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Dahua ICC Open API SDK for Java
package com.dahuatech.hutool.core.net;
import com.dahuatech.hutool.core.collection.CollUtil;
import com.dahuatech.hutool.core.collection.CollectionUtil;
import com.dahuatech.hutool.core.exceptions.UtilException;
import com.dahuatech.hutool.core.io.IORuntimeException;
import com.dahuatech.hutool.core.io.IoUtil;
import com.dahuatech.hutool.core.lang.Filter;
import com.dahuatech.hutool.core.lang.Validator;
import com.dahuatech.hutool.core.util.RandomUtil;
import com.dahuatech.hutool.core.util.StrUtil;
import java.io.IOException;
import java.io.OutputStream;
import java.net.*;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import java.util.*;
/**
* 网络相关工具
*
* @author xiaoleilu
*/
public class NetUtil {
public static final String LOCAL_IP = "127.0.0.1";
/** 默认最小端口，1024 */
public static final int PORT_RANGE_MIN = 1024;
/** 默认最大端口，65535 */
public static final int PORT_RANGE_MAX = 0xFFFF;
/**
* 根据long值获取ip v4地址
*
* @param longIP IP的long表示形式
* @return IP V4 地址
*/
public static String longToIpv4(long longIP) {
final StringBuilder sb = StrUtil.builder();
// 直接右移24位
sb.append((longIP >>> 24));
sb.append(".");
// 将高8位置0，然后右移16位
sb.append(((longIP & 0x00FFFFFF) >>> 16));
sb.append(".");
sb.append(((longIP & 0x0000FFFF) >>> 8));
sb.append(".");
sb.append((longIP & 0x000000FF));
return sb.toString();
}
/**
* 根据ip地址计算出long型的数据
*
* @param strIP IP V4 地址
* @return long值
*/
public static long ipv4ToLong(String strIP) {
if (Validator.isIpv4(strIP)) {
long[] ip = new long[4];
// 先找到IP地址字符串中.的位置
int position1 = strIP.indexOf(".");
int position2 = strIP.indexOf(".", position1 + 1);
int position3 = strIP.indexOf(".", position2 + 1);
// 将每个.之间的字符串转换成整型
ip[0] = Long.parseLong(strIP.substring(0, position1));
ip[1] = Long.parseLong(strIP.substring(position1 + 1, position2));
ip[2] = Long.parseLong(strIP.substring(position2 + 1, position3));
ip[3] = Long.parseLong(strIP.substring(position3 + 1));
return (ip[0] << 24) + (ip[1] << 16) + (ip[2] << 8) + ip[3];
}
return 0;
}
/**
* 检测本地端口可用性
* 来自org.springframework.util.SocketUtils
*
* @param port 被检测的端口
* @return 是否可用
*/
public static boolean isUsableLocalPort(int port) {
if (false == isValidPort(port)) {
// 给定的IP未在指定端口范围中
return false;
}
// issue#765@Github, 某些绑定非127.0.0.1的端口无法被检测到
try (ServerSocket ss = new ServerSocket(port)) {
ss.setReuseAddress(true);
} catch (IOException ignored) {
return false;
}
try (DatagramSocket ds = new DatagramSocket(port)) {
ds.setReuseAddress(true);
} catch (IOException ignored) {
return false;
}
return true;
}
/**
* 是否为有效的端口
* 此方法并不检查端口是否被占用
*
* @param port 端口号
* @return 是否有效
*/
public static boolean isValidPort(int port) {
// 有效端口是0～65535
return port >= 0 && port <= PORT_RANGE_MAX;
}
/**
* 查找1024~65535范围内的可用端口
* 此方法只检测给定范围内的随机一个端口，检测65535-1024次
* 来自org.springframework.util.SocketUtils
*
* @return 可用的端口
* @since 4.5.4
*/
public static int getUsableLocalPort() {
return getUsableLocalPort(PORT_RANGE_MIN);
}
/**
* 查找指定范围内的可用端口，最大值为65535
* 此方法只检测给定范围内的随机一个端口，检测65535-minPort次
* 来自org.springframework.util.SocketUtils
*
* @param minPort 端口最小值（包含）
* @return 可用的端口
* @since 4.5.4
*/
public static int getUsableLocalPort(int minPort) {
return getUsableLocalPort(minPort, PORT_RANGE_MAX);
}
/**
* 查找指定范围内的可用端口
* 此方法只检测给定范围内的随机一个端口，检测maxPort-minPort次
* 来自org.springframework.util.SocketUtils
*
* @param minPort 端口最小值（包含）
* @param maxPort 端口最大值（包含）
* @return 可用的端口
* @since 4.5.4
*/
public static int getUsableLocalPort(int minPort, int maxPort) {
final int maxPortExclude = maxPort + 1;
int randomPort;
for (int i = minPort; i < maxPortExclude; i++) {
randomPort = RandomUtil.randomInt(minPort, maxPortExclude);
