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chore(deps): update dependency socket.io to v4 #101

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This PR contains the following updates:

Package Type Update Change
socket.io (source) devDependencies major ^1.4.8 -> ^4.6.2

By merging this PR, the below issues will be automatically resolved and closed:

Severity CVSS Score CVE GitHub Issue
Critical 10.0 CVE-2022-2421 #95
Critical 9.4 CVE-2021-31597 #46
High 8.1 CVE-2020-28502 #50
High 8.1 WS-2020-0443 #59
High 7.5 CVE-2020-36048 #52
High 7.5 CVE-2020-36049 #53
High 7.5 WS-2017-0421 #112
High 7.3 CVE-2024-38355 #100
High 7.1 CVE-2022-41940 #75

Release Notes

socketio/socket.io (socket.io)

v4.6.2

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Bug Fixes
Links

v4.6.1

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Bug Fixes
  • properly handle manually created dynamic namespaces (0d0a7a2)
  • types: fix nodenext module resolution compatibility (#​4625) (d0b22c6)
Links

v4.6.0

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Bug Fixes
  • add timeout method to remote socket (#​4558) (0c0eb00)
  • typings: properly type emits with timeout (f3ada7d)
Features
Promise-based acknowledgements

This commit adds some syntactic sugar around acknowledgements:

  • emitWithAck()
try {
  const responses = await io.timeout(1000).emitWithAck("some-event");
  console.log(responses); // one response per client
} catch (e) {
  // some clients did not acknowledge the event in the given delay
}

io.on("connection", async (socket) => {
    // without timeout
  const response = await socket.emitWithAck("hello", "world");

  // with a specific timeout
  try {
    const response = await socket.timeout(1000).emitWithAck("hello", "world");
  } catch (err) {
    // the client did not acknowledge the event in the given delay
  }
});
  • serverSideEmitWithAck()
try {
  const responses = await io.timeout(1000).serverSideEmitWithAck("some-event");
  console.log(responses); // one response per server (except itself)
} catch (e) {
  // some servers did not acknowledge the event in the given delay
}

Added in 184f3cf.

Connection state recovery

This feature allows a client to reconnect after a temporary disconnection and restore its state:

  • id
  • rooms
  • data
  • missed packets

Usage:

import { Server } from "socket.io";

const io = new Server({
  connectionStateRecovery: {
    // default values
    maxDisconnectionDuration: 2 * 60 * 1000,
    skipMiddlewares: true,
  },
});

io.on("connection", (socket) => {
  console.log(socket.recovered); // whether the state was recovered or not
});

Here's how it works:

  • the server sends a session ID during the handshake (which is different from the current id attribute, which is public and can be freely shared)
  • the server also includes an offset in each packet (added at the end of the data array, for backward compatibility)
  • upon temporary disconnection, the server stores the client state for a given delay (implemented at the adapter level)
  • upon reconnection, the client sends both the session ID and the last offset it has processed, and the server tries to restore the state

The in-memory adapter already supports this feature, and we will soon update the Postgres and MongoDB adapters. We will also create a new adapter based on Redis Streams, which will support this feature.

Added in 54d5ee0.

Compatibility (for real) with Express middlewares

This feature implements middlewares at the Engine.IO level, because Socket.IO middlewares are meant for namespace authorization and are not executed during a classic HTTP request/response cycle.

Syntax:

io.engine.use((req, res, next) => {
  // do something

  next();
});

// with express-session
import session from "express-session";

io.engine.use(session({
  secret: "keyboard cat",
  resave: false,
  saveUninitialized: true,
  cookie: { secure: true }
}));

// with helmet
import helmet from "helmet";

io.engine.use(helmet());

A workaround was possible by using the allowRequest option and the "headers" event, but this feels way cleaner and works with upgrade requests too.

Added in 24786e7.

Error details in the disconnecting and disconnect events

The disconnect event will now contain additional details about the disconnection reason.

io.on("connection", (socket) => {
  socket.on("disconnect", (reason, description) => {
    console.log(description);
  });
});

Added in 8aa9499.

Automatic removal of empty child namespaces

This commit adds a new option, "cleanupEmptyChildNamespaces". With this option enabled (disabled by default), when a socket disconnects from a dynamic namespace and if there are no other sockets connected to it then the namespace will be cleaned up and its adapter will be closed.

import { createServer } from "node:http";
import { Server } from "socket.io";

const httpServer = createServer();
const io = new Server(httpServer, {
  cleanupEmptyChildNamespaces: true
});

Added in 5d9220b.

A new "addTrailingSlash" option

The trailing slash which was added by default can now be disabled:

import { createServer } from "node:http";
import { Server } from "socket.io";

const httpServer = createServer();
const io = new Server(httpServer, {
  addTrailingSlash: false
});

In the example above, the clients can omit the trailing slash and use /socket.io instead of /socket.io/.

