/// <summary> /// 利用指定的缓存策略提供程序创建 HtmlCacheableAttribute 对象。 /// </summary> /// <param name="policyProviderType">缓存策略提供程序类型</param> public CacheableAttribute(Type policyProviderType) { if (policyProviderType.IsSubclassOf(typeof(IMvcCachePolicyProvider))) { CachePolicyProvider = Activator.CreateInstance(policyProviderType).CastTo <IMvcCachePolicyProvider>(); return; } else if (policyProviderType.IsSubclassOf(typeof(ICachePolicyProvider))) { CachePolicyProvider = new MvcCachePolicyProviderWrapper(Activator.CreateInstance(policyProviderType).CastTo <ICachePolicyProvider>()); return; } throw new InvalidOperationException("配置错误,类型必须从 IHtmlCachePolicyProvider 或 IMvcCachePolicyProvider 派生"); }
/// <summary> /// 获取缓存策略 /// </summary> /// <param name="context">MVC 请求上下文</param> /// <returns></returns> protected override CachePolicy CreateCachePolicy(ControllerContext context, ActionDescriptor action, IDictionary <string, object> parameters) { if (CachePolicyProvider != null) { return(CachePolicyProvider.CreateCachePolicy(context, action, parameters)); } var httpMethod = context.HttpContext.Request.HttpMethod; if (!httpMethod.EqualsIgnoreCase("get") && !httpMethod.EqualsIgnoreCase("header"))//如果不是GET或Header请求,都不予缓存。 { return(null); } var provider = context.Controller as IMvcCachePolicyProvider; if (provider == null) { var _provider = context.Controller as ICachePolicyProvider; if (_provider != null) { provider = new MvcCachePolicyProviderWrapper(_provider); } } var policy = provider.CreateCachePolicy(context, action, parameters); if (policy != null) { return(policy); } return(MvcEnvironment.CreateCachePolicy(context, action, parameters)); }