ESP8266 WebServer

wifi.setmode(wifi.STATION)
wifi.sta.config("YourSSID","YourPASSWORD")
print(wifi.sta.getip())
rele = 1;
gpio.mode(rele, gpio.OUTPUT)

srv=net.createServer(net.TCP)
srv:listen(80,function(conn)
    conn:on("receive", function(client,request)
        local buf = "";
        local _, _, method, path, vars = string.find(request, "([A-Z]+) (.+)?(.+) HTTP");
        if(method == nil)then
            _, _, method, path = string.find(request, "([A-Z]+) (.+) HTTP");
        end
        local _GET = {}
        if (vars ~= nil)then
            for k, v in string.gmatch(vars, "(%w+)=(%w+)&*") do
                _GET[k] = v
            end
        end
        buf = buf.."<h1> ESP8266 Web Server</h1>";
        buf = buf.."<p><a href=\"?rele=ON\"><button>OPEN</button></a></p>";

        local _on,_off = "",""
        if(_GET.rele == "ON")then
              print("Gate Open");
              gpio.write(rele, gpio.HIGH);
             tmr.alarm(0, 400, 0, function() gpio.write(rele, gpio.LOW); print("Rele OFF"); end )
        end
        client:send(buf);
        client:close();
        collectgarbage();
    end)
end)