Java获取客户端的真实IP地址_转转转

Java获取客户端的真实IP地址

文章分类:Java编程

像移动网关一样，iisforward这个ISAPI过滤器也会对request对象进行再包装，附加一些WLS要用的头信息。这种情况下，直接用request.getRemoteAddr()是无法取到真正的客户IP的。

实际的iisforward附加头如下：

 WL-Proxy-Client-IP= 211.161 . 1.239
 Proxy-Client-IP= 211.161 . 1.239
 X-Forwarded-For= 211.161 . 1.239
 WL-Proxy-Client-Keysize=
 WL-Proxy-Client-Secretkeysize=
 X-WebLogic-Request-ClusterInfo= true
 X-WebLogic-KeepAliveSecs= 30
 X-WebLogic-Force-JVMID=- 327089098
 WL-Proxy-SSL= false

综上，正确作法如下：

 private  String getIpAddr() {
      String ipAddress =  null ;
       //ipAddress = this.getRequest().getRemoteAddr();
      ipAddress =  this .getRequest().getHeader( "x-forwarded-for" );
       if (ipAddress ==  null  || ipAddress.length() ==  0  ||  "unknown" .equalsIgnoreCase(ipAddress)) {
       ipAddress =  this .getRequest().getHeader( "Proxy-Client-IP" );
      }
       if (ipAddress ==  null  || ipAddress.length() ==  0  ||  "unknown" .equalsIgnoreCase(ipAddress)) {
          ipAddress =  this .getRequest().getHeader( "WL-Proxy-Client-IP" );
      }
       if (ipAddress ==  null  || ipAddress.length() ==  0  ||  "unknown" .equalsIgnoreCase(ipAddress)) {
       ipAddress =  this .getRequest().getRemoteAddr();
        if (ipAddress.equals( "127.0.0.1" )){
         //根据网卡取本机配置的IP
        InetAddress inet= null ;
      try  {
      inet = InetAddress.getLocalHost();
     }  catch  (UnknownHostException e) {
      e.printStackTrace();
     }
     ipAddress= inet.getHostAddress();
       }

      }

       //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 ){  //"***.***.***.***".length() = 15
           if (ipAddress.indexOf( "," )> 0 ){
              ipAddress = ipAddress.substring( 0 ,ipAddress.indexOf( "," ));
          }
      }
       return  ipAddress;
   }