Added in d0fd474.

Performance Improvements
  • precompute the WebSocket frames when broadcasting (da2b542)
Links:

v4.5.4

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This release contains a bump of:

Links:

v4.5.3

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Bug Fixes
  • typings: accept an HTTP2 server in the constructor (d3d0a2d)
  • typings: apply types to "io.timeout(...).emit()" calls (e357daf)
Links:

v4.5.2

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Bug Fixes
  • prevent the socket from joining a room after disconnection (18f3fda)
  • uws: prevent the server from crashing after upgrade (ba497ee)
Links:

v4.5.1

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Bug Fixes
  • forward the local flag to the adapter when using fetchSockets() (30430f0)
  • typings: add HTTPS server to accepted types (#​4351) (9b43c91)
Links:

v4.5.0

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Bug Fixes
Features
  • add support for catch-all listeners for outgoing packets (531104d)

This is similar to onAny(), but for outgoing packets.

Syntax:

socket.onAnyOutgoing((event, ...args) => {
  console.log(event);
});
  • broadcast and expect multiple acks (8b20457)

Syntax:

io.timeout(1000).emit("some-event", (err, responses) => {
  // ...
});
  • add the "maxPayload" field in the handshake details (088dcb4)

So that clients in HTTP long-polling can decide how many packets they have to send to stay under the maxHttpBufferSize
value.

This is a backward compatible change which should not mandate a new major revision of the protocol (we stay in v4), as
we only add a field in the JSON-encoded handshake data:

0{"sid":"lv_VI97HAXpY6yYWAAAC","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":5000,"maxPayload":1000000}
Links:

v4.4.1

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Bug Fixes
Links:

v4.4.0

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Bug Fixes
  • only set 'connected' to true after middleware execution (02b0f73)
Features
  • add an implementation based on uWebSockets.js (c0d8c5a)
const { App } = require("uWebSockets.js");
const { Server } = require("socket.io");

const app = new App();
const io = new Server();

io.attachApp(app);

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

app.listen(3000, (token) => {
  if (!token) {
    console.warn("port already in use");
  }
});
socket.timeout(5000).emit("my-event", (err) => {
  if (err) {
    // the client did not acknowledge the event in the given delay
  }
});
interface SocketData {
  name: string;
  age: number;
}

const io = new Server<ClientToServerEvents, ServerToClientEvents, InterServerEvents, SocketData>();

io.on("connection", (socket) => {
  socket.data.name = "john";
  socket.data.age = 42;
});
Links:

v4.3.2

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Bug Fixes
Links:

v4.3.1

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Bug Fixes
Links:

v4.3.0

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For this release, most of the work was done on the client side, see here.

Bug Fixes
  • typings: add name field to cookie option (#​4099) (033c5d3)
  • send volatile packets with binary attachments (dc81fcf)
Features
Links:

v4.2.0

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Bug Fixes
  • typings: allow async listener in typed events (ccfd8ca)
Features
  • ignore the query string when serving client JavaScript (#​4024) (24fee27)
Links:

v4.1.3

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Bug Fixes
  • fix io.except() method (94e27cd)
  • remove x-sourcemap header (a4dffc6)
Links:

v4.1.2

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Bug Fixes
  • typings: ensure compatibility with TypeScript 3.x (0cb6ac9)
  • ensure compatibility with previous versions of the adapter (a2cf248)
Links:

v4.1.1

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Bug Fixes
  • typings: properly type server-side events (b84ed1e)
  • typings: properly type the adapter attribute (891b187)
Links:

v4.1.0

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Blog post: https://socket.io/blog/socket-io-4-1-0/

Features
  • add support for inter-server communication (93cce05)
  • notify upon namespace creation (499c892)
  • add a "connection_error" event (7096e98, from engine.io)
  • add the "initial_headers" and "headers" events (2527543, from engine.io)
Links:

v4.0.2

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Bug Fixes
  • typings: make "engine" attribute public (b81ce4c)
  • properly export the Socket class (d65b6ee)
Links:

v4.0.1

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Bug Fixes
Links:

v4.0.0

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Blog post: https://socket.io/blog/socket-io-4-release/
Migration guide: https://socket.io/docs/v3/migrating-from-3-x-to-4-0/

Bug Fixes
  • make io.to(...) immutable (ac9e8ca)
Features
BREAKING CHANGES
  • io.to(...) now returns an immutable operator

Previously, broadcasting to a given room (by calling io.to()) would mutate the io instance, which could lead to surprising behaviors, like:

io.to("room1");
io.to("room2").emit(/* ... */); // also sent to room1

// or with async/await
io.to("room3").emit("details", await fetchDetails()); // random behavior: maybe in room3, maybe to all clients

Calling io.to() (or any other broadcast modifier) will now return an immutable instance.

