我在将用户添加到房间列表时遇到问题，我可以设法在全局级别（每个用户连接）上进行，但是在房间的基础上添加和删除用户，我似乎无法掌握。< / p>
我添加了一个名为
的新变量roomUsers
app.js
var express = require('express')
, app = express()
, http = require('http')
, server = http.createServer(app)
, io = require('socket.io').listen(server);
server.listen(8080);
// routing
app.get('/', function (req, res) {
res.sendfile(__dirname + '/index.html');
});
// usernames which are currently connected to the chat
var usernames = {};
// usernames which are currently connected to the chat
var roomUsers = {};
// rooms which are currently available in chat
var rooms = ['room1','room2','room3'];
io.sockets.on('connection', function (socket) {
// when the client emits 'adduser', this listens and executes
socket.on('adduser', function(username){
// store the username in the socket session for this client
socket.username = username;
// store the room name in the socket session for this client
socket.room = 'room1';
// add the client's username to the global list
usernames[username] = username;
// send client to room 1
socket.join('room1');
// echo to client they've connected
socket.emit('updatechat', 'SERVER', 'you have connected to room1');
// echo to room 1 that a person has connected to their room
socket.broadcast.to('room1').emit('updatechat', 'SERVER', username + ' has connected to this room');
socket.emit('updaterooms', rooms, 'room1');
// update the list of users in chat,client side
io.sockets.emit('updateUsers', usernames);
//
//io.sockets.in(socket.room).emit('updateUsers', usernames);
});
// when the client emits 'sendchat', this listens and executes
socket.on('sendchat', function (data) {
// we tell the client to execute 'updatechat' with 2 parameters
io.sockets.in(socket.room).emit('updatechat', socket.username, data);
});
socket.on('switchRoom', function(newroom){
socket.leave(socket.room);
socket.join(newroom);
socket.emit('updatechat', 'SERVER', 'you have connected to '+ newroom);
// sent message to OLD room
socket.broadcast.to(socket.room).emit('updatechat', 'SERVER', socket.username+' has left this room');
delete usernames[socket.username];
// update socket session room title
socket.room = newroom;
socket.broadcast.to(newroom).emit('updatechat', 'SERVER', socket.username+' has joined this room');
socket.emit('updaterooms', rooms, newroom);
io.sockets.emit('updateUsers', usernames);
});
// when the user disconnects.. perform this
socket.on('disconnect', function(){
// remove the username from global usernames list
delete usernames[socket.username];
// update list of users in chat, client-side
io.sockets.emit('updateUsers', usernames);
// echo globally that this client has left
socket.broadcast.emit('updatechat', 'SERVER', socket.username + ' has disconnected');
socket.leave(socket.room);
});
});
有没有任何建议我在io.sockets.emit（'updateUsers'，usernames）中出错了;并删除用户名[socket.username]; （显然我需要将其更改为roomUsers）
frontend.js
var socket = io.connect('http://localhost:8080');
// on connection to server, ask for user's name with an anonymous callback
socket.on('connect', function(){
// call the server-side function 'adduser' and send one parameter (value of prompt)
socket.emit('adduser', prompt("What's your name?"));
});
// listener, whenever the server emits 'updatechat', this updates the chat body
socket.on('updatechat', function (username, data) {
$('#conversation').append('<b>'+username + '></b> ' + data + '<br>');
});
// listener, whenever the server emits 'updateusers', this updates the username list
socket.on('updateUsers', function(data) {
$('#users').empty();
$.each(data, function(key, value) {
$('#users').append('<div>' + key + '</div>');
});
});
// listener, whenever the server emits 'updaterooms', this updates the room the client is in
socket.on('updaterooms', function(rooms, current_room) {
$('#rooms').empty();
$.each(rooms, function(key, value) {
if(value == current_room){
$('#rooms').append('<div>' + value + '</div>');
}
else {
$('#rooms').append('<div><a href="#" onclick="switchRoom(\''+value+'\')">' + value + '</a></div>');
}
});
});
function switchRoom(room){
socket.emit('switchRoom', room);
}
// on load of page
$(function(){
// when the client clicks SEND
$('#datasend').click( function() {
var message = $('#data').val();
$('#data').val('');
// tell server to execute 'sendchat' and send along one parameter
socket.emit('sendchat', message);
});
// when the client hits ENTER on their keyboard
$('#data').keypress(function(e) {
if(e.which == 13) {
$(this).blur();
$('#datasend').focus().click();
}
});
});
的index.html
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script src="http://localhost:8888/chat/js/frontend.js"></script>
<div style="float:left;width:100px;border-right:1px solid black;height:300px;padding:10px;overflow:scroll-y;">
<b>ROOMS</b>
<div id="rooms"></div>
</div>
<div style="float:left;width:100px;border-right:1px solid black;height:300px;padding:10px;overflow:scroll-y;">
<b>USERS</b>
<div id="users"></div>
</div>
<div style="float:left;width:300px;height:250px;overflow:scroll-y;padding:10px;">
<div id="conversation"></div>
<input id="data" style="width:200px;" />
<input type="button" id="datasend" value="send" />
</div>
答案 0 :(得分：0)
您应该在utils文件夹下的users.js中定义添加/删除函数，然后将其导入到app.js中。
users.js
let users = [];
const addUser = ({ id, username, room }) => {
// Clean the data
username = username.trim().toLowerCase();
room = room.trim().toLowerCase();
// always validate the data
if (!username || !room) {
return {
error: "Username and room are required!"
};
}
// Check for existing user
const userExist = users.find(user => {
return user.room === room && user.username === username;
});
// Validate username
if (userExist) {
return {
error: "Username is in use!"
};
}
// Store user
const user = { id, username, room };
users.push(user);
return { user };
};
const removeUser = id => {
const index = users.findIndex(user => {
user.id === id;
});
if (index !== 1) {
//splice method returns the removed the user
return users.splice(index, 1);
}
};
module.exports = { addUser, removeUser};
当用户提交登录表单并加入会议室时，将添加用户。我们需要removeUser来发送处于特定房间的断开连接的用户。
app.js
const { addUser, removeUser} = require("./utils/users");
//a simple utility function that send text and date
const { sendMessage } = require("./utils/messages");
io.on("connection", socket => {
//once user submitted the form, server receives the username and room info. data={username,room}
socket.on("join", (data, callback) => {
//if you check addUser function it either returns error or user
const { error, user } = addUser({ id: socket.id, ...data });
if (error) {
return callback(error);
}
//if there is no error, user joins the room
socket.join(user.room);
//send this generated message to the connected users
socket.emit("message", sendMessage("Admin", "Welcome!"));
//user broadcast to send info all users in the room but the last joined
socket.broadcast
.to(user.room)
.emit(
"message",
sendMessage("Admin", `${user.username} has joined!`)
);
callback();
});
socket.on("disconnect", () => {
//socket.id is generated by socket upon connection
const user = removeUser(socket.id);
if (user) {
io.to(user.room).emit(
"message",
sendMessage("Admin", `${user.name} has left`)
);
}
});
/utils/messages.js
const generateMessage = function(username, text) {
return {
username,
text,
created: new Date().getTime()
};
};
module.exports = { generateMessage };