Web Turtles

-- WEB TOTLES!
-- Korbin Ancell 1/25/2016

local direction = 'f'
local headers = {
    ["User-Agent"] = "turtle",
    ["firstTime"] = "true"
}

function clear()
    term.clear()
    term.setCursorPos(1,1)
end

clear()
print("Waiting for Scottie to beam down the next instruction")

local input = http.get("http://zsi.duckdns.org/webturtle.php", headers)
headers["firstTime"] = "false"

while(true) do
    while(true) do

        sleep(.5)
        input = http.get("http://zsi.duckdns.org/webturtle.php", headers)

        local msg = input.readAll()

        if msg == "nil" then break end

    --Movement--
        if msg == "f" then turtle.forward() break end
        if msg == "b" then turtle.back() break end
        if msg == "r" then turtle.turnRight() break end
        if msg == "l" then turtle.turnLeft() break end
        if msg == "u" then turtle.up() break end
        if msg == "d" then turtle.down() break end

    --Actions--
        if msg == "m" then
            if direction == "f" then turtle.dig() break end
            if direction == "u" then turtle.digUp() break end
            if direction == "d" then turtle.digDown() break end
        end

        if msg == "place" then
            if direction == "f" then turtle.place() break end
            if direction == "u" then turtle.placeUp() break end
            if direction == "d" then turtle.placeDown() break end
        end

        if msg == "pickup" then
            if direction == "f" then turtle.suck() break end
            if direction == "u" then turtle.suckUp() break end
            if direction == "d" then turtle.suckDown() break end
        end

    --Directions--
        if msg =="mf" then direction ="f" break end
        if msg =="md" then direction ="d" break end
        if msg =="mu" then direction ="u" break end

    --Exit--
        if msg =="exit" then os.reboot() end
    end
end