if (isUsableLocalPort(randomPort)) {
return randomPort;
}
}
throw new UtilException(
"Could not find an available port in the range [{}, {}] after {} attempts",
minPort,
maxPort,
maxPort - minPort);
}
/**
* 获取多个本地可用端口
* 来自org.springframework.util.SocketUtils
*
* @param numRequested 尝试次数
* @param minPort 端口最小值（包含）
* @param maxPort 端口最大值（包含）
* @return 可用的端口
* @since 4.5.4
*/
public static TreeSet getUsableLocalPorts(int numRequested, int minPort, int maxPort) {
final TreeSet availablePorts = new TreeSet<>();
int attemptCount = 0;
while ((++attemptCount <= numRequested + 100) && availablePorts.size() < numRequested) {
availablePorts.add(getUsableLocalPort(minPort, maxPort));
}
if (availablePorts.size() != numRequested) {
throw new UtilException(
"Could not find {} available ports in the range [{}, {}]",
numRequested,
minPort,
maxPort);
}
return availablePorts;
}
/**
* 判定是否为内网IP
* 私有IP：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
* 当然，还有127这个网段是环回地址
*
* @param ipAddress IP地址
* @return 是否为内网IP
*/
public static boolean isInnerIP(String ipAddress) {
boolean isInnerIp;
long ipNum = NetUtil.ipv4ToLong(ipAddress);
long aBegin = NetUtil.ipv4ToLong("10.0.0.0");
long aEnd = NetUtil.ipv4ToLong("10.255.255.255");
long bBegin = NetUtil.ipv4ToLong("172.16.0.0");
long bEnd = NetUtil.ipv4ToLong("172.31.255.255");
long cBegin = NetUtil.ipv4ToLong("192.168.0.0");
long cEnd = NetUtil.ipv4ToLong("192.168.255.255");
isInnerIp =
isInner(ipNum, aBegin, aEnd)
|| isInner(ipNum, bBegin, bEnd)
|| isInner(ipNum, cBegin, cEnd)
|| ipAddress.equals(LOCAL_IP);
return isInnerIp;
}
/**
* 相对URL转换为绝对URL
*
* @param absoluteBasePath 基准路径，绝对
* @param relativePath 相对路径
* @return 绝对URL
*/
public static String toAbsoluteUrl(String absoluteBasePath, String relativePath) {
try {
URL absoluteUrl = new URL(absoluteBasePath);
return new URL(absoluteUrl, relativePath).toString();
} catch (Exception e) {
throw new UtilException(
e, "To absolute url [{}] base [{}] error!", relativePath, absoluteBasePath);
}
}
/**
* 隐藏掉IP地址的最后一部分为 * 代替
*
* @param ip IP地址
* @return 隐藏部分后的IP
*/
public static String hideIpPart(String ip) {
return StrUtil.builder(ip.length())
.append(ip, 0, ip.lastIndexOf(".") + 1)
.append("*")
.toString();
}
/**
* 隐藏掉IP地址的最后一部分为 * 代替
*
* @param ip IP地址
* @return 隐藏部分后的IP
*/
public static String hideIpPart(long ip) {
return hideIpPart(longToIpv4(ip));
}
/**
* 构建InetSocketAddress
* 当host中包含端口时（用“：”隔开），使用host中的端口，否则使用默认端口
* 给定host为空时使用本地host（127.0.0.1）
*
* @param host Host
* @param defaultPort 默认端口
* @return InetSocketAddress
*/
public static InetSocketAddress buildInetSocketAddress(String host, int defaultPort) {
if (StrUtil.isBlank(host)) {
host = LOCAL_IP;
}
String destHost;
int port;
int index = host.indexOf(":");
if (index != -1) {
// host:port形式
destHost = host.substring(0, index);
port = Integer.parseInt(host.substring(index + 1));
} else {
destHost = host;
port = defaultPort;
}
return new InetSocketAddress(destHost, port);
}
/**
* 通过域名得到IP
*
* @param hostName HOST
* @return ip address or hostName if UnknownHostException
*/
public static String getIpByHost(String hostName) {
try {
return InetAddress.getByName(hostName).getHostAddress();
} catch (UnknownHostException e) {
return hostName;
}
}
/**
* 获取本机所有网卡
*
* @return 所有网卡，异常返回null
* @since 3.0.1
*/
public static Collection getNetworkInterfaces() {
Enumeration networkInterfaces;
try {
networkInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
return null;
}
return CollectionUtil.addAll(new ArrayList(), networkInterfaces);
}
/**
* 获得本机的IPv4地址列表
* 返回的IP列表有序，按照系统设备顺序
*
* @return IP地址列表 {@link LinkedHashSet}
*/
public static LinkedHashSet localIpv4s() {
final LinkedHashSet localAddressList =
localAddressList(
new Filter() {
@Override
