(精华)2020年10月21日 设计模式案例 AspNetCore运行原理

AspNetCore运行原理

#region { // 完成一个请求 /*// 1、加载Controller EndpointRouteBuilder endpointRouteBuilder = new EndpointRouteBuilder(); endpointRouteBuilder.MapControllers();// 扫描所有Controller // 2、创建EndpointRoute EndpointRoute endpointRoute = new EndpointRoute(); Endpoint endpoint = endpointRoute.Match("/index"); // 3、执行Endpoint EndpointHandler endpointHandler = new EndpointHandler(); object result = endpointHandler.HandlerEndpoint(endpoint, new object[] { "原理解析" }); // 4、对结果进行处理*/ EndpointMiddlewareFacde endpointMiddlewareFacde = new EndpointMiddlewareFacde(); endpointMiddlewareFacde.Invoke(new HttpContext()); } #endregion

Endpoint相关类

/// <summary> /// 端点(就是Action的抽象) /// </summary> class Endpoint { /// <summary> /// 方法信息 /// </summary> public MethodInfo methodInfo { set; get; } /// <summary> /// 方法参数 /// </summary> public IList<ParameterInfo> parameterInfos { set; get; } /// <summary> /// 方法返回值 /// </summary> public object returnValue { set; get; } /// <summary> /// 控制器 /// </summary> public object Controller { set; get; } } /// <summary> /// Endpoint数据源(存储Endpoint数据集合) /// </summary> class EndpointDataSources { /// <summary> /// Endpoint 集合 /// </summary> public IDictionary<string, Endpoint> endpoints { set; get; } = new Dictionary<string, Endpoint>(); } /// <summary> /// 端点处理 /// </summary> class EndpointHandler { /// <summary> /// 执行端点 /// </summary> /// <param name="endpoint"></param> /// <param name="providedArgs">方法参数值</param> /// <returns></returns> public object HandlerEndpoint(Endpoint endpoint,object[] providedArgs) { // 1、获取方法 MethodInfo methodInfo = endpoint.methodInfo; // 2、执行 return methodInfo.Invoke(endpoint.Controller, providedArgs); } } /// <summary> /// Endpoint 路由(根据路径进行匹配Endpoint) /// </summary> class EndpointRoute { public EndpointRouteBuilder endpointRouteBuilder { set; get; } public Endpoint Match(string requestPath) { // 匹配合适的Endpoint return endpointRouteBuilder.Build().endpoints[requestPath]; } } /// <summary> /// 构建EndpointDataSources(建造者设计模式) /// </summary> class EndpointRouteBuilder { /// <summary> /// Endpoint集合 /// </summary> private EndpointDataSources endpointDataSources = new EndpointDataSources(); /// <summary> /// 1、加载Controller类和相关特性 /// </summary> public void MapControllers() { // 1、解析controller 和action 装换成Endpoint(反射加载) Endpoint endpoint = new Endpoint(); endpoint.methodInfo = typeof(EndpointRouteBuilder).GetMethods()[0]; // 2、添加到端点集合 endpointDataSources.endpoints.Add("/index.html", endpoint); } /// <summary> /// 2、加载RazorPage页面Endpoint /// </summary> public void MapRazorPages() { } public EndpointDataSources Build() { return endpointDataSources; } } /// <summary> /// http上下文类(用于获取HttpRequest和HttpResponse) /// </summary> class HttpContext { }

适配器日志相关类

log4

/// <summary> /// Log4j日志输出 /// </summary> class Log4jLog : ILog { // Log4j日志 private log4net.ILog log; public Log4jLog(log4net.ILog log) { // 1、创建log4j日志 this.log = log; } public void Debug(string msg) { log.Debug(msg); } public void Error(string msg) { log.Error(msg); } public void Info(string msg) { log.Info(msg); } public void Warn(string msg) { log.Warn(msg); } } /// <summary> /// Log适配器，将log4j和Nlog转换成为需要的ILog /// </summary> class Log4NetLogAdpater : ILogAdpater { public ILog GetLog(Type type) { NLog.Logger logger = NLog.LogManager.GetLogger("product", type); return new NLogLog(logger); } }

NLog

/// <summary> /// Log适配器，将log4j和Nlog转换成为需要的ILog /// </summary> class NLogILogAdpater : ILogAdpater { public ILog GetLog(Type type) { NLog.Logger logger = NLog.LogManager.GetLogger("product", type); return new NLogLog(logger); } } /// <summary> /// NLog日志输出 /// </summary> class NLogLog : ILog { // NLog 日志 private NLog.Logger logger; public NLogLog(Logger logger) { // 1、创建日志 this.logger = logger; } public void Debug(string msg) { logger.Debug(msg); } public void Error(string msg) { logger.Error(msg); } public void Info(string msg) { logger.Info(msg); } public void Warn(string msg) { logger.Warn(msg); } }

