├── src
    ├── defaults.ts
    ├── globals.d.ts
    ├── browser.ts
    ├── Client.test.ts
    ├── index.ts
    ├── Channel.ts
    ├── ReconnectingWebSocket.ts
    ├── Client.ts
    └── Server.ts
├── typedoc.json
├── .gitignore
├── media
    ├── internals.png
    ├── osc-apps.png
    ├── osc-apps.excalidraw
    ├── osc-apps.svg
    └── internals.excalidraw
├── tslint.json
├── jest.config.js
├── tsconfig.json
├── webpack.dev.js
├── webpack.prod.js
├── bin
    └── browserglue.js
├── .github
    └── workflows
    │   ├── package.yml
    │   └── main.yml
├── webpack.common.js
├── package.json
├── devserver.js
├── dist
    └── index.html
├── CODE_OF_CONDUCT.md
├── README.md
├── .eslintrc.js
└── LICENSE.txt


/src/defaults.ts:
--------------------------------------------------------------------------------
1 | const DEFAULT_PORT = 45678;
2 | 
3 | export { DEFAULT_PORT };
4 | 


--------------------------------------------------------------------------------
/typedoc.json:
--------------------------------------------------------------------------------
1 | {
2 |   "entryPoints": ["src/index.ts"],
3 |   "out": "docs"
4 | }
5 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | /node_modules/
2 | /dist/*.js*
3 | /docs/
4 | .vscode/
5 | .eslintcache
6 | 


--------------------------------------------------------------------------------
/media/internals.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/munshkr/browserglue/HEAD/media/internals.png


--------------------------------------------------------------------------------
/media/osc-apps.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/munshkr/browserglue/HEAD/media/osc-apps.png


--------------------------------------------------------------------------------
/tslint.json:
--------------------------------------------------------------------------------
1 | {
2 |   "extends": ["tslint:recommended", "tslint-config-prettier"]
3 | }
4 | 


--------------------------------------------------------------------------------
/src/globals.d.ts:
--------------------------------------------------------------------------------
1 | /* eslint-disable no-underscore-dangle */
2 | /* eslint-disable @typescript-eslint/naming-convention */
3 | declare let __VERSION__: string;
4 | 


--------------------------------------------------------------------------------
/src/browser.ts:
--------------------------------------------------------------------------------
1 | import Client from "./Client";
2 | import Channel from "./Channel";
3 | import { Message, Bundle } from "osc-js";
4 | 
5 | const version = __VERSION__;
6 | 
7 | export { Client, Channel, Message, Bundle, version };
8 | 


--------------------------------------------------------------------------------
/jest.config.js:
--------------------------------------------------------------------------------
 1 | module.exports = {
 2 |   "roots": [
 3 |     "<rootDir>/src"
 4 |   ],
 5 |   "testMatch": [
 6 |     "**/__tests__/**/*.+(ts|tsx|js)",
 7 |     "**/?(*.)+(spec|test).+(ts|tsx|js)"
 8 |   ],
 9 |   "transform": {
10 |     "^.+\\.(ts|tsx)$": "ts-jest"
11 |   },
12 | }
13 | 


--------------------------------------------------------------------------------
/src/Client.test.ts:
--------------------------------------------------------------------------------
1 | import Client from "./Client";
2 | // import WebSocket from 'isomorphic-ws';
3 | 
4 | test("constructor", () => {
5 |   const client = new Client();
6 |   expect(client.url).toBe("ws://localhost:8000");
7 |   // const ws = new WebSocket('ws://localhost:8000');
8 | });
9 | 


--------------------------------------------------------------------------------
/tsconfig.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "compilerOptions": {
 3 |     "allowJs": true,
 4 |     "target": "es5",
 5 |     "module": "es6",
 6 |     "moduleResolution": "node",
 7 |     "esModuleInterop": true,
 8 |     "outDir": "./lib"
 9 |   },
10 |   "include": [
11 |     "./.eslintrc.js",
12 |     "./*",
13 |     "./src/**/*"
14 |   ]
15 | }
16 | 


--------------------------------------------------------------------------------
/src/index.ts:
--------------------------------------------------------------------------------
 1 | /* eslint-disable @typescript-eslint/naming-convention */
 2 | /* eslint-disable @typescript-eslint/no-unsafe-assignment */
 3 | import Client from "./Client";
 4 | import Channel from "./Channel";
 5 | import Server from "./Server";
 6 | import * as defaults from "./defaults";
 7 | import { Message, Bundle } from "osc-js";
 8 | 
 9 | const version = __VERSION__;
10 | 
11 | export { Client, Channel, Server, Message, Bundle, version, defaults };
12 | 


--------------------------------------------------------------------------------
/webpack.dev.js:
--------------------------------------------------------------------------------
 1 | const { merge } = require('webpack-merge');
 2 | const [commonNodeConfig, commonBrowserConfig] = require('./webpack.common.js');
 3 | 
 4 | const developmentConfig = {
 5 |   mode: 'development',
 6 |   devtool: 'inline-source-map',
 7 | }
 8 | 
 9 | const nodeConfig = merge(commonNodeConfig, developmentConfig);
10 | const browserConfig = merge(commonBrowserConfig, developmentConfig);
11 | 
12 | module.exports = [nodeConfig, browserConfig];
13 | 


--------------------------------------------------------------------------------
/webpack.prod.js:
--------------------------------------------------------------------------------
 1 | const process = require('process');
 2 | const { merge } = require('webpack-merge');
 3 | const [commonNodeConfig, commonBrowserConfig] = require('./webpack.common.js');
 4 | 
 5 | const productionConfig = {
 6 |   mode: 'production',
 7 |   devtool: 'source-map',
 8 | }
 9 | 
10 | const nodeConfig = merge(commonNodeConfig, productionConfig);
11 | const browserConfig = merge(commonBrowserConfig, productionConfig);
12 | 
13 | module.exports = [nodeConfig, browserConfig];
14 | 


--------------------------------------------------------------------------------
/bin/browserglue.js:
--------------------------------------------------------------------------------
 1 | #!/usr/bin/env node
 2 | const program = require("commander");
 3 | const packageInfo = require("../package.json");
 4 | const { Server, defaults } = require("../dist/browserglue.node");
 5 | const debug = require("debug")("browserglue");
 6 | 
 7 | const { DEFAULT_PORT } = defaults;
 8 | 
 9 | program
10 |   .version(packageInfo.version)
11 |   .option("-H, --host <name>", "WebSockets binding host", "localhost")
12 |   .option("-P, --port <number>", "WebSockets port number", DEFAULT_PORT)
13 |   .parse(process.argv);
14 | 
15 | const options = program.opts();
16 | 
17 | debug("Create server and connect to %s:%d", options.host, options.port);
18 | const server = new Server({
19 |   host: options.host,
20 |   port: options.port,
21 | });
22 | 
23 | server.on("listening", () => {
24 |   process.stderr.write(`Server listening on ${server.host}:${server.port}\n`);
25 | });
26 | 
27 | debug("Start server");
28 | server.start();
29 | 


--------------------------------------------------------------------------------
/.github/workflows/package.yml:
--------------------------------------------------------------------------------
 1 | # This is a basic workflow to help you get started with Actions
 2 | 
 3 | name: CD
 4 | 
 5 | on:
 6 |   push:
 7 |    tags:
 8 |    - 'v*'
 9 | 
10 | jobs:
11 |   build-and-release:
12 |     runs-on: ubuntu-latest
13 | 
14 |     steps:
15 |       - uses: actions/checkout@v2
16 |       
17 |       - name: Setup Node.js environment
18 |         uses: actions/setup-node@v2.1.5
19 | 
20 |       - name: Install dependencies
21 |         run: yarn install
22 |         
23 |       - name: Build library
24 |         run: yarn build
25 |         
26 |       - name: Package binaries
27 |         run: npx pkg .
28 |         
29 |       - name: Create Release
30 |         uses: softprops/action-gh-release@v1
31 |         with:
32 |           files: |
33 |             browserglue-linux
34 |             browserglue-macos
35 |             browserglue-win.exe
36 |         env:
37 |           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
38 | 


