Question

我正在尝试为路线创建约束。基于从Db检索的访问信息，我将选择要选择的路线。我已经创建了继承IRouteConstraint并调用存储库的控制器，但是无法从httpclient调用中获取结果。

我的routeConfig的代码段

routes.MapRoute(
                 name: "Home",
                 url: "{*routelink}",
                 defaults: new { controller = "Home", action = "Index" },
                 constraints: new { routelink = new UserAccessController("Home") }
             );
            routes.MapRoute(
                 name: "Reports",
                 url: "{*routelink}",
                 defaults: new { controller = "Reports", action = "Index" },
                 constraints: new { routelink = new UserAccessController("Reports") }
              );

Constarint的代码段

 public class UserAccessController : IRouteConstraint
{
    // GET: UserAccess
    private readonly string _controller;
    public UserAccessController(string Controller)
    {
        _controller = Controller;
    }

    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        bool _authorized = false;
        var userAccessDetails = GetUserRoleDetails();
        switch (_controller)
        {
            case "Home":
                {
                    _authorized = Convert.ToBoolean(userAccessDetails.CanAccessHome);
                    return _authorized;
                }
            case "Reports":
                {
                    _authorized = Convert.ToBoolean(userAccessDetails.Result.CanAccessReports);
                    return _authorized;
                }

        }
        return _authorized;
    }

    public async Task<UserRole> GetUserRoleDetails()
    {
        IRepository _repository = new Repository();
        var userRoleDetails = new UserRole();
        var currentUser = await _repository.GetCurrentUser(Path.GetFileName(HttpContext.Current.User.Identity.Name.ToUpper()));
        if (currentUser != null)
        {
            var roles = await _repository.GetUserRoles();
            userRoleDetails = roles.Where(r => r.RoleId == currentUser.RoleId).FirstOrDefault();

        }
        return userRoleDetails;
    }
}

存储库正在调用httpwrapper类以从httpclient获取结果。

 public static async Task<IEnumerable<T>> GetAsync(IEnumerable<T> t, string path)
    {
        HttpResponseMessage response;
        response = await client.GetAsync(path);
                    
        if (response.IsSuccessStatusCode)
        {
            t = await response.Content.ReadAsAsync<IEnumerable<T>>();
        }
        return t;
    }

不确定是什么问题，未获得结果 response = await client.GetAsync(path);。

从Global.asax中的Session_Start事件中调用时，我可以使用相同的api和参数获得结果。请让我知道问题出在哪里，以及如何从http中检索结果。

Answer 1

我通过保留路由配置来解决此问题。创建了一个新的动作过滤器，并根据访问权限重新路由了该网址。将此过滤器放在默认路由的顶部。

 public class StartupFilter:ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var userAccessDetails = HttpContext.Current.Session["Role"] as UserRole;

            if (userAccessDetails.HasAccessHome)
            {
                filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(
                           new
                           {
                               controller = "Home",
                               action = "Index"
                           }));

            }
            else if (userAccessDetails.HasAccessReport))
            {
              filterContext.Result = new RedirectToRouteResult(new 
                  RouteValueDictionary(
                          new
                          {
                              controller = "Reports",
                              action = "Index"
                          }));

            }
         base.OnActionExecuting(filterContext);
    }
}

无法在控制器中获取webApi结果

1 个答案: