Owin在web.config中提供启动类(没有自动启动发现)

Question

我尝试在web.config中执行以下操作:

<appSettings>
   <add key="owin:AutomaticAppStartup" value="false" />
   <add key="owin:appStartup" value="MyNamespace.MyStartupClass" />
</appSettings>

如果我正确理解本文档,则应禁用自动启动检测.所以我不需要启动属性.

不幸的是,看起来OWIN无法启动.(我看到这个是因为我收到了错误:HTTP Error 403.14 - Forbidden.我使用控制器来处理对索引文件的请求.)

如果我使用<add key="owin:AutomaticAppStartup" value="true" />并添加启动属性,[assembly: OwinStartup(typeof(MyStartupClass))]那么应用程序会按预期启动.

所以问题是为什么？我该怎么做才能解决这个问题？

我正在使用OWIN 3.0.0.0

更新:

这就是我的启动类的样子(带有相关部分的缩小版):

using System.Web.Http;
using Microsoft.AspNet.SignalR;
using Microsoft.Owin;
using Owin;
using MyOtherNamespace;

namespace MyNamespace
{
    public class MyOnlineStartup : MyOtherStartup
    {
        public new void Configuration(IAppBuilder app)
        {
            base.Configuration(app); //Call base method! This is important because otherwise ther serilization will not be correct
            HttpConfiguration config = CreateRouting();
            config.Routes.MapHttpRoute("exampleAppNone", "", new { controller = "MyIndex" }, null, null);
            config.Routes.MapHttpRoute("exampleAppIndex", "index.html", new { controller = "MyIndex" }, null, null);
            app.UseWebApi(config); // Use the WebAPI technology.
        }
    }
}

它来源于

using System.Linq;
using System.Web.Http;
using Microsoft.AspNet.SignalR;
using Newtonsoft.Json;
using Owin;

namespace MyOtherNamespace
{
    public class MyOtherStartup
    {
        protected static HttpConfiguration CreateMyRouting()
        {
            HttpConfiguration config = new HttpConfiguration();
            config.Routes.MapHttpRoute(
                "myIndex",
                "my/",
                new
                {
                    controller = "MyIndex"
                },
                null,
                null
                );
            config.Routes.MapHttpRoute(
                "myIndex2",
                "my/index.html",
                new
                {
                    controller = "MyIndex"
                },
                null,
                null
                );
            var appXmlType = config.Formatters.XmlFormatter.SupportedMediaTypes.FirstOrDefault(t => t.MediaType == "application/xml");
            config.Formatters.XmlFormatter.SupportedMediaTypes.Remove(appXmlType);
            config.Formatters.JsonFormatter.SerializerSettings.TypeNameHandling = TypeNameHandling.Auto
            return config;
        }

        public void Configuration(IAppBuilder app)
        {
            JsonSerializer serializer = Serialization.ClientJsonSerializer();
            serializer.ContractResolver = new MySerializationContractResolver(false);
            GlobalHost.DependencyResolver.Register(typeof(JsonSerializer), () => serializer);
            app.MapSignalR("/" + MyRequestHandler.MySignalRPath, new HubConfiguration());          
        }
    }
}

Answer 1

只需删除web.config文件中的这行代码:

<add key="owin:AutomaticAppStartup" value="false" />

您的web.config文件现在必须如下所示:

<appSettings>
    <add key="owin:appStartup" value="MyNamespace.MyStartupClass" />
</appSettings>  

通过添加只是owin:appStartup键,您不需要启动属性.