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WebSocket Audio Stream

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+ + + diff --git a/node_modules/.yarn-integrity b/node_modules/.yarn-integrity new file mode 100644 index 0000000..dcbaa05 --- /dev/null +++ b/node_modules/.yarn-integrity @@ -0,0 +1,16 @@ +{ + "systemParams": "darwin-arm64-93", + "modulesFolders": [ + "node_modules" + ], + "flags": [], + "linkedModules": [], + "topLevelPatterns": [ + "ws@^8.18.0" + ], + "lockfileEntries": { + "ws@^8.18.0": "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz#0d7505a6eafe2b0e712d232b42279f53bc289bbc" + }, + "files": [], + "artifacts": {} +} \ No newline at end of file diff --git a/node_modules/ws/LICENSE b/node_modules/ws/LICENSE new file mode 100644 index 0000000..1da5b96 --- /dev/null +++ b/node_modules/ws/LICENSE @@ -0,0 +1,20 @@ +Copyright (c) 2011 Einar Otto Stangvik +Copyright (c) 2013 Arnout Kazemier and contributors +Copyright (c) 2016 Luigi Pinca and contributors + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/node_modules/ws/README.md b/node_modules/ws/README.md new file mode 100644 index 0000000..21f10df --- /dev/null +++ b/node_modules/ws/README.md @@ -0,0 +1,548 @@ +# ws: a Node.js WebSocket library + +[![Version npm](https://img.shields.io/npm/v/ws.svg?logo=npm)](https://www.npmjs.com/package/ws) +[![CI](https://img.shields.io/github/actions/workflow/status/websockets/ws/ci.yml?branch=master&label=CI&logo=github)](https://github.com/websockets/ws/actions?query=workflow%3ACI+branch%3Amaster) +[![Coverage Status](https://img.shields.io/coveralls/websockets/ws/master.svg?logo=coveralls)](https://coveralls.io/github/websockets/ws) + +ws is a simple to use, blazing fast, and thoroughly tested WebSocket client and +server implementation. + +Passes the quite extensive Autobahn test suite: [server][server-report], +[client][client-report]. + +**Note**: This module does not work in the browser. The client in the docs is a +reference to a backend with the role of a client in the WebSocket communication. +Browser clients must use the native +[`WebSocket`](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket) +object. To make the same code work seamlessly on Node.js and the browser, you +can use one of the many wrappers available on npm, like +[isomorphic-ws](https://github.com/heineiuo/isomorphic-ws). + +## Table of Contents + +- [Protocol support](#protocol-support) +- [Installing](#installing) + - [Opt-in for performance](#opt-in-for-performance) + - [Legacy opt-in for performance](#legacy-opt-in-for-performance) +- [API docs](#api-docs) +- [WebSocket compression](#websocket-compression) +- [Usage examples](#usage-examples) + - [Sending and receiving text data](#sending-and-receiving-text-data) + - [Sending binary data](#sending-binary-data) + - [Simple server](#simple-server) + - [External HTTP/S server](#external-https-server) + - [Multiple servers sharing a single HTTP/S server](#multiple-servers-sharing-a-single-https-server) + - [Client authentication](#client-authentication) + - [Server broadcast](#server-broadcast) + - [Round-trip time](#round-trip-time) + - [Use the Node.js streams API](#use-the-nodejs-streams-api) + - [Other examples](#other-examples) +- [FAQ](#faq) + - [How to get the IP address of the client?](#how-to-get-the-ip-address-of-the-client) + - [How to detect and close broken connections?](#how-to-detect-and-close-broken-connections) + - [How to connect via a proxy?](#how-to-connect-via-a-proxy) +- [Changelog](#changelog) +- [License](#license) + +## Protocol support + +- **HyBi drafts 07-12** (Use the option `protocolVersion: 8`) +- **HyBi drafts 13-17** (Current default, alternatively option + `protocolVersion: 13`) + +## Installing + +``` +npm install ws +``` + +### Opt-in for performance + +[bufferutil][] is an optional module that can be installed alongside the ws +module: + +``` +npm install --save-optional bufferutil +``` + +This is a binary addon that improves the performance of certain operations such +as masking and unmasking the data payload of the WebSocket frames. Prebuilt +binaries are available for the most popular platforms, so you don't necessarily +need to have a C++ compiler installed on your machine. + +To force ws to not use bufferutil, use the +[`WS_NO_BUFFER_UTIL`](./doc/ws.md#ws_no_buffer_util) environment variable. This +can be useful to enhance security in systems where a user can put a package in +the package search path of an application of another user, due to how the +Node.js resolver algorithm works. + +#### Legacy opt-in for performance + +If you are running on an old version of Node.js (prior to v18.14.0), ws also +supports the [utf-8-validate][] module: + +``` +npm install --save-optional utf-8-validate +``` + +This contains a binary polyfill for [`buffer.isUtf8()`][]. + +To force ws not to use utf-8-validate, use the +[`WS_NO_UTF_8_VALIDATE`](./doc/ws.md#ws_no_utf_8_validate) environment variable. + +## API docs + +See [`/doc/ws.md`](./doc/ws.md) for Node.js-like documentation of ws classes and +utility functions. + +## WebSocket compression + +ws supports the [permessage-deflate extension][permessage-deflate] which enables +the client and server to negotiate a compression algorithm and its parameters, +and then selectively apply it to the data payloads of each WebSocket message. + +The extension is disabled by default on the server and enabled by default on the +client. It adds a significant overhead in terms of performance and memory +consumption so we suggest to enable it only if it is really needed. + +Note that Node.js has a variety of issues with high-performance compression, +where increased concurrency, especially on Linux, can lead to [catastrophic +memory fragmentation][node-zlib-bug] and slow performance. If you intend to use +permessage-deflate in production, it is worthwhile to set up a test +representative of your workload and ensure Node.js/zlib will handle it with +acceptable performance and memory usage. + +Tuning of permessage-deflate can be done via the options defined below. You can +also use `zlibDeflateOptions` and `zlibInflateOptions`, which is passed directly +into the creation of [raw deflate/inflate streams][node-zlib-deflaterawdocs]. + +See [the docs][ws-server-options] for more options. + +```js +import WebSocket, { WebSocketServer } from 'ws'; + +const wss = new WebSocketServer({ + port: 8080, + perMessageDeflate: { + zlibDeflateOptions: { + // See zlib defaults. + chunkSize: 1024, + memLevel: 7, + level: 3 + }, + zlibInflateOptions: { + chunkSize: 10 * 1024 + }, + // Other options settable: + clientNoContextTakeover: true, // Defaults to negotiated value. + serverNoContextTakeover: true, // Defaults to negotiated value. + serverMaxWindowBits: 10, // Defaults to negotiated value. + // Below options specified as default values. + concurrencyLimit: 10, // Limits zlib concurrency for perf. + threshold: 1024 // Size (in bytes) below which messages + // should not be compressed if context takeover is disabled. + } +}); +``` + +The client will only use the extension if it is supported and enabled on the +server. To always disable the extension on the client, set the +`perMessageDeflate` option to `false`. + +```js +import WebSocket from 'ws'; + +const ws = new WebSocket('ws://www.host.com/path', { + perMessageDeflate: false +}); +``` + +## Usage examples + +### Sending and receiving text data + +```js +import WebSocket from 'ws'; + +const ws = new WebSocket('ws://www.host.com/path'); + +ws.on('error', console.error); + +ws.on('open', function open() { + ws.send('something'); +}); + +ws.on('message', function message(data) { + console.log('received: %s', data); +}); +``` + +### Sending binary data + +```js +import WebSocket from 'ws'; + +const ws = new WebSocket('ws://www.host.com/path'); + +ws.on('error', console.error); + +ws.on('open', function open() { + const array = new Float32Array(5); + + for (var i = 0; i < array.length; ++i) { + array[i] = i / 2; + } + + ws.send(array); +}); +``` + +### Simple server + +```js +import { WebSocketServer } from 'ws'; + +const wss = new WebSocketServer({ port: 8080 }); + +wss.on('connection', function connection(ws) { + ws.on('error', console.error); + + ws.on('message', function message(data) { + console.log('received: %s', data); + }); + + ws.send('something'); +}); +``` + +### External HTTP/S server + +```js +import { createServer } from 'https'; +import { readFileSync } from 'fs'; +import { WebSocketServer } from 'ws'; + +const server = createServer({ + cert: readFileSync('/path/to/cert.pem'), + key: readFileSync('/path/to/key.pem') +}); +const wss = new WebSocketServer({ server }); + +wss.on('connection', function connection(ws) { + ws.on('error', console.error); + + ws.on('message', function message(data) { + console.log('received: %s', data); + }); + + ws.send('something'); +}); + +server.listen(8080); +``` + +### Multiple servers sharing a single HTTP/S server + +```js +import { createServer } from 'http'; +import { WebSocketServer } from 'ws'; + +const server = createServer(); +const wss1 = new WebSocketServer({ noServer: true }); +const wss2 = new WebSocketServer({ noServer: true }); + +wss1.on('connection', function connection(ws) { + ws.on('error', console.error); + + // ... +}); + +wss2.on('connection', function connection(ws) { + ws.on('error', console.error); + + // ... +}); + +server.on('upgrade', function upgrade(request, socket, head) { + const { pathname } = new URL(request.url, 'wss://base.url'); + + if (pathname === '/foo') { + wss1.handleUpgrade(request, socket, head, function done(ws) { + wss1.emit('connection', ws, request); + }); + } else if (pathname === '/bar') { + wss2.handleUpgrade(request, socket, head, function done(ws) { + wss2.emit('connection', ws, request); + }); + } else { + socket.destroy(); + } +}); + +server.listen(8080); +``` + +### Client authentication + +```js +import { createServer } from 'http'; +import { WebSocketServer } from 'ws'; + +function onSocketError(err) { + console.error(err); +} + +const server = createServer(); +const wss = new WebSocketServer({ noServer: true }); + +wss.on('connection', function connection(ws, request, client) { + ws.on('error', console.error); + + ws.on('message', function message(data) { + console.log(`Received message ${data} from user ${client}`); + }); +}); + +server.on('upgrade', function upgrade(request, socket, head) { + socket.on('error', onSocketError); + + // This function is not defined on purpose. Implement it with your own logic. + authenticate(request, function next(err, client) { + if (err || !client) { + socket.write('HTTP/1.1 401 Unauthorized\r\n\r\n'); + socket.destroy(); + return; + } + + socket.removeListener('error', onSocketError); + + wss.handleUpgrade(request, socket, head, function done(ws) { + wss.emit('connection', ws, request, client); + }); + }); +}); + +server.listen(8080); +``` + +Also see the provided [example][session-parse-example] using `express-session`. + +### Server broadcast + +A client WebSocket broadcasting to all connected WebSocket clients, including +itself. + +```js +import WebSocket, { WebSocketServer } from 'ws'; + +const wss = new WebSocketServer({ port: 8080 }); + +wss.on('connection', function connection(ws) { + ws.on('error', console.error); + + ws.on('message', function message(data, isBinary) { + wss.clients.forEach(function each(client) { + if (client.readyState === WebSocket.OPEN) { + client.send(data, { binary: isBinary }); + } + }); + }); +}); +``` + +A client WebSocket broadcasting to every other connected WebSocket clients, +excluding itself. + +```js +import WebSocket, { WebSocketServer } from 'ws'; + +const wss = new WebSocketServer({ port: 8080 }); + +wss.on('connection', function connection(ws) { + ws.on('error', console.error); + + ws.on('message', function message(data, isBinary) { + wss.clients.forEach(function each(client) { + if (client !== ws && client.readyState === WebSocket.OPEN) { + client.send(data, { binary: isBinary }); + } + }); + }); +}); +``` + +### Round-trip time + +```js +import WebSocket from 'ws'; + +const ws = new WebSocket('wss://websocket-echo.com/'); + +ws.on('error', console.error); + +ws.on('open', function open() { + console.log('connected'); + ws.send(Date.now()); +}); + +ws.on('close', function close() { + console.log('disconnected'); +}); + +ws.on('message', function message(data) { + console.log(`Round-trip time: ${Date.now() - data} ms`); + + setTimeout(function timeout() { + ws.send(Date.now()); + }, 500); +}); +``` + +### Use the Node.js streams API + +```js +import WebSocket, { createWebSocketStream } from 'ws'; + +const ws = new WebSocket('wss://websocket-echo.com/'); + +const duplex = createWebSocketStream(ws, { encoding: 'utf8' }); + +duplex.on('error', console.error); + +duplex.pipe(process.stdout); +process.stdin.pipe(duplex); +``` + +### Other examples + +For a full example with a browser client communicating with a ws server, see the +examples folder. + +Otherwise, see the test cases. + +## FAQ + +### How to get the IP address of the client? + +The remote IP address can be obtained from the raw socket. + +```js +import { WebSocketServer } from 'ws'; + +const wss = new WebSocketServer({ port: 8080 }); + +wss.on('connection', function connection(ws, req) { + const ip = req.socket.remoteAddress; + + ws.on('error', console.error); +}); +``` + +When the server runs behind a proxy like NGINX, the de-facto standard is to use +the `X-Forwarded-For` header. + +```js +wss.on('connection', function connection(ws, req) { + const ip = req.headers['x-forwarded-for'].split(',')[0].trim(); + + ws.on('error', console.error); +}); +``` + +### How to detect and close broken connections? + +Sometimes, the link between the server and the client can be interrupted in a +way that keeps both the server and the client unaware of the broken state of the +connection (e.g. when pulling the cord). + +In these cases, ping messages can be used as a means to verify that the remote +endpoint is still responsive. + +```js +import { WebSocketServer } from 'ws'; + +function heartbeat() { + this.isAlive = true; +} + +const wss = new WebSocketServer({ port: 8080 }); + +wss.on('connection', function connection(ws) { + ws.isAlive = true; + ws.on('error', console.error); + ws.on('pong', heartbeat); +}); + +const interval = setInterval(function ping() { + wss.clients.forEach(function each(ws) { + if (ws.isAlive === false) return ws.terminate(); + + ws.isAlive = false; + ws.ping(); + }); +}, 30000); + +wss.on('close', function close() { + clearInterval(interval); +}); +``` + +Pong messages are automatically sent in response to ping messages as required by +the spec. + +Just like the server example above, your clients might as well lose connection +without knowing it. You might want to add a ping listener on your clients to +prevent that. A simple implementation would be: + +```js +import WebSocket from 'ws'; + +function heartbeat() { + clearTimeout(this.pingTimeout); + + // Use `WebSocket#terminate()`, which immediately destroys the connection, + // instead of `WebSocket#close()`, which waits for the close timer. + // Delay should be equal to the interval at which your server + // sends out pings plus a conservative assumption of the latency. + this.pingTimeout = setTimeout(() => { + this.terminate(); + }, 30000 + 1000); +} + +const client = new WebSocket('wss://websocket-echo.com/'); + +client.on('error', console.error); +client.on('open', heartbeat); +client.on('ping', heartbeat); +client.on('close', function clear() { + clearTimeout(this.pingTimeout); +}); +``` + +### How to connect via a proxy? + +Use a custom `http.Agent` implementation like [https-proxy-agent][] or +[socks-proxy-agent][]. + +## Changelog + +We're using the GitHub [releases][changelog] for changelog entries. + +## License + +[MIT](LICENSE) + +[`buffer.isutf8()`]: https://nodejs.org/api/buffer.html#bufferisutf8input +[bufferutil]: https://github.com/websockets/bufferutil +[changelog]: https://github.com/websockets/ws/releases +[client-report]: http://websockets.github.io/ws/autobahn/clients/ +[https-proxy-agent]: https://github.com/TooTallNate/node-https-proxy-agent +[node-zlib-bug]: https://github.com/nodejs/node/issues/8871 +[node-zlib-deflaterawdocs]: + https://nodejs.org/api/zlib.html#zlib_zlib_createdeflateraw_options +[permessage-deflate]: https://tools.ietf.org/html/rfc7692 +[server-report]: http://websockets.github.io/ws/autobahn/servers/ +[session-parse-example]: ./examples/express-session-parse +[socks-proxy-agent]: https://github.com/TooTallNate/node-socks-proxy-agent +[utf-8-validate]: https://github.com/websockets/utf-8-validate +[ws-server-options]: ./doc/ws.md#new-websocketserveroptions-callback diff --git a/node_modules/ws/browser.js b/node_modules/ws/browser.js new file mode 100644 index 0000000..ca4f628 --- /dev/null +++ b/node_modules/ws/browser.js @@ -0,0 +1,8 @@ +'use strict'; + +module.exports = function () { + throw new Error( + 'ws does not work in the browser. Browser clients must use the native ' + + 'WebSocket object' + ); +}; diff --git a/node_modules/ws/index.js b/node_modules/ws/index.js new file mode 100644 index 0000000..41edb3b --- /dev/null +++ b/node_modules/ws/index.js @@ -0,0 +1,13 @@ +'use strict'; + +const WebSocket = require('./lib/websocket'); + +WebSocket.createWebSocketStream = require('./lib/stream'); +WebSocket.Server = require('./lib/websocket-server'); +WebSocket.Receiver = require('./lib/receiver'); +WebSocket.Sender = require('./lib/sender'); + +WebSocket.WebSocket = WebSocket; +WebSocket.WebSocketServer = WebSocket.Server; + +module.exports = WebSocket; diff --git a/node_modules/ws/lib/buffer-util.js b/node_modules/ws/lib/buffer-util.js new file mode 100644 index 0000000..f7536e2 --- /dev/null +++ b/node_modules/ws/lib/buffer-util.js @@ -0,0 +1,131 @@ +'use strict'; + +const { EMPTY_BUFFER } = require('./constants'); + +const FastBuffer = Buffer[Symbol.species]; + +/** + * Merges