标签：generate virt and ued sed ext serial hand config
public class WebApiApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
//api路由注册
GlobalConfiguration.Configure(WebApiConfig.Register);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
}
}
public static void Configure(Action<HttpConfiguration> configurationCallback) { if (configurationCallback == null) { throw new ArgumentNullException("configurationCallback"); }
//执行WebApiConfig.Register方法并传入参数GlobalConfiguration.Configuration configurationCallback(GlobalConfiguration.Configuration); GlobalConfiguration.Configuration.EnsureInitialized(); }
1.public static HttpConfiguration Configuration { get { return GlobalConfiguration._configuration.Value; } } 2.private static Lazy<HttpConfiguration> _configuration = GlobalConfiguration.CreateConfiguration(); 3.private static Lazy<HttpConfiguration> CreateConfiguration() { Func<HttpConfiguration> arg_1F_0; if ((arg_1F_0 = GlobalConfiguration.<>c.<>9__11_0) == null) { arg_1F_0 = (GlobalConfiguration.<>c.<>9__11_0 = new Func<HttpConfiguration>(GlobalConfiguration.<>c.<>9.<CreateConfiguration>b__11_0)); } return new Lazy<HttpConfiguration>(arg_1F_0); } 4.[CompilerGenerated] [Serializable] private sealed class <>c { public static readonly GlobalConfiguration.<>c <>9 = new GlobalConfiguration.<>c(); ....internal HttpConfiguration <CreateConfiguration>b__11_0() {
//RouteTable.Routes全局路由变量 HttpConfiguration expr_0F = new HttpConfiguration(new HostedHttpRouteCollection(RouteTable.Routes)); ServicesContainer services = expr_0F.Services; services.Replace(typeof(IAssembliesResolver), new WebHostAssembliesResolver()); services.Replace(typeof(IHttpControllerTypeResolver), new WebHostHttpControllerTypeResolver()); services.Replace(typeof(IHostBufferPolicySelector), new WebHostBufferPolicySelector()); services.Replace(typeof(IExceptionHandler), new WebHostExceptionHandler(services.GetExceptionHandler())); return expr_0F; } }
public static class WebApiConfig { public static void Register(HttpConfiguration config) { // Web API 配置和服务 // Web API 路由 config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } ); } }
由参数可知config.Routes为HostedHttpRouteCollection类型
对应MapHttpRoute方法
public static IHttpRoute MapHttpRoute(this HttpRouteCollection routes, string name, string routeTemplate, object defaults, object constraints, HttpMessageHandler handler) { if (routes == null) { throw Error.ArgumentNull("routes"); } HttpRouteValueDictionary defaults2 = new HttpRouteValueDictionary(defaults); HttpRouteValueDictionary constraints2 = new HttpRouteValueDictionary(constraints);
//1.封装单个路由 IHttpRoute httpRoute = routes.CreateRoute(routeTemplate, defaults2, constraints2, null, handler);
//2.把路由加入HostedHttpRouteCollection中
routes.Add(name, httpRoute); return httpRoute; }
//1.封装单个路由 routes.CreateRoute方法
public override IHttpRoute CreateRoute(string uriTemplate, IDictionary<string, object> defaults, IDictionary<string, object> constraints, IDictionary<string, object> dataTokens, HttpMessageHandler handler) { if (constraints != null) { foreach (KeyValuePair<string, object> current in constraints) { this.ValidateConstraint(uriTemplate, current.Key, current.Value); } } return new HostedHttpRoute(uriTemplate, defaults, constraints, dataTokens, handler); }
可知HostedHttpRouteCollection中类型为HostedHttpRoute类型
//2.把路由加入HostedHttpRouteCollection中routes.Add方法
public override void Add(string name, IHttpRoute route) { this._routeCollection.Add(name, route.ToRoute()); }
从参数第4步可知_routeCollection为全局变量RouteTable.Routes中
所以webapi中路由的注册实际最后也是注册到RouteTable.Routes全局变量中
根据前边可知webapi的路由最后同mvc一样都是注册到全局路由变量中,在路由中通过urlRoutingModule获取请求然后转发到对应的handler中,那么webapi对应的routehandler是什么呢?
从注册路由的maphttpRoute方法中
public static IHttpRoute MapHttpRoute(this HttpRouteCollection routes, string name, string routeTemplate, object defaults) { return routes.MapHttpRoute(name, routeTemplate, defaults, null, null); } public static IHttpRoute MapHttpRoute(this HttpRouteCollection routes, string name, string routeTemplate, object defaults, object constraints) { return routes.MapHttpRoute(name, routeTemplate, defaults, constraints, null); } public static IHttpRoute MapHttpRoute(this HttpRouteCollection routes, string name, string routeTemplate, object defaults, object constraints, HttpMessageHandler handler) { if (routes == null) { throw Error.ArgumentNull("routes"); } HttpRouteValueDictionary defaults2 = new HttpRouteValueDictionary(defaults); HttpRouteValueDictionary constraints2 = new HttpRouteValueDictionary(constraints); IHttpRoute httpRoute = routes.CreateRoute(routeTemplate, defaults2, constraints2, null, handler); routes.Add(name, httpRoute); return httpRoute; }
传入的handler参数都为null
在routes.CreateRoute方法中生成HostedHttpRoute调用构造函数时传入的也是null
public static IHttpRoute MapHttpRoute(this HttpRouteCollection routes, string name, string routeTemplate, object defaults, object constraints, HttpMessageHandler handler)
{
.....
//1.封装单个路由
IHttpRoute httpRoute = routes.CreateRoute(routeTemplate, defaults2, constraints2, null, handler);
.....
}
public override IHttpRoute CreateRoute(string uriTemplate, IDictionary<string, object> defaults, IDictionary<string, object> constraints, IDictionary<string, object> dataTokens, HttpMessageHandler handler)
{
.......
return new HostedHttpRoute(uriTemplate, defaults, constraints, dataTokens, handler);
}
HostedHttpRoute的构造函数
public HostedHttpRoute(string uriTemplate, IDictionary<string, object> defaults, IDictionary<string, object> constraints, IDictionary<string, object> dataTokens, HttpMessageHandler handler) { RouteValueDictionary defaults2 = (defaults != null) ? new RouteValueDictionary(defaults) : null; RouteValueDictionary constraints2 = (constraints != null) ? new RouteValueDictionary(constraints) : null; RouteValueDictionary dataTokens2 = (dataTokens != null) ? new RouteValueDictionary(dataTokens) : null; this.OriginalRoute = new HttpWebRoute(uriTemplate, defaults2, constraints2, dataTokens2, HttpControllerRouteHandler.Instance, this); this.Handler = handler; }
hostedHttpRoute中的getdata通过调用OriginalRoute属性获取对应的routedata.
综上:webapi对应的routehandler为HttpControllerRouteHandler
可知:webapi对应的routehandler为httpControllerRouteHandler
从httpControllerRouteHandler中
protected virtual IHttpHandler GetHttpHandler(RequestContext requestContext) { return new HttpControllerHandler(requestContext.RouteData); }
获得HttpControllerHandler.
标签：generate virt and ued sed ext serial hand config
原文地址：https://www.cnblogs.com/NNYang/p/11001183.html
