How to implement voice chat in node

Node method to implement voice chat: 1. Use the nodejs module express to create a web server; 2. Create an https connection; 3. Real-time communication between the client and the server through "socket.io".

## The operating environment of this tutorial: Windows 10 system, node-v16 .Version 18.0, how to implement voice chat on DELL G3 computer

node?

Voice chat based on nodejs

Description

The program is in The group chat function of

iamshaunjp uses webRTC technology and adds a voice group chat function. When others are typing on the keyboard, a message similar to WeChat showing that the other party is typing will appear.

demo：
• https://www.php.cn/link/b2fc614266ad3627dca4dc5d37885d58
source code:
• https://www.php. cn/link/12a8193db4825679dc9baf49305efe92

Used nodejs module

• express: Create a web server
• https: Create https connection (LAN or external network webRTC requires https connection, see tutoril for details)
• socket.io ：Real-time communication between client and server

js file

##chat.js
• ：Registration of button events, Sending text data, etc.
record.js
• : Realizing the recording, playing, and sending of voice messages, etc.

Structural chart and process Figure

Text communication

See

public/js for details /chat.jsComments##Send data

Enter the page to connect to the server

socket

• The client inputs text data
The customer clicks the
• sent
button, triggers the
• click event, and generates the chat event to prepare for the serveremitsoket
Connect the chat event sent to the server and the data generated by the client
Receive data

socket

Receive the data sent by the server and the chat event sent by the server
• Extract the data text
js in
• index. html
Add text data, complete receiving data and display

Voice communication

See

public/js/record for details. js

CommentAccepting and sending voice data is similar to the communication of text data

Use
• webRTC
to obtain the user's video or audio conversion The data is in
• blob format and sent to the server. When receiving a message, the data type is in blob
format. The
• blob data is parsed and played using the html5 audio tag

Server forwards data

The client sends data to the server, and the server triggers the chat

event and sends the data sent by the client to each client in the form of broadcast. Complete the group chat function.

Create https certificate

Using webRTC on localhost does not require the use of https, but when using webRTC on the local area network or external network, webRTC must be forced to be used. Here, you generate the certificate yourself. For testing use, specific generation method and setting https methodRefer to blog

:

Generate your own signed certificate (valid for 365 days)

 openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 365

Use https connection express, the example is as follows:

  var fs = require('fs'),
    https = require('https'),
    express = require('express'),
    app = express();

    https.createServer({
      key: fs.readFileSync('key.pem'),
      cert: fs.readFileSync('cert.pem')
    }, app).listen(55555);

    app.get('/', function (req, res) {
      res.header('Content-type', 'text/html');
      return res.end('<h1 id="Hello-Secure-World">Hello, Secure World!</h1>');
    });

recommends learning: "

node.js video tutorial

"

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