expresssocket

An unoppinianated library for the http upgrade event's socket routing

It's used to create socket routes in express

It's usually used in tandom with ws

usage:

const express = require("express");
const app = express();
const _ = require("express-socket-routes")(app);

the "_" is used so that you can ignore the return as the function is of the return type void

Routing:

app.sRoute("/room/:id", (request, socket, head) => {});

using it in your application:

Demo App 1 (demonstrates usage with only one websocket server):

const WebSocket = require("ws");
const webSocketServer = new WebSocket.Server({ noServer: true });

app.sRoute("/room/:id", (request, socket, head) => {
  webSocketServer.handleUpgrade(request, socket, head, (webSocket) => {
    webSocketServer.emit("connection", webSocket, request);
  });
});

Demo App 2 (demonstrates usage with Many websocket servers):

const _ = require("express-socket-routes")(app);
const WebSocket = require("ws");

const webSocketServers = {};

app.sRoute("/room/:id", (req, socket, head) => {
  const roomId = req.params.id;
  let newlyCreatedWebSocketServer;
  if (!webSocketServers[roomId]) {
    // create a new websocket server for this room
    newlyCreatedWebSocketServer = new WebSocket.Server({ noServer: true });

    newlyCreatedWebSocketServer.on("connection", (ws) => {
      // connection handling here
    });
    webSocketServers[roomId] = newlyCreatedWebSocketServer;
  }

  newlyCreatedWebSocketServer.handleUpgrade(req, socket, head, (ws) => {
    newlyCreatedWebSocketServer.emit("connection", ws);
  });
});

Common errors:

• using "room/:id" instead of "/room/:id" as routes