最近在做项目中,有一个这样的需求,用户要求有些内容只能内网也就是局域网才能访问。
因此,为了实现此功能,我是这样想的:既然有些内容只能内网可以访问,换句话说也就是有些内容外网不可以访问,内网所有内容都可以访问
因此,当用户访问时,获取用户的ip,然后判断ip是内网还是外网,如果是外网,便不向该用户显示用户不想给外网用户看到的内容即可。
判断依据:
内网ip段:
A类 10.0.0.0--10.255.255.255
B类 172.16.0.0--172.31.255.255
C类 192.168.0.0--192.168.255.255
最后,附上实现代码:
/**
* 根据ip判断是否内网,如果是,则返回true
*
* @param request
* @return
*/
public static boolean isInnerNet(HttpServletRequest request) {
String ip = getIPAddr(request);
// System.out.println("ip是:"+ip);
if (ip.startsWith("10")) {
return true;
} else if (ip.startsWith("172")) {
if (ip.startsWith("172.1") && ip.charAt(5) >= '6' && ip.charAt(6) == '.') {
return true;
} else if (ip.startsWith("172.2") && ip.charAt(6) == '.') {
return true;
} else if (ip.startsWith("172.3") && ip.charAt(5) <= '1') {
return true;
} else {
return false;
}
} else if (ip.startsWith("192.168")) {
return true;
} else {
return false;
}
}
/**
* 获取http请求的真实IP地址
*
* @param request
* @return
*/
private static String getIPAddr(HttpServletRequest request) {
if (request == null)
return null;
String ip = request.getHeader("X-Forwarded-For");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
ip = request.getHeader("Proxy-Client-IP");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
ip = request.getHeader("WL-Proxy-Client-IP");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
ip = request.getHeader("HTTP_CLIENT_IP");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
ip = request.getRemoteAddr();
if ("127.0.0.1".equals(ip) || "0:0:0:0:0:0:0:1".equals(ip))
try {
ip = InetAddress.getLocalHost().getHostAddress();
} catch (UnknownHostException unknownhostexception) {
}
return ip;
}
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