cloud.tianai.rpc.common.util.IPUtils Maven / Gradle / Ivy

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package cloud.tianai.rpc.common.util;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import java.util.regex.Pattern;


@Slf4j
public class IPUtils {
    private static final String LOCALHOST_IP = "127.0.0.1";
    private static final String EMPTY_IP = "0.0.0.0";
    private static final Pattern IP_PATTERN = Pattern.compile("[0-9]{1,3}(\\.[0-9]{1,3}){3,}");

    public static String getIpV4() {
        String ip = "";
        Enumeration networkInterface;
        try {
            networkInterface = NetworkInterface.getNetworkInterfaces();
        } catch (SocketException e) {
            return ip;
        }
        Set ips = new HashSet();
        while (networkInterface.hasMoreElements()) {
            NetworkInterface ni = networkInterface.nextElement();

            Enumeration inetAddress = null;
            try {
                if (null != ni) {
                    inetAddress = ni.getInetAddresses();
                }
            } catch (Exception e) {
            }
            while (null != inetAddress && inetAddress.hasMoreElements()) {
                InetAddress ia = inetAddress.nextElement();
                if (ia instanceof Inet6Address) {
                    continue; // ignore ipv6
                }
                String thisIp = ia.getHostAddress();
                // 排除 回送地址
                if (!ia.isLoopbackAddress() && !thisIp.contains(":") && !"127.0.0.1".equals(thisIp)) {
                    ips.add(thisIp);
                    if (StringUtils.isEmpty(ip)) {
                        ip = thisIp;
                    }
                }
            }
        }

        if (StringUtils.isEmpty(ip)) {
            ip = "";
        }
        return ip;
    }

    public static String getHostIp() {
        InetAddress address = getHostAddress();
        return address == null ? null : address.getHostAddress();
    }

    public static InetAddress getHostAddress() {
        InetAddress localAddress = null;
        try {
            Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
            if (interfaces != null) {
                while (interfaces.hasMoreElements()) {
                    try {
                        NetworkInterface network = interfaces.nextElement();
                        Enumeration addresses = network.getInetAddresses();
                        if (addresses != null) {
                            while (addresses.hasMoreElements()) {
                                try {
                                    InetAddress address = addresses.nextElement();
                                    if (isValidHostAddress(address)) {
                                        return address;
                                    }
                                } catch (Throwable e) {
                                    log.warn("Failed to retriving network card ip address. cause:" + e.getMessage());
                                }
                            }
                        }
                    } catch (Throwable e) {
                        log.warn("Failed to retriving network card ip address. cause:" + e.getMessage());
                    }
                }
            }
        } catch (Throwable e) {
            log.warn("Failed to retriving network card ip address. cause:" + e.getMessage());
        }
        log.error("Could not get local host ip address, will use 127.0.0.1 instead.");
        return localAddress;
    }

    private static boolean isValidHostAddress(InetAddress address) {
        if (address == null || address.isLoopbackAddress()) {
            return false;
        }
        String name = address.getHostAddress();
        return (name != null && !EMPTY_IP.equals(name) && !LOCALHOST_IP.equals(name) && IP_PATTERN.matcher(name)
                .matches());
    }

    public static void main(String[] args) {
        System.out.println(getHostIp());
    }
}