.net core從版本 3.0 遷移到 3.1引發的BUG

前幾天微軟的.net core3.1發布后，隨把visual studio 2019升級到16.4.1版本並把項目進行框架升級。升級后的項目在IdentityServer4授權后在360安全瀏覽器竟然無法跳回，測試了demo給的EntityFramework項目，亦是如此，記錄日志如下：

解決方案如下：

在 Startup.cs 中，添加以下代碼 ：

private void CheckSameSite(HttpContext httpContext, CookieOptions options)
{
    if (options.SameSite == SameSiteMode.None) 
    { 
        var userAgent = httpContext.Request.Headers["User-Agent"].ToString();
        // TODO: Use your User Agent library of choice here. 
        if (/* UserAgent doesn't support new behavior */) 
        { 
            options.SameSite = SameSiteMode.Unspecified;
        }
    }
}

public void ConfigureServices(IServiceCollection services) 
{ 
    services.Configure<CookiePolicyOptions>(options => 
    { 
        options.MinimumSameSitePolicy = SameSiteMode.Unspecified;
        options.OnAppendCookie = cookieContext =>
            CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
        options.OnDeleteCookie = cookieContext =>
            CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
    }); 
} 

public void Configure(IApplicationBuilder app) 
{ 
    // Before UseAuthentication or anything else that writes cookies.
    app.UseCookiePolicy();

    app.UseAuthentication(); 
    // code omitted for brevity
}

“選擇退出”開關

通過 Microsoft.AspNetCore.SuppressSameSiteNone 兼容性開關，可暫時選擇退出新的 ASP.NET Core Cookie 行為。 將以下 JSON 添加到項目的 runtimeconfig.template.json 文件中 ：

{ 
  "configProperties": { 
    "Microsoft.AspNetCore.SuppressSameSiteNone": "true" 
  } 
}

相關文檔：https://docs.microsoft.com/zh-cn/dotnet/core/compatibility/3.0-3.1#support-older-browsers