实例讲解ASP实现抓取网上房产信息

编程学习 2021-07-05 10:57www.dzhlxh.cn编程入门
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
<!-- #include file="conn.ASP" --> 
<!-- #include file="inc/function.asp" -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta http-equiv="refresh" content="300;URL=steal_house.asp">
</head>

<body>
<%
on error resume next

Server.ScriptTimeout = 999999
'========================================================
'字符编码函数
'====================================================
Function BytesToBstr(body,code) 
dim objstream 
set objstream = Server.createObject("adodb.stream") 
objstream.Type = 1 
objstream.Mode =3 
objstream.Open 
objstream.Write body 
objstream.Position = 0 
objstream.Type = 2 
objstream.Charset =code
BytesToBstr = objstream.ReadText 
objstream.Close 
set objstream = nothing 
End Function 

'取行字符串在另一字符串中的出现位置
Function Newstring(wstr,strng) 
Newstring=Instr(lcase(wstr),lcase(strng)) 
if Newstring<=0 then Newstring=Len(wstr) 
End Function 
'替换字符串函数
function ReplaceStr(ori,str1,str2)
ReplaceStr=replace(ori,str1,str2)
end function
'====================================================
function ReadXML(url,code,start,ends)
set oSend=createobject("Microsoft.XMLHTTP")
SourceCode = oSend.open ("GET",url,false) 
oSend.send()
ReadXml=BytesToBstr(oSend.responseBody,code )
start=Instr(ReadXml,start)
ReadXml=mid(ReadXml,start)
ends=Instr(ReadXml,ends)
ReadXml=left(ReadXml,ends-1)
end function

function SubStr(body,start,ends)
start=Instr(body,start)
SubStr=mid(body,start+len(start)+1)
ends=Instr(SubStr,ends)
SubStr=left(SubStr,ends-1)
end function

dim getcont,NewsContent
dim url,title
url="http://www.***.com"'新闻网址knowsky.com
getcont=ReadXml(url,"gb2312","<table class=k2 border=""0""","</table>")
getcont=RegexHtml(getcont)
dim KeyId,NewsClass,City,Position,HouseType,Level,Area,Price,Demostra

dim ContactMan,Contact
for i=2 to ubound(getcont)
response.Write(getcont(i)&"__<br>")

tempLink=mid(getcont(i),instr(getcont(i),"href=""")+6,instr(getcont(i),""" onClick")-10)
tempLink=replace(tempLink,"../","")

response.Write(i&":"&tempLink&"<br>")
NewsContent=ReadXml(tempLink,"gb2312","<td valign=""bottom"" width=""400"">","<hr width=""760"" noshade size=""1"" color=""#808080""> ")
NewsContent=RemoveHtml(NewsContent)
NewsContent=replace(NewsContent,VbCrLf,"")
NewsContent=replace(NewsContent,vbNewLine,"")
NewsContent=replace(NewsContent," ","")
NewsContent=replace(NewsContent," ","")
NewsContent=replace(NewsContent,"&nbsp;","") 
NewsContent=replace(NewsContent,"\n","") 
NewsContent=replace(NewsContent,chr(10),"")
NewsContent=replace(NewsContent,chr(13),"")
'===============get Content=======================
response.Write(NewsContent)
KeyId=SubStr(NewsContent,"列号:","信息类别:")
NewsClass=SubStr(NewsContent,"类别:","所在城市:")
City=SubStr(NewsContent,"城市:","房屋具体位置:")
Position=SubStr(NewsContent,"位置:","房屋类型:")
HouseType=SubStr(NewsContent,"类型:","楼层:")
Level=SubStr(NewsContent,"楼层:","使用面积:")
Area=SubStr(NewsContent,"面积:","房价:")
Price=SubStr(NewsContent,"房价:","其他说明:")
Demostra=SubStr(NewsContent,"说明:","联系人:")
ContactMan=SubStr(NewsContent,"联系人:","联系方式:")
Contact=SubStr(NewsContent,"联系方式:","信息来源:") 
response.Write("总序列号:"&KeyId&"<br>")
response.Write("信息类别:"&NewsClass&"<br>")
response.Write("所在城市:"&City&"<br>")
response.Write("房屋具体位置:"&Position&"<br>")
response.Write("房屋类型:"&HouseType&"<br>")
response.Write("楼层:"&Level&"<br>")
response.Write("使用面积:"&Area&"<br>")
response.Write("房价:"&Price&"<br>")
response.Write("其他说明:"&Demostra&"<br>")
response.Write("联系人:"&ContactMan&"<br>")
response.Write("联系方式:"&Contact&"<br>")
'title=RemoveHTML(aa(i))
'response.Write("title:"&title)
for n=0 to application.Contents.count
if(application.Contents(n)=KeyId) then
ifexit=true 
end if 
next 
if not ifexit then
application(time&i)=KeyId
'添加到数据库
'====================================================
set rs=server.createObject("adodb.recordset") 
rs.open "select top 1 * from news order by id desc",conn,3,3
rs.addnew
rs("NewsClass")=NewsClass
rs("City")=City
rs("Position")=Position
rs("HouseType")=HouseType
rs("Level")=Level
rs("Area")=Area
rs("Price")=Price
rs("Demostra")=Demostra
rs("ContactMan")=ContactMan
rs("Contact")=Contact
rs.update
rs.close
set rs=nothing
end if
'==================================================

