批量抓取某个列表页的教程分享
本篇文章介绍了批量抓取某个列表页的教程分享，下面我们就来看看详细的教程，需要的朋友可以参考下。
有些人当抓取程序是个宝，到目前还TND有人在卖钱，强烈BS一下这些家伙 真是的！可能偶下边这段东西比较烂哈
下边这个没有写入库功能，已经到这一步了，入库功能是很简单的事了，需要的请自己去完成吧，其它功能各位自行完善吧！把代码拷贝过去直接运行即可看到效果
Dim Url,List_PageCode,Array_ArticleID,i,ArticleID
Dim Content_PageCode,Content_TempCode
Dim Content_CategoryID,Content_CategoryName,BorderID,ClassID,BorderName,ClassName
Dim ArticleTitle,ArticleAuthor,ArticleFrom,ArticleContent
Url = "http://www.webasp.net/article/class/1.htm"
List_PageCode = getHTTPPage(Url)
List_PageCode = RegExpText(List_PageCode,"打印","
List_PageCode = RegExpText(List_PageCode," '取得当前列表页的文章链接，以,分隔
Array_ArticleID = Split(List_PageCode,",") '创建数组，存储文章ID
For i=0 To Ubound(Array_ArticleID)-1
ArticleID = Array_ArticleID(i) '文章ID
Content_PageCode = getHTTPPage("http://www.webasp.net/article/"&ArticleID) '取得文章页的内容
'=========取文章分类及相关ID参数 开始=======================
Content_TempCode = RegExpText(Content_PageCode,"技术教程 >> ",">> 内容",0)
Content_CategoryID = RegExpText(Content_PageCode,"",1)
BorderID = Split(Content_CategoryID,",")(0) '大类ID
ClassID = Split(Content_CategoryID,",")(1) '子类ID
'==========检查大类是否存在 开始===============
'如果不存在则入库
'==========检查大类是否存在 结束===============
'Response.Write(BorderID & "," & ClassID & "
")
Content_CategoryName = RegExpText(Content_PageCode,"/'>","",1)
BorderName = Split(Content_CategoryName,",")(0) '大类名称
ClassName = Split(Content_CategoryName,",")(1) '子类名称
'==========检查子类是否存在 开始===============
'如果不存在则入库
'==========检查子类是否存在 结束===============
'=========取文章分类及相关ID参数 结束=======================
'=========取文章标题及内容 开始=============================
ArticleTitle = RegExpText(Content_PageCode,"","",0)
ArticleAuthor = RegExpText(Content_PageCode," 作者：","",0)
ArticleFrom = RegExpText(Content_PageCode," 来源：","",0)
ArticleContent = RegExpText(Content_PageCode,"",""&VBCrlf&" "&VBCrlf&" ",0)
'=========取文章标题及内容 结束=============================
Response.Write(ArticleTitle& "
")
Response.Flush()
Next
附几个函数：
IF(IsObjInstalled("Microsoft.XMLHTTP") = False)THEN
Response.Write "
服务器不支持Microsoft.XMLHTTP组件"
Err.Clear
Response.End
END IF
On Error Resume Next
Dim http
SET http=Server.CreateObject("Msxml2.XMLHTTP")
Http.open "GET",url,False
Http.send()
IF(Http.readystate4)THEN
Exit Function
END IF
getHTTPPage=BytesToBSTR(Http.responseBody,"GB2312")
SET http=NOTHING
IF(Err.number0)THEN
Response.Write "
获取文件内容出错"
'Response.End
Err.Clear
END IF
End Function
Function BytesToBstr(CodeBody,CodeSet)
Dim objStream
SET objStream = Server.CreateObject("adodb.stream")
objStream.Type = 1
objStream.Mode =3
objStream.Open
objStream.Write CodeBody
objStream.Position = 0
objStream.Type = 2
objStream.Charset = CodeSet
BytesToBstr = objStream.ReadText
objStream.Close
SET objStream = NOTHING
End Function
'================================================
'作 用：检查组件是否已经安装
'返回值：True ----已经安装
' False ----没有安装
'================================================
Function IsObjInstalled(objName)
On Error Resume Next
IsObjInstalled = False
Err = 0
Dim testObj
SET testObj = Server.CreateObject(objName)
IF(0 = Err)THEN IsObjInstalled = True
SET testObj = NOTHING
Err = 0
End Function
Function RegExpText(strng,strStart,strEnd,n)
Dim regEx,Match,Matches,RetStr
SET regEx = New RegExp
regEx.Pattern = strStart&"([\s\S]*?)"&strEnd
regEx.IgnoreCase = True
regEx.Global = True
SET Matches = regEx.Execute(strng)
For Each Match in Matches
IF(n=1)THEN
RetStr = RetStr & regEx.Replace(Match.Value,"$1") & ","
ELSE
RetStr = RetStr & regEx.Replace(Match.Value,"$1")
END IF
Next
RegExpText = RetStr
SET regEx=NOTHING
End Function
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