Browsers\Javascript - any way to know the user's current IP

Question

I'm writing a browser extension using Kango framework.

As part of its functionality it must know where the user is located. I have that part covered with an API, but the said API requires an ip address as one of the params.

Is there a way to sort of internally see what it is (or what it was last time) or do I have to make a separate call to ANOTHER service (a simple php page I suppose) to figure out what the ip is?

The extension will make another call after the location is established. Should I be irked about 3 separate calls?

Thanks.

Duplicate: http://stackoverflow.com/questions/391979/get-client-ip-using-just-javascript — TheBlackBenzKid, May 26 '12 at 10:59
It is possible, but... MESSY. Best way is server side first and then load the IP from Server side script (php/asp) etc — TheBlackBenzKid, May 26 '12 at 11:00

Hidde · Accepted Answer · 2012-05-26T11:10:05.453

3

Javascript:

$.ajax({
        type: "POST",
        url: "getIP.php",
        data: "",
        dataType: 'json',
        success: function(ret) {
           alert("ip = " + ret);
        },
        error: function (xhr, ajaxOptions, thrownError) {
            console.error(xhr.responseText);
            console.error(thrownError);
        } 
    });

PHP:

if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
    $IP = $_SERVER['HTTP_X_FORWARDED_FOR'];
else
    $IP = $_SERVER['REMOTE_ADDR'];
echo json_encode($IP);

Sidenote: I am using jQuery here, read the docs here if you don't know how to use it: http://docs.jquery.com/Main_Page

edited May 26 '12 at 11:10

answered May 26 '12 at 11:04

Hidde

11,493
8
43
68

Yeah :P. Although I think he should also think a little himself. – Hidde May 26 '12 at 11:08
I figured that out, don't worry : P – Jake May 28 '12 at 02:09

score 1 · Answer 2 · answered May 26 '12 at 10:55

1

Yes, for security reasons you can't know the IP of the user via Javascript, so you have to rely on a server-side service.

answered May 26 '12 at 10:55

MaxArt

22,200
10
82
81

Browsers\Javascript - any way to know the user's current IP

2 Answers2