如何读取客户端机器的IPV4地址？

Question

How can I read client's machine IP address from browser? Specially I need to do it for Internet Explorer as we're running our application for intranet. I can get machine name using below code -

var network = new ActiveXObject('WScript.Network');
console.log(network.computerName);

Any solution/idea is much appreciated. I am fine with applet/any server side coding. Thanks.

Answer 1

Any online service can be used such as this freegeoip.net :

 $.ajax({ url: '//freegeoip.net/json/', datatype: 'json', method: 'get', success: function(data) { $('pre').html("IP Addr::::" + data.ip); } });

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <pre></pre>

Answer 2

One should use this if client is behind a proxy or firewall

request.getHeader("X-FORWARDED-FOR")

If Client is not using proxy or is not behind any firewall than

request.getRemoteAddr();

should work fine SO finally summing up the whole code should be

String ipAddress  = request.getHeader("X-FORWARDED-FOR");
if(ipAddress == null)
{
  ipAddress = request.getRemoteAddr();
}
System.out.println("ipAddress:"+ipAddress);

You should checkout these links jsp get ip address http://www.coderanch.com/t/293684/JSP/java/client-IP-address-Domain-Java

Answer 3

i dont know if you could do that using ActiveXObject, but if you could include server side? with php you could achieved it using

$ip=$_SERVER['REMOTE_ADDR'];

or java/jsp using

<%=request.getRemoteAddr()%>