WebApi 的三种寄宿方式

Posted 2020-10-30 努力决定下限

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新建一个类库:

SelfHost:

方法一:

1.添加对MyControllers类库的引用.

2.在控制台代码中加入一行代码:

当然,可以添加多个程序集.(记得引用)

            var config = new HttpSelfHostConfiguration("http://localhost:9527");
            config.Routes.MapHttpRoute(
                "API Default",
                "api/{controller}/{action}/{id}",
                new { id = RouteParameter.Optional });

            //加载外部程序集
            Assembly.Load("MyControllers");

            using (var server = new HttpSelfHostServer(config))
            {
                server.OpenAsync().Wait();
                Console.WriteLine("请开始您的表演");
                Console.ReadLine();
            }

View Code

3.测试结果:

方法二:

1.新建自定义的 AssembliesResolver 类

View Code

2.修改控制台代码:

            var config = new HttpSelfHostConfiguration("http://localhost:9527");
            config.Routes.MapHttpRoute(
                "API Default",
                "api/{controller}/{action}/{id}",
                new { id = RouteParameter.Optional });

            //加载外部程序集
            //Assembly.Load("MyControllers");
            //Assembly.Load("TestControllers");

            config.Services.Replace(typeof(IAssembliesResolver), new MyAssembiesResolver());

            using (var server = new HttpSelfHostServer(config))
            {
                server.OpenAsync().Wait();
                Console.WriteLine("请开始您的表演");
                Console.ReadLine();
            }

View Code

实际上就添了一行代码...

3.测试:

上面的方法将程序集写死在代码里,这肯定不符合要求.

方法三:

新建3个类,如下:

    public class AppConfigSetting
    {
        public static string AssembliesLoadFrom => GetValue();

        public static string GetValue([CallerMemberName]string key = null)
        {
            return System.Configuration.ConfigurationManager.AppSettings[key];
        }
    }

    public class AssembliesLoad : ConfigurationSection
    {

        [ConfigurationProperty("", IsDefaultCollection = true)]
        public AssemblyElementCollection AssemblyNames
        {
            get { return (AssemblyElementCollection)this[""]; }
        }

        public static AssembliesLoad GetSection()
        {
            return ConfigurationManager.GetSection(AppConfigSetting.AssembliesLoadFrom) as AssembliesLoad;
        }
    }
    public class AssemblyElementCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new AssemblyElement();
        }
        protected override object GetElementKey(ConfigurationElement element)
        {
            AssemblyElement serviceTypeElement = (AssemblyElement)element;
            return serviceTypeElement.AssemblyName;
        }
    }

    public class AssemblyElement : ConfigurationElement
    {
        [ConfigurationProperty("assemblyName", IsRequired = true)]
        public string AssemblyName
        {
            get { return (string)this["assemblyName"]; }
            set { this["assemblyName"] = value; }
        }
    }

    public class WebApiResolver : DefaultAssembliesResolver
    {
        public override ICollection<Assembly> GetAssemblies()
        {
            AssembliesLoad settings = AssembliesLoad.GetSection();
            if (null != settings)
            {
                try
                {
                    foreach (AssemblyElement element in settings.AssemblyNames)
                    {
                        AssemblyName assemblyName = AssemblyName.GetAssemblyName(element.AssemblyName);
                        if (!AppDomain.CurrentDomain.GetAssemblies().Any(assembly => AssemblyName.ReferenceMatchesDefinition(assembly.GetName(), assemblyName)))
                        {
                            AppDomain.CurrentDomain.Load(assemblyName);
                        }
                    }
                }
                catch (Exception e)
                {

                }
            }
            return base.GetAssemblies();
        }
    }

修改配置文件:

<configuration>
  <configSections>
    <section name="test1" type="SelfHost.AssembliesLoad,SelfHost"/>
    <section name="test2" type="SelfHost.AssembliesLoad,SelfHost"/>
  </configSections>

  <appSettings>
    <add key="AssembliesLoadFrom" value="test1"/>
  </appSettings>

  <test1>
    <add assemblyName="MyControllers.dll" />
    <add assemblyName="TestControllers.dll" />
  </test1>

  <test2>
    <add assemblyName="Wjire.Controllers.dll" />
  </test2>

  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
</configuration>