--------------------------------------------------------------------------------
/.github/workflows/main.yml:
--------------------------------------------------------------------------------
 1 | # This is a basic workflow to help you get started with Actions
 2 | 
 3 | name: CI
 4 | 
 5 | # Controls when the action will run. 
 6 | on:
 7 |   # Triggers the workflow on push or pull request events but only for the main branch
 8 |   push:
 9 |     branches: [ main ]
10 |   pull_request:
11 |     branches: [ main ]
12 | 
13 |   # Allows you to run this workflow manually from the Actions tab
14 |   workflow_dispatch:
15 | 
16 | # A workflow run is made up of one or more jobs that can run sequentially or in parallel
17 | jobs:
18 |   # This workflow contains a single job called "build"
19 |   build:
20 |     # The type of runner that the job will run on
21 |     runs-on: ubuntu-latest
22 | 
23 |     # Steps represent a sequence of tasks that will be executed as part of the job
24 |     steps:
25 |       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
26 |       - uses: actions/checkout@v2
27 |       
28 |       - name: Setup Node.js environment
29 |         uses: actions/setup-node@v2.1.5
30 | 
31 |       - name: Install dependencies
32 |         run: yarn install
33 | 
34 |       - name: Run tests
35 |         run: yarn test
36 | 


--------------------------------------------------------------------------------
/webpack.common.js:
--------------------------------------------------------------------------------
 1 | const path = require("path");
 2 | const webpack = require("webpack");
 3 | const nodeExternals = require('webpack-node-externals');
 4 | 
 5 | const plugins = [
 6 |   new webpack.DefinePlugin({
 7 |     __VERSION__: JSON.stringify(require("./package.json").version)
 8 |   })
 9 | ]
10 | 
11 | const nodeConfig = {
12 |   target: "node",
13 |   entry: "./src/index.ts",
14 |   module: {
15 |     rules: [
16 |       {
17 |         test: /\.ts$/,
18 |         use: "ts-loader",
19 |         exclude: /node_modules/,
20 |       },
21 |     ],
22 |   },
23 |   resolve: {
24 |     extensions: [".ts", ".js"],
25 |   },
26 |   externals: [nodeExternals()],
27 |   plugins,
28 |   output: {
29 |     path: path.resolve(__dirname, "dist"),
30 |     filename: "browserglue.node.js",
31 |     library: "browserglue",
32 |     libraryTarget: "umd",
33 |     publicPath: "/",
34 |   },
35 | };
36 | 
37 | const browserConfig = {
38 |   target: "web",
39 |   mode: "production",
40 |   entry: "./src/browser.ts",
41 |   module: {
42 |     rules: [
43 |       {
44 |         test: /\.ts$/,
45 |         use: "ts-loader",
46 |         exclude: /node_modules/,
47 |       },
48 |     ],
49 |   },
50 |   resolve: {
51 |     extensions: [".ts", ".js"],
52 |     fallback: {
53 |       dgram: false, // do not include a polyfill for dgram
54 |     },
55 |   },
56 |   plugins,
57 |   output: {
58 |     path: path.resolve(__dirname, "dist"),
59 |     filename: "browserglue.js",
60 |     library: "browserglue",
61 |     libraryTarget: "umd",
62 |     publicPath: "/",
63 |   },
64 | };
65 | 
66 | module.exports = [nodeConfig, browserConfig];
67 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "browserglue",
 3 |   "version": "0.2.2",
 4 |   "author": "Damián Silvani <munshkr@gmail.com>",
 5 |   "license": "AGPL-3.0-or-later",
 6 |   "description": "Exposes TCP/UDP connections to the browser through WebSockets",
 7 |   "repository": "https://github.com/munshkr/browserglue",
 8 |   "main": "dist/browserglue.node.js",
 9 |   "browser": "dist/browserglue.js",
10 |   "files": [
11 |     "bin/*",
12 |     "dist/*"
13 |   ],
14 |   "scripts": {
15 |     "dev": "node devserver.js",
16 |     "build": "webpack --config webpack.prod.js",
17 |     "lint": "eslint --fix",
18 |     "test": "exit 0",
19 |     "docs": "typedoc --media media/"
20 |   },
21 |   "bin": {
22 |     "browserglue": "./bin/browserglue.js"
23 |   },
24 |   "devDependencies": {
25 |     "@types/debug": "^4.1.5",
26 |     "@types/jest": "^26.0.20",
27 |     "@types/node": "^14.14.27",
28 |     "@types/ws": "^7.4.0",
29 |     "@typescript-eslint/eslint-plugin": "^4.15.2",
30 |     "@typescript-eslint/parser": "^4.15.2",
31 |     "eslint": "^7.20.0",
32 |     "eslint-config-prettier": "^8.1.0",
33 |     "eslint-plugin-jsdoc": "^32.2.0",
34 |     "eslint-plugin-prefer-arrow": "^1.2.3",
35 |     "eslint-plugin-prettier": "^3.3.1",
36 |     "jest": "^26.6.3",
37 |     "prettier": "^2.2.1",
38 |     "ts-jest": "^26.5.3",
39 |     "ts-loader": "^8.0.17",
40 |     "typedoc": "^0.20.30",
41 |     "typescript": "^4.1.5",
42 |     "webpack": "^5.24.2",
43 |     "webpack-cli": "^4.5.0",
44 |     "webpack-dev-middleware": "^4.1.0",
45 |     "webpack-merge": "^5.7.3",
46 |     "webpack-node-externals": "^2.5.2"
47 |   },
48 |   "dependencies": {
49 |     "body-parser": "^1.19.0",
50 |     "commander": "^7.0.0",
51 |     "cors": "^2.8.5",
52 |     "debug": "^4.3.1",
53 |     "events": "^3.2.0",
54 |     "express": "^4.17.1",
55 |     "isomorphic-ws": "^4.0.1",
56 |     "json-rpc-2.0": "^0.2.15",
57 |     "osc-js": "^2.3.0",
58 |     "ws": "^7.4.3"
59 |   },
60 |   "optionalDependencies": {
61 |     "bufferutil": "^4.0.3",
62 |     "utf-8-validate": "^5.0.4"
63 |   }
64 | }
65 | 


--------------------------------------------------------------------------------
/devserver.js:
--------------------------------------------------------------------------------
 1 | const { spawn } = require('child_process');
 2 | const express = require('express');
 3 | const webpack = require('webpack');
 4 | const middleware = require('webpack-dev-middleware');
 5 | 
 6 | const app = express();
 7 | const [nodeConfig, browserConfig] = require('./webpack.prod.js');
 8 | 
 9 | /**
10 |  * Node
11 |  */
12 | const nodeCompiler = webpack(nodeConfig);
13 | 
14 | // Start middleware. Use writeToDisk because bin/browserglue.js requires the bundle on dist/
15 | middleware(nodeCompiler, { writeToDisk: true });
16 | 
17 | const spawnBrowserglueBinary = () => {
18 |   console.log('* Spawn Browserglue child process')
19 |   const bin = spawn('./bin/browserglue.js');
20 | 
21 |   bin.stdout.on('data', (data) => {
22 |     process.stdout.write(data.toString());
23 |   });
24 | 
25 |   bin.stderr.on('data', (data) => {
26 |     process.stderr.write(data.toString());
27 |   });
28 | 
29 |   bin.on('close', (code) => {
30 |     console.log(`* Browserglue child process exited with code ${code}`);
31 |   });
32 | 
33 |   return bin;
34 | }
35 | 
36 | let serverProcess;
37 | 
38 | // Whenever compilation finishes, (re)spawn browserglue child process
39 | nodeCompiler.hooks.done.tap('RestartBrowserGlue', (stats) => {
40 |   // return true to emit the output, otherwise false
41 |   // console.log(stats);
42 |   console.log('* Restart Browserglue server');
43 |   if (serverProcess) {
44 |     serverProcess.kill();
45 |   }
46 |   serverProcess = spawnBrowserglueBinary();
47 |   return true;
48 | });
49 | 
50 | /**
51 |  * Browser
52 |  */
53 | const browserCompiler = webpack(browserConfig);
54 | const browserMiddleware = middleware(browserCompiler, {
55 |   publicPath: browserConfig.output.publicPath,
56 | });
57 | 
58 | // Tell express to use the webpack-dev-middleware and use the webpack dev
59 | // configuration file as a base.
60 | app.use(browserMiddleware);
61 | app.use(express.static('dist'));
62 | 
63 | // Serve the files on port 3000.
64 | app.listen(3000, () => {
65 |   console.log('Serving files at dist/ on http://localhost:3000');
66 | });


--------------------------------------------------------------------------------
/src/Channel.ts:
--------------------------------------------------------------------------------
  1 | /* eslint-disable no-underscore-dangle */
  2 | import Client from "./Client";
  3 | import EventEmitter from "events";
  4 | import Debug from "debug";
  5 | import OSC from "osc-js";
  6 | 
  7 | const debug = Debug("browserglue").extend("channel");
  8 | 
  9 | interface ServerChannel {
 10 |   path: string;
 11 |   port?: number;
 12 |   subscribedPorts: number[];
 13 | }
 14 | 
 15 | class Channel {
 16 |   readonly path: string;
 17 | 
 18 |   protected _client: Client;
 19 |   protected _subscribedPorts: number[];
 20 |   protected _port: number;
 21 |   protected _open: boolean;
 22 |   protected _emitter: EventEmitter;
 23 | 
 24 |   constructor(
 25 |     client: Client,
 26 |     path: string,
 27 |     subscribedPorts: number[],
 28 |     port?: number
 29 |   ) {
 30 |     this.path = path;
 31 | 
 32 |     this._client = client;
 33 |     this._subscribedPorts = subscribedPorts;
 34 |     this._port = port;
 35 |     this._open = true;
 36 | 
 37 |     // Update attributes from server state (change event)
 38 |     client.on(`change:${path}`, (state: ServerChannel) => {
 39 |       // eslint-disable-next-line @typescript-eslint/no-shadow
 40 |       const { subscribedPorts, port } = state;
 41 |       debug(
 42 |         "Received change from server. Update channel %s state: %o %o",
 43 |         path,
 44 |         subscribedPorts,
 45 |         port
 46 |       );
 47 |       this._subscribedPorts = subscribedPorts;
 48 |       this._port = port;
 49 |     });
 50 | 
 51 |     // Make sure to close this channel if it was removed on server
 52 |     client.on(`remove-channel:${path}`, () => {
 53 |       this._open = false;
 54 |     });
 55 |   }
 56 | 
 57 |   get port(): number {
 58 |     return this._port;
 59 |   }
 60 | 
 61 |   get subscribedPorts(): number[] {
 62 |     return this._subscribedPorts;
 63 |   }
 64 | 
 65 |   on(event: string, listener: (...args: any[]) => void): Channel {
 66 |     this._client.on(`${event}:${this.path}`, listener);
 67 |     return this;
 68 |   }
 69 | 
 70 |   // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
 71 |   publish(msg: OSC.Message | OSC.Bundle): boolean {
 72 |     if (!this._open) return false;
 73 |     return this._client.publish(this.path, msg);
 74 |   }
 75 | 
 76 |   async bindPort(port: number): Promise<boolean> {
 77 |     if (!this._open) return false;
 78 |     return this._client.bindPort(this.path, port);
 79 |   }
 80 | 
 81 |   async unbindPort(): Promise<boolean> {
 82 |     if (!this._open) return false;
 83 |     return this._client.unbindPort(this.path);
 84 |   }
 85 | 
 86 |   async subscribePort(port: number): Promise<boolean> {
 87 |     if (!this._open) return false;
 88 |     return await this._client.subscribePort(this.path, port);
 89 |   }
 90 | 
 91 |   async unsubscribePort(port: number): Promise<boolean> {
 92 |     if (!this._open) return false;
 93 |     return this._client.unsubscribePort(this.path, port);
 94 |   }
 95 | 
 96 |   async unsubscribeAllPorts(): Promise<boolean> {
 97 |     if (!this._open) return false;
 98 |     return this._client.unsubscribeAllPorts(this.path);
 99 |   }
100 | 
101 |   async remove(): Promise<boolean> {
102 |     if (!this._open) return false;
103 |     await this._client.removeChannel(this.path);
104 |     this._open = false;
105 |     return true;
106 |   }
107 | }
108 | 
109 | export default Channel;
110 | export { Channel, ServerChannel };
111 | 


--------------------------------------------------------------------------------
/dist/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html>
 3 | 
 4 | <head>
 5 |     <meta charset="utf-8">
 6 |     <meta http-equiv="X-UA-Compatible" content="IE=edge">
 7 |     <meta name="viewport" content="width=device-width, initial-scale=1">
 8 |     <title>browserglue example</title>
 9 | </head>
10 | 
11 | <body>
12 |     <h1>browserglue testbed</h1>
13 |     <p>Open the Developer Tools and check the console log. You can use a browserglue client at <code>bg</code>
14 |         (<code>window.bg</code>).</p>
15 |     <p>You can also enable debug logging messages by setting `localStorage.debug` to `browserglue*`, like this</p>
16 |     <code>
17 |         localStorage.debug = 'browserglue*'
18 |     </code>
19 |     <p>You need to refresh the page for this setting to take effect.</p>
20 | </body>
21 | <script src="browserglue.js"></script>
22 | <script type="text/javascript">
23 |     (async () => {
24 |         const { Client, Message } = browserglue;
25 |         window.bg = new Client();
26 | 
27 |         // Subscribe to all server events
28 |         bg.on('connect', (() => console.log("[connect]")));
29 |         bg.on('disconnect', (() => console.log("[disconnect]")));
30 |         bg.on('change', (msg => console.log("[change]", msg)));
31 |         bg.on('add-channel', (msg => console.log("[add-channel]", msg)));
32 |         bg.on('remove-channel', (msg => console.log("[remove-channel]", msg)));
33 |         bg.on('bind-port', (msg => console.log("[bind-port]", msg)));
34 |         bg.on('subscribe-port', (msg => console.log("[subscribe-port]", msg)));
35 |         bg.on('unsubscribe-port', (msg => console.log("[unsubscribe-port]", msg)));
36 | 
37 |         console.log("Remove all channels first");
38 |         await bg.removeAllChannels();
39 | 
40 |         console.log("Add channel /foo binded to udp:4000")
41 |         const channel = await bg.addChannel("/foo", 4000);
42 |         // Handle messages
43 |         channel.on('message', async msg => {
44 |             const text = await blob.text();
45 |             console.log("[/foo]", text);
46 |         });
47 | 
48 |         // Remove channel after 3 seconds
49 |         console.log("Remove channel /foo in 3 seconds...");
50 |         setTimeout(async () => {
51 |             console.log("Remove channel /foo");
52 |             channel.remove();
53 |             console.log("Current channels:", bg.channels);
54 |         }, 3000);
55 | 
56 |         // Add another channel
57 |         console.log("Add channel /bar binded to udp:5000");
58 |         const barChannel = await bg.addChannel("/bar", 5000);
59 |         console.log("Subscribe port 5010 on /bar");
60 |         barChannel.subscribePort(5010);
61 |         console.log("Subscribe port 5011 on /bar");
62 |         barChannel.subscribePort(5011);
63 |         // Handle messages
64 |         barChannel.on('message', msg => {
65 |             console.log("[/bar]", msg.args);
66 |         });
67 | 
68 |         // Remove channel after 3 seconds
69 |         setTimeout(async () => {
70 |             console.log("Unsubscribe port 5010 on channel /bar");
71 |             barChannel.unsubscribePort(5010);
72 |             console.log("/bar Channel instance:", barChannel);
73 |         }, 500);
74 | 
75 |         // List all channels
76 |         console.log("Current channels:", bg.channels);
77 | 
78 |         setInterval(() => {
79 |             const now = new Date();
80 |             // const msg = `this message was sent at ${now.toISOString()}`;
81 |             const msg = new Message("/myaddress/1", 42, now.toISOString());
82 |             if (barChannel.publish(msg)) {
83 |                 console.log("Publish to /bar:", msg.args);
84 |             }
85 |         }, 3000);
86 |     })();
87 | </script>
88 | 
89 | </html>


