RE: Retrieve public IP
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- Subject: RE: Retrieve public IP
- From: Thijs Schreijer <thijs@...>
- Date: 2015年5月25日 07:27:16 +0000
> -----Original Message-----
> From: lua-l-bounces@lists.lua.org [mailto:lua-l-bounces@lists.lua.org] On
> Behalf Of Claudio Mussoni
> Sent: maandag 25 mei 2015 8:19
> To: lua-l@lists.lua.org
> Subject: Retrieve public IP
>
> Hello to everyone,
> I need to get the public address from my router with LUA.
>
> This is a PHP example: $my_public_ip = $_SERVER['REMOTE_ADDR'];
>
> I searched around but I' ve not found examples.
> Someone can help me out?
> Thank's a lot.
> Bye
> Claudio
This is what I came up with for the same issue;
local http = require("socket.http")
local json = require("dkjson")
-----------------------------------------
-- Fetches the external IP.
-- Uses http://ipinfo.io web service.
-- @return string IP address, or `nil + errormsg`
externalip = function()
local resp,code,headers,status = http.request("http://ipinfo.io/json";)
if code ~= 200 then return nil, "Failed fetching external IP; "..tostring(status) end
local data, err = json.decode(resp)
if not data then
return nil, "Failed fetching external IP; "..tostring(err)
end
if data.ip then
return data.ip
else
return nil, "Failed fetching external IP; no ip field was returned"
end
end
relies on LuaSocket and the http://ipinfo.io service.
Thijs