an array of buffers into a new buffer. + * + * @param {Buffer[]} list The array of buffers to concat + * @param {Number} totalLength The total length of buffers in the list + * @return {Buffer} The resulting buffer + * @public + */ +function concat(list, totalLength) { + if (list.length === 0) return EMPTY_BUFFER; + if (list.length === 1) return list[0]; + + const target = Buffer.allocUnsafe(totalLength); + let offset = 0; + + for (let i = 0; i < list.length; i++) { + const buf = list[i]; + target.set(buf, offset); + offset += buf.length; + } + + if (offset < totalLength) { + return new FastBuffer(target.buffer, target.byteOffset, offset); + } + + return target; +} + +/** + * Masks a buffer using the given mask. + * + * @param {Buffer} source The buffer to mask + * @param {Buffer} mask The mask to use + * @param {Buffer} output The buffer where to store the result + * @param {Number} offset The offset at which to start writing + * @param {Number} length The number of bytes to mask. + * @public + */ +function _mask(source, mask, output, offset, length) { + for (let i = 0; i < length; i++) { + output[offset + i] = source[i] ^ mask[i & 3]; + } +} + +/** + * Unmasks a buffer using the given mask. + * + * @param {Buffer} buffer The buffer to unmask + * @param {Buffer} mask The mask to use + * @public + */ +function _unmask(buffer, mask) { + for (let i = 0; i < buffer.length; i++) { + buffer[i] ^= mask[i & 3]; + } +} + +/** + * Converts a buffer to an `ArrayBuffer`. + * + * @param {Buffer} buf The buffer to convert + * @return {ArrayBuffer} Converted buffer + * @public + */ +function toArrayBuffer(buf) { + if (buf.length === buf.buffer.byteLength) { + return buf.buffer; + } + + return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.length); +} + +/** + * Converts `data` to a `Buffer`. + * + * @param {*} data The data to convert + * @return {Buffer} The buffer + * @throws {TypeError} + * @public + */ +function toBuffer(data) { + toBuffer.readOnly = true; + + if (Buffer.isBuffer(data)) return data; + + let buf; + + if (data instanceof ArrayBuffer) { + buf = new FastBuffer(data); + } else if (ArrayBuffer.isView(data)) { + buf = new FastBuffer(data.buffer, data.byteOffset, data.byteLength); + } else { + buf = Buffer.from(data); + toBuffer.readOnly = false; + } + + return buf; +} + +module.exports = { + concat, + mask: _mask, + toArrayBuffer, + toBuffer, + unmask: _unmask +}; + +/* istanbul ignore else */ +if (!process.env.WS_NO_BUFFER_UTIL) { + try { + const bufferUtil = require('bufferutil'); + + module.exports.mask = function (source, mask, output, offset, length) { + if (length < 48) _mask(source, mask, output, offset, length); + else bufferUtil.mask(source, mask, output, offset, length); + }; + + module.exports.unmask = function (buffer, mask) { + if (buffer.length < 32) _unmask(buffer, mask); + else bufferUtil.unmask(buffer, mask); + }; + } catch (e) { + // Continue regardless of the error. + } +} diff --git a/node_modules/ws/lib/constants.js b/node_modules/ws/lib/constants.js new file mode 100644 index 0000000..74214d4 --- /dev/null +++ b/node_modules/ws/lib/constants.js @@ -0,0 +1,18 @@ +'use strict'; + +const BINARY_TYPES = ['nodebuffer', 'arraybuffer', 'fragments']; +const hasBlob = typeof Blob !== 'undefined'; + +if (hasBlob) BINARY_TYPES.push('blob'); + +module.exports = { + BINARY_TYPES, + EMPTY_BUFFER: Buffer.alloc(0), + GUID: '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', + hasBlob, + kForOnEventAttribute: Symbol('kIsForOnEventAttribute'), + kListener: Symbol('kListener'), + kStatusCode: Symbol('status-code'), + kWebSocket: Symbol('websocket'), + NOOP: () => {} +}; diff --git a/node_modules/ws/lib/event-target.js b/node_modules/ws/lib/event-target.js new file mode 100644 index 0000000..fea4cbc --- /dev/null +++ b/node_modules/ws/lib/event-target.js @@ -0,0 +1,292 @@ +'use strict'; + +const { kForOnEventAttribute, kListener } = require('./constants'); + +const kCode = Symbol('kCode'); +const kData = Symbol('kData'); +const kError = Symbol('kError'); +const kMessage = Symbol('kMessage'); +const kReason = Symbol('kReason'); +const kTarget = Symbol('kTarget'); +const kType = Symbol('kType'); +const kWasClean = Symbol('kWasClean'); + +/** + * Class representing an event. + */ +class Event { + /** + * Create a new `Event`. + * + * @param {String} type The name of the event + * @throws {TypeError} If the `type` argument is not specified + */ + constructor(type) { + this[kTarget] = null; + this[kType] = type; + } + + /** + * @type {*} + */ + get target() { + return this[kTarget]; + } + + /** + * @type {String} + */ + get type() { + return this[kType]; + } +} + +Object.defineProperty(Event.prototype, 'target', { enumerable: true }); +Object.defineProperty(Event.prototype, 'type', { enumerable: true }); + +/** + * Class representing a close event. + * + * @extends Event + */ +class CloseEvent extends Event { + /** + * Create a new `CloseEvent`. + * + * @param {String} type The name of the event + * @param {Object} [options] A dictionary object that allows for setting + * attributes via object members of the same name + * @param {Number} [options.code=0] The status code explaining why the + * connection was closed + * @param {String} [options.reason=''] A human-readable string explaining why + * the connection was closed + * @param {Boolean} [options.wasClean=false] Indicates whether or not the + * connection was cleanly closed + */ + constructor(type, options = {}) { + super(type); + + this[kCode] = options.code === undefined ? 0 : options.code; + this[kReason] = options.reason === undefined ? '' : options.reason; + this[kWasClean] = options.wasClean === undefined ? false : options.wasClean; + } + + /** + * @type {Number} + */ + get code() { + return this[kCode]; + } + + /** + * @type {String} + */ + get reason() { + return this[kReason]; + } + + /** + * @type {Boolean} + */ + get wasClean() { + return this[kWasClean]; + } +} + +Object.defineProperty(CloseEvent.prototype, 'code', { enumerable: true }); +Object.defineProperty(CloseEvent.prototype, 'reason', { enumerable: true }); +Object.defineProperty(CloseEvent.prototype, 'wasClean', { enumerable: true }); + +/** + * Class representing an error event. + * + * @extends Event + */ +class ErrorEvent extends Event { + /** + * Create a new `ErrorEvent`. + * + * @param {String} type The name of the event + * @param {Object} [options] A dictionary object that allows for setting + * attributes via object members of the same name + * @param {*} [options.error=null] The error that generated this event + * @param {String} [options.message=''] The error message + */ + constructor(type, options = {}) { + super(type); + + this[kError] = options.error === undefined ? null : options.error; + this[kMessage] = options.message === undefined ? '' : options.message; + } + + /** + * @type {*} + */ + get error() { + return this[kError]; + } + + /** + * @type {String} + */ + get message() { + return this[kMessage]; + } +} + +Object.defineProperty(ErrorEvent.prototype, 'error', { enumerable: true }); +Object.defineProperty(ErrorEvent.prototype, 'message', { enumerable: true }); + +/** + * Class representing a message event. + * + * @extends Event + */ +class MessageEvent extends Event { + /** + * Create a new `MessageEvent`. + * + * @param {String} type The name of the event + * @param {Object} [options] A dictionary object that allows for setting + * attributes via object members of the same name + * @param {*} [options.data=null] The message content + */ + constructor(type, options = {}) { + super(type); + + this[kData] = options.data === undefined ? null : options.data; + } + + /** + * @type {*} + */ + get data() { + return this[kData]; + } +} + +Object.defineProperty(MessageEvent.prototype, 'data', { enumerable: true }); + +/** + * This provides methods for emulating the `EventTarget` interface. It's not + * meant to be used directly. + * + * @mixin + */ +const EventTarget = { + /** + * Register an event listener. + * + * @param {String} type A string representing the event type to listen for + * @param {(Function|Object)} handler The listener to add + * @param {Object} [options] An options object specifies characteristics about + * the event listener + * @param {Boolean} [options.once=false] A `Boolean` indicating that the + * listener should be invoked at most once after being added. If `true`, + * the listener would be automatically removed when invoked. + * @public + */ + addEventListener(type, handler, options = {}) { + for (const listener of this.listeners(type)) { + if ( + !options[kForOnEventAttribute] && + listener[kListener] === handler && + !listener[kForOnEventAttribute] + ) { + return; + } + } + + let wrapper; + + if (type === 'message') { + wrapper = function onMessage(data, isBinary) { + const event = new MessageEvent('message', { + data: isBinary ? data : data.toString() + }); + + event[kTarget] = this; + callListener(handler, this, event); + }; + } else if (type === 'close') { + wrapper = function onClose(code, message) { + const event = new CloseEvent('close', { + code, + reason: message.toString(), + wasClean: this._closeFrameReceived && this._closeFrameSent + }); + + event[kTarget] = this; + callListener(handler, this, event); + }; + } else if (type === 'error') { + wrapper = function onError(error) { + const event = new ErrorEvent('error', { + error, + message: error.message + }); + + event[kTarget] = this; + callListener(handler, this, event); + }; + } else if (type === 'open') { + wrapper = function onOpen() { + const event = new Event('open'); + + event[kTarget] = this; + callListener(handler, this, event); + }; + } else { + return; + } + + wrapper[kForOnEventAttribute] = !!options[kForOnEventAttribute]; + wrapper[kListener] = handler; + + if (options.once) { + this.once(type, wrapper); + } else { + this.on(type, wrapper); + } + }, + + /** + * Remove an event listener. + * + * @param {String} type A string representing the event type to remove + * @param {(Function|Object)} handler The listener to remove + * @public + */ + removeEventListener(type, handler) { + for (const listener of this.listeners(type)) { + if (listener[kListener] === handler && !listener[kForOnEventAttribute]) { + this.removeListener(type, listener); + break; + } + } + } +}; + +module.exports = { + CloseEvent, + ErrorEvent, + Event, + EventTarget, + MessageEvent +}; + +/** + * Call an event listener + * + * @param {(Function|Object)} listener The listener to call + * @param {*} thisArg The value to use as `this`` when calling the listener + * @param {Event} event The event to pass to the listener + * @private + */ +function callListener(listener, thisArg, event) { + if (typeof listener === 'object' && listener.handleEvent) { + listener.handleEvent.call(listener, event); + } else { + listener.call(thisArg, event); + } +} diff --git a/node_modules/ws/lib/extension.js b/node_modules/ws/lib/extension.js new file mode 100644 index 0000000..3d7895c --- /dev/null +++ b/node_modules/ws/lib/extension.js @@ -0,0 +1,203 @@ +'use strict'; + +const { tokenChars } = require('./validation'); + +/** + * Adds an offer to the map of extension offers or a parameter to the map of + * parameters. + * + * @param {Object} dest The map of extension offers or parameters + * @param {String} name The extension or parameter name + * @param {(Object|Boolean|String)} elem The extension parameters or the + * parameter value + * @private + */ +function push(dest, name, elem) { + if (dest[name] === undefined) dest[name] = [elem]; + else dest[name].push(elem); +} + +/** + * Parses the `Sec-WebSocket-Extensions` header into an object. + * + * @param {String} header The field value of the header + * @return {Object} The parsed object + * @public + */ +function parse(header) { + const offers = Object.create(null); + let params = Object.create(null); + let mustUnescape = false; + let isEscaping = false; + let inQuotes = false; + let extensionName; + let paramName; + let start = -1; + let code = -1; + let end = -1; + let i = 0; + + for (; i < header.length; i++) { + code = header.charCodeAt(i); + + if (extensionName === undefined) { + if (end === -1 && tokenChars[code] === 1) { + if (start === -1) start = i; + } else if ( + i !== 0 && + (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */ + ) { + if (end === -1 && start !== -1) end = i; + } else if (code === 0x3b /* ';' */ || code === 0x2c /* ',' */) { + if (start === -1) { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + + if (end === -1) end = i; + const name = header.slice(start, end); + if (code === 0x2c) { + push(offers, name, params); + params = Object.create(null); + } else { + extensionName = name; + } + + start = end = -1; + } else { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + } else if (paramName === undefined) { + if (end === -1 && tokenChars[code] === 1) { + if (start === -1) start = i; + } else if (code === 0x20 || code === 0x09) { + if (end === -1 && start !== -1) end = i; + } else if (code === 0x3b || code === 0x2c) { + if (start === -1) { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + + if (end === -1) end = i; + push(params, header.slice(start, end), true); + if (code === 0x2c) { + push(offers, extensionName, params); + params = Object.create(null); + extensionName = undefined; + } + + start = end = -1; + } else if (code === 0x3d /* '=' */ && start !== -1 && end === -1) { + paramName = header.slice(start, i); + start = end = -1; + } else { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + } else { + // + // The value of a quoted-string after unescaping must conform to the + // token ABNF, so only token characters are valid. + // Ref: https://tools.ietf.org/html/rfc6455#section-9.1 + // + if (isEscaping) { + if (tokenChars[code] !== 1) { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + if (start === -1) start = i; + else if (!mustUnescape) mustUnescape = true; + isEscaping = false; + } else if (inQuotes) { + if (tokenChars[code] === 1) { + if (start === -1) start = i; + } else if (code === 0x22 /* '"' */ && start !== -1) { + inQuotes = false; + end = i; + } else if (code === 0x5c /* '\' */) { + isEscaping = true; + } else { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + } else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) { + inQuotes = true; + } else if (end === -1 && tokenChars[code] === 1) { + if (start === -1) start = i; + } else if (start !== -1 && (code === 0x20 || code === 0x09)) { + if (end === -1) end = i; + } else if (code === 0x3b || code === 0x2c) { + if (start === -1) { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + + if (end === -1) end = i; + let value = header.slice(start, end); + if (mustUnescape) { + value = value.replace(/\\/g, ''); + mustUnescape = false; + } + push(params, paramName, value); + if (code === 0x2c) { + push(offers, extensionName, params); + params = Object.create(null); + extensionName = undefined; + } + + paramName = undefined; + start = end = -1; + } else { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + } + } + + if (start === -1 || inQuotes || code === 0x20 || code === 0x09) { + throw new SyntaxError('Unexpected end of input'); + } + + if (end === -1) end = i; + const token = header.slice(start, end); + if (extensionName === undefined) { + push(offers, token, params); + } else { + if (paramName === undefined) { + push(params, token, true); + } else if (mustUnescape) { + push(params, paramName, token.replace(/\\/g, '')); + } else { + push(params, paramName, token); + } + push(offers, extensionName, params); + } + + return offers; +} + +/** + * Builds the `Sec-WebSocket-Extensions` header field value. + * + * @param {Object} extensions The map of extensions and parameters to format + * @return {String} A string representing the given object + * @public + */ +function format(extensions) { + return Object.keys(extensions) + .map((extension) => { + let configurations = extensions[extension]; + if (!Array.isArray(configurations)) configurations = [configurations]; + return configurations + .map((params) => { + return [extension] + .concat( + Object.keys(params).map((k) => { + let values = params[k]; + if (!Array.isArray(values)) values = [values]; + return values + .map((v) => (v === true ? k : `${k}=${v}`)) + .join('; '); + }) + ) + .join('; '); + }) + .join(', '); + }) + .join(', '); +} + +module.exports = { format, parse }; diff --git a/node_modules/ws/lib/limiter.js b/node_modules/ws/lib/limiter.js new file mode 100644 index 0000000..3fd3578 --- /dev/null +++ b/node_modules/ws/lib/limiter.js @@ -0,0 +1,55 @@ +'use strict'; + +const kDone = Symbol('kDone'); +const kRun = Symbol('kRun'); + +/** + * A very simple job queue with adjustable concurrency. Adapted from + * https://github.com/STRML/async-limiter + */ +class Limiter { + /** + * Creates a new `Limiter`. + * + * @param {Number} [concurrency=Infinity] The maximum number of jobs allowed + * to run concurrently + */ + constructor(concurrency) { + this[kDone] = () => { + this.pending--; + this[kRun](); + }; + this.concurrency = concurrency || Infinity; + this.jobs = []; + this.pending = 0; + } + + /** + * Adds a job to the queue. + * + * @param {Function} job The job to run + * @public + */ + add(job) { + this.jobs.push(job); + this[kRun](); + } + + /** + * Removes a job from the queue and runs it if possible. + * + * @private + */ + [kRun]() { + if (this.pending === this.concurrency) return; + + if (this.jobs.length) { + const job = this.jobs.shift(); + + this.pending++; + job(this[kDone]); + } + } +} + +module.exports = Limiter; diff --git a/node_modules/ws/lib/permessage-deflate.js b/node_modules/ws/lib/permessage-deflate.js new file mode 100644 index 0000000..77d918b --- /dev/null +++ b/node_modules/ws/lib/permessage-deflate.js @@ -0,0 +1,514 @@ +'use strict'; + +const zlib = require('zlib'); + +const bufferUtil = require('./buffer-util'); +const Limiter = require('./limiter'); +const { kStatusCode } = require('./constants'); + +const FastBuffer = Buffer[Symbol.species]; +const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]); +const kPerMessageDeflate = Symbol('permessage-deflate'); +const kTotalLength = Symbol('total-length'); +const kCallback = Symbol('callback'); +const kBuffers = Symbol('buffers'); +const kError = Symbol('error'); + +// +// We limit zlib concurrency, which prevents severe memory fragmentation +// as documented in https://github.com/nodejs/node/issues/8871#issuecomment-250915913 +// and https://github.com/websockets/ws/issues/1202 +// +// Intentionally global; it's the global thread pool that's an issue. +// +let zlibLimiter; + +/** + * permessage-deflate implementation. + */ +class PerMessageDeflate { + /** + * Creates a PerMessageDeflate instance. + * + * @param {Object} [options] Configuration options + * @param {(Boolean|Number)} [options.clientMaxWindowBits] Advertise support + * for, or request, a custom client window size + * @param {Boolean} [options.clientNoContextTakeover=false] Advertise/ + * acknowledge disabling of client context takeover + * @param {Number} [options.concurrencyLimit=10] The number of concurrent + * calls to zlib + * @param {(Boolean|Number)} [options.serverMaxWindowBits] Request/confirm the + * use of a custom server window size + * @param {Boolean} [options.serverNoContextTakeover=false] Request/accept + * disabling of server context takeover + * @param {Number} [options.threshold=1024] Size (in bytes) below which + * messages should not be compressed if context takeover is disabled + * @param {Object} [options.zlibDeflateOptions] Options to pass to zlib on + * deflate + * @param {Object} [options.zlibInflateOptions] Options to pass to zlib on + * inflate + * @param {Boolean} [isServer=false] Create the instance in either server or + * client mode + * @param {Number} [maxPayload=0] The maximum allowed message length + */ + constructor(options, isServer, maxPayload) { + this._maxPayload = maxPayload | 0; + this._options = options || {}; + this._threshold = + this._options.threshold !