在 lib 目录下新建一个 socket 目录 里面创建两个文件main.dart和router.dart; main.dart : 主要控制websocket的连接 断开 和收到消息的处理; router.dart 则为websocket 服务端返回的消息做路由处理;

router.dart

import 'package:lee/logic/user.dart';typedef void RouteHandle(Map params);var wsRouter = new WsRouter();class WsRouter { static Map _routers = new Map(); init() {  routers.forEach((route) {   route.forEach((name, value) {    this.add(name, value);   });  }); } // 增加路由 void add(String name, RouteHandle handle) {  WsRouter._routers[name] = handle; } // 路由处理 Future handle(String name, Map params) async {  RouteHandle handle = WsRouter._routers[name];  if (handle == null) {   print("路由不存在");   return;  }  handle(params); }}List> routers = [ {"login": UserLogic.login}, {"kick": UserLogic.kick},];

main.dart

import 'package:lee/socket/router.dart';import 'package:web_socket_channel/io.dart';import 'dart:convert';var webSocket = new WebSocket();class WebSocket { // webSocket连接 IOWebSocketChannel webSocketChannel; factory WebSocket() => _webSocket(); static WebSocket _instance; // 构造函数 WebSocket._() {  // 初始化webSocket路由  wsRouter.init(); } static WebSocket _webSocket() {  if (_instance == null) {   _instance = WebSocket._();  }  return _instance; } conn() {  IOWebSocketChannel channel = new IOWebSocketChannel.connect(    "ws://127.0.0.1:8080/ws",    pingInterval: Duration(milliseconds: 100));  channel.stream    .listen((data) => onMessage(data), onError: onError, onDone: onDone);  this.webSocketChannel = channel; } onMessage(response) async {  // 例如服务端返回的大概是这样一个json  // {"cmd":"kick","data":{}}  // {"cmd":"login","data":{}}  Map params = json.decode(response);  wsRouter.handle(params["cmd"], params["data"]); } onError(err) async {} onDone() async {}}