Nginx转发请求获取不到请求方真实ip

客官°小女子只卖身不卖艺 2023-06-30 06:57 53阅读 0赞

业务需要，获取请求方的ip，代码实现

public static String getIpAddr(HttpServletRequest request) {
            String ipAddress = null;
            try {
                ipAddress = request.getHeader("x-forwarded-for");
                if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                    ipAddress = request.getHeader("Proxy-Client-IP");
                }
                if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                    ipAddress = request.getHeader("WL-Proxy-Client-IP");
                }
                if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
                    ipAddress = request.getRemoteAddr();
                    if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
                        // 根据网卡取本机配置的IP
                        InetAddress inet = null;
                        try {
                            inet = InetAddress.getLocalHost();
                        } catch (UnknownHostException e) {
                            e.printStackTrace();
                        }
                        ipAddress = inet.getHostAddress();
                    }
                }
                // 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
                if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
                                                                    // = 15
                    if (ipAddress.indexOf(",") > 0) {
                        ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                    }
                }
            } catch (Exception e) {
                ipAddress="";
            }
            // ipAddress = this.getRequest().getRemoteAddr();
            
            return ipAddress;
        }

但实际操作过程中获取的都是云服务器自身的ip  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xlaXN1cmVfbGlmZQ_size_16_color_FFFFFF_t_70]  
云服务器的ip  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xlaXN1cmVfbGlmZQ_size_16_color_FFFFFF_t_70 1]  
客户端实际ip是：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xlaXN1cmVfbGlmZQ_size_16_color_FFFFFF_t_70 2]  
请求转发用的是Nginx，考虑可能是没有将请求方真实ip传递给后端  
修改配置文件nginx.conf  
将

location /api {
            proxy_pass http://127.0.0.1:8181/;
            #以下为新增
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;  #获取客户端真实IP
            proxy_set_header REMOTE-HOST $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

修改后保存，检测文件是否正常

/usr/local/nginx/sbin/nginx -t

没问题，重新加载文件

/usr/local/nginx/sbin/nginx -s reload

再测试就没问题了

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