小编Gal*_*ina的帖子

我有一个net core 2.0应用程序和授权问题.我想使用具有特殊request.header和标准默认身份验证的自定义授权.首先,我在startup.cs中添加配置:

public IServiceProvider ConfigureServices(IServiceCollection services)
{
  ...
services.AddAuthorization(options =>
            {
                options.AddPolicy(DefaultAuthorizedPolicy, policy =>
                {
                    policy.Requirements.Add(new TokenAuthRequirement());
                });
            });
services.AddSingleton<IAuthorizationHandler, AuthTokenPolicy>();
  ...
}

和AuthTokenPolicy.cs

public class AuthTokenPolicy : AuthorizationHandler<TokenAuthRequirement>
{   
    protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, TokenAuthRequirement requirement)
    {
        var filterContext = context.Resource as AuthorizationFilterContext;
        var response = filterContext.HttpContext.Response;
        try
        {
            // some validation code

            var isValidToken = isValidTokenTask.Result;
            if (!isValidToken)
            {
                response.StatusCode = 401;
                return Task.CompletedTask;
            }

            response.StatusCode = 200;
            context.Succeed(requirement);
        }
        catch (Exception)
        {
            return Task.CompletedTask;
        }
        return …

我这里有一个 json https://api.nasa.gov/insight_weather/?api_key=DEMO_KEY&feedtype=json&ver=1.0，如下所示：

{
  "782": {
    "First_UTC": "2021-02-06T17:08:11Z",
    "Last_UTC": "2021-02-07T17:47:46Z",
    "Month_ordinal": 12,
    "Northern_season": "late winter",
    "PRE": {
      "av": 721.77,
      "ct": 113450,
      "mn": 698.8193,
      "mx": 742.2686
    },
    "Season": "winter",
    "Southern_season": "late summer",
    "WD": {
      "most_common": null
    }
  },
  "783": {
    "First_UTC": "2021-02-07T17:47:46Z",
    "Last_UTC": "2021-02-08T18:27:22Z",
    "Month_ordinal": 12,
    "Northern_season": "late winter",
    "PRE": {
      "av": 722.186,
      "ct": 107270,
      "mn": 698.7664,
      "mx": 743.1983
    },
    "Season": "winter",
    "Southern_season": "late summer",
    "WD": {
      "most_common": null
    }
  },
  "sol_keys": [ "782", "783" ],
  "validity_checks": { /* Some …

有一个代码：

<select name="department" class="form-control select" [(ngModel)]="departments" formControlName="departmentControl">    
    <option *ngFor="let department of departments" [ngValue]="department" [selected]="department.id == this.departmentid">
      {{ department.name }}
    </option>
  </select>

和功能：

isSelected(department): boolean {
  debugger;
  return department.id == this.departmentid;
}

部门-是用户详细信息组件的嵌套组件。首次选择用户详细信息组件后，未选择部门。但是第二次一切正常。哪里有错？

是否有任何函数（如fold, map, filter），它获取 2 个数组和 lambda 函数（例如乘法）作为参数并返回第三个数组？

我用过循环，但是有更漂亮的方法吗？