c# - .Net OWIN WebApiConfig 未被调用

Question

我创建了一个空白项目，这样我就可以创建一个角度应用程序。现在我已经准备就绪，我决定要将 Web API 添加到该项目中。我安装了所有必需的包并设置了 WebApiConfig.cs 文件。然后我安装了 OWIN 并创建了 OWIN Startup Class。当我运行我的项目时，OWIN Startup Class 被正确调用，但 WebApiConfig 没有。

过去(OWIN 之前)使用 Global.asax 是触发所有配置类的方式，但因为我使用的是 OWIN global. asax 文件不是必需的，因此我从未创建它。

有没有人遇到过这个并且知道我做错了什么？

更新 1

我添加了一个 Global.asax 页面并执行了它。我的印象是，如果你使用 OWIN，你应该删除你的 Global.asax 文件吗？

这两个都是Global.asax文件

public class Global : HttpApplication
{

    protected void Application_Start()
    {
        // Add these two lines to initialize Routes and Filters:
        WebApiConfig.Register(GlobalConfiguration.Configuration);
    }
}

和Startup.Config 文件。

public class StartupConfig
{
    public static UserService<User> UserService { get; set; }
    public static string PublicClientId { get; private set; }
    public static OAuthAuthorizationServerOptions OAuthOptions { get; private set; }

    static StartupConfig()
    {
        UserService = new UserService<User>(new UnitOfWork<DatabaseContext>(), false, true);
        PublicClientId = "self";

        OAuthOptions = new OAuthAuthorizationServerOptions
        {
            TokenEndpointPath = new PathString("/Token"),
            Provider = new OAuthProvider<User>(PublicClientId, UserService),
            AuthorizeEndpointPath = new PathString("/api/Account/ExternalLogin"),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(14),
            AllowInsecureHttp = true
        };
    }

    // For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
    public void Configuration(IAppBuilder app)
    {
        // Enable the application to use a cookie to store information for the signed in user
        // and to use a cookie to temporarily store information about a user logging in with a third party login provider
        app.UseCookieAuthentication(new CookieAuthenticationOptions());
        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

        // Enable the application to use bearer tokens to authenticate users
        app.UseOAuthBearerTokens(OAuthOptions);

        // Uncomment the following lines to enable logging in with third party login providers
        //app.UseMicrosoftAccountAuthentication(
        //    clientId: "",
        //    clientSecret: "");

        //app.UseTwitterAuthentication(
        //    consumerKey: "vnaJZLYwWFbv7GBlDeMbfwAlD",
        //    consumerSecret: "Q1FE1hEN6prXnK2O9TYihTFyOQmcQmrZJses0rT8Au4OsDQISQ");

        //app.UseFacebookAuthentication(
        //    appId: "",
        //    appSecret: "");

        //app.UseGoogleAuthentication();
    }
}

更新 2

我的启动类现在看起来像这样:

public class StartupConfig
{
    public static UserService<User> UserService { get; set; }
    public static string PublicClientId { get; private set; }
    public static OAuthAuthorizationServerOptions OAuthOptions { get; private set; }

    static StartupConfig()
    {
        UserService = new UserService<User>(new UnitOfWork<DatabaseContext>(), false, true);
        PublicClientId = "self";

        OAuthOptions = new OAuthAuthorizationServerOptions
        {
            TokenEndpointPath = new PathString("/Token"),
            Provider = new OAuthProvider<User>(PublicClientId, UserService),
            AuthorizeEndpointPath = new PathString("/api/Account/ExternalLogin"),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(14),
            AllowInsecureHttp = true
        };
    }

    // For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
    public void Configuration(IAppBuilder app)
    {
        //var config = new HttpConfiguration();

        //// Set up our configuration
        //WebApiConfig.Register(config);

        // Enable the application to use a cookie to store information for the signed in user
        // and to use a cookie to temporarily store information about a user logging in with a third party login provider
        app.UseCookieAuthentication(new CookieAuthenticationOptions());
        app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

        // Enable the application to use bearer tokens to authenticate users
        app.UseOAuthBearerTokens(OAuthOptions);

        // Uncomment the following lines to enable logging in with third party login providers
        //app.UseMicrosoftAccountAuthentication(
        //    clientId: "",
        //    clientSecret: "");

        //app.UseTwitterAuthentication(
        //    consumerKey: "vnaJZLYwWFbv7GBlDeMbfwAlD",
        //    consumerSecret: "Q1FE1hEN6prXnK2O9TYihTFyOQmcQmrZJses0rT8Au4OsDQISQ");

        //app.UseFacebookAuthentication(
        //    appId: "",
        //    appSecret: "");

        //app.UseGoogleAuthentication();
    }
}

如果我取消注释 WebApiConfig 行，则永远不会执行启动类。知道为什么吗？

Answer 1

您需要在启动类中调用 app.UseWebApi，传入您要使用的配置。您还需要在那里调用 WebApiConfig 的 Register 方法。这在简化的应用程序中可能看起来如何的示例是:

您可以有一个如下所示的 OWIN 启动类:

// Tell OWIN to start with this
[assembly: OwinStartup(typeof(MyWebApi.Startup))]
namespace MyWebApi
{
    public class Startup
    {
        /// <summary>
        /// This method gets called automatically by OWIN when the application starts, it will pass in the IAppBuilder instance.
        /// The WebApi is registered here and one of the built in shortcuts for using the WebApi is called to initialise it.
        /// </summary>
        public void Configuration(IAppBuilder app)
        {
            var config = new HttpConfiguration();
            WebApiConfig.Register(config);
            app.UseWebApi(config);
        }
    }
}

创建 HttpConfiguration 并将其传递给 WebApiConfig.Register 方法。然后我们使用 app.UseWebApi(config) 方法来设置 web api。这是System.Web.Http.Owin中的辅助方法，您可以通过包含NuGet包Microsoft ASP.NET Web API 2.2 OWIN

来获取它

WebApiConfig 类看起来像这样:

namespace MyWebApi
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // Web API routes
            config.MapHttpAttributeRoutes();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }
    }
}