防采集的JS代码
防采集的JS代码
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<script language="JavaScript" type="text/javascript">
- Z8 m) v3 F. d/ ^% ~% B// Example:6 n3 e7 | o) t7 p6 o. ?3 {% N
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// writeCookie("myCookie", "my name", 24);
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. `+ g( e$ W8 J0 s }$ z0 A// Stores the string "my name" in the cookie "myCookie" which expires after 24 hours.
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function writeCookie(name, value, hours)) I7 I' e" m# L
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var expire = "";8 p/ I; u& V) j3 S- ]7 E
: G8 i7 D: `( h, v if(hours != null)8 ?% k; @$ ~9 [1 T5 X
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' G# j& Y6 U3 t1 O- ` expire = new Date((new Date()).getTime() + hours * 3600000);5 X. j& o( V& k. F5 y7 W. [ O6 X3 ?
- `$ f& p. F* K) c, V: @ expire = "; expires=" + expire.toGMTString();
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document.cookie = name + "=" + escape(value) + expire;
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# D, Q! T* z# Y9 M. ~# x' @// Example:
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$ ?/ F0 o' x' X- `. U; n// alert( readCookie("myCookie") );4 H) X5 g. w4 ~4 p# E# R& _
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function readCookie(name)
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{
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6 X7 Z4 i; u+ i( A9 ?# y% O var cookieValue = "";2 [1 T I! s' ?
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var search = name + "=";
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7 ~0 a6 c# ^' @# Z, P8 F+ I if(document.cookie.length > 0)
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$ H8 @2 r5 x* L offset = document.cookie.indexOf(search);
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if (offset != -1)
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offset += search.length;' W o: A/ c0 O2 y5 V# j5 w
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end = document.cookie.indexOf(";", offset);' M6 g4 R6 z1 _! j, Y$ P5 @9 Q3 q9 ]1 l
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if (end == -1) end = document.cookie.length;
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cookieValue = unescape(document.cookie.substring(offset, end))2 l. U/ m: f5 A4 [
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return cookieValue;
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</script>
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引用以下asp代码改成的，js代码方便，但有些工具可以绕过JS，用js防止“低手”，节约一部分服务器资源，而用asp防止绕过js判断的“高手”。
1 I( t* q5 T. J结合CMS的封IP，把本地的127.0.0.1也封掉，效果会好些：5 ?: K- S9 m! j. _* H
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Dim AppealNum,AppealCount
& q+ W' L! |2 ]6 wAppealNum=10 '同一IP60秒内请求限制10次
; C; a/ s4 N6 }9 j$ AAppealCount=Request.Cookies("AppealCount")
N* a1 I; g+ N( |& E! xIf AppealCount="" Then: [8 M1 [2 W* g4 w
response.Cookies("AppealCount")=1) V5 l5 y- z" l% J0 G( i3 a
AppealCount=1
, _0 R7 r3 u+ [# v% eresponse.cookies("AppealCount").expires=dateadd("s",60,now())
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response.Cookies("AppealCount")=AppealCount+1" j t2 Y/ S6 Y
response.cookies("AppealCount").expires=dateadd("s",60,now())
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if int(AppealCount)>int(AppealNum) then3 r! Z. j# q0 {) n
response.write "抓取很累，歇一会儿吧！"
$ }1 w' |% e; j/ F/ X$ U/ y5 gresponse.end
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