mirror of
https://github.com/wanghongenpin/proxypin.git
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432 lines
13 KiB
Dart
432 lines
13 KiB
Dart
/*
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* Copyright 2023 Hongen Wang All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import 'dart:convert';
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import 'dart:io';
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import 'package:desktop_multi_window/desktop_multi_window.dart';
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import 'package:flutter_js/flutter_js.dart';
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import 'package:proxypin/network/http/http.dart';
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import 'package:proxypin/network/util/cache.dart';
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import 'package:proxypin/network/util/logger.dart';
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import 'package:proxypin/network/util/random.dart';
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import 'package:proxypin/ui/component/device.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:http/http.dart' as http;
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import '../js/script_engine.dart';
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/// @author wanghongen
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/// 2023/10/06
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/// js脚本
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class ScriptManager {
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static String template = """
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// e.g. Add/Update/Remove：Queries、Headers、Body
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async function onRequest(context, request) {
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console.log(request.url);
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//Update or add Header
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//request.headers["X-New-Headers"] = "My-Value";
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// Update Body use fetch API request，具体文档可网上搜索fetch API
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//request.body = await fetch('https://www.baidu.com/').then(response => response.text());
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return request;
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}
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//You can modify the Response Data here before it goes to the client
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async function onResponse(context, request, response) {
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// response.statusCode = 200;
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//var body = JSON.parse(response.body);
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//body['key'] = "value";
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//response.body = JSON.stringify(body);
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return response;
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}
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""";
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static String separator = Platform.pathSeparator;
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static ScriptManager? _instance;
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bool enabled = true;
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List<ScriptItem> list = [];
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final ExpiringCache<ScriptItem, String> _scriptMap = ExpiringCache<ScriptItem, String>(Duration(minutes: 15));
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static late JavascriptRuntime flutterJs;
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static String? deviceId;
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static final List<LogHandler> _logHandlers = [];
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ScriptManager._();
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///单例
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static Future<ScriptManager> get instance async {
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if (_instance == null) {
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_instance = ScriptManager._();
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await _instance?.reloadScript();
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flutterJs = await JavaScriptEngine.getJavaScript(consoleLog: consoleLog);
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deviceId = await DeviceUtils.deviceId();
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logger.d('init script manager $deviceId');
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}
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return _instance!;
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}
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static void registerConsoleLog(int fromWindowId) {
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LogHandler logHandler = LogHandler(
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channelId: fromWindowId,
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handle: (logInfo) {
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DesktopMultiWindow.invokeMethod(fromWindowId, "consoleLog", logInfo.toJson()).onError((e, t) {
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logger.e("consoleLog error: $e");
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removeLogHandler(fromWindowId);
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});
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});
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registerLogHandler(logHandler);
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}
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static void registerLogHandler(LogHandler logHandler) {
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if (_logHandlers.any((it) => it.channelId == logHandler.channelId)) {
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_logHandlers.removeWhere((it) => it.channelId == logHandler.channelId);
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}
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_logHandlers.add(logHandler);
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}
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static void removeLogHandler(int channelId) {
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_logHandlers.removeWhere((element) => channelId == element.channelId);
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}
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static dynamic consoleLog(dynamic args) async {
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if (_logHandlers.isEmpty) {
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return;
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}
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var level = args.removeAt(0);
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String output = args.join(' ');
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if (level == 'info') level = 'warn';
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LogInfo logInfo = LogInfo(level, output);
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for (int i = 0; i < _logHandlers.length; i++) {
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_logHandlers[i].handle.call(logInfo);
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}
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}
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///重新加载脚本
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Future<void> reloadScript() async {
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List<ScriptItem> scripts = [];
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var file = await _path;
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logger.d("reloadScript ${file.path}");
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if (await file.exists()) {
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var content = await file.readAsString();
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if (content.isEmpty) {
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return;
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}
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var config = jsonDecode(content);
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enabled = config['enabled'] == true;
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for (var entry in config['list']) {
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scripts.add(ScriptItem.fromJson(entry));
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}
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}
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list = scripts;
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_scriptMap.clear();
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}
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static String? _homePath;
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static Future<String> homePath() async {
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if (_homePath != null) {
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return _homePath!;
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}
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if (Platform.isMacOS) {
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_homePath = await DesktopMultiWindow.invokeMethod(0, "getApplicationSupportDirectory");
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} else {
