8.3.0

Bug Fixes

• sharded: allow to target a specific socket ID in dynamic mode (#525) (cca38dc)
• sharded: fix count in fetchSockets() method (#523) (bd32763)
• sharded: fix SSUBSCRIBE memory leak with ioredis (#529) (2113e8d)

Features

• sharded: add an option for dynamic private channels (#526) (50220f4)

Links

• Diff: 8.2.1...8.3.0

8.2.1

Bug Fixes

• sharded: ensure compatibility with ioredis (42c8ab6)
• sharded: properly unsubscribe when closing (2da8d9e)

Diff: 8.2.0...8.2.1

8.2.0

Bug Fixes

• cleanup error handler to prevent memory leak (#490) (b5da02d)

Features

Sharded Pub/Sub

Sharded Pub/Sub was introduced in Redis 7.0 in order to help scaling the usage of Pub/Sub in cluster mode.

Reference: https://redis.io/docs/manual/pubsub/#sharded-pubsub

A dedicated adapter can be created with the createShardedAdapter() method:

import { Server } from 'socket.io';
import { createClient } from 'redis';
import { createShardedAdapter } from '@socket.io/redis-adapter';

const pubClient = createClient({ host: 'localhost', port: 6379 });
const subClient = pubClient.duplicate();

await Promise.all([
  pubClient.connect(),
  subClient.connect()
]);

const io = new Server({
  adapter: createShardedAdapter(pubClient, subClient)
});

io.listen(3000);

Minimum requirements:

• Redis 7.0
• redis@4.6.0

Added in e70b1bd.

Support for node-redis cluster

The redis package now supports Redis cluster.

Added in 77ef42c.

Subscription modes

The subscriptionMode option allows to configure how many Redis Pub/Sub channels are used:

• "static": 2 channels per namespace

Useful when used with dynamic namespaces.

• "dynamic": (2 + 1 per public room) channels per namespace

The default value, useful when some rooms have a low number of clients (so only a few Socket.IO servers are notified).

const io = new Server({
  adapter: createShardedAdapter(pubClient, subClient, {
    subscriptionMode: "static"
  })
});

Added in d3388bf.

Credits

Huge thanks to @winchell for helping!

Diff: 8.1.0...8.2.0

8.1.0

The socket.io-adapter package was added to the list of peerDependencies, in order to fix sync issues with the version imported by the socket.io package (see f07ff7b).

Features

Automatic removal of empty child namespaces

The close() method was implemented, in order to be used with the new cleanupEmptyChildNamespaces option.

Reference: https://github.com/socketio/socket.io/releases/tag/4.6.0

Added in fe89f7e.

Diff: 8.0.1...8.1.0

8.0.1

This release pins the socket.io-adapter package to version ~2.4.0 instead of ^2.4.0.

Diff: 8.0.0...8.0.1

8.0.0

Dependencies

• bump notepack.io to version ~3.0.1 (#464) (c96b2e7)

Features

• add option to allow usage of custom parser (#471) (73f6320)

Example with msgpackr:

import { unpack, pack } from "msgpackr";

io.adapter(createAdapter(pubClient, subClient, {
  parser: {
    encode(val) {
      return pack(val);
    },
    decode(val) {
      return unpack(val);
    }
  }
}));

• remove deprecated methods (fb760d9)

BREAKING CHANGES

• the remoteJoin(), remoteLeave(), remoteDisconnect() and sockets() methods are removed in favor of the official alternatives

Related: socketio/socket.io@b25495c

• the format of Date objects is modified in a non backward-compatible way, as notepack.io now implements the MessagePack Timestamp extension type.

Reference: https://github.com/msgpack/msgpack/blob/master/spec.md#timestamp-extension-type

Previous versions of the adapter will not be able to parse the Date objects sent by newer versions.

• Reference: https://github.com/darrachequesne/notepack/releases/tag/3.0.0
• Diff: darrachequesne/notepack@2.3.0...3.0.1

Diff: 7.2.0...8.0.0

7.2.0

Bug Fixes

• add support for ioredis v5 (#453) (d2faa8a)

Features

• broadcast and expect multiple acks (e4c40cc)

This feature was added in socket.io@4.5.0:

io.timeout(1000).emit("some-event", (err, responses) => {
  // ...
});

Thanks to this change, it will now work with multiple Socket.IO servers.

Diff: 7.1.0...7.2.0

7.1.0

Features

• add support for redis v4 (aa681b3)
• do not emit "error" events anymore (8e5c84f)

Error handling can now be done on the redis clients directly.

Before:

io.of("/").adapter.on("error", () => {
  // ...
});

After:

pubClient.on("error", () => {
  // something went wrong
});

subClient.on("error", () => {
  // something went wrong
});

• send response to the requesting node only (f66de11)

A more performant way to do request-response is available behind an option, publishOnSpecificResponseChannel:

const io = require('socket.io')(3000);
const { createClient } = require('redis');
const redisAdapter = require('@socket.io/redis-adapter');

const pubClient = createClient({ host: 'localhost', port: 6379 });
const subClient = pubClient.duplicate();
io.adapter(redisAdapter(pubClient, subClient, {
  publishOnSpecificResponseChannel: true
}));

To upgrade an existing deployment, you will need to upgrade all nodes to the latest version with publishOnSpecificResponseChannel = false, and then toggle the option on each node.

Please check the commit for more information.

Links

• Diff: 7.0.1...7.1.0

7.0.1

Bug Fixes

• allow numeric rooms (214b5d1)
• ignore sessionStore in the fetchSockets method (c5dce43)

Links

• Diff: 7.0.0...7.0.1

7.0.0

⚠️ IMPORTANT ⚠️

The package was renamed to @socket.io/redis-adapter, in order to match the name of the Redis emitter (@socket.io/redis-emitter).

Features

• implement the serverSideEmit functionality (3a0f29f)
• remove direct redis dependency (c68a47c)
• rename the package to @socket.io/redis-adapter (3cac178)

BREAKING CHANGES

• the library will no longer create Redis clients on behalf of the user.

Before:

io.adapter(redisAdapter({ host: "localhost", port: 6379 }));

After:

const pubClient = createClient({ host: "localhost", port: 6379 });
const subClient = pubClient.duplicate();

io.adapter(redisAdapter(pubClient, subClient));

Links

• Diff: 6.1.0...7.0.0