From c7e12df02de785d7dbd36a2c9d12b8d91988961d Mon Sep 17 00:00:00 2001 From: -=ybafelo Date: Mon, 20 Aug 2018 17:26:45 +0200 Subject: [PATCH] initial commit --- config.js | 1 + index.js | 24 + node_modules/async-limiter/.travis.yml | 7 + node_modules/async-limiter/LICENSE | 8 + .../async-limiter/coverage/coverage.json | 1 + .../lcov-report/async-throttle/index.html | 73 ++ .../lcov-report/async-throttle/index.js.html | 246 ++++++ .../coverage/lcov-report/base.css | 182 ++++ .../coverage/lcov-report/index.html | 73 ++ .../coverage/lcov-report/prettify.css | 1 + .../coverage/lcov-report/prettify.js | 1 + .../lcov-report/sort-arrow-sprite.png | Bin 0 -> 209 bytes .../coverage/lcov-report/sorter.js | 156 ++++ node_modules/async-limiter/coverage/lcov.info | 74 ++ node_modules/async-limiter/index.js | 67 ++ node_modules/async-limiter/package.json | 69 ++ node_modules/async-limiter/readme.md | 132 +++ node_modules/ws/LICENSE | 21 + node_modules/ws/README.md | 417 +++++++++ node_modules/ws/browser.js | 8 + node_modules/ws/index.js | 9 + node_modules/ws/lib/buffer-util.js | 72 ++ node_modules/ws/lib/constants.js | 10 + node_modules/ws/lib/event-target.js | 170 ++++ node_modules/ws/lib/extension.js | 211 +++++ node_modules/ws/lib/permessage-deflate.js | 508 +++++++++++ node_modules/ws/lib/receiver.js | 513 +++++++++++ node_modules/ws/lib/sender.js | 401 +++++++++ node_modules/ws/lib/validation.js | 29 + node_modules/ws/lib/websocket-server.js | 357 ++++++++ node_modules/ws/lib/websocket.js | 827 ++++++++++++++++++ node_modules/ws/package.json | 80 ++ package-lock.json | 21 + package.json | 7 + r3.js | 1 + 35 files changed, 4777 insertions(+) create mode 120000 config.js create mode 100644 index.js create mode 100644 node_modules/async-limiter/.travis.yml create mode 100644 node_modules/async-limiter/LICENSE create mode 100644 node_modules/async-limiter/coverage/coverage.json create mode 100644 node_modules/async-limiter/coverage/lcov-report/async-throttle/index.html create mode 100644 node_modules/async-limiter/coverage/lcov-report/async-throttle/index.js.html create mode 100644 node_modules/async-limiter/coverage/lcov-report/base.css create mode 100644 node_modules/async-limiter/coverage/lcov-report/index.html create mode 100644 node_modules/async-limiter/coverage/lcov-report/prettify.css create mode 100644 node_modules/async-limiter/coverage/lcov-report/prettify.js create mode 100644 node_modules/async-limiter/coverage/lcov-report/sort-arrow-sprite.png create mode 100644 node_modules/async-limiter/coverage/lcov-report/sorter.js create mode 100644 node_modules/async-limiter/coverage/lcov.info create mode 100644 node_modules/async-limiter/index.js create mode 100644 node_modules/async-limiter/package.json create mode 100644 node_modules/async-limiter/readme.md create mode 100644 node_modules/ws/LICENSE create mode 100644 node_modules/ws/README.md create mode 100644 node_modules/ws/browser.js create mode 100644 node_modules/ws/index.js create mode 100644 node_modules/ws/lib/buffer-util.js create mode 100644 node_modules/ws/lib/constants.js create mode 100644 node_modules/ws/lib/event-target.js create mode 100644 node_modules/ws/lib/extension.js create mode 100644 node_modules/ws/lib/permessage-deflate.js create mode 100644 node_modules/ws/lib/receiver.js create mode 100644 node_modules/ws/lib/sender.js create mode 100644 node_modules/ws/lib/validation.js create mode 100644 node_modules/ws/lib/websocket-server.js create mode 100644 node_modules/ws/lib/websocket.js create mode 100644 node_modules/ws/package.json create mode 100644 package-lock.json create mode 100644 package.json create mode 120000 r3.js diff --git a/config.js b/config.js new file mode 120000 index 0000000..43250d8 --- /dev/null +++ b/config.js @@ -0,0 +1 @@ +../r3-config/config.js \ No newline at end of file diff --git a/index.js b/index.js new file mode 100644 index 0000000..8925ac5 --- /dev/null +++ b/index.js @@ -0,0 +1,24 @@ +const WebSocket = require('ws'); +const R3 = require('./r3.js'); +const config = require('./config'); +const http = require('http'); +const https = require('https'); + +var server = null; + +if (config.websocket.protocol === R3.API.Server.PROTOCOL_WEBSOCKET_SSL) { + server = https.createServer(); +} else { + server = http.createServer(); +} + +const wss = new WebSocket.Server( + { + port : config.websocket.port, + host : config.websocket.url, + perMessageDeflate: false, + server : server + } +); + +server.listen(config.websocket.port); diff --git a/node_modules/async-limiter/.travis.yml b/node_modules/async-limiter/.travis.yml new file mode 100644 index 0000000..6cf4a7a --- /dev/null +++ b/node_modules/async-limiter/.travis.yml @@ -0,0 +1,7 @@ +language: node_js +node_js: + - "6" + - "node" +script: npm run travis +cache: + yarn: true diff --git a/node_modules/async-limiter/LICENSE b/node_modules/async-limiter/LICENSE new file mode 100644 index 0000000..9c91fb2 --- /dev/null +++ b/node_modules/async-limiter/LICENSE @@ -0,0 +1,8 @@ +The MIT License (MIT) +Copyright (c) 2017 Samuel Reed + +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/async-limiter/coverage/coverage.json b/node_modules/async-limiter/coverage/coverage.json new file mode 100644 index 0000000..5b4a358 --- /dev/null +++ b/node_modules/async-limiter/coverage/coverage.json @@ -0,0 +1 @@ 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+ + + + + diff --git a/node_modules/async-limiter/coverage/lcov-report/async-throttle/index.js.html b/node_modules/async-limiter/coverage/lcov-report/async-throttle/index.js.html new file mode 100644 index 0000000..adc030f --- /dev/null +++ b/node_modules/async-limiter/coverage/lcov-report/async-throttle/index.js.html @@ -0,0 +1,246 @@ + + + + Code coverage report for async-throttle/index.js + + + + + + +
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'use strict';
+ 
+function Queue(options) {
+  if (!(this instanceof Queue)) {
+    return new Queue(options);
+  }
+ 
+  options = options || {};
+  this.concurrency = options.concurrency || Infinity;
+  this.pending = 0;
+  this.jobs = [];
+  this.cbs = [];
+  this._done = done.bind(this);
+}
+ 
+var arrayAddMethods = [
+  'push',
+  'unshift',
+  'splice'
+];
+ 
+arrayAddMethods.forEach(function(method) {
+  Queue.prototype[method] = function() {
+    var methodResult = Array.prototype[method].apply(this.jobs, arguments);
+    this._run();
+    return methodResult;
+  };
+});
+ 
+Object.defineProperty(Queue.prototype, 'length', {
+  get: function() {
+    return this.pending + this.jobs.length;
+  }
+});
+ 
+Queue.prototype._run = function() {
+  if (this.pending === this.concurrency) {
+    return;
+  }
+  if (this.jobs.length) {
+    var job = this.jobs.shift();
+    this.pending++;
+    job(this._done);
+    this._run();
+  }
+ 
+  if (this.pending === 0) {
+    while (this.cbs.length !== 0) {
+      var cb = this.cbs.pop();
+      process.nextTick(cb);
+    }
+  }
+};
+ 
+Queue.prototype.onDone = function(cb) {
+  Eif (typeof cb === 'function') {
+    this.cbs.push(cb);
+    this._run();
+  }
+};
+ 
+function done() {
+  this.pending--;
+  this._run();
+}
+ 
+module.exports = Queue;
+ 
+ +
+
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+

Code coverage report for All files

+

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+ +function Queue(options) { + if (!(this instanceof Queue)) { + return new Queue(options); + } + + options = options || {}; + this.concurrency = options.concurrency || Infinity; + this.pending = 0; + this.jobs = []; + this.cbs = []; + this._done = done.bind(this); +} + +var arrayAddMethods = [ + 'push', + 'unshift', + 'splice' +]; + +arrayAddMethods.forEach(function(method) { + Queue.prototype[method] = function() { + var methodResult = Array.prototype[method].apply(this.jobs, arguments); + this._run(); + return methodResult; + }; +}); + +Object.defineProperty(Queue.prototype, 'length', { + get: function() { + return this.pending + this.jobs.length; + } +}); + +Queue.prototype._run = function() { + if (this.pending === this.concurrency) { + return; + } + if (this.jobs.length) { + var job = this.jobs.shift(); + this.pending++; + job(this._done); + this._run(); + } + + if (this.pending === 0) { + while (this.cbs.length !== 0) { + var cb = this.cbs.pop(); + process.nextTick(cb); + } + } +}; + +Queue.prototype.onDone = function(cb) { + if (typeof cb === 'function') { + this.cbs.push(cb); + this._run(); + } +}; + +function done() { + this.pending--; + this._run(); +} + +module.exports = Queue; diff --git a/node_modules/async-limiter/package.json b/node_modules/async-limiter/package.json new file mode 100644 index 0000000..6212641 --- /dev/null +++ b/node_modules/async-limiter/package.json @@ -0,0 +1,69 @@ +{ + "_from": "async-limiter@~1.0.0", + "_id": "async-limiter@1.0.0", + "_inBundle": false, + "_integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg==", + "_location": "/async-limiter", + "_phantomChildren": {}, + "_requested": { + "type": "range", + "registry": true, + "raw": "async-limiter@~1.0.0", + "name": "async-limiter", + "escapedName": "async-limiter", + "rawSpec": "~1.0.0", + "saveSpec": null, + "fetchSpec": "~1.0.0" + }, + "_requiredBy": [ + "/ws" + ], + "_resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz", + "_shasum": "78faed8c3d074ab81f22b4e985d79e8738f720f8", + "_spec": "async-limiter@~1.0.0", + "_where": "/usr/share/cybafelo/r3-websocket/node_modules/ws", + "author": { + "name": "Samuel Reed" + }, + "bugs": { + "url": "https://github.com/strml/async-limiter/issues" + }, + "bundleDependencies": false, + "dependencies": {}, + "deprecated": false, + "description": "asynchronous function queue with adjustable concurrency", + "devDependencies": { + "coveralls": "^2.11.2", + "eslint": "^4.6.1", + "eslint-plugin-mocha": "^4.11.0", + "intelli-espower-loader": "^1.0.1", + "istanbul": "^0.3.2", + "mocha": "^3.5.2", + "power-assert": "^1.4.4" + }, + "homepage": "https://github.com/strml/async-limiter#readme", + "keywords": [ + "throttle", + "async", + "limiter", + "asynchronous", + "job", + "task", + "concurrency", + "concurrent" + ], + "license": "MIT", + "name": "async-limiter", + "repository": { + "type": "git", + "url": "git+https://github.com/strml/async-limiter.git" + }, + "scripts": { + "coverage": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | coveralls", + "example": "node example", + "lint": "eslint .", + "test": "mocha --R intelli-espower-loader test/", + "travis": "npm run lint && npm run coverage" + }, + "version": "1.0.0" +} diff --git a/node_modules/async-limiter/readme.md b/node_modules/async-limiter/readme.md new file mode 100644 index 0000000..dcf4932 --- /dev/null +++ b/node_modules/async-limiter/readme.md @@ -0,0 +1,132 @@ +# Async-Limiter + +A module for limiting concurrent asynchronous actions in flight. Forked from [queue](https://github.com/jessetane/queue). + +[![npm](http://img.shields.io/npm/v/async-limiter.svg?style=flat-square)](http://www.npmjs.org/async-limiter) +[![tests](https://img.shields.io/travis/STRML/async-limiter.svg?style=flat-square&branch=master)](https://travis-ci.org/STRML/async-limiter) +[![coverage](https://img.shields.io/coveralls/STRML/async-limiter.svg?style=flat-square&branch=master)](https://coveralls.io/r/STRML/async-limiter) + +This module exports a class `Limiter` that implements some of the `Array` API. +Pass async functions (ones that accept a callback or return a promise) to an instance's additive array methods. + +## Motivation + +Certain functions, like `zlib`, have [undesirable behavior](https://github.com/nodejs/node/issues/8871#issuecomment-250915913) when +run at infinite concurrency. + +In this case, it is actually faster, and takes far less memory, to limit concurrency. + +This module should do the absolute minimum work necessary to queue up functions. PRs are welcome that would +make this module faster or lighter, but new functionality is not desired. + +Style should confirm to nodejs/node style. + +## Example + +``` javascript +var Limiter = require('async-limiter') + +var t = new Limiter({concurrency: 2}); +var results = [] + +// add jobs using the familiar Array API +t.push(function (cb) { + results.push('two') + cb() +}) + +t.push( + function (cb) { + results.push('four') + cb() + }, + function (cb) { + results.push('five') + cb() + } +) + +t.unshift(function (cb) { + results.push('one') + cb() +}) + +t.splice(2, 0, function (cb) { + results.push('three') + cb() +}) + +// Jobs run automatically. If you want a callback when all are done, +// call 'onDone()'. +t.onDone(function () { + console.log('all done:', results) +}) +``` + +## Zlib Example + +```js +const zlib = require('zlib'); +const Limiter = require('async-limiter'); + +const message = {some: "data"}; +const payload = new Buffer(JSON.stringify(message)); + +// Try with different concurrency values to see how this actually +// slows significantly with higher concurrency! +// +// 5: 1398.607ms +// 10: 1375.668ms +// Infinity: 4423.300ms +// +const t = new Limiter({concurrency: 5}); +function deflate(payload, cb) { + t.push(function(done) { + zlib.deflate(payload, function(err, buffer) { + done(); + cb(err, buffer); + }); + }); +} + +console.time('deflate'); +for(let i = 0; i < 30000; ++i) { + deflate(payload, function (err, buffer) {}); +} +q.onDone(function() { + console.timeEnd('deflate'); +}); +``` + +## Install + +`npm install async-limiter` + +## Test + +`npm test` + +## API + +### `var t = new Limiter([opts])` +Constructor. `opts` may contain inital values for: +* `q.concurrency` + +## Instance methods + +### `q.onDone(fn)` +`fn` will be called once and only once, when the queue is empty. + +## Instance methods mixed in from `Array` +Mozilla has docs on how these methods work [here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array). +### `q.push(element1, ..., elementN)` +### `q.unshift(element1, ..., elementN)` +### `q.splice(index , howMany[, element1[, ...[, elementN]]])` + +## Properties +### `q.concurrency` +Max number of jobs the queue should process concurrently, defaults to `Infinity`. + +### `q.length` +Jobs pending + jobs to process (readonly). + diff --git a/node_modules/ws/LICENSE b/node_modules/ws/LICENSE new file mode 100644 index 0000000..a145cd1 --- /dev/null +++ b/node_modules/ws/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2011 Einar Otto Stangvik + +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..3fd9a8c --- /dev/null +++ b/node_modules/ws/README.md @@ -0,0 +1,417 @@ +# ws: a Node.js WebSocket library + +[![Version npm](https://img.shields.io/npm/v/ws.svg)](https://www.npmjs.com/package/ws) +[![Linux Build](https://img.shields.io/travis/websockets/ws/master.svg)](https://travis-ci.org/websockets/ws) +[![Windows Build](https://ci.appveyor.com/api/projects/status/github/websockets/ws?branch=master&svg=true)](https://ci.appveyor.com/project/lpinca/ws) +[![Coverage Status](https://img.shields.io/coveralls/websockets/ws/master.svg)](https://coveralls.io/r/websockets/ws?branch=master) + +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 back end 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 and spec compliance](#opt-in-for-performance-and-spec-compliance) +* [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) + + [Server broadcast](#server-broadcast) + + [echo.websocket.org demo](#echowebsocketorg-demo) + + [Other examples](#other-examples) +* [Error handling best practices](#error-handling-best-practices) +* [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 --save ws +``` + +### Opt-in for performance and spec compliance + +There are 2 optional modules that can be installed along side with the ws +module. These modules are binary addons which improve certain operations. +Prebuilt binaries are available for the most popular platforms so you don't +necessarily need to have a C++ compiler installed on your machine. + +- `npm install --save-optional bufferutil`: Allows to efficiently perform + operations such as masking and unmasking the data payload of the WebSocket + frames. +- `npm install --save-optional utf-8-validate`: Allows to efficiently check + if a message contains valid UTF-8 as required by the spec. + +## API docs + +See [`/doc/ws.md`](./doc/ws.md) for Node.js-like docs for the ws classes. + +## 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 +const WebSocket = require('ws'); + +const wss = new WebSocket.Server({ + 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. + clientMaxWindowBits: 10, // 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. + } +}); +``` + +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 +const WebSocket = require('ws'); + +const ws = new WebSocket('ws://www.host.com/path', { + perMessageDeflate: false +}); +``` + +## Usage examples + +### Sending and receiving text data + +```js +const WebSocket = require('ws'); + +const ws = new WebSocket('ws://www.host.com/path'); + +ws.on('open', function open() { + ws.send('something'); +}); + +ws.on('message', function incoming(data) { + console.log(data); +}); +``` + +### Sending binary data + +```js +const WebSocket = require('ws'); + +const ws = new WebSocket('ws://www.host.com/path'); + +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 +const WebSocket = require('ws'); + +const wss = new WebSocket.Server({ port: 8080 }); + +wss.on('connection', function connection(ws) { + ws.on('message', function incoming(message) { + console.log('received: %s', message); + }); + + ws.send('something'); +}); +``` + +### External HTTP/S server + +```js +const fs = require('fs'); +const https = require('https'); +const WebSocket = require('ws'); + +const server = new https.createServer({ + cert: fs.readFileSync('/path/to/cert.pem'), + key: fs.readFileSync('/path/to/key.pem') +}); +const wss = new WebSocket.Server({ server }); + +wss.on('connection', function connection(ws) { + ws.on('message', function incoming(message) { + console.log('received: %s', message); + }); + + ws.send('something'); +}); + +server.listen(8080); +``` + +### Multiple servers sharing a single HTTP/S server + +```js +const http = require('http'); +const WebSocket = require('ws'); + +const server = http.createServer(); +const wss1 = new WebSocket.Server({ noServer: true }); +const wss2 = new WebSocket.Server({ noServer: true }); + +wss1.on('connection', function connection(ws) { + // ... +}); + +wss2.on('connection', function connection(ws) { + // ... +}); + +server.on('upgrade', function upgrade(request, socket, head) { + const pathname = url.parse(request.url).pathname; + + 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); +``` + +### Server broadcast + +```js +const WebSocket = require('ws'); + +const wss = new WebSocket.Server({ port: 8080 }); + +// Broadcast to all. +wss.broadcast = function broadcast(data) { + wss.clients.forEach(function each(client) { + if (client.readyState === WebSocket.OPEN) { + client.send(data); + } + }); +}; + +wss.on('connection', function connection(ws) { + ws.on('message', function incoming(data) { + // Broadcast to everyone else. + wss.clients.forEach(function each(client) { + if (client !== ws && client.readyState === WebSocket.OPEN) { + client.send(data); + } + }); + }); +}); +``` + +### echo.websocket.org demo + +```js +const WebSocket = require('ws'); + +const ws = new WebSocket('wss://echo.websocket.org/', { + origin: 'https://websocket.org' +}); + +ws.on('open', function open() { + console.log('connected'); + ws.send(Date.now()); +}); + +ws.on('close', function close() { + console.log('disconnected'); +}); + +ws.on('message', function incoming(data) { + console.log(`Roundtrip time: ${Date.now() - data} ms`); + + setTimeout(function timeout() { + ws.send(Date.now()); + }, 500); +}); +``` + +### Other examples + +For a full example with a browser client communicating with a ws server, see the +examples folder. + +Otherwise, see the test cases. + +## Error handling best practices + +```js +// If the WebSocket is closed before the following send is attempted +ws.send('something'); + +// Errors (both immediate and async write errors) can be detected in an optional +// callback. The callback is also the only way of being notified that data has +// actually been sent. +ws.send('something', function ack(error) { + // If error is not defined, the send has been completed, otherwise the error + // object will indicate what failed. +}); + +// Immediate errors can also be handled with `try...catch`, but **note** that +// since sends are inherently asynchronous, socket write failures will *not* be +// captured when this technique is used. +try { ws.send('something'); } +catch (e) { /* handle error */ } +``` + +## FAQ + +### How to get the IP address of the client? + +The remote IP address can be obtained from the raw socket. + +```js +const WebSocket = require('ws'); + +const wss = new WebSocket.Server({ port: 8080 }); + +wss.on('connection', function connection(ws, req) { + const ip = req.connection.remoteAddress; +}); +``` + +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(/\s*,\s*/)[0]; +}); +``` + +### 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 +const WebSocket = require('ws'); + +const wss = new WebSocket.Server({ port: 8080 }); + +function noop() {} + +function heartbeat() { + this.isAlive = true; +} + +wss.on('connection', function connection(ws) { + ws.isAlive = true; + 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(noop); + }); +}, 30000); +``` + +Pong messages are automatically sent in response to ping messages as required +by the spec. + +### 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) + +[https-proxy-agent]: https://github.com/TooTallNate/node-https-proxy-agent +[socks-proxy-agent]: https://github.com/TooTallNate/node-socks-proxy-agent +[client-report]: http://websockets.github.io/ws/autobahn/clients/ +[server-report]: http://websockets.github.io/ws/autobahn/servers/ +[permessage-deflate]: https://tools.ietf.org/html/rfc7692 +[changelog]: https://github.com/websockets/ws/releases +[node-zlib-bug]: https://github.com/nodejs/node/issues/8871 +[node-zlib-deflaterawdocs]: https://nodejs.org/api/zlib.html#zlib_zlib_createdeflateraw_options +[ws-server-options]: https://github.com/websockets/ws/blob/master/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..b8d6be1 --- /dev/null +++ b/node_modules/ws/index.js @@ -0,0 +1,9 @@ +'use strict'; + +const WebSocket = require('./lib/websocket'); + +WebSocket.Server = require('./lib/websocket-server'); +WebSocket.Receiver = require('./lib/receiver'); +WebSocket.Sender = require('./lib/sender'); + +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..6974dd6 --- /dev/null +++ b/node_modules/ws/lib/buffer-util.js @@ -0,0 +1,72 @@ +'use strict'; + +/** + * 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) { + const target = Buffer.allocUnsafe(totalLength); + var offset = 0; + + for (var i = 0; i < list.length; i++) { + const buf = list[i]; + buf.copy(target, offset); + offset += buf.length; + } + + 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 (var 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) { + // Required until https://github.com/nodejs/node/issues/9006 is resolved. + const length = buffer.length; + for (var i = 0; i < length; i++) { + buffer[i] ^= mask[i & 3]; + } +} + +try { + const bufferUtil = require('bufferutil'); + const bu = bufferUtil.BufferUtil || bufferUtil; + + module.exports = { + mask (source, mask, output, offset, length) { + if (length < 48) _mask(source, mask, output, offset, length); + else bu.mask(source, mask, output, offset, length); + }, + unmask (buffer, mask) { + if (buffer.length < 32) _unmask(buffer, mask); + else bu.unmask(buffer, mask); + }, + concat + }; +} catch (e) /* istanbul ignore next */ { + module.exports = { concat, mask: _mask, unmask: _unmask }; +} diff --git a/node_modules/ws/lib/constants.js b/node_modules/ws/lib/constants.js new file mode 100644 index 0000000..4082981 --- /dev/null +++ b/node_modules/ws/lib/constants.js @@ -0,0 +1,10 @@ +'use strict'; + +module.exports = { + BINARY_TYPES: ['nodebuffer', 'arraybuffer', 'fragments'], + GUID: '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', + kStatusCode: Symbol('status-code'), + kWebSocket: Symbol('websocket'), + EMPTY_BUFFER: Buffer.alloc(0), + 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..574e908 --- /dev/null +++ b/node_modules/ws/lib/event-target.js @@ -0,0 +1,170 @@ +'use strict'; + +/** + * Class representing an event. + * + * @private + */ +class Event { + /** + * Create a new `Event`. + * + * @param {String} type The name of the event + * @param {Object} target A reference to the target to which the event was dispatched + */ + constructor (type, target) { + this.target = target; + this.type = type; + } +} + +/** + * Class representing a message event. + * + * @extends Event + * @private + */ +class MessageEvent extends Event { + /** + * Create a new `MessageEvent`. + * + * @param {(String|Buffer|ArrayBuffer|Buffer[])} data The received data + * @param {WebSocket} target A reference to the target to which the event was dispatched + */ + constructor (data, target) { + super('message', target); + + this.data = data; + } +} + +/** + * Class representing a close event. + * + * @extends Event + * @private + */ +class CloseEvent extends Event { + /** + * Create a new `CloseEvent`. + * + * @param {Number} code The status code explaining why the connection is being closed + * @param {String} reason A human-readable string explaining why the connection is closing + * @param {WebSocket} target A reference to the target to which the event was dispatched + */ + constructor (code, reason, target) { + super('close', target); + + this.wasClean = target._closeFrameReceived && target._closeFrameSent; + this.reason = reason; + this.code = code; + } +} + +/** + * Class representing an open event. + * + * @extends Event + * @private + */ +class OpenEvent extends Event { + /** + * Create a new `OpenEvent`. + * + * @param {WebSocket} target A reference to the target to which the event was dispatched + */ + constructor (target) { + super('open', target); + } +} + +/** + * Class representing an error event. + * + * @extends Event + * @private + */ +class ErrorEvent extends Event { + /** + * Create a new `ErrorEvent`. + * + * @param {Object} error The error that generated this event + * @param {WebSocket} target A reference to the target to which the event was dispatched + */ + constructor (error, target) { + super('error', target); + + this.message = error.message; + this.error = error; + } +} + +/** + * 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} method A string representing the event type to listen for + * @param {Function} listener The listener to add + * @public + */ + addEventListener (method, listener) { + if (typeof listener !== 'function') return; + + function onMessage (data) { + listener.call(this, new MessageEvent(data, this)); + } + + function onClose (code, message) { + listener.call(this, new CloseEvent(code, message, this)); + } + + function onError (error) { + listener.call(this, new ErrorEvent(error, this)); + } + + function onOpen () { + listener.call(this, new OpenEvent(this)); + } + + if (method === 'message') { + onMessage._listener = listener; + this.on(method, onMessage); + } else if (method === 'close') { + onClose._listener = listener; + this.on(method, onClose); + } else if (method === 'error') { + onError._listener = listener; + this.on(method, onError); + } else if (method === 'open') { + onOpen._listener = listener; + this.on(method, onOpen); + } else { + this.on(method, listener); + } + }, + + /** + * Remove an event listener. + * + * @param {String} method A string representing the event type to remove + * @param {Function} listener The listener to remove + * @public + */ + removeEventListener (method, listener) { + const listeners = this.listeners(method); + + for (var i = 0; i < listeners.length; i++) { + if (listeners[i] === listener || listeners[i]._listener === listener) { + this.removeListener(method, listeners[i]); + } + } + } +}; + +module.exports = EventTarget; diff --git a/node_modules/ws/lib/extension.js b/node_modules/ws/lib/extension.js new file mode 100644 index 0000000..3f48d75 --- /dev/null +++ b/node_modules/ws/lib/extension.js @@ -0,0 +1,211 @@ +'use strict'; + +// +// Allowed token characters: +// +// '!', '#', '$', '%', '&', ''', '*', '+', '-', +// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~' +// +// tokenChars[32] === 0 // ' ' +// tokenChars[33] === 1 // '!' +// tokenChars[34] === 0 // '"' +// ... +// +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 +]; + +/** + * 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 (Object.prototype.hasOwnProperty.call(dest, name)) dest[name].push(elem); + else dest[name] = [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 = {}; + + if (header === undefined || header === '') return offers; + + var params = {}; + var mustUnescape = false; + var isEscaping = false; + var inQuotes = false; + var extensionName; + var paramName; + var start = -1; + var end = -1; + + for (var i = 0; i < header.length; i++) { + const code = header.charCodeAt(i); + + if (extensionName === undefined) { + if (end === -1 && tokenChars[code] === 1) { + if (start === -1) start = i; + } else if (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 = {}; + } 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 = {}; + 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; + var 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 = {}; + extensionName = undefined; + } + + paramName = undefined; + start = end = -1; + } else { + throw new SyntaxError(`Unexpected character at index ${i}`); + } + } + } + + if (start === -1 || inQuotes) { + throw new SyntaxError('Unexpected end of input'); + } + + if (end === -1) end = i; + const token = header.slice(start, end); + if (extensionName === undefined) { + push(offers, token, {}); + } else { + if (paramName === undefined) { + push(params, token, true); + } else if (mustUnescape) { + push(params, paramName, token.replace(/\\/g, '')); + } else { + push(params, paramName, token); + } + push(offers, extensionName, params); + } + + return offers; +} + +/** + * Builds the `Sec-WebSocket-Extensions` header field value. + * + * @param {Object} extensions The map of extensions and parameters to format + * @return {String} A string representing the given object + * @public + */ +function format (extensions) { + return Object.keys(extensions).map((extension) => { + var configurations = extensions[extension]; + if (!Array.isArray(configurations)) configurations = [configurations]; + return configurations.map((params) => { + return [extension].concat(Object.keys(params).map((k) => { + var values = params[k]; + if (!Array.isArray(values)) values = [values]; + return values.map((v) => v === true ? k : `${k}=${v}`).join('; '); + })).join('; '); + }).join(', '); + }).join(', '); +} + +module.exports = { format, parse }; diff --git a/node_modules/ws/lib/permessage-deflate.js b/node_modules/ws/lib/permessage-deflate.js new file mode 100644 index 0000000..d4ec149 --- /dev/null +++ b/node_modules/ws/lib/permessage-deflate.js @@ -0,0 +1,508 @@ +'use strict'; + +const Limiter = require('async-limiter'); +const zlib = require('zlib'); + +const bufferUtil = require('./buffer-util'); +const constants = require('./constants'); + +const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]); +const EMPTY_BLOCK = Buffer.from([0x00]); + +const kPerMessageDeflate = Symbol('permessage-deflate'); +const kWriteInProgress = Symbol('write-in-progress'); +const kPendingClose = Symbol('pending-close'); +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} options.serverNoContextTakeover Request/accept disabling + * of server context takeover + * @param {Boolean} options.clientNoContextTakeover Advertise/acknowledge + * disabling of client context takeover + * @param {(Boolean|Number)} options.serverMaxWindowBits Request/confirm the + * use of a custom server window size + * @param {(Boolean|Number)} options.clientMaxWindowBits Advertise support + * for, or request, a custom client window size + * @param {Object} options.zlibDeflateOptions Options to pass to zlib on deflate + * @param {Object} options.zlibInflateOptions Options to pass to zlib on inflate + * @param {Number} options.threshold Size (in bytes) below which messages + * should not be compressed + * @param {Number} options.concurrencyLimit The number of concurrent calls to + * zlib + * @param {Boolean} isServer Create the instance in either server or client + * mode + * @param {Number} maxPayload 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) { + if (this._inflate[kWriteInProgress]) { + this._inflate[kPendingClose] = true; + } else { + this._inflate.close(); + this._inflate = null; + } + } + if (this._deflate) { + if (this._deflate[kWriteInProgress]) { + this._deflate[kPendingClose] = true; + } else { + this._deflate.close(); + this._deflate = null; + } + } + } + + /** + * 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) => { + var 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 by async-limiter. + * + * @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.push((done) => { + this._decompress(data, fin, (err, result) => { + done(); + callback(err, result); + }); + }); + } + + /** + * Compress data. Concurrency limited by async-limiter. + * + * @param {Buffer} 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.push((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 = `${endpoint}_max_window_bits`; + const windowBits = typeof this.params[key] !== 'number' + ? zlib.Z_DEFAULT_WINDOWBITS + : this.params[key]; + + this._inflate = zlib.createInflateRaw( + Object.assign({}, this._options.zlibInflateOptions, { windowBits }) + ); + this._inflate[kPerMessageDeflate] = this; + this._inflate[kTotalLength] = 0; + this._inflate[kBuffers] = []; + this._inflate.on('error', inflateOnError); + this._inflate.on('data', inflateOnData); + } + + this._inflate[kCallback] = callback; + this._inflate[kWriteInProgress] = true; + + this._inflate.write(data); + if (fin) this._inflate.write(TRAILER); + + this._inflate.flush(() => { + const err = this._inflate[kError]; + + if (err) { + this._inflate.close(); + this._inflate = null; + callback(err); + return; + } + + const data = bufferUtil.concat( + this._inflate[kBuffers], + this._inflate[kTotalLength] + ); + + if ( + (fin && this.params[`${endpoint}_no_context_takeover`]) || + this._inflate[kPendingClose] + ) { + this._inflate.close(); + this._inflate = null; + } else { + this._inflate[kWriteInProgress] = false; + this._inflate[kTotalLength] = 0; + this._inflate[kBuffers] = []; + } + + callback(null, data); + }); + } + + /** + * Compress data. + * + * @param {Buffer} 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) { + if (!data || data.length === 0) { + process.nextTick(callback, null, EMPTY_BLOCK); + return; + } + + const endpoint = this._isServer ? 'server' : 'client'; + + if (!this._deflate) { + const key = `${endpoint}_max_window_bits`; + const windowBits = typeof this.params[key] !== 'number' + ? zlib.Z_DEFAULT_WINDOWBITS + : this.params[key]; + + this._deflate = zlib.createDeflateRaw( + Object.assign({}, this._options.zlibDeflateOptions, { windowBits }) + ); + + this._deflate[kTotalLength] = 0; + this._deflate[kBuffers] = []; + + // + // `zlib.DeflateRaw` emits an `'error'` event only when an attempt to use + // it is made after it has already been closed. This cannot happen here, + // so we only add a listener for the `'data'` event. + // + this._deflate.on('data', deflateOnData); + } + + this._deflate[kWriteInProgress] = true; + + this._deflate.write(data); + this._deflate.flush(zlib.Z_SYNC_FLUSH, () => { + var data = bufferUtil.concat( + this._deflate[kBuffers], + this._deflate[kTotalLength] + ); + + if (fin) data = data.slice(0, data.length - 4); + + if ( + (fin && this.params[`${endpoint}_no_context_takeover`]) || + this._deflate[kPendingClose] + ) { + this._deflate.close(); + this._deflate = null; + } else { + this._deflate[kWriteInProgress] = false; + this._deflate[kTotalLength] = 0; + this._deflate[kBuffers] = []; + } + + 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][constants.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[constants.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..81dc0bf --- /dev/null +++ b/node_modules/ws/lib/receiver.js @@ -0,0 +1,513 @@ +'use strict'; + +const stream = require('stream'); + +const PerMessageDeflate = require('./permessage-deflate'); +const bufferUtil = require('./buffer-util'); +const validation = require('./validation'); +const constants = require('./constants'); + +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; + +/** + * HyBi Receiver implementation. + * + * @extends stream.Writable + */ +class Receiver extends stream.Writable { + /** + * Creates a Receiver instance. + * + * @param {String} binaryType The type for binary data + * @param {Object} extensions An object containing the negotiated extensions + * @param {Number} maxPayload The maximum allowed message length + */ + constructor (binaryType, extensions, maxPayload) { + super(); + + this._binaryType = binaryType || constants.BINARY_TYPES[0]; + this[constants.kWebSocket] = undefined; + this._extensions = extensions || {}; + this._maxPayload = maxPayload | 0; + + 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._state = GET_INFO; + this._loop = false; + } + + /** + * 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 + */ + _write (chunk, encoding, cb) { + if (this._opcode === 0x08) 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] = buf.slice(n); + return buf.slice(0, n); + } + + const dst = Buffer.allocUnsafe(n); + + do { + const buf = this._buffers[0]; + + if (n >= buf.length) { + this._buffers.shift().copy(dst, dst.length - n); + } else { + buf.copy(dst, dst.length - n, 0, n); + this._buffers[0] = buf.slice(n); + } + + n -= buf.length; + } while (n > 0); + + return dst; + } + + /** + * Starts the parsing loop. + * + * @param {Function} cb Callback + * @private + */ + startLoop (cb) { + var err; + this._loop = true; + + do { + switch (this._state) { + case GET_INFO: + err = this.getInfo(); + break; + case GET_PAYLOAD_LENGTH_16: + err = this.getPayloadLength16(); + break; + case GET_PAYLOAD_LENGTH_64: + err = this.getPayloadLength64(); + break; + case GET_MASK: + this.getMask(); + break; + case GET_DATA: + err = this.getData(cb); + break; + default: // `INFLATING` + this._loop = false; + return; + } + } while (this._loop); + + cb(err); + } + + /** + * Reads the first two bytes of a frame. + * + * @return {(RangeError|undefined)} A possible error + * @private + */ + getInfo () { + if (this._bufferedBytes < 2) { + this._loop = false; + return; + } + + const buf = this.consume(2); + + if ((buf[0] & 0x30) !== 0x00) { + this._loop = false; + return error(RangeError, 'RSV2 and RSV3 must be clear', true, 1002); + } + + const compressed = (buf[0] & 0x40) === 0x40; + + if (compressed && !this._extensions[PerMessageDeflate.extensionName]) { + this._loop = false; + return error(RangeError, 'RSV1 must be clear', true, 1002); + } + + this._fin = (buf[0] & 0x80) === 0x80; + this._opcode = buf[0] & 0x0f; + this._payloadLength = buf[1] & 0x7f; + + if (this._opcode === 0x00) { + if (compressed) { + this._loop = false; + return error(RangeError, 'RSV1 must be clear', true, 1002); + } + + if (!this._fragmented) { + this._loop = false; + return error(RangeError, 'invalid opcode 0', true, 1002); + } + + this._opcode = this._fragmented; + } else if (this._opcode === 0x01 || this._opcode === 0x02) { + if (this._fragmented) { + this._loop = false; + return error(RangeError, `invalid opcode ${this._opcode}`, true, 1002); + } + + this._compressed = compressed; + } else if (this._opcode > 0x07 && this._opcode < 0x0b) { + if (!this._fin) { + this._loop = false; + return error(RangeError, 'FIN must be set', true, 1002); + } + + if (compressed) { + this._loop = false; + return error(RangeError, 'RSV1 must be clear', true, 1002); + } + + if (this._payloadLength > 0x7d) { + this._loop = false; + return error( + RangeError, + `invalid payload length ${this._payloadLength}`, + true, + 1002 + ); + } + } else { + this._loop = false; + return error(RangeError, `invalid opcode ${this._opcode}`, true, 1002); + } + + if (!this._fin && !this._fragmented) this._fragmented = this._opcode; + this._masked = (buf[1] & 0x80) === 0x80; + + if (this._payloadLength === 126) this._state = GET_PAYLOAD_LENGTH_16; + else if (this._payloadLength === 127) this._state = GET_PAYLOAD_LENGTH_64; + else return this.haveLength(); + } + + /** + * Gets extended payload length (7+16). + * + * @return {(RangeError|undefined)} A possible error + * @private + */ + getPayloadLength16 () { + if (this._bufferedBytes < 2) { + this._loop = false; + return; + } + + this._payloadLength = this.consume(2).readUInt16BE(0); + return this.haveLength(); + } + + /** + * Gets extended payload length (7+64). + * + * @return {(RangeError|undefined)} A possible error + * @private + */ + getPayloadLength64 () { + 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) { + this._loop = false; + return error( + RangeError, + 'Unsupported WebSocket frame: payload length > 2^53 - 1', + false, + 1009 + ); + } + + this._payloadLength = num * Math.pow(2, 32) + buf.readUInt32BE(4); + return this.haveLength(); + } + + /** + * Payload length has been read. + * + * @return {(RangeError|undefined)} A possible error + * @private + */ + haveLength () { + if (this._payloadLength && this._opcode < 0x08) { + this._totalPayloadLength += this._payloadLength; + if (this._totalPayloadLength > this._maxPayload && this._maxPayload > 0) { + this._loop = false; + return error(RangeError, 'Max payload size exceeded', false, 1009); + } + } + + 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 + * @return {(Error|RangeError|undefined)} A possible error + * @private + */ + getData (cb) { + var data = constants.EMPTY_BUFFER; + + if (this._payloadLength) { + if (this._bufferedBytes < this._payloadLength) { + this._loop = false; + return; + } + + data = this.consume(this._payloadLength); + if (this._masked) bufferUtil.unmask(data, this._mask); + } + + if (this._opcode > 0x07) return this.controlMessage(data); + + if (this._compressed) { + this._state = INFLATING; + this.decompress(data, cb); + return; + } + + if (data.length) { + // + // This message is not compressed so its lenght is the sum of the payload + // length of all fragments. + // + this._messageLength = this._totalPayloadLength; + this._fragments.push(data); + } + + return this.dataMessage(); + } + + /** + * 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) { + return cb(error(RangeError, 'Max payload size exceeded', false, 1009)); + } + + this._fragments.push(buf); + } + + const er = this.dataMessage(); + if (er) return cb(er); + + this.startLoop(cb); + }); + } + + /** + * Handles a data message. + * + * @return {(Error|undefined)} A possible error + * @private + */ + dataMessage () { + if (this._fin) { + const messageLength = this._messageLength; + const fragments = this._fragments; + + this._totalPayloadLength = 0; + this._messageLength = 0; + this._fragmented = 0; + this._fragments = []; + + if (this._opcode === 2) { + var data; + + if (this._binaryType === 'nodebuffer') { + data = toBuffer(fragments, messageLength); + } else if (this._binaryType === 'arraybuffer') { + data = toArrayBuffer(toBuffer(fragments, messageLength)); + } else { + data = fragments; + } + + this.emit('message', data); + } else { + const buf = toBuffer(fragments, messageLength); + + if (!validation.isValidUTF8(buf)) { + this._loop = false; + return error(Error, 'invalid UTF-8 sequence', true, 1007); + } + + this.emit('message', buf.toString()); + } + } + + this._state = GET_INFO; + } + + /** + * Handles a control message. + * + * @param {Buffer} data Data to handle + * @return {(Error|RangeError|undefined)} A possible error + * @private + */ + controlMessage (data) { + if (this._opcode === 0x08) { + this._loop = false; + + if (data.length === 0) { + this.emit('conclude', 1005, ''); + this.end(); + } else if (data.length === 1) { + return error(RangeError, 'invalid payload length 1', true, 1002); + } else { + const code = data.readUInt16BE(0); + + if (!validation.isValidStatusCode(code)) { + return error(RangeError, `invalid status code ${code}`, true, 1002); + } + + const buf = data.slice(2); + + if (!validation.isValidUTF8(buf)) { + return error(Error, 'invalid UTF-8 sequence', true, 1007); + } + + this.emit('conclude', code, buf.toString()); + this.end(); + } + + return; + } + + if (this._opcode === 0x09) this.emit('ping', data); + else this.emit('pong', data); + + this._state = GET_INFO; + } +} + +module.exports = Receiver; + +/** + * Builds an error object. + * + * @param {(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 + * @return {(Error|RangeError)} The error + * @private + */ +function error (ErrorCtor, message, prefix, statusCode) { + const err = new ErrorCtor( + prefix ? `Invalid WebSocket frame: ${message}` : message + ); + + Error.captureStackTrace(err, error); + err[constants.kStatusCode] = statusCode; + return err; +} + +/** + * Makes a buffer from a list of fragments. + * + * @param {Buffer[]} fragments The list of fragments composing the message + * @param {Number} messageLength The length of the message + * @return {Buffer} + * @private + */ +function toBuffer (fragments, messageLength) { + if (fragments.length === 1) return fragments[0]; + if (fragments.length > 1) return bufferUtil.concat(fragments, messageLength); + return constants.EMPTY_BUFFER; +} + +/** + * Converts a buffer to an `ArrayBuffer`. + * + * @param {Buffer} The buffer to convert + * @return {ArrayBuffer} Converted buffer + */ +function toArrayBuffer (buf) { + if (buf.byteOffset === 0 && buf.byteLength === buf.buffer.byteLength) { + return buf.buffer; + } + + return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength); +} diff --git a/node_modules/ws/lib/sender.js b/node_modules/ws/lib/sender.js new file mode 100644 index 0000000..060e553 --- /dev/null +++ b/node_modules/ws/lib/sender.js @@ -0,0 +1,401 @@ +'use strict'; + +const crypto = require('crypto'); + +const PerMessageDeflate = require('./permessage-deflate'); +const bufferUtil = require('./buffer-util'); +const validation = require('./validation'); +const constants = require('./constants'); + +/** + * HyBi Sender implementation. + */ +class Sender { + /** + * Creates a Sender instance. + * + * @param {net.Socket} socket The connection socket + * @param {Object} extensions An object containing the negotiated extensions + */ + constructor (socket, extensions) { + this._extensions = extensions || {}; + this._socket = socket; + + this._firstFragment = true; + this._compress = false; + + this._bufferedBytes = 0; + this._deflating = false; + this._queue = []; + } + + /** + * Frames a piece of data according to the HyBi WebSocket protocol. + * + * @param {Buffer} data The data to frame + * @param {Object} options Options object + * @param {Number} options.opcode The opcode + * @param {Boolean} options.readOnly Specifies whether `data` can be modified + * @param {Boolean} options.fin Specifies whether or not to set the FIN bit + * @param {Boolean} options.mask Specifies whether or not to mask `data` + * @param {Boolean} options.rsv1 Specifies whether or not to set the RSV1 bit + * @return {Buffer[]} The framed data as a list of `Buffer` instances + * @public + */ + static frame (data, options) { + const merge = data.length < 1024 || (options.mask && options.readOnly); + var offset = options.mask ? 6 : 2; + var payloadLength = data.length; + + if (data.length >= 65536) { + offset += 8; + payloadLength = 127; + } else if (data.length > 125) { + offset += 2; + payloadLength = 126; + } + + const target = Buffer.allocUnsafe(merge ? data.length + offset : offset); + + target[0] = options.fin ? options.opcode | 0x80 : options.opcode; + if (options.rsv1) target[0] |= 0x40; + + if (payloadLength === 126) { + target.writeUInt16BE(data.length, 2); + } else if (payloadLength === 127) { + target.writeUInt32BE(0, 2); + target.writeUInt32BE(data.length, 6); + } + + if (!options.mask) { + target[1] = payloadLength; + if (merge) { + data.copy(target, offset); + return [target]; + } + + return [target, data]; + } + + const mask = crypto.randomBytes(4); + + target[1] = payloadLength | 0x80; + target[offset - 4] = mask[0]; + target[offset - 3] = mask[1]; + target[offset - 2] = mask[2]; + target[offset - 1] = mask[3]; + + if (merge) { + bufferUtil.mask(data, mask, target, offset, data.length); + return [target]; + } + + bufferUtil.mask(data, mask, data, 0, data.length); + return [target, data]; + } + + /** + * Sends a close message to the other peer. + * + * @param {(Number|undefined)} code The status code component of the body + * @param {String} data The message component of the body + * @param {Boolean} mask Specifies whether or not to mask the message + * @param {Function} cb Callback + * @public + */ + close (code, data, mask, cb) { + var buf; + + if (code === undefined) { + buf = constants.EMPTY_BUFFER; + } else if (typeof code !== 'number' || !validation.isValidStatusCode(code)) { + throw new TypeError('First argument must be a valid error code number'); + } else if (data === undefined || data === '') { + buf = Buffer.allocUnsafe(2); + buf.writeUInt16BE(code, 0); + } else { + buf = Buffer.allocUnsafe(2 + Buffer.byteLength(data)); + buf.writeUInt16BE(code, 0); + buf.write(data, 2); + } + + if (this._deflating) { + this.enqueue([this.doClose, buf, mask, cb]); + } else { + this.doClose(buf, mask, cb); + } + } + + /** + * Frames and sends a close message. + * + * @param {Buffer} data The message to send + * @param {Boolean} mask Specifies whether or not to mask `data` + * @param {Function} cb Callback + * @private + */ + doClose (data, mask, cb) { + this.sendFrame(Sender.frame(data, { + fin: true, + rsv1: false, + opcode: 0x08, + mask, + readOnly: false + }), cb); + } + + /** + * Sends a ping message to the other peer. + * + * @param {*} data The message to send + * @param {Boolean} mask Specifies whether or not to mask `data` + * @param {Function} cb Callback + * @public + */ + ping (data, mask, cb) { + var readOnly = true; + + if (!Buffer.isBuffer(data)) { + if (data instanceof ArrayBuffer) { + data = Buffer.from(data); + } else if (ArrayBuffer.isView(data)) { + data = viewToBuffer(data); + } else { + data = Buffer.from(data); + readOnly = false; + } + } + + if (this._deflating) { + this.enqueue([this.doPing, data, mask, readOnly, cb]); + } else { + this.doPing(data, mask, readOnly, cb); + } + } + + /** + * Frames and sends a ping message. + * + * @param {*} data The message to send + * @param {Boolean} mask Specifies whether or not to mask `data` + * @param {Boolean} readOnly Specifies whether `data` can be modified + * @param {Function} cb Callback + * @private + */ + doPing (data, mask, readOnly, cb) { + this.sendFrame(Sender.frame(data, { + fin: true, + rsv1: false, + opcode: 0x09, + mask, + readOnly + }), cb); + } + + /** + * Sends a pong message to the other peer. + * + * @param {*} data The message to send + * @param {Boolean} mask Specifies whether or not to mask `data` + * @param {Function} cb Callback + * @public + */ + pong (data, mask, cb) { + var readOnly = true; + + if (!Buffer.isBuffer(data)) { + if (data instanceof ArrayBuffer) { + data = Buffer.from(data); + } else if (ArrayBuffer.isView(data)) { + data = viewToBuffer(data); + } else { + data = Buffer.from(data); + readOnly = false; + } + } + + if (this._deflating) { + this.enqueue([this.doPong, data, mask, readOnly, cb]); + } else { + this.doPong(data, mask, readOnly, cb); + } + } + + /** + * Frames and sends a pong message. + * + * @param {*} data The message to send + * @param {Boolean} mask Specifies whether or not to mask `data` + * @param {Boolean} readOnly Specifies whether `data` can be modified + * @param {Function} cb Callback + * @private + */ + doPong (data, mask, readOnly, cb) { + this.sendFrame(Sender.frame(data, { + fin: true, + rsv1: false, + opcode: 0x0a, + mask, + readOnly + }), cb); + } + + /** + * Sends a data message to the other peer. + * + * @param {*} data The message to send + * @param {Object} options Options object + * @param {Boolean} options.compress Specifies whether or not to compress `data` + * @param {Boolean} options.binary Specifies whether `data` is binary or text + * @param {Boolean} options.fin Specifies whether the fragment is the last one + * @param {Boolean} options.mask Specifies whether or not to mask `data` + * @param {Function} cb Callback + * @public + */ + send (data, options, cb) { + var opcode = options.binary ? 