实例讲解实现抓取网上房产信息的ASP程序-巨人网络通讯

实例讲解实现抓取网上房产信息的ASP程序

%@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(timei)=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
%>

　　附：抓取信息的详细页面事例

总序列号：	479280
信息类别：	出租
所在城市：	济南
房屋具体位置：	华龙路华信路交界口
房屋类型：	其他
楼层：	六层
使用面积：	24～240 平方米之间
房价：	0 　[租赁:元/月,买卖:万元/套]
其他说明：	华信商务楼3至6层小空间对外出租（0.5元/平起），本楼属纯商务办公投资使用，可用于办公写字间，周边设施齐全、交通便利（37、80、K95在本楼前经过），全产权、市证，楼内设施包括水、电、暖、电梯设施齐全，有意者可电讯！
联系人：	鲁、王
联系方式：	88017966、86812217
信息来源：	2005-8-4 8:28:55 来自：218.98.86.175
点击次数：	19