--------------------------------------------------------------------------------
/src/ReconnectingWebSocket.ts:
--------------------------------------------------------------------------------
  1 | /* eslint-disable no-underscore-dangle */
  2 | import WebSocket from "isomorphic-ws";
  3 | import { EventEmitter } from "events";
  4 | 
  5 | interface Options {
  6 |   autoConnect?: boolean;
  7 |   reconnectTimeoutInterval?: number;
  8 |   binaryType?: "arraybuffer" | "blob";
  9 | }
 10 | 
 11 | class ReconnectingWebSocket {
 12 |   url: string;
 13 |   reconnectTimeoutInterval: number;
 14 |   binaryType?: string;
 15 | 
 16 |   protected _ws: WebSocket;
 17 |   protected _emitter: EventEmitter;
 18 |   protected _started: boolean;
 19 |   protected _connected: boolean;
 20 |   protected _reconnectTimeout: NodeJS.Timeout;
 21 |   protected _isReconnecting: boolean;
 22 | 
 23 |   constructor(url: string, options?: Options) {
 24 |     const {
 25 |       autoConnect,
 26 |       reconnectTimeoutInterval,
 27 |       binaryType,
 28 |     }: Options = Object.assign({}, options, {
 29 |       autoConnect: true,
 30 |       reconnectTimeoutInterval: 5000,
 31 |     });
 32 | 
 33 |     this.url = url;
 34 |     this.reconnectTimeoutInterval = reconnectTimeoutInterval;
 35 |     this.binaryType = binaryType;
 36 | 
 37 |     this._started = false;
 38 |     this._connected = false;
 39 |     this._emitter = new EventEmitter();
 40 | 
 41 |     if (autoConnect) this.connect();
 42 |   }
 43 | 
 44 |   get connected(): boolean {
 45 |     return this._connected;
 46 |   }
 47 | 
 48 |   connect(): ReconnectingWebSocket {
 49 |     if (this.connected) return this;
 50 |     this._started = true;
 51 |     this._connect();
 52 |     return this;
 53 |   }
 54 | 
 55 |   disconnect(): ReconnectingWebSocket {
 56 |     this._started = false;
 57 |     clearTimeout(this._reconnectTimeout);
 58 |     this._ws.close();
 59 |     return this;
 60 |   }
 61 | 
 62 |   on(
 63 |     event: string | symbol,
 64 |     listener: (...args: any[]) => void
 65 |   ): ReconnectingWebSocket {
 66 |     this._emitter.on(event, listener);
 67 |     return this;
 68 |   }
 69 | 
 70 |   // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
 71 |   send(data: any): ReconnectingWebSocket {
 72 |     this._ws.send(data);
 73 |     return this;
 74 |   }
 75 | 
 76 |   protected _connect(): void {
 77 |     if (this._ws) this._ws.close();
 78 | 
 79 |     this._ws = new WebSocket(this.url);
 80 |     const ws = this._ws;
 81 | 
 82 |     if (this.binaryType) {
 83 |       ws.binaryType = this.binaryType;
 84 |     }
 85 | 
 86 |     clearTimeout(this._reconnectTimeout);
 87 | 
 88 |     ws.onopen = (event: WebSocket.OpenEvent) => {
 89 |       if (!this._connected) this._emitter.emit("connect");
 90 |       this._connected = true;
 91 |       this._isReconnecting = false;
 92 |       this._emitter.emit("open", event);
 93 |     };
 94 | 
 95 |     ws.onclose = (event: WebSocket.CloseEvent) => {
 96 |       if (this._connected) this._emitter.emit("disconnect");
 97 |       this._connected = false;
 98 |       this._isReconnecting = false;
 99 |       if (this._started) this._reconnect();
100 |       this._emitter.emit("close", event);
101 |     };
102 | 
103 |     ws.onerror = (event: WebSocket.ErrorEvent) =>
104 |       this._emitter.emit("error", event.error);
105 |     ws.onmessage = (event: WebSocket.MessageEvent) =>
106 |       this._emitter.emit("message", event);
107 |   }
108 | 
109 |   protected _reconnect(): void {
110 |     // If is reconnecting so do nothing
111 |     if (this._isReconnecting || this._connected || !this._started) {
112 |       return;
113 |     }
114 |     // Set timeout
115 |     this._isReconnecting = true;
116 |     clearTimeout(this._reconnectTimeout);
117 |     this._reconnectTimeout = setTimeout(() => {
118 |       // eslint-disable-next-line no-console
119 |       console.debug("[ws] Reconnecting to", this.url);
120 |       this._connect();
121 |     }, this.reconnectTimeoutInterval);
122 |   }
123 | }
124 | 
125 | export default ReconnectingWebSocket;
126 | 


--------------------------------------------------------------------------------
/CODE_OF_CONDUCT.md:
--------------------------------------------------------------------------------
  1 | # Contributor Covenant Code of Conduct
  2 | 
  3 | ## Our Pledge
  4 | 
  5 | We as members, contributors, and leaders pledge to make participation in our
  6 | community a harassment-free experience for everyone, regardless of age, body
  7 | size, visible or invisible disability, ethnicity, sex characteristics, gender
  8 | identity and expression, level of experience, education, socio-economic status,
  9 | nationality, personal appearance, race, religion, or sexual identity
 10 | and orientation.
 11 | 
 12 | We pledge to act and interact in ways that contribute to an open, welcoming,
 13 | diverse, inclusive, and healthy community.
 14 | 
 15 | ## Our Standards
 16 | 
 17 | Examples of behavior that contributes to a positive environment for our
 18 | community include:
 19 | 
 20 | * Demonstrating empathy and kindness toward other people
 21 | * Being respectful of differing opinions, viewpoints, and experiences
 22 | * Giving and gracefully accepting constructive feedback
 23 | * Accepting responsibility and apologizing to those affected by our mistakes,
 24 |   and learning from the experience
 25 | * Focusing on what is best not just for us as individuals, but for the
 26 |   overall community
 27 | 
 28 | Examples of unacceptable behavior include:
 29 | 
 30 | * The use of sexualized language or imagery, and sexual attention or
 31 |   advances of any kind
 32 | * Trolling, insulting or derogatory comments, and personal or political attacks
 33 | * Public or private harassment
 34 | * Publishing others' private information, such as a physical or email
 35 |   address, without their explicit permission
 36 | * Other conduct which could reasonably be considered inappropriate in a
 37 |   professional setting
 38 | 
 39 | ## Enforcement Responsibilities
 40 | 
 41 | Community leaders are responsible for clarifying and enforcing our standards of
 42 | acceptable behavior and will take appropriate and fair corrective action in
 43 | response to any behavior that they deem inappropriate, threatening, offensive,
 44 | or harmful.
 45 | 
 46 | Community leaders have the right and responsibility to remove, edit, or reject
 47 | comments, commits, code, wiki edits, issues, and other contributions that are
 48 | not aligned to this Code of Conduct, and will communicate reasons for moderation
 49 | decisions when appropriate.
 50 | 
 51 | ## Scope
 52 | 
 53 | This Code of Conduct applies within all community spaces, and also applies when
 54 | an individual is officially representing the community in public spaces.
 55 | Examples of representing our community include using an official e-mail address,
 56 | posting via an official social media account, or acting as an appointed
 57 | representative at an online or offline event.
 58 | 
 59 | ## Enforcement
 60 | 
 61 | Instances of abusive, harassing, or otherwise unacceptable behavior may be
 62 | reported to the community leaders responsible for enforcement at
 63 | munshkr@gmail.com.
 64 | All complaints will be reviewed and investigated promptly and fairly.
 65 | 
 66 | All community leaders are obligated to respect the privacy and security of the
 67 | reporter of any incident.
 68 | 
 69 | ## Enforcement Guidelines
 70 | 
 71 | Community leaders will follow these Community Impact Guidelines in determining
 72 | the consequences for any action they deem in violation of this Code of Conduct:
 73 | 
 74 | ### 1. Correction
 75 | 
 76 | **Community Impact**: Use of inappropriate language or other behavior deemed
 77 | unprofessional or unwelcome in the community.
 78 | 
 79 | **Consequence**: A private, written warning from community leaders, providing
 80 | clarity around the nature of the violation and an explanation of why the
 81 | behavior was inappropriate. A public apology may be requested.
 82 | 
 83 | ### 2. Warning
 84 | 
 85 | **Community Impact**: A violation through a single incident or series
 86 | of actions.
 87 | 
 88 | **Consequence**: A warning with consequences for continued behavior. No
 89 | interaction with the people involved, including unsolicited interaction with
 90 | those enforcing the Code of Conduct, for a specified period of time. This
 91 | includes avoiding interactions in community spaces as well as external channels
 92 | like social media. Violating these terms may lead to a temporary or
 93 | permanent ban.
 94 | 
 95 | ### 3. Temporary Ban
 96 | 
 97 | **Community Impact**: A serious violation of community standards, including
 98 | sustained inappropriate behavior.
 99 | 
100 | **Consequence**: A temporary ban from any sort of interaction or public
101 | communication with the community for a specified period of time. No public or
102 | private interaction with the people involved, including unsolicited interaction
103 | with those enforcing the Code of Conduct, is allowed during this period.
104 | Violating these terms may lead to a permanent ban.
105 | 
106 | ### 4. Permanent Ban
107 | 
108 | **Community Impact**: Demonstrating a pattern of violation of community
109 | standards, including sustained inappropriate behavior,  harassment of an
110 | individual, or aggression toward or disparagement of classes of individuals.
111 | 
112 | **Consequence**: A permanent ban from any sort of public interaction within
113 | the community.
114 | 
115 | ## Attribution
116 | 
117 | This Code of Conduct is adapted from the [Contributor Covenant][homepage],
118 | version 2.0, available at
119 | https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
120 | 
121 | Community Impact Guidelines were inspired by [Mozilla's code of conduct
122 | enforcement ladder](https://github.com/mozilla/diversity).
123 | 
124 | [homepage]: https://www.contributor-covenant.org
125 | 
126 | For answers to common questions about this code of conduct, see the FAQ at
127 | https://www.contributor-covenant.org/faq. Translations are available at
128 | https://www.contributor-covenant.org/translations.
129 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # browserglue
  2 | 