== undefined ? this._options.threshold : 1024; + this._isServer = !!isServer; + this._deflate = null; + this._inflate = null; + + this.params = null; + + if (!zlibLimiter) { + const concurrency = + this._options.concurrencyLimit !== undefined + ? this._options.concurrencyLimit + : 10; + zlibLimiter = new Limiter(concurrency); + } + } + + /** + * @type {String} + */ + static get extensionName() { + return 'permessage-deflate'; + } + + /** + * Create an extension negotiation offer. + * + * @return {Object} Extension parameters + * @public + */ + offer() { + const params = {}; + + if (this._options.serverNoContextTakeover) { + params.server_no_context_takeover = true; + } + if (this._options.clientNoContextTakeover) { + params.client_no_context_takeover = true; + } + if (this._options.serverMaxWindowBits) { + params.server_max_window_bits = this._options.serverMaxWindowBits; + } + if (this._options.clientMaxWindowBits) { + params.client_max_window_bits = this._options.clientMaxWindowBits; + } else if (this._options.clientMaxWindowBits == null) { + params.client_max_window_bits = true; + } + + return params; + } + + /** + * Accept an extension negotiation offer/response. + * + * @param {Array} configurations The extension negotiation offers/reponse + * @return {Object} Accepted configuration + * @public + */ + accept(configurations) { + configurations = this.normalizeParams(configurations); + + this.params = this._isServer + ? this.acceptAsServer(configurations) + : this.acceptAsClient(configurations); + + return this.params; + } + + /** + * Releases all resources used by the extension. + * + * @public + */ + cleanup() { + if (this._inflate) { + this._inflate.close(); + this._inflate = null; + } + + if (this._deflate) { + const callback = this._deflate[kCallback]; + + this._deflate.close(); + this._deflate = null; + + if (callback) { + callback( + new Error( + 'The deflate stream was closed while data was being processed' + ) + ); + } + } + } + + /** + * Accept an extension negotiation offer. + * + * @param {Array} offers The extension negotiation offers + * @return {Object} Accepted configuration + * @private + */ + acceptAsServer(offers) { + const opts = this._options; + const accepted = offers.find((params) => { + if ( + (opts.serverNoContextTakeover === false && + params.server_no_context_takeover) || + (params.server_max_window_bits && + (opts.serverMaxWindowBits === false || + (typeof opts.serverMaxWindowBits === 'number' && + opts.serverMaxWindowBits > params.server_max_window_bits))) || + (typeof opts.clientMaxWindowBits === 'number' && + !params.client_max_window_bits) + ) { + return false; + } + + return true; + }); + + if (!accepted) { + throw new Error('None of the extension offers can be accepted'); + } + + if (opts.serverNoContextTakeover) { + accepted.server_no_context_takeover = true; + } + if (opts.clientNoContextTakeover) { + accepted.client_no_context_takeover = true; + } + if (typeof opts.serverMaxWindowBits === 'number') { + accepted.server_max_window_bits = opts.serverMaxWindowBits; + } + if (typeof opts.clientMaxWindowBits === 'number') { + accepted.client_max_window_bits = opts.clientMaxWindowBits; + } else if ( + accepted.client_max_window_bits === true || + opts.clientMaxWindowBits === false + ) { + delete accepted.client_max_window_bits; + } + + return accepted; + } + + /** + * Accept the extension negotiation response. + * + * @param {Array} response The extension negotiation response + * @return {Object} Accepted configuration + * @private + */ + acceptAsClient(response) { + const params = response[0]; + + if ( + this._options.clientNoContextTakeover === false && + params.client_no_context_takeover + ) { + throw new Error('Unexpected parameter "client_no_context_takeover"'); + } + + if (!params.client_max_window_bits) { + if (typeof this._options.clientMaxWindowBits === 'number') { + params.client_max_window_bits = this._options.clientMaxWindowBits; + } + } else if ( + this._options.clientMaxWindowBits === false || + (typeof this._options.clientMaxWindowBits === 'number' && + params.client_max_window_bits > this._options.clientMaxWindowBits) + ) { + throw new Error( + 'Unexpected or invalid parameter "client_max_window_bits"' + ); + } + + return params; + } + + /** + * Normalize parameters. + * + * @param {Array} configurations The extension negotiation offers/reponse + * @return {Array} The offers/response with normalized parameters + * @private + */ + normalizeParams(configurations) { + configurations.forEach((params) => { + Object.keys(params).forEach((key) => { + let value = params[key]; + + if (value.length > 1) { + throw new Error(`Parameter "${key}" must have only a single value`); + } + + value = value[0]; + + if (key === 'client_max_window_bits') { + if (value !== true) { + const num = +value; + if (!Number.isInteger(num) || num < 8 || num > 15) { + throw new TypeError( + `Invalid value for parameter "${key}": ${value}` + ); + } + value = num; + } else if (!this._isServer) { + throw new TypeError( + `Invalid value for parameter "${key}": ${value}` + ); + } + } else if (key === 'server_max_window_bits') { + const num = +value; + if (!Number.isInteger(num) || num < 8 || num > 15) { + throw new TypeError( + `Invalid value for parameter "${key}": ${value}` + ); + } + value = num; + } else if ( + key === 'client_no_context_takeover' || + key === 'server_no_context_takeover' + ) { + if (value !== true) { + throw new TypeError( + `Invalid value for parameter "${key}": ${value}` + ); + } + } else { + throw new Error(`Unknown parameter "${key}"`); + } + + params[key] = value; + }); + }); + + return configurations; + } + + /** + * Decompress data. Concurrency limited. + * + * @param {Buffer} data Compressed data + * @param {Boolean} fin Specifies whether or not this is the last fragment + * @param {Function} callback Callback + * @public + */ + decompress(data, fin, callback) { + zlibLimiter.add((done) => { + this._decompress(data, fin, (err, result) => { + done(); + callback(err, result); + }); + }); + } + + /** + * Compress data. Concurrency limited. + * + * @param {(Buffer|String)} data Data to compress + * @param {Boolean} fin Specifies whether or not this is the last fragment + * @param {Function} callback Callback + * @public + */ + compress(data, fin, callback) { + zlibLimiter.add((done) => { + this._compress(data, fin, (err, result) => { + done(); + callback(err, result); + }); + }); + } + + /** + * Decompress data. + * + * @param {Buffer} data Compressed data + * @param {Boolean} fin Specifies whether or not this is the last fragment + * @param {Function} callback Callback + * @private + */ + _decompress(data, fin, callback) { + const endpoint = this._isServer ? 'client' : 'server'; + + if (!this._inflate) { + const key = `${endpoint}_max_window_bits`; + const windowBits = + typeof this.params[key] !== 'number' + ? zlib.Z_DEFAULT_WINDOWBITS + : this.params[key]; + + this._inflate = zlib.createInflateRaw({ + ...this._options.zlibInflateOptions, + windowBits + }); + this._inflate[kPerMessageDeflate] = this; + this._inflate[kTotalLength] = 0; + this._inflate[kBuffers] = []; + this._inflate.on('error', inflateOnError); + this._inflate.on('data', inflateOnData); + } + + this._inflate[kCallback] = callback; + + this._inflate.write(data); + if (fin) this._inflate.write(TRAILER); + + this._inflate.flush(() => { + const err = this._inflate[kError]; + + if (err) { + this._inflate.close(); + this._inflate = null; + callback(err); + return; + } + + const data = bufferUtil.concat( + this._inflate[kBuffers], + this._inflate[kTotalLength] + ); + + if (this._inflate._readableState.endEmitted) { + this._inflate.close(); + this._inflate = null; + } else { + this._inflate[kTotalLength] = 0; + this._inflate[kBuffers] = []; + + if (fin && this.params[`${endpoint}_no_context_takeover`]) { + this._inflate.reset(); + } + } + + callback(null, data); + }); + } + + /** + * Compress data. + * + * @param {(Buffer|String)} data Data to compress + * @param {Boolean} fin Specifies whether or not this is the last fragment + * @param {Function} callback Callback + * @private + */ + _compress(data, fin, callback) { + const endpoint = this._isServer ? 'server' : 'client'; + + if (!this._deflate) { + const key = `${endpoint}_max_window_bits`; + const windowBits = + typeof this.params[key] !== 'number' + ? zlib.Z_DEFAULT_WINDOWBITS + : this.params[key]; + + this._deflate = zlib.createDeflateRaw({ + ...this._options.zlibDeflateOptions, + windowBits + }); + + this._deflate[kTotalLength] = 0; + this._deflate[kBuffers] = []; + + this._deflate.on('data', deflateOnData); + } + + this._deflate[kCallback] = callback; + + this._deflate.write(data); + this._deflate.flush(zlib.Z_SYNC_FLUSH, () => { + if (!this._deflate) { + // + // The deflate stream was closed while data was being processed. + // + return; + } + + let data = bufferUtil.concat( + this._deflate[kBuffers], + this._deflate[kTotalLength] + ); + + if (fin) { + data = new FastBuffer(data.buffer, data.byteOffset, data.length - 4); + } + + // + // Ensure that the callback will not be called again in + // `PerMessageDeflate#cleanup()`. + // + this._deflate[kCallback] = null; + + this._deflate[kTotalLength] = 0; + this._deflate[kBuffers] = []; + + if (fin && this.params[`${endpoint}_no_context_takeover`]) { + this._deflate.reset(); + } + + callback(null, data); + }); + } +} + +module.exports = PerMessageDeflate; + +/** + * The listener of the `zlib.DeflateRaw` stream `'data'` event. + * + * @param {Buffer} chunk A chunk of data + * @private + */ +function deflateOnData(chunk) { + this[kBuffers].push(chunk); + this[kTotalLength] += chunk.length; +} + +/** + * The listener of the `zlib.InflateRaw` stream `'data'` event. + * + * @param {Buffer} chunk A chunk of data + * @private + */ +function inflateOnData(chunk) { + this[kTotalLength] += chunk.length; + + if ( + this[kPerMessageDeflate]._maxPayload < 1 || + this[kTotalLength] <= this[kPerMessageDeflate]._maxPayload + ) { + this[kBuffers].push(chunk); + return; + } + + this[kError] = new RangeError('Max payload size exceeded'); + this[kError].code = 'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'; + this[kError][kStatusCode] = 1009; + this.removeListener('data', inflateOnData); + this.reset(); +} + +/** + * The listener of the `zlib.InflateRaw` stream `'error'` event. + * + * @param {Error} err The emitted error + * @private + */ +function inflateOnError(err) { + // + // There is no need to call `Zlib#close()` as the handle is automatically + // closed when an error is emitted. + // + this[kPerMessageDeflate]._inflate = null; + err[kStatusCode] = 1007; + this[kCallback](err); +} diff --git a/node_modules/ws/lib/receiver.js b/node_modules/ws/lib/receiver.js new file mode 100644 index 0000000..54d9b4f --- /dev/null +++ b/node_modules/ws/lib/receiver.js @@ -0,0 +1,706 @@ +'use strict'; + +const { Writable } = require('stream'); + +const PerMessageDeflate = require('./permessage-deflate'); +const { + BINARY_TYPES, + EMPTY_BUFFER, + kStatusCode, + kWebSocket +} = require('./constants'); +const { concat, toArrayBuffer, unmask } = require('./buffer-util'); +const { isValidStatusCode, isValidUTF8 } = require('./validation'); + +const FastBuffer = Buffer[Symbol.species]; + +const GET_INFO = 0; +const GET_PAYLOAD_LENGTH_16 = 1; +const GET_PAYLOAD_LENGTH_64 = 2; +const GET_MASK = 3; +const GET_DATA = 4; +const INFLATING = 5; +const DEFER_EVENT = 6; + +/** + * HyBi Receiver implementation. + * + * @extends Writable + */ +class Receiver extends Writable { + /** + * Creates a Receiver instance. + * + * @param {Object} [options] Options object + * @param {Boolean} [options.allowSynchronousEvents=true] Specifies whether + * any of the `'message'`, `'ping'`, and `'pong'` events can be emitted + * multiple times in the same tick + * @param {String} [options.binaryType=nodebuffer] The type for binary data + * @param {Object} [options.extensions] An object containing the negotiated + * extensions + * @param {Boolean} [options.isServer=false] Specifies whether to operate in + * client or server mode + * @param {Number} [options.maxPayload=0] The maximum allowed message length + * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or + * not to skip UTF-8 validation for text and close messages + */ + constructor(options = {}) { + super(); + + this._allowSynchronousEvents = + options.allowSynchronousEvents !== undefined + ? options.allowSynchronousEvents + : true; + this._binaryType = options.binaryType || BINARY_TYPES[0]; + this._extensions = options.extensions || {}; + this._isServer = !!options.isServer; + this._maxPayload = options.maxPayload | 0; + this._skipUTF8Validation = !!options.skipUTF8Validation; + this[kWebSocket] = undefined; + + this._bufferedBytes = 0; + this._buffers = []; + + this._compressed = false; + this._payloadLength = 0; + this._mask = undefined; + this._fragmented = 0; + this._masked = false; + this._fin = false; + this._opcode = 0; + + this._totalPayloadLength = 0; + this._messageLength = 0; + this._fragments = []; + + this._errored = false; + this._loop = false; + this._state = GET_INFO; + } + + /** + * Implements `Writable.prototype._write()`. + * + * @param {Buffer} chunk The chunk of data to write + * @param {String} encoding The character encoding of `chunk` + * @param {Function} cb Callback + * @private + */ + _write(chunk, encoding, cb) { + if (this._opcode === 0x08 && this._state == GET_INFO) return cb(); + + this._bufferedBytes += chunk.length; + this._buffers.push(chunk); + this.startLoop(cb); + } + + /** + * Consumes `n` bytes from the buffered data. + * + * @param {Number} n The number of bytes to consume + * @return {Buffer} The consumed bytes + * @private + */ + consume(n) { + this._bufferedBytes -= n; + + if (n === this._buffers[0].length) return this._buffers.shift(); + + if (n < this._buffers[0].length) { + const buf = this._buffers[0]; + this._buffers[0] = new FastBuffer( + buf.buffer, + buf.byteOffset + n, + buf.length - n + ); + + return new FastBuffer(buf.buffer, buf.byteOffset, n); + } + + const dst = Buffer.allocUnsafe(n); + + do { + const buf = this._buffers[0]; + const offset = dst.length - n; + + if (n >= buf.length) { + dst.set(this._buffers.shift(), offset); + } else { + dst.set(new Uint8Array(buf.buffer, buf.byteOffset, n), offset); + this._buffers[0] = new FastBuffer( + buf.buffer, + buf.byteOffset + n, + buf.length - n + ); + } + + n -= buf.length; + } while (n > 0); + + return dst; + } + + /** + * Starts the parsing loop. + * + * @param {Function} cb Callback + * @private + */ + startLoop(cb) { + this._loop = true; + + do { + switch (this._state) { + case GET_INFO: + this.getInfo(cb); + break; + case GET_PAYLOAD_LENGTH_16: + this.getPayloadLength16(cb); + break; + case GET_PAYLOAD_LENGTH_64: + this.getPayloadLength64(cb); + break; + case GET_MASK: + this.getMask(); + break; + case GET_DATA: + this.getData(cb); + break; + case INFLATING: + case DEFER_EVENT: + this._loop = false; + return; + } + } while (this._loop); + + if (!this._errored) cb(); + } + + /** + * Reads the first two bytes of a frame. + * + * @param {Function} cb Callback + * @private + */ + getInfo(cb) { + if (this._bufferedBytes < 2) { + this._loop = false; + return; + } + + const buf = this.consume(2); + + if ((buf[0] & 0x30) !