日志工厂

/// <summary> /// 自定义日志输出 /// </summary> interface ILog { public void Debug(string msg); public void Info(string msg); public void Warn(string msg); public void Error(string msg); } /// <summary> /// Log适配器，将log4j和Nlog转换成为需要的ILog /// </summary> interface ILogAdpater { public ILog GetLog(Type type); } /// <summary> /// 日志工厂 /// </summary> class LogFactory { public ILog GetLog(string loggerFlag,Type type) { if ("log4net".Equals(loggerFlag)) { return new Log4NetLogAdpater().GetLog(type); } else if ("nlog".Equals(loggerFlag)) { return new NLogILogAdpater().GetLog(type); } return null; } }

节点中间件

/// <summary> /// 终结点中间件(外观模式) /// </summary> class EndpointMiddlewareFacde { private EndpointRouteBuilder endpointRouteBuilder; private EndpointRoute endpointRoute; private EndpointHandler endpointHandler; public EndpointMiddlewareFacde() { this.endpointRouteBuilder = new EndpointRouteBuilder(); this.endpointRoute = new EndpointRoute(); this.endpointHandler = new EndpointHandler(); } /// <summary> /// 执行请求 /// </summary> /// <param name="httpContext"></param> public void Invoke(HttpContext httpContext) { // 1、加载Controller endpointRouteBuilder.MapControllers();// 扫描所有Controller // 2、创建EndpointRoute Endpoint endpoint = endpointRoute.Match("/index"); // 3、执行Endpoint object result = endpointHandler.HandlerEndpoint(endpoint, new object[] { "原理解析" }); // 4、对结果进行处理(就是将数据输出到页面) ViewResult viewResult = (ViewResult)result; // 5、输出到页面 if (viewResult.ViewType.Equals("Razor")) { // 5.1 输出到Razor页面 RazorView razorView = new RazorView(); razorView.Render(viewResult.ViewData, httpContext); } else if (viewResult.ViewType.Equals("XML")) { // 5.2 输出到XML页面 XMLView xMLView = new XMLView(); xMLView.Render(viewResult.ViewData, httpContext); } } }

view相关

/// <summary> ///视图模板 /// </summary> abstract class AbstractView { /// <summary> /// 渲染方法 /// </summary> /// <param name="viewData"></param> /// <param name="httpContext"></param> public void Render(IDictionary<string, object> viewData, HttpContext httpContext) { // 1、转换成Razor数据 TransformData(viewData); // 2、构建Razor页面 BuildPage(viewData); // 3、输出Razor页面 WritePage(httpContext); } protected abstract void TransformData(IDictionary<string, object> viewData); protected abstract void BuildPage(IDictionary<string, object> viewData); protected abstract void WritePage(HttpContext httpContext); } /// <summary> /// 数据输出到页面,Razor页面，Asp页面 /// </summary> interface IView { /// <summary> /// 视图渲染 /// </summary> /// <param name="viewData"></param> /// <param name="httpContext"></param> public void Render(IDictionary<string,object> viewData,HttpContext httpContext); } /// <summary> /// Razor 视图页面 /// </summary> class RazorView : AbstractView { /* public void Render(IDictionary<string, object> viewData, HttpContext httpContext) { // 1、转换成Razor数据 TransformRazorData(viewData); // 2、构建Razor页面 BuildRazorPage(viewData); // 3、输出Razor页面 WritePazorPage(httpContext); }*/ protected override void TransformData(IDictionary<string, object> viewData) { Console.WriteLine($"将数据转换成Razor数据"); } protected override void BuildPage(IDictionary<string, object> viewData) { Console.WriteLine($"构造Razor页面"); } protected override void WritePage(HttpContext httpContext) { Console.WriteLine($"输出Razor页面"); } } /// <summary> /// Action执行结果 /// </summary> class ViewResult { // 1、页面需要数据 public IDictionary<string, object> ViewData { set; get; } // 2、视图名称 public string ViewName {set;get;} // 3、视图类型 public string ViewType { set; get; } } /// <summary> /// xml视图 /// </summary> class XMLView:AbstractView { /*public void Render(IDictionary<string, object> viewData, HttpContext httpContext) { // 1、转换成Razor数据 TransformXMLData(viewData); // 2、构建Razor页面 BuildXMLPage(viewData); // 3、输出Razor页面 WriteXMLPage(httpContext); }*/ protected override void TransformData(IDictionary<string, object> viewData) { Console.WriteLine($"将数据转换成Razor数据"); } protected override void BuildPage(IDictionary<string, object> viewData) { Console.WriteLine($"构造Razor页面"); } protected override void WritePage(HttpContext httpContext) { Console.WriteLine($"输出Razor页面"); } }