怎么用asp做全文检索?给点思路也好

ebombsuhocom 2003-08-22 06:10:49

我要做一个ASP全文搜索，搜索的内容即有目前存在的网页，也有数据库里的东西（把网页的源文件放到了数据库里），有什么好点的方法？或者是那方有些书可以参考一下。

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凯晰叶子 2003-08-23

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用ASP建立站内搜索
（一），首先利用access97建立一个名为list.mdb的数据库，在里面建立一个名为list的表，然后在list表里面输入一些你想要被查询的文件名字，关键的搜索词还有相对应的链接，下面建立了四个项目ID（编号），title（主题），word（关键词），url（链接地址），如下表所示：IDtitle
word
url
1
cgi教程本地调试cgicgi/testcgi.htm
2
下载中心聊天室，留言本
download/index.htm （二），建立了数据库以后就可以建立你的asp搜索页面了，下面是一个文件名为search.htm的asp搜索页面的源程序，这个搜索引擎可以同时搜索title和word里面的内容，当然如果你有需要的话可以建立更多的搜索： 
<% "建立数据库的连接
con="DBQ="+server.mappath("list.mdb")+";DefaultDir=;DIRVER={microsoft Access Driver(*.mdb)};"
"建立CONNECTION对象并打开数据库
set mycon=server.createobject("ADODB.CONNECTION")
mycon.open.con %>
"创建Recordset对象的例程，打开Recordset对象传递SQL串以及所有的连接信息
<% set rs=server.createobject("ADODB.Recordset")
rs.open "SELECT*FORM list where title and word like '%'&request.form("word")&"%'",MyCon,adOpenStatie
%>
"建立查询后的显示信息和查询页面,你想取什么名字都可以
<html><head><title>查询结果</title></head>
<body bgcolor="#ffffff">
<p align="center"><br>
"统计查询共有<% Response.Write(RS.RecordCount) %>条纪录</p><br>
<div align="center"><center>
<table border="1" align="center" bordercolor="000000" berdorcoorlight="#000000" bordercolordark="#ffffff">
<tr align="center">
<td width="20%" align="center" bgcolor="#ffffff">ID</td>
<td width="60%" align="center" bgcolor="#ffffff">主题</td>
<td width="20%" align="center" bgcolor="#ffffff">查看</td></table>
<table border="1" align="center" bordercolor="000000" berdorcoorlight="#000000" bordercolordark="#ffffff">
<tr align="center">

<% while not rs.eof %>
<tr align="center">
<td width="20%" align="center" bgcolor="#ffffff"><% =rs("id") %></td>
<td width="60%" align="center" bgcolor="#ffffff"><% =rs("title") %></td>
<td width="20%" align="center" bgcolor="#ffffff"><a href="<% =rs("url") %>">GO</a></td>
<% rs.movenext %></tr> <% wend %></table></center></div><% rs.close %>
<% mycon.close %>
"关闭链接
</body></html>
下面我们来建立搜索页面
<html><head><title>搜索页面</title></head>

<from method="POST" action="search.asp">
<div align="center"><center><p><input type="text" name="word" size="30">
<input type="submit" value="提交" name="B1"><input type="reset" value="清除" name="B2"></p>
</center></div></form>
<hr width="600" align="center">
<html>
好了，这个站内搜索引擎到这里就算完成了，你接下来要做的就是吧东西输入数据库了！

凯晰叶子 2003-08-23

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<%
Response.Buffer=True

Const ValidFiles = "htmltxt"
Const RootFld = "./"

Dim Matched
Dim Regex
Dim GetTitle
Dim fs
Dim rfLen
dim RootFolder
Dim DocCount
Dim DocMatchCount
Dim MatchedCount

' ----------------------------------------------
' Procedure: SearchFiles()
' ----------------------------------------------
Public Sub SearchFiles(FolderPath)
Dim fsFolder
Dim fsFolder2
Dim fsFile
Dim fsText
Dim FileText
Dim FileTitle
Dim FileTitleMatch
Dim MatchCount
Dim OutputLine

' Get the starting folder
Set fsFolder = fs.GetFolder(FolderPath)
' Iterate thru every file in the folder
For Each fsFile In fsFolder.Files
' Compare the current file extension with the list of valid target files
If InStr(1, ValidFiles, Right(fsFile.Name, 3), vbTextCompare) > 0 Then
DocCount = DocCount + 1
' Open the file to read its content
Set fsText = fsFile.OpenAsTextStream
FileText = fsText.ReadAll
' Apply the regex search and get the count of matches found
MatchCount = Regex.Execute(FileText).Count
MatchedCount = MatchedCount + MatchCount
If MatchCount > 0 Then
DocMatchCount = DocMatchCount + 1
' Apply another regex to get the html document's title
Set FileTitleMatch = GetTitle.Execute(FileText)
If FileTitleMatch.Count > 0 Then
' Strip the title tags
FileTitle = Trim(replace(Mid(FileTitleMatch.Item(0),8),"</title>","",1,1,1))
' In case the title is empty
If FileTitle = "" Then
FileTitle = "No Title (" & fsFile.Name & ")"
End If
Else
' Create an alternate entry name (if no title found)
FileTitle = "No Title (" & fsFile.Name & ")"
End If
' Create the entry line with proper formatting
' Add the entry number
OutputLine = "  <b>" & DocMatchCount & ".</B> "
' Add the document name and link
OutputLine = OutputLine & "<A href=" & chr(34) & RootFld & replace(Mid(fsFile.Path,
rfLen),"\","/") & chr(34) & "><B>"
OutputLine = OutputLine & FileTitle & "</B></a>"
' Add the document information
OutputLine = OutputLine & "<font size=1><br>  Criteria matched " & MatchCount
& " times - Size: "
OutputLine = OutputLine & FormatNumber(fsFile.Size / 1024,2 ,-1,0,-1) & "K bytes"
OutputLine = OutputLine & " - Last Modified: " & formatdatetime
(fsFile.DateLastModified,vbShortDate) & "</Font><br>"
' Display entry
Response.Write OutputLine
Response.Flush
End If
fsText.Close
End If
Next