2 : 1; + var rsv1 = options.compress; + var readOnly = true; + + if (!Buffer.isBuffer(data)) { + if (data instanceof ArrayBuffer) { + data = Buffer.from(data); + } else if (ArrayBuffer.isView(data)) { + data = viewToBuffer(data); + } else { + data = Buffer.from(data); + readOnly = false; + } + } + + const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName]; + + if (this._firstFragment) { + this._firstFragment = false; + if (rsv1 && perMessageDeflate) { + rsv1 = data.length >= perMessageDeflate._threshold; + } + this._compress = rsv1; + } else { + rsv1 = false; + opcode = 0; + } + + if (options.fin) this._firstFragment = true; + + if (perMessageDeflate) { + const opts = { + fin: options.fin, + rsv1, + opcode, + mask: options.mask, + readOnly + }; + + if (this._deflating) { + this.enqueue([this.dispatch, data, this._compress, opts, cb]); + } else { + this.dispatch(data, this._compress, opts, cb); + } + } else { + this.sendFrame(Sender.frame(data, { + fin: options.fin, + rsv1: false, + opcode, + mask: options.mask, + readOnly + }), cb); + } + } + + /** + * Dispatches a data message. + * + * @param {Buffer} data The message to send + * @param {Boolean} compress Specifies whether or not to compress `data` + * @param {Object} options Options object + * @param {Number} options.opcode The opcode + * @param {Boolean} options.readOnly Specifies whether `data` can be modified + * @param {Boolean} options.fin Specifies whether or not to set the FIN bit + * @param {Boolean} options.mask Specifies whether or not to mask `data` + * @param {Boolean} options.rsv1 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._deflating = true; + perMessageDeflate.compress(data, options.fin, (_, buf) => { + options.readOnly = false; + this.sendFrame(Sender.frame(buf, options), cb); + this._deflating = false; + this.dequeue(); + }); + } + + /** + * Executes queued send operations. + * + * @private + */ + dequeue () { + while (!this._deflating && this._queue.length) { + const params = this._queue.shift(); + + this._bufferedBytes -= params[1].length; + params[0].apply(this, params.slice(1)); + } + } + + /** + * Enqueues a send operation. + * + * @param {Array} params Send operation parameters. + * @private + */ + enqueue (params) { + this._bufferedBytes += params[1].length; + 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.write(list[0]); + this._socket.write(list[1], cb); + } else { + this._socket.write(list[0], cb); + } + } +} + +module.exports = Sender; + +/** + * Converts an `ArrayBuffer` view into a buffer. + * + * @param {(DataView|TypedArray)} view The view to convert + * @return {Buffer} Converted view + * @private + */ +function viewToBuffer (view) { + const buf = Buffer.from(view.buffer); + + if (view.byteLength !== view.buffer.byteLength) { + return buf.slice(view.byteOffset, view.byteOffset + view.byteLength); + } + + return buf; +} diff --git a/node_modules/ws/lib/validation.js b/node_modules/ws/lib/validation.js new file mode 100644 index 0000000..06269fc --- /dev/null +++ b/node_modules/ws/lib/validation.js @@ -0,0 +1,29 @@ +'use strict'; + +try { + const isValidUTF8 = require('utf-8-validate'); + + exports.isValidUTF8 = typeof isValidUTF8 === 'object' + ? isValidUTF8.Validation.isValidUTF8 // utf-8-validate@<3.0.0 + : isValidUTF8; +} catch (e) /* istanbul ignore next */ { + exports.isValidUTF8 = () => true; +} + +/** + * 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 + */ +exports.isValidStatusCode = (code) => { + return ( + (code >= 1000 && + code <= 1013 && + code !== 1004 && + code !== 1005 && + code !== 1006) || + (code >= 3000 && code <= 4999) + ); +}; diff --git a/node_modules/ws/lib/websocket-server.js b/node_modules/ws/lib/websocket-server.js new file mode 100644 index 0000000..70513ed --- /dev/null +++ b/node_modules/ws/lib/websocket-server.js @@ -0,0 +1,357 @@ +'use strict'; + +const EventEmitter = require('events'); +const crypto = require('crypto'); +const http = require('http'); +const url = require('url'); + +const PerMessageDeflate = require('./permessage-deflate'); +const extension = require('./extension'); +const constants = require('./constants'); +const WebSocket = require('./websocket'); + +/** + * Class representing a WebSocket server. + * + * @extends EventEmitter + */ +class WebSocketServer extends EventEmitter { + /** + * Create a `WebSocketServer` instance. + * + * @param {Object} options Configuration options + * @param {String} options.host The hostname where to bind the server + * @param {Number} options.port The port where to bind the server + * @param {http.Server} options.server A pre-created HTTP/S server to use + * @param {Function} options.verifyClient An hook to reject connections + * @param {Function} options.handleProtocols An hook to handle protocols + * @param {String} options.path Accept only connections matching this path + * @param {Boolean} options.noServer Enable no server mode + * @param {Boolean} options.clientTracking Specifies whether or not to track clients + * @param {(Boolean|Object)} options.perMessageDeflate Enable/disable permessage-deflate + * @param {Number} options.maxPayload The maximum allowed message size + * @param {Function} callback A listener for the `listening` event + */ + constructor (options, callback) { + super(); + + options = Object.assign({ + maxPayload: 100 * 1024 * 1024, + 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 + }, options); + + if (options.port == null && !options.server && !options.noServer) { + throw new TypeError( + '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) { + 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, (ws) => { + this.emit('connection', ws, req); + }); + } + }); + } + + if (options.perMessageDeflate === true) options.perMessageDeflate = {}; + if (options.clientTracking) this.clients = new Set(); + this.options = options; + } + + /** + * 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(); + } + + /** + * Close the server. + * + * @param {Function} cb Callback + * @public + */ + close (cb) { + // + // Terminate all associated clients. + // + if (this.clients) { + for (const client of this.clients) client.terminate(); + } + + const server = this._server; + + if (server) { + this._removeListeners(); + this._removeListeners = this._server = null; + + // + // Close the http server if it was internally created. + // + if (this.options.port != null) return server.close(cb); + } + + if (cb) cb(); + } + + /** + * 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 && url.parse(req.url).pathname !== this.options.path) { + return false; + } + + return true; + } + + /** + * Handle a HTTP Upgrade request. + * + * @param {http.IncomingMessage} req The request object + * @param {net.Socket} 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 version = +req.headers['sec-websocket-version']; + const extensions = {}; + + if ( + req.method !== 'GET' || req.headers.upgrade.toLowerCase() !== 'websocket' || + !req.headers['sec-websocket-key'] || (version !== 8 && version !== 13) || + !this.shouldHandle(req) + ) { + return abortHandshake(socket, 400); + } + + if (this.options.perMessageDeflate) { + const perMessageDeflate = new PerMessageDeflate( + this.options.perMessageDeflate, + true, + this.options.maxPayload + ); + + try { + const offers = extension.parse( + req.headers['sec-websocket-extensions'] + ); + + if (offers[PerMessageDeflate.extensionName]) { + perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]); + extensions[PerMessageDeflate.extensionName] = perMessageDeflate; + } + } catch (err) { + return abortHandshake(socket, 400); + } + } + + // + // Optionally call external client verification handler. + // + if (this.options.verifyClient) { + const info = { + origin: req.headers[`${version === 8 ? 'sec-websocket-origin' : 'origin'}`], + secure: !!(req.connection.authorized || req.connection.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, req, socket, head, cb); + }); + return; + } + + if (!this.options.verifyClient(info)) return abortHandshake(socket, 401); + } + + this.completeUpgrade(extensions, req, socket, head, cb); + } + + /** + * Upgrade the connection to WebSocket. + * + * @param {Object} extensions The accepted extensions + * @param {http.IncomingMessage} req The request object + * @param {net.Socket} socket The network socket between the server and client + * @param {Buffer} head The first packet of the upgraded stream + * @param {Function} cb Callback + * @private + */ + completeUpgrade (extensions, req, socket, head, cb) { + // + // Destroy the socket if the client has already sent a FIN packet. + // + if (!socket.readable || !socket.writable) return socket.destroy(); + + const key = crypto.createHash('sha1') + .update(req.headers['sec-websocket-key'] + constants.GUID, 'binary') + .digest('base64'); + + const headers = [ + 'HTTP/1.1 101 Switching Protocols', + 'Upgrade: websocket', + 'Connection: Upgrade', + `Sec-WebSocket-Accept: ${key}` + ]; + + const ws = new WebSocket(null); + var protocol = req.headers['sec-websocket-protocol']; + + if (protocol) { + protocol = protocol.trim().split(/ *, */); + + // + // Optionally call external protocol selection handler. + // + if (this.options.handleProtocols) { + protocol = this.options.handleProtocols(protocol, req); + } else { + protocol = protocol[0]; + } + + 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, this.options.maxPayload); + + if (this.clients) { + this.clients.add(ws); + ws.on('close', () => this.clients.delete(ws)); + } + + cb(ws); + } +} + +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]); + } + }; +} + +/** + * Handle