下载准备中，请稍候...
'; exit; } // -------------------------------------------------- // B2：AJAX 轮询 // -------------------------------------------------- if ($step === 'poll') { header('Content-Type: application/json'); if (!$cached) { echo json_encode(['status' => 'processing']); exit; } if ($cached['status'] === 'ready' && !empty($cached['url'])) { echo json_encode([ 'status' => 'ready', 'classid' => $classid, 'id' => $id, 'pathid' => $pathid ]); } elseif ($cached['status'] === 'external' && !empty($cached['url'])) { echo json_encode([ 'status' => 'external', 'url' => $cached['url'] ]); } elseif ($cached['status'] === 'error') { echo json_encode([ 'status' => 'error', 'msg' => $cached['msg'] ?? '获取失败' ]); } else { echo json_encode(['status' => 'processing']); } exit; } // ================================================== // B3：同步请求帝国，透传返回内容 // ================================================== // 3.1 优先读取有效缓存（5分钟） if ($cached && (time() - $cached['time']) < 300) { // 学兔兔资源已就绪 → 进入代理下载 if ($cached['status'] === 'ready' && !empty($cached['url'])) { $url = $cached['url']; goto do_download; } // 非学兔兔外链 → 直接跳转 if ($cached['status'] === 'external' && !empty($cached['url'])) { header("Location: " . $cached['url']); exit; } // 错误 if ($cached['status'] === 'error') { show_error_page('下载失败', $cached['msg'] ?? '文件不存在或已下架'); exit; } } // 3.2 无有效缓存：同步请求帝国下载系统 $empire_url = "$protocol://$host/e/DownSys/GetDown?classid=$classid&id=$id&pathid=$pathid"; $ch = curl_init($empire_url); curl_setopt_array($ch, [ CURLOPT_FOLLOWLOCATION => true, // 跟随帝国所有跳转 CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => true, // 获取响应头 CURLOPT_NOBODY => false, CURLOPT_SSL_VERIFYPEER => false, CURLOPT_SSL_VERIFYHOST => false, CURLOPT_CONNECTTIMEOUT => 10, CURLOPT_TIMEOUT => 30, CURLOPT_COOKIE => $_SERVER['HTTP_COOKIE'] ?? '', CURLOPT_USERAGENT => $_SERVER['HTTP_USER_AGENT'] ?? 'Mozilla/5.0', CURLOPT_REFERER => "$protocol://$host/down/$classid-$id.html", ]); $response = curl_exec($ch); $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE); $header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE); $final_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL); // 最终到达的URL curl_close($ch); // 分离响应头和响应体 $header = substr($response, 0, $header_size); $body = substr($response, $header_size); // ========== 【极简透传】分析HTTP状态码和最终URL ========== // 未登录 / 权限不足 → 帝国会302到登录页或提示页 // 我们透传帝国的最终返回：如果是HTML提示页就echo，如果是跳转就header if ($http_code == 301 || $http_code == 302) { // 帝国返回跳转头 → 直接透传跳转 if (preg_match('/Location:\s*(.+?)\r?\n/i', $header, $m)) { header("Location: " . trim($m[1])); exit; } } // 如果最终URL是帝国内部页面（非下载地址），说明是提示页 // 透传HTML内容 if (stripos($final_url, '/e/') !== false || stripos($final_url, '/down/') !== false) { // 透传帝国的HTML提示页（未登录提示、权限不足提示等） // 修正相对路径 $body = str_replace('href="/', 'href="' . $protocol . '://' . $host . '/', $body); $body = str_replace('src="/', 'src="' . $protocol . '://' . $host . '/', $body); echo $body; exit; } // ========== 拿到真实下载地址 ========== // 此时 $final_url 就是帝国最终跳转到的下载地址 $real_url = $final_url; // ========== 【关键】分辨学兔兔 vs 非学兔兔 ========== $decoded = urldecode($real_url); // 非学兔兔域名（百度网盘等外链）→ 直接跳转，不做代理 if (!preg_match('#^https?://[^/]*\.bzfxw\.com/#i', $decoded)) { file_put_contents($cache_file, json_encode([ 'status' => 'external', 'url' => $real_url, 'time' => time() ])); header("Location: " . $real_url); exit; } // ========================================== // 