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A quick developing framewort for internet company
/**
* Copyright (C) 2016 - 2030 youtongluan.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.yx.conf;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;
import java.util.function.Predicate;
import org.yx.common.matcher.BooleanMatcher;
import org.yx.common.matcher.Matchers;
import org.yx.common.matcher.WildcardMatcher;
import org.yx.log.RawLog;
import org.yx.util.CollectionUtil;
import org.yx.util.StringUtil;
public final class LocalhostUtil {
private static String localIp = null;
private static String[] localIps = null;
private static Predicate matcher = defaultMatcher();
private static Predicate defaultMatcher() {
Predicate m = Matchers.createWildcardMatcher("10.*,172.*,16.*,192.*,168.*", 1);
Predicate not1 = Matchers.createWildcardMatcher("*.1", 1).negate();
return m.and(not1);
}
private static boolean isValid(InetAddress ia) {
if (ia instanceof Inet6Address) {
return false;
}
return !ia.isAnyLocalAddress() && !ia.isLoopbackAddress();
}
public static synchronized boolean setLocalIp(String ip) {
if (ip == null) {
ip = "";
}
try {
ip = StringUtil.toLatin(ip).trim();
if (ip.contains(WildcardMatcher.WILDCARD) || ip.contains(",")) {
matcher = Matchers.createWildcardMatcher(ip, 1);
resetLocalIp();
return true;
}
matcher = defaultMatcher();
if (ip.length() > 0) {
localIp = ip;
} else {
resetLocalIp();
}
return true;
} catch (Exception e) {
RawLog.error("sumk.conf", e.getMessage(), e);
return false;
}
}
public static String getLocalIP() {
if (localIp != null) {// localIp不会从非null变为null
return localIp;
}
resetLocalIp();
return localIp;
}
private synchronized static void resetLocalIp() {
try {
String ip = getLocalIP0();
if (ip != null && ip.length() > 0) {
localIp = ip;
return;
}
} catch (Exception e) {
RawLog.error("sumk.conf", e.getMessage(), e);
}
if (localIp == null) {
localIp = "0.0.0.0";
}
}
private static String getLocalIP0() throws Exception {
String[] ips = getLocalIps();
Predicate matcher = LocalhostUtil.matcher;
if (matcher == null) {
matcher = BooleanMatcher.TRUE;
}
for (String ip : ips) {
if (matcher.test(ip)) {
return ip;
}
}
if (ips.length > 0) {
RawLog.warn("sumk.conf", "没有合适ip,使用第一个ip,列表为:" + Arrays.toString(ips));
return ips[0];
}
RawLog.warn("sumk.conf", "找不到任何ip,使用0.0.0.0");
return "0.0.0.0";
}
private static synchronized String[] getLocalIps() {
if (localIps != null) {
return localIps;
}
List ipList = new ArrayList();
try {
Enumeration> e1 = (Enumeration>) NetworkInterface.getNetworkInterfaces();
while (e1.hasMoreElements()) {
NetworkInterface ni = (NetworkInterface) e1.nextElement();
if (!isUp(ni)) {
continue;
}
Enumeration> e2 = ni.getInetAddresses();
while (e2.hasMoreElements()) {
InetAddress ia = (InetAddress) e2.nextElement();
if (isValid(ia)) {
ipList.add(ia.getHostAddress());
}
}
}
} catch (SocketException e) {
RawLog.error("sumk.conf", e.getMessage(), e);
}
if (ipList.isEmpty()) {
return new String[0];
}
localIps = ipList.toArray(new String[0]);
return localIps;
}
/**
* 网卡是否有效
*
* @param ni
* @return
* @throws SocketException
*/
private static boolean isUp(NetworkInterface ni) throws SocketException {
return (!ni.isVirtual()) && ni.isUp() && (!ni.isLoopback());
}
public static List getLocalIPList() {
return CollectionUtil.unmodifyList(getLocalIps());
}
}
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