Question

如果会话已过期，我将使用ActionFilterAttribute将用户路由到登录视图，如下所示。

现在，我想保留原始请求中的路线数据，以便我可以在登录后将用户路由回到该视图。

如何将原始路线数据发送到Login操作方法？

public class BaseController : Controller
{
    public int? BranchId {get => HttpContext.Session.GetInt32("BranchId") as int?;}
    public string Admin {get => HttpContext.Session.GetString("Admin") as string;}

    public BaseController() {}
}

public class AdminOrBranchesAccessAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext context)
    {
        base.OnActionExecuting(context);

        if ((context.Controller as BaseController).Admin == null &&
            (context.Controller as BaseController).BranchId == null)
        {
            context.Result = new RedirectToRouteResult(new RouteValueDictionary(new
            {
                controller = "Home",
                action = "Login"
            }));
        }
    }
}

[AdminOrBranchesAccess]
public async Task<IActionResult> Details(int? id)
{
    // Some stuff going on
    return View();
}

Answer 1

要成功登录后重新定向到上一个操作，您需要提供登录操作的返回URL，并将其值设置在OnActionExecuting中。

使用参数Login更改如下的returnUrl方法

[HttpGet]
[AllowAnonymous]
public async Task<IActionResult> Login(string returnUrl = null)
{
    // Clear the existing external cookie to ensure a clean login process
    await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);

    ViewData["ReturnUrl"] = returnUrl;
    return View();
}

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Login(LoginViewModel model, string returnUrl = null)
{
    ViewData["ReturnUrl"] = returnUrl;
    if (ModelState.IsValid)
    {
        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, set lockoutOnFailure: true
        var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, lockoutOnFailure: true);
        if (result.Succeeded)
        {
            _logger.LogInformation("User logged in.");
            return RedirectToLocal(returnUrl);
        }
        if (result.RequiresTwoFactor)
        {
            return RedirectToAction(nameof(LoginWith2fa), new { returnUrl, model.RememberMe });
        }
        if (result.IsLockedOut)
        {
            _logger.LogWarning("User account locked out.");
            return RedirectToAction(nameof(Lockout));
        }
        else
        {
            ModelState.AddModelError(string.Empty, "Invalid login attempt.");
            return View(model);
        }
    }

    // If we got this far, something failed, redisplay form
    return View(model);
}

AdminOrBranchesAccessAttribute

public class AdminOrBranchesAccessAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext context)
    {
        base.OnActionExecuting(context);

        if ((context.Controller as BaseController).Admin == null &&
            (context.Controller as BaseController).BranchId == null)
        {
            context.Result = new RedirectToRouteResult(new RouteValueDictionary(new
            {
                controller = "Home",
                action = "Login",
                returnUrl = context.HttpContext.Request.Path
            }));
        }
    }
}

如何将路线数据从ActionFilterAttribute传递到操作方法？

1 个答案: