86 lines
3.4 KiB
Java
86 lines
3.4 KiB
Java
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package com.njcn.gateway.utils;
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import cn.hutool.core.util.StrUtil;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.server.reactive.ServerHttpRequest;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import java.util.Optional;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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/**
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* @author hongawen
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* @version 1.0.0
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* @date 2021年05月25日 11:25
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*/
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@Slf4j
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public class IpUtils {
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private static final String UNKNOWN = "unknown";
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private static final String LOCALHOST_IPV4 = "127.0.0.1";
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private static final String LOCALHOST_IPV6 = "0:0:0:0:0:0:0:1";
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private static final String SEPARATOR = ",";
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private static final String HEADER_X_FORWARDED_FOR = "x-forwarded-for";
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private static final String HEADER_PROXY_CLIENT_IP = "Proxy-Client-IP";
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private static final String HEADER_WL_PROXY_CLIENT_IP = "WL-Proxy-Client-IP";
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private static final int IP_LEN = 15;
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/**
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* 获取用户真实IP地址，不直接使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
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* <p>
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* 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
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* 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
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* <p>
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* 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
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* 192.168.1.100
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* <p>
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* 用户真实IP为： 192.168.1.110
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*/
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public static String getRealIpAddress(ServerHttpRequest request) {
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HttpHeaders headers = request.getHeaders();
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String ipAddress = headers.getFirst(HEADER_X_FORWARDED_FOR);
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if (StrUtil.isBlankIfStr(ipAddress) || UNKNOWN.equalsIgnoreCase(ipAddress)) {
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ipAddress = headers.getFirst(HEADER_PROXY_CLIENT_IP);
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}
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if (StrUtil.isBlankIfStr(ipAddress) || UNKNOWN.equalsIgnoreCase(ipAddress)) {
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ipAddress = headers.getFirst(HEADER_WL_PROXY_CLIENT_IP);
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}
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if (StrUtil.isBlankIfStr(ipAddress) || UNKNOWN.equalsIgnoreCase(ipAddress)) {
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ipAddress = Optional.ofNullable(request.getRemoteAddress())
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.map(address -> address.getAddress().getHostAddress())
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.orElse("");
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if (LOCALHOST_IPV4.equals(ipAddress) || LOCALHOST_IPV6.equals(ipAddress)) {
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// 根据网卡取本机配置的IP
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try {
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InetAddress inet = InetAddress.getLocalHost();
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ipAddress = inet.getHostAddress();
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} catch (UnknownHostException e) {
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log.error("解析请求IP失败,{}", Stream.of(e.getStackTrace()).map(StackTraceElement::toString).collect(Collectors.joining(StrUtil.CRLF)));
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}
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}
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}
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// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
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if (ipAddress != null && ipAddress.length() > IP_LEN) {
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int index = ipAddress.indexOf(SEPARATOR);
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if (index > 0) {
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ipAddress = ipAddress.substring(0, index);
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}
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}
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return ipAddress;
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}
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/**
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* 获取客户端端口
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*/
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public static Integer getPort(ServerHttpRequest request) {
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return request.getRemoteAddress().getPort();
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}
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}
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