服务器获取客户端ip_获取客户端真实IP

在Web应用开发中，获取客户端IP地址是一项关键任务，但由于代理服务器、负载均衡器和其他中间件的存在，标准方法并不总能提供准确的结果，本文将深入讨论不同场景下获取客户端IP地址的方法，以及如何适应各种网络架构和中间件配置。

1、代理服务器和真实IP地址：

在现代Web应用中，通过代理服务器传递请求变得普遍，这可能导致获取客户端IP地址变得复杂，我们将探讨代理服务器的作用，以及如何在Java中使用HttpServletRequest获取真实IP地址。

server { listen 80; server_name yourdomain.com; location / { proxy_pass http://your_backend_server; # Set the "XForwardedFor" header to the client’s real IP address proxy_set_header XForwardedFor $proxy_add_x_forwarded_for; proxy_set_header Host $host; proxy_set_header XRealIP $remote_addr; # Additional proxy settings, if needed # … # Other server configurations # … }} import javax.servlet.http.HttpServletRequest;public class IPAddressExtractor { public static String getIpAddress(HttpServletRequest request) { String[] headersToCheck = {"XForwardedFor", "ProxyClientIP", "WLProxyClientIP"}; for (String header : headersToCheck) { String ipAddress = request.getHeader(header); if (ipAddress != null && !ipAddress.isEmpty() && !"unknown".equalsIgnoreCase(ipAddress)) { // Extract the first IP address from the commaseparated list if multiple addresses are present if (ipAddress.contains(",")) { return ipAddress.split(",")[0].trim(); } else { return ipAddress.trim(); } } } // If no valid IP found in headers, fallback to the default method return request.getRemoteAddr(); } public static void main(String[] args) { // Assuming you have an HttpServletRequest object named ‘request’ HttpServletRequest request = /* your HttpServletRequest object */; String ipAddress = getIpAddress(request); System.out.println("Client IP Address: " + ipAddress); }}