# [メタ情報]
# 識別子: マイライブラリXserverのrdphp_exe
# システム名: マイライブラリXserverのrd.php
# 技術種別: Misc
# 機能名: Misc
# 使用言語: php
# 状態: 実行用
# [/メタ情報]

Xserver
WordPressサーバー
rd.php
/xxxxxxxx.com/public_html/

<?php
// ========================= rd.php (ext-agnostic + diag) =====================
// - id=KJCtDDxe と id=KJCtDDxe.txt の両方で JSON の wpidex=KJCtDDxe をヒットさせる
// - ?diag=1 で内部状態を text/plain で表示（リダイレクトしない）
// - UTF-8 (BOMなし) で保存。先頭/末尾に空白や改行を置かないこと。
// ============================================================================

// 共通: キャッシュ抑止
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Pragma: no-cache");
header("Expires: 0");

// 設定
define('JSON_FILE', '/home/xxxxxxxx/xxxxxxxx.com/public_html/wp-content/uploads/gd_wp_data/dropbox_wp_library.json');

// クエリ
$id   = isset($_GET['id'])   ? trim($_GET['id'])   : '';
$diag = isset($_GET['diag']) ? (int)$_GET['diag'] : 0;

if ($diag) header("Content-Type: text/plain; charset=UTF-8");

// 入力チェック
if ($id === '') {
    if ($diag) echo "ERR: id empty\n";
    http_response_code(400);
    exit;
}

// id 正規化（拡張子除去版と元の両方を候補にする）
$extlist = 'mp4|mov|jpg|jpeg|png|gif|txt|vtt|srt';
$id_norm = preg_replace('/\.(' . $extlist . ')$/i', '', $id);

// JSON 読み込み
$json = @file_get_contents(JSON_FILE);
if ($json === false) {
    if ($diag) echo "ERR: json read fail\n";
    http_response_code(500);
    exit;
}
$data = json_decode($json, true);
if (!is_array($data)) {
    if ($diag) echo "ERR: json decode fail\n";
    http_response_code(500);
    exit;
}

// 候補IDを準備（拡張子あり/なし、大文字小文字差異にも寛容）
$candidates = array_unique([
    (string)$id_norm,
    (string)$id,
    // ついでに全部小文字・大文字も比較（環境差対策）
    strtolower((string)$id_norm),
    strtolower((string)$id),
    strtoupper((string)$id_norm),
    strtoupper((string)$id),
]);

// 該当エントリ検索（wpidex 一致）
$target = null;
foreach ($data as $e) {
    if (!isset($e['wpidex'])) continue;
    $key = (string)$e['wpidex'];

    // wpidex が "KJCtDDxe.txt" のように拡張子付きかもしれないので両形態で比較
    $key_norm = preg_replace('/\.(' . $extlist . ')$/i', '', $key);

    foreach ($candidates as $cand) {
        // cand も同様に拡張子除去した形にして突き合わせ
        $cand_norm = preg_replace('/\.(' . $extlist . ')$/i', '', (string)$cand);
        if ($cand_norm !== '' && strcasecmp($key_norm, $cand_norm) === 0) {
            $target = $e;
            break 2;
        }
        // 念のため完全一致（拡張子ごと）もチェック
        if (strcasecmp($key, (string)$cand) === 0) {
            $target = $e;
            break 2;
        }
    }
}
if ($target === null) {
    if ($diag) {
        echo "ERR: id not found\n";
        echo "id(raw):   {$id}\n";
        echo "id(norm):  {$id_norm}\n";
        echo "cands:     " . implode(', ', $candidates) . "\n";
    }
    http_response_code(404);
    exit;
}

// サーバー選択
$column_M  = isset($target['column_M']) ? (int)$target['column_M'] : 0;
$select_no = isset($target['select_no']) ? (int)$target['select_no'] : 0;

