增加頂級過濾器
`@javax.servlet.annotation.WebFilter(filterName = "sessionFilter", urlPatterns = "/webSocket/*")
@Order(1)
@Slf4j
public class WebFilter implements Filter {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) servletRequest;
HttpSession session = req.getSession();
session.setAttribute("user_ip", req.getRemoteHost());
log.info("user_ip===={}",req.getRemoteHost());
filterChain.doFilter(servletRequest, servletResponse);
}
public 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")) {
// 根據網路卡取本機配置的IP
InetAddress inet = null;
try {
inet = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
e.printStackTrace();
}
ipAddress = inet.getHostAddress();
}
}
// 對於透過多個代理的情況，第一個IP為客戶端真實IP,多個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="";
}
return ipAddress;
}
}`
在啟動類上，需要加上@ServletComponentScan 用來註冊這個Filter，直接使用@Component會導致urlPatterns 失效