♻️ Splitting up ipc servers in unix and windows
This commit is contained in:
460
lib/pods/activity/activity_rpc.dart
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460
lib/pods/activity/activity_rpc.dart
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import 'dart:async';
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import 'dart:convert';
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import 'dart:developer' as developer;
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import 'dart:io';
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import 'package:flutter/foundation.dart';
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import 'package:hooks_riverpod/hooks_riverpod.dart';
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import 'package:island/pods/network.dart';
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import 'package:shelf/shelf.dart';
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import 'package:shelf/shelf_io.dart' as shelf_io;
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import 'package:shelf_web_socket/shelf_web_socket.dart';
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import 'package:web_socket_channel/web_socket_channel.dart';
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import 'ipc_server.dart';
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import 'ipc_server.windows.dart';
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import 'ipc_server.unix.dart';
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const String kRpcLogPrefix = 'arRPC.websocket';
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const String kRpcIpcLogPrefix = 'arRPC.ipc';
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// IPC Constants
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const String kIpcBasePath = 'discord-ipc';
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// IPC Packet Types
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class IpcTypes {
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static const int handshake = 0;
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static const int frame = 1;
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static const int close = 2;
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static const int ping = 3;
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static const int pong = 4;
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}
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// IPC Close Codes
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class IpcCloseCodes {
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static const int closeNormal = 1000;
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static const int closeUnsupported = 1003;
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static const int closeAbnormal = 1006;
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}
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// IPC Error Codes
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class IpcErrorCodes {
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static const int invalidClientId = 4000;
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static const int invalidOrigin = 4001;
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static const int rateLimited = 4002;
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static const int tokenRevoked = 4003;
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static const int invalidVersion = 4004;
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static const int invalidEncoding = 4005;
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}
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// Reference https://github.com/OpenAsar/arrpc/blob/main/src/transports/ipc.js
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class ActivityRpcServer {
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static const List<int> portRange = [6463, 6472]; // Ports 6463–6472
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Map<String, Function>
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handlers; // {connection: (socket), message: (socket, data), close: (socket)}
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HttpServer? _httpServer;
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IpcServer? _ipcServer;
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final List<WebSocketChannel> _wsSockets = [];
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ActivityRpcServer(this.handlers);
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void updateHandlers(Map<String, Function> newHandlers) {
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handlers = newHandlers;
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}
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// Start the server
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Future<void> start() async {
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int port = portRange[0];
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bool wsSuccess = false;
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// Start WebSocket server
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while (port <= portRange[1]) {
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developer.log('Trying port $port', name: kRpcLogPrefix);
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try {
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_httpServer = await HttpServer.bind(InternetAddress.loopbackIPv4, port);
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developer.log('Listening on $port', name: kRpcLogPrefix);
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shelf_io.serveRequests(_httpServer!, (Request request) async {
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developer.log('New request', name: kRpcLogPrefix);
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if (request.headers['upgrade']?.toLowerCase() == 'websocket') {
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final handler = webSocketHandler((WebSocketChannel channel, _) {
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_wsSockets.add(channel);
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_onWsConnection(channel, request);
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});
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return handler(request);
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}
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developer.log(
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'New request disposed due to not websocket',
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name: kRpcLogPrefix,
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);
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return Response.notFound('Not a WebSocket request');
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});
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wsSuccess = true;
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break;
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} catch (e) {
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if (e is SocketException && e.osError?.errorCode == 98) {
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developer.log('$port in use!', name: kRpcLogPrefix);
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} else {
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developer.log('HTTP error: $e', name: kRpcLogPrefix);
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}
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port++;
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await Future.delayed(Duration(milliseconds: 100)); // Add delay
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}
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}
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if (!wsSuccess) {
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throw Exception(
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'Failed to bind to any port in range ${portRange[0]}–${portRange[1]}',
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);
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}
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// Start IPC server
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final shouldStartIpc = !Platform.isMacOS && !kIsWeb;
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if (shouldStartIpc) {
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try {
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if (Platform.isWindows) {
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_ipcServer = WindowsIpcServer();
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} else {
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_ipcServer = UnixIpcServer();
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}
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// Set up IPC handlers
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_ipcServer!.handlePacket = (socket, packet, _) {
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_handleIpcPacket(socket, packet);
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};
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await _ipcServer!.start();
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} catch (e) {
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developer.log('IPC server error: $e', name: kRpcIpcLogPrefix);
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}
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} else {
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developer.log(
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'IPC server disabled on macOS or web in production mode',
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name: kRpcIpcLogPrefix,
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);
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}
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}
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// Stop the server
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Future<void> stop() async {
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// Stop WebSocket server
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for (var socket in _wsSockets) {
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try {
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await socket.sink.close();
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} catch (e) {
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developer.log('Error closing WebSocket: $e', name: kRpcLogPrefix);
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}
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}
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_wsSockets.clear();