== 0x00) { + const error = this.createError( + RangeError, + 'RSV2 and RSV3 must be clear', + true, + 1002, + 'WS_ERR_UNEXPECTED_RSV_2_3' + ); + + cb(error); + return; + } + + const compressed = (buf[0] & 0x40) === 0x40; + + if (compressed && !this._extensions[PerMessageDeflate.extensionName]) { + const error = this.createError( + RangeError, + 'RSV1 must be clear', + true, + 1002, + 'WS_ERR_UNEXPECTED_RSV_1' + ); + + cb(error); + return; + } + + this._fin = (buf[0] & 0x80) === 0x80; + this._opcode = buf[0] & 0x0f; + this._payloadLength = buf[1] & 0x7f; + + if (this._opcode === 0x00) { + if (compressed) { + const error = this.createError( + RangeError, + 'RSV1 must be clear', + true, + 1002, + 'WS_ERR_UNEXPECTED_RSV_1' + ); + + cb(error); + return; + } + + if (!this._fragmented) { + const error = this.createError( + RangeError, + 'invalid opcode 0', + true, + 1002, + 'WS_ERR_INVALID_OPCODE' + ); + + cb(error); + return; + } + + this._opcode = this._fragmented; + } else if (this._opcode === 0x01 || this._opcode === 0x02) { + if (this._fragmented) { + const error = this.createError( + RangeError, + `invalid opcode ${this._opcode}`, + true, + 1002, + 'WS_ERR_INVALID_OPCODE' + ); + + cb(error); + return; + } + + this._compressed = compressed; + } else if (this._opcode > 0x07 && this._opcode < 0x0b) { + if (!this._fin) { + const error = this.createError( + RangeError, + 'FIN must be set', + true, + 1002, + 'WS_ERR_EXPECTED_FIN' + ); + + cb(error); + return; + } + + if (compressed) { + const error = this.createError( + RangeError, + 'RSV1 must be clear', + true, + 1002, + 'WS_ERR_UNEXPECTED_RSV_1' + ); + + cb(error); + return; + } + + if ( + this._payloadLength > 0x7d || + (this._opcode === 0x08 && this._payloadLength === 1) + ) { + const error = this.createError( + RangeError, + `invalid payload length ${this._payloadLength}`, + true, + 1002, + 'WS_ERR_INVALID_CONTROL_PAYLOAD_LENGTH' + ); + + cb(error); + return; + } + } else { + const error = this.createError( + RangeError, + `invalid opcode ${this._opcode}`, + true, + 1002, + 'WS_ERR_INVALID_OPCODE' + ); + + cb(error); + return; + } + + if (!this._fin && !this._fragmented) this._fragmented = this._opcode; + this._masked = (buf[1] & 0x80) === 0x80; + + if (this._isServer) { + if (!this._masked) { + const error = this.createError( + RangeError, + 'MASK must be set', + true, + 1002, + 'WS_ERR_EXPECTED_MASK' + ); + + cb(error); + return; + } + } else if (this._masked) { + const error = this.createError( + RangeError, + 'MASK must be clear', + true, + 1002, + 'WS_ERR_UNEXPECTED_MASK' + ); + + cb(error); + return; + } + + if (this._payloadLength === 126) this._state = GET_PAYLOAD_LENGTH_16; + else if (this._payloadLength === 127) this._state = GET_PAYLOAD_LENGTH_64; + else this.haveLength(cb); + } + + /** + * Gets extended payload length (7+16). + * + * @param {Function} cb Callback + * @private + */ + getPayloadLength16(cb) { + if (this._bufferedBytes < 2) { + this._loop = false; + return; + } + + this._payloadLength = this.consume(2).readUInt16BE(0); + this.haveLength(cb); + } + + /** + * Gets extended payload length (7+64). + * + * @param {Function} cb Callback + * @private + */ + getPayloadLength64(cb) { + if (this._bufferedBytes < 8) { + this._loop = false; + return; + } + + const buf = this.consume(8); + const num = buf.readUInt32BE(0); + + // + // The maximum safe integer in JavaScript is 2^53 - 1. An error is returned + // if payload length is greater than this number. + // + if (num > Math.pow(2, 53 - 32) - 1) { + const error = this.createError( + RangeError, + 'Unsupported WebSocket frame: payload length > 2^53 - 1', + false, + 1009, + 'WS_ERR_UNSUPPORTED_DATA_PAYLOAD_LENGTH' + ); + + cb(error); + return; + } + + this._payloadLength = num * Math.pow(2, 32) + buf.readUInt32BE(4); + this.haveLength(cb); + } + + /** + * Payload length has been read. + * + * @param {Function} cb Callback + * @private + */ + haveLength(cb) { + if (this._payloadLength && this._opcode < 0x08) { + this._totalPayloadLength += this._payloadLength; + if (this._totalPayloadLength > this._maxPayload && this._maxPayload > 0) { + const error = this.createError( + RangeError, + 'Max payload size exceeded', + false, + 1009, + 'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH' + ); + + cb(error); + return; + } + } + + if (this._masked) this._state = GET_MASK; + else this._state = GET_DATA; + } + + /** + * Reads mask bytes. + * + * @private + */ + getMask() { + if (this._bufferedBytes < 4) { + this._loop = false; + return; + } + + this._mask = this.consume(4); + this._state = GET_DATA; + } + + /** + * Reads data bytes. + * + * @param {Function} cb Callback + * @private + */ + getData(cb) { + let data = EMPTY_BUFFER; + + if (this._payloadLength) { + if (this._bufferedBytes < this._payloadLength) { + this._loop = false; + return; + } + + data = this.consume(this._payloadLength); + + if ( + this._masked && + (this._mask[0] | this._mask[1] | this._mask[2] | this._mask[3]) !== 0 + ) { + unmask(data, this._mask); + } + } + + if (this._opcode > 0x07) { + this.controlMessage(data, cb); + return; + } + + if (this._compressed) { + this._state = INFLATING; + this.decompress(data, cb); + return; + } + + if (data.length) { + // + // This message is not compressed so its length is the sum of the payload + // length of all fragments. + // + this._messageLength = this._totalPayloadLength; + this._fragments.push(data); + } + + this.dataMessage(cb); + } + + /** + * Decompresses data. + * + * @param {Buffer} data Compressed data + * @param {Function} cb Callback + * @private + */ + decompress(data, cb) { + const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName]; + + perMessageDeflate.decompress(data, this._fin, (err, buf) => { + if (err) return cb(err); + + if (buf.length) { + this._messageLength += buf.length; + if (this._messageLength > this._maxPayload && this._maxPayload > 0) { + const error = this.createError( + RangeError, + 'Max payload size exceeded', + false, + 1009, + 'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH' + ); + + cb(error); + return; + } + + this._fragments.push(buf); + } + + this.dataMessage(cb); + if (this._state === GET_INFO) this.startLoop(cb); + }); + } + + /** + * Handles a data message. + * + * @param {Function} cb Callback + * @private + */ + dataMessage(cb) { + if (!this._fin) { + this._state = GET_INFO; + return; + } + + const messageLength = this._messageLength; + const fragments = this._fragments; + + this._totalPayloadLength = 0; + this._messageLength = 0; + this._fragmented = 0; + this._fragments = []; + + if (this._opcode === 2) { + let data; + + if (this._binaryType === 'nodebuffer') { + data = concat(fragments, messageLength); + } else if (this._binaryType === 'arraybuffer') { + data = toArrayBuffer(concat(fragments, messageLength)); + } else if (this._binaryType === 'blob') { + data = new Blob(fragments); + } else { + data = fragments; + } + + if (this._allowSynchronousEvents) { + this.emit('message', data, true); + this._state = GET_INFO; + } else { + this._state = DEFER_EVENT; + setImmediate(() => { + this.emit('message', data, true); + this._state = GET_INFO; + this.startLoop(cb); + }); + } + } else { + const buf = concat(fragments, messageLength); + + if (!this._skipUTF8Validation && !isValidUTF8(buf)) { + const error = this.createError( + Error, + 'invalid UTF-8 sequence', + true, + 1007, + 'WS_ERR_INVALID_UTF8' + ); + + cb(error); + return; + } + + if (this._state === INFLATING || this._allowSynchronousEvents) { + this.emit('message', buf, false); + this._state = GET_INFO; + } else { + this._state = DEFER_EVENT; + setImmediate(() => { + this.emit('message', buf, false); + this._state = GET_INFO; + this.startLoop(cb); + }); + } + } + } + + /** + * Handles a control message. + * + * @param {Buffer} data Data to handle + * @return {(Error|RangeError|undefined)} A possible error + * @private + */ + controlMessage(data, cb) { + if (this._opcode === 0x08) { + if (data.length === 0) { + this._loop = false; + this.emit('conclude', 1005, EMPTY_BUFFER); + this.end(); + } else { + const code = data.readUInt16BE(0); + + if (!isValidStatusCode(code)) { + const error = this.createError( + RangeError, + `invalid status code ${code}`, + true, + 1002, + 'WS_ERR_INVALID_CLOSE_CODE' + ); + + cb(error); + return; + } + + const buf = new FastBuffer( + data.buffer, + data.byteOffset + 2, + data.length - 2 + ); + + if (!this._skipUTF8Validation && !isValidUTF8(buf)) { + const error = this.createError( + Error, + 'invalid UTF-8 sequence', + true, + 1007, + 'WS_ERR_INVALID_UTF8' + ); + + cb(error); + return; + } + + this._loop = false; + this.emit('conclude', code, buf); + this.end(); + } + + this._state = GET_INFO; + return; + } + + if (this._allowSynchronousEvents) { + this.emit(this._opcode === 0x09 ? 'ping' : 'pong', data); + this._state = GET_INFO; + } else { + this._state = DEFER_EVENT; + setImmediate(() => { + this.emit(this._opcode === 0x09 ? 'ping' : 'pong', data); + this._state = GET_INFO; + this.startLoop(cb); + }); + } + } + + /** + * Builds an error object. + * + * @param {function(new:Error|RangeError)} ErrorCtor The error constructor + * @param {String} message The error message + * @param {Boolean} prefix Specifies whether or not to add a default prefix to + * `message` + * @param {Number} statusCode The status code + * @param {String} errorCode The exposed error code + * @return {(Error|RangeError)} The error + * @private + */ + createError(ErrorCtor, message, prefix, statusCode, errorCode) { + this._loop = false; + this._errored = true; + + const err = new ErrorCtor( + prefix ? `Invalid WebSocket frame: ${message}` : message + ); + + Error.captureStackTrace(err, this.createError); + err.code = errorCode; + err[kStatusCode] = statusCode; + return err; + } +} + +module.exports = Receiver; diff --git a/node_modules/ws/lib/sender.js b/node_modules/ws/lib/sender.js new file mode 100644 index 0000000..ee16cea --- /dev/null +++ b/node_modules/ws/lib/sender.js @@ -0,0 +1,602 @@ +/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Duplex" }] */ + +'use strict'; + +const { Duplex } = require('stream'); +const { randomFillSync } = require('crypto'); + +const PerMessageDeflate = require('./permessage-deflate'); +const { EMPTY_BUFFER, kWebSocket, NOOP } = require('./constants'); +const { isBlob, isValidStatusCode } = require('./validation'); +const { mask: applyMask, toBuffer } = require('./buffer-util'); + +const kByteLength = Symbol('kByteLength'); +const maskBuffer = Buffer.alloc(4); +const RANDOM_POOL_SIZE = 8 * 1024; +let randomPool; +let randomPoolPointer = RANDOM_POOL_SIZE; + +const DEFAULT = 0; +const DEFLATING = 1; +const GET_BLOB_DATA = 2; + +/** + * HyBi Sender implementation. + */ +class Sender { + /** + * Creates a Sender instance. + * + * @param {Duplex} socket The connection socket + * @param {Object} [extensions] An object containing the negotiated extensions + * @param {Function} [generateMask] The function used to generate the masking + * key + */ + constructor(socket, extensions, generateMask) { + this._extensions = extensions || {}; + + if (generateMask) { + this._generateMask = generateMask; + this._maskBuffer = Buffer.alloc(4); + } + + this._socket = socket; + + this._firstFragment = true; + this._compress = false; + + this._bufferedBytes = 0; + this._queue = []; + this._state = DEFAULT; + this.onerror = NOOP; + this[kWebSocket] = undefined; + } + + /** + * Frames a piece of data according to the HyBi WebSocket protocol. + * + * @param {(Buffer|String)} data The data to frame + * @param {Object} options Options object + * @param {Boolean} [options.fin=false] Specifies whether or not to set the + * FIN bit + * @param {Function} [options.generateMask] The function used to generate the + * masking key + * @param {Boolean} [options.mask=false] Specifies whether or not to mask + * `data` + * @param {Buffer} [options.maskBuffer] The buffer used to store the masking + * key + * @param {Number} options.opcode The opcode + * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be + * modified + * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the + * RSV1 bit + * @return {(Buffer|String)[]} The framed data + * @public + */ + static frame(data, options) { + let mask; + let merge = false; + let offset = 2; + let skipMasking = false; + + if (options.mask) { + mask = options.maskBuffer || maskBuffer; + + if (options.generateMask) { + options.generateMask(mask); + } else { + if (randomPoolPointer === RANDOM_POOL_SIZE) { + /* istanbul ignore else */ + if (randomPool === undefined) { + // + // This is lazily initialized because server-sent frames must not + // be masked so it may never be used. + // + randomPool = Buffer.alloc(RANDOM_POOL_SIZE); + } + + randomFillSync(randomPool, 0, RANDOM_POOL_SIZE); + randomPoolPointer = 0; + } + + mask[0] = randomPool[randomPoolPointer++]; + mask[1] = randomPool[randomPoolPointer++]; + mask[2] = randomPool[randomPoolPointer++]; + mask[3] = randomPool[randomPoolPointer++]; + } + + skipMasking = (mask[0] | mask[1] | mask[2] | mask[3]) === 0; + offset = 6; + } + + let dataLength; + + if (typeof data === 'string') { + if ( + (!options.mask || skipMasking) && + options[kByteLength] !== undefined + ) { + dataLength = options[kByteLength]; + } else { + data = Buffer.from(data); + dataLength = data.length; + } + } else { + dataLength = data.length; + merge = options.mask && options.readOnly && !skipMasking; + } + + let payloadLength = dataLength; + + if (dataLength >= 65536) { + offset += 8; + payloadLength = 127; + } else if (dataLength > 125) { + offset += 2; + payloadLength = 126; + } + + const target = Buffer.allocUnsafe(merge ? dataLength + offset : offset); + + target[0] = options.fin ? options.opcode | 0x80 : options.opcode; + if (options.rsv1) target[0] |= 0x40; + + target[1] = payloadLength; + + if (payloadLength === 126) { + target.writeUInt16BE(dataLength, 2); + } else if (payloadLength === 127) { + target[2] = target[3] = 0; + target.writeUIntBE(dataLength, 4, 6); + } + + if (!options.mask) return [target, data]; + + target[1] |= 0x80; + target[offset - 4] = mask[0]; + target[offset - 3] = mask[1]; + target[offset - 2] = mask[2]; + target[offset - 1] = mask[3]; + + if (skipMasking) return [target, data]; + + if (merge) { + applyMask(data, mask, target, offset, dataLength); + return [target]; + } + + applyMask(data, mask, data, 0, dataLength); + return [target, data]; + } + + /** + * Sends a close message to the other peer. + * + * @param {Number} [code] The status code component of the body + * @param {(String|Buffer)} [data] The message component of the body + * @param {Boolean} [mask=false] Specifies whether or not to mask the message + * @param {Function} [cb] Callback + * @public + */ + close(code, data, mask, cb) { + let buf; + + if (code === undefined) { + buf = EMPTY_BUFFER; + } else if (typeof code !== 'number' || !isValidStatusCode(code)) { + throw new TypeError('First argument must be a valid error code number'); + } else if (data === undefined || !data.length) { + buf = Buffer.allocUnsafe(2); + buf.writeUInt16BE(code, 0); + } else { + const length = Buffer.byteLength(data); + + if (length > 123) { + throw new RangeError('The message must not be greater than 123 bytes'); + } + + buf = Buffer.allocUnsafe(2 + length); + buf.writeUInt16BE(code, 0); + + if (typeof data === 'string') { + buf.write(data, 2); + } else { + buf.set(data, 2); + } + } + + const options = { + [kByteLength]: buf.length, + fin: true, + generateMask: this._generateMask, + mask, + maskBuffer: this._maskBuffer, + opcode: 0x08, + readOnly: false, + rsv1: false + }; + + if (this._state !== DEFAULT) { + this.enqueue([this.dispatch, buf, false, options, cb]); + } else { + this.sendFrame(Sender.frame(buf, options), cb); + } + } + + /** + * Sends a ping message to the other peer. + * + * @param {*} data The message to send + * @param {Boolean} [mask=false] Specifies whether or not to mask `data` + * @param {Function} [cb] Callback + * @public + */ + ping(data, mask, cb) { + let byteLength; + let readOnly; + + if (typeof data === 'string') { + byteLength = Buffer.byteLength(data); + readOnly = false; + } else if (isBlob(data)) { + byteLength = data.size; + readOnly = false; + } else { + data = toBuffer(data); + byteLength = data.length; + readOnly = toBuffer.readOnly; + } + + if (byteLength > 125) { + throw new RangeError('The data size must not be greater than 125 bytes'); + } + + const options = { + [kByteLength]: byteLength, + fin: true, + generateMask: this._generateMask, + mask, + maskBuffer: this._maskBuffer, + opcode: 0x09, + readOnly, + rsv1: false + }; + + if (isBlob(data)) { + if (this._state !== DEFAULT) { + this.enqueue([this.getBlobData, data, false, options, cb]); + } else { + this.getBlobData(data, false, options, cb); + } + } else if (this._state !== DEFAULT) { + this.enqueue([this.dispatch, data, false, options, cb]); + } else { + this.sendFrame(Sender.frame(data, options), cb); + } + } + + /** + * Sends a pong message to the other peer. + * + * @param {*} data The message to send + * @param {Boolean} [mask=false] Specifies whether or not to mask `data` + * @param {Function} [cb] Callback + * @public + */ + pong(data, mask, cb) { + let byteLength; + let readOnly; + + if (typeof data === 'string') { + byteLength = Buffer.byteLength(data); + readOnly = false; + } else if (isBlob(data)) { + byteLength = data.size; + readOnly = false; + } else { + data = toBuffer(data); + byteLength = data.length; + readOnly = toBuffer.readOnly; + } + + if (byteLength > 125) { + throw new RangeError('The data size must not be greater than 125 bytes'); + } + + const options = { + [kByteLength]: byteLength, + fin: true, + generateMask: this._generateMask, + mask, + maskBuffer: this._maskBuffer, + opcode: 0x0a, + readOnly, + rsv1: false + }; + + if (isBlob(data)) { + if (this._state !== DEFAULT) { + this.enqueue([this.getBlobData, data, false, options, cb]); + } else { + this.getBlobData(data, false, options, cb); + } + } else if (this._state !== DEFAULT) { + this.enqueue([this.dispatch, data, false, options, cb]); + } else { + this.sendFrame(Sender.frame(data, options), cb); + } + } + + /** + * Sends a data message to the other peer. + * + * @param {*} data The message to send + * @param {Object} options Options object + * @param {Boolean} [options.binary=false] Specifies whether `data` is binary + * or text + * @param {Boolean} [options.compress=false] Specifies whether or not to + * compress `data` + * @param {Boolean} [options.fin=false] Specifies whether the fragment is the + * last one + * @param {Boolean} [options.mask=false] Specifies whether or not to mask + * `data` + * @param {Function} [cb] Callback + * @public + */ + send(data, options, cb) { + const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName]; + let opcode = options.binary ? 