!53 修复异步操作导致的request null,IP获取错误

Merge pull request !53 from TwelveT/N/A

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/ip/IpUtils.java

@@ -14,6 +14,11 @@ public class IpUtils
 {
     public static String getIpAddr(HttpServletRequest request)
     {
+
+        if(request == null){
+            return null;
+        }
+
         String ip = null;
 
         // X-Forwarded-For：Squid 服务代理