public boolean accept(InetAddress t) {
return t instanceof Inet4Address;
}
});
return toIpList(localAddressList);
}
/**
* 获得本机的IPv6地址列表
* 返回的IP列表有序，按照系统设备顺序
*
* @return IP地址列表 {@link LinkedHashSet}
* @since 4.5.17
*/
public static LinkedHashSet localIpv6s() {
final LinkedHashSet localAddressList =
localAddressList(
new Filter() {
@Override
public boolean accept(InetAddress t) {
return t instanceof Inet6Address;
}
});
return toIpList(localAddressList);
}
/**
* 地址列表转换为IP地址列表
*
* @param addressList 地址{@link Inet4Address} 列表
* @return IP地址字符串列表
* @since 4.5.17
*/
public static LinkedHashSet toIpList(Set addressList) {
final LinkedHashSet ipSet = new LinkedHashSet<>();
for (InetAddress address : addressList) {
ipSet.add(address.getHostAddress());
}
return ipSet;
}
/**
* 获得本机的IP地址列表（包括Ipv4和Ipv6）
* 返回的IP列表有序，按照系统设备顺序
*
* @return IP地址列表 {@link LinkedHashSet}
*/
public static LinkedHashSet localIps() {
final LinkedHashSet localAddressList = localAddressList(null);
return toIpList(localAddressList);
}
/**
* 获取所有满足过滤条件的本地IP地址对象
*
* @param addressFilter 过滤器，null表示不过滤，获取所有地址
* @return 过滤后的地址对象列表
* @since 4.5.17
*/
public static LinkedHashSet localAddressList(Filter addressFilter) {
Enumeration networkInterfaces;
try {
networkInterfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
throw new UtilException(e);
}
if (networkInterfaces == null) {
throw new UtilException("Get network interface error!");
}
final LinkedHashSet ipSet = new LinkedHashSet<>();
while (networkInterfaces.hasMoreElements()) {
final NetworkInterface networkInterface = networkInterfaces.nextElement();
final Enumeration inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
final InetAddress inetAddress = inetAddresses.nextElement();
if (inetAddress != null && (null == addressFilter || addressFilter.accept(inetAddress))) {
ipSet.add(inetAddress);
}
}
}
return ipSet;
}
/**
* 获取本机网卡IP地址，这个地址为所有网卡中非回路地址的第一个
* 如果获取失败调用 {@link InetAddress#getLocalHost()}方法获取。
* 此方法不会抛出异常，获取失败将返回null
* 参考：http://stackoverflow.com/questions/9481865/getting-the-ip-address-of-the-current-machine-using-java
*
* @return 本机网卡IP地址，获取失败返回null
* @since 3.0.7
*/
public static String getLocalhostStr() {
InetAddress localhost = getLocalhost();
if (null != localhost) {
return localhost.getHostAddress();
}
return null;
}
/**
* 获取本机网卡IP地址，规则如下：
*
*
* 1. 查找所有网卡地址，必须非回路（loopback）地址、非局域网地址（siteLocal）、IPv4地址
* 2. 如果无满足要求的地址，调用 {@link InetAddress#getLocalHost()} 获取地址
*
*
* 此方法不会抛出异常，获取失败将返回null
* 见：https://github.com/looly/hutool/issues/428
*
* @return 本机网卡IP地址，获取失败返回null
* @since 3.0.1
*/
public static InetAddress getLocalhost() {
final LinkedHashSet localAddressList =
localAddressList(
new Filter() {
@Override
public boolean accept(InetAddress address) {
// 非loopback地址，指127.*.*.*的地址
return false == address.isLoopbackAddress()
// 非地区本地地址，指10.0.0.0 ~ 10.255.255.255、172.16.0.0 ~ 172.31.255.255、192.168.0.0 ~
// 192.168.255.255
&& false == address.isSiteLocalAddress()
// 需为IPV4地址
&& address instanceof Inet4Address;
}
});
if (CollUtil.isNotEmpty(localAddressList)) {
return CollUtil.get(localAddressList, 0);
}
try {
return InetAddress.getLocalHost();
} catch (UnknownHostException e) {
// ignore
}
return null;
}
/**
* 获得本机MAC地址
*
* @return 本机MAC地址
*/
public static String getLocalMacAddress() {
return getMacAddress(getLocalhost());
}
/**
* 获得指定地址信息中的MAC地址，使用分隔符“-”
*
* @param inetAddress {@link InetAddress}
* @return MAC地址，用-分隔
*/
public static String getMacAddress(InetAddress inetAddress) {
return getMacAddress(inetAddress, "-");
}
/**
* 获得指定地址信息中的MAC地址
*
* @param inetAddress {@link InetAddress}
* @param separator 分隔符，推荐使用“-”或者“:”
* @return MAC地址，用-分隔
*/
public static String getMacAddress(InetAddress inetAddress, String separator) {
