有时,需要获取客户端真实ip,但由于nginx转发后,已经不是真实ip地址
解决方式如下:在你的nginx配置下加上如下配置即可
location /{
proxy_pass http://127.0.0.1:8080;//转发到你的业务服务器服务器
proxy_set_header x-forwarded-for $remote_addr;//把真实ip设置到请求头里面
}
主要是:
proxy_set_header x-forwarded-for $remote_addr;//把真实ip设置到请求头里面
说明:
REMOTE_ADDR
表示发出请求的远程主机的 IP 地址,remote_addr代表客户端的IP,但它的值不是由客户端提供的,而是服务端根据客户端的ip指定的,当你的浏览器访问某个网站时,假设中间没有任何代理,那么网站的web服务器(Nginx,Apache等)就会把remote_addr设为你的机器IP,如果你用了某个代理,那么你的浏览器会先访问这个代理,然后再由这个代理转发到网站,这样web服务器就会把remote_addr设为这台代理机器的IP
x_forwarded_for
简称XFF头,它代表客户端,也就是HTTP的请求端真实的IP,只有在通过了HTTP 代理或者负载均衡服务器时才会添加该项,正如上面所述,当你使用了代理时,web服务器就不知道你的真实IP了,为了避免这个情况,代理服务器通常会增加一个叫做x_forwarded_for的头信息,把连接它的客户端IP(即你的上网机器IP)加到这个头信息里,这样就能保证网站的web服务器能获取到真实IP
二、服务端java方式获取ip代码:
public static String getClientIpAddr(HttpServletRequest request) {
String ip = request.getHeader("X-Forwarded-For");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_CLUSTER_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_FORWARDED");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_VIA");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("REMOTE_ADDR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
标签:nginx,ip,转发,request,unknown,equalsIgnoreCase,length,IP From: https://blog.51cto.com/u_16152740/6426763