asp.net-mvc - MVC 在呈现给用户之前更改响应的最后机会

Question

在呈现给用户之前，我需要更改完整的 html 响应流(使用 html 解析)。在哪里/什么时候是最后一次这样做的机会？

Answer 1

恕我直言，在 ASP.NET MVC 环境中更改 HTML 响应的更好方法是使用操作过滤器。这是用于压缩输出的操作过滤器的示例:

public class CompressFilter : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext 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);
        }
    }
}

您可以在您的操作方法中像这样使用它:

    [CompressFilter]
    // Minifies, compresses JavaScript files and stores the response in client (browser) cache for a day
    public JavaScriptResult GetJavaScript(string jsPath)

HTH