utils updated

OmgPianoTranscription/pianotranscriptioncli/src/main/java/com/pianotranscriptioncli/utils/HttpUtils.java

@@ -0,0 +1,31 @@
+package com.pianotranscriptioncli.utils;
+
+import javax.servlet.http.HttpServletRequest;
+
+public class HttpUtils {
+
+ /**
+ * Get the IP address of client machine.
+ * @param request
+ * @return IP address
+ */
+ public static String getIpAddr(HttpServletRequest request) {
+ String 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();
+ }
+ // 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) {
+ if (ipAddress.indexOf(",") > 0) {
+ ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
+ }
+ }
+ return ipAddress;
+ }
+}