压缩响应无效

Question

我想在我的Asp.Net网站中压缩响应。我写了这段代码：

public static void CompressPage(HttpRequest Request, HttpResponse Response)
{
    string acceptEncoding = Request.Headers["Accept-Encoding"];
    Stream prevUncompressedStream = Response.Filter;

    if (acceptEncoding.IsEmpty())
    {
        return;
    }

    acceptEncoding = acceptEncoding.ToLower();

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

并称之为Page_Load事件：

protected void Page_Load(object sender, EventArgs e)
{
    ...
    ZipHtmlPage.CompressPage(Request, Response);
}

问题是当我运行有无上述代码的代码时Page_Load，响应的大小不会改变。

问题出在哪里？

谢谢

---

编辑1）

我认为这"Content-Encoding", "gzip"不会增加标题：

不知道为什么

---

编辑2）

当我HttpModule用于执行http压缩时：

public class CompressModule : IHttpModule
{
    public void Init(HttpApplication application)
    {
        application.BeginRequest += (new EventHandler(this.Application_BeginRequest));
    }

    private void Application_BeginRequest(Object source, EventArgs e)
    {
        HttpContext context = HttpContext.Current;
        context.Response.Filter = new GZipStream(context.Response.Filter, CompressionMode.Compress);
        HttpContext.Current.Response.AppendHeader("Content-Encoding", "gzip"); 
    }
    public void Dispose()
    {
    }
}

我在每一页中都得到了这个：

Answer 1

您是否将这些代码添加到您的 web.config 文件（对于 css 和 javascript 文件）：

<system.webServer>
    <httpCompression directory="%SystemDrive%\inetpub\temp\IIS Temporary Compressed Files">
      <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" staticCompressionLevel="9" />
      <dynamicTypes>
        <add mimeType="text/*" enabled="true" />
        <add mimeType="message/*" enabled="true" />
        <add mimeType="application/x-javascript" enabled="true" />
        <add mimeType="application/json" enabled="true" />
        <add mimeType="*/*" enabled="false" />
      </dynamicTypes>
      <staticTypes>
        <add mimeType="text/*" enabled="true" />
        <add mimeType="message/*" enabled="true" />
        <add mimeType="application/x-javascript" enabled="true" />
        <add mimeType="application/atom+xml" enabled="true" />
        <add mimeType="application/xaml+xml" enabled="true" />
        <add mimeType="*/*" enabled="false" />
      </staticTypes>
    </httpCompression>
...

也许这个链接可以帮助您 如何在 ASP.NET 中实现 GZip 压缩？