使用說(shuō)明
1.在要保護(hù)的頁(yè)面頂部加如對(duì)AntiRefresh.asp文件的引用如：
!--#include virtual="AntiRefresh.asp" -->
2.接著添加調(diào)用代碼
復(fù)制代碼 代碼如下:
%
Const VarNameDateArr="www_domai_net_App_DataArr" '隊(duì)列名稱
Const VarNameIPArr="www_domai_net_App_IPArr" '隊(duì)列名稱
Dim objAntiRefresh
Set objAntiRefresh= new AntiRefresh
objAntiRefresh.BufferSize=100 '隊(duì)列大小
objAntiRefresh.CacheItemAvailTime=2 '間隔時(shí)間
If Not objAntiRefresh.IsValidAccess() Then
Set objAntiRefresh=Nothing
Response.Write("您的訪問(wèn)過(guò)去頻繁請(qǐng)2秒后再試.")
Response.End()
End If
Set objAntiRefresh=Nothing
%>
其中要注意的是
Const VarNameDateArr="www_domai_net_App_DataArr" '隊(duì)列名稱
Const VarNameIPArr="www_domai_net_App_IPArr" '隊(duì)列名稱
比方你要在List.asp與search.asp中加入通一個(gè)防刷新器，那么你把上面的調(diào)用代碼分別復(fù)制到這兩個(gè)頁(yè)面，或者保證兩個(gè)頁(yè)面的掉用代碼一致。這樣的效果是，你訪問(wèn)了List.asp頁(yè)那么你在2秒內(nèi)將不能訪問(wèn)List.asp或Search.asp頁(yè)
如果你要2個(gè)頁(yè)面獨(dú)立，即你訪問(wèn)List.asp后，你會(huì)在2秒內(nèi)不能再次訪問(wèn)List.asp，但是你可以訪問(wèn)Search.asp，反之毅然，那么你就要保證2個(gè)頁(yè)面的 Const VarNameDateArr="xxx"，Const VarNameIPArr="xxx"不同，比方第一個(gè)也面你用xxxList,第個(gè)個(gè)頁(yè)面用xxxSearch,
如:
Const VarNameDateArr="www_domai_net_App_DataArr_Search" '(_List)
Const VarNameIPArr="www_domai_net_App_IPArr_Search" '(_List)
嘮叨這些是給那么不太懂的朋友，以便他們能使用這些代碼，如果你懂Asp那么以上的對(duì)你來(lái)說(shuō)就很好理解了。
下面是AntiRefresh.asp文件源碼
復(fù)制代碼 代碼如下:
%
'***************************************
'* 頁(yè)面防刷新模塊 *
'* WDFrog,2007-8-16
'***************************************
Class AntiRefresh
Private IPArr,DateArr
Private m_BufferSize
Private m_CacheItemAvailTime
Private Sub Class_Initialize()
Application.Lock()
m_BufferSize=100
m_CacheItemAvailTime=2
End Sub
Private Sub Class_Terminate()
Application.UnLock()
End Sub
Public Property Get CacheItemAvailTime
CacheItemAvailTime=m_CacheItemAvailTime
End Property
Public Property Let CacheItemAvailTime(Value)
m_CacheItemAvailTime=Value
End Property
Public Property Get BufferSize
BufferSize=m_BufferSize
End Property
Public Property Let BufferSize(Value)
m_BufferSize=Value
End Property
Private Sub EnsureArr()
If IsArray(Application(VarNameDateArr)) Then
DateArr=Application(VarNameDateArr)
Else
ReDim DateArr(BufferSize)
End If
If IsArray(Application(VarNameIPArr)) Then
IPArr=Application(VarNameIPArr)
Else
ReDim IPArr(BufferSize)
End If
End Sub
Public Function IsValidAccess()
Dim ip,i
ip=GetIP()
IsValidAccess=True
EnsureArr()
For i=1 To BufferSize
If IPArr(i)=ip Then
If DateDiff("s",CDate(DateArr(i)),Now()) CacheItemAvailTime Then
IsValidAccess=False
Exit Function
End If
End If
Next
Call QueueHandle()
DateArr(1)=Now()
IPArr(1)=ip
Application(VarNameIPArr)=IPArr
Application(VarNameDateArr)=DateArr
End Function
Public Function ClearCache()
Set Application(VarNameDateArr)=Nothing
Set Application(VarNameIPArr)=Nothing
End Function
Private Sub QueueHandle()
Dim i,j
For i=BufferSize-1 To 1 Step -1
DateArr(i+1)=DateArr(i)
Next
For j=BufferSize-1 To 1 Step -1
IPArr(j+1)=IPArr(j)
Next
End Sub
Private Function GetIP()
Dim strIPAddr
If Request.ServerVariables("HTTP_X_FORWARDED_FOR") = "" OR InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), "unknown") > 0 Then
strIPAddr = Request.ServerVariables("REMOTE_ADDR")
ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",") > 0 Then
strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ",")-1)
ElseIf InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";") > 0 Then
strIPAddr = Mid(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), 1, InStr(Request.ServerVariables("HTTP_X_FORWARDED_FOR"), ";")-1)
Else
strIPAddr = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
End If
GetIP = (Trim(Mid(strIPAddr, 1, 30)))
End Function
End Class
%>
asp防止刷新
復(fù)制代碼 代碼如下:
Sub chkreflash()
dim ScriptName
ScriptName=lcase(request.ServerVariables("PATH_INFO"))
dim posttime,DoReflashPage,ReflashPage,SplitReflashPage
posttime=1 '防止刷新時(shí)間
DoReflashPage=false
ReflashPage="|Article_one.asp"
SplitReflashPage=split(ReflashPage,"|")
for i=0 to ubound(SplitReflashPage)
if instr(scriptname,SplitReflashPage(i))>0 then
DoReflashPage=true
exit for
end if
next
if (not isnull(session("ReflashTime"))) and posttime>0 and DoReflashPage then
if DateDiff("s",session("ReflashTime"),Now())posttime then
call msg("警告！系統(tǒng)已記錄您的IP，和刷新次數(shù)。\n\n請(qǐng)不要在"posttime"秒內(nèi)連續(xù)刷新本頁(yè)面！","-1")
else
session("ReflashTime")=Now()
end if
elseif isnull(session("ReflashTime")) and posttime>0 and DoReflashPage then
Session("ReflashTime")=Now()
end if
End Sub
調(diào)用方法在頁(yè)面首部加入chkreflash即可
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