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public String getIpAddr(HttpServletRequest request) {      
      String ip = request.getHeader("x-forwarded-for");      
      if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {      
         ip = request.getHeader("Proxy-Client-IP");      
     }      
      if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {      
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