Asp.Net Core 部署发布后EFCore数据库断连和Google浏览器无法存储Cookie

Asp.net Core 网站部署之后遇到一下问题。

1. 第一次打开网页登录时查询数据库操作断连。

2. 谷歌浏览器无法正常存储Cookie。

问题解决：

问题一：

前提条件：

Nuget包引用说明：Pomelo.EntityFrameworkCore.MySql

步骤：

将ConfigureServices方法中使用数据库断连重试机制。

//注册数据库连接
services.AddDbContext<ServerDBContext>(options => options.UseMySql(Configuration.GetConnectionString("DefaultConnection"),builder=> {
         builder.EnableRetryOnFailure();
}));

问题二：

据说原因：非Chrome80+浏览器不识别Cookie上的SameSite=none属性值,导致认证Cookie在后续请求中被抛弃。

步骤1:

在Configure方法中

// 表示ASP.NET Core 启动Cookie策略
app.UseCookiePolicy();

步骤2:

在ConfigureService中,添加cookie的策略配置代码；

services.Configure<CookiePolicyOptions>(options =>
{
        options.MinimumSameSitePolicy = (SameSiteMode)(-1);
        options.OnAppendCookie = cookieContext =>
            CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
        options.OnDeleteCookie = cookieContext =>
            CheckSameSite(cookieContext.Context, cookieContext.CookieOptions);
});

步骤3:

Startup类添加CheckSameSite方法

private void CheckSameSite(HttpContext httpContext, CookieOptions options)
{
    if (options.SameSite == SameSiteMode.None)
    {
        var userAgent = httpContext.Request.Headers["User-Agent"].ToString();
        if (DisallowsSameSite.DisallowsSameSiteNone(userAgent)) 
　　　　 { 
　　　　　　　　options.SameSite = SameSiteMode.Unspecified;
 　　　　} 
　　} 
}

步骤4:

创建DisallowsSameSite.DisallowsSameSiteNone静态方法

 public  class DisallowsSameSite
    {
        public static bool DisallowsSameSiteNone(string userAgent)
        {
            // Check if a null or empty string has been passed in, since this
            // will cause further interrogation of the useragent to fail.
            if (String.IsNullOrWhiteSpace(userAgent))
                return false;

            // Cover all iOS based browsers here. This includes:
            // - Safari on iOS 12 for iPhone, iPod Touch, iPad
            // - WkWebview on iOS 12 for iPhone, iPod Touch, iPad
            // - Chrome on iOS 12 for iPhone, iPod Touch, iPad
            // All of which are broken by SameSite=None, because they use the iOS networking
            // stack.
            if (userAgent.Contains("CPU iPhone OS 12") ||
                userAgent.Contains("iPad; CPU OS 12"))
            {
                return true;
            }

            // Cover Mac OS X based browsers that use the Mac OS networking stack. 
            // This includes:
            // - Safari on Mac OS X.
            // This does not include:
            // - Chrome on Mac OS X
            // Because they do not use the Mac OS networking stack.
            if (userAgent.Contains("Macintosh; Intel Mac OS X 10_14") &&
                userAgent.Contains("Version/") && userAgent.Contains("Safari"))
            {
                return true;
            }

            // Cover Chrome 50-69, because some versions are broken by SameSite=None, 
            // and none in this range require it.
            // Note: this covers some pre-Chromium Edge versions, 
            // but pre-Chromium Edge does not require SameSite=None.
            if (userAgent.Contains("Chrome/5") || userAgent.Contains("Chrome/6"))
            {
                return true;
            }

            return false;
        }
    }

引用：https://www.cnblogs.com/JulianHuang/p/12596115.html