// URL ロジック
$url = '';
if ($column_M === 1) {
    $url = $target['dropboxlink_url'] ?? '';
} elseif ($column_M === 2) {
    $url = str_replace("https://xxxxxxxx.com", "https://xxxxxxxx.synology.me", $target['wp_encoded_url'] ?? '');
} elseif ($column_M === 3) {
    $url = $target['wp_encoded_url'] ?? '';
} elseif ($column_M === 4) {
    $url = generatePcloudUrl($target['wp_pathlink_url'] ?? '');
} else {
    if     ($select_no === 1) $url = $target['dropboxlink_url'] ?? '';
    elseif ($select_no === 2) $url = str_replace("https://xxxxxxxx.com", "https://xxxxxxxx.synology.me", $target['wp_encoded_url'] ?? '');
    elseif ($select_no === 3) $url = $target['wp_encoded_url'] ?? '';
    elseif ($select_no === 4) $url = generatePcloudUrl($target['wp_pathlink_url'] ?? '');
}

if ($url === '' || $url === null) {
    if ($diag) echo "ERR: url empty\n";
    http_response_code(500);
    exit;
}

// 拡張子判定
$path_only = (string)parse_url($url, PHP_URL_PATH);
$ext = strtolower(pathinfo($path_only, PATHINFO_EXTENSION));

// v 付与
$base_ver    = (int)@filemtime(JSON_FILE);
$server_code = ($column_M > 0) ? $column_M : $select_no;
$path_crc    = sprintf('%u', crc32($path_only));
$path_tail3  = substr($path_crc, -3);
$ver         = (string)$base_ver . (string)$server_code . (string)$path_tail3;

$url_with_v = addOrReplaceQueryVar($url, 'v', $ver);

// 診断モードなら出力して終了
if ($diag) {
    echo "id(raw):      {$id}\n";
    echo "id(norm):     {$id_norm}\n";
    echo "wpidex:       {$target['wpidex']}\n";
    echo "column_M:     {$column_M}\n";
    echo "select_no:    {$select_no}\n";
    echo "url(base):    {$url}\n";
    echo "ext:          {$ext}\n";
    echo "json_mtime:   {$base_ver}\n";
    echo "server_code:  {$server_code}\n";
    echo "path_tail3:   {$path_tail3}\n";
    echo "url_with_v:   {$url_with_v}\n";
    echo "OK\n";
    exit;
}

// リダイレクト（302）※ここで Content-Type は送らない
header("Location: ".$url_with_v, true, 302);
exit;

// ------------------------- helpers -------------------------
function generatePcloudUrl($original_url) {
    $prefix      = "https://xxxxxxxx.com/wp-content/";
    $pcloud_base = "https://filedn.eu/<あなたのpCloudトークン>/";
    if (strpos($original_url, $prefix) === 0) {
        $relative_path = substr($original_url, strlen($prefix));
        $parts         = explode('/', $relative_path);
        $encoded_parts = array_map('rawurlencode', $parts);
        $encoded_path  = implode('/', $encoded_parts);
        return $pcloud_base . $encoded_path;
    }
    return '';
}
function addOrReplaceQueryVar($url, $key, $value) {
    $p = parse_url($url);
    $scheme   = $p['scheme'] ?? '';
    $host     = $p['host'] ?? '';
    $port     = isset($p['port']) ? ':' . $p['port'] : '';
    $path     = $p['path'] ?? '';
    $fragment = isset($p['fragment']) ? '#'.$p['fragment'] : '';
    $query    = [];
    if (!empty($p['query'])) parse_str($p['query'], $query);
    $query[$key] = $value;
    $qs = http_build_query($query);

    $auth = '';
    if (isset($p['user'])) {
        $auth = $p['user'];
        if (isset($p['pass'])) $auth .= ':' . $p['pass'];
        $auth .= '@';
    }
    return ($scheme ? $scheme.'://' : '')
         . $auth . $host . $port . $path
         . ($qs ? '?'.$qs : '')
         . $fragment;
}
// ============================================================================

?>