webapi使用压缩

支持GZIP、DEFLATE压缩

/// <summary>
    /// Gzip 压缩
    /// </summary>
    public sealed class CompressionFilter : IResultFilter
    {

        public void OnResultExecuted(ResultExecutedContext filterContext)
        {

        }

        public void OnResultExecuting(ResultExecutingContext filterContext)
        {
            string acceptEncoding = filterContext.HttpContext.Request.Headers["Accept-Encoding"];
            if (!String.IsNullOrEmpty(acceptEncoding))
            {
                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);
                }
            }
        }
    }