package com.dy.common.util;
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import jakarta.servlet.http.HttpServletRequest;
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import java.net.InetAddress;
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import java.net.NetworkInterface;
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import java.net.UnknownHostException;
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import java.util.Enumeration;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* 获取IP方法
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*
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* @author liurunyu
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*/
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public class IPUtils {
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/**
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* 检查IP是否合法
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*
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* @param ip
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* @return
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*/
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public static boolean ipValid(String ip) {
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String regex0 = "(2[0-4]\\d)" + "|(25[0-5])";
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String regex1 = "1\\d{2}";
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String regex2 = "[1-9]\\d";
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String regex3 = "\\d";
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String regex = "(" + regex0 + ")|(" + regex1 + ")|(" + regex2 + ")|(" + regex3 + ")";
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regex = "(" + regex + ").(" + regex + ").(" + regex + ").(" + regex + ")";
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Pattern p = Pattern.compile(regex);
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Matcher m = p.matcher(ip);
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return m.matches();
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}
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/**
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* 获取本地ip 适合windows与linux
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*
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* @return
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*/
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public static String getLocalIP() {
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String localIP = "127.0.0.1";
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try {
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Enumeration netInterfaces = NetworkInterface.getNetworkInterfaces();
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while (netInterfaces.hasMoreElements()) {
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NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
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InetAddress ip = ni.getInetAddresses().nextElement();
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if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) {
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localIP = ip.getHostAddress();
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break;
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}
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}
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} catch (Exception e) {
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try {
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localIP = InetAddress.getLocalHost().getHostAddress();
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} catch (UnknownHostException e1) {
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e1.printStackTrace();
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}
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}
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return localIP;
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}
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/**
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* 获取客户端IP
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*
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* @param request 请求对象
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* @return IP地址
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*/
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public static String getClientIp(HttpServletRequest request)
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{
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if (request == null)
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{
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return "unknown";
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}
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String ip = request.getHeader("x-forwarded-for");
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
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{
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ip = request.getHeader("Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
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{
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ip = request.getHeader("X-Forwarded-For");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
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{
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ip = request.getHeader("WL-Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
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{
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ip = request.getHeader("X-Real-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
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{
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ip = request.getRemoteAddr();
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}
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return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : getMultistageReverseProxyIp(ip);
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}
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/**
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* 检查是否为内部IP地址
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*
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* @param ip IP地址
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* @return 结果
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*/
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public static boolean internalIp(String ip)
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{
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byte[] addr = textToNumericFormatV4(ip);
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return internalIp(addr) || "127.0.0.1".equals(ip);
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}
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/**
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* 检查是否为内部IP地址
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*
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* @param addr byte地址
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* @return 结果
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*/
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private static boolean internalIp(byte[] addr)
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{
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if (addr == null || addr.length < 2)
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{
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return true;
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}
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final byte b0 = addr[0];
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final byte b1 = addr[1];
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// 10.x.x.x/8
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final byte SECTION_1 = 0x0A;
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// 172.16.x.x/12
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final byte SECTION_2 = (byte) 0xAC;
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final byte SECTION_3 = (byte) 0x10;
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final byte SECTION_4 = (byte) 0x1F;
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// 192.168.x.x/16
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final byte SECTION_5 = (byte) 0xC0;
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final byte SECTION_6 = (byte) 0xA8;
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switch (b0)
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{
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case SECTION_1:
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return true;
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case SECTION_2:
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if (b1 >= SECTION_3 && b1 <= SECTION_4)
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{
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return true;
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}
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case SECTION_5:
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switch (b1)
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{
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case SECTION_6:
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return true;
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}
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default:
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return false;
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}
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}
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/**
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* 把ip转化为整数
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*
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* @param ip
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* @return
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*/
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public static long translateIP2Int(String ip) {
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String[] intArr = ip.split("\\.");
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int[] ipInt = new int[intArr.length];
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for (int i = 0; i < intArr.length; i++) {
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ipInt[i] = Integer.parseInt(intArr[i]) ;
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}
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return ipInt[0] * 256 * 256 * 256 + +ipInt[1] * 256 * 256 + ipInt[2] * 256 + ipInt[3];
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}
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/**
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* 将IPv4地址转换成字节
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*
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* @param text IPv4地址
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* @return byte 字节