2 : 1; + let rsv1 = options.compress; + + let byteLength; + let readOnly; + + if (typeof data === 'string') { + byteLength = Buffer.byteLength(data); + readOnly = false; + } else if (isBlob(data)) { + byteLength = data.size; + readOnly = false; + } else { + data = toBuffer(data); + byteLength = data.length; + readOnly = toBuffer.readOnly; + } + + if (this._firstFragment) { + this._firstFragment = false; + if ( + rsv1 && + perMessageDeflate && + perMessageDeflate.params[ + perMessageDeflate._isServer + ? 'server_no_context_takeover' + : 'client_no_context_takeover' + ] + ) { + rsv1 = byteLength >= perMessageDeflate._threshold; + } + this._compress = rsv1; + } else { + rsv1 = false; + opcode = 0; + } + + if (options.fin) this._firstFragment = true; + + const opts = { + [kByteLength]: byteLength, + fin: options.fin, + generateMask: this._generateMask, + mask: options.mask, + maskBuffer: this._maskBuffer, + opcode, + readOnly, + rsv1 + }; + + if (isBlob(data)) { + if (this._state !== DEFAULT) { + this.enqueue([this.getBlobData, data, this._compress, opts, cb]); + } else { + this.getBlobData(data, this._compress, opts, cb); + } + } else if (this._state !== DEFAULT) { + this.enqueue([this.dispatch, data, this._compress, opts, cb]); + } else { + this.dispatch(data, this._compress, opts, cb); + } + } + + /** + * Gets the contents of a blob as binary data. + * + * @param {Blob} blob The blob + * @param {Boolean} [compress=false] Specifies whether or not to compress + * the data + * @param {Object} options Options object + * @param {Boolean} [options.fin=false] Specifies whether or not to set the + * FIN bit + * @param {Function} [options.generateMask] The function used to generate the + * masking key + * @param {Boolean} [options.mask=false] Specifies whether or not to mask + * `data` + * @param {Buffer} [options.maskBuffer] The buffer used to store the masking + * key + * @param {Number} options.opcode The opcode + * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be + * modified + * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the + * RSV1 bit + * @param {Function} [cb] Callback + * @private + */ + getBlobData(blob, compress, options, cb) { + this._bufferedBytes += options[kByteLength]; + this._state = GET_BLOB_DATA; + + blob + .arrayBuffer() + .then((arrayBuffer) => { + if (this._socket.destroyed) { + const err = new Error( + 'The socket was closed while the blob was being read' + ); + + // + // `callCallbacks` is called in the next tick to ensure that errors + // that might be thrown in the callbacks behave like errors thrown + // outside the promise chain. + // + process.nextTick(callCallbacks, this, err, cb); + return; + } + + this._bufferedBytes -= options[kByteLength]; + const data = toBuffer(arrayBuffer); + + if (!compress) { + this._state = DEFAULT; + this.sendFrame(Sender.frame(data, options), cb); + this.dequeue(); + } else { + this.dispatch(data, compress, options, cb); + } + }) + .catch((err) => { + // + // `onError` is called in the next tick for the same reason that + // `callCallbacks` above is. + // + process.nextTick(onError, this, err, cb); + }); + } + + /** + * Dispatches a message. + * + * @param {(Buffer|String)} data The message to send + * @param {Boolean} [compress=false] Specifies whether or not to compress + * `data` + * @param {Object} options Options object + * @param {Boolean} [options.fin=false] Specifies whether or not to set the + * FIN bit + * @param {Function} [options.generateMask] The function used to generate the + * masking key + * @param {Boolean} [options.mask=false] Specifies whether or not to mask + * `data` + * @param {Buffer} [options.maskBuffer] The buffer used to store the masking + * key + * @param {Number} options.opcode The opcode + * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be + * modified + * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the + * RSV1 bit + * @param {Function} [cb] Callback + * @private + */ + dispatch(data, compress, options, cb) { + if (!compress) { + this.sendFrame(Sender.frame(data, options), cb); + return; + } + + const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName]; + + this._bufferedBytes += options[kByteLength]; + this._state = DEFLATING; + perMessageDeflate.compress(data, options.fin, (_, buf) => { + if (this._socket.destroyed) { + const err = new Error( + 'The socket was closed while data was being compressed' + ); + + callCallbacks(this, err, cb); + return; + } + + this._bufferedBytes -= options[kByteLength]; + this._state = DEFAULT; + options.readOnly = false; + this.sendFrame(Sender.frame(buf, options), cb); + this.dequeue(); + }); + } + + /** + * Executes queued send operations. + * + * @private + */ + dequeue() { + while (this._state === DEFAULT && this._queue.length) { + const params = this._queue.shift(); + + this._bufferedBytes -= params[3][kByteLength]; + Reflect.apply(params[0], this, params.slice(1)); + } + } + + /** + * Enqueues a send operation. + * + * @param {Array} params Send operation parameters. + * @private + */ + enqueue(params) { + this._bufferedBytes += params[3][kByteLength]; + this._queue.push(params); + } + + /** + * Sends a frame. + * + * @param {Buffer[]} list The frame to send + * @param {Function} [cb] Callback + * @private + */ + sendFrame(list, cb) { + if (list.length === 2) { + this._socket.cork(); + this._socket.write(list[0]); + this._socket.write(list[1], cb); + this._socket.uncork(); + } else { + this._socket.write(list[0], cb); + } + } +} + +module.exports = Sender; + +/** + * Calls queued callbacks with an error. + * + * @param {Sender} sender The `Sender` instance + * @param {Error} err The error to call the callbacks with + * @param {Function} [cb] The first callback + * @private + */ +function callCallbacks(sender, err, cb) { + if (typeof cb === 'function') cb(err); + + for (let i = 0; i < sender._queue.length; i++) { + const params = sender._queue[i]; + const callback = params[params.length - 1]; + + if (typeof callback === 'function') callback(err); + } +} + +/** + * Handles a `Sender` error. + * + * @param {Sender} sender The `Sender` instance + * @param {Error} err The error + * @param {Function} [cb] The first pending callback + * @private + */ +function onError(sender, err, cb) { + callCallbacks(sender, err, cb); + sender.onerror(err); +} diff --git a/node_modules/ws/lib/stream.js b/node_modules/ws/lib/stream.js new file mode 100644 index 0000000..230734b --- /dev/null +++ b/node_modules/ws/lib/stream.js @@ -0,0 +1,159 @@ +'use strict'; + +const { Duplex } = require('stream'); + +/** + * Emits the `'close'` event on a stream. + * + * @param {Duplex} stream The stream. + * @private + */ +function emitClose(stream) { + stream.emit('close'); +} + +/** + * The listener of the `'end'` event. + * + * @private + */ +function duplexOnEnd() { + if (!this.destroyed && this._writableState.finished) { + this.destroy(); + } +} + +/** + * The listener of the `'error'` event. + * + * @param {Error} err The error + * @private + */ +function duplexOnError(err) { + this.removeListener('error', duplexOnError); + this.destroy(); + if (this.listenerCount('error') === 0) { + // Do not suppress the throwing behavior. + this.emit('error', err); + } +} + +/** + * Wraps a `WebSocket` in a duplex stream. + * + * @param {WebSocket} ws The `WebSocket` to wrap + * @param {Object} [options] The options for the `Duplex` constructor + * @return {Duplex} The duplex stream + * @public + */ +function createWebSocketStream(ws, options) { + let terminateOnDestroy = true; + + const duplex = new Duplex({ + ...options, + autoDestroy: false, + emitClose: false, + objectMode: false, + writableObjectMode: false + }); + + ws.on('message', function message(msg, isBinary) { + const data = + !isBinary && duplex._readableState.objectMode ? msg.toString() : msg; + + if (!duplex.push(data)) ws.pause(); + }); + + ws.once('error', function error(err) { + if (duplex.destroyed) return; + + // Prevent `ws.terminate()` from being called by `duplex._destroy()`. + // + // - If the `'error'` event is emitted before the `'open'` event, then + // `ws.terminate()` is a noop as no socket is assigned. + // - Otherwise, the error is re-emitted by the listener of the `'error'` + // event of the `Receiver` object. The listener already closes the + // connection by calling `ws.close()`. This allows a close frame to be + // sent to the other peer. If `ws.terminate()` is called right after this, + // then the close frame might not be sent. + terminateOnDestroy = false; + duplex.destroy(err); + }); + + ws.once('close', function close() { + if (duplex.destroyed) return; + + duplex.push(null); + }); + + duplex._destroy = function (err, callback) { + if (ws.readyState === ws.CLOSED) { + callback(err); + process.nextTick(emitClose, duplex); + return; + } + + let called = false; + + ws.once('error', function error(err) { + called = true; + callback(err); + }); + + ws.once('close', function close() { + if (!called) callback(err); + process.nextTick(emitClose, duplex); + }); + + if (terminateOnDestroy) ws.terminate(); + }; + + duplex._final = function (callback) { + if (ws.readyState === ws.CONNECTING) { + ws.once('open', function open() { + duplex._final(callback); + }); + return; + } + + // If the value of the `_socket` property is `null` it means that `ws` is a + // client websocket and the handshake failed. In fact, when this happens, a + // socket is never assigned to the websocket. Wait for the `'error'` event + // that will be emitted by the websocket. + if (ws._socket === null) return; + + if (ws._socket._writableState.finished) { + callback(); + if (duplex._readableState.endEmitted) duplex.destroy(); + } else { + ws._socket.once('finish', function finish() { + // `duplex` is not destroyed here because the `'end'` event will be + // emitted on `duplex` after this `'finish'` event. The EOF signaling + // `null` chunk is, in fact, pushed when the websocket emits `'close'`. + callback(); + }); + ws.close(); + } + }; + + duplex._read = function () { + if (ws.isPaused) ws.resume(); + }; + + duplex._write = function (chunk, encoding, callback) { + if (ws.readyState === ws.CONNECTING) { + ws.once('open', function open() { + duplex._write(chunk, encoding, callback); + }); + return; + } + + ws.send(chunk, callback); + }; + + duplex.on('end', duplexOnEnd); + duplex.on('error', duplexOnError); + return duplex; +} + +module.exports = createWebSocketStream; diff --git a/node_modules/ws/lib/subprotocol.js b/node_modules/ws/lib/subprotocol.js new file mode 100644 index 0000000..d4381e8 --- /dev/null +++ b/node_modules/ws/lib/subprotocol.js @@ -0,0 +1,62 @@ +'use strict'; + +const { tokenChars } = require('./validation'); + +/** + * Parses the `Sec-WebSocket-Protocol` header into a set of subprotocol names. + * + * @param {String} header The field value of the header + * @return {Set} The subprotocol names + * @public + */ +function parse(header) { + const protocols = new Set(); + let start = -1; + let end = -1; + let i = 0; + + for (i; i < header.length; i++) { + const code = header.charCodeAt(i); + + if (end === -1 && tokenChars[code] === 1) { + if (start === -1) start = i; + } else if ( + i !== 0 && + (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */ + ) { + if (end === -1 && start !== -1) end = i; + } else if (code === 0x2c /* ',' */) { + if (start === -1) { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + + if (end === -1) end = i; + + const protocol = header.slice(start, end); + + if (protocols.has(protocol)) { + throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`); + } + + protocols.add(protocol); + start = end = -1; + } else { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + } + + if (start === -1 || end !== -1) { + throw new SyntaxError('Unexpected end of input'); + } + + const protocol = header.slice(start, i); + + if (protocols.has(protocol)) { + throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`); + } + + protocols.add(protocol); + return protocols; +} + +module.exports = { parse }; diff --git a/node_modules/ws/lib/validation.js b/node_modules/ws/lib/validation.js new file mode 100644 index 0000000..4a2e68d --- /dev/null +++ b/node_modules/ws/lib/validation.js @@ -0,0 +1,152 @@ +'use strict'; + +const { isUtf8 } = require('buffer'); + +const { hasBlob } = require('./constants'); + +// +// Allowed token characters: +// +// '!', '#', '$', '%', '&', ''', '*', '+', '-', +// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~' +// +// tokenChars[32] === 0 // ' ' +// tokenChars[33] === 1 // '!' +// tokenChars[34] === 0 // '"' +// ... +// +// prettier-ignore +const tokenChars = [ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15 + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31 + 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47 + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63 + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79 + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95 + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111 + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 // 112 - 127 +]; + +/** + * Checks if a status code is allowed in a close frame. + * + * @param {Number} code The status code + * @return {Boolean} `true` if the status code is valid, else `false` + * @public + */ +function isValidStatusCode(code) { + return ( + (code >= 1000 && + code <= 1014 && + code !== 1004 && + code !== 1005 && + code !== 1006) || + (code >= 3000 && code <= 4999) + ); +} + +/** + * Checks if a given buffer contains only correct UTF-8. + * Ported from https://www.cl.cam.ac.uk/%7Emgk25/ucs/utf8_check.c by + * Markus Kuhn. + * + * @param {Buffer} buf The buffer to check + * @return {Boolean} `true` if `buf` contains only correct UTF-8, else `false` + * @public + */ +function _isValidUTF8(buf) { + const len = buf.length; + let i = 0; + + while (i < len) { + if ((buf[i] & 0x80) === 0) { + // 0xxxxxxx + i++; + } else if ((buf[i] & 0xe0) === 0xc0) { + // 110xxxxx 10xxxxxx + if ( + i + 1 === len || + (buf[i + 1] & 0xc0) !== 0x80 || + (buf[i] & 0xfe) === 0xc0 // Overlong + ) { + return false; + } + + i += 2; + } else if ((buf[i] & 0xf0) === 0xe0) { + // 1110xxxx 10xxxxxx 10xxxxxx + if ( + i + 2 >= len || + (buf[i + 1] & 0xc0) !== 0x80 || + (buf[i + 2] & 0xc0) !== 0x80 || + (buf[i] === 0xe0 && (buf[i + 1] & 0xe0) === 0x80) || // Overlong + (buf[i] === 0xed && (buf[i + 1] & 0xe0) === 0xa0) // Surrogate (U+D800 - U+DFFF) + ) { + return false; + } + + i += 3; + } else if ((buf[i] & 0xf8) === 0xf0) { + // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx + if ( + i + 3 >= len || + (buf[i + 1] & 0xc0) !== 0x80 || + (buf[i + 2] & 0xc0) !== 0x80 || + (buf[i + 3] & 0xc0) !== 0x80 || + (buf[i] === 0xf0 && (buf[i + 1] & 0xf0) === 0x80) || // Overlong + (buf[i] === 0xf4 && buf[i + 1] > 0x8f) || + buf[i] > 0xf4 // > U+10FFFF + ) { + return false; + } + + i += 4; + } else { + return false; + } + } + + return true; +} + +/** + * Determines whether a value is a `Blob`. + * + * @param {*} value The value to be tested + * @return {Boolean} `true` if `value` is a `Blob`, else `false` + * @private + */ +function isBlob(value) { + return ( + hasBlob && + typeof value === 'object' && + typeof value.arrayBuffer === 'function' && + typeof value.type === 'string' && + typeof value.stream === 'function' && + (value[Symbol.toStringTag] === 'Blob' || + value[Symbol.toStringTag] === 'File') + ); +} + +module.exports = { + isBlob, + isValidStatusCode, + isValidUTF8: _isValidUTF8, + tokenChars +}; + +if (isUtf8) { + module.exports.isValidUTF8 = function (buf) { + return buf.length < 24 ? _isValidUTF8(buf) : isUtf8(buf); + }; +} /* istanbul ignore else */ else if (!process.env.WS_NO_UTF_8_VALIDATE) { + try { + const isValidUTF8 = require('utf-8-validate'); + + module.exports.isValidUTF8 = function (buf) { + return buf.length < 32 ? _isValidUTF8(buf) : isValidUTF8(buf); + }; + } catch (e) { + // Continue regardless of the error. + } +} diff --git a/node_modules/ws/lib/websocket-server.js b/node_modules/ws/lib/websocket-server.js new file mode 100644 index 0000000..67b52ff --- /dev/null +++ b/node_modules/ws/lib/websocket-server.js @@ -0,0 +1,540 @@ +/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Duplex$", "caughtErrors": "none" }] */ + +'use strict'; + +const EventEmitter = require('events'); +const http = require('http'); +const { Duplex } = require('stream'); +const { createHash } = require('crypto'); + +const extension = require('./extension'); +const PerMessageDeflate = require('./permessage-deflate'); +const subprotocol = require('./subprotocol'); +const WebSocket = require('./websocket'); +const { GUID, kWebSocket } = require('./constants'); + +const keyRegex = /^[+/0-9A-Za-z]{22}==$/; + +const RUNNING = 0; +const CLOSING = 1; +const CLOSED = 2; + +/** + * Class representing a WebSocket server. + * + * @extends EventEmitter + */ +class WebSocketServer extends EventEmitter { + /** + * Create a `WebSocketServer` instance. + * + * @param {Object} options Configuration options + * @param {Boolean} [options.allowSynchronousEvents=true] Specifies whether + * any of the `'message'`, `'ping'`, and `'pong'` events can be emitted + * multiple times in the same tick + * @param {Boolean} [options.autoPong=true] Specifies whether or not to + * automatically send a pong in response to a ping + * @param {Number} [options.backlog=511] The maximum length of the queue of + * pending connections + * @param {Boolean} [options.clientTracking=true] Specifies whether or not to + * track clients + * @param {Function} [options.handleProtocols] A hook to handle protocols + * @param {String} [options.host] The hostname where to bind the server + * @param {Number} [options.maxPayload=104857600] The maximum allowed message + * size + * @param {Boolean} [options.noServer=false] Enable no server mode + * @param {String} [options.path] Accept only connections matching this path + * @param {(Boolean|Object)} [options.perMessageDeflate=false] Enable/disable + * permessage-deflate + * @param {Number} [options.port] The port where to bind the server + * @param {(http.Server|https.Server)} [options.server] A pre-created HTTP/S + * server to use + * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or + * not to skip UTF-8 validation for text and close messages + * @param {Function} [options.verifyClient] A hook to reject connections + * @param {Function} [options.WebSocket=WebSocket] Specifies the `WebSocket` + * class to use. It must be the `WebSocket` class or class that extends it + * @param {Function} [callback] A listener for the `listening` event + */ + constructor(options, callback) { + super(); + + options = { + allowSynchronousEvents: true, + autoPong: true, + maxPayload: 100 * 1024 * 1024, + skipUTF8Validation: false, + perMessageDeflate: false, + handleProtocols: null, + clientTracking: true, + verifyClient: null, + noServer: false, + backlog: null, // use default (511 as implemented in net.js) + server: null, + host: null, + path: null, + port: null, + WebSocket, + ...options + }; + + if ( + (options.port == null && !options.server && !options.noServer) || + (options.port != null && (options.server || options.noServer)) || + (options.server && options.noServer) + ) { + throw new TypeError( + 'One and only one of the "port", "server", or "noServer" options ' + + 'must be specified' + ); + } + + if (options.port != null) { + this._server = http.createServer((req, res) => { + const body = http.STATUS_CODES[426]; + + res.writeHead(426, { + 'Content-Length': body.length, + 'Content-Type': 'text/plain' + }); + res.end(body); + }); + this._server.listen( + options.port, + options.host, + options.backlog, + callback + ); + } else if (options.server) { + this._server = options.server; + } + + if (this._server) { + const emitConnection = this.emit.bind(this, 'connection'); + + this._removeListeners = addListeners(this._server, { + listening: this.emit.bind(this, 'listening'), + error: this.emit.bind(this, 'error'), + upgrade: (req, socket, head) => { + this.handleUpgrade(req, socket, head, emitConnection); + } + }); + } + + if (options.perMessageDeflate === true) options.perMessageDeflate = {}; + if (options.clientTracking) { + this.clients = new Set(); + this._shouldEmitClose = false; + } + + this.options = options; + this._state = RUNNING; + } + + /** + * Returns the bound address, the address family name, and port of the server + * as reported by the operating system if listening on an IP socket. + * If the server is listening on a pipe or UNIX domain socket, the name is + * returned as a string. + * + * @return {(Object|String|null)} The address of the server + * @public + */ + address() { + if (this.options.noServer) { + throw new Error('The server is operating in "noServer" mode'); + } + + if (!this._server) return null; + return this._server.address(); + } + + /** + * Stop the server from accepting new connections and emit the `'close'` event + * when all existing connections are closed. + * + * @param {Function} [cb] A one-time listener for the `'close'` event + * @public + */ + close(cb) { + if (this._state === CLOSED) { + if (cb) { + this.once('close', () => { + cb(new Error('The server is not running')); + }); + } + + process.nextTick(emitClose, this); + return; + } + + if (cb) this.once('close', cb); + + if (this._state === CLOSING) return; + this._state = CLOSING; + + if (this.options.noServer || this.options.server) { + if (this._server) { + this._removeListeners(); + this._removeListeners = this._server = null; + } + + if (this.clients) { + if (!this.clients.size) { + process.nextTick(emitClose, this); + } else { + this._shouldEmitClose = true; + } + } else { + process.nextTick(emitClose, this); + } + } else { + const server = this._server; + + this._removeListeners(); + this._removeListeners = this._server = null; + + // + // The HTTP/S server was created internally. Close it, and rely on its + // `'close'` event. + // + server.close(() => { + emitClose(this); + }); + } + } + + /** + * See if a given request should be handled by this server instance. + * + * @param {http.IncomingMessage} req Request object to inspect + * @return {Boolean} `true` if the request is valid, else `false` + * @public + */ + shouldHandle(req) { + if (this.options.path) { + const index = req.url.indexOf('?'); + const pathname = index !== -1 ? req.url.slice(0, index) : req.url; + + if (pathname !== this.options.path) return false; + } + + return true; + } + + /** + * Handle a HTTP Upgrade request. + * + * @param {http.IncomingMessage} req The request object + * @param {Duplex} socket The network socket between the server and client + * @param {Buffer} head The first packet of the upgraded stream + * @param {Function} cb Callback + * @public + */ + handleUpgrade(req, socket, head, cb) { + socket.on('error', socketOnError); + + const key = req.headers['sec-websocket-key']; + const upgrade = req.headers.upgrade; + const version = +req.headers['sec-websocket-version']; + + if (req.method !== 'GET') { + const message = 'Invalid HTTP method'; + abortHandshakeOrEmitwsClientError(this, req, socket, 405, message); + return; + } + + if (upgrade === undefined || upgrade.toLowerCase() !== 'websocket') { + const message = 'Invalid Upgrade header'; + abortHandshakeOrEmitwsClientError(this, req, socket, 400, message); + return; + } + + if (key === undefined || !keyRegex.test(key)) { + const message = 'Missing or invalid Sec-WebSocket-Key header'; + abortHandshakeOrEmitwsClientError(this, req, socket, 400, message); + return; + } + + if (version !== 8 && version !== 13) { + const message = 'Missing or invalid Sec-WebSocket-Version header'; + abortHandshakeOrEmitwsClientError(this, req, socket, 400, message); + return; + } + + if (!this.shouldHandle(req)) { + abortHandshake(socket, 400); + return; + } + + const secWebSocketProtocol = req.headers['sec-websocket-protocol']; + let protocols = new Set(); + + if (secWebSocketProtocol !== undefined) { + try { + protocols = subprotocol.parse(secWebSocketProtocol); + } catch (err) { + const message = 'Invalid Sec-WebSocket-Protocol header'; + abortHandshakeOrEmitwsClientError(this, req, socket, 400, message); + return; + } + } + + const secWebSocketExtensions = req.headers['sec-websocket-extensions']; + const extensions = {}; + + if ( + this.options.perMessageDeflate && + secWebSocketExtensions !== undefined + ) { + const perMessageDeflate = new PerMessageDeflate( + this.options.perMessageDeflate, + true, + this.options.maxPayload + ); + + try { + const offers = extension.parse(secWebSocketExtensions); + + if (offers[PerMessageDeflate.extensionName]) { + perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]); + extensions[PerMessageDeflate.extensionName] = perMessageDeflate; + } + } catch (err) { + const message = + 'Invalid or unacceptable Sec-WebSocket-Extensions header'; + abortHandshakeOrEmitwsClientError(this, req, socket, 400, message); + return; + } + } + + // + // Optionally call external client verification handler. + // + if (this.options.verifyClient) { + const info = { + origin: + req.headers[`${version === 8 ? 'sec-websocket-origin' : 'origin'}`], + secure: !!(req.socket.authorized || req.socket.encrypted), + req + }; + + if (this.options.verifyClient.length === 2) { + this.options.verifyClient(info, (verified, code, message, headers) => { + if (!verified) { + return abortHandshake(socket, code || 401, message, headers); + } + + this.completeUpgrade( + extensions, + key, + protocols, + req, + socket, + head, + cb + ); + }); + return; + } + + if (!this.options.verifyClient(info)) return abortHandshake(socket, 401); + } + + this.completeUpgrade(extensions, key, protocols, req, socket, head, cb); + } + + /** + * Upgrade the connection to WebSocket. + * + * @param {Object} extensions The accepted extensions + * @param {String} key The value of the `Sec-WebSocket-Key` header + * @param {Set} protocols The subprotocols + * @param {http.IncomingMessage} req The request object + * @param {Duplex} socket The network socket between the server and client + * @param {Buffer} head The first packet of the upgraded stream + * @param {Function} cb Callback + * @throws {Error} If called more than once with the same socket + * @private + */ + completeUpgrade(extensions, key, protocols, req, socket, head, cb) { + // + // Destroy the socket if the client has already sent a FIN packet. + // + if (!socket.readable || !socket.writable) return socket.destroy(); + + if (socket[kWebSocket]) { + throw new Error( + 'server.handleUpgrade() was called more than once with the same ' + + 'socket, possibly due to a misconfiguration' + ); + } + + if (this._state > RUNNING) return abortHandshake(socket, 503); + + const digest = createHash('sha1') + .update(key + GUID) + .digest('base64'); + + const headers = [ + 'HTTP/1.1 101 Switching Protocols', + 'Upgrade: websocket', + 'Connection: Upgrade', + `Sec-WebSocket-Accept: ${digest}` + ]; + + const ws = new this.options.WebSocket(null, undefined, this.options); + + if (protocols.size) { + // + // Optionally call external protocol selection handler. + // + const protocol = this.options.handleProtocols + ? this.options.handleProtocols(protocols, req) + : protocols.values().next().value; + + if (protocol) { + headers.push(`Sec-WebSocket-Protocol: ${protocol}`); + ws._protocol = protocol; + } + } + + if (extensions[PerMessageDeflate.extensionName]) { + const params = extensions[PerMessageDeflate.extensionName].params; + const value = extension.format({ + [PerMessageDeflate.extensionName]: [params] + }); + headers.push(`Sec-WebSocket-Extensions: ${value}`); + ws._extensions = extensions; + } + + // + // Allow external modification/inspection of handshake headers. + // + this.emit('headers', headers, req); + + socket.write(headers.concat('\r\n').join('\r\n')); + socket.removeListener('error', socketOnError); + + ws.setSocket(socket, head, { + allowSynchronousEvents: this.options.allowSynchronousEvents, + maxPayload: this.options.maxPayload, + skipUTF8Validation: this.options.skipUTF8Validation + }); + + if (this.clients) { + this.clients.add(ws); + ws.on('close', () => { + this.clients.delete(ws); + + if (this._shouldEmitClose && !this.clients.size) { + process.nextTick(emitClose, this); + } + }); + } + + cb(ws, req); + } +} + +module.exports = WebSocketServer; + +/** + * Add event listeners on an `EventEmitter` using a map of + * pairs. + * + * @param {EventEmitter} server The event emitter + * @param {Object.} map The listeners to add + * @return {Function} A function that will remove the added listeners when + * called + * @private + */ +function addListeners(server, map) { + for (const event of Object.keys(map)) server.on(event, map[event]); + + return function removeListeners() { + for (const event of Object.keys(map)) { + server.removeListener(event, map[event]); + } + }; +} + +/** + * Emit a `'close'` event on an `EventEmitter`. + * + * @param {EventEmitter} server The event emitter + * @private + */ +function emitClose(server) { + server._state = CLOSED; + server.emit('close'); +} + +/** + * Handle socket errors. + * + * @private + */ +function socketOnError() { + this.destroy(); +} + +/** + * Close the connection when preconditions are not fulfilled. + * + * @param {Duplex} socket The socket of the upgrade request + * @param {Number} code The HTTP response status code + * @param {String} [message] The HTTP response body + * @param {Object} [headers] Additional HTTP response headers + * @private + */ +function abortHandshake(socket, code, message, headers) { + // + // The socket is writable unless the user destroyed or ended it before calling + // `server.handleUpgrade()` or in the `verifyClient` function, which is a user + // error. Handling this does not make much sense as the worst that can happen + // is that some of the data written by the user might be discarded due to the + // call to `socket.end()` below, which triggers an `'error'` event that in + // turn causes the socket to be destroyed. + // + message = message || http.STATUS_CODES[code]; + headers = { + Connection: 'close', + 'Content-Type': 'text/html', + 'Content-Length': Buffer.byteLength(message), + ...headers + }; + + socket.once('finish', socket.destroy); + + socket.end( + `HTTP/1.1 ${code} ${http.STATUS_CODES[code]}\r\n` + + Object.keys(headers) + .map((h) => `${h}: ${headers[h]}`) + .join('\r\n') + + '\r\n\r\n' + + message + ); +} + +/** + * Emit a `'wsClientError'` event on a `WebSocketServer` if there is at least + * one listener for it, otherwise call `abortHandshake()`. + * + * @param {WebSocketServer} server The WebSocket server + * @param {http.IncomingMessage} req The request object + * @param {Duplex} socket The socket of the upgrade request + * @param {Number} code The HTTP response status code + * @param {String} message The HTTP response body + * @private + */ +function abortHandshakeOrEmitwsClientError(server, req, socket, code, message) { + if (server.listenerCount('wsClientError')) { + const err = new Error(message); + Error.captureStackTrace(err, abortHandshakeOrEmitwsClientError); + + server.emit('wsClientError', err, socket, req); + } else { + abortHandshake(socket, code, message); + } +} diff --git a/node_modules/ws/lib/websocket.js b/node_modules/ws/lib/websocket.js new file mode 100644 index 0000000..7fb4029 --- /dev/null +++ b/node_modules/ws/lib/websocket.js @@ -0,0 +1,1388 @@ +/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Duplex|Readable$", "caughtErrors": "none" }] */ + +'use strict'; + +const EventEmitter = require('events'); +const https = require('https'); +const http = require('http'); +const net = require('net'); +const tls = require('tls'); +const { randomBytes, createHash } = require('crypto'); +const { Duplex, Readable } = require('stream'); +const { URL } = require('url'); + +const PerMessageDeflate = require('./permessage-deflate'); +const Receiver = require('./receiver'); +const Sender = require('./sender'); +const { isBlob } = require('./validation'); + +const { + BINARY_TYPES, + EMPTY_BUFFER, + GUID, + kForOnEventAttribute, + kListener, + kStatusCode, + kWebSocket, + NOOP +} = require('./constants'); +const { + EventTarget: { addEventListener, removeEventListener } +} = require('./event-target'); +const { format, parse } = require('./extension'); +const { toBuffer } = require('./buffer-util'); + +const closeTimeout = 30 * 1000; +const kAborted = Symbol('kAborted'); +const protocolVersions = [8, 13]; +const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED']; +const subprotocolRegex = /^[!#$%&'*+\-.0-9A-Z^_`|a-z~]+$/; + +/** + * Class representing a WebSocket. + * + * @extends EventEmitter + */ +class WebSocket extends EventEmitter { + /** + * Create a new `WebSocket`. + * + * @param {(String|URL)} address The URL to which to connect + * @param {(String|String[])} [protocols] The subprotocols + * @param {Object} [options] Connection options + */ + constructor(address, protocols, options) { + super(); + + this._binaryType = BINARY_TYPES[0]; + this._closeCode = 1006; + this._closeFrameReceived = false; + this._closeFrameSent = false; + this._closeMessage = EMPTY_BUFFER; + this._closeTimer = null; + this._errorEmitted = false; + this._extensions = {}; + this._paused = false; + this._protocol = ''; + this._readyState = WebSocket.CONNECTING; + this._receiver = null; + this._sender = null; + this._socket = null; + + if (address !== null) { + this._bufferedAmount = 0; + this._isServer = false; + this._redirects = 0; + + if (protocols === undefined) { + protocols = []; + } else if (!Array.isArray(protocols)) { + if (typeof protocols === 'object' && protocols !