這里以ASPUPLOAD組件上傳為例
以下3個關(guān)鍵函數(shù):
function killext(byval s1) '干掉非法文件后綴
dim allowext
allowext=".JPG,.JPEG,.GIF,.BMP,.PNG,.SWF,.RM,.MP3,.WAV,.MID,.MIDI,.RA,.
AVI,.MPG,.MPEG,.ASF,.ASX,.WMA,.MOV,.RAR,.ZIP,.EXE,.DOC,.XLS,.CHM,.HLP,.PDF"
s1=ucase(s1)
if len(s1)=0 then
killext=""
else
if not chk(allowext,s1,",") then
killext=".shit"
else
killext=s1
end if
end if
end function
function chk(byval s1,byval s2,byval fuhao) '檢查字符串包含
dim i,a
chk=false
a=split(s1,fuhao)
for i = 0 to ubound(a)
if trim(a(i))=trim(s2) then
chk=true
exit for
end if
next
end function
function gname(byval n1) '以日期自動產(chǎn)生目錄和文件名,參數(shù)1生成目錄,參數(shù)2生成文件名(無后綴)
dim t,r
t=now()
randomize(timer)
r=int((rnd+1-1)*9999)
select case n1
case 1
gname=year(t)&right("00"&month(t),2)&right("00"&day(t),2)
case 2
gname=right("00"&hour(t),2)&right("00"&minute(t),2)&right("00"&second(t),2)&right("0000"&r,4)
end select
end function
調(diào)用方法:
dim oup,ofile,ext,myfile
Set oup = Server.CreateObject("Persits.Upload")
oup.SetMaxSize 10000000, True
call oup.Save() '這里是上傳到服務器內(nèi)存,并沒有實際文件產(chǎn)生
set ofile = oup.files(1)
ext=killext(ofile.ext)
myfile="/" & ganme(1) & "/" & gname(2) & ext
call ofile.saveas(server.mappath(myfile))
附加說明:
黑客如果用 nc 上傳非法文件,最終得到的文件只是如 200511051234559103.shit之類的“狗屎”文件!
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