premature socket errors. + * + * @private + */ +function socketOnError () { + this.destroy(); +} + +/** + * Close the connection when preconditions are not fulfilled. + * + * @param {net.Socket} 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) { + if (socket.writable) { + message = message || http.STATUS_CODES[code]; + headers = Object.assign({ + 'Connection': 'close', + 'Content-type': 'text/html', + 'Content-Length': Buffer.byteLength(message) + }, headers); + + socket.write( + `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 + ); + } + + socket.removeListener('error', socketOnError); + socket.destroy(); +} diff --git a/node_modules/ws/lib/websocket.js b/node_modules/ws/lib/websocket.js new file mode 100644 index 0000000..92cb0f8 --- /dev/null +++ b/node_modules/ws/lib/websocket.js @@ -0,0 +1,827 @@ +'use strict'; + +const EventEmitter = require('events'); +const crypto = require('crypto'); +const https = require('https'); +const http = require('http'); +const net = require('net'); +const tls = require('tls'); +const url = require('url'); + +const PerMessageDeflate = require('./permessage-deflate'); +const EventTarget = require('./event-target'); +const extension = require('./extension'); +const constants = require('./constants'); +const Receiver = require('./receiver'); +const Sender = require('./sender'); + +const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED']; +const kWebSocket = constants.kWebSocket; +const protocolVersions = [8, 13]; +const closeTimeout = 30 * 1000; // Allow 30 seconds to terminate the connection cleanly. + +/** + * Class representing a WebSocket. + * + * @extends EventEmitter + */ +class WebSocket extends EventEmitter { + /** + * Create a new `WebSocket`. + * + * @param {(String|url.Url|url.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.readyState = WebSocket.CONNECTING; + this.protocol = ''; + + this._binaryType = constants.BINARY_TYPES[0]; + this._closeFrameReceived = false; + this._closeFrameSent = false; + this._closeMessage = ''; + this._closeTimer = null; + this._closeCode = 1006; + this._extensions = {}; + this._isServer = true; + this._receiver = null; + this._sender = null; + this._socket = null; + + if (address !== null) { + if (Array.isArray(protocols)) { + protocols = protocols.join(', '); + } else if (typeof protocols === 'object' && protocols !== null) { + options = protocols; + protocols = undefined; + } + + initAsClient.call(this, address, protocols, options); + } + } + + get CONNECTING () { return WebSocket.CONNECTING; } + get CLOSING () { return WebSocket.CLOSING; } + get CLOSED () { return WebSocket.CLOSED; } + get OPEN () { return WebSocket.OPEN; } + + /** + * This deviates from the WHATWG interface since ws doesn't support the required + * default "blob" type (instead we define a custom "nodebuffer" type). + * + * @type {String} + */ + get binaryType () { + return this._binaryType; + } + + set binaryType (type) { + if (constants.BINARY_TYPES.indexOf(type) < 0) 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 0; + + // + // `socket.bufferSize` is `undefined` if the socket is closed. + // + return (this._socket.bufferSize || 0) + this._sender._bufferedBytes; + } + + /** + * @type {String} + */ + get extensions () { + return Object.keys(this._extensions).join(); + } + + /** + * Set up the socket and the internal resources. + * + * @param {net.Socket} socket The network socket between the server and client + * @param {Buffer} head The first packet of the upgraded stream + * @param {Number} maxPayload The maximum allowed message size + * @private + */ + setSocket (socket, head, maxPayload) { + const receiver = new Receiver( + this._binaryType, + this._extensions, + maxPayload + ); + + this._sender = new Sender(socket, this._extensions); + this._receiver = receiver; + this._socket = socket; + + receiver[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); + + socket.setTimeout(0); + 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 () { + this.readyState = WebSocket.CLOSED; + + if (!this._socket) { + this.emit('close', this._closeCode, this._closeMessage); + return; + } + + if (this._extensions[PerMessageDeflate.extensionName]) { + this._extensions[PerMessageDeflate.extensionName].cleanup(); + } + + this._receiver.removeAllListeners(); + 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} data A string explaining 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'; + return abortHandshake(this, this._req, msg); + } + + if (this.readyState === WebSocket.CLOSING) { + if (this._closeFrameSent && this._closeFrameReceived) 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._socket.writable) { + if (this._closeFrameReceived) this._socket.end(); + + // + // Ensure that the connection is closed even if the closing handshake + // fails. + // + this._closeTimer = setTimeout( + this._socket.destroy.bind(this._socket), + closeTimeout + ); + } + }); + } + + /** + * 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 (typeof data === 'function') { + cb = data; + data = mask = undefined; + } else if (typeof mask === 'function') { + cb = mask; + mask = undefined; + } + + if (this.readyState !== WebSocket.OPEN) { + const err = new Error( + `WebSocket is not open: readyState ${this.readyState} ` + + `(${readyStates[this.readyState]})` + ); + + if (cb) return cb(err); + throw err; + } + + if (typeof data === 'number') data = data.toString(); + if (mask === undefined) mask = !this._isServer; + this._sender.ping(data || constants.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 (typeof data === 'function') { + cb = data; + data = mask = undefined; + } else if (typeof mask === 'function') { + cb = mask; + mask = undefined; + } + + if (this.readyState !== WebSocket.OPEN) { + const err = new Error( + `WebSocket is not open: readyState ${this.readyState} ` + + `(${readyStates[this.readyState]})` + ); + + if (cb) return cb(err); + throw err; + } + + if (typeof data === 'number') data = data.toString(); + if (mask === undefined) mask = !this._isServer; + this._sender.pong(data || constants.EMPTY_BUFFER, mask, cb); + } + + /** + * Send a data message. + * + * @param {*} data The message to send + * @param {Object} options Options object + * @param {Boolean} options.compress Specifies whether or not to compress `data` + * @param {Boolean} options.binary Specifies whether `data` is binary or text + * @param {Boolean} options.fin 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 (typeof options === 'function') { + cb = options; + options = {}; + } + + if (this.readyState !== WebSocket.OPEN) { + const err = new Error( + `WebSocket is not open: readyState ${this.readyState} ` + + `(${readyStates[this.readyState]})` + ); + + if (cb) return cb(err); + throw err; + } + + if (typeof data === 'number') data = data.toString(); + + const opts = Object.assign({ + binary: typeof data !== 'string', + mask: !this._isServer, + compress: true, + fin: true + }, options); + + if (!this._extensions[PerMessageDeflate.extensionName]) { + opts.compress = false; + } + + this._sender.send(data || constants.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'; + return abortHandshake(this, this._req, msg); + } + + if (this._socket) { + this.readyState = WebSocket.CLOSING; + this._socket.destroy(); + } + } +} + +readyStates.forEach((readyState, i) => { + WebSocket[readyStates[i]] = i; +}); + +// +// 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}`, { + /** + * Return the listener of the event. + * + * @return {(Function|undefined)} The event listener or `undefined` + * @public + */ + get () { + const listeners = this.listeners(method); + for (var i = 0; i < listeners.length; i++) { + if (listeners[i]._listener) return listeners[i]._listener; + } + }, + /** + * Add a listener for the event. + * + * @param {Function} listener The listener to add + * @public + */ + set (listener) { + const listeners = this.listeners(method); + for (var i = 0; i < listeners.length; i++) { + // + // Remove only the listeners added via `addEventListener`. + // + if (listeners[i]._listener) this.removeListener(method, listeners[i]); + } + this.addEventListener(method, listener); + } + }); +}); + +WebSocket.prototype.addEventListener = EventTarget.addEventListener; +WebSocket.prototype.removeEventListener = EventTarget.removeEventListener; + +module.exports = WebSocket; + +/** + * Initialize a WebSocket client. + * + * @param {(String|url.Url|url.URL)} address The URL to which to connect + * @param {String} protocols The subprotocols + * @param {Object} options Connection options + * @param {(Boolean|Object)} options.perMessageDeflate Enable/disable permessage-deflate + * @param {Number} options.handshakeTimeout Timeout in milliseconds for the handshake request + * @param {Number} options.protocolVersion Value of the `Sec-WebSocket-Version` header + * @param {String} options.origin Value of the `Origin` or `Sec-WebSocket-Origin` header + * @param {Number} options.maxPayload The maximum allowed message size + * @private + */ +function initAsClient (address, protocols, options) { + options = Object.assign({ + protocolVersion: protocolVersions[1], + perMessageDeflate: true, + maxPayload: 100 * 1024 * 1024 + }, options, { + createConnection: undefined, + socketPath: undefined, + hostname: undefined, + protocol: undefined, + timeout: undefined, + method: undefined, + auth: undefined, + host: undefined, + path: undefined, + port: undefined + }); + + if (protocolVersions.indexOf(options.protocolVersion) === -1) { + throw new RangeError( + `Unsupported protocol version: ${options.protocolVersion} ` + + `(supported versions: ${protocolVersions.join(', ')})` + ); + } + + this._isServer = false; + + var parsedUrl; + + if (typeof address === 'object' && address.href !== undefined) { + parsedUrl = address; + this.url = address.href; + } else { + parsedUrl = url.parse(address); + this.url = address; + } + + const isUnixSocket = parsedUrl.protocol === 'ws+unix:'; + + if (!parsedUrl.host && (!isUnixSocket || !parsedUrl.pathname)) { + throw new Error(`Invalid URL: ${this.url}`); + } + + const isSecure = parsedUrl.protocol === 'wss:' || parsedUrl.protocol === 'https:'; + const key = crypto.randomBytes(16).toString('base64'); + const httpObj = isSecure ? https : http; + const path = parsedUrl.search + ? `${parsedUrl.pathname || '/'}${parsedUrl.search}` + : parsedUrl.pathname || '/'; + var perMessageDeflate; + + options.createConnection = isSecure ? tlsConnect : netConnect; + options.port = parsedUrl.port || (isSecure ? 