项目中需要进行数据的实时推送， 所以采用了websocket+stomp的形式来做，增加断线重连机制，初始化连接后，可以在任意页面使用
1.安装依赖
yarn add stompjs
yarn add sockjs-client
2、新建store/modules/websocket.js
import SockJS from 'sockjs-client'
import Stomp from 'stompjs'
import { pimessagepush } from '@/api/user.js'
const state = {
url: '',
checkInterval: null, // 断线重连时 检测连接是否建立成功
websocket: null,
stompClient: null,
listenerList: [] // 监听器列表，断线重连时 用于重新注册监听
}
const mutations = {
WEBSOCKET_INIT(state, url) {
if (state.stompClient == null || !state.stompClient.connected) {
state.url = url
if (state.stompClient != null && state.websocket.readyState === SockJS.OPEN) {
state.stompClient.disconnect(() => {
this.commit('WEBSOCKET_CONNECT')
})
} else if (state.stompClient != null && state.websocket.readyState === SockJS.CONNECTING) {
console.log('连接正在建立')
return
} else {
this.commit('WEBSOCKET_CONNECT')
}
if (!state.checkInterval) {
const interval = setInterval(() => {
console.log('检测连接：' + state.websocket.readyState)
if (state.stompClient != null && state.stompClient.connected) {
clearInterval(state.checkInterval)
state.checkInterval = null
console.log('重连成功')
} else if (state.stompClient != null && state.websocket.readyState !== SockJS.CONNECTING) {
// websocket的状态为open 但是stompClient的状态却是未连接状态，故此处需要把连接断掉 然后重连
state.stompClient.disconnect(() => {
this.commit('WEBSOCKET_CONNECT')
})
}
}, 2000)
state.checkInterval = interval
}
} else {
console.log('连接已建立成功，不再执行')
}
},
WEBSOCKET_CONNECT(state) {
const _this = this
const websock = new SockJS(state.url)
state.websocket = websock
// 获取STOMP子协议的客户端对象
const stompClient = Stomp.over(websock)
stompClient.debug = null // 关闭控制台打印
stompClient.heartbeat.outgoing = 20000
stompClient.heartbeat.incoming = 0// 客户端不从服务端接收心跳包
// 向服务器发起websocket连接
stompClient.connect(
{ name: 'test' }, // 此处注意更换自己的用户名，最好以参数形式带入
frame => {
console.log('链接成功！')
state.listenerList.forEach(item => {
state.stompClient.subscribe(item.topic, item.callback)
})
// unsubscribe()可以用来取消客户端对这个目的地destination的订阅
// stompClient.subscribe("/user/queue/message", msg => {
// // this.getData(msg);
// console.log(msg)
// });
},
() => { // 第一次连接失败和连接后断开连接都会调用这个函数 此处调用重连
setTimeout(() => {
_this.commit('WEBSOCKET_INIT', state.url)
}, 1000)
}
)
state.stompClient = stompClient
},
WEBSOCKET_SEND(state, p) {
console.log('发送信息', p)
state.stompClient.send(p.topic, {}, p.data)
},
WEBSOCKET_UNSUBSRCIBE(state, p) {
state.stompClient.unsubscribe(p)
for (let i = 0; i < state.listenerList.length; i++) {
if (state.listenerList[i].topic === p) {
state.listenerList.splice(i, 1)
console.log('解除订阅：' + p + ' size:' + state.listenerList.length)
break
}
}
}
}
const actions = {
WEBSOCKET_INIT({ commit }, url) {
commit('WEBSOCKET_INIT', url)
},
WEBSOCKET_SEND({ commit }, p) {
commit('WEBSOCKET_SEND', p)
},
WEBSOCKET_UNSUBSRCIBE({ commit }, p) {
commit('WEBSOCKET_UNSUBSRCIBE', p)
},
// 接口形式推送消息
PUSH_CODE({ commit }, { subjectIcfRecordId, code }) {
const params = {
subjectIcfRecordId: subjectIcfRecordId,
code: code
}
console.log('store推送消息', params)
pimessagepush(params)
}
}
export default {
state,
mutations,
actions
}
3、store/getters.js
const getters = {
stompClient: state => state.websocket.stompClient,
}
export default getters
4、新建mixin/mixin_websocket.js 以便全局使用
websocket 链接的地址、接收、取消消息的地址更换实际的
export const mixins = {
computed: {
global_uuid() {
const subjectIcfRecordId = this.$store.getters.subjectIcfRecordId
const subjectId = this.$store.getters.subjectId
return `${subjectIcfRecordId}-1-${subjectId}`
}
},
methods: {
// websocket建立链接
global_websocket_connect() {
const baseUrl = this.$baseApi
const wsUrl = `${baseUrl}/oceanus-socket/server-ws`
this.$store.dispatch('WEBSOCKET_INIT', wsUrl) // 建立链接
},
// 发送消息
global_websocket_send_message(code) {
const params = {
subjectIcfRecordId: this.$store.getters.subjectIcfRecordId,
code: code
}
this.$store.dispatch('PUSH_CODE', params)
},
// 接收订阅消息
global_websocket_receive_message() {
const stompClient = this.$store.getters.stompClient
const interval = setInterval(() => { // 增改轮询解决刷新问题
if (stompClient != null && stompClient.connected) {
clearInterval(interval)
stompClient.subscribe(`/topic/${this.global_uuid}/messages`, res => {
const result = JSON.parse(res.body)
console.log('接收消息', result)
if (result.data === '2203' || result.data === '2106') { // 电子签名按钮可以显示
this.$store.commit('SET_SHOW_SIGN_BTN', true)
}
if (result.data === '2101') { // 知情同意悬浮按钮显示
this.$store.commit('SET_SHOW_READ_BTN', true)
this.toRead()
}
})
} else {
console.log('等待连接中')
}
}, 1000)
},
// 取消订阅消息
global_websocket_unsubscribe() {
const stompClient = this.$store.getters.stompClient
if (stompClient != null && stompClient.connected) {
this.$store.dispatch('WEBSOCKET_UNSUBSRCIBE', `/topic/${this.global_uuid}/messages`)
}
},
// 获取url参数方法
global_getQueryString(name) {
var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i')
var r = window.location.search.substr(1).match(reg)
if (r != null) return unescape(r[2])
return null
}
}
}
5、将mixin设置为全局
import { mixins } from './mixin/mixin_websocket'
Vue.mixin(mixins)
这样就配置好了，接下来就可以在使用的页面调用了,本项目发送消息是通过掉后端接口形式
//test.vue
created() {
this.global_websocket_connect() // websocket建立链接
}
mounted(){
const code = this.knowingType === '21' ? '2101' : '2205'
this.global_websocket_send_message(code) // 发送消息 开始阅读中
this.global_websocket_receive_message() // 接收消息
}