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await _httpServer?.close(force: true);
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// Stop IPC server
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await _ipcServer?.stop();
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developer.log('Servers stopped', name: kRpcLogPrefix);
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}
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// Handle new WebSocket connection
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void _onWsConnection(WebSocketChannel socket, Request request) {
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final uri = request.url;
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final params = uri.queryParameters;
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final ver = int.tryParse(params['v'] ?? '1') ?? 1;
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final encoding = params['encoding'] ?? 'json';
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final clientId = params['client_id'] ?? '';
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final origin = request.headers['origin'] ?? '';
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developer.log(
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'New WS connection! origin: $origin, params: $params',
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name: kRpcLogPrefix,
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);
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if (origin.isNotEmpty &&
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![
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'https://discord.com',
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'https://ptb.discord.com',
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'https://canary.discord.com',
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].contains(origin)) {
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developer.log('Disallowed origin: $origin', name: kRpcLogPrefix);
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socket.sink.close();
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return;
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}
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if (encoding != 'json') {
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developer.log(
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'Unsupported encoding requested: $encoding',
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name: kRpcLogPrefix,
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);
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socket.sink.close();
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return;
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}
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if (ver != 1) {
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developer.log('Unsupported version requested: $ver', name: kRpcLogPrefix);
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socket.sink.close();
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return;
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}
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final socketWithMeta = _WsSocketWrapper(socket, clientId, encoding);
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socket.stream.listen(
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(data) => _onWsMessage(socketWithMeta, data),
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onError: (e) {
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developer.log('WS socket error: $e', name: kRpcLogPrefix);
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},
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onDone: () {
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developer.log('WS socket closed', name: kRpcLogPrefix);
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handlers['close']?.call(socketWithMeta);
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_wsSockets.remove(socket);
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},
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);
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handlers['connection']?.call(socketWithMeta);
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}
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// Handle incoming WebSocket message
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Future<void> _onWsMessage(_WsSocketWrapper socket, dynamic data) async {
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if (data is! String) {
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developer.log(
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'Invalid WebSocket message: not a string',
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name: kRpcLogPrefix,
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);
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return;
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}
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try {
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final jsonData = await compute(jsonDecode, data);
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if (jsonData is! Map<String, dynamic>) {
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developer.log(
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'Invalid WebSocket message: not a JSON object',
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name: kRpcLogPrefix,
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);
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return;
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}
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developer.log('WS message: $jsonData', name: kRpcLogPrefix);
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handlers['message']?.call(socket, jsonData);
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} catch (e) {
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developer.log('WS message parse error: $e', name: kRpcLogPrefix);
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}
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}
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// Handle IPC packet
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void _handleIpcPacket(IpcSocketWrapper socket, IpcPacket packet) {
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switch (packet.type) {
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case IpcTypes.ping:
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developer.log('IPC ping received', name: kRpcIpcLogPrefix);
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socket.sendPong(packet.data);
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break;
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case IpcTypes.pong:
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developer.log('IPC pong received', name: kRpcIpcLogPrefix);
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break;
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case IpcTypes.handshake:
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if (socket.handshook) {
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throw Exception('Already handshook');
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}
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socket.handshook = true;
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_onIpcHandshake(socket, packet.data);
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break;
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case IpcTypes.frame:
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if (!socket.handshook) {
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throw Exception('Need to handshake first');
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}
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developer.log('IPC frame: ${packet.data}', name: kRpcIpcLogPrefix);
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handlers['message']?.call(socket, packet.data);
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break;
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case IpcTypes.close:
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socket.close();
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break;
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default:
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throw Exception('Invalid packet type: ${packet.type}');
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}
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}
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// Handle IPC handshake
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void _onIpcHandshake(IpcSocketWrapper socket, Map<String, dynamic> params) {
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developer.log('IPC handshake: $params', name: kRpcIpcLogPrefix);
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final ver = int.tryParse(params['v']?.toString() ?? '1') ?? 1;
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final clientId = params['client_id']?.toString() ?? '';
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if (ver != 1) {
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developer.log(
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'IPC unsupported version requested: $ver',
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name: kRpcIpcLogPrefix,
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);
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socket.closeWithCode(IpcErrorCodes.invalidVersion);
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return;
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}
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if (clientId.isEmpty) {
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developer.log('IPC client ID required', name: kRpcIpcLogPrefix);
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socket.closeWithCode(IpcErrorCodes.invalidClientId);
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return;
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}
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socket.clientId = clientId;
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handlers['connection']?.call(socket);
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}
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}
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// WebSocket wrapper
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class _WsSocketWrapper {
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final WebSocketChannel channel;
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final String clientId;
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final String encoding;
