javascript - Spring stomp websockets with vue.js

Question

我正在尝试将 Spring websockets (STOMP) 与 Vue 结合使用，但不知道该怎么做，甚至不知道该怎么做。我的 websockets 使用纯 JS，但是当我尝试使用 Vue 时，我卡住了。这是我的 Vue 代码:

var app = new Vue({
el: '#app',
data: {
    stompClient: null,
    gold: 0
},
methods: {
    sendEvent: function () {
        this.stompClient.send("/app/hello", {}, JSON.stringify({'name': $("#name").val()}));
    }
},
created: function () {
    this.stompClient = Stomp.over(new SockJS('/gs-guide-websocket'));
    this.stompClient.connect()
    this.stompClient.subscribe('/topic/greetings', function (greeting) {
        console.log(JSON.parse(greeting.body).content);
    });
},

})

我的连接和发送功能正常，我可以在后端看到消息，但问题出在订阅功能上。它需要一个回调函数，但这永远不会触发。我还尝试在 vue 中创建一个方法并调用它

this.stompClient.subscribe('/topic/greetings', vueFunc())

但这也不起作用。我在 https://github.com/FlySkyBear/vue-stomp 找到了一些图书馆但我不知道如何使用它，它看起来真的很乱。那我宁愿使用纯 JS。

谁有解决办法？谢谢

Answer 1

这是使用 Spring Boot Websocket (STOMP) 和 Vue CLI 的工作示例。 (这里有更详细的描述http://kojotdev.com/2019/07/using-spring-websocket-stomp-application-with-vue-js/)

1. 从 https://spring.io/guides/gs/messaging-stomp-websocket/ 下载 Spring Boot 演示

2. 在WebSocketConfig中添加允许的来源

   @Override
   public void registerStompEndpoints(StompEndpointRegistry registry) {
       registry.addEndpoint("/gs-guide-websocket")
               .setAllowedOrigins("http://localhost:8081")
               .withSockJS();
   }
   

3. 运行项目

现在启动 Vue CLI 项目并:

1. 安装 SockJS npm install sockjs-client
2. 安装 STOMP npm install webstomp-client
3. 我使用引导类，所以你需要 npm install bootstrap@3 只是为了布局

添加 .vue 组件:

<template>
    <div>
        <div id="main-content" class="container">
            <div class="row">
                <div class="col-md-6">
                    <form class="form-inline">
                        <div class="form-group">
                            <label for="connect">WebSocket connection:</label>
                            <button id="connect" class="btn btn-default" type="submit" :disabled="connected == true" @click.prevent="connect">Connect</button>
                            <button id="disconnect" class="btn btn-default" type="submit" :disabled="connected == false" @click.prevent="disconnect">Disconnect
                            </button>
                        </div>
                    </form>
                </div>
                <div class="col-md-6">
                    <form class="form-inline">
                        <div class="form-group">
                            <label for="name">What is your name?</label>
                            <input type="text" id="name" class="form-control" v-model="send_message" placeholder="Your name here...">
                        </div>
                        <button id="send" class="btn btn-default" type="submit" @click.prevent="send">Send</button>
                    </form>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12">
                    <table id="conversation" class="table table-striped">
                        <thead>
                            <tr>
                                <th>Greetings</th>
                            </tr>
                        </thead>
                        <tbody>
                            <tr v-for="item in received_messages" :key="item">
                                <td>{{ item }}</td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import SockJS from "sockjs-client";
import Stomp from "webstomp-client";

export default {
  name: "websocketdemo",
  data() {
    return {
      received_messages: [],
      send_message: null,
      connected: false
    };
  },
  methods: {
    send() {
      console.log("Send message:" + this.send_message);
      if (this.stompClient && this.stompClient.connected) {
        const msg = { name: this.send_message };
        this.stompClient.send("/app/hello", JSON.stringify(msg), {});
      }
    },
    connect() {
      this.socket = new SockJS("http://localhost:8080/gs-guide-websocket");
      this.stompClient = Stomp.over(this.socket);
      this.stompClient.connect(
        {},
        frame => {
          this.connected = true;
          console.log(frame);
          this.stompClient.subscribe("/topic/greetings", tick => {
            console.log(tick);
            this.received_messages.push(JSON.parse(tick.body).content);
          });
        },
        error => {
          console.log(error);
          this.connected = false;
        }
      );
    },
    disconnect() {
      if (this.stompClient) {
        this.stompClient.disconnect();
      }
      this.connected = false;
    },
    tickleConnection() {
      this.connected ? this.disconnect() : this.connect();
    }
  },
  mounted() {
    // this.connect();
  }
};
</script>

<style scoped>

</style>

运行项目并测试，它应该默认从8081端口启动。