126 lines
No EOL
5 KiB
JavaScript
126 lines
No EOL
5 KiB
JavaScript
const User = require('../../../models/User');
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const secret = require('../../../secret');
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const config = require('../../../config');
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const Category = require('../../../models/Category');
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const jwt = require('jsonwebtoken');
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const siolib = require('socket.io');
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const uuid = require('uuid');
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class GatewayServer {
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constructor(httpServer) {
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this._io = siolib(httpServer);
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this._gateway = this._io.of('/gateway');
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this.eventSetup();
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}
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}
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GatewayServer.prototype.authDisconnect = function(socket, callback) {
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console.log('[E] [gateway] [handshake] User disconnected due to failed authentication');
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socket.isConnected = false;
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socket.disconnect();
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socket.disconnect(true);
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callback(new Error('ERR_GATEWAY_AUTH_FAIL'));
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};
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GatewayServer.prototype.eventSetup = function() {
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this._gateway.use((socket, callback) => {
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console.log('[*] [gateway] [handshake] User authentication attempt');
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socket.isConnected = false;
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setTimeout(() => {
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if (socket.isConnected) return;
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console.log('[E] [gateway] [handshake] User still not connected after timeout, removing...');
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socket.disconnect();
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socket.disconnect(true);
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}, config.gatewayStillNotConnectedTimeoutMS);
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// TODO: Maybe passing the token in the query is not the best idea?
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const token = socket.handshake.query.token;
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if (!token) return this.authDisconnect(socket, callback);
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jwt.verify(token, secret.jwtPrivateKey, {}, async (err, data) => {
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if (err) return this.authDisconnect(socket, callback);
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if (!data) return this.authDisconnect(socket, callback);
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if (!data.username) return this.authDisconnect(socket, callback);
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const user = await User.findByUsername(data.username);
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if (!user) return this.authDisconnect(socket, callback);
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let permissionLevel = config.roleMap[user.role];
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if (!permissionLevel) {
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permissionLevel = 0;
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}
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if (permissionLevel < config.roleMap.USER) return this.authDisconnect(socket, callback);
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socket.user = {
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username: data.username,
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_id: user._id
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};
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console.log(`[*] [gateway] [handshake] User ${data.username} has successfully authenticated`);
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return callback();
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});
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});
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this._gateway.on('connection', (socket) => {
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console.log(`[*] [gateway] [handshake] User ${socket.user.username} connected, sending hello and waiting for yoo...`);
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socket.emit('hello', {
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gatewayStillNotConnectedTimeoutMS: config.gatewayStillNotConnectedTimeoutMS,
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resolvedUser: {
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username: socket.user.username,
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_id: socket.user._id
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}
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});
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socket.once('yoo', () => {
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console.log(`[*] [gateway] [handshake] Got yoo from ${socket.user.username}, connection is finally completed!`);
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socket.isConnected = true;
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socket.on('message', ({ category, content }) => {
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if (!category || !content || !socket.joinedCategories || !socket.isConnected || !socket.user) return;
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content = content.trim();
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if (!content || content === '' || content === ' ' || content.length >= 2000) return;
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// TODO: When/if category permissions are added, check if the user has permissions for that category
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const categoryTitle = socket.joinedCategories[category._id];
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if (!categoryTitle) return;
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const messageObject = {
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author: {
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username: socket.user.username,
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_id: socket.user._id
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},
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category: {
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title: categoryTitle,
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_id: category._id
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},
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content: content,
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_id: uuid.v4()
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};
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this._gateway.in(category._id).emit('message', messageObject);
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});
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socket.on('subscribe', async (categories) => {
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if ( !socket.isConnected || !socket.user || !categories || !Array.isArray(categories) || categories === []) return;
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for (const v of categories) {
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if (!v) continue;
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// TODO: When/if category permissions are added, check if the user has permissions for that category
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const category = await Category.findById(v);
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if (category && category.title && category._id) {
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if (!socket.joinedCategories) socket.joinedCategories = {};
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if (socket.joinedCategories[v]) continue;
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socket.joinedCategories[v] = category.title;
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await socket.join(v);
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}
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}
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});
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});
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});
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};
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module.exports = GatewayServer; |