OneBot: Leantime 改造版源码(BOM/Univer 表格/AI 接管/品牌替换等)
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109
dev/DWGViewer/api/upload.php
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109
dev/DWGViewer/api/upload.php
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<?php
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/**
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* DWG/DXF 查看器 - 上传接口
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* 接收原始字节流 + X-Filename 头,gzip 后异或加密存成 uploads/xxx.enc。
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* 落盘就是密文,即使目录被翻到也拿不到可用的图纸。
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* SECRET 必须与 token.php、model.php 一致。
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*/
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header('Content-Type: application/json; charset=utf-8');
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$SECRET = 'be323d1b90bd2fda624083d4d1d716b7';
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$MAX_SIZE = 200 * 1024 * 1024;
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// 私有目录:Web 目录外的绝对路径,图纸只存这里,web 目录里根本没有图纸文件可下载。
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// 群晖 File Station 在 web 目录外建 /volume1/dwgviewer_private 并给 http 用户组读写权限;
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// 路径不同就改成你的实际路径。
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$PRIVATE_DIR = '/volume1/dwgviewer_private';
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function json_out($code, $obj) {
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http_response_code($code);
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echo json_encode($obj, JSON_UNESCAPED_UNICODE);
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exit;
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}
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if ($_SERVER['REQUEST_METHOD'] !== 'POST') json_out(405, ['error' => 'method not allowed']);
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// 只允许本站页面发起上传(与 token.php 同一策略:Sec-Fetch-Site 优先、Referer 兜底,
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// 父站点的 Referrer-Policy 剥不掉 Sec-Fetch-Site,跨站 iframe 嵌入也能上传)
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$fetchSite = $_SERVER['HTTP_SEC_FETCH_SITE'] ?? '';
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$referer = $_SERVER['HTTP_REFERER'] ?? '';
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$host = $_SERVER['HTTP_HOST'] ?? '';
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if ($fetchSite !== '') {
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if ($fetchSite !== 'same-origin' && $fetchSite !== 'same-site') json_out(403, ['error' => 'forbidden']);
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} elseif (!$host || strpos($referer, $host) === false) {
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json_out(403, ['error' => 'forbidden']);
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}
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$len = (int)($_SERVER['CONTENT_LENGTH'] ?? 0);
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if ($len <= 0) json_out(400, ['error' => 'empty body']);
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if ($len > $MAX_SIZE) json_out(413, ['error' => 'file too large (max 200MB)']);
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$raw = urldecode($_SERVER['HTTP_X_FILENAME'] ?? 'drawing.dwg');
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$base = basename($raw);
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$safe = preg_replace('/[^\w.\-\x{4e00}-\x{9fff}]/u', '_', $base);
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if (!$safe || !preg_match('/\.(dwg|dxf)$/i', $safe)) json_out(400, ['error' => '只支持 .dwg / .dxf']);
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if (strlen($safe) > 200) $safe = substr($safe, 0, 200);
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// 落盘名是纯随机的,不带原文件名也不带真实后缀:
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// 嵌入链接里就看不出这是哪张图、属于哪个项目,也没法按名字猜其它图纸。
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// 原文件名放进加密体里,读取时由 model.php 通过 X-Filename 头带回来显示。
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$name = bin2hex(random_bytes(12)) . '.enc';
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$data = file_get_contents('php://input');
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if ($data === false || strlen($data) !== $len) json_out(400, ['error' => 'incomplete upload']);
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// 存储层压缩:DWG 本身已压过,DXF 文本能压到 1/8
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$rawSize = strlen($data);
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$data = gzencode($data, 6);
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if ($data === false) json_out(500, ['error' => 'gzip failed']);
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// 加密体 = 2 字节名字长度 + 原文件名 + gzip 数据
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$data = pack('n', strlen($safe)) . $safe . $data;
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$dir = $PRIVATE_DIR !== '' ? $PRIVATE_DIR : (__DIR__ . '/../uploads');
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if (!is_dir($dir)) @mkdir($dir, 0755, true);
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if (!is_dir($dir)) json_out(500, ['error' => 'upload dir not writable']);
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$nonce = random_bytes(16);
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$key = hash('sha256', $SECRET . $nonce, true);
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$enc = '';
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for ($i = 0; $i < strlen($data); $i++) {
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$enc .= $data[$i] ^ $key[$i % strlen($key)];
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}
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if (file_put_contents($dir . '/' . $name, $nonce . $enc) === false) {
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json_out(500, ['error' => 'write failed']);
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}
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// 私有目录模式下返回裸文件名:嵌入链接就是 ?file=xxx.enc,读取端按 basename 在私有目录找
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$entryPath = ($PRIVATE_DIR !== '' ? '' : 'uploads/') . $name;
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// 记入首页数模库(入口目录的 library.json,2D/3D 共享);库写失败不影响上传本身
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try {
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add_to_library($entryPath, $safe, '2d');
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} catch (Throwable $e) { /* 忽略 */ }
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json_out(200, ['path' => $entryPath, 'name' => $safe, 'size' => $rawSize]);
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/**
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* 把刚上传的文件追加进首页数模库(../../library.json):
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* 同路径已有记录就刷新名称和时间,否则插到最前。
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*/
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function add_to_library($path, $name, $type) {
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$libFile = dirname(__DIR__, 2) . '/library.json';
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$records = [];
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if (is_file($libFile)) {
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$old = json_decode((string)file_get_contents($libFile), true);
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if (is_array($old) && isset($old['records']) && is_array($old['records'])) $records = $old['records'];
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}
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$found = false;
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foreach ($records as $i => $rec) {
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if (isset($rec['path']) && $rec['path'] === $path) {
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$records[$i]['name'] = $name;
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$records[$i]['time'] = time();
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$found = true;
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break;
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}
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}
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if (!$found) {
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array_unshift($records, ['path' => $path, 'name' => $name, 'type' => $type, 'note' => '', 'time' => time()]);
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}
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@file_put_contents($libFile, json_encode(['records' => $records], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES), LOCK_EX);
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}
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