CompressFilterAttribute 文件压缩特性

    /// <summary>
    /// 文件压缩特性
    /// </summary>
    public class CompressFilterAttribute : ActionFilterAttribute
    {
        private bool isEnableCompression = true;

        /// <summary>
        /// 构造函数
        /// </summary>
        public CompressFilterAttribute()
        {
        }

        #region OnActionExecuting
        /// <summary>
        /// Action方法执行前执行的方法
        /// </summary>
        /// <param name="filterContext">ActionExecutingContext 对象</param>
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            if (filterContext.ActionDescriptor.IsDefined(typeof(NoCompress), false) || filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(NoCompress), false))
            {
                this.isEnableCompression = false;
            }
        }
        #endregion

        #region OnResultExecuted
        /// <summary>
        /// 返回结果集之后执行的方法
        /// </summary>
        /// <param name="filterContext">结果执行上下文</param>
        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            if (filterContext.HttpContext.Request.IsAjaxRequest())
            {
                return;
            }

            if (filterContext.Exception != null)
            {
                return;
            }

            if (this.isEnableCompression)
            {
                HttpRequestBase request = filterContext.HttpContext.Request;
                HttpResponseBase response = filterContext.HttpContext.Response;
                string acceptEncoding = request.Headers["Accept-Encoding"];

                if (acceptEncoding == null)
                {
                    return;
                }

                if (acceptEncoding.ToLower().Contains("gzip"))
                {
                    response.Filter = new GZipStream(response.Filter, CompressionMode.Compress);
                    response.AppendHeader("Content-Encoding", "gzip");
                }
                else if (acceptEncoding.ToLower().Contains("deflate"))
                {
                    response.Filter = new DeflateStream(response.Filter, CompressionMode.Compress);
                    response.AppendHeader("Content-Encoding", "deflate");
                }
            }
        #endregion
        }
    }

文件压缩特性和排除文件压缩特性的完美结合，相信可以让你满足需求。

排除文件压缩特性：NoCompress

  /// <summary>
    /// 不启用压缩特性
    /// </summary>
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
    public sealed class NoCompress : Attribute 
    {
    }