部署到Plesk的ASP.NET Core Identity应用登录后5-10秒自动登出问题求助

大家好，我遇到了一个特别奇怪的问题！这个问题原本出现在我的主项目里，为了复现它我特意做了个简化版的小应用，现在所有示例都来自这个小应用——因为它和主项目的问题完全一致。

我用.NET 6.0开发ASP.NET Core Web应用，创建项目时勾选了Individual Accounts和HTTPS选项，用的是ASP.NET Core Identity默认的认证配置，没加额外自定义。之后我加了Controllers文件夹，里面建了HomeController，包含Index和CreateStudent两个Action方法（就是个示例功能）。

现在问题来了：每次登录后，最多过5-10秒，只要我操作任何功能就会被踢下线，不得不反复登录。本地开发时完全没这问题，可一编译部署到Plesk主机上就出现了这个诡异的情况。我自己完全摸不着头脑，网上搜了一圈也没找到可行的解决办法，想问问大家有没有思路？谢谢啦！

我的Program.cs代码 #

using Microsoft.AspNetCore.DataProtection;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using WebApplication1.Data;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddDefaultIdentity<IdentityUser>(options => {
    options.SignIn.RequireConfirmedAccount = true;
    // Diğer Identity ayarları
})
    .AddEntityFrameworkStores<ApplicationDbContext>();

builder.Services.ConfigureApplicationCookie(options => {
    options.ExpireTimeSpan = TimeSpan.FromMinutes(30);
    options.SlidingExpiration = true;
    options.Cookie.HttpOnly = true;
    options.Cookie.SecurePolicy = CookieSecurePolicy.Always;
    options.LoginPath = "/Identity/Account/Login";
    options.AccessDeniedPath = "/Identity/Account/AccessDenied";
});

builder.Services.AddRazorPages();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();

app.MapRazorPages();

app.MapControllerRoute(
    name: "specific",
    pattern: "Home/Index",
    defaults: new { controller = "Home", action = "Index" });

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.Run();

我的HomeController代码 #

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.DotNet.Scaffolding.Shared.CodeModifier.CodeChange;
using WebApplication1.Data;
using WebApplication1.Models;

namespace WebApplication1.Controllers
{
    [Authorize]
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        private readonly UserManager<IdentityUser> _userManager;
        private readonly SignInManager<IdentityUser> _signInManager;
        private readonly ApplicationDbContext _context;

        public HomeController(ILogger<HomeController> logger, UserManager<IdentityUser> userManager, ApplicationDbContext context, SignInManager<IdentityUser> signInManager)
        {
            _userManager = userManager;
            _logger = logger;
            _context = context;
            _signInManager = signInManager;
        }

        public IActionResult Index()
        {
            var students = _context.Students.ToList();
            return View(students);
        }

        public IActionResult CreateStudent()
        {
            return View();
        }

        [HttpPost]
        public IActionResult CreateStudent(Student model)
        {
            Student student = new Student
            {
                Name = model.Name,
                Surname = model.Surname,
                Department = model.Department
            };
            _context.Students.Add(student);
            _context.SaveChanges();
            return RedirectToAction("Index","Home");
        }
    }
}

补充说明（文件结构与路由） #

• 我的文件结构中，Identity相关的登录页等路径是example.com/Identity/Account/Login这类，但登录后系统会重定向到example.com/，而不是自动跳转到example.com/Home/Index，我怀疑会不会是路由配置的问题导致了登出？

已尝试的解决方案 #

• 调整过ApplicationCookie的配置参数（比如过期时间、滑动过期、Cookie安全策略等），但没有任何改善，问题依然存在。

内容来源于stack exchange