using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.IO;
namespace HttpModules
{
public class MOSSCleanupFilter : Stream
{
   private static string[] completeTagsToCleanup = new string[] 
   {
      "<meta name=\"GENERATOR\" content=\"Microsoft SharePoint\" />",
      "<input type=\"hidden\" name=\"__SPSCEditMenu\" id=\"__SPSCEditMenu\" value=\"true\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOWebPartPage_PostbackSource\" id=\"MSOWebPartPage_PostbackSource\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOTlPn_SelectedWpId\" id=\"MSOTlPn_SelectedWpId\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOTlPn_View\" id=\"MSOTlPn_View\" value=\"0\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOTlPn_ShowSettings\" id=\"MSOTlPn_ShowSettings\" value=\"False\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOGallery_SelectedLibrary\" id=\"MSOGallery_SelectedLibrary\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOGallery_FilterString\" id=\"MSOGallery_FilterString\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOTlPn_Button\" id=\"MSOTlPn_Button\" value=\"none\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOAuthoringConsole_FormContext\" id=\"MSOAuthoringConsole_FormContext\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOAC_EditDuringWorkflow\" id=\"MSOAC_EditDuringWorkflow\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOSPWebPartManager_DisplayModeName\" id=\"MSOSPWebPartManager_DisplayModeName\" value=\"Browse\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOWebPartPage_Shared\" id=\"MSOWebPartPage_Shared\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOLayout_LayoutChanges\" id=\"MSOLayout_LayoutChanges\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOLayout_InDesignMode\" id=\"MSOLayout_InDesignMode\" value=\"\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOSPWebPartManager_OldDisplayModeName\" id=\"MSOSPWebPartManager_OldDisplayModeName\" value=\"Browse\" />"+System.Environment.NewLine,
      "<input type=\"hidden\" name=\"MSOSPWebPartManager_StartWebPartEditingName\" id=\"MSOSPWebPartManager_StartWebPartEditingName\" value=\"false\" />"+System.Environment.NewLine,
      "_spBodyOnLoadWrapper();",
   };

   private static string[] tagsToCleanup = new string[] 
   {
      "<link rel=\"stylesheet\" type=\"text/css\" href=\"/_layouts/1033/styles/core.css?rev=",
      "<link rel=\"stylesheet\" type=\"text/css\" href=\"/Style%20Library/en-US/Core%20Styles/Band.css",
      "<link rel=\"stylesheet\" type=\"text/css\" href=\"/Style%20Library/en-US/Core%20Styles/Controls.css",
      "<link rel=\"stylesheet\" type=\"text/css\" href=\"/_layouts/1033/styles/HtmlEditorCustomStyles.css?rev=",
      "<link rel=\"stylesheet\" type=\"text/css\" href=\"/_layouts/1033/styles/HtmlEditorTableFormats.css?rev=",
      "<input type=\"hidden\" name=\"__REQUESTDIGEST\" id=\"__REQUESTDIGEST\"",
      "<input type=\"hidden\" name=\"__VIEWSTATE\" id=\"__VIEWSTATE\" value=",
   };

   private static string[] scriptsToCleanup = new string[] 
   {
      "<script type=\"text/javascript\" language=\"javascript\" src=\"/_layouts/1033/core.js?rev=",
      "<script src=\"/WebResource.axd?",
      "<script> var MSOWebPartPageFormName = 'aspnetForm'",
      "<script type=\"text/javascript\" language=\"javascript\" src=\"/_layouts/1033/init.js?rev=",
      "<script type=\"text/javascript\" language=\"javascript\" src=\"/_layouts/1033/init.js?rev=",
      "<script type=\"text/javascript\" language=\"javascript\" src=\"/_layouts/portal.js?rev=",
      "<script type=\"text/javascript\" language=\"javascript\" src=\"/_layouts/1033/ie55up.js?rev=",
      "<script type=\"text/javascript\" language=\"javascript\" src=\"/_layouts/1033/non_ie.js?rev=",
      "<script type=\"text/javascript\">"+System.Environment.NewLine+"<!--"+System.Environment.NewLine+"var __wpmExportWarning",
      "<script type=\"text/JavaScript\" language=\"JavaScript\">"+System.Environment.NewLine+"<!--"+System.Environment.NewLine+"var L_Menu_BaseUrl",
   };

   private Stream responseStream;
   private long position;

   public MOSSCleanupFilter(Stream inputStream)
   {
      this.responseStream = inputStream;
   }

   public override void Write(byte[] buffer, int offset, int count)
   {
      StringBuilder html = new StringBuilder(System.Text.UTF8Encoding.UTF8.GetString(buffer, offset, count));
      foreach(string completeTagToClean in completeTagsToCleanup) 
      {
         this.CleanUp(html, completeTagToClean);
      }

      foreach (string tagToClean in tagsToCleanup)
      {
         this.CleanUp(html, tagToClean, ">");
      }

      foreach (string scriptToClean in scriptsToCleanup)
      {
         this.CleanUp(html, scriptToClean, "</script>");
      }

      byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(html.ToString());
      responseStream.Write(data, 0, data.Length);
   }

   private void CleanUp(StringBuilder html, string search, string endTag)
   {
      int startPos = html.ToString().IndexOf(search);
      if (startPos != -1)
      {
         if (!string.IsNullOrEmpty(endTag))
         {
            int endPos = html.ToString().IndexOf(endTag, startPos);
            if (endPos != -1)
            {
               html.Remove(startPos, endPos - startPos + endTag.Length);
            }
         }
         else
         {
            html.Remove(startPos, search.Length);
         }
      }
   }

   private void CleanUp(StringBuilder html, string search)
   {
      this.CleanUp(html, search, null);
   }

   #region Filter overrides
   
   public override bool CanRead
   {
      get
      {
         return true;
      }
   }

   public override bool CanSeek
   {
      get
      {
         return true;
      }
    }

   public override bool CanWrite
   {
      get
      {
         return true;
      }
   }

   public override void Close()
   {
      responseStream.Close();
   }

   public override void Flush()
   {
      responseStream.Flush();
   }

   public override long Length
   {
      get
      {
         return 0;
      }
   }

   public override long Position
   {
      get
      {
         return position;
      }
      set
      {
         position = value;
      }
   }

   public override long Seek(long offset, SeekOrigin origin)
   {
      return responseStream.Seek(offset, origin);
   }

   public override void SetLength(long length)
   {
      responseStream.SetLength(length);
   }

   public override int Read(byte[] buffer, int offset, int count)
   {
      return responseStream.Read(buffer, offset, count);
   }
   #endregion
   }
}

web.config: