
                var identity = new ClaimsIdentity(context.Options.AuthenticationType);
                identity.AddClaim(new Claim("username", vmEmployeeAccess.EmpName));
                context.Validated(identity);
            }
            else
            {
                context.SetError("invalid_grant", "Provided username and password is incorrect");
                return;
            }
        }
    }

webapiconfig.cs

public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {            
            // Web API routes
            config.MapHttpAttributeRoutes();
            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
            config.Formatters.JsonFormatter.SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));
            config.Formatters.Remove(config.Formatters.XmlFormatter);
            var cors = new EnableCorsAttribute("*", "*", "*");
            config.EnableCors(cors);
        }
    }

login.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0/angular.min.js"></script>
    <script src="../Scripts/AngularControllers/LoginController.js"></script>
    <script src="../Scripts/AngularServices/ApiCallService.js"></script>
</head>
<body ng-app="appHome">
    <div ng-controller="ctrlLogin">
        <label>Employee Number</label>
        <input type="text" id="txtEmpNumber" ng-model="md_empnumber" />
        <br/>
        <br/>
        <label>Password</label>
        <input type="text" id="txtEmpNumber" ng-model="md_password"  />
        <button id="btnAdd" type="submit" ng-click="Login()">Login</button>
    </div>
</body>
</html>

logincontroller.js

var myApp = angular.module('appHome', []);
myApp.controller("ctrlLogin", ['$scope', 'MetadataOrgFactory', '$location', function ($scope, MetadataOrgFactory, $location) {
    $scope.Login = function () {
        var objLogin = {
            'username' : $scope.md_empnumber,
            'password' : $scope.md_password,
            'grant_type' : 'password'
        };
        MetadataOrgFactory.postLoginCall('Token', objLogin, function (dataSuccess) {
            alert("Welcome " + dataSuccess);           
        }, function (dataError) {
        });
    }
}]);

apicallservice.js

var appService = angular.module('appHome');
appService.factory('MetadataOrgFactory', ['$http', function ($http) {
    var url = 'http://localhost:60544';
    var dataFactory = {};
    dataFactory.postLoginCall = function (controllerName, objData, callbackSuccess, callbackError) {
        $http.post(url + '/' + controllerName, objData).then
            (function success(response) {
                alert("Success");
                callbackSuccess(response.data);
            }, function error(response) {
                callbackError(response.status);
            });
    };
    return dataFactory;
}])

单击登录按钮时，我会遇到以下两个错误： -

选项http：//localhost：60544/token 404(找不到(
xmlhttprequest不能加载http：//localhost：60544/token。响应前飞行请求不通过访问控制检查：否请求的"访问控制"标头资源。因此不允许来源'http：//localhost：60512' 使用权。响应具有HTTP状态代码404。

我搜索了很多帖子，但是没有一篇帖子符合我的标准，因此想到了发布我的查询。请帮助我。

错误是选项调用的结果。

HTTP选项方法用于描述通信选项对于目标资源。客户可以为选项方法或参考整个服务器的星号(*(。

由于您不处理这些，因此您会看到404(找不到(。您可以在此处阅读有关CORS的信息：https：//developer.mozilla.org/en-us/docs/web/http/access_control_cors

实现此目的的一种方法是添加global.asax以下代码：

public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        GlobalConfiguration.Configure(WebApiConfig.Register);
    }
    protected void Application_BeginRequest()
    {
        if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
        {
            // Cache the options request.
            HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", HttpContext.Current.Request.Headers["Origin"]);
            HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "GET, PUT, DELETE, POST, OPTIONS");
            HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Accept, Authorization");
            HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", "1728000");
            HttpContext.Current.Response.End();
        }
    }
}

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