Simple, secure1 & standards compliant2 web server for the most demanding3 of applications. Read more...
### :zap: Simple performance
µWebSockets.js is a web server bypass for Node.js that reimplements eventing, networking, encryption, web protocols, routing and pub/sub in highly optimized C++. As such, µWebSockets.js delivers web serving for Node.js, **[8.5x that of Fastify](https://alexhultman.medium.com/serving-100k-requests-second-from-a-fanless-raspberry-pi-4-over-ethernet-fdd2c2e05a1e)** and at least **[10x that of Socket.IO](https://medium.com/swlh/100k-secure-websockets-with-raspberry-pi-4-1ba5d2127a23)**. It is also the built-in **[web server of Bun](https://bun.sh/)**.
- Browse the [documentation](https://unetworking.github.io/uWebSockets.js/generated/) and see the [main repo](https://github.com/NPM-Package-Jaykumar/uWebSockets). There are tons of [examples](examples) but here's the gist of it all:
```javascript
/* Non-SSL is simply App() */
require("uWebSockets.js")
.SSLApp({
/* There are more SSL options, cut for brevity */
key_file_name: "misc/key.pem",
cert_file_name: "misc/cert.pem",
})
.ws("/*", {
/* There are many common helper features */
idleTimeout: 32,
maxBackpressure: 1024,
maxPayloadLength: 512,
compression: DEDICATED_COMPRESSOR_3KB,
/* For brevity we skip the other events (upgrade, open, ping, pong, close) */
message: (ws, message, isBinary) => {
/* You can do app.publish('sensors/home/temperature', '22C') kind of pub/sub as well */
/* Here we echo the message back, using compression if available */
let ok = ws.send(message, isBinary, true);
},
})
.get("/*", (res, req) => {
/* It does Http as well */
res
.writeStatus("200 OK")
.writeHeader("IsExample", "Yes")
.end("Hello there!");
})
.listen(9001, (listenSocket) => {
if (listenSocket) {
console.log("Listening to port 9001");
}
});
```