咱们在很多时候(比方重置明码),都须要用户的Email。但在应用之前,须要保障用户输出的Email是:

真实有效,且
属于以后用户的
惯常的方法就是对其进行验证/激活。

策略

如图所示:

用户:输出他的Email地址,提交给服务器
服务器:为该Email生成一个验证码code(为了平安期间,还能够有一个无限截止工夫),将email和code一起保留到数据库
服务器:将验证码code发送到该Email中。为了不便用户操作,通常是发送一个链接,链接中蕴含该code和Email的Id
用户:从Email邮箱中取得code(或者间接点击发送过去的链接),到服务器激活
服务器:将用户输出的code和数据库中的存储的值进行比对,如果无误的话,激活该email(email.IsValid=true)
整个流程的要害就在于:用户只能通过他留下的email获取激活code。

实现

发送Email
Email并不能在用户之间间接传递,而是依赖于邮件的:

发送服务器(如下图:smtp.163.com)
接管服务器(如下图:pop.qq.com)

发送方(sender)将email推送给邮件发送服务器。这一过程能够由用户登录邮箱网站实现,或应用其余邮箱软件(如outlook)推送
163.com按邮件收件人地址将email推送到qq.com服务器
收件方(receiver)从服务器拉取本人的email
上述3个过程,1和2都是推送,应用SMTP(Simple Mail Transfer Protocol)协定;3是拉取,应用的是POP3协定。

咱们开发只关注第1个阶段。.NET为咱们提供了现成的类库:

首先,引入命名空间:

using System.Net.Mail; //留神不要援用成System.Web.Mail
而后,用一个MailMessage对象配置Email自身的相干信息:

MailMessage mail = new MailMessage();mail.From = new MailAddress(ConfigurationManager.AppSettings["EmailAddress"]);mail.To.Add(address);mail.Subject = "激活Email";mail.IsBodyHtml = true;  //最终出现款式由收件服务器决定mail.Body = $"感激你的注册……";接下来,配置SMTP服务器(本人邮箱所在)

不能应用SSL形式发送

邮箱地址:feige_20200214@163.com

明码:yuanzhan17bang(登录) / yz17bang(客户端受权)

(演示:略)

中的难点:

按职责:
url格局(应用的http协定、域名、门路、url参数名等)均在UI层生成

        string validationUrlFormat =             $"{Request.Scheme}://{Request.Host}/Email/Validate?{_code}={{0}}&{_id}={{1}}";

Email验证码应在BLL层生成

    public void MakeValidationCode()    {        ValidationCode = new Random().Next().ToString();    }

Email的Id须要在Email被Repository存储之后能力生成

    public void Save(Email email)    {        Emails.Add(email);        SaveChanges();    }

那么,Email的发送应该是哪一个层的职责?
如何保障验证码只生成一次?
构造函数和属性都会被EF重复调用,不宜应用(演示:略)。
留神:不倡议在Entity(须要映射到数据库的实体类)的构造函数和属性中退出业务逻辑
办法如何避免被屡次调用?

        //领会:异样应用的场景        if (!string.IsNullOrEmpty(ValidationCode))        {            throw new InvalidOperationException(                $"在ValidationCode已有值的状况下(以后值为:{ValidationCode}),试图再次生成");        }

课间作业:

事实上有没有激活?
为什么须要:if (!string.IsNullOrEmpty(id) && !string.IsNullOrEmpty(code))
补充:exception

作业:

实现用户登录全副性能,包含:导航栏变更(登录/退出登录)、老手工作等

尔后所有作业都须要按我的项目流程:公布需要 - 承接 - 验收,团队实现,尔后不再反复阐明。

作业点评:

留神entity的可拜访性 (只读)
需要文档:一体两用(开发/测试)
开发设计文档 vs 需要文档
肯定要指定实现工夫,未及时实现项目经理要催

示例:

原需要:能够应用邮箱找回明码,点击发送邮件获取验证码,用验证码重置明码,重置明码的邮件会发送到你填写的Email中。
问题:

找回明码的入口(页面)在哪里?页面内容如何?
发送邮件如何获取验证码?弹出提醒吗?
如何用验证码重置明码?须要本人填写吗?https://github.com/hdfgfgh546...
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