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_homePath = await getApplicationSupportDirectory().then((it) => it.path);
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}
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return _homePath!;
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}
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static Future<File> get _path async {
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final path = await homePath();
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var file = File('$path${separator}script.json');
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if (!await file.exists()) {
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await file.create();
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}
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return file;
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}
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Future<String?> getScript(ScriptItem item) async {
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// Local script (existing behavior)
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if (_scriptMap.containsKey(item)) {
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return _scriptMap[item]!;
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}
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// Remote script
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if (item.remoteUrl != null && item.remoteUrl!.trim().isNotEmpty) {
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var script = await _fetchRemoteScript(item);
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if (script != null) {
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_scriptMap[item] = script;
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}
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return script;
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}
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final home = await homePath();
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var script = await File(home + item.scriptPath!).readAsString();
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_scriptMap[item] = script;
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return script;
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}
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Future<String?> _fetchRemoteScript(ScriptItem item) async {
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final url = item.remoteUrl!.trim();
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if (!_isHttpUrl(url)) {
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return null;
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}
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final resp = await http.get(Uri.parse(url));
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final bytes = resp.bodyBytes;
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final content = utf8.decode(bytes);
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_scriptMap[item] = content;
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return content;
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}
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bool _isHttpUrl(String url) {
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final uri = Uri.tryParse(url);
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if (uri == null) return false;
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return uri.scheme == 'http' || uri.scheme == 'https';
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}
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///添加脚本
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Future<void> addScript(ScriptItem item, String? script) async {
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// Remote script: script is treated as initial cache (optional)
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if (item.remoteUrl != null && item.remoteUrl!.trim().isNotEmpty) {
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list.add(item);
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return;
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}
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script ??= template;
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final path = await homePath();
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String scriptPath = "${separator}scripts$separator${RandomUtil.randomString(16)}.js";
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var file = File(path + scriptPath);
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await file.create(recursive: true);
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file.writeAsString(script);
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item.scriptPath = scriptPath;
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list.add(item);
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_scriptMap[item] = script;
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}
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///更新脚本
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Future<void> updateScript(ScriptItem item, String script) async {
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// Remote scripts: update cache file (treat as local override of cache)
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if (item.remoteUrl != null && item.remoteUrl!.trim().isNotEmpty) {
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_scriptMap[item] = script;
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return;
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}
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if (_scriptMap[item] == script) {
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return;
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}
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final home = await homePath();
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File(home + item.scriptPath!).writeAsString(script);
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_scriptMap[item] = script;
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}
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///删除脚本
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Future<void> removeScript(int index) async {
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var item = list.removeAt(index);
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_scriptMap.remove(item);
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if (item.scriptPath != null) {
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final home = await homePath();
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File(home + item.scriptPath!).delete();
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}
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}
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Future<void> clean() async {
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_scriptMap.clear();
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while (list.isNotEmpty) {
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var item = list.removeLast();
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if (item.scriptPath != null) {
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final home = await homePath();
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File(home + item.scriptPath!).delete();
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}
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}
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await flushConfig();
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}
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///刷新配置
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Future<void> flushConfig() async {
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await _path.then((value) => value.writeAsString(jsonEncode({'enabled': enabled, 'list': list})));
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}
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Map<dynamic, dynamic> scriptSession = {};
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///脚本上下文
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Map<String, dynamic> scriptContext(ScriptItem item) {
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return {'scriptName': item.name, 'os': Platform.operatingSystem, 'session': scriptSession, "deviceId": deviceId};
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}
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///运行脚本
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Future<HttpRequest?> runScript(HttpRequest request) async {
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if (!enabled) {
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return request;
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}
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var url = request.domainPath;
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for (var item in list) {
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if (item.enabled && item.match(url)) {
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var context = jsonEncode(scriptContext(item));
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var jsRequest = jsonEncode(await JavaScriptEngine.convertJsRequest(request));
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String? script = await getScript(item);
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if (script == null) {
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continue;
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}
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var jsResult = await flutterJs.evaluateAsync(
