Discovering what is inside Sitecore HTML Cache

## HtmlCache.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HtmlCache.aspx.cs" Inherits="Sitecore.Utils.HtmlCacheList" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<body>
    <form id="form1" runat="server">
        <asp:Repeater ID="WebsiteCache" runat="server" ItemType="System.Tuple`2 [System.String, System.String]">
            <HeaderTemplate>
                <table>
            </HeaderTemplate>
            <ItemTemplate>
                <tr>
                    <td>
                        <asp:Label runat="server" ID="Key" Text='<%# Item.Item1 %>' />
                    </td>
                    <td>
                        <asp:Label runat="server" ID="Value" Text='<%# Item.Item2 %>' />
                    </td>
                </tr>
            </ItemTemplate>
            <FooterTemplate>
                </table>
            </FooterTemplate>
        </asp:Repeater>
    </form>
</body>
</html>

## HtmlCache.aspx.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Web;
using Sitecore.Caching;

namespace Sitecore.Utils
{
    public partial class HtmlCacheList : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            var websiteCache = GetCaches("website");
            WebsiteCache.DataSource = websiteCache;
            WebsiteCache.DataBind();
        }

        private List<Tuple<string, string>> GetCaches(string sitename)
        {
            var list = new List<Tuple<string, string>>();
            HtmlCache htmlCache = CacheManager.GetHtmlCache(Sitecore.Sites.SiteContextFactory.GetSiteContext(sitename));
            if (htmlCache != null)
            {
                FieldInfo fi = typeof (CustomCache).GetField("_cache", BindingFlags.NonPublic | BindingFlags.Instance);
                var cache = (Cache) fi.GetValue(htmlCache);

                var fi2 = typeof (Cache).GetField("data", BindingFlags.NonPublic | BindingFlags.Instance);
                var hashTable = (Hashtable) fi2.GetValue(cache);

                foreach (var cacheKey in hashTable.Keys)
                {
                    list.Add(new Tuple<string, string>(cacheKey.ToString(), HttpUtility.HtmlEncode(((Cache.CacheEntry) hashTable[cacheKey]).Data.ToString())));
                }
            }
            return list;
        }
    }
}

## HtmlCache.aspx.designer.cs
//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace Sitecore.Utils {


    public partial class HtmlCacheList {

        /// <summary>
        /// form1 control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.HtmlControls.HtmlForm form1;

        /// <summary>
        /// WebsiteCache control.
        /// </summary>
        /// <remarks>
        /// Auto-generated field.
        /// To modify move field declaration from designer file to code-behind file.
        /// </remarks>
        protected global::System.Web.UI.WebControls.Repeater WebsiteCache;
    }
}