324 lines
9.8 KiB
Dart
324 lines
9.8 KiB
Dart
// ============================================================
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// 文件名: webdav_service.dart
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// 功能: WebDAV 协议通信服务，支持文件夹浏览和音乐文件读取
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// ============================================================
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import 'dart:convert';
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import 'package:dio/dio.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:xml/xml.dart';
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// -----------------------------------------------------------------
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// WebDAV 服务单例
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// -----------------------------------------------------------------
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class WebDAVService {
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static const String _keyBaseUrl = 'webdav_base_url';
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static const String _keyUsername = 'webdav_username';
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static const String _keyPassword = 'webdav_password';
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static WebDAVService? _instance;
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static WebDAVService get instance => _instance ??= WebDAVService._();
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WebDAVService._();
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Dio? _dio;
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String? _baseUrl;
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String? _username;
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// -------------------------------------------------------------
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// 公开 Getter
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// -------------------------------------------------------------
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bool get isConnected => _dio != null;
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String? get baseUrl => _baseUrl;
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String? get username => _username;
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// -------------------------------------------------------------
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// 凭据管理
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// -------------------------------------------------------------
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Future<void> saveCredentials(
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String baseUrl, String username, String password) async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.setString(_keyBaseUrl, baseUrl);
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await prefs.setString(_keyUsername, username);
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await prefs.setString(_keyPassword, password);
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_baseUrl = baseUrl;
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_username = username;
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_dio = Dio(BaseOptions(
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baseUrl: baseUrl,
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headers: {
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'Authorization':
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'Basic ${base64Encode(utf8.encode('$username:$password'))}',
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},
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));
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}
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Future<bool> loadCredentials() async {
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final prefs = await SharedPreferences.getInstance();
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final baseUrl = prefs.getString(_keyBaseUrl);
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final username = prefs.getString(_keyUsername);
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final password = prefs.getString(_keyPassword);
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if (baseUrl != null && username != null && password != null) {
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_baseUrl = baseUrl;
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_username = username;
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_dio = Dio(BaseOptions(
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baseUrl: baseUrl,
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headers: {
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'Authorization':
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'Basic ${base64Encode(utf8.encode('$username:$password'))}',
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},
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));
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return true;
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}
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return false;
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}
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Future<void> clearCredentials() async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.remove(_keyBaseUrl);
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await prefs.remove(_keyUsername);
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await prefs.remove(_keyPassword);
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_dio = null;
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_baseUrl = null;
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_username = null;
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}
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// -------------------------------------------------------------
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// 核心：列出目录内容（文件夹 + 音乐文件）
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// 这是浏览模式的核心方法，支持进入子目录
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// -------------------------------------------------------------
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Future<List<WebDAVItem>> listDirectory({String path = '/'}) async {
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if (_dio == null) throw Exception('WebDAV 未连接');
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final requestPath = path.startsWith('/') ? path : '/$path';
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final body = '''
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<?xml version="1.0" encoding="utf-8"?>
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<propfind xmlns="DAV:">
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<prop>
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<resourcetype/>
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<getcontentlength/>
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<getlastmodified/>
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</prop>
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</propfind>
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''';
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final response = await _dio!.request(
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requestPath,
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options: Options(
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method: 'PROPFIND',
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headers: {
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'Depth': '1',
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'Content-Type': 'application/xml; charset=utf-8',
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},
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),
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data: body,
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);
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if (response.statusCode != 207) {
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throw Exception('WebDAV 响应异常: ${response.statusCode}');
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}
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final xml = XmlDocument.parse(response.data as String);
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final items = <WebDAVItem>[];
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final musicExtensions = ['.mp3', '.flac', '.m4a', '.ape', '.wav', '.opus'];
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final responseNodes = xml.findAllElements('D:response');
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for (final responseNode in responseNodes) {
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final hrefNode = responseNode.findElements('D:href').firstOrNull;
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if (hrefNode == null) continue;
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String fullPath = Uri.decodeComponent(hrefNode.text.trim());
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// 去掉 baseUrl 前缀
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String relativePath = fullPath;
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if (_baseUrl != null) {
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try {
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final baseUri = Uri.parse(_baseUrl!);
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final fullUri = Uri.parse(fullPath);
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String fullPathOnly = fullUri.path;
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if (baseUri.path.isNotEmpty &&
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fullPathOnly.startsWith(baseUri.path)) {
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relativePath = fullPathOnly.substring(baseUri.path.length);
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} else {
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relativePath = fullPathOnly;
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}
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} catch (_) {
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relativePath = fullPath;
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}
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}
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// 跳过根目录自身
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if (relativePath.isEmpty ||
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relativePath == '/' ||
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relativePath == requestPath) {
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continue;
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}
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final cleanPath = relativePath.endsWith('/')
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? relativePath.substring(0, relativePath.length - 1)
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: relativePath;
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// ✅ 解码文件名
