在子站点中使用 Postal 和 Hangfire

Question

我一直在尝试在我的 MVC5 网站上使用 Postal。当我托管我的网页子站点时，即 http://localhost/Subsite 我收到错误

虚拟路径“/”映射到另一个应用程序，这是不允许的

我已将其调试到创建 ControllerContext 时 HttpContext 未正确设置。由于我是来自 Hangfire 的运行邮政，因此 HttpContext.Current 始终为空。 Postal 使用以下代码创建 ContollerContext。

        ControllerContext CreateControllerContext()
    {
        // A dummy HttpContextBase that is enough to allow the view to be rendered.
        var httpContext = new HttpContextWrapper(
            new HttpContext(
                new HttpRequest("", UrlRoot(), ""),
                new HttpResponse(TextWriter.Null)
            )
        );
        var routeData = new RouteData();
        routeData.Values["controller"] = EmailViewDirectoryName;
        var requestContext = new RequestContext(httpContext, routeData);
        var stubController = new StubController();
        var controllerContext = new ControllerContext(requestContext, stubController);
        stubController.ControllerContext = controllerContext;
        return controllerContext;
    }

    string UrlRoot()
    {
        var httpContext = HttpContext.Current;
        if (httpContext == null)
        {
            return "http://localhost";
        }

        return httpContext.Request.Url.GetLeftPart(UriPartial.Authority) +
               httpContext.Request.ApplicationPath;
    }

如何指定 UrlRoot，而不是根据我的子站点拉取本地主机的默认值？

Answer 1

我按照此处的说明 http://docs.hangfire.io/en/latest/tutorials/send-email.html 发送了我的电子邮件。教程中的方法如下

    public static void NotifyNewComment(int commentId)
{
// Prepare Postal classes to work outside of ASP.NET request
var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));
var engines = new ViewEngineCollection();
engines.Add(new FileSystemRazorViewEngine(viewsPath));

var emailService = new EmailService(engines);

// Get comment and send a notification.
using (var db = new MailerDbContext())
{
    var comment = db.Comments.Find(commentId);

    var email = new NewCommentEmail
    {
        To = "yourmail@example.com",
        UserName = comment.UserName,
        Comment = comment.Text
    };

    emailService.Send(email);
}
}

我发现问题是 FileSystemRazorViewEngine 没有被邮政使用。为了让它工作，我必须确保 FileSystemRazorViewEngine 是可用的第一个引擎。然后我删除了它，因为我不希望它成为默认引擎。下面是我更新的方法。

    public static void NotifyNewComment(int commentId)
{
// Prepare Postal classes to work outside of ASP.NET request
var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));
var eng = new FileSystemRazorViewEngine(viewsPath));
ViewEngines.Engines.Insert(0, eng);

var emailService = new EmailService(engines);

// Get comment and send a notification.
using (var db = new MailerDbContext())
{
    var comment = db.Comments.Find(commentId);

    var email = new NewCommentEmail
    {
        To = "yourmail@example.com",
        UserName = comment.UserName,
        Comment = comment.Text
    };

    emailService.Send(email);
    ViewEngines.Engines.RemoveAt(0)
}
}

Answer 2

下面是我认为比上面更优雅的另一种可能的解决方案。它还解决了在后台进程正在执行时访问 MVC 应用程序时出现的问题。

public static void SendTypedEmailBackground()
{
    try
    {
        var engines = new ViewEngineCollection();
        var viewsPath = Path.GetFullPath(HostingEnvironment.MapPath(@"~/Views/Emails"));

        var eng = new FileSystemRazorViewEngine(viewsPath);
        engines.Add(eng);

        var email = new WebApplication1.Controllers.EmailController.TypedEmail();
        email.Date = DateTime.UtcNow.ToString();
        IEmailService service = new Postal.EmailService(engines);
        service.Send(email);

    }
    catch(Exception ex)
    {
        throw ex;
    }
}

在子站点中使用 Postal 和 Hangfire

Using Postal and Hangfire in Subsite

asp.net-mvc

postal

asp.net-mvc-5

hangfire