== null) { + options = protocols; + protocols = []; + } else { + protocols = [protocols]; + } + } + + initAsClient(this, address, protocols, options); + } else { + this._autoPong = options.autoPong; + this._isServer = true; + } + } + + /** + * For historical reasons, the custom "nodebuffer" type is used by the default + * instead of "blob". + * + * @type {String} + */ + get binaryType() { + return this._binaryType; + } + + set binaryType(type) { + if (!BINARY_TYPES.includes(type)) return; + + this._binaryType = type; + + // + // Allow to change `binaryType` on the fly. + // + if (this._receiver) this._receiver._binaryType = type; + } + + /** + * @type {Number} + */ + get bufferedAmount() { + if (!this._socket) return this._bufferedAmount; + + return this._socket._writableState.length + this._sender._bufferedBytes; + } + + /** + * @type {String} + */ + get extensions() { + return Object.keys(this._extensions).join(); + } + + /** + * @type {Boolean} + */ + get isPaused() { + return this._paused; + } + + /** + * @type {Function} + */ + /* istanbul ignore next */ + get onclose() { + return null; + } + + /** + * @type {Function} + */ + /* istanbul ignore next */ + get onerror() { + return null; + } + + /** + * @type {Function} + */ + /* istanbul ignore next */ + get onopen() { + return null; + } + + /** + * @type {Function} + */ + /* istanbul ignore next */ + get onmessage() { + return null; + } + + /** + * @type {String} + */ + get protocol() { + return this._protocol; + } + + /** + * @type {Number} + */ + get readyState() { + return this._readyState; + } + + /** + * @type {String} + */ + get url() { + return this._url; + } + + /** + * Set up the socket and the internal resources. + * + * @param {Duplex} socket The network socket between the server and client + * @param {Buffer} head The first packet of the upgraded stream + * @param {Object} options Options object + * @param {Boolean} [options.allowSynchronousEvents=false] Specifies whether + * any of the `'message'`, `'ping'`, and `'pong'` events can be emitted + * multiple times in the same tick + * @param {Function} [options.generateMask] The function used to generate the + * masking key + * @param {Number} [options.maxPayload=0] The maximum allowed message size + * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or + * not to skip UTF-8 validation for text and close messages + * @private + */ + setSocket(socket, head, options) { + const receiver = new Receiver({ + allowSynchronousEvents: options.allowSynchronousEvents, + binaryType: this.binaryType, + extensions: this._extensions, + isServer: this._isServer, + maxPayload: options.maxPayload, + skipUTF8Validation: options.skipUTF8Validation + }); + + const sender = new Sender(socket, this._extensions, options.generateMask); + + this._receiver = receiver; + this._sender = sender; + this._socket = socket; + + receiver[kWebSocket] = this; + sender[kWebSocket] = this; + socket[kWebSocket] = this; + + receiver.on('conclude', receiverOnConclude); + receiver.on('drain', receiverOnDrain); + receiver.on('error', receiverOnError); + receiver.on('message', receiverOnMessage); + receiver.on('ping', receiverOnPing); + receiver.on('pong', receiverOnPong); + + sender.onerror = senderOnError; + + // + // These methods may not be available if `socket` is just a `Duplex`. + // + if (socket.setTimeout) socket.setTimeout(0); + if (socket.setNoDelay) socket.setNoDelay(); + + if (head.length > 0) socket.unshift(head); + + socket.on('close', socketOnClose); + socket.on('data', socketOnData); + socket.on('end', socketOnEnd); + socket.on('error', socketOnError); + + this._readyState = WebSocket.OPEN; + this.emit('open'); + } + + /** + * Emit the `'close'` event. + * + * @private + */ + emitClose() { + if (!this._socket) { + this._readyState = WebSocket.CLOSED; + this.emit('close', this._closeCode, this._closeMessage); + return; + } + + if (this._extensions[PerMessageDeflate.extensionName]) { + this._extensions[PerMessageDeflate.extensionName].cleanup(); + } + + this._receiver.removeAllListeners(); + this._readyState = WebSocket.CLOSED; + this.emit('close', this._closeCode, this._closeMessage); + } + + /** + * Start a closing handshake. + * + * +----------+ +-----------+ +----------+ + * - - -|ws.close()|-->|close frame|-->|ws.close()|- - - + * | +----------+ +-----------+ +----------+ | + * +----------+ +-----------+ | + * CLOSING |ws.close()|<--|close frame|<--+-----+ CLOSING + * +----------+ +-----------+ | + * | | | +---+ | + * +------------------------+-->|fin| - - - - + * | +---+ | +---+ + * - - - - -|fin|<---------------------+ + * +---+ + * + * @param {Number} [code] Status code explaining why the connection is closing + * @param {(String|Buffer)} [data] The reason why the connection is + * closing + * @public + */ + close(code, data) { + if (this.readyState === WebSocket.CLOSED) return; + if (this.readyState === WebSocket.CONNECTING) { + const msg = 'WebSocket was closed before the connection was established'; + abortHandshake(this, this._req, msg); + return; + } + + if (this.readyState === WebSocket.CLOSING) { + if ( + this._closeFrameSent && + (this._closeFrameReceived || this._receiver._writableState.errorEmitted) + ) { + this._socket.end(); + } + + return; + } + + this._readyState = WebSocket.CLOSING; + this._sender.close(code, data, !this._isServer, (err) => { + // + // This error is handled by the `'error'` listener on the socket. We only + // want to know if the close frame has been sent here. + // + if (err) return; + + this._closeFrameSent = true; + + if ( + this._closeFrameReceived || + this._receiver._writableState.errorEmitted + ) { + this._socket.end(); + } + }); + + setCloseTimer(this); + } + + /** + * Pause the socket. + * + * @public + */ + pause() { + if ( + this.readyState === WebSocket.CONNECTING || + this.readyState === WebSocket.CLOSED + ) { + return; + } + + this._paused = true; + this._socket.pause(); + } + + /** + * Send a ping. + * + * @param {*} [data] The data to send + * @param {Boolean} [mask] Indicates whether or not to mask `data` + * @param {Function} [cb] Callback which is executed when the ping is sent + * @public + */ + ping(data, mask, cb) { + if (this.readyState === WebSocket.CONNECTING) { + throw new Error('WebSocket is not open: readyState 0 (CONNECTING)'); + } + + if (typeof data === 'function') { + cb = data; + data = mask = undefined; + } else if (typeof mask === 'function') { + cb = mask; + mask = undefined; + } + + if (typeof data === 'number') data = data.toString(); + + if (this.readyState !== WebSocket.OPEN) { + sendAfterClose(this, data, cb); + return; + } + + if (mask === undefined) mask = !this._isServer; + this._sender.ping(data || EMPTY_BUFFER, mask, cb); + } + + /** + * Send a pong. + * + * @param {*} [data] The data to send + * @param {Boolean} [mask] Indicates whether or not to mask `data` + * @param {Function} [cb] Callback which is executed when the pong is sent + * @public + */ + pong(data, mask, cb) { + if (this.readyState === WebSocket.CONNECTING) { + throw new Error('WebSocket is not open: readyState 0 (CONNECTING)'); + } + + if (typeof data === 'function') { + cb = data; + data = mask = undefined; + } else if (typeof mask === 'function') { + cb = mask; + mask = undefined; + } + + if (typeof data === 'number') data = data.toString(); + + if (this.readyState !== WebSocket.OPEN) { + sendAfterClose(this, data, cb); + return; + } + + if (mask === undefined) mask = !this._isServer; + this._sender.pong(data || EMPTY_BUFFER, mask, cb); + } + + /** + * Resume the socket. + * + * @public + */ + resume() { + if ( + this.readyState === WebSocket.CONNECTING || + this.readyState === WebSocket.CLOSED + ) { + return; + } + + this._paused = false; + if (!this._receiver._writableState.needDrain) this._socket.resume(); + } + + /** + * Send a data message. + * + * @param {*} data The message to send + * @param {Object} [options] Options object + * @param {Boolean} [options.binary] Specifies whether `data` is binary or + * text + * @param {Boolean} [options.compress] Specifies whether or not to compress + * `data` + * @param {Boolean} [options.fin=true] Specifies whether the fragment is the + * last one + * @param {Boolean} [options.mask] Specifies whether or not to mask `data` + * @param {Function} [cb] Callback which is executed when data is written out + * @public + */ + send(data, options, cb) { + if (this.readyState === WebSocket.CONNECTING) { + throw new Error('WebSocket is not open: readyState 0 (CONNECTING)'); + } + + if (typeof options === 'function') { + cb = options; + options = {}; + } + + if (typeof data === 'number') data = data.toString(); + + if (this.readyState !== WebSocket.OPEN) { + sendAfterClose(this, data, cb); + return; + } + + const opts = { + binary: typeof data !== 'string', + mask: !this._isServer, + compress: true, + fin: true, + ...options + }; + + if (!this._extensions[PerMessageDeflate.extensionName]) { + opts.compress = false; + } + + this._sender.send(data || EMPTY_BUFFER, opts, cb); + } + + /** + * Forcibly close the connection. + * + * @public + */ + terminate() { + if (this.readyState === WebSocket.CLOSED) return; + if (this.readyState === WebSocket.CONNECTING) { + const msg = 'WebSocket was closed before the connection was established'; + abortHandshake(this, this._req, msg); + return; + } + + if (this._socket) { + this._readyState = WebSocket.CLOSING; + this._socket.destroy(); + } + } +} + +/** + * @constant {Number} CONNECTING + * @memberof WebSocket + */ +Object.defineProperty(WebSocket, 'CONNECTING', { + enumerable: true, + value: readyStates.indexOf('CONNECTING') +}); + +/** + * @constant {Number} CONNECTING + * @memberof WebSocket.prototype + */ +Object.defineProperty(WebSocket.prototype, 'CONNECTING', { + enumerable: true, + value: readyStates.indexOf('CONNECTING') +}); + +/** + * @constant {Number} OPEN + * @memberof WebSocket + */ +Object.defineProperty(WebSocket, 'OPEN', { + enumerable: true, + value: readyStates.indexOf('OPEN') +}); + +/** + * @constant {Number} OPEN + * @memberof WebSocket.prototype + */ +Object.defineProperty(WebSocket.prototype, 'OPEN', { + enumerable: true, + value: readyStates.indexOf('OPEN') +}); + +/** + * @constant {Number} CLOSING + * @memberof WebSocket + */ +Object.defineProperty(WebSocket, 'CLOSING', { + enumerable: true, + value: readyStates.indexOf('CLOSING') +}); + +/** + * @constant {Number} CLOSING + * @memberof WebSocket.prototype + */ +Object.defineProperty(WebSocket.prototype, 'CLOSING', { + enumerable: true, + value: readyStates.indexOf('CLOSING') +}); + +/** + * @constant {Number} CLOSED + * @memberof WebSocket + */ +Object.defineProperty(WebSocket, 'CLOSED', { + enumerable: true, + value: readyStates.indexOf('CLOSED') +}); + +/** + * @constant {Number} CLOSED + * @memberof WebSocket.prototype + */ +Object.defineProperty(WebSocket.prototype, 'CLOSED', { + enumerable: true, + value: readyStates.indexOf('CLOSED') +}); + +[ + 'binaryType', + 'bufferedAmount', + 'extensions', + 'isPaused', + 'protocol', + 'readyState', + 'url' +].forEach((property) => { + Object.defineProperty(WebSocket.prototype, property, { enumerable: true }); +}); + +// +// Add the `onopen`, `onerror`, `onclose`, and `onmessage` attributes. +// See https://html.spec.whatwg.org/multipage/comms.html#the-websocket-interface +// +['open', 'error', 'close', 'message'].forEach((method) => { + Object.defineProperty(WebSocket.prototype, `on${method}`, { + enumerable: true, + get() { + for (const listener of this.listeners(method)) { + if (listener[kForOnEventAttribute]) return listener[kListener]; + } + + return null; + }, + set(handler) { + for (const listener of this.listeners(method)) { + if (listener[kForOnEventAttribute]) { + this.removeListener(method, listener); + break; + } + } + + if (typeof handler !== 'function') return; + + this.addEventListener(method, handler, { + [kForOnEventAttribute]: true + }); + } + }); +}); + +WebSocket.prototype.addEventListener = addEventListener; +WebSocket.prototype.removeEventListener = removeEventListener; + +module.exports = WebSocket; + +/** + * Initialize a WebSocket client. + * + * @param {WebSocket} websocket The client to initialize + * @param {(String|URL)} address The URL to which to connect + * @param {Array} protocols The subprotocols + * @param {Object} [options] Connection options + * @param {Boolean} [options.allowSynchronousEvents=true] Specifies whether any + * of the `'message'`, `'ping'`, and `'pong'` events can be emitted multiple + * times in the same tick + * @param {Boolean} [options.autoPong=true] Specifies whether or not to + * automatically send a pong in response to a ping + * @param {Function} [options.finishRequest] A function which can be used to + * customize the headers of each http request before it is sent + * @param {Boolean} [options.followRedirects=false] Whether or not to follow + * redirects + * @param {Function} [options.generateMask] The function used to generate the + * masking key + * @param {Number} [options.handshakeTimeout] Timeout in milliseconds for the + * handshake request + * @param {Number} [options.maxPayload=104857600] The maximum allowed message + * size + * @param {Number} [options.maxRedirects=10] The maximum number of redirects + * allowed + * @param {String} [options.origin] Value of the `Origin` or + * `Sec-WebSocket-Origin` header + * @param {(Boolean|Object)} [options.perMessageDeflate=true] Enable/disable + * permessage-deflate + * @param {Number} [options.protocolVersion=13] Value of the + * `Sec-WebSocket-Version` header + * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or + * not to skip UTF-8 validation for text and close messages + * @private + */ +function initAsClient(websocket, address, protocols, options) { + const opts = { + allowSynchronousEvents: true, + autoPong: true, + protocolVersion: protocolVersions[1], + maxPayload: 100 * 1024 * 1024, + skipUTF8Validation: false, + perMessageDeflate: true, + followRedirects: false, + maxRedirects: 10, + ...options, + socketPath: undefined, + hostname: undefined, + protocol: undefined, + timeout: undefined, + method: 'GET', + host: undefined, + path: undefined, + port: undefined + }; + + websocket._autoPong = opts.autoPong; + + if (!protocolVersions.includes(opts.protocolVersion)) { + throw new RangeError( + `Unsupported protocol version: ${opts.protocolVersion} ` + + `(supported versions: ${protocolVersions.join(', ')})` + ); + } + + let parsedUrl; + + if (address instanceof URL) { + parsedUrl = address; + } else { + try { + parsedUrl = new URL(address); + } catch (e) { + throw new SyntaxError(`Invalid URL: ${address}`); + } + } + + if (parsedUrl.protocol === 'http:') { + parsedUrl.protocol = 'ws:'; + } else if (parsedUrl.protocol === 'https:') { + parsedUrl.protocol = 'wss:'; + } + + websocket._url = parsedUrl.href; + + const isSecure = parsedUrl.protocol === 'wss:'; + const isIpcUrl = parsedUrl.protocol === 'ws+unix:'; + let invalidUrlMessage; + + if (parsedUrl.protocol !== 'ws:' && !isSecure && !isIpcUrl) { + invalidUrlMessage = + 'The URL\'s protocol must be one of "ws:", "wss:", ' + + '"http:", "https", or "ws+unix:"'; + } else if (isIpcUrl && !parsedUrl.pathname) { + invalidUrlMessage = "The URL's pathname is empty"; + } else if (parsedUrl.hash) { + invalidUrlMessage = 'The URL contains a fragment identifier'; + } + + if (invalidUrlMessage) { + const err = new SyntaxError(invalidUrlMessage); + + if (websocket._redirects === 0) { + throw err; + } else { + emitErrorAndClose(websocket, err); + return; + } + } + + const defaultPort = isSecure ? 443 : 80; + const key = randomBytes(16).toString('base64'); + const request = isSecure ? https.request : http.request; + const protocolSet = new Set(); + let perMessageDeflate; + + opts.createConnection = + opts.createConnection || (isSecure ? tlsConnect : netConnect); + opts.defaultPort = opts.defaultPort || defaultPort; + opts.port = parsedUrl.port || defaultPort; + opts.host = parsedUrl.hostname.startsWith('[') + ? parsedUrl.hostname.slice(1, -1) + : parsedUrl.hostname; + opts.headers = { + ...opts.headers, + 'Sec-WebSocket-Version': opts.protocolVersion, + 'Sec-WebSocket-Key': key, + Connection: 'Upgrade', + Upgrade: 'websocket' + }; + opts.path = parsedUrl.pathname + parsedUrl.search; + opts.timeout = opts.handshakeTimeout; + + if (opts.perMessageDeflate) { + perMessageDeflate = new PerMessageDeflate( + opts.perMessageDeflate !== true ? opts.perMessageDeflate : {}, + false, + opts.maxPayload + ); + opts.headers['Sec-WebSocket-Extensions'] = format({ + [PerMessageDeflate.extensionName]: perMessageDeflate.offer() + }); + } + if (protocols.length) { + for (const protocol of protocols) { + if ( + typeof protocol !== 'string' || + !subprotocolRegex.test(protocol) || + protocolSet.has(protocol) + ) { + throw new SyntaxError( + 'An invalid or duplicated subprotocol was specified' + ); + } + + protocolSet.add(protocol); + } + + opts.headers['Sec-WebSocket-Protocol'] = protocols.join(','); + } + if (opts.origin) { + if (opts.protocolVersion < 13) { + opts.headers['Sec-WebSocket-Origin'] = opts.origin; + } else { + opts.headers.Origin = opts.origin; + } + } + if (parsedUrl.username || parsedUrl.password) { + opts.auth = `${parsedUrl.username}:${parsedUrl.password}`; + } + + if (isIpcUrl) { + const parts = opts.path.split(':'); + + opts.socketPath = parts[0]; + opts.path = parts[1]; + } + + let req; + + if (opts.followRedirects) { + if (websocket._redirects === 0) { + websocket._originalIpc = isIpcUrl; + websocket._originalSecure = isSecure; + websocket._originalHostOrSocketPath = isIpcUrl + ? opts.socketPath + : parsedUrl.host; + + const headers = options && options.headers; + + // + // Shallow copy the user provided options so that headers can be changed + // without mutating the original object. + // + options = { ...options, headers: {} }; + + if (headers) { + for (const [key, value] of Object.entries(headers)) { + options.headers[key.toLowerCase()] = value; + } + } + } else if (websocket.listenerCount('redirect') === 0) { + const isSameHost = isIpcUrl + ? websocket._originalIpc + ? opts.socketPath === websocket._originalHostOrSocketPath + : false + : websocket._originalIpc + ? false + : parsedUrl.host === websocket._originalHostOrSocketPath; + + if (!isSameHost || (websocket._originalSecure && !isSecure)) { + // + // Match curl 7.77.0 behavior and drop the following headers. These + // headers are also dropped when following a redirect to a subdomain. + // + delete opts.headers.authorization; + delete opts.headers.cookie; + + if (!isSameHost) delete opts.headers.host; + + opts.auth = undefined; + } + } + + // + // Match curl 7.77.0 behavior and make the first `Authorization` header win. + // If the `Authorization` header is set, then there is nothing to do as it + // will take precedence. + // + if (opts.auth && !options.headers.authorization) { + options.headers.authorization = + 'Basic ' + Buffer.from(opts.auth).toString('base64'); + } + + req = websocket._req = request(opts); + + if (websocket._redirects) { + // + // Unlike what is done for the `'upgrade'` event, no early exit is + // triggered here if the user calls `websocket.close()` or + // `websocket.terminate()` from a listener of the `'redirect'` event. This + // is because the user can also call `request.destroy()` with an error + // before calling `websocket.close()` or `websocket.terminate()` and this + // would result in an error being emitted on the `request` object with no + // `'error'` event listeners attached. + // + websocket.emit('redirect', websocket.url, req); + } + } else { + req = websocket._req = request(opts); + } + + if (opts.timeout) { + req.on('timeout', () => { + abortHandshake(websocket, req, 'Opening handshake has timed out'); + }); + } + + req.on('error', (err) => { + if (req === null || req[kAborted]) return; + + req = websocket._req = null; + emitErrorAndClose(websocket, err); + }); + + req.on('response', (res) => { + const location = res.headers.location; + const statusCode = res.statusCode; + + if ( + location && + opts.followRedirects && + statusCode >= 300 && + statusCode < 400 + ) { + if (++websocket._redirects > opts.maxRedirects) { + abortHandshake(websocket, req, 'Maximum redirects exceeded'); + return; + } + + req.abort(); + + let addr; + + try { + addr = new URL(location, address); + } catch (e) { + const err = new SyntaxError(`Invalid URL: ${location}`); + emitErrorAndClose(websocket, err); + return; + } + + initAsClient(websocket, addr, protocols, options); + } else if (!websocket.emit('unexpected-response', req, res)) { + abortHandshake( + websocket, + req, + `Unexpected server response: ${res.statusCode}` + ); + } + }); + + req.on('upgrade', (res, socket, head) => { + websocket.emit('upgrade', res); + + // + // The user may have closed the connection from a listener of the + // `'upgrade'` event. + // + if (websocket.readyState !