  3 | ![status](https://github.com/munshkr/browserglue/actions/workflows/main.yml/badge.svg)
  4 | 
  5 | > Exposes OSC connections to the browser through WebSockets.
  6 | 
  7 | *Work in progress, design and interface may change frequently*
  8 | 
  9 | ## Features
 10 | 
 11 | * Send messages from local OSC applications to different channels.
 12 | * Publish messages to channels and broadcast them to multiple OSC application on your machine.
 13 | * Portable cross-platform executable that acts as the Server.
 14 | * Server can be controlled remotely from clients (Browser or Node.js library).
 15 | 
 16 | ## Example
 17 | 
 18 | ### Send and receive messages (SuperCollider example)
 19 | 
 20 | This example creates a single channel called `/sclang`, and binds it to the port
 21 | 4000. It also subscribes port 57120 to forward all messages published to this
 22 | channel.
 23 | 
 24 | ```javascript
 25 | const { Client, Message } = browserglue;
 26 | const osc = new Client();
 27 | 
 28 | console.log("Add channel /sclang binded to udp:4000")
 29 | osc.addChannel("/sclang", 4000).then(channel => {
 30 |     // Handle messages sent to port 4000
 31 |     channel.on("message", msg => {
 32 |         console.log("Received:", msg.address, msg.args);
 33 |     });
 34 | 
 35 |     // Subscribe to port 57120 (default SuperCollider interpreter port)
 36 |     channel.subscribePort(57120);
 37 | 
 38 |     setInterval(() => {
 39 |         const now = new Date();
 40 |         const msg = new Message("/chat", 42, now.toISOString());
 41 |         channel.publish(msg);
 42 |         console.log("Publish:", msg.address, msg.args);
 43 |     }, 1000);
 44 | });
 45 | ```
 46 | 
 47 | You can try this on SuperCollider, by running the following pieces of code:
 48 | 
 49 | ```smalltalk
 50 | s.boot;
 51 | 
 52 | // Listen messages on port 51720
 53 | (
 54 | OSCdef(\test, { |msg, time, addr, recvPort|
 55 | 	"Received from browser: %".format([time, msg]).postln
 56 | }, '/chat');
 57 | )
 58 | 
 59 | // Send every 2  seconds an OSC message to port 4000
 60 | b = NetAddr("127.0.0.1", 4000);
 61 | (
 62 | r = Routine {
 63 | 	inf.do { |i|
 64 | 		"Sent: /hello there! %".format(i).postln;
 65 | 		b.sendMsg("/hello", "there!", i);
 66 | 		2.wait;
 67 | 	}
 68 | }.play;
 69 | )
 70 | ```
 71 | 
 72 | ### Multiple channels
 73 | 
 74 | ```javascript
 75 | (async () => {
 76 |     const { Client, Message } = browserglue;
 77 |     window.bg = new Client();
 78 | 
 79 |     // Subscribe to all server events
 80 |     bg.on('connect', (() => console.log("[connect]")));
 81 |     bg.on('disconnect', (() => console.log("[disconnect]")));
 82 |     bg.on('change', (msg => console.log("[change]", msg)));
 83 |     bg.on('add-channel', (msg => console.log("[add-channel]", msg)));
 84 |     bg.on('remove-channel', (msg => console.log("[remove-channel]", msg)));
 85 |     bg.on('bind-port', (msg => console.log("[bind-port]", msg)));
 86 |     bg.on('subscribe-port', (msg => console.log("[subscribe-port]", msg)));
 87 |     bg.on('unsubscribe-port', (msg => console.log("[unsubscribe-port]", msg)));
 88 | 
 89 |     console.log("Remove all channels first");
 90 |     await bg.removeAllChannels();
 91 | 
 92 |     console.log("Add channel /foo binded to udp:4000")
 93 |     const channel = await bg.addChannel("/foo", 4000);
 94 | 
 95 |     // Handle messages
 96 |     channel.on('message', msg => {
 97 |         console.log("[/foo]", msg.address, msg.args);
 98 |     });
 99 | 
100 |     // Remove channel after 3 seconds
101 |     console.log("Remove channel /foo in 3 seconds...");
102 |     setTimeout(() => {
103 |         console.log("Remove channel /foo");
104 |         channel.remove();
105 |         console.log("Current channels:", bg.channels);
106 |     }, 3000);
107 | 
108 |     // Add another channel
109 |     console.log("Add channel /bar binded to udp:5000");
110 |     const barChannel = await bg.addChannel("/bar", 5000);
111 |     console.log("Subscribe port 5010 on /bar");
112 |     barChannel.subscribePort(5010);
113 |     console.log("Subscribe port 5011 on /bar");
114 |     barChannel.subscribePort(5011);
115 |     // Handle messages
116 |     barChannel.on('message', msg => {
117 |         console.log("[/bar]", msg.args);
118 |     });
119 | 
120 |     // Remove channel after 3 seconds
121 |     setTimeout(() => {
122 |         console.log("Unsubscribe port 5010 on channel /bar");
123 |         barChannel.unsubscribePort(5010);
124 |         console.log("/bar Channel instance:", barChannel);
125 |     }, 500);
126 | 
127 |     // List all channels
128 |     console.log("Current channels:", bg.channels);
129 | 
130 |     setInterval(() => {
131 |         const now = new Date();
132 |         const msg = new Message("/myaddress/1", 42, now.toISOString());
133 |         if (barChannel.publish(msg)) {
134 |             console.log("Publish to /bar:", msg.address, msg.args);
135 |         }
136 |     }, 3000);
137 | })();
138 | ```
139 | 
140 | ## Development
141 | 
142 | After cloning repository, install dependencies with `yarn` or `yarn install` .
143 | 
144 | You can start a development server by runnig `yarn dev`. It will watch source
145 | files for changes and restart the BrowserGlue binary script automatically.
146 | 
147 | To create production bundles for the browser and Nodejs, run `yarn build` .
148 | This will generate a `dist/browserglue.js` library for browsers, and
149 | `dist/browserglue.node.js` for Nodejs.
150 | 
151 | Run `yarn docs` to build documentation.
152 | 
153 | ## Design
154 | 
155 | ### OSC Apps Supported Use Cases
156 | 
157 | ![Diagram: OSC Apps Use Cases](media/osc-apps.png)
158 | 
159 | ### Internals
160 | 
161 | ![Diagram: Internals](media/internals.png)
162 | 
163 | ## Contributing
164 | 
165 | Bug reports and pull requests are welcome on GitHub at the [issues
166 | page](https://github.com/munshkr/browserglue). This project is intended to be a
167 | safe, welcoming space for collaboration, and contributors are expected to
168 | adhere to the [Contributor Covenant](http://contributor-covenant.org) code of
169 | conduct.
170 | 
171 | ## License
172 | 
173 | This project is licensed under AGPL 3+. Refer to [LICENSE.txt](LICENSE.txt).
174 | 


