php mp3防盗链

<?php
// 生成Token
function generateToken($file) {
    $token = md5($file . time());
    $_SESSION['token_' . $file] = $token;
    return $token;
}

// 验证Token
function verifyToken($file, $token) {
    if (isset($_SESSION['token_' . $file]) && $_SESSION['token_' . $file] == $token) {
        return true;
    }
    return false;
}

// 检查请求
if ($_SERVER['REQUEST_METHOD'] == 'GET' && isset($_GET['file'])) {
    $file = $_GET['file'];
    $token = isset($_GET['token']) ? $_GET['token'] : '';

    if (verifyToken($file, $token)) {
        header('Content-Type: audio/mpeg');
        header('Content-Length: ' . filesize($file));
        readfile($file);
    } else {
        header('HTTP/1.0 403 Forbidden');
        echo 'Invalid Token';
    }
} else {
    $file = 'path/to/your/audio.mp3';
    $token = generateToken($file);
    echo '<a href="download.php?file=' . urlencode($file) . '&token=' . urlencode($token) . '">Download MP3</a>';
}
?>

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");
header("Access-Control-Allow-Headers: Content-Type");