Example of creating a simple chat room using nodejs + socket

Note: Part of es6 is referenced. The chat room is simple, that is, the room creation, name change, simple chat, and other functions!

Command:

/Nick username // modify username

/Join room name // modify room name

Entry file server. js

Const http = require ("http ");

Const fs = require ("fs ");

Const path = require ("path ");

Const mime = require ("mime ");

Var cache = {};

Const hostname = "127.0.0.1 ";

Const port = 3000;

Var send404 = (response) => {
Response. writeHead (404, {"Content-Type": "text/plain "});
Response. write ("error: 404 ");
Response. end ()
}

Var sendFile = (response, filePath, fileContents) => {
Response. writeHead (200, {"Content-Type": mime. lookup (path. basename (filePath ))});
Response. end (fileContents)
}

Var serveStatic = (response, cache, absPath) => {
If (cache [absPath]) {
SendFile (response, absPath, cache [absPath]);
} Else {
Fs. exists (absPath, (exists) => {
If (exists ){
Fs. readFile (absPath, (err, data) => {
If (err ){
Send404 (response );
} Else {
Cache [absPath] = data;
SendFile (response, absPath, data)
     }

})
} Else {
Send404 (response );
   }
})
 }
}

Var server = http. createServer (req, res) => {
Var filePath = false;
If (req. url = '/'){
FilePath = 'public/index.html'
} Else {
FilePath = 'public' + req. url
 }
Var absPath = './' + filePath;
ServeStatic (res, cache, absPath)
});

Server. listen (port, hostname, () => {
Console. log ('Hello, welcome to nodejs, you are already at http: // $ {hostname }:$ {port }/')
});

Var chatServer = require ("./lib/chat_server ");
ChatServer. listen (server );

App. js demonstrates creating a local https server.

Var https = require ('https ')
Const fs = require ("fs ")
Const hostname = '2017. 0.0.1'
Const port = 3000

Const options = {
Key: fs. readFileSync ("./key. pem "),
Cert: fs. readFileSync ("./key-cert.pem ")
}

Const server = https. createServer (options, (req, res) => {
Res. statusCode = 200
Res. setHeader ('content-type', 'text/plain ')
Res. end ('Hello World \ n ')
})

Server. listen (port, hostname, () => {
Console. log ('server running at https: // $ {hostname }:: {port }/')
})

Create the private key. pem command for the local https server

Openssl genrsa 1024> key. pem command

In addition to the private key, you also need to use the certificate to create a local certificate command:

Openssl req-x509-new-key. pem> key-cert.pem

The basic code is as follows:

Var https = require ('https ')
Const fs = require ("fs ")
Const hostname = '2017. 0.0.1'
Const port = 3000

Const options = {
Key: fs. readFileSync ("./key. pem "),
Cert: fs. readFileSync ("./key-cert.pem ")
    }

Const server = https. createServer (options, (req, res) => {
Res. statusCode = 200
Res. setHeader ('content-type', 'text/plain ')
Res. end ('Hello World \ n ')
})

Server. listen (port, hostname, () => {
Console. log ('server running at https: // $ {hostname }:: {port }/')
})
Because our certificates are not issued by the certificate authority, there will be a security prompt. If you want to use https on the server, you need to find a certificate authority (CA) to register, and obtain a real and trusted certificate for your server!