asp版的防范SQL注入式攻击代码～：
[CODE START]
<%
On Error Resume Next
Dim strTemp

If LCase(Request.ServerVariables("HTTPS")) = "off" Then
 strTemp = "http://"
Else
 strTemp = "https://"
End If

strTemp = strTemp & Request.ServerVariables("SERVER_NAME")
If Request.ServerVariables("SERVER_PORT") <> 80 Then strTemp = strTemp & ":" & Request.ServerVariables("SERVER_PORT")

strTemp = strTemp & Request.ServerVariables("URL")

If Trim(Request.QueryString) <> "" Then strTemp = strTemp & "?" & Trim(Request.QueryString)

strTemp = LCase(strTemp)

If Instr(strTemp,"select%20") or Instr(strTemp,"insert%20") or Instr(strTemp,"delete%20from") or Instr(strTemp,"count(") or Instr(strTemp,"drop%20table") or Instr(strTemp,"update%20") or Instr(strTemp,"truncate%20") or Instr(strTemp,"asc(") or Instr(strTemp,"mid(") or Instr(strTemp,"char(") or Instr(strTemp,"xp_cmdshell") or Instr(strTemp,"exec%20master") or Instr(strTemp,"net%20localgroup%20administrators")  or Instr(strTemp,":") or Instr(strTemp,"net%20user") or Instr(strTemp,"''") or Instr(strTemp,"%20or%20") then
 Response.Write "<script language=''javascript''>"
 Response.Write "alert(''非法地址！！'');"
 Response.Write "location.href=''error.asp'';"
 Response.Write "<script>"
End If
%>
[CODE END]

C# 检查字符串,防SQL注入攻击
这个例子里暂定为=号和''号
bool CheckParams(params object[] args)
{
    string[] Lawlesses={"=","''"};
    if(Lawlesses==null||Lawlesses.Length<=0)return true;
    //构造正则表达式,例:Lawlesses是=号和''号,则正则表达式为 .*[=}''].*  (正则表达式相关内容请见MSDN)
    //另外,由于我是想做通用而且容易修改的函数,所以多了一步由字符数组到正则表达式,实际使用中,直接写正则表达式亦可;
    string str_Regex=".*[";
    for(int i=0;i< Lawlesses.Length-1;i++)
        str_Regex+=Lawlesses[i]+"|";
    str_Regex+=Lawlesses[Lawlesses.Length-1]+"].*";
    //
    foreach(object arg in args)
    {
        if(arg is string)//如果是字符串,直接检查
        {
            if(Regex.Matches(arg.ToString(),str_Regex).Count>0)
            return false;
        }
        else if(arg is ICollection)//如果是一个集合,则检查集合内元素是否字符串,是字符串,就进行检查
        {
            foreach(object obj in (ICollection)arg)
            {
                if(obj is string)
                {
                    if(Regex.Matches(obj.ToString(),str_Regex).Count>0)
                    return false;
                }
            }
        }
    }
    return true;

上一页  [1] [2]