asp实现防止从外部提交数据的三种方法

  防止从外部提交数据的方法

  第一种做法,屏蔽特殊字符和关键字

  fqys=request.servervariables("query_string")

  dim nothis(18)

  nothis(0)="net user"

  nothis(1)="xp_cmdshell"

  nothis(2)="/add"

  nothis(3)="exec%20master.dbo.xp_cmdshell"

  nothis(4)="net localgroup administrators"

  nothis(5)="select"

  nothis(6)="count"

  nothis(7)="asc"

  nothis(8)="char"

  nothis(9)="mid"

  nothis(10)="'"

  nothis(11)=":"

  nothis(12)=""""

  nothis(13)="insert"

  nothis(14)="delete"

  nothis(15)="drop"

  nothis(16)="truncate"

  nothis(17)="from"

  nothis(18)="%"

  errc=false

  for i= 0 to ubound(nothis)

  if instr(FQYs,nothis(i))<>0 then

  errc=true

  end if

  next

  if errc then

  response.write "<script language=""javascript"">"

  response.write "parent.alert('很抱歉!你正在试图攻击本服务器或者想取得本服务器最高管理权!将直接转向首页..');"

  response.write "self.location.href='default.asp';"

  response.write "</script>"

  response.end

  end if

  第二种可以防止客户从本地提交到网站上

  <%

  server_v1=Cstr(Request.ServerVariables("HTTP_REFERER"))

  server_v2=Cstr(Request.ServerVariables("SERVER_NAME"))

  if mid(server_v1,8,len(server_v2))<>server_v2 then

  response.write "<br><br><center><table border=1 cellpadding=20 bordercolor=black bgcolor=#EEEEEE width=450>"

  response.write "<tr><td style=font:9pt Verdana>"

  response.write "你提交的路径有误,禁止从站点外部提交数据请不要乱该参数!"

  response.write "</td></tr></table></center>"

  response.end

  end if

  %>

  第三。这样可以防止在输入框上打上or 1=1 的字样

  If Instr(request("username"),"=")>0 or

  Instr(request("username"),"%")>0 or

  Instr(request("username"),chr(32))>0 or

  Instr(request("username"),"?")>0 or

  Instr(request("username"),"&")>0 or

  Instr(request("username"),";")>0 or

  Instr(request("username"),",")>0 or

  Instr(request("username"),"'")>0 or

  Instr(request("username"),"?")>0 or

  Instr(request("username"),chr(34))>0 or

  Instr(request("username"),chr(9))>0 or

  Instr(request("username")," ")>0 or

  Instr(request("username"),"$")>0 or

  Instr(request("username"),">")>0 or

  Instr(request("username"),"<")>0 or

  Instr(request("username"),"""")>0 then