java获取请求主机的真实ip
2017-10-19 09:27
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获取客户端的IP地址的方法是:request.getRemoteAddr(),这种方法在大部分情况下都是有效的。但是在通过了 Apache,Nagix等反向代理软件就不能获取到客户端的真实IP地址了。如果使用了反向代理软件,用 request.getRemoteAddr()方法获取的IP地址是:127.0.0.1或 192.168.1.110,而并不是客户端的真实IP。
经过代理以后,由于在客户端和服务之间增加了中间层,因此服务器无法直接拿到客户端的 IP,服务器端应用也无法直接通过转发请求的地址返回给客户端。但是在转发请求的HTTP头信息中,增加了X-FORWARDED-FOR信息。用以跟踪原有的客户端
IP地址和原来客户端请求的服务器地址。
package com.lm.b2c.core.util;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
@Component
public class IPHelper {
private static final Logger LOG = LoggerFactory.getLogger(IPHelper.class);
/**
* 获取请求主机IP地址,如果通过代理进来,则透过防火墙获取真实IP地址;
*
* @param request
* @return
* @throws IOException
*/
public static String getIpAddress(HttpServletRequest request) {
// 获取请求主机IP地址,如果通过代理进来,则透过防火墙获取真实IP地址
String ip = request.getHeader("X-Forwarded-For");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - X-Forwarded-For - String ip=" + ip);
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - WL-Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - HTTP_CLIENT_IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - HTTP_X_FORWARDED_FOR - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - getRemoteAddr - String ip=" + ip);
}
}
} else if (ip.length() > 15) {
String[] ips = ip.split(",");
for (int index = 0; index < ips.length; index++) {
String strIp = (String) ips[index];
if (!("unknown".equalsIgnoreCase(strIp))) {
ip = strIp;
break;
}
}
}
return ip;
}
}
经过代理以后,由于在客户端和服务之间增加了中间层,因此服务器无法直接拿到客户端的 IP,服务器端应用也无法直接通过转发请求的地址返回给客户端。但是在转发请求的HTTP头信息中,增加了X-FORWARDED-FOR信息。用以跟踪原有的客户端
IP地址和原来客户端请求的服务器地址。
package com.lm.b2c.core.util;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
@Component
public class IPHelper {
private static final Logger LOG = LoggerFactory.getLogger(IPHelper.class);
/**
* 获取请求主机IP地址,如果通过代理进来,则透过防火墙获取真实IP地址;
*
* @param request
* @return
* @throws IOException
*/
public static String getIpAddress(HttpServletRequest request) {
// 获取请求主机IP地址,如果通过代理进来,则透过防火墙获取真实IP地址
String ip = request.getHeader("X-Forwarded-For");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - X-Forwarded-For - String ip=" + ip);
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - WL-Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - HTTP_CLIENT_IP - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - HTTP_X_FORWARDED_FOR - String ip=" + ip);
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
if (LOG.isInfoEnabled()) {
LOG.info("getIpAddress(HttpServletRequest) - getRemoteAddr - String ip=" + ip);
}
}
} else if (ip.length() > 15) {
String[] ips = ip.split(",");
for (int index = 0; index < ips.length; index++) {
String strIp = (String) ips[index];
if (!("unknown".equalsIgnoreCase(strIp))) {
ip = strIp;
break;
}
}
}
return ip;
}
}
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