Links:

v3.1.2

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Bug Fixes
  • ignore packets received after disconnection (494c64e)
Links:

v3.1.1

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Bug Fixes
  • properly parse the CONNECT packet in v2 compatibility mode (6f4bd7f)
  • typings: add return types and general-case overload signatures (#​3776) (9e8f288)
  • typings: update the types of "query", "auth" and "headers" (4f2e9a7)
Links:

v3.1.0

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In order to ease the migration to Socket.IO v3, the v3 server is now able to communicate with v2 clients:

const io = require("socket.io")({
  allowEIO3: true // false by default
});

Note: the allowEIO3 refers to the version 3 of the Engine.IO protocol which is used in Socket.IO v2

Features
Bug Fixes
  • allow integers as event names (1c220dd)
Links:

v3.0.5

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Bug Fixes
  • properly clear timeout on connection failure (170b739)
Reverts
  • restore the socket middleware functionality (bf54327)
Links:

v3.0.4

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Links:

v3.0.3

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Links:

v3.0.2

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Bug Fixes
  • merge Engine.IO options (43705d7)
Links:

v3.0.1

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Bug Fixes
  • export ServerOptions and Namespace types (#​3684) (f62f180)
  • typings: update the signature of the emit method (50671d9)
Links:

v3.0.0

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More details about this release in the blog post: https://socket.io/blog/socket-io-3-release/

Dedicated migration guide: https://socket.io/docs/migrating-from-2-x-to-3-0/

Bug Fixes
  • close clients with no namespace (91cd255)
Features
  • emit an Error object upon middleware error (54bf4a4)
  • serve msgpack bundle (aa7574f)
  • add support for catch-all listeners (5c73733)
  • make Socket#join() and Socket#leave() synchronous (129c641)
  • remove prod dependency to socket.io-client (7603da7)
  • move binary detection back to the parser (669592d)
  • add ES6 module export (8b6b100)
  • do not reuse the Engine.IO id (2875d2c)
  • remove Server#set() method (029f478)
  • remove Socket#rooms object (1507b41)
  • remove the 'origins' option (a8c0600)
  • remove the implicit connection to the default namespace (3289f7e)
  • throw upon reserved event names (4bd5b23)
BREAKING CHANGES

  • the Socket#use() method is removed (see 5c73733)

  • Socket#join() and Socket#leave() do not accept a callback argument anymore.

Before:

socket.join("room1", () => {
 io.to("room1").emit("hello");
});

After:

socket.join("room1");
io.to("room1").emit("hello");
// or await socket.join("room1"); for custom adapters
  • the "connected" map is renamed to "sockets"
  • the Socket#binary() method is removed, as this use case is now covered by the ability to provide your own parser.
  • the 'origins' option is removed

Before:

new Server(3000, {
  origins: ["https://example.com"]
});

The 'origins' option was used in the allowRequest method, in order to
determine whether the request should pass or not. And the Engine.IO
server would implicitly add the necessary Access-Control-Allow-xxx
headers.

After:

new Server(3000, {
  cors: {
    origin: "https://example.com",
    methods: ["GET", "POST"],
    allowedHeaders: ["content-type"]
  }
});

The already existing 'allowRequest' option can be used for validation:

new Server(3000, {
  allowRequest: (req, callback) => {
    callback(null, req.headers.referer.startsWith("https://example.com"));
  }
});

  • Socket#rooms is now a Set instead of an object

  • Namespace#connected is now a Map instead of an object

  • there is no more implicit connection to the default namespace:

// client-side
const socket = io("/admin");

// server-side
io.on("connect", socket => {
  // not triggered anymore
})

io.use((socket, next) => {
  // not triggered anymore
});

io.of("/admin").use((socket, next) => {
  // triggered
});
  • the Server#set() method was removed

This method was kept for backward-compatibility with pre-1.0 versions.

Links:

v2.5.1

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Bug Fixes
  • add a noop handler for the error event (d30630b)
Links:

v2.5.0

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⚠️ WARNING ⚠️

The default value of the maxHttpBufferSize option has been decreased from 100 MB to 1 MB, in order to prevent attacks by denial of service.

Security advisory: GHSA-j4f2-536g-r55m

Bug Fixes
  • fix race condition in dynamic namespaces (05e1278)
  • ignore packet received after disconnection (22d4bdf)
  • only set 'connected' to true after middleware execution (226cc16)
  • prevent the socket from joining a room after disconnection (f223178)
Links:

v2.4.1

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This release reverts the breaking change introduced in 2.4.0 (socketio/socket.io@f78a575).

