netcore mvc 的简单实现

• 实现的功能

  • 简单的路由系统
  • 支持中间件
  • 简单Filter支持
  • 只支持HttpPost、HttpGet
  • 使用Dotliquid做为视图渲染引擎

• 核心实现

  • HttpChannel

    • 复制监听Tcp请求，并按照Http协议将tcp数据传输解析为HttpRequest数据实例，解析完调用HttpHandler继续下一步处理

  • HttpRequest

    • 单次Http请求信息，包含 HttpMethod、Version、Url、HttpHeader、Cookies等信息

  • HttpResponse

    • Http响应信息

  • DefaultHttpHandler

    • 实现IHttpHandler，负责Middleware责任链的创建、执行

    •   private IMiddleware BuildMiddlewareChain()
        {
            var builder = new MiddlewareChainBuilder();
            builder.Use(new StaticFileMiddleware());
            builder.Use(new MvcMiddleware(route));
            return builder.Build();
        }
      
      
        public async Task ProcessAsync(HttpRequest httpRequest)
        {
            var chain = BuildMiddlewareChain();
            return await chain.Invoke(httpRequest);
        }

  • MvcMiddleware

    • 内置的中间件，mvc功能具体实现[FIlter模式实现]

    • public override async Task Invoke(HttpRequest httpRequest)
      {
          try
          {
              var context = new ActionExecuteContext
              {
                  HttpRequest = httpRequest
              };
      
              var (controller, methodInfo, parameter) = route.Route(httpRequest);
              if (controller == null)
              {
                  return await HttpResponseHelper.CreateNotFoundResponseAsync();
              }
      
              context.Controller = controller;
              context.Action = methodInfo;
              ((ControllerBase)controller).Request = httpRequest;
      
              var filterList = GetFilters(controller, methodInfo);
              var stack = new Stack();
              for (var i = 0; i < filterList.Count; i++)
              {
                  var filter = filterList[i];
                  await filter.OnActionExecutingAsync(context);
                  if (context.Final)
                  {
                      return context.HttpResponse;
                  }
                  stack.Push(filter);
              }
      
              await controller.OnActionExecutingAsync(context);
      
              if (context.Final)
              {
                  return context.HttpResponse;
              }
      
              var parameters = new List