. Net WebApi and. netwebapi

. Net WebApi and. netwebapi

The Service layer is shared with the api layer, indicating that the Service layer is the api layer.

• Key classes and interfaces

  • System. Web. Http. Dispatcher. DefaultHttpControllerSelector

  Webpai selects the default Implementation of the controller. You can override the SelectController method.

  • System. Web. Http. Controllers. ApiControllerActionSelector

  Webapi selects the default implementation of action under the specified controller. You can override the SelectAction method.

  • System. Web. Http. ApiController

  The base class of the api controller. All classes inherited from this class can become Api controllers.

   

• Class and interface relationship diagram api custom extension implementation

Api registration process

If the Controller of the Servie layer is implemented.

• AllServices must inherit from the ApiController class.To enable the Service class to have the Controller feature ApiServier class code (inherit from ApiController, and set the service base class for later extension ):

public class ApiService:System.Web.Http.ApiController{}

TestServer code:

public class TestService:ApiService{    public string Get()    {        return "Get-Test";    }}

Implement Service Classes and have ApiController capabilities

• Implement the ServiceContainer class, implement service class caching, and use it to select a class for Controller. Obtain the Service Class Code as follows:

private void Init(){    var assembly = System.Reflection.Assembly.GetExecutingAssembly();    var ls = assembly.GetTypes().Where(x => typeof(Services.ApiService).IsAssignableFrom(x));    foreach(var item in ls)    {        _apis.Add(item.FullName, item);    }}

• Rewrite the api and select the controller class code:

Public class CustomSelectController: System. web. http. dispatcher. defaultHttpControllerSelector {public CustomSelectController (System. web. http. httpConfiguration config): base (config) {} public override HttpControllerDescriptor SelectController (HttpRequestMessage request) {var routeData = request. getRouteData (). values; foreach (var route in routeData) {if (route. key = "controller") {// find the controller Var controllerType = ServicesContainer. createInstance (). apis. where (x => x. key. toLower (). indexOf (route. value. toString () + "service")> 0 ). firstOrDefault (); if (controllerType. value! = Null) {return new DyControllerDescriptor (request. GetConfiguration (), controllerType. Value) ;}} return base. SelectController (request );}}

Note:

public class CustomActionActivator:System.Web.Http.Controllers.ApiControllerActionSelector{    public override HttpActionDescriptor SelectAction(HttpControllerContext controllerContext)    {        if (!(controllerContext.ControllerDescriptor is DyControllerDescriptor))        {            return base.SelectAction(controllerContext);        }        var realType = controllerContext.ControllerDescriptor as DyControllerDescriptor;        Type[] types = new Type[0];        System.Reflection.MethodInfo methodInfo = realType.ControllerInfo.GetMethod("Get",             types);        return new DyActionDescriptor(controllerContext.Configuration, controllerContext.ControllerDescriptor, methodInfo);    }}

• Note:

   

• When injecting Api routes to Global. cs, the routes must be injected before Mvc injection.

Protected void Application_Start () {common. servicesContainer. createInstance (); AreaRegistration. registerAllAreas (); // It must be placed in RouteConfig. globalConfiguration. configure (config) => {config. routes. mapHttpRoute (name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new {id = RouteParameter. optional}) ;}); FilterConfig. registerGlobalFilters (GlobalFilters. filters); RouteConfig. registerRoutes (RouteTable. routes); BundleConfig. registerBundles (BundleTable. bundles); GlobalConfiguration. configuration. services. replace (typeof (System. web. http. dispatcher. IHttpControllerSelector), new common. customSelectController (GlobalConfiguration. configuration); GlobalConfiguration. configuration. services. replace (typeof (System. web. http. controllers. IHttpActionSelector), new common. customActionActivator ());}

Running result: