Creating a private chat between a key using a node.js and socket.io

Question

How do I emit a message to all users in a private chat sharing a conversation_id using node.js and socket.io?

var express = require('express'), app = express(), server = require('http').createServer(app), io = require('socket.io').listen(server); conversations = {}; app.get('/', function(req, res) { res.sendfile('/'); }); io.sockets.on('connection', function (socket) { socket.on('send message', function (data) { var conversation_id = data.conversation_id; if (conversation_id in conversations) { console.log (conversation_id + ' is already in the conversations object'); // emit the message [data.message] to all connected users in the conversation } else { socket.conversation_id = data; conversations[socket.conversation_id] = socket; conversations[conversation_id] = data.conversation_id; console.log ('adding ' + conversation_id + ' to conversations.'); // emit the message [data.message] to all connected users in the conversation } }) }); server.listen(8080);

stackoverflow.com/a/65787883/3904109 : have a look here also it might help — DragonFire
– DragonFire, Commented Jan 19, 2021 at 10:27

Community · Accepted Answer · 2017-05-23 11:54:59Z

You have to create a room with conversation_id and make users to subscribe to that room, so that you can emit a private message to that room it by,

client

var socket = io.connect('http://ip:port'); socket.emit('subscribe', conversation_id); socket.emit('send message', { room: conversation_id, message: "Some message" }); socket.on('conversation private post', function(data) { //display data.message });

Server

socket.on('subscribe', function(room) { console.log('joining room', room); socket.join(room); }); socket.on('send message', function(data) { console.log('sending room post', data.room); socket.broadcast.to(data.room).emit('conversation private post', { message: data.message }); });

Here is the docs and example for creating a room, subscribing to the room and Emit message to a room:

Great, thanks, it works perfectly. I changed socket.broadcast.to() to io.sockets.in() so that it includes the emitting socket.
this helped me a lot divillysausages.com/2015/07/12/an-intro-to-socket-io , see Sending a message to another user

Trojan · Accepted Answer · 2016-10-24 13:21:50Z

SURE: Simply,

This is what you need :

 io.to(socket.id).emit("event", data);

whenever a user joined to the server,socket details will be generated including ID.This is the ID really helps to send a message to particular people.

first we need to store all the socket.ids in array,

 var people={}; people[name] = socket.id;

here name is the reciever name. Example:

 people["ccccc"]=2387423cjhgfwerwer23;

So, now we can get that socket.id with the reciever name whenever we are sending message:

for this we need to know the recievername.You need to emit reciever name to the server.

final thing is:

 socket.on('chat message', function(data){ io.to(people[data.reciever]).emit('chat message', data.msg); });

Hope this works well for you.!!Good Luck

Collectives™ on Stack Overflow

Creating a private chat between a key using a node.js and socket.io

2 Answers 2

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Linked

Related