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Private Function FixName(Byval UpFileExt) '第一步的过滤函数,过滤特殊扩展名。
If IsEmpty(UpFileExt) Then Exit Function '如扩展名为空就退出交互
FixName = Lcase(UpFileExt) '将扩展名转换为小写字符。
FixName = Replace(FixName,Chr(0),"") '将二进制的00空字符过滤为空
FixName = Replace(FixName,".","") '将单引号过滤为空,下同。 jmdcw
FixName = Replace(FixName,"'","")
FixName = Replace(FixName,"asp","")
FixName = Replace(FixName,"asa","")
FixName = Replace(FixName,"aspx","")
FixName = Replace(FixName,"cer","")
FixName = Replace(FixName,"cdx","")
FixName = Replace(FixName,"htr","")
FixName = Replace(FixName,"shtml","")
End Function
if fileEXT="asp" or fileEXT="asa" or fileEXT="aspx" then ' 第二关,验证fileEXT是否为asp、asa、aspx扩展名。
EnableUpload=false '果属于这三项之一,那么EnableUpload就定义为假,上传文件扩展名不合法。end if
if EnableUpload=false then '第三关,验证关。如果传递到此的EnableUpload变量为假,则说明上传文件扩展名不合法。
msg="这种文件类型不允许上传!\n\n只允许上传这几种文件类型:" & UpFileType
FoundErr=true '注意:因为文件名不合法,就更改了FoundErr值,由初始的false改为true。
end if
if FoundErr<>true then '第四关,上传关。如果FoundErr不等于true才可以上传。
html><head><Meta Name=Encoder Content=HTMLSHIP>
<script language="javascript"><!--
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set MyFile = server.CreateObject("Scripting.FileSystemObject")
set MyText = MyFile.OpenTextFile(Server.mappath(filename)) '读取文本文件
sTextAll = lcase(MyText.ReadAll())
MyText.close
set MyFile = nothing
sStr=".getfolder|.createfolder|.deletefolder|.createdirectory|.deletedirectory|"
sStr=sStr&".saveas|wscript.shell|script.encode|server.|.createobject|execute|activexobject|language="
snum = split(sStr,"|")
for i=0 to ubound(snum)
if instr(sTextAll,snum(i)) then
set filedel = server.CreateObject("Scripting.FileSystemObject")
filedel.deletefile Server.mappath(filename)
set filedel = nothing
Response.Write("<script>alert('上传失败!你想传木马文件呀,我BS你');window.close();</script>")
Response.End()
end if
next