if (null == inetAddress) {
return null;
}
byte[] mac;
try {
mac = NetworkInterface.getByInetAddress(inetAddress).getHardwareAddress();
} catch (SocketException e) {
throw new UtilException(e);
}
if (null != mac) {
final StringBuilder sb = new StringBuilder();
String s;
for (int i = 0; i < mac.length; i++) {
if (i != 0) {
sb.append(separator);
}
// 字节转换为整数
s = Integer.toHexString(mac[i] & 0xFF);
sb.append(s.length() == 1 ? 0 + s : s);
}
return sb.toString();
}
return null;
}
/**
* 创建 {@link InetSocketAddress}
*
* @param host 域名或IP地址，空表示任意地址
* @param port 端口，0表示系统分配临时端口
* @return {@link InetSocketAddress}
* @since 3.3.0
*/
public static InetSocketAddress createAddress(String host, int port) {
if (StrUtil.isBlank(host)) {
return new InetSocketAddress(port);
}
return new InetSocketAddress(host, port);
}
/**
* 简易的使用Socket发送数据
*
* @param host Server主机
* @param port Server端口
* @param isBlock 是否阻塞方式
* @param data 需要发送的数据
* @throws IORuntimeException IO异常
* @since 3.3.0
*/
public static void netCat(String host, int port, boolean isBlock, ByteBuffer data)
throws IORuntimeException {
try (SocketChannel channel = SocketChannel.open(createAddress(host, port))) {
channel.configureBlocking(isBlock);
channel.write(data);
} catch (IOException e) {
throw new IORuntimeException(e);
}
}
/**
* 使用普通Socket发送数据
*
* @param host Server主机
* @param port Server端口
* @param data 数据
* @throws IORuntimeException IO异常
* @since 3.3.0
*/
public static void netCat(String host, int port, byte[] data) throws IORuntimeException {
OutputStream out = null;
try (Socket socket = new Socket(host, port)) {
out = socket.getOutputStream();
out.write(data);
out.flush();
} catch (IOException e) {
throw new IORuntimeException(e);
} finally {
IoUtil.close(out);
}
}
/**
* 是否在CIDR规则配置范围内
* 方法来自：【成都】小邓
*
* @param ip 需要验证的IP
* @param cidr CIDR规则
* @return 是否在范围内
* @since 4.0.6
*/
public static boolean isInRange(String ip, String cidr) {
String[] ips = StrUtil.splitToArray(ip, '.');
int ipAddr =
(Integer.parseInt(ips[0]) << 24)
| (Integer.parseInt(ips[1]) << 16)
| (Integer.parseInt(ips[2]) << 8)
| Integer.parseInt(ips[3]);
int type = Integer.parseInt(cidr.replaceAll(".*/", ""));
int mask = 0xFFFFFFFF << (32 - type);
String cidrIp = cidr.replaceAll("/.*", "");
String[] cidrIps = cidrIp.split("\\.");
int cidrIpAddr =
(Integer.parseInt(cidrIps[0]) << 24)
| (Integer.parseInt(cidrIps[1]) << 16)
| (Integer.parseInt(cidrIps[2]) << 8)
| Integer.parseInt(cidrIps[3]);
return (ipAddr & mask) == (cidrIpAddr & mask);
}
/**
* Unicode域名转puny code
*
* @param unicode Unicode域名
* @return puny code
* @since 4.1.22
*/
public static String idnToASCII(String unicode) {
return IDN.toASCII(unicode);
}
/**
* 从多级反向代理中获得第一个非unknown IP地址
*
* @param ip 获得的IP地址
* @return 第一个非unknown IP地址
* @since 4.4.1
*/
public static String getMultistageReverseProxyIp(String ip) {
// 多级反向代理检测
if (ip != null && ip.indexOf(",") > 0) {
final String[] ips = ip.trim().split(",");
for (String subIp : ips) {
if (false == isUnknow(subIp)) {
ip = subIp;
break;
}
}
}
return ip;
}
/**
* 检测给定字符串是否为未知，多用于检测HTTP请求相关
*
* @param checkString 被检测的字符串
* @return 是否未知
* @since 4.4.1
*/
public static boolean isUnknow(String checkString) {
return StrUtil.isBlank(checkString) || "unknown".equalsIgnoreCase(checkString);
}
// -----------------------------------------------------------------------------------------
// Private method start
/**
* 指定IP的long是否在指定范围内
*
* @param userIp 用户IP
* @param begin 开始IP
* @param end 结束IP
* @return 是否在范围内
*/
private static boolean isInner(long userIp, long begin, long end) {
return (userIp >= begin) && (userIp <= end);
}
// -----------------------------------------------------------------------------------------
// Private method end
}