ActionFilterAttribute之CompressFilter,GZIP，DEFLATE压缩

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～！