socket-protect

$3

> - Nodejs v8.x
> - Socket.io v2.x

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$3

npm install socket-protect --save

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$3

> - origin - {Array} - array of allowed origins. Default: [] - allow all
> - ipLimit- {Integer} - Number of allowed connections per ip. Default: 0
> - secure- {Boolean} - true if using https, false if http. Default: true
> - xdomain - {Boolean} - true - allow cross-domain. Default: false
> - debug - {Boolean}- set true to show debuggin messages. Default: false
> - login - {Object}
> - required - {Boolean} - true if authentication is required. Default: false
> - loginfn - {Function} - the authentication function that will return a Boolean callback. Default: noop()
> - timeout - {Number} - The time in ms, before socket is disconnected without authenticating. Default: 3000
> - ddos - {Object}
> - enabled - {Boolean} - Set true to enable rate limit on all connections. Default: true
> - timeout - {Number} - Time in ms that must be met before a connection is accepted. Default: 50

``js
const defaultOpts = {
origin: [],
secure: true,
xdomain: false,
debug: false,
ipLimit: 0,
login: {
required: false,
loginfn: noop,
timeout: 3000 // 3 seconds
},
ddos: {
enabled: true,
timeout: 50 // 50 ms
}
};
`
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$3

> - protectHandshake {Function} - Used for protecting handshake between client and server
> - protectConnect {Function} - Specially used if options.login.required is true.

$3

`js
const app = require('http').createServer(handler);
const io = require('socket.io')(app, {
pingInterval: 10000,
pingTimeout: 5000
});
const sp = require('socket-protect');

app.listen(8080, () => {
console.log('Server listening to port ', 8080);
});

function handler(req, res) {
res.writeHead(200);
res.end('Hello World');
}

const auth = (socket, cb) => {
socket.on('auth', () => {
cb(true);
});
};
const protectOpts = {
origin: ['http://s.bitsler.com'],
ipLimit: 4,
secure: true,
xdomain: true,
debug: false,
login: {
required: true,
loginfn: auth,
timeout: 3000 // 3 seconds
},
ddos: {
enabled: true,
timeout: 500 // 500 ms
}
};
io.use((socket, next) => {
sp.protectHandshake(io, socket, protectOpts);
next();
});
io.on('connection', socket => {
sp.protectConnect(socket, protectOpts);

// put your other events
socket.on('message', data => {
console.log(data);
});
});

``