Simple multi-room online group chat implementation method

This article mainly introduces the example of vue+socket.io+express+mongodb to implement a simple multi-room online group chat. It has certain reference value and interested friends can refer to it. Hope it helps everyone.

Project Introduction

Mainly by doing a small project for multi-person online multi-room group chat, to practice the combined use of full-stack technologies.

Project source code: chat-vue-node

Main technology: vue2 family bucket + socket.io + node(express) + mongodb(mongoose)

Environment Configuration: The node and mongodb environment need to be installed and configured; it is recommended to install the Robomogo client to manage mongodb data.

Compile and run:

1. Start the MongoDB service and create a new command line window 1:

mongod

2 .Start the server node and create a new command line window 2:

cd server
node index.js

3. Start the front-end vue page

cd client
cnpm install
npm run dev

Then open localhost:8080 in multiple windows of the browser, register different accounts and log in to conduct multi-user multi-room online chat.

Main effect preview:

Code directory overview

|--chat-vue-node
  |--client        // 前端客户端：基于 vue-cli 搭建的所有聊天页面
  |--server        // 后台服务端
    |--api.js       // express 通过 mongoose 操作 mongodb 数据库的所有接口
    |--db.js       // 数据库初始化、Schema数据模型
    |--index.js      // 后台服务启动入口
    |--package.json
  .gitignore
  README.md

soeket.io Basics

soeket.io The basic functions used in this project are as follows (for details, please see chatGroup.vue and server/index in GitHub. js two file codes):

// 客户端连接
var socket = io.connect('http://localhost:8081')
// 服务端监听到连接
io.on('connection', function(socket){
 // ......
}

// 客户端发送进入房间请求
socket.emit('joinToRoom', data)
// 服务端监听
socket.on('joinToRoom', function (data) {
 // ......
 // 服务端处理进入房间、离开房间
 socket.join(roomGroupId)
 // 有人进入房间，向该群其它的成员发送更新在线成员
 io.sockets.in(roomGroupId).emit('joinToRoom', chat)
 io.sockets.in(roomGroupId).emit('updateGroupNumber', roomNum[roomGroupId])
}

// 客户端发送聊天消息
socket.emit('emitChat', chat)
// 服务端监听并向群内其它人群发该消息
socket.on('emitChat', function (data) {
 let roomGroupId = chat.chatToGroup
 // 向特定的群成员转发消息
 socket.in(roomGroupId).emit('broadChat', chat)
})

Data structure design

There are three main data structure models:

// 用户信息的数据结构模型
const accountSchema = new Schema({
 account: {type: Number},  // 用户账号
 nickName: {type: String},  // 用户昵称
 pass: {type: Number},    // 密码
 regTime: {type: Number}   // 注册时间
})
// 聊天群的数据结构模型：聊天群包含的成员
const relationSchema = new Schema({
 groupAccount: Number,    // 群账号
 groupNickName: String,   // 群昵称
 groupNumber: []       // 群成员
})
// 单个聊天群的聊天消息记录
const groupSchema = new Schema({
 account: Number,      // 聊天者的账号
 nickName: String,      // 聊天者的昵称
 chatTime: Number,      // 发消息的时间戳
 chatMes: String,      // 聊天的消息内容
 chatToGroup: Number,    // 聊天的所在群账号
 chatType: String      // 消息类型：进入群、离开群、发消息
})

vue-router routing design

The page routing jumps are all handled by the front-end vue-router, and the page functions Few but complete, only 3: registration login page, personal center page, group chat page

routes: [
 // {path: '/', name: 'Hello', component: Hello},
 {path: '/', redirect: '/login', name: 'Hello', component: Hello},
 {path: '/login', name: 'Login', component: Login},
 {path: '/center', name: 'Center', component: Center},
 {path: '/chatGroup', name: 'ChatGroup', component: ChatGroup}
]
// 未登录时，通过编程式跳去登录页：
router.push({ path: 'login' })

vuex global status

Mainly use vuex to globally manage the login status of personal accounts and the information of the current group chat room:

export default new Vuex.Store({
 state: {
  chatState: {
   account: null,
   nickName: null
  },
  groupState: null  // 点击进群的时候更新
 },
 mutations: {
  updateChatState (state, obj) {
   state.chatState = obj
  },
  updateGroupState (state, obj) {
   state.groupState = obj
  }
 },
 actions: {
  updateChatState ({commit}, obj) {
   commit('updateChatState', obj)
  },
  updateGroupState ({commit}, obj) {
   commit('updateGroupState', obj)
  }
 },
 getters: {
  getChatState (state) {
   return state.chatState
  },
  getGroupState (state) {
   return state.groupState
  }
 }
})

Update state globally and obtain state:

// 更新
this.$store.dispatch('updateChatState', {account: null, nickName: null})
// 获取
this.$store.getters.getChatState

Database interface api

module.exports = function (app) {
 app.all("*", function(req, res, next) {
  next()
 })
 // api login 登录
 app.get('/api/user/login', function (req, res) { // ... })
 // api register 注册
 app.get('/api/user/register', function (req, res) { // ... })
 // getAccountGroup 获取可进入的房间
 app.get('/api/user/getAccountGroup', function (req, res) { // ... })
 // getGroupNumber 获取当前房间的群成员
 app.get('/api/user/getGroupNumber', function (req, res) { // ... })
 // api getChatLog 获取当前房间的聊天记录
 app.get('/api/getChatLog', function (req, res) { // ... })
 app.get('*', function(req, res){
  res.end('404')
 })
}

For more detailed implementation, please see the source code chat-vue- node , which retains many comments during development and exploration.

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