--------------------------------------------------------------------------------
/.eslintrc.js:
--------------------------------------------------------------------------------
  1 | /* eslint-disable */
  2 | /*
  3 | 👋 Hi! This file was autogenerated by tslint-to-eslint-config.
  4 | https://github.com/typescript-eslint/tslint-to-eslint-config
  5 | 
  6 | It represents the closest reasonable ESLint configuration to this
  7 | project's original TSLint configuration.
  8 | 
  9 | We recommend eventually switching this configuration to extend from
 10 | the recommended rulesets in typescript-eslint. 
 11 | https://github.com/typescript-eslint/tslint-to-eslint-config/blob/master/docs/FAQs.md
 12 | 
 13 | Happy linting! 💖
 14 | */
 15 | module.exports = {
 16 |     "env": {
 17 |         "browser": true,
 18 |         "node": true
 19 |     },
 20 |     "extends": [
 21 |         "plugin:@typescript-eslint/recommended",
 22 |         "plugin:@typescript-eslint/recommended-requiring-type-checking",
 23 |         "plugin:prettier/recommended",
 24 |         "prettier"
 25 |     ],
 26 |     "parser": "@typescript-eslint/parser",
 27 |     "parserOptions": {
 28 |         "project": "tsconfig.json",
 29 |         "sourceType": "module"
 30 |     },
 31 |     "plugins": [
 32 |         "eslint-plugin-jsdoc",
 33 |         "eslint-plugin-prefer-arrow",
 34 |         "@typescript-eslint"
 35 |     ],
 36 |     "rules": {
 37 |         "prettier/prettier": "error",
 38 |         "@typescript-eslint/adjacent-overload-signatures": "error",
 39 |         "@typescript-eslint/array-type": [
 40 |             "error",
 41 |             {
 42 |                 "default": "array"
 43 |             }
 44 |         ],
 45 |         "@typescript-eslint/ban-types": [
 46 |             "error",
 47 |             {
 48 |                 "types": {
 49 |                     "Object": {
 50 |                         "message": "Avoid using the `Object` type. Did you mean `object`?"
 51 |                     },
 52 |                     "Function": {
 53 |                         "message": "Avoid using the `Function` type. Prefer a specific function type, like `() => void`."
 54 |                     },
 55 |                     "Boolean": {
 56 |                         "message": "Avoid using the `Boolean` type. Did you mean `boolean`?"
 57 |                     },
 58 |                     "Number": {
 59 |                         "message": "Avoid using the `Number` type. Did you mean `number`?"
 60 |                     },
 61 |                     "String": {
 62 |                         "message": "Avoid using the `String` type. Did you mean `string`?"
 63 |                     },
 64 |                     "Symbol": {
 65 |                         "message": "Avoid using the `Symbol` type. Did you mean `symbol`?"
 66 |                     }
 67 |                 }
 68 |             }
 69 |         ],
 70 |         "@typescript-eslint/consistent-type-assertions": "error",
 71 |         "@typescript-eslint/dot-notation": "error",
 72 |         "@typescript-eslint/indent": "off",
 73 |         "@typescript-eslint/member-delimiter-style": [
 74 |             "off",
 75 |             {
 76 |                 "multiline": {
 77 |                     "delimiter": "none",
 78 |                     "requireLast": true
 79 |                 },
 80 |                 "singleline": {
 81 |                     "delimiter": "semi",
 82 |                     "requireLast": false
 83 |                 }
 84 |             }
 85 |         ],
 86 |         "@typescript-eslint/naming-convention": "error",
 87 |         "@typescript-eslint/no-empty-function": "error",
 88 |         "@typescript-eslint/no-empty-interface": "error",
 89 |         "@typescript-eslint/no-explicit-any": "off",
 90 |         "@typescript-eslint/no-misused-new": "error",
 91 |         "@typescript-eslint/no-namespace": "error",
 92 |         "@typescript-eslint/no-parameter-properties": "off",
 93 |         "@typescript-eslint/no-shadow": [
 94 |             "error",
 95 |             {
 96 |                 "hoist": "all"
 97 |             }
 98 |         ],
 99 |         "@typescript-eslint/no-unused-expressions": "error",
100 |         "@typescript-eslint/no-use-before-define": "off",
101 |         "@typescript-eslint/no-var-requires": "error",
102 |         "@typescript-eslint/prefer-for-of": "error",
103 |         "@typescript-eslint/prefer-function-type": "error",
104 |         "@typescript-eslint/prefer-namespace-keyword": "error",
105 |         "@typescript-eslint/quotes": "off",
106 |         "@typescript-eslint/semi": [
107 |             "off",
108 |             null
109 |         ],
110 |         "@typescript-eslint/triple-slash-reference": [
111 |             "error",
112 |             {
113 |                 "path": "always",
114 |                 "types": "prefer-import",
115 |                 "lib": "always"
116 |             }
117 |         ],
118 |         "@typescript-eslint/type-annotation-spacing": "off",
119 |         "@typescript-eslint/unified-signatures": "error",
120 |         "arrow-parens": [
121 |             "off",
122 |             "always"
123 |         ],
124 |         "brace-style": [
125 |             "off",
126 |             "off"
127 |         ],
128 |         "comma-dangle": "off",
129 |         "complexity": "off",
130 |         "constructor-super": "error",
131 |         "eol-last": "off",
132 |         "eqeqeq": [
133 |             "error",
134 |             "smart"
135 |         ],
136 |         "guard-for-in": "error",
137 |         "id-blacklist": [
138 |             "error",
139 |             "any",
140 |             "Number",
141 |             "number",
142 |             "String",
143 |             "string",
144 |             "Boolean",
145 |             "boolean",
146 |             "Undefined",
147 |             "undefined"
148 |         ],
149 |         "id-match": "error",
150 |         "jsdoc/check-alignment": "error",
151 |         "jsdoc/check-indentation": "error",
152 |         "jsdoc/newline-after-description": "error",
153 |         "linebreak-style": "off",
154 |         "max-classes-per-file": [
155 |             "error",
156 |             1
157 |         ],
158 |         "max-len": "off",
159 |         "new-parens": "off",
160 |         "newline-per-chained-call": "off",
161 |         "no-bitwise": "error",
162 |         "no-caller": "error",
163 |         "no-cond-assign": "error",
164 |         "no-console": "error",
165 |         "no-debugger": "error",
166 |         "no-empty": "error",
167 |         "no-eval": "error",
168 |         "no-extra-semi": "off",
169 |         "no-fallthrough": "off",
170 |         "no-invalid-this": "off",
171 |         "no-irregular-whitespace": "off",
172 |         "no-multiple-empty-lines": "off",
173 |         "no-new-wrappers": "error",
174 |         "no-throw-literal": "error",
175 |         "no-trailing-spaces": "off",
176 |         "no-undef-init": "error",
177 |         "no-underscore-dangle": "error",
178 |         "no-unsafe-finally": "error",
179 |         "no-unused-labels": "error",
180 |         "no-var": "error",
181 |         "object-shorthand": "error",
182 |         "one-var": [
183 |             "error",
184 |             "never"
185 |         ],
186 |         "prefer-arrow/prefer-arrow-functions": "error",
187 |         "prefer-const": "error",
188 |         "quote-props": "off",
189 |         "radix": "error",
190 |         "react/jsx-curly-spacing": "off",
191 |         "react/jsx-equals-spacing": "off",
192 |         "react/jsx-tag-spacing": [
193 |             "off",
194 |             {
195 |                 "afterOpening": "allow",
196 |                 "closingSlash": "allow"
197 |             }
198 |         ],
199 |         "react/jsx-wrap-multilines": "off",
200 |         "space-before-function-paren": "off",
201 |         "space-in-parens": [
202 |             "off",
203 |             "never"
204 |         ],
205 |         "spaced-comment": [
206 |             "error",
207 |             "always",
208 |             {
209 |                 "markers": [
210 |                     "/"
211 |                 ]
212 |             }
213 |         ],
214 |         "use-isnan": "error",
215 |         "valid-typeof": "off"
216 |     }
217 | };
218 | 