443 : 80); + options.host = parsedUrl.hostname.startsWith('[') + ? parsedUrl.hostname.slice(1, -1) + : parsedUrl.hostname; + options.headers = Object.assign({ + 'Sec-WebSocket-Version': options.protocolVersion, + 'Sec-WebSocket-Key': key, + 'Connection': 'Upgrade', + 'Upgrade': 'websocket' + }, options.headers); + options.path = path; + + if (options.perMessageDeflate) { + perMessageDeflate = new PerMessageDeflate( + options.perMessageDeflate !== true ? options.perMessageDeflate : {}, + false, + options.maxPayload + ); + options.headers['Sec-WebSocket-Extensions'] = extension.format({ + [PerMessageDeflate.extensionName]: perMessageDeflate.offer() + }); + } + if (protocols) { + options.headers['Sec-WebSocket-Protocol'] = protocols; + } + if (options.origin) { + if (options.protocolVersion < 13) { + options.headers['Sec-WebSocket-Origin'] = options.origin; + } else { + options.headers.Origin = options.origin; + } + } + if (parsedUrl.auth) { + options.auth = parsedUrl.auth; + } else if (parsedUrl.username || parsedUrl.password) { + options.auth = `${parsedUrl.username}:${parsedUrl.password}`; + } + + if (isUnixSocket) { + const parts = path.split(':'); + + options.socketPath = parts[0]; + options.path = parts[1]; + } + + var req = this._req = httpObj.get(options); + + if (options.handshakeTimeout) { + req.setTimeout( + options.handshakeTimeout, + () => abortHandshake(this, req, 'Opening handshake has timed out') + ); + } + + req.on('error', (err) => { + if (this._req.aborted) return; + + req = this._req = null; + this.readyState = WebSocket.CLOSING; + this.emit('error', err); + this.emitClose(); + }); + + req.on('response', (res) => { + if (this.emit('unexpected-response', req, res)) return; + + abortHandshake(this, req, `Unexpected server response: ${res.statusCode}`); + }); + + req.on('upgrade', (res, socket, head) => { + this.emit('upgrade', res); + + // + // The user may have closed the connection from a listener of the `upgrade` + // event. + // + if (this.readyState !== WebSocket.CONNECTING) return; + + req = this._req = null; + + const digest = crypto.createHash('sha1') + .update(key + constants.GUID, 'binary') + .digest('base64'); + + if (res.headers['sec-websocket-accept'] !== digest) { + abortHandshake(this, socket, 'Invalid Sec-WebSocket-Accept header'); + return; + } + + const serverProt = res.headers['sec-websocket-protocol']; + const protList = (protocols || '').split(/, */); + var protError; + + if (!protocols && serverProt) { + protError = 'Server sent a subprotocol but none was requested'; + } else if (protocols && !serverProt) { + protError = 'Server sent no subprotocol'; + } else if (serverProt && protList.indexOf(serverProt) === -1) { + protError = 'Server sent an invalid subprotocol'; + } + + if (protError) { + abortHandshake(this, socket, protError); + return; + } + + if (serverProt) this.protocol = serverProt; + + if (perMessageDeflate) { + try { + const extensions = extension.parse( + res.headers['sec-websocket-extensions'] + ); + + if (extensions[PerMessageDeflate.extensionName]) { + perMessageDeflate.accept( + extensions[PerMessageDeflate.extensionName] + ); + this._extensions[PerMessageDeflate.extensionName] = perMessageDeflate; + } + } catch (err) { + abortHandshake(this, socket, 'Invalid Sec-WebSocket-Extensions header'); + return; + } + } + + this.setSocket(socket, head, options.maxPayload); + }); +} + +/** + * 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) { + // + // Override `options.path` only if `options` is a copy of the original options + // object. This is always true on Node.js >= 8 but not on Node.js 6 where + // `options.socketPath` might be `undefined` even if the `socketPath` option + // was originally set. + // + if (options.protocolVersion) 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; + options.servername = options.servername || options.host; + return tls.connect(options); +} + +/** + * Abort the handshake and emit an error. + * + * @param {WebSocket} websocket The WebSocket instance + * @param {(http.ClientRequest|net.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.abort(); + stream.once('abort', websocket.emitClose.bind(websocket)); + websocket.emit('error', err); + } else { + stream.destroy(err); + stream.once('error', websocket.emit.bind(websocket, 'error')); + stream.once('close', websocket.emitClose.bind(websocket)); + } +} + +/** + * The listener of the `Receiver` `'conclude'` event. + * + * @param {Number} code The status code + * @param {String} reason The reason for closing + * @private + */ +function receiverOnConclude (code, reason) { + const websocket = this[kWebSocket]; + + websocket._socket.removeListener('data', socketOnData); + websocket._socket.resume(); + + websocket._closeFrameReceived = true; + websocket._closeMessage = reason; + websocket._closeCode = code; + + if (code === 1005) websocket.close(); + else websocket.close(code, reason); +} + +/** + * The listener of the `Receiver` `'drain'` event. + * + * @private + */ +function receiverOnDrain () { + this[kWebSocket]._socket.resume(); +} + +/** + * The listener of the `Receiver` `'error'` event. + * + * @param {(RangeError|Error)} err The emitted error + * @private + */ +function receiverOnError (err) { + const websocket = this[kWebSocket]; + + websocket._socket.removeListener('data', socketOnData); + + websocket.readyState = WebSocket.CLOSING; + websocket._closeCode = err[constants.kStatusCode]; + websocket.emit('error', err); + websocket._socket.destroy(); +} + +/** + * The listener of the `Receiver` `'finish'` event. + * + * @private + */ +function receiverOnFinish () { + this[kWebSocket].emitClose(); +} + +/** + * The listener of the `Receiver` `'message'` event. + * + * @param {(String|Buffer|ArrayBuffer|Buffer[])} data The message + * @private + */ +function receiverOnMessage (data) { + this[kWebSocket].emit('message', data); +} + +/** + * 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]; + + websocket.pong(data, !websocket._isServer, constants.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); +} + +/** + * The listener of the `net.Socket` `'close'` event. + * + * @private + */ +function socketOnClose () { + const websocket = this[kWebSocket]; + + this.removeListener('close', socketOnClose); + this.removeListener('end', socketOnEnd); + + websocket.readyState = WebSocket.CLOSING; + + // + // 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 and emitted synchronously in a single + // `'data'` event. + // + websocket._socket.read(); + websocket._receiver.end(); + + this.removeListener('data', socketOnData); + 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 `net.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 `net.Socket` `'end'` event. + * + * @private + */ +function socketOnEnd () { + const websocket = this[kWebSocket]; + + websocket.readyState = WebSocket.CLOSING; + websocket._receiver.end(); + this.end(); +} + +/** + * The listener of the `net.Socket` `'error'` event. + * + * @private + */ +function socketOnError () { + const websocket = this[kWebSocket]; + + this.removeListener('error', socketOnError); + this.on('error', constants.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..9022497 --- /dev/null +++ b/node_modules/ws/package.json @@ -0,0 +1,80 @@ +{ + "_from": "ws@^6.0.0", + "_id": "ws@6.0.0", + "_inBundle": false, + "_integrity": "sha512-c2UlYcAZp1VS8AORtpq6y4RJIkJ9dQz18W32SpR/qXGfLDZ2jU4y4wKvvZwqbi7U6gxFQTeE+urMbXU/tsDy4w==", + "_location": "/ws", + "_phantomChildren": {}, + "_requested": { + "type": "range", + "registry": true, + "raw": "ws@^6.0.0", + "name": "ws", + "escapedName": "ws", + "rawSpec": "^6.0.0", + "saveSpec": null, + "fetchSpec": "^6.0.0" + }, + "_requiredBy": [ + "/" + ], + "_resolved": "https://registry.npmjs.org/ws/-/ws-6.0.0.tgz", + "_shasum": "eaa494aded00ac4289d455bac8d84c7c651cef35", + "_spec": "ws@^6.0.0", + "_where": "/usr/share/cybafelo/r3-websocket", + "author": { + "name": "Einar Otto Stangvik", + "email": "einaros@gmail.com", + "url": "http://2x.io" + }, + "browser": "browser.js", + "bugs": { + "url": "https://github.com/websockets/ws/issues" + }, + "bundleDependencies": false, + "dependencies": { + "async-limiter": "~1.0.0" + }, + "deprecated": false, + "description": "Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js", + "devDependencies": { + "benchmark": "~2.1.2", + "bufferutil": "~4.0.0", + "eslint": "~5.0.0", + "eslint-config-standard": "~11.0.0", + "eslint-plugin-import": "~2.13.0", + "eslint-plugin-node": "~7.0.0", + "eslint-plugin-promise": "~3.8.0", + "eslint-plugin-standard": "~3.1.0", + "mocha": "~5.2.0", + "nyc": "~12.0.2", + "utf-8-validate": "~5.0.0" + }, + "files": [ + "browser.js", + "index.js", + "lib" + ], + "homepage": "https://github.com/websockets/ws", + "keywords": [ + "HyBi", + "Push", + "RFC-6455", + "WebSocket", + "WebSockets", + "real-time" + ], + "license": "MIT", + "main": "index.js", + "name": "ws", + "repository": { + "type": "git", + "url": "git+https://github.com/websockets/ws.git" + }, + "scripts": { + "integration": "eslint . && mocha test/*.integration.js", + "lint": "eslint .", + "test": "eslint . && nyc --reporter=html --reporter=text mocha test/*.test.js" + }, + "version": "6.0.0" +} diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..5df8c81 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,21 @@ +{ + "name": "r3-websocket", + "version": "0.0.1", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "async-limiter": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz", + "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg==" + }, + "ws": { + "version": "6.0.0", + "resolved": "https://registry.npmjs.org/ws/-/ws-6.0.0.tgz", + "integrity": "sha512-c2UlYcAZp1VS8AORtpq6y4RJIkJ9dQz18W32SpR/qXGfLDZ2jU4y4wKvvZwqbi7U6gxFQTeE+urMbXU/tsDy4w==", + "requires": { + "async-limiter": "1.0.0" + } + } + } +} diff --git a/package.json b/package.json new file mode 100644 index 0000000..f45f7c0 --- /dev/null +++ b/package.json @@ -0,0 +1,7 @@ +{ + "name": "r3-websocket", + "version": "0.0.1", + "dependencies": { + "ws": "^6.0.0" + } +} diff --git a/r3.js b/r3.js new file mode 120000 index 0000000..4634a9d --- /dev/null +++ b/r3.js @@ -0,0 +1 @@ +../r3/build/r3.js \ No newline at end of file