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抓取网页实例
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例如要抓取六安信息港网页（http://market.ah163.net/city/AllDisplay.php?page=1&cityid=13），可以写一个2hand-cj.asp文件，在该文件中定义一个clsThief类，类中含有上面的子程序和函数，代码如下：51Testing软件测试网P%k w}Y*YL
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<%51Testing软件测试网&~;q2oE"tN;?;B5d,L
Dim Html,myThief,url_tittle51Testing软件测试网Yc}R4MT O
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'====采集六安信息港帖子网址列表51Testing软件测试网!x6TDU;K"ER
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set myThief=new clsThief 51Testing软件测试网t ucyR;N
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GetUrl="http://market.ah163.net/city/AllDisplay.php?page=1&cityid=13"51Testing软件测试网4v qL
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myThief.src=GetUrl
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myThief.steal '抓取远程GetUrl整个网页，并将该网页二进制代码转换成字符51Testing软件测试网x1L"@/y }0j
url_tittle=myThief.value '抓取的网页存在url_tittle中
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Html=""&url_tittle&"" '最后结果存在Html中
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Response.write Html '显示结果51Testing软件测试网?e;J+t'U j6Y%q
Response.write "" 51Testing软件测试网E'U h9k:M h&_ v9j
set myThief=nothing '释放对象51Testing软件测试网$v*IN E"N.V!jv#y%KyZm8r
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Class clsThief '定义一个clsThief类
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Private value_ '窃取到的内容
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Private src_ '要偷的目标URL地址51Testing软件测试网lg,nP[ s3iC%[I,S:V
Private isGet_ '判断是否已经偷过51Testing软件测试网"`-fk:n:y(P8S
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public property let src(str) '赋值—要偷的目标URL地址/属性
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src_=str
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end property51Testing软件测试网1o^&D(\$hc
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public property get value '返回值—最终窃取并应用类方法加工过的内容/属性51Testing软件测试网1v$d&O0u\
value=value_
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end property51Testing软件测试网H5u4M-F:k Q.d
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private sub class_initialize() '初始化clsThief类51Testing软件测试网? ^d,_#v:h
value_=""51Testing软件测试网
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src_=""51Testing软件测试网w a7A8t:[0^:B&y~~
isGet_= false51Testing软件测试网z`-DJf6_:HQ} R
end sub
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public sub steal() '窃取目标URL地址的HTML代码/方法51Testing软件测试网C9N
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if src_<>"" then51Testing软件测试网 g%b7{'tV6A9Q
dim Http51Testing软件测试网
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set Http=server.createobject("Micorosoft.XMLHTTP")51Testing软件测试网 N&RF W7N-gFCc8G
Http.open "GET",src_ ,false
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Http.send()51Testing软件测试网/Ie N QU$f^,iA
if Http.readystate<>4 then 51Testing软件测试网:zXW&Nsmw
exit sub51Testing软件测试网*b3Y+r+e9l2r},r9s
end if
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value_=BytesToBSTR(Http.responseBody,"GB2312") '将网页二进制转换成字符
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if len(value_)<100 then51Testing软件测试网^(x/y\W|#BnTi*Hr,s
response.write "获取远程文件 "&url&" 失败。"51Testing软件测试网*b-?)~ ?:S8A"|
response.end51Testing软件测试网
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end if51Testing软件测试网C SdS]y n-m
isGet_= True51Testing软件测试网rv8v&H+U:|
set http=nothing51Testing软件测试网c ?-i Z1l
if err.number<>0 then err.Clear
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else 51Testing软件测试网*@)e D_&oC
response.Write("alert(""请先设置src属性！"")")51Testing软件测试网J$M+|m Dr s \
end if
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end sub
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private Function BytesToBstr(body,Cset) '二进制转换成字符
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dim objstream
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set ōbjstream = Server.Createobject("adodb.stream")
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objstream.Type = 151Testing软件测试网DP6W;EqP*S
objstream.Mode =351Testing软件测试网'W4f.mh6L,~(\
objstream.Open51Testing软件测试网g&G&c P$f4P J
objstream.Write body51Testing软件测试网w8h_.Ls
objstream.Position = 0
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objstream.Type = 251Testing软件测试网1S$|8^;N/n'd jU
objstream.Charset = Cset51Testing软件测试网+{8ZZ/N)~]
BytesToBstr = objstream.ReadText 51Testing软件测试网3?z O2~X Od E6k
objstream.Close
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set ōbjstream = nothing
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End Function
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end class
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解释一下以上程序中几个关键的语句：51Testing软件测试网
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GetUrl=http://market.ah163.net/city/AllDisplay.php?page=1&cityid=13 '要采集的网址
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myThief.src=GetUrl '网址赋予myThief.src
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myThief.steal '调用steal方法抓取远程网页，并将该网页二进制代码转换成字符
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url_tittle=myThief.value '抓取的网页存放在url_tittle中
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Html=""&url_tittle&"" '最后结果存放在Html中
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Response.write Html '使用response显示抓取的网页
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