ActionFilterAttribute之CompressFilter,GZIP，DEFLATE压缩

最新推荐文章于 2022-04-13 21:21:51 发布

原创最新推荐文章于 2022-04-13 21:21:51 发布 · 2.2k 阅读

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#filter #string #class

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本文介绍如何通过设置Filter标签来启用Gzip和Deflate压缩技术，从而减少网站页面大小及带宽消耗。文中详细解释了根据客户端请求头中的Accept-Encoding字段来选择合适的压缩方式，并展示了具体的代码实现。

开启Gzip,Deflate压缩也会给减小网站页面大小，进而减小使用带宽，只需设置此Filter标签，便可实现．其中当页面出现错误时，会禁止压缩，以防用户看不到调式错误．

public class CompressFilter : ActionFilterAttribute { #region = IsAvailable = private bool _isavailable = true; public bool IsAvailable { get { return _isavailable; } set { _isavailable = value; } } #endregion public CompressFilter() { } public CompressFilter(bool isAvailable) { _isavailable = isAvailable; } public override void OnActionExecuting(ActionExecutingContext filterContext) { if (!IsAvailable) { base.OnActionExecuting(filterContext); return; } if (filterContext.HttpContext.IsCustomErrorEnabled) { 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); } } } }

配合HtmlFilter 使用，其乐无穷～！