如何用FileSystemObject组件来做一个站内搜索？

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searchpage.htm
' 搜索页面.

<html>

<head>
<title>千花飞舞之站内搜索引擎</title>
</head>
<body>
<CENTER>
<FORM METHOD=POST ACTION="searchresult.asp">

<TABLE BGCOLOR="#BLUE" BORDER="0">
<tr>
<td ROWSPAN="3" BGCOLOR="#BLUE" width="21" nowrap></td>
<td width="363" nowrap> <FONT COLOR="#FFFFFF">
<INPUT TYPE="text" NAME="SearchText" SIZE="22">
<INPUT TYPE="checkbox" NAME="Case">
高度敏感</FONT> </td>
<td ROWSPAN="3" width="10">
<INPUT TYPE="submit" VALUE="搜索">
<P>
<INPUT TYPE="reset" VALUE="重写">
</td>
<td ROWSPAN="3" BGCOLOR="#BLUE" width="28"></td>
</tr>
<tr>

<td width="363" nowrap> <FONT COLOR="#FFFFFF"> 搜索返回结果
<select name="rLength" >
<option value="200" selected>详细信息</option>
<option value="100">简短信息</option>
<option value="0">只返回连接</option>
</select>
<select NAME="rResults">
<OPTION VALUE="10" selectED>10
<OPTION VALUE="25">25
<OPTION VALUE="50">50
</select>
</FONT>
</td>
</tr>
<tr>

<td width="363" nowrap> <FONT COLOR="#FFFFFF"> 必须包含:
        <INPUT TYPE="checkbox" NAME="iImage">图片
        <INPUT TYPE="checkbox" NAME="iZips">Zip格式
        <INPUT TYPE="checkbox" NAME="iJavaS"> javascript
</FONT>
</td>
</tr>
</TABLE>
</FORM>
</CENTER>
<DL>
</DL>
</body></html>

searchresult.asp
' 搜索结果.
<html>
<head>
<title>千花飞舞站内'<%=Request("SearchText")%>'之搜索结果</title>
</head>
<body>
<B>'<%=Request("SearchText")%>'的搜索结果</B><BR>
<%
Const fsoForReading = 1
Dim objFile, objFolder, objSubFolder, objTextStream
Dim bolCase, bolFileFound, bolTagFound
Dim strCount, strDeTag, strExt, strFile, strContent, strRoot, strTag, strText, strtitle, strtitleL
Dim reqImage, reqJavaS, reqLength, reqNumber, reqZip

strFile = ".asp .htm .html .js .txt .css"
strRoot = "/"
strText = Request("SearchText")
strTag = Chr(37) & Chr(62)
bolFileFound = False
bolTagFound = False
If Request("Case") = "on" Then bolCase = 0 Else bolCase = 1
If Request("iImage") = "on" Then reqImage = "<IMG" Else reqImage = ""
If Request("iZips") = "on" Then reqZips = ".zip" Else reqImage = ""
If Request("iJavaS") = "on" Then reqJavaS = "javascript" Else reqImage = ""
If Request("rResults") = "10" Then reqNumber = 10
If Request("rResults") = "25" Then reqNumber = 25
If Request("rResults") = "50" Then reqNumber = 50
reqLength = Request("rLength")

Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
Set objFolder = objFSO.GetFolder(Server.MapPath(strRoot))

schSubFol(objFolder)

Sub schSubFol(objFolder)
For Each objFile in objFolder.Files
If strCount + 1 > reqNumber or strText = "" Then Exit Sub
If Response.IsClientConnected Then
Set objTextStream = objFSO.OpenTextFile(objFile.Path,fsoForReading)

strContent = objTextStream.ReadAll

If InStr(1, strContent, strTag, bolCase) Then
Else
If Mid(objFile.Name, Len(objFile.Name) - 1, 1) = "." Then strExt = Mid(objFile.Name, Len
(objFile.Name) - 1, 2)
If Mid(objFile.Name, Len(objFile.Name) - 2, 1) = "." Then strExt = Mid(objFile.Name, Len
(objFile.Name) - 2, 3)
If Mid(objFile.Name, Len(objFile.Name) - 3, 1) = "." Then strExt = Mid(objFile.Name, Len
(objFile.Name) - 3, 4)
If Mid(objFile.Name, Len(objFile.Name) - 4, 1) = "." Then strExt = Mid(objFile.Name, Len
(objFile.Name) - 4, 5)
If InStr(1, strContent, strText, bolCase) And _
InStr(1, strContent, reqImage, 1) And _
InStr(1, strContent, reqZips, 1) And _
InStr(1, strContent, reqJavaS, 1) And _
Instr(1, strFile, strExt, 1) Then
If InStr(1, strContent, "<title>", 1) Then strtitle = Mid(strContent, InStr(1, strContent, "<title>", 1) + 7, InStr(1, strContent, "</title>", 1)) Else strtitle = "未命名"
strCount = strCount + 1
Response.Write "<DL><DT><B><I>"& strCount &"</I></B> - <A HREF=" & objFile.Path & ">"
& strtitle & "</A></A></DT><BR><DD>"
strtitleL = InStr(1, strContent, "</title>", 1) - InStr(1, strContent, "<title>", 1) +7

strDeTag = ""
bolTagFound = False

Do While InStr(strContent, "<")
bolTagFound = True
strDeTag = strDeTag & " " & Left(strContent, InStr(strContent, "<") - 1)
strContent = MID(strContent, InStr(strContent, ">") + 1)
Loop

strDeTag = strDeTag & strContent
If Not bolTagFound Then strDeTag = strContent

If reqLength = "0" Then Response.Write objFile.Path & "</DD></DL>" Else Response.Write
Mid(strDeTag, strtitleL, reqLength) & "...<BR><b><FONT SIZE='2'>URL: " & objFile.Path & " - 上次修改时
间: " & objFile.DateLastModified & " - " & FormatNumber(objFile.Size / 1024)
& "Kbytes</FONT></b></DD></DL>"
bolFileFound = True
End If
objTextStream.Close
End If
End If
Next
End Sub

For Each objSubFolder in objFolder.SubFolders
schSubFol(objSubFolder)
Next

If Not bolFileFound then Response.Write "抱歉,没有找到您要搜索的结果!"
If bolFileFound then Response.Write "<B>搜索结束</B>"

Set objTextStream = Nothing
Set objFolder = Nothing
Set objFSO = Nothing
%>
</body></html>