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如何验证IP地址?_编程10000问_

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  sub chkIP(boardid)
    dim rsIP
    dim ipArr
    dim ignored
    dim i
    dim ip
    dim sql

    ip=Request.ServerVariables("REMOTE_ADDR")    
    ignored=false
    if not isempty(boardid) then    
     sql="select ignoreip from board where boardid="&cstr(boardid)
     set rsIP=conn.execute(sql)
     if not (rsIP.eof and rsIP.bof) then
       if instr(cstr(rsIP("ignoreip")&""),chr(13)&chr(10)) then
        iparr=split(rsIP("ignoreip"),chr(13)&chr(10))
        for i=0 to ubound(iparr)
          if trim(iparr(i))<>"" and left(ip,len(trim(iparr(i))))=trim(iparr(i))   then
            ignored=true
            exit for
          end if
        next
       else
        iparr=rsIP("ignoreip")
        if ip=trim(iparr) then
          ignored=true
        end if
       end if
     end if
     rsIP.close
    end if
    if ignored then
     response.write "<script language=javascript>window.location.href='ignoreip.htm'</script>"
    end if
  end sub

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