If you are using Socket.IO v2, you should explicitly allow/disallow cross-origin requests:

  • without CORS (server and client are served from the same domain):
const io = require("socket.io")(httpServer, {
  allowRequest: (req, callback) => {
    callback(null, req.headers.origin === undefined); // cross-origin requests will not be allowed
  }
});
  • with CORS (server and client are served from distinct domains):
io.origins(["http://localhost:3000"]); // for local development
io.origins(["https://example.com"]);

In any case, please consider upgrading to Socket.IO v3, where this security issue is now fixed (CORS is disabled by default).

Reverts
  • fix(security): do not allow all origins by default (a169050)
Links:

v2.4.0

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Related blog post: https://socket.io/blog/socket-io-2-4-0/

Features (from Engine.IO)
  • add support for all cookie options (19cc582)
  • disable perMessageDeflate by default (5ad2736)
Bug Fixes
  • security: do not allow all origins by default (f78a575)
  • properly overwrite the query sent in the handshake (d33a619)

⚠️ BREAKING CHANGE ⚠️

Previously, CORS was enabled by default, which meant that a Socket.IO server sent the necessary CORS headers (Access-Control-Allow-xxx) to any domain. This will not be the case anymore, and you now have to explicitly enable it.

Please note that you are not impacted if:

  • you are using Socket.IO v2 and the origins option to restrict the list of allowed domains
  • you are using Socket.IO v3 (disabled by default)

This commit also removes the support for '*' matchers and protocol-less URL:

io.origins('https://example.com:443'); => io.origins(['https://example.com']);
io.origins('localhost:3000');          => io.origins(['http://localhost:3000']);
io.origins('http://localhost:*');      => io.origins(['http://localhost:3000']);
io.origins('*:3000');                  => io.origins(['http://localhost:3000']);

To restore the previous behavior (please use with caution):

io.origins((_, callback) => {
  callback(null, true);
});

See also:

Thanks a lot to @​ni8walk3r for the security report.

Links:

v2.3.0

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This release mainly contains a bump of the engine.io and ws packages, but no additional features.

Links:

v2.2.0

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Features

  • add cache-control header when serving the client source (#​2907)

Bug fixes

  • throw an error when trying to access the clients of a dynamic namespace (#​3355)
Links

v2.1.1

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Features

socket.local.to('room101').emit(/* */);

Bug fixes

(client) fire an error event on middleware failure for non-root namespace (https://github.com/socketio/socket.io-client/pull/1202)

Links:

v2.1.0

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Features

// by default, the object is recursively scanned to check whether it contains some binary data
// in the following example, the check is skipped in order to improve performance
socket.binary(false).emit('plain-object', object);

// it also works at the namespace level
io.binary(false).emit('plain-object', object);
  • add support for dynamic namespaces (#​3195)
io.of(/^\/dynamic-\d+$/).on('connect', (socket) => {
  // socket.nsp.name = '/dynamic-101'
});

// client-side
const client = require('socket.io-client')('/dynamic-101');

Bug fixes

  • properly emit 'connect' when using a custom namespace (#​3197)
  • include the protocol in the origins check (#​3198)

Important note ⚠️ from Engine.IO 3.2.0 release

There are two non-breaking changes that are somehow quite important:

var engine = require('engine.io');
var server = engine.listen(3000, {
  wsEngine: 'uws'
});
Links:

v2.0.4

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Bug fixes

  • do not throw when receiving an unhandled error packet (#​3038)
  • reset rooms object before broadcasting from namespace (#​3039)
Links:

v2.0.3

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Bug fixes

  • reset rooms object before broadcasting (#​2970)
  • fix middleware initialization (#​2969)
Links:

v2.0.2

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Bug fixes

  • fix timing issues with middleware (#​2948)
Links:

v2.0.1

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Bug fixes

- update path of client file (#​2934)

Links:

v2.0.0

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This major release brings several performance improvements:

  • uws is now the default Websocket engine. It should bring significant improvement in performance (particularly in terms of memory consumption) (https://github.com/socketio/engine.io/releases/tag/2.0.0)

  • the Engine.IO and Socket.IO handshake packets were merged, reducing the number of roundtrips necessary to establish a connection. (#​2833)

  • it is now possible to provide a custom parser according to the needs of your application (#​2829). Please take a look at the example for more information.

Please note that this release is not backward-compatible, due to:

Please also note that if you are using a self-signed certificate, rejectUnauthorized now defaults to true (https://github.com/socketio/engine.io-client/pull/558).

Finally, the API documentation is now in the repository (here), and the content of the website here. Do not hesitate if you see something wrong or missing!

The full list of changes:

@mend-for-github-com mend-for-github-com bot added the security fix Security fix generated by WhiteSource label Jun 23, 2024
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