11

我正在尝试创建一个允许我通过 Web 应用程序或 Windows 服务托管“WebAPI”网站的系统。为此,我希望我的所有业务逻辑都包含在一个类库中,以便我可以在我的 Windows 服务和我的“Web”(IIS)服务中引用它。

我目前的想法是使用 HttpSelfHostServer 中包含的自托管选项。对于 web 端,我将创建一个标准的 webapi 网站并添加一些对我的类库的引用。

我发现,如果我的控制器与 HttpSelfHostServer 位于相同的命名空间中,它可以正常工作,但是一旦控制器位于外部类库中,服务器就无法再解析到我的控件/操作的路由。

我的代码:

视窗服务:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Reflection;
using System.IO;

using System.Web.Http.SelfHost;
using System.Web.Http;
using System.Web.Http.Dispatcher;

using WebApiClasses;
using WebApiClasses.Controllers;

namespace WebAPISelfHost
{
    public partial class Service1 : ServiceBase
    {
        private HttpSelfHostServer _server;
        private readonly HttpSelfHostConfiguration _config;
        public const string ServiceAddress = "http://localhost:8080";

        public Service1()
        {
            InitializeComponent();

            _config = new HttpSelfHostConfiguration(ServiceAddress);

            //AssembliesResolver assemblyResolver = new AssembliesResolver();
            //_config.Services.Replace(typeof(IAssembliesResolver), assemblyResolver);

            _config.Routes.MapHttpRoute("DefaultApi",
                "api/{controller}/{id}",
                new { id = RouteParameter.Optional });

        }

        protected override void OnStart(string[] args)
        {
            _server = new HttpSelfHostServer(_config);
            _server.OpenAsync();
        }




        protected override void OnStop()
        {
            _server.CloseAsync().Wait();
            _server.Dispose();
        }
    }

    //public class TestController : ApiController
    //{
    //    public string Get()
    //    {
    //        return "This is an internal test message.";
    //    }
    //}

    class AssembliesResolver : DefaultAssembliesResolver
    {
        public override ICollection<Assembly> GetAssemblies()
        {
            ICollection<Assembly> baseAssemblies = base.GetAssemblies();
            List<Assembly> assemblies = new List<Assembly>(baseAssemblies);

            // Add whatever additional assemblies you wish

            var controllersAssembly = Assembly.LoadFrom(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + @"\WebApiClasses.dll");
            baseAssemblies.Add(controllersAssembly);
            return assemblies;
        }
    }
}

控制器:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Web.Http;

namespace WebApiClasses.Controllers
{
    public class TestController : ApiController
    {
        public string Get()
        {
            return "hello from class library";
        }
    }
}

当我尝试导航到:“http://localhost:8080/api/”时,我得到:

未找到与请求 URI 'http://localhost:8080/api/' 匹配的 HTTP 资源。找不到与名为“Test”的控制器匹配的类型。

有什么建议么?我想我应该能够做到这一点。

4

5 回答 5

11

看看这篇文章http://www.strathweb.com/2012/06/using-controllers-from-an-external-assembly-in-asp-net-web-api/

在其中,他们描述了如何加载带有控制器的额外程序集。

于 2012-12-19T11:34:34.230 回答
2

我有一个类似的问题,我做了以下操作并解决了它。

  1. 首先在 api 项目中添加来自外部类库的引用。
  2. 控制器必须继承自 ApiController
  3. 控制器类必须具有公共访问修饰符,并且控制器名称必须以 Controller 结尾。例如TestController ,EmployeeController
  4. 并且非常重要的 nuget 包必须具有相同的版本。

我还建议使用 [HttpGet]、[HttpPost] 等属性

于 2019-06-21T08:19:12.420 回答
2

对于自托管方案,请按照其他解决方案的建议提供自定义 IAssembliesResolver 实现,并通过使用控制器程序集中的类型或其文件路径将所需的程序集添加到集合中。

class AssembliesResolver : DefaultAssembliesResolver
{
    public override ICollection<Assembly> GetAssemblies()
    {
        ICollection<Assembly> baseAssemblies = base.GetAssemblies();
        List<Assembly> assemblies = new List<Assembly>(baseAssemblies);

        //Load by a type in the assembly
        var _serviceAssembly = Assembly.GetAssembly(typeof(CarsController));

