gpio.mode(3,gpio.OUTPUT)
gpio.mode(4,gpio.OUTPUT)
gpio.write(3,gpio.LOW)
gpio.write(4,gpio.LOW)
srv=net.createServer(net.TCP) 
srv:listen(80, function(conn) 
    local responseBytes = 0
    local method=""
    local url=""
    local vars=""
    conn:on("receive",function(conn, payload)
        _, _, method, url, vars = string.find(payload, "([A-Z]+) /([^?]*)%??(.*) HTTP")
        parse_wifi_credentials(vars)                       
        if url == "favicon.ico" then
            conn:send("HTTP/1.1 404 file not found")
            responseBytes = -1
            return
        end    
        url="leds.html"
        responseBytes = 0
        conn:send("HTTP/1.1 200 OK\r\n\r\n")
    end)
    conn:on("sent",function(conn) 
        if responseBytes>=0 and method=="GET" then
            if file.open(url, "r") then            
                file.seek("set", responseBytes)
                local line=file.read()
                file.close()
                if line then
                    conn:send(line)
                    responseBytes = responseBytes + string.len(line)
                    return
                end
            end        
        end
        conn:close() 
    end)
end)
function parse_wifi_credentials(vars)
    if vars == nil or vars == "" then
        return false
    end
    if vars == "LED1=TURN+ON" then
         gpio.write(3,gpio.HIGH)
    end
    if vars == "LED1=TURN+OFF" then
         gpio.write(3,gpio.LOW)     
    end
    if vars == "LED2=TURN+ON" then
         gpio.write(4,gpio.HIGH)
    end
    if vars == "LED2=TURN+OFF" then
         gpio.write(4,gpio.LOW)     
    end
    return true
end