<?php
header('Content-Type: application/json');

require_once 'config.php';


$device = $_REQUEST['device'] ?? null;

if (is_null($device)) {
    die(json_encode([
        'status' => 'error',
        'message' => $msg
    ], JSON_UNESCAPED_UNICODE));
}

// 不能超过 128
if (strlen($device) > 128) {
    die(json_encode([
        'status' => 'error',
        'message' => 'device 不能超过 128 个字符'
    ], JSON_UNESCAPED_UNICODE));
}

// get from redis
$data = $redis->get(md5($device));

if (empty($data)) {
    echo json_encode([
        'status' => 'empty',
        'message' => $msg
    ], JSON_UNESCAPED_UNICODE);
} else {
    echo $data;
    $redis->del(md5($device));
}

// delete from redis