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;
  }