MVC全局过滤器-流压缩输出

怼烎@ 2022-05-16 00:38 173阅读 0赞

using System.IO.Compression;
    using System.Web.Mvc;
    
    namespace LK.Web.Helpers
    {
        public class GZipCompressAttribute : ActionFilterAttribute
        {
            public override void OnActionExecuting(ActionExecutingContext filterContext)
            {
                //base.OnActionExecuting(filterContext);
    
                if (filterContext.IsChildAction)
                {
                    return;
                }
    
                var acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
                if (string.IsNullOrEmpty(acceptEncoding))
                {
                    return;
                }
    
                acceptEncoding = acceptEncoding.ToLower();
                var 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);
                }
            }
        }
    }

在filterconfig.cs文件中进行注册即可

/// <summary>
        /// 默认过滤器
        /// </summary>
        public class FilterConfig
        {
            /// <summary>
            /// 注册过滤器
            /// </summary>
            public static void RegisterGlobalFilters(GlobalFilterCollection filters)
            {
                ...
                filters.Add(new GZipCompressAttribute());
            }
        }

然后global.cs文件中注入

...
    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    ...