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_WsSocketWrapper(this.channel, this.clientId, this.encoding);
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void send(Map<String, dynamic> msg) {
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developer.log('WS sending: $msg', name: kRpcLogPrefix);
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channel.sink.add(jsonEncode(msg));
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}
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}
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// State management for server status and activities
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class ServerState {
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final String status;
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final List<String> activities;
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ServerState({required this.status, this.activities = const []});
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ServerState copyWith({String? status, List<String>? activities}) {
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return ServerState(
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status: status ?? this.status,
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activities: activities ?? this.activities,
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);
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}
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}
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class ServerStateNotifier extends StateNotifier<ServerState> {
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final ActivityRpcServer server;
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ServerStateNotifier(this.server)
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: super(ServerState(status: 'Server not started'));
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Future<void> start() async {
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if (!Platform.isAndroid && !Platform.isIOS && !kIsWeb) {
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try {
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await server.start();
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state = state.copyWith(status: 'Server running');
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} catch (e) {
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state = state.copyWith(status: 'Server failed: $e');
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}
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} else {
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state = state.copyWith(status: 'Server disabled on mobile/web');
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}
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}
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void updateStatus(String status) {
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state = state.copyWith(status: status);
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}
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void addActivity(String activity) {
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state = state.copyWith(activities: [...state.activities, activity]);
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}
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}
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// Providers
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final rpcServerStateProvider =
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StateNotifierProvider<ServerStateNotifier, ServerState>((ref) {
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final server = ActivityRpcServer({});
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final notifier = ServerStateNotifier(server);
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server.updateHandlers({
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'connection': (socket) {
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final clientId =
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socket is _WsSocketWrapper
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? socket.clientId
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: (socket as IpcSocketWrapper).clientId;
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notifier.updateStatus('Client connected (ID: $clientId)');
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socket.send({
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'cmd': 'DISPATCH',
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'data': {
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'v': 1,
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'config': {
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'cdn_host': 'fake.cdn',
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'api_endpoint': '//fake.api',
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'environment': 'dev',
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},
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'user': {
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'id': 'fake_user_id',
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'username': 'FakeUser',
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'discriminator': '0001',
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'avatar': null,
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'bot': false,
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},
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},
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'evt': 'READY',
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'nonce': '12345',
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});
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},
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'message': (socket, dynamic data) async {
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if (data['cmd'] == 'SET_ACTIVITY') {
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notifier.addActivity(
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'Activity: ${data['args']['activity']['details'] ?? 'Unknown'}',
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);
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final label = data['args']['activity']['details'] ?? 'Unknown';
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final appId = socket.clientId;
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try {
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await setRemoteActivityStatus(ref, label, appId);
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} catch (e) {
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developer.log(
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'Failed to set remote activity status: $e',
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name: kRpcLogPrefix,
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);
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}
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socket.send({
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'cmd': 'SET_ACTIVITY',
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'data': data['args']['activity'],
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'evt': null,
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'nonce': data['nonce'],
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});
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}
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},
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'close': (socket) async {
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notifier.updateStatus('Client disconnected');
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final appId = socket.clientId;
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try {
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await unsetRemoteActivityStatus(ref, appId);
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} catch (e) {
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developer.log(
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'Failed to unset remote activity status: $e',
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name: kRpcLogPrefix,
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);
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}
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},
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});
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return notifier;
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});
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final rpcServerProvider = Provider<ActivityRpcServer>((ref) {
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final notifier = ref.watch(rpcServerStateProvider.notifier);
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return notifier.server;
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});
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Future<void> setRemoteActivityStatus(
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Ref ref,
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String label,
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String appId,
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) async {
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final apiClient = ref.read(apiClientProvider);
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await apiClient.post(
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'/id/accounts/me/statuses',
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data: {
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'is_invisible': false,
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'is_not_disturb': false,
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'is_automated': true,
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'label': label,
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'app_identifier': appId,
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},
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);
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}
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Future<void> unsetRemoteActivityStatus(Ref ref, String appId) async {
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final apiClient = ref.read(apiClientProvider);
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await apiClient.delete(
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'/id/accounts/me/statuses',
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queryParameters: {'app': appId},
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);
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}
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Block a user