        //Load from a file
        //var _serviceAssembly = Assembly.LoadFrom("abc.dll");

        //Check if the assembly is already in the list
        //if you are getting the assembly reference by a type in it,
        //The assembly will probably be in the list
        if (!assemblies.Contains(_serviceAssembly))
            assemblies.Add(_serviceAssembly);

        return assemblies;
    }

然后在控制台应用程序的 Main 方法或服务类的 OnStart 方法中,替换程序集解析器服务。

var config = new HttpSelfHostConfiguration("http://localhost:3000");
config.Services.Replace(typeof(IAssembliesResolver), new AssembliesResolver());
config.Routes.MapHttpRoute("default", "api/{controller}/{action}/{id}", new { id = RouteParameter.Optional });
var server = new HttpSelfHostServer(config);
server.OpenAsync().Wait();
于 2018-04-11T08:23:53.053 回答
0

对于未来的读者。

这是(一种方式)您如何使用不同的程序集和使用 IIS。

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services
        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            //routeTemplate: "api/{controller}/{id}",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Http.Dispatcher;

public class MyCustomAssemblyResolver : DefaultAssembliesResolver
{
    public override ICollection<Assembly> GetAssemblies()
    {
        ICollection<Assembly> baseAssemblies = base.GetAssemblies();
        List<Assembly> assemblies = new List<Assembly>(baseAssemblies);
        Type myType = typeof(MyControllerInAnotherAssembly);
        var controllersAssembly = Assembly.GetAssembly(myType );
        baseAssemblies.Add(controllersAssembly);
        return assemblies;
    }
}

和 (Global.asax)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http;
using System.Web.Http.Dispatcher;
using System.Web.Security;
using System.Web.SessionState;


public class Global : System.Web.HttpApplication
{
    protected void Application_Start(object sender, EventArgs e)
    {
        WebApiConfig.Register(GlobalConfiguration.Configuration);    
        GlobalConfiguration.Configuration.Services.Replace(typeof(IAssembliesResolver), new MyCustomAssemblyResolver());
    }
}
于 2014-12-22T18:56:20.233 回答
0

我最终发现了如何做到这一点,我不得不重新安排我的代码:

视窗服务:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Reflection;
using System.IO;

using System.Threading.Tasks;
using System.Web.Http;
using System.Web.Http.Dispatcher;
using System.Web.Http.SelfHost;

namespace WebAPISelfHost
{
    public partial class Service1 : ServiceBase
    {
        static HttpSelfHostServer CreateHost(string address)
        {
            // Create normal config
            HttpSelfHostConfiguration config = new HttpSelfHostConfiguration(address);

            // Set our own assembly resolver where we add the assemblies we need
            AssembliesResolver assemblyResolver = new AssembliesResolver();
            config.Services.Replace(typeof(IAssembliesResolver), assemblyResolver);

            // Add a route
            config.Routes.MapHttpRoute(
              name: "default",
              routeTemplate: "api/{controller}/{id}",
              defaults: new { controller = "Home", id = RouteParameter.Optional });

            HttpSelfHostServer server = new HttpSelfHostServer(config);
            server.OpenAsync().Wait();

            return server;
        }

        public Service1()
        {
            InitializeComponent();

        }

        protected override void OnStart(string[] args)
        {
            HttpSelfHostServer server = CreateHost("http://localhost:8080");
        }

        protected override void OnStop()
        {
        }
    }

    class AssembliesResolver : DefaultAssembliesResolver
    {
        public override ICollection<Assembly> GetAssemblies()
        {
            ICollection<Assembly> baseAssemblies = base.GetAssemblies();
            List<Assembly> assemblies = new List<Assembly>(baseAssemblies);

            assemblies.Add(Assembly.LoadFrom(@"C:\Users\david.kolosowski\Documents\Visual Studio 2010\Projects\WebAPISelfHost\WebAPISelfHost\bin\Debug\ClassLibrary1.dll"));

            return assemblies;
        }
    }
}

类库:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Web.Http;

namespace ClassLibrary1
{
    public class TestController : ApiController
    {
        public string Get()
        {
            return "hello from class library2";
        }
    }
}

我认为解决方案存在各种配置问题,因此我删除了所有参考并仅添加了每个项目所需的参考。

感谢所有发布建议的人。

于 2012-12-20T09:23:58.817 回答