Question

我希望使用下面的代码在我的项目中实现HTML压缩。

public class CompressFilter : ActionFilterAttribute {

public override void OnActionExecuting(FilterExecutingContext filterContext)
{
    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);
    }
}
}

但是，我在FilterExecutingContext上收到了错误消息。它显示错误，如code not found... 那么请给我一些建议我应该如何在我的项目中实现HTML压缩。还有其他任何建议请告诉我。

感谢。

Answer 1

OnActionExecuting的方法签名已更改为：

public override void OnActionExecuting(ActionExecutingContext filterContext)

将FilterExecutingContext替换为ActionExecutingContext。

请参阅MSDN。

Answer 2

为Accept编码添加验证。你使用了错误的字母大小写

接受编码，GZIP和DEFLATE

。请提供以下示例代码：

 if(Request.Headers["Accept-encoding"] != null &&
     Request.Headers["Accept-encoding"].Contains("gzip")) {
       Response.Filter = new GZipStream(Response.Filter, 
                         CompressionMode.Compress, true);
       Response.AppendHeader("Content-encoding", "gzip");
  }
  else if(Request.Headers["Accept-encoding"] != null &&
          Request.Headers["Accept-encoding"].Contains("deflate")) {
      Response.Filter = new DeflateStream(Response.Filter, 
                        CompressionMode.Compress, true);
      Response.AppendHeader("Content-encoding", "deflate");
  }

Courtsy http://www.codeproject.com/Articles/14761/HTTP-Compression-A-Quick-and-Dirty-Solution

使用“FilterExecutingContext”时出错，如何使用ActionFilterAttribute类的'OnActionExecuting'方法？

2 个答案: