vpn_plugin 0.1.0

Flutter VPN engine embedding the sing-box core (iOS NetworkExtension / Android VpnService), with share-link parsing and config generation. GPL-3.0.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:vpn_plugin/vpn_plugin.dart';

void main() => runApp(const ExampleApp());

class ExampleApp extends StatefulWidget {
  const ExampleApp({super.key});

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  final _vpn = SingboxVpn();
  final _link = TextEditingController();
  VpnState _state = VpnState.disconnected;
  String? _message;
  String _version = '';

  @override
  void initState() {
    super.initState();
    _vpn.statusStream().listen((s) => setState(() {
          _state = s.state;
          _message = s.message;
        }));
    _vpn.coreVersion().then((v) => setState(() => _version = v));
  }

  @override
  void dispose() {
    _link.dispose();
    super.dispose();
  }

  Future<void> _toggle() async {
    if (_state.isActive) {
      await _vpn.stop();
      return;
    }
    final outbound = parseShareLink(_link.text.trim());
    if (outbound == null) {
      _snack('无法解析该链接');
      return;
    }
    try {
      await _vpn.startOutbound(outbound, options: const SingboxConfigOptions(routeMode: 'rule'));
    } catch (e) {
      _snack('连接失败：$e');
    }
  }

  void _snack(String m) =>
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(m)));

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('vpn_plugin ($_version)')),
        body: Padding(
          padding: const EdgeInsets.all(20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              TextField(
                controller: _link,
                minLines: 2,
                maxLines: 4,
                decoration: const InputDecoration(
                  labelText: '分享链接 (vless:// / vmess:// / ...)',
                  border: OutlineInputBorder(),
                ),
              ),
              const SizedBox(height: 16),
              Text('状态: ${_state.name}${_message != null ? ' — $_message' : ''}'),
              const SizedBox(height: 16),
              FilledButton(
                onPressed: _state.isBusy ? null : _toggle,
                child: Text(_state.isActive ? '断开' : '连接'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}