标签:style blog http color io 使用 ar sp div
1、实现缓存保存在本地机制 缓存在开发高扩充性WEB程序的时候扮演着很重要的角色.我们可以将HTTP请求在一个定义的时间内缓存在用户的浏览器中,如果用户在定义的时间内请求同 一个URL,那么用户的请求将会从用户浏览器的缓存中加载,而不是从服务器.你可以在ASP.NET MVC应用程序中使用下面的Action Filter来实现同样的事情:
1 using System; using System.Web; 2 using System.Web.Mvc; 3 public class CacheFilterAttribute : ActionFilterAttribute { 4 /// /// Gets or sets the cache duration in seconds. The default is 10 seconds. 5 /// /// The cache duration in seconds. 6 public int Duration { get; set; } 7 public CacheFilterAttribute() { Duration = 10; } 8 public override void OnActionExecuted(FilterExecutedContext filterContext) { 9 if (Duration <= 0) 10 return; 11 HttpCachePolicyBase cache = filterContext.HttpContext.Response.Cache;
TimeSpan cacheDuration = TimeSpan.FromSeconds(Duration);
cache.SetCacheability(HttpCacheability.Public);
cache.SetExpires(DateTime.Now.Add(cacheDuration));
cache.SetMaxAge(cacheDuration); 12 cache.AppendCacheExtension("must-revalidate, proxy-revalidate");
}
}
2、另外一个很重要的事情就是压缩.现在的浏览器都可以接收压缩后的内容,这可以节省大量的带宽.你可以在你的ASP.NET MVC 程序中应用下面的Action Filter 来压缩你的Response :
using System.Web; using System.Web.Mvc; public class CompressFilter : ActionFilterAttribute { public override void OnActionExecuting(FilterExecutingContext filterContext) { HttpRequestBase request = filterContext.HttpContext.Request; string acceptEncoding = request.Headers["Accept-Encoding"]; if (string.IsNullOrEmpty(acceptEncoding)) return; acceptEncoding = acceptEncoding.ToUpperInvariant(); HttpResponseBase response = filterContext.HttpContext.Response; if (acceptEncoding.Contains("GZIP")) { response.AppendHeader("Content-encoding", "gzip"); response.Filter = new GZipStream(response.Filter, CompressionMode.Compress); } else if (acceptEncoding.Contains("DEFLATE")) { response.AppendHeader("Content-encoding", "deflate");
response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress); } } }
标签:style blog http color io 使用 ar sp div
原文地址:http://www.cnblogs.com/weilai1917/p/4008757.html