hoanghuynh2409
Admin
Tổng số bài gửi : 12
Points : 43
Reputation : 1
Join date : 04/04/2011
 |  Tiêu đề: Filter cấm 1 địa chỉ ip bất kì  Sat May 07, 2011 4:22 pm | |
| cái phần này chỉ có code ở trang filter còn jsp chạy bình thường ko quan trọng if cái ip thỏa điều kiện thì cấm ip đó truy cập website - Code:
-
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
if (debug) log("FilterIP:doFilter()");
//=============================================================================
String IP = "127.0.0.1";
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><head><title>IP Filter Example</title></head>");
String userip = request.getRemoteAddr();
HttpServletResponse httpResponse = null;
if (response instanceof HttpServletResponse){
httpResponse = (HttpServletResponse) response;
}
if (IP.equals(userip)) {
httpResponse.sendError(HttpServletResponse.SC_FORBIDDEN,"You are not allowed to access the servlet!");
} else {
chain.doFilter(request, response);
out.println("<body><h3><font color='green'>Passed successfully from IP Filter<font></h3></body></html>");
}
//=============================================================================
Cái này của cô làm mà mình chưa hiểu mấy post lên cho các bạn tham khảo - Code:
-
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException {
if (debug) log("FilterPrefixIP:doFilter()");
//==============================================================================
String PrefixIP = "127.0";
String ip = request.getRemoteAddr();
HttpServletResponse httpResp = null;
if (response instanceof HttpServletResponse)
httpResp = (HttpServletResponse) response;
StringTokenizer toke = new StringTokenizer(ip, ".");
int dots = 0;
String byte1 = "";
String byte2 = "";
String client = "";
while (toke.hasMoreTokens()) {
++dots;
if (dots == 1) {
byte1 = toke.nextToken();
} else {
byte2 = toke.nextToken();
break;
}
}
client = byte1 + "." + byte2;
if (PrefixIP.equals(client)) {
httpResp.sendError(HttpServletResponse.SC_FORBIDDEN,"That means goodbye forever!");
} else {
chain.doFilter(request, response);
}
//==============================================================================
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