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String fileName = cleanPath.split('/').last;
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fileName = Uri.decodeComponent(fileName);
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if (fileName.isEmpty) continue;
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// 判断是否为目录
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bool isDirectory = false;
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final resTypeNode =
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responseNode.findElements('D:resourcetype').firstOrNull;
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if (resTypeNode != null) {
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final collection = resTypeNode.findElements('D:collection').firstOrNull;
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if (collection != null) {
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isDirectory = true;
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}
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}
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if (!isDirectory && fullPath.endsWith('/')) {
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isDirectory = true;
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}
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if (isDirectory) {
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items.add(WebDAVItem(
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path: cleanPath,
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name: fileName,
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isDirectory: true,
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size: null,
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modified: null,
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));
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continue;
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}
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// 只保留音乐文件
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if (!musicExtensions.any((ext) => fileName.toLowerCase().endsWith(ext))) {
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continue;
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}
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int? size;
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DateTime? modified;
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final sizeNode =
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responseNode.findElements('D:getcontentlength').firstOrNull;
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if (sizeNode != null && sizeNode.text.isNotEmpty) {
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size = int.tryParse(sizeNode.text);
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}
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final modifiedNode =
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responseNode.findElements('D:getlastmodified').firstOrNull;
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if (modifiedNode != null) {
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try {
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modified = DateTime.parse(modifiedNode.text);
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} catch (_) {}
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}
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items.add(WebDAVItem(
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path: cleanPath,
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name: fileName,
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isDirectory: false,
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size: size,
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modified: modified,
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));
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}
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// 排序
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items.sort((a, b) {
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if (a.isDirectory && !b.isDirectory) return -1;
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if (!a.isDirectory && b.isDirectory) return 1;
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return a.name.toLowerCase().compareTo(b.name.toLowerCase());
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});
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// 只保留一条日志，避免刷屏
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print('WebDAV listDirectory: 找到 ${items.length} 项，路径: $requestPath');
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return items;
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}
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// -------------------------------------------------------------
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// 兼容旧接口：获取所有音乐文件（递归扫描）
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// 用于主页的"我的收藏"列表（后续可改为读取用户收藏）
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// -------------------------------------------------------------
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Future<List<WebDAVFileItem>> getMusicFiles({String path = '/'}) async {
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if (_dio == null) throw Exception('WebDAV 未连接');
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// 递归获取所有文件（先获取当前目录，再递归子目录）
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final allItems = await _listAllRecursive(path);
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final musicExtensions = ['.mp3', '.flac', '.m4a', '.ape', '.wav', '.opus'];
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return allItems
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.where((item) =>
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!item.isDirectory &&
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musicExtensions.any((ext) => item.name.toLowerCase().endsWith(ext)))
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.map((item) => WebDAVFileItem(
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path: item.path,
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name: item.name,
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size: item.size,
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modified: item.modified,
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))
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.toList();
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}
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// 递归获取所有目录和文件（内部使用）
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Future<List<WebDAVItem>> _listAllRecursive(String path) async {
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final items = await listDirectory(path: path);
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final result = <WebDAVItem>[];
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for (final item in items) {
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result.add(item);
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if (item.isDirectory) {
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// 递归获取子目录内容
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try {
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final subItems = await _listAllRecursive(item.path);
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result.addAll(subItems);
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} catch (_) {
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// 忽略无法读取的子目录
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}
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}
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}
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return result;
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}
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// -------------------------------------------------------------
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// 获取文件的完整下载 URL
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// -------------------------------------------------------------
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String getFileUrl(String path) {
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if (_baseUrl == null) throw Exception('WebDAV 未配置');
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final base = _baseUrl!.endsWith('/') ? _baseUrl! : '$_baseUrl/';
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final cleanPath = path.startsWith('/') ? path.substring(1) : path;
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return '$base$cleanPath';
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}
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}
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// -----------------------------------------------------------------
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// 数据模型：WebDAV 目录项（用于浏览模式）
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// -----------------------------------------------------------------
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class WebDAVItem {
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final String path;
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final String name;
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final bool isDirectory;
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final int? size;
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final DateTime? modified;
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WebDAVItem({
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required this.path,
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required this.name,
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required this.isDirectory,
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this.size,
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this.modified,
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});
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}
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// -----------------------------------------------------------------
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// 数据模型：WebDAV 文件项（用于播放列表）
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// -----------------------------------------------------------------
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class WebDAVFileItem {
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final String path;
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final String name;
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final int? size;
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final DateTime? modified;
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WebDAVFileItem({
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required this.path,
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required this.name,
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this.size,
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this.modified,
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});
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}
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