flutter 自定义websocket路由的实现

在 flutter websocket 中服务端推送数据给客户端后很多人的处理居然都是 if / switch; 感觉这样的写法不咋好!

自己想的一个办法:

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<String, RouteHandle  _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<void  handle(String name, Map params) async {
  RouteHandle handle = WsRouter._routers[name];
  if (handle == null) {
   print("路由不存在");
   return;
  }
  handle(params);
 }
}

List<Map<String, RouteHandle   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 {}
}

以上就是本文的全部内容，希望对大家的学习有所帮助。