' Iterate thru each subfolder and recursively call this procedure
For Each fsFolder2 In fsFolder.SubFolders
SearchFiles fsFolder2.Path
Next

Set FileTitleMatch = Nothing
Set fsText = Nothing
Set fsFile = Nothing
Set fsFolder2 = Nothing
Set fsFolder = Nothing
End Sub

' ----------------------------------------------
' Procedure: Search()
' ----------------------------------------------
Sub Search(SearchString)
Dim i
Dim fKeys
Dim fItems

Set fs = CreateObject("Scripting.FileSystemObject")
Set GetTitle = New RegExp
Set Regex = New RegExp

With Regex
.Global = True
.IgnoreCase = True
.Pattern = Trim(SearchString)
End With
With GetTitle
.Global = False
.IgnoreCase = True
.Pattern = "<title>(.|\n)*</title>"
End With

RootFolder = Server.MapPath(RootFld)

If Right(RootFld,1) <> "/" Then
RootFld = RootFld & "/"
End If

If Right(RootFolder, 1) <> "\" Then
RootFolder = RootFolder & "\"
End If
rfLen = Len(RootFolder) + 1

SearchFiles RootFolder

If MatchedCount = 0 Then
Response.Write "  <B>No Matches Found.</b><BR>"
End If

Set Regex = Nothing
Set GetTitle = Nothing
Set fs = Nothing

End Sub

%>
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta http-equiv="Content-Language" content="en-us">
<TITLE>OneFile Search 1.0</TITLE>
</HEAD>
<body bgcolor="#FFFFFF" link="#660000" vlink="#008000">
<Font Face="Tahoma,Arial" Size="2">
<table border="0" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td width="100%" colspan="2"></td>
</tr>
<tr>
<td width="50%" bgcolor="#000000">
<Form method="Get">
<table border="0" width="100%">
<tr>
<td width="33%" align="right"><font color="#FFFFFF" size="2" face="Tahoma,Arial"><b>Search
for </b></font></td>
<td width="33%"><input type="text" size="20" value="<%=Request.QueryString("query")%>"
name="query"></td>
<td width="34%"><input type="submit" name="Search" Value="Search"></td>
</tr>
</table>
</Form>
</td>
<td width="50%" bgcolor="#000000"></td>
</tr>
<tr>
<td width="100%" colspan="2" bgcolor="#000000"></td>
</tr>
<tr>
<td width="50%" bgcolor="#808080">
<table border="0" width="100%">
<tr>
<td width="33%" align="right"><font face="Tahoma,Arial" size="1"
color="#FFFFFF"><b>Tip:</b></font></td>
<td width="67%"><font color="#FFFFFF" face="Tahoma,Arial" size="1">Search by using <a
href="http://msdn.microsoft.com/scripting/default.htm /scripting/VBScript/doc/jsgrpregexpsyntax.htm">Regula
r Expresions</a>.</font></td>
</tr>
</table>
</td>
<td width="50%" bgcolor="#808080"></td>
</tr>
</table>

<%
If Trim(Request.QueryString("query")) <> "" Then
%>
<hr>
<table border="0" width="100%" bgcolor="#808080" cellspacing="0" cellpadding="0">
<tr>
<td width="100%"><Font Color="#FFFFFF" Size="2">  Your search for <B><%
=Request.QueryString("query")%></B> found the following documents:</Font></td>
</tr>
</table>
<BR><BR>
<%
Response.Flush
Search Request.QueryString("query")
If DocCount > 0 Then
%>
<BR>
<Font Size=1>
  (The search criteria "<%=Request.QueryString("query")%>" found <%=MatchedCount%> times in <%
=DocMatchCount%> of <%=DocCount%> documents.)
</font>
<%
End If
End If
%>
<BR><BR>
<hr><div align="center">
<Font size=1>
OneFile Search Engine v1.0<br>
Copyright 000 <a href="mailto:sixtos@prtc.net">Sixto Luis Santos</a>.
All Rights Reserved
</Font></div>

</Font>
</body>
</html>

<%
Response.End
%>

fuzq 2003-08-23