我有一个简单的 aspx 页面。这是它的顶部：-
<%@ Page
Language="C#"
AutoEventWireup="true"
CodeFile="Foo.aspx.cs"
Inherits="Foo" %>
<%@ OutputCache Duration="3600" VaryByParam="none" Location="Any" %>
现在，每次我在 FireFox 中点击页面（点击 F5 或在 url 栏中点击 enter）我都会收到 200 OK 响应。这是来自 FireBug 的示例回复：-
请求标头：-
GET /sitemap.xml HTTP/1.1
Host: localhost.foo.com.au
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2)
Gecko/20100115 Firefox/3.6
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-au,en-gb;q=0.7,en;q=0.3
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 115
Connection: keep-alive
Cookie: <snipped>
If-Modified-Since: Tue, 01 Jun 2010 07:35:17 GMT
If-None-Match: ""
Cache-Control: max-age=0
响应标头：-
HTTP/1.1 200 OK
Cache-Control: public
Content-Type: text/xml; charset=utf-8
Expires: Tue, 01 Jun 2010 08:35:17 GMT
Last-Modified: Tue, 01 Jun 2010 07:35:17 GMT
Etag: ""
Server: Microsoft-IIS/7.5
X-Powered-By: UrlRewriter.NET 2.0.0
X-AspNet-Version: 4.0.30319
Date: Tue, 01 Jun 2010 07:35:20 GMT
Content-Length: 775
Firebug 缓存选项卡：-
Last Modified Tue Jun 01 2010 17:35:20 GMT+1000 (AUS Eastern Standard Time)
Last Fetched Tue Jun 01 2010 17:35:20 GMT+1000 (AUS Eastern Standard Time)
Expires Tue Jun 01 2010 18:35:17 GMT+1000 (AUS Eastern Standard Time)
Data Size 775
Fetch Count 105
Device disk
现在，如果我使用请求生成器在 Fiddler 中尝试它（并且没有额外的数据），我也会不断收到相同的 200 OK 回复。
请求标头：-
GET http://localhost.foo.com.au/sitemap.xml HTTP/1.1
User-Agent: Fiddler
Host: foo.com.au
响应标头：-
HTTP/1.1 200 OK
Cache-Control: public
Content-Type: text/xml; charset=utf-8
Expires: Tue, 01 Jun 2010 07:58:00 GMT
Last-Modified: Tue, 01 Jun 2010 06:58:00 GMT
ETag: ""
Server: Microsoft-IIS/7.5
X-Powered-By: UrlRewriter.NET 2.0.0
X-AspNet-Version: 4.0.30319
Date: Tue, 01 Jun 2010 06:59:16 GMT
Content-Length: 775
看起来它要求缓存它，但它不是:(
服务器是 Win7 上的 localhost IIS7.5。（如响应数据中所列）。
谁能看到我做错了什么？