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remove unmaintained fastify plugin #533

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3d669cd
remove unmantained fastify plugin
rodrigov9 Apr 21, 2026
4233c6b
add server closing to the server initialization with fastify guide
rodrigov9 Apr 21, 2026
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83 changes: 45 additions & 38 deletions docs/categories/02-Server/server-initialization.md
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Expand Up @@ -513,83 +513,90 @@ NestJS v7 and below relies on Socket.IO v2, while NestJS v8 relies on Socket.IO

### With Fastify

You need to register the [`fastify-socket.io`](https://github.com/alemagio/fastify-socket.io) plugin:

<Tabs groupId="lang">
<TabItem value="cjs" label="CommonJS" default>

```js
const fastify = require("fastify");
const fastifyIO = require("fastify-socket.io");
const { Server } = require("socket.io");

const server = fastify();
server.register(fastifyIO);
const fastify = require('fastify')();
const io = new Server(fastify.server, { /* options */ });

server.get("/", (req, reply) => {
server.io.emit("hello");
io.on("connection", (socket) => {
// ...
});

server.ready().then(() => {
// we need to wait for the server to be ready, else `server.io` is undefined
server.io.on("connection", (socket) => {
// ...
});
app.addHook('preClose', done => {
io.local.disconnectSockets(true);
done();
});

server.listen({ port: 3000 });
app.addHook('onClose', (_instance, done) => {
io.close(done);
});

fastify.listen({ port: 3000 });
```

</TabItem>
<TabItem value="mjs" label="ES modules">

```js
import fastify from "fastify";
import fastifyIO from "fastify-socket.io";
import Fastify from 'fastify';
import { Server } from "socket.io";
const { Server } = require("socket.io");

const server = fastify();
server.register(fastifyIO);
const fastify = Fastify();
const io = new Server(fastify.server, { /* options */ });

io.on("connection", (socket) => {
// ...
});

server.get("/", (req, reply) => {
server.io.emit("hello");
app.addHook('preClose', done => {
io.local.disconnectSockets(true);
done();
});

server.ready().then(() => {
// we need to wait for the server to be ready, else `server.io` is undefined
server.io.on("connection", (socket) => {
// ...
});
app.addHook('onClose', (_instance, done) => {
io.close(done);
});

server.listen({ port: 3000 });
fastify.listen({ port: 3000 });
```

</TabItem>
<TabItem value="ts" label="TypeScript">

```ts
import fastify from "fastify";
import fastifyIO from "fastify-socket.io";
import Fastify from 'fastify';
import { Server } from "socket.io";
const { Server } = require("socket.io");

const server = fastify();
server.register(fastifyIO);
const fastify = Fastify();
const io = new Server(fastify.server, { /* options */ });

server.get("/", (req, reply) => {
server.io.emit("hello");
io.on("connection", (socket) => {
// ...
});

server.ready().then(() => {
// we need to wait for the server to be ready, else `server.io` is undefined
server.io.on("connection", (socket) => {
// ...
});
app.addHook('preClose', done => {
io.local.disconnectSockets(true);
done();
});

server.listen({ port: 3000 });
app.addHook('onClose', (_instance, done) => {
io.close(done);
});

fastify.listen({ port: 3000 });
```

</TabItem>
</Tabs>

More information [here](https://fastify.dev/).

### With µWebSockets.js {#with-uwebsocketsjs}

```js
Expand Down