== WebSocket.CONNECTING) return; + + req = websocket._req = null; + + const upgrade = res.headers.upgrade; + + if (upgrade === undefined || upgrade.toLowerCase() !== 'websocket') { + abortHandshake(websocket, socket, 'Invalid Upgrade header'); + return; + } + + const digest = createHash('sha1') + .update(key + GUID) + .digest('base64'); + + if (res.headers['sec-websocket-accept'] !== digest) { + abortHandshake(websocket, socket, 'Invalid Sec-WebSocket-Accept header'); + return; + } + + const serverProt = res.headers['sec-websocket-protocol']; + let protError; + + if (serverProt !== undefined) { + if (!protocolSet.size) { + protError = 'Server sent a subprotocol but none was requested'; + } else if (!protocolSet.has(serverProt)) { + protError = 'Server sent an invalid subprotocol'; + } + } else if (protocolSet.size) { + protError = 'Server sent no subprotocol'; + } + + if (protError) { + abortHandshake(websocket, socket, protError); + return; + } + + if (serverProt) websocket._protocol = serverProt; + + const secWebSocketExtensions = res.headers['sec-websocket-extensions']; + + if (secWebSocketExtensions !== undefined) { + if (!perMessageDeflate) { + const message = + 'Server sent a Sec-WebSocket-Extensions header but no extension ' + + 'was requested'; + abortHandshake(websocket, socket, message); + return; + } + + let extensions; + + try { + extensions = parse(secWebSocketExtensions); + } catch (err) { + const message = 'Invalid Sec-WebSocket-Extensions header'; + abortHandshake(websocket, socket, message); + return; + } + + const extensionNames = Object.keys(extensions); + + if ( + extensionNames.length !== 1 || + extensionNames[0] !== PerMessageDeflate.extensionName + ) { + const message = 'Server indicated an extension that was not requested'; + abortHandshake(websocket, socket, message); + return; + } + + try { + perMessageDeflate.accept(extensions[PerMessageDeflate.extensionName]); + } catch (err) { + const message = 'Invalid Sec-WebSocket-Extensions header'; + abortHandshake(websocket, socket, message); + return; + } + + websocket._extensions[PerMessageDeflate.extensionName] = + perMessageDeflate; + } + + websocket.setSocket(socket, head, { + allowSynchronousEvents: opts.allowSynchronousEvents, + generateMask: opts.generateMask, + maxPayload: opts.maxPayload, + skipUTF8Validation: opts.skipUTF8Validation + }); + }); + + if (opts.finishRequest) { + opts.finishRequest(req, websocket); + } else { + req.end(); + } +} + +/** + * Emit the `'error'` and `'close'` events. + * + * @param {WebSocket} websocket The WebSocket instance + * @param {Error} The error to emit + * @private + */ +function emitErrorAndClose(websocket, err) { + websocket._readyState = WebSocket.CLOSING; + // + // The following assignment is practically useless and is done only for + // consistency. + // + websocket._errorEmitted = true; + websocket.emit('error', err); + websocket.emitClose(); +} + +/** + * Create a `net.Socket` and initiate a connection. + * + * @param {Object} options Connection options + * @return {net.Socket} The newly created socket used to start the connection + * @private + */ +function netConnect(options) { + options.path = options.socketPath; + return net.connect(options); +} + +/** + * Create a `tls.TLSSocket` and initiate a connection. + * + * @param {Object} options Connection options + * @return {tls.TLSSocket} The newly created socket used to start the connection + * @private + */ +function tlsConnect(options) { + options.path = undefined; + + if (!options.servername && options.servername !== '') { + options.servername = net.isIP(options.host) ? '' : options.host; + } + + return tls.connect(options); +} + +/** + * Abort the handshake and emit an error. + * + * @param {WebSocket} websocket The WebSocket instance + * @param {(http.ClientRequest|net.Socket|tls.Socket)} stream The request to + * abort or the socket to destroy + * @param {String} message The error message + * @private + */ +function abortHandshake(websocket, stream, message) { + websocket._readyState = WebSocket.CLOSING; + + const err = new Error(message); + Error.captureStackTrace(err, abortHandshake); + + if (stream.setHeader) { + stream[kAborted] = true; + stream.abort(); + + if (stream.socket && !stream.socket.destroyed) { + // + // On Node.js >= 14.3.0 `request.abort()` does not destroy the socket if + // called after the request completed. See + // https://github.com/websockets/ws/issues/1869. + // + stream.socket.destroy(); + } + + process.nextTick(emitErrorAndClose, websocket, err); + } else { + stream.destroy(err); + stream.once('error', websocket.emit.bind(websocket, 'error')); + stream.once('close', websocket.emitClose.bind(websocket)); + } +} + +/** + * Handle cases where the `ping()`, `pong()`, or `send()` methods are called + * when the `readyState` attribute is `CLOSING` or `CLOSED`. + * + * @param {WebSocket} websocket The WebSocket instance + * @param {*} [data] The data to send + * @param {Function} [cb] Callback + * @private + */ +function sendAfterClose(websocket, data, cb) { + if (data) { + const length = isBlob(data) ? data.size : toBuffer(data).length; + + // + // The `_bufferedAmount` property is used only when the peer is a client and + // the opening handshake fails. Under these circumstances, in fact, the + // `setSocket()` method is not called, so the `_socket` and `_sender` + // properties are set to `null`. + // + if (websocket._socket) websocket._sender._bufferedBytes += length; + else websocket._bufferedAmount += length; + } + + if (cb) { + const err = new Error( + `WebSocket is not open: readyState ${websocket.readyState} ` + + `(${readyStates[websocket.readyState]})` + ); + process.nextTick(cb, err); + } +} + +/** + * The listener of the `Receiver` `'conclude'` event. + * + * @param {Number} code The status code + * @param {Buffer} reason The reason for closing + * @private + */ +function receiverOnConclude(code, reason) { + const websocket = this[kWebSocket]; + + websocket._closeFrameReceived = true; + websocket._closeMessage = reason; + websocket._closeCode = code; + + if (websocket._socket[kWebSocket] === undefined) return; + + websocket._socket.removeListener('data', socketOnData); + process.nextTick(resume, websocket._socket); + + if (code === 1005) websocket.close(); + else websocket.close(code, reason); +} + +/** + * The listener of the `Receiver` `'drain'` event. + * + * @private + */ +function receiverOnDrain() { + const websocket = this[kWebSocket]; + + if (!websocket.isPaused) websocket._socket.resume(); +} + +/** + * The listener of the `Receiver` `'error'` event. + * + * @param {(RangeError|Error)} err The emitted error + * @private + */ +function receiverOnError(err) { + const websocket = this[kWebSocket]; + + if (websocket._socket[kWebSocket] !== undefined) { + websocket._socket.removeListener('data', socketOnData); + + // + // On Node.js < 14.0.0 the `'error'` event is emitted synchronously. See + // https://github.com/websockets/ws/issues/1940. + // + process.nextTick(resume, websocket._socket); + + websocket.close(err[kStatusCode]); + } + + if (!websocket._errorEmitted) { + websocket._errorEmitted = true; + websocket.emit('error', err); + } +} + +/** + * The listener of the `Receiver` `'finish'` event. + * + * @private + */ +function receiverOnFinish() { + this[kWebSocket].emitClose(); +} + +/** + * The listener of the `Receiver` `'message'` event. + * + * @param {Buffer|ArrayBuffer|Buffer[])} data The message + * @param {Boolean} isBinary Specifies whether the message is binary or not + * @private + */ +function receiverOnMessage(data, isBinary) { + this[kWebSocket].emit('message', data, isBinary); +} + +/** + * The listener of the `Receiver` `'ping'` event. + * + * @param {Buffer} data The data included in the ping frame + * @private + */ +function receiverOnPing(data) { + const websocket = this[kWebSocket]; + + if (websocket._autoPong) websocket.pong(data, !this._isServer, NOOP); + websocket.emit('ping', data); +} + +/** + * The listener of the `Receiver` `'pong'` event. + * + * @param {Buffer} data The data included in the pong frame + * @private + */ +function receiverOnPong(data) { + this[kWebSocket].emit('pong', data); +} + +/** + * Resume a readable stream + * + * @param {Readable} stream The readable stream + * @private + */ +function resume(stream) { + stream.resume(); +} + +/** + * The `Sender` error event handler. + * + * @param {Error} The error + * @private + */ +function senderOnError(err) { + const websocket = this[kWebSocket]; + + if (websocket.readyState === WebSocket.CLOSED) return; + if (websocket.readyState === WebSocket.OPEN) { + websocket._readyState = WebSocket.CLOSING; + setCloseTimer(websocket); + } + + // + // `socket.end()` is used instead of `socket.destroy()` to allow the other + // peer to finish sending queued data. There is no need to set a timer here + // because `CLOSING` means that it is already set or not needed. + // + this._socket.end(); + + if (!websocket._errorEmitted) { + websocket._errorEmitted = true; + websocket.emit('error', err); + } +} + +/** + * Set a timer to destroy the underlying raw socket of a WebSocket. + * + * @param {WebSocket} websocket The WebSocket instance + * @private + */ +function setCloseTimer(websocket) { + websocket._closeTimer = setTimeout( + websocket._socket.destroy.bind(websocket._socket), + closeTimeout + ); +} + +/** + * The listener of the socket `'close'` event. + * + * @private + */ +function socketOnClose() { + const websocket = this[kWebSocket]; + + this.removeListener('close', socketOnClose); + this.removeListener('data', socketOnData); + this.removeListener('end', socketOnEnd); + + websocket._readyState = WebSocket.CLOSING; + + let chunk; + + // + // The close frame might not have been received or the `'end'` event emitted, + // for example, if the socket was destroyed due to an error. Ensure that the + // `receiver` stream is closed after writing any remaining buffered data to + // it. If the readable side of the socket is in flowing mode then there is no + // buffered data as everything has been already written and `readable.read()` + // will return `null`. If instead, the socket is paused, any possible buffered + // data will be read as a single chunk. + // + if ( + !this._readableState.endEmitted && + !websocket._closeFrameReceived && + !websocket._receiver._writableState.errorEmitted && + (chunk = websocket._socket.read()) !== null + ) { + websocket._receiver.write(chunk); + } + + websocket._receiver.end(); + + this[kWebSocket] = undefined; + + clearTimeout(websocket._closeTimer); + + if ( + websocket._receiver._writableState.finished || + websocket._receiver._writableState.errorEmitted + ) { + websocket.emitClose(); + } else { + websocket._receiver.on('error', receiverOnFinish); + websocket._receiver.on('finish', receiverOnFinish); + } +} + +/** + * The listener of the socket `'data'` event. + * + * @param {Buffer} chunk A chunk of data + * @private + */ +function socketOnData(chunk) { + if (!this[kWebSocket]._receiver.write(chunk)) { + this.pause(); + } +} + +/** + * The listener of the socket `'end'` event. + * + * @private + */ +function socketOnEnd() { + const websocket = this[kWebSocket]; + + websocket._readyState = WebSocket.CLOSING; + websocket._receiver.end(); + this.end(); +} + +/** + * The listener of the socket `'error'` event. + * + * @private + */ +function socketOnError() { + const websocket = this[kWebSocket]; + + this.removeListener('error', socketOnError); + this.on('error', NOOP); + + if (websocket) { + websocket._readyState = WebSocket.CLOSING; + this.destroy(); + } +} diff --git a/node_modules/ws/package.json b/node_modules/ws/package.json new file mode 100644 index 0000000..4f7155d --- /dev/null +++ b/node_modules/ws/package.json @@ -0,0 +1,69 @@ +{ + "name": "ws", + "version": "8.18.0", + "description": "Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js", + "keywords": [ + "HyBi", + "Push", + "RFC-6455", + "WebSocket", + "WebSockets", + "real-time" + ], + "homepage": "https://github.com/websockets/ws", + "bugs": "https://github.com/websockets/ws/issues", + "repository": { + "type": "git", + "url": "git+https://github.com/websockets/ws.git" + }, + "author": "Einar Otto Stangvik (http://2x.io)", + "license": "MIT", + "main": "index.js", + "exports": { + ".": { + "browser": "./browser.js", + "import": "./wrapper.mjs", + "require": "./index.js" + }, + "./package.json": "./package.json" + }, + "browser": "browser.js", + "engines": { + "node": ">=10.0.0" + }, + "files": [ + "browser.js", + "index.js", + "lib/*.js", + "wrapper.mjs" + ], + "scripts": { + "test": "nyc --reporter=lcov --reporter=text mocha --throw-deprecation test/*.test.js", + "integration": "mocha --throw-deprecation test/*.integration.js", + "lint": "eslint . && prettier --check --ignore-path .gitignore \"**/*.{json,md,yaml,yml}\"" + }, + "peerDependencies": { + "bufferutil": "^4.0.1", + "utf-8-validate": ">=5.0.2" + }, + "peerDependenciesMeta": { + "bufferutil": { + "optional": true + }, + "utf-8-validate": { + "optional": true + } + }, + "devDependencies": { + "benchmark": "^2.1.4", + "bufferutil": "^4.0.1", + "eslint": "^9.0.0", + "eslint-config-prettier": "^9.0.0", + "eslint-plugin-prettier": "^5.0.0", + "globals": "^15.0.0", + "mocha": "^8.4.0", + "nyc": "^15.0.0", + "prettier": "^3.0.0", + "utf-8-validate": "^6.0.0" + } +} diff --git a/node_modules/ws/wrapper.mjs b/node_modules/ws/wrapper.mjs new file mode 100644 index 0000000..7245ad1 --- /dev/null +++ b/node_modules/ws/wrapper.mjs @@ -0,0 +1,8 @@ +import createWebSocketStream from './lib/stream.js'; +import Receiver from './lib/receiver.js'; +import Sender from './lib/sender.js'; +import WebSocket from './lib/websocket.js'; +import WebSocketServer from './lib/websocket-server.js'; + +export { createWebSocketStream, Receiver, Sender, WebSocket, WebSocketServer }; +export default WebSocket; diff --git a/package.json b/package.json new file mode 100644 index 0000000..bcf76e9 --- /dev/null +++ b/package.json @@ -0,0 +1,9 @@ +{ + "name": "wavServerTest", + "version": "1.0.0", + "main": "index.js", + "license": "MIT", + "dependencies": { + "ws": "^8.18.0" + } +} diff --git a/server/.DS_Store b/server/.DS_Store new file mode 100644 index 0000000..6a468eb Binary files /dev/null and b/server/.DS_Store differ diff --git a/server/8bit.aac b/server/8bit.aac new file mode 100644 index 0000000..1b971ed Binary files /dev/null and b/server/8bit.aac differ diff --git a/server/8bit.wav b/server/8bit.wav new file mode 100644 index 0000000..90f58dd Binary files /dev/null and b/server/8bit.wav differ diff --git a/server/audio.aac b/server/audio.aac new file mode 100644 index 0000000..00815fd Binary files /dev/null and b/server/audio.aac differ diff --git a/server/server.js b/server/server.js new file mode 100644 index 0000000..11d132a --- /dev/null +++ b/server/server.js @@ -0,0 +1,70 @@ +const WebSocket = require('ws'); +const { spawn } = require('child_process'); +const path = require('path'); + +const PORT = 8000; +const AAC_FILE_PATH = path.join(__dirname, 'audio.aac'); + +// 创建 WebSocket 服务器 +const wss = new WebSocket.Server({ port: PORT }, () => { + console.log(`WebSocket server started on port ${PORT}`); +}); + +function sendAudioStream(ws, filePath) { + const ffmpeg = spawn('ffmpeg', [ + '-i', filePath, // 输入文件 + '-f', 'adts', // 输出格式 + '-acodec', 'copy', // 复制编码 + '-vn', // 不输出视频 + '-' // 输出到标准输出 + ]); + + // const sampleRate = 44100; // 采样率 + const sampleRate = 16000; // 采样率 + // const frameDuration = frameSize / sampleRate; // 每帧的持续时间，单位为毫秒 + + const frameSize = 4096; //frameSize fixed 1024=>4096 // AAC 帧大小 + let buffer = Buffer.alloc(0); + let frameTime = 0; + ffmpeg.stdout.on('data', (chunk) => { + buffer = Buffer.concat([buffer, chunk]); + while (buffer.length >= frameSize) { + const frame = buffer.slice(0, frameSize); + buffer = buffer.slice(frameSize); + // setTimeout(() => { + // if (ws.readyState === WebSocket.OPEN) { + ws.send(frame); + // } + // }, frameTime); + // frameTime += frameDuration; + } + }); + + ffmpeg.stderr.on('data', (data) => { + console.error(`ffmpeg error: ${data}`); + }); + + ffmpeg.on('close', (code) => { + console.log(`ffmpeg process exited with code ${code}`); + if (ws.readyState === WebSocket.OPEN) { + sendAudioStream(ws, filePath); // 重启 ffmpeg 以实现循环推流 + } + }); + + ws.on('close', () => { + ffmpeg.kill(); + }); +} + +wss.on('connection', (ws) => { + console.log('Client connected'); + sendAudioStream(ws, AAC_FILE_PATH); + + ws.on('close', () => { + console.log('Client disconnected'); + }); +}); + +wss.on('error', (err) => { + console.error('WebSocket server error:', err); +}); diff --git a/server/test.aac b/server/test.aac new file mode 100644 index 0000000..1b9d7de Binary files /dev/null and b/server/test.aac differ diff --git a/yarn.lock b/yarn.lock new file mode 100644 index 0000000..b7bb9c8 --- /dev/null +++ b/yarn.lock @@ -0,0 +1,8 @@ +# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY. +# yarn lockfile v1 + + +ws@^8.18.0: + version "8.18.0" + resolved "https://registry.npmjs.org/ws/-/ws-8.18.0.tgz#0d7505a6eafe2b0e712d232b42279f53bc289bbc" + integrity sha512-8VbfWfHLbbwu3+N6OKsOMpBdT4kXPDDB9cJk2bJ6mh9ucxdlnNvH1e+roYkKmN9Nxw2yjz7VzeO9oOz2zJ04Pw==