next
function RemoveTag(body)

Set regEx = New RegExp
regEx.Pattern = "<[a].*?<\/[a]>"
regEx.IgnoreCase = True
regEx.Global = True
Set Matches = regEx.Execute(body) 
dim i,arr(15),ifexit
i=0
j=0
For Each Match in Matches
TempStr = Match.Value 
TempStr=replace(TempStr,"<td>","")
TempStr=replace(TempStr,"</td>","")
TempStr=replace(TempStr,"<tr>","")
TempStr=replace(TempStr,"</tr>","") 
arr(i)=TempStr 
i=i+1
if(i>=15) then
exit for
end if
Next
Set regEx=nothing
Set Matches =nothing
RemoveTag=arr

end function
function RegexHtml(body)
dim r_arr(47),r_temp
Set regEx2 = New RegExp
regEx2.Pattern ="<a.*?<\/a>"
regEx2.IgnoreCase = True
regEx2.Global = True
Set Matches2 = regEx2.Execute(body) 
iii=0 
For Each Match in Matches2

r_arr(iii)=Match.Value

iii=iii+1 
Next
RegexHtml=r_arr
set regEx2=nothing
set Matches2=nothing
end function
'======================================================

conn.close
set conn=nothing
%>
</body>
</html>




  function.asp

<%
'**************************************************
'函数名:gotTopic
'作 用:截字符串,汉字一个算两个字符,英文算一个字符
'参 数:str ----原字符串
' strlen ----截取长度
'返回值:截取后的字符串
'**************************************************
function gotTopic(str,strlen)
if str="" then
gotTopic=""
exit function
end if
dim l,t,c, i
str=replace(replace(replace(replace(str,"&nbsp;"," "),"&quot;",chr(34)),"&gt;",">"),"&lt;","<")
str=replace(str,"?","")
l=len(str)
t=0
for i=1 to l
c=Abs(Asc(Mid(str,i,1)))
if c>255 then
t=t+2
else
t=t+1
end if
if t>=strlen then
gotTopic=left(str,i) & "…"
exit for
else
gotTopic=str
end if
next
gotTopic=replace(replace(replace(replace(gotTopic," ","&nbsp;"),chr(34),"&quot;"),">","&gt;"),"<","&lt;")
end function
'=========================================================
'函数:RemoveHTML(strHTML)
'功能:去除HTML标记
'参数:strHTML --要去除HTML标记的字符串
'=========================================================
Function RemoveHTML(strHTML) 
Dim objRegExp, Match, Matches 
Set objRegExp = New Regexp 

objRegExp.IgnoreCase = True 
objRegExp.Global = True 
'取闭合的<> 
objRegExp.Pattern = "<.+?>" 
'进行匹配 
Set Matches = objRegExp.Execute(strHTML) 

' 遍历匹配集合,并替换掉匹配的项目 
For Each Match in Matches 
strHtml=Replace(strHTML,Match.Value,"") 
Next 
RemoveHTML=strHTML 
Set objRegExp = Nothing 
set Matches=nothing
End Function 

%>



  conn.asp

<%
'on error resume next
set conn=server.createObject("adodb.connection") 
con= "driver={Microsoft Access Driver (*.mdb)};dbq=" & Server.MapPath("stest.mdb") 
conn.open con

sub connclose 
conn.close
set conn=nothing 
end sub
%>

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