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"""var request = $jsRequest, context = $context; request['scriptContext'] = context; $script\n onRequest(context, request)""");
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var result = await JavaScriptEngine.jsResultResolve(flutterJs, jsResult);
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if (result == null) {
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return null;
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}
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request.attributes['scriptContext'] = result['scriptContext'];
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scriptSession = result['scriptContext']['session'] ?? {};
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request = JavaScriptEngine.convertHttpRequest(request, result);
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}
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}
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return request;
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}
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///运行脚本
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Future<HttpResponse?> runResponseScript(HttpResponse response) async {
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if (!enabled || response.request == null) {
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return response;
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}
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var request = response.request!;
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var url = request.domainPath;
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for (var item in list) {
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if (item.enabled && item.match(url)) {
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var context = jsonEncode(request.attributes['scriptContext'] ?? scriptContext(item));
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var jsRequest = jsonEncode(await JavaScriptEngine.convertJsRequest(request));
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var jsResponse = jsonEncode(await JavaScriptEngine.convertJsResponse(response));
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String? script = await getScript(item);
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if (script == null) {
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continue;
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}
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var jsResult = await flutterJs.evaluateAsync(
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"""var response = $jsResponse, context = $context; response['scriptContext'] = context; $script
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\n onResponse(context, $jsRequest, response);""");
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// print("response: ${jsResult.isPromise} ${jsResult.isError} ${jsResult.rawResult}");
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var result = await JavaScriptEngine.jsResultResolve(flutterJs, jsResult);
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if (result == null) {
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return null;
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}
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scriptSession = result['scriptContext']['session'] ?? {};
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response = JavaScriptEngine.convertHttpResponse(response, result);
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}
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}
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return response;
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}
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}
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class LogHandler {
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final int channelId;
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final Function(LogInfo logInfo) handle;
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LogHandler({required this.channelId, required this.handle});
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}
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class LogInfo {
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final DateTime time;
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final String level;
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final String output;
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LogInfo(this.level, this.output, {DateTime? time}) : time = time ?? DateTime.now();
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factory LogInfo.fromJson(Map<String, dynamic> json) {
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return LogInfo(json['level'], json['output'], time: DateTime.fromMillisecondsSinceEpoch(json['time']));
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}
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Map<String, dynamic> toJson() {
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return {'time': time.millisecondsSinceEpoch, 'level': level, 'output': output};
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}
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@override
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String toString() {
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return '{time: $time, level: $level, output: $output}';
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}
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}
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class ScriptItem {
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bool enabled = true;
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String? name;
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List<String> urls;
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String? scriptPath;
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List<RegExp?>? urlRegs;
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String? remoteUrl;
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ScriptItem(this.enabled, this.name, dynamic urls, {this.scriptPath, this.remoteUrl})
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: urls = urls is String
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? (urls.contains(',') ? urls.split(',').map((e) => e.trim()).toList() : [urls])
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: (urls is List<String> ? urls : <String>[]);
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// 匹配url，任意一个规则匹配即可
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bool match(String url) {
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urlRegs ??= urls.map((u) => RegExp(u.replaceAll("*", ".*"))).toList();
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for (final reg in urlRegs!) {
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if (reg!.hasMatch(url)) return true;
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}
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return false;
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}
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factory ScriptItem.fromJson(Map<dynamic, dynamic> json) {
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final urlField = json['url'];
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List<String> urls;
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if (urlField is List) {
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urls = urlField.cast<String>();
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} else if (urlField is String) {
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urls = urlField.contains(',') ? urlField.split(',').map((e) => e.trim()).toList() : [urlField];
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} else {
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urls = <String>[];
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}
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return ScriptItem(
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json['enabled'],
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json['name'],
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urls,
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scriptPath: json['scriptPath'],
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remoteUrl: json['remoteUrl'],
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);
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}
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Map<String, dynamic> toJson() {
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return {
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'enabled': enabled,
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'name': name,
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'url': urls.length == 1 ? urls[0] : urls,
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'scriptPath': scriptPath,
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if (remoteUrl != null) 'remoteUrl': remoteUrl,
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};
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}
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@override
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String toString() {
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return 'ScriptItem{enabled: $enabled, name: $name, url: $urls, scriptPath: $scriptPath, remoteUrl: $remoteUrl}';
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}
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}
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