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*/
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public static byte[] textToNumericFormatV4(String text)
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{
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if (text.length() == 0)
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{
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return null;
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}
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byte[] bytes = new byte[4];
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String[] elements = text.split("\\.", -1);
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try
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{
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long l;
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int i;
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switch (elements.length)
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{
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case 1:
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l = Long.parseLong(elements[0]);
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if ((l < 0L) || (l > 4294967295L))
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{
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return null;
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}
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bytes[0] = (byte) (int) (l >> 24 & 0xFF);
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bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF);
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bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
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bytes[3] = (byte) (int) (l & 0xFF);
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break;
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case 2:
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l = Integer.parseInt(elements[0]);
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if ((l < 0L) || (l > 255L))
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{
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return null;
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}
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bytes[0] = (byte) (int) (l & 0xFF);
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l = Integer.parseInt(elements[1]);
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if ((l < 0L) || (l > 16777215L))
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{
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return null;
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}
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bytes[1] = (byte) (int) (l >> 16 & 0xFF);
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bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
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bytes[3] = (byte) (int) (l & 0xFF);
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break;
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case 3:
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for (i = 0; i < 2; ++i)
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{
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l = Integer.parseInt(elements[i]);
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if ((l < 0L) || (l > 255L))
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{
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return null;
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}
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bytes[i] = (byte) (int) (l & 0xFF);
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}
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l = Integer.parseInt(elements[2]);
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if ((l < 0L) || (l > 65535L))
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{
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return null;
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}
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bytes[2] = (byte) (int) (l >> 8 & 0xFF);
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bytes[3] = (byte) (int) (l & 0xFF);
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break;
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case 4:
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for (i = 0; i < 4; ++i)
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{
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l = Integer.parseInt(elements[i]);
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if ((l < 0L) || (l > 255L))
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{
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return null;
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}
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bytes[i] = (byte) (int) (l & 0xFF);
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}
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break;
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default:
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return null;
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}
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}
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catch (NumberFormatException e)
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{
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return null;
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}
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return bytes;
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}
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/**
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* 获取IP地址
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*
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* @return 本地IP地址
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*/
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public static String getHostIp()
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{
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try
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{
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return InetAddress.getLocalHost().getHostAddress();
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}
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catch (UnknownHostException e)
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{
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}
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return "127.0.0.1";
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}
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/**
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* 获取主机名
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*
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* @return 本地主机名
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*/
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public static String getHostName()
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{
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try
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{
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return InetAddress.getLocalHost().getHostName();
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}
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catch (UnknownHostException e)
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{
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}
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return "未知";
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}
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/**
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* 从多级反向代理中获得第一个非unknown IP地址
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*
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* @param ip 获得的IP地址
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* @return 第一个非unknown IP地址
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*/
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public static String getMultistageReverseProxyIp(String ip)
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{
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// 多级反向代理检测
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if (ip != null && ip.indexOf(",") > 0)
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{
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final String[] ips = ip.trim().split(",");
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for (String subIp : ips)
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{
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if (false == isUnknown(subIp))
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{
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ip = subIp;
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break;
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}
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}
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}
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return ip;
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}
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/**
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* 检测给定字符串是否为未知，多用于检测HTTP请求相关
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*
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* @param checkString 被检测的字符串
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* @return 是否未知
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*/
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public static boolean isUnknown(String checkString)
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{
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return isBlank(checkString) || "unknown".equalsIgnoreCase(checkString);
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}
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private static boolean isBlank(final CharSequence cs) {
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final int strLen = length(cs);
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if (strLen == 0) {
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return true;
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}
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for (int i = 0; i < strLen; i++) {
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if (!Character.isWhitespace(cs.charAt(i))) {
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return false;
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}
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}
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return true;
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}
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public static int length(final CharSequence cs) {
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return cs == null ? 0 : cs.length();
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}
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}
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