116 lines
3.4 KiB
Dart
116 lines
3.4 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'dart:convert';
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import 'dart:typed_data';
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class SocketClient {
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SocketClient(this._ipAddress, this._port);
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static const int headerSize = 10;
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static const int intSize = 4;
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late final String _ipAddress;
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late final int _port;
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late Socket? _socket;
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late List<int> _byteList = <int>[];
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late int _total = -1;
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late Function? eventDisconnected;
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late Function(String) eventReceiveMessage;
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void connect([void Function(bool result)? resultListener]) {
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bool connected = false;
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Socket.connect(_ipAddress, _port).then((socket) {
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try {
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_socket = socket;
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_socket!.listen(_onMessage, onError: _onError, onDone: _onDone);
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print('[SocketClient] Socket connected to $_ipAddress');
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connected = true;
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} catch (e) {
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print(e);
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}
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resultListener?.call(connected);
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// ignore: argument_type_not_assignable_to_error_handler
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}).catchError((AsyncError e) {
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print('Unable to connect: $e');
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resultListener?.call(connected);
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});
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}
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//extra: 6bytes의 커스텀 정보, 서버와 프로토콜이 맞춰져있어야함
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void send(String message, [List<int>? extra]) {
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final byteMessage = utf8.encode(message);
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// final byteLength = ByteArray(4);
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// byteLength.writeInt(byteMessage.length);
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// final byteArray = byteLength.buffer.asUint8List(0, 4);
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final byteLength = Uint8List(4);
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final byteDataLength = byteLength.buffer.asByteData();
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byteDataLength.setInt32(0, byteMessage.length);
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final byteArray = byteLength.buffer.asUint8List(0, 4);
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final byteExtra = extra == null ? [0, 0, 0, 0, 0, 0] : extra;
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final byteSend = byteArray + byteExtra + byteMessage;
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_socket!.add(byteSend);
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}
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void disconnect() {
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eventDisconnected?.call();
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_socket!.close();
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_socket = null;
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}
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void _onMessage(data) {
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final byteData = data as Uint8List;
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try {
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final bytesRead = byteData.length;
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//print('Data Recevied!! $bytesRead');
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if (bytesRead > 0) {
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_byteList += byteData;
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}
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_parsing();
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} on Exception catch (e) {
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print(e);
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print(utf8.decode(byteData));
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}
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}
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void _parsing() {
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if (_total < 0) {
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if (_byteList.length >= headerSize) {
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final bytesLength = Uint8List.fromList(
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_byteList.getRange(0, intSize).toList(growable: false));
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final bytesExtra = Uint8List.fromList(
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_byteList.getRange(intSize, headerSize).toList(growable: false));
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_total = bytesLength.buffer.asByteData().getInt32(0, Endian.big);
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// _total = ByteArray.fromBuffer(bytesLength.buffer).readInt();
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print(_total);
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if (_total == 0) {
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_total = -1;
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_byteList.clear();
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} else {
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_parsing();
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}
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}
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} else {
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if (_byteList.length >= _total + headerSize) {
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_byteList.removeRange(0, headerSize);
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final list = Uint8List.fromList(
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_byteList.getRange(0, _total).toList(growable: false));
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final message = utf8.decode(list);
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//print(message);
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eventReceiveMessage(message);
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_byteList = _byteList.getRange(_total, _byteList.length).toList();
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_total = -1;
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_parsing();
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}
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}
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}
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void _onError(error, StackTrace trace) {
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print('onError: $error');
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}
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void _onDone() {
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print('Disconnected');
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eventDisconnected?.call();
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}
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}
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