学兔兔资源：输出准备页面，后台验真 // ========================================== file_put_contents($cache_file, json_encode([ 'status' => 'processing', 'time' => time() ])); output_prepare_html($task_id, $classid, $id, $pathid); if (function_exists('fastcgi_finish_request')) { fastcgi_finish_request(); } // 后台验证文件存在性 $verify = verify_file_exists($real_url); if ($verify['status'] === 'ready') { file_put_contents($cache_file, json_encode([ 'status' => 'ready', 'url' => $real_url, 'time' => time() ])); } else { file_put_contents($cache_file, json_encode([ 'status' => 'error', 'msg' => $verify['msg'] ?? '文件不存在或已下架', 'time' => time() ])); } exit; } die('缺少下载参数'); // ==================== 下载执行逻辑 ==================== do_download: if (empty($url)) die('缺少下载地址'); $decoded = urldecode($url); // ========== 【关键】分辨学兔兔 vs 非学兔兔 ========== // 非学兔兔域名：直接 302 跳转（百度网盘等外链） if (!preg_match('#^https?://[^/]*\.bzfxw\.com/#i', $decoded)) { header("Location: $url"); exit; } // 学兔兔代理下载 $filename = preg_replace('#[/\\\\:*?"<>|]#', '_', basename($decoded)) ?: 'download_' . time(); $parsed = parse_url($url); if ($parsed === false) die('URL解析失败'); $scheme = $parsed['scheme'] ?? 'http'; $host = $parsed['host'] ?? ''; $path = $parsed['path'] ?? ''; // 对路径中的中文/特殊字符进行编码 $path_segments = explode('/', $path); $encoded_segments = []; foreach ($path_segments as $segment) { if ($segment === '') { $encoded_segments[] = $segment; continue; } $encoded_segments[] = rawurlencode(urldecode($segment)); } $encoded_path = implode('/', $encoded_segments); $final_url = "$scheme://$host$encoded_path"; if (!empty($parsed['query'])) $final_url .= '?' . $parsed['query']; // 下载前验证（HEAD 请求） $ch_check = curl_init($final_url); curl_setopt_array($ch_check, [ CURLOPT_NOBODY => true, CURLOPT_RETURNTRANSFER => true, CURLOPT_FOLLOWLOCATION => true, CURLOPT_SSL_VERIFYPEER => false, CURLOPT_SSL_VERIFYHOST => false, CURLOPT_TIMEOUT => 10, CURLOPT_HTTPHEADER => [ 'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36', 'Referer: https://www.bzfxw.com/', ], ]); curl_exec($ch_check); $check_code = curl_getinfo($ch_check, CURLINFO_HTTP_CODE); $check_type = curl_getinfo($ch_check, CURLINFO_CONTENT_TYPE); $check_size = curl_getinfo($ch_check, CURLINFO_CONTENT_LENGTH_DOWNLOAD); curl_close($ch_check); if ($check_code != 200 || ($check_type && stripos($check_type, 'text/html') !== false) || ($check_size !== -1 && $check_size < 1)) { show_error_page('下载失败', '文件不存在或已下架'); exit; } header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename="' . $filename . '"'); header('X-Accel-Buffering: no'); if ($check_size > 0) { header('Content-Length: ' . (int)$check_size); } flush(); $ch = curl_init($final_url); curl_setopt_array($ch, [ CURLOPT_FOLLOWLOCATION => true, CURLOPT_SSL_VERIFYPEER => false, CURLOPT_SSL_VERIFYHOST => false, CURLOPT_TIMEOUT => 0, CURLOPT_CONNECTTIMEOUT => 30, CURLOPT_HTTPHEADER => [ 'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36', 'Referer: https://www.bzfxw.com/', ], CURLOPT_WRITEFUNCTION => function($c, $data) { echo $data; if (ob_get_level()) ob_flush(); flush(); return strlen($data); }, ]); curl_exec($ch); $code = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch); if ($code != 200) { http_response_code(502); die("下载失败，HTTP $code"); } // ==================== 辅助函数 ==================== function output_prepare_html($task_id, $classid, $id, $pathid) { echo '正在获取文件地址，请稍候
下载已开始，请查看浏览器下载列表
此窗口将在 3 秒后自动关闭
' . $msg . '