--------------------------------------------------------------------------------
/src/Client.ts:
--------------------------------------------------------------------------------
  1 | /* eslint-disable @typescript-eslint/no-unsafe-assignment */
  2 | /* eslint-disable no-underscore-dangle */
  3 | /* eslint-disable @typescript-eslint/no-unsafe-call */
  4 | /* eslint-disable @typescript-eslint/no-unsafe-member-access */
  5 | /* eslint-disable @typescript-eslint/no-unsafe-return */
  6 | import { JSONRPCClient } from "json-rpc-2.0";
  7 | import { EventEmitter } from "events";
  8 | import WebSocket from "isomorphic-ws";
  9 | import ReconnectingWebSocket from "./ReconnectingWebSocket";
 10 | import Channel, { ServerChannel } from "./Channel";
 11 | import { DEFAULT_PORT } from "./defaults";
 12 | import Debug from "debug";
 13 | import OSC from "osc-js";
 14 | 
 15 | const debug = Debug("browserglue").extend("client");
 16 | 
 17 | type ServerEventWSPayload = {
 18 |   event: string;
 19 |   message: any;
 20 | };
 21 | 
 22 | type AddChannelEventPayload = {
 23 |   path: string;
 24 | };
 25 | 
 26 | type RemoveChannelEventPayload = {
 27 |   path: string;
 28 | };
 29 | 
 30 | const buildRPCClient = (wsUrl: string): JSONRPCClient => {
 31 |   const [scheme, hostnamePort] = wsUrl.split("://");
 32 |   const secure = scheme === "wss";
 33 |   const httpScheme = secure ? "https" : "http";
 34 |   const url = `${httpScheme}://${hostnamePort}/json-rpc`;
 35 | 
 36 |   // JSONRPCClient needs to know how to send a JSON-RPC request.
 37 |   // Tell it by passing a function to its constructor. The function must take a JSON-RPC request and send it.
 38 |   const client = new JSONRPCClient((jsonRPCRequest) =>
 39 |     fetch(url, {
 40 |       method: "POST",
 41 |       headers: {
 42 |         "content-type": "application/json",
 43 |       },
 44 |       body: JSON.stringify(jsonRPCRequest),
 45 |     }).then((response) => {
 46 |       if (response.status === 200) {
 47 |         // Use client.receive when you received a JSON-RPC response.
 48 |         return response
 49 |           .json()
 50 |           .then((jsonRPCResponse) => client.receive(jsonRPCResponse));
 51 |       } else if (jsonRPCRequest.id) {
 52 |         return Promise.reject(new Error(response.statusText));
 53 |       }
 54 |     })
 55 |   );
 56 | 
 57 |   return client;
 58 | };
 59 | 
 60 | class Client {
 61 |   readonly url: string;
 62 | 
 63 |   protected _channels: { [path: string]: Channel };
 64 |   protected _emitter: EventEmitter;
 65 |   protected _rpcClient: JSONRPCClient;
 66 |   protected _ws: ReconnectingWebSocket;
 67 |   protected _channelWss: { [path: string]: ReconnectingWebSocket };
 68 | 
 69 |   constructor(url = `ws://localhost:${DEFAULT_PORT}`) {
 70 |     this.url = url;
 71 | 
 72 |     this._emitter = new EventEmitter();
 73 |     this._channels = {};
 74 |     this._channelWss = {};
 75 | 
 76 |     this._rpcClient = buildRPCClient(url);
 77 |     this._ws = this._createEventsWebSocket();
 78 | 
 79 |     // Subscribe a no-op listener for `error` events, to avoid the unhandled exception behaviour
 80 |     // (see https://nodejs.org/dist/v11.13.0/docs/api/events.html#events_error_events)
 81 |     // eslint-disable-next-line @typescript-eslint/no-empty-function
 82 |     this._emitter.on("error", () => {});
 83 | 
 84 |     void this._checkVersion();
 85 |   }
 86 | 
 87 |   get connected(): boolean {
 88 |     return this._ws.connected;
 89 |   }
 90 | 
 91 |   get channels(): { [path: string]: Channel } {
 92 |     return { ...this._channels };
 93 |   }
 94 | 
 95 |   connect(): Client {
 96 |     if (this.connected) return this;
 97 |     this._ws.connect();
 98 |     Object.values(this._channelWss).forEach((ws) => ws.connect());
 99 |     return this;
100 |   }
101 | 
102 |   disconnect(): Client {
103 |     this._ws.disconnect();
104 |     Object.values(this._channelWss).forEach((ws) => ws.disconnect());
105 |     return this;
106 |   }
107 | 
108 |   async getServerVersion(): Promise<string> {
109 |     return this._call("getVersion");
110 |   }
111 | 
112 |   async addChannel(
113 |     path: string,
114 |     port?: number,
115 |     sendPort?: number
116 |   ): Promise<Channel> {
117 |     const c: ServerChannel = await this._call("addChannel", {
118 |       path,
119 |       port,
120 |       sendPort,
121 |     });
122 |     return this.channels[path] || this._createChannel(c);
123 |   }
124 | 
125 |   async removeChannel(path: string): Promise<void> {
126 |     await this._call("removeChannel", { path });
127 |     this._deleteChannel(path);
128 |   }
129 | 
130 |   removeAllChannels(): PromiseLike<void> {
131 |     return this._call("removeAllChannels");
132 |   }
133 | 
134 |   bindPort(path: string, port: number): PromiseLike<boolean> {
135 |     return this._call("bindPort", { path, port });
136 |   }
137 | 
138 |   unbindPort(path: string): PromiseLike<boolean> {
139 |     return this._call("unbindPort", { path });
140 |   }
141 | 
142 |   subscribePort(path: string, port: number): PromiseLike<boolean> {
143 |     return this._call("subscribePort", { path, port });
144 |   }
145 | 
146 |   unsubscribePort(path: string, port: number): PromiseLike<boolean> {
147 |     return this._call("unsubscribePort", { path, port });
148 |   }
149 | 
150 |   unsubscribeAllPorts(path: string): PromiseLike<boolean> {
151 |     return this._call("unsubscribeAllPorts", { path });
152 |   }
153 | 
154 |   on(type: string, cb: (message: any) => void): Client {
155 |     this._emitter.on(type, cb);
156 |     return this;
157 |   }
158 | 
159 |   // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
160 |   publish(path: string, msg: OSC.Message | OSC.Bundle): boolean {
161 |     const dataWs = this._channelWss[path];
162 |     if (!dataWs || !dataWs.connected) {
163 |       debug(
164 |         "Tried to publish to %s but socket is closed or not connected",
165 |         path
166 |       );
167 |       return false;
168 |     }
169 |     debug("Publish data to %s", path);
170 |     const binary = msg.pack();
171 |     dataWs.send(binary);
172 |     return true;
173 |   }
174 | 
175 |   protected _call(
176 |     cmd: string,
177 |     params?: { [name: string]: any }
178 |   ): PromiseLike<any> {
179 |     // The request() function returns a promise of the result.
180 |     // TODO: Return false if not connected
181 |     debug("Call RPC method '%s' with params %O", cmd, params);
182 |     return this._rpcClient.request(cmd, params);
183 |   }
184 | 
185 |   protected _createEventsWebSocket(): ReconnectingWebSocket {
186 |     const ws = new ReconnectingWebSocket(`${this.url}/events`);
187 | 
188 |     ws.on("message", (ev: WebSocket.MessageEvent) => {
189 |       const payload = JSON.parse(ev.data as string) as ServerEventWSPayload;
190 |       const { event, message } = payload;
191 | 
192 |       // Emit `change:${path}` events so that each Channel instance gets updated
193 |       switch (event) {
194 |         case "change": {
195 |           const channels = message as { [path: string]: ServerChannel };
196 |           // Update existing channels, or create new channels
197 |           Object.entries(channels).forEach(
198 |             ([path, c]: [string, ServerChannel]) => {
199 |               // Make sure Channel instance exists and is stored
200 |               if (!this.channels[path]) this._createChannel(c);
201 |               this._emitter.emit(`change:${path}`, c);
202 |             }
203 |           );
204 |           // Delete removed channels
205 |           const removedChannels = Object.keys(this.channels).filter(
206 |             (path) => !Object.keys(channels).includes(path)
207 |           );
208 |           removedChannels.forEach((path) => this._deleteChannel(path));
209 |           break;
210 |         }
211 |         case "add-channel": {
212 |           const { path } = message as AddChannelEventPayload;
213 |           const c: ServerChannel = { path, port: null, subscribedPorts: [] };
214 |           this._createChannel(c);
215 |           break;
216 |         }
217 |         case "remove-channel": {
218 |           const { path } = message as RemoveChannelEventPayload;
219 |           this._deleteChannel(path);
220 |           break;
221 |         }
222 |       }
223 | 
224 |       // Finally, emit this as a client event
225 |       this._emitter.emit(event, message);
226 |     });
227 | 
228 |     // Delegate `connect`, `disconnect` and `error` events
229 |     ws.on("connect", () => this._emitter.emit("connect"));
230 |     ws.on("disconnect", () => this._emitter.emit("disconnect"));
231 |     ws.on("error", (error: Error) => this._emitter.emit("error", error));
232 | 
233 |     return ws;
234 |   }
235 | 
236 |   protected _createDataWebSocket(path: string): ReconnectingWebSocket {
237 |     const ws = new ReconnectingWebSocket(`${this.url}/data${path}`, {
238 |       binaryType: "arraybuffer",
239 |     });
240 | 
241 |     // eslint-disable-next-line @typescript-eslint/no-misused-promises
242 |     void ws.on("message", (event: WebSocket.MessageEvent) => {
243 |       debug("Received message on %s", path);
244 |       try {
245 |         const msg = new OSC.Message();
246 |         const binary = new DataView(event.data as ArrayBuffer);
247 |         msg.unpack(binary);
248 |         this._emitter.emit("message", { path, msg });
249 |         this._emitter.emit(`message:${path}`, msg);
250 |       } catch (err) {
251 |         // eslint-disable-next-line no-console
252 |         console.error("Failed to parse OSC message:", err);
253 |       }
254 |     });
255 |     // Do nothing on /data errors (we already emit an error event on /events)
256 |     // eslint-disable-next-line @typescript-eslint/no-empty-function
257 |     ws.on("error", () => {});
258 | 
259 |     return ws;
260 |   }
261 | 
262 |   protected _createChannel(attrs: ServerChannel): Channel {
263 |     const { path, subscribedPorts, port } = attrs;
264 |     const channel = new Channel(this, path, subscribedPorts, port);
265 |     if (!this._channelWss[path]) {
266 |       this._channelWss[path] = this._createDataWebSocket(path);
267 |     }
268 |     this._channels[path] = channel;
269 |     return channel;
270 |   }
271 | 
272 |   protected _deleteChannel(path: string): void {
273 |     const dataWs = this._channelWss[path];
274 |     if (dataWs) dataWs.disconnect();
275 |     this._emitter.emit(`remove-channel:${path}`);
276 |     this._emitter.removeAllListeners(`change:${path}`);
277 |     this._emitter.removeAllListeners(`remove-channel:${path}`);
278 |     // TODO: Remove all listeners from `*:${path}`
279 |     // ...is it possible without storing myself all handled events?
280 |     delete this._channelWss[path];
281 |     delete this._channels[path];
282 |   }
283 | 
284 |   protected _checkVersion(): void {
285 |     void this.getServerVersion().then((serverVersion) => {
286 |       if (serverVersion !== __VERSION__) {
287 |         // eslint-disable-next-line @typescript-eslint/no-unused-vars
288 |         const [serverMajor, serverMinor, _serverPatch] = serverVersion.split(
289 |           "."
290 |         );
291 |         // eslint-disable-next-line @typescript-eslint/no-unused-vars
292 |         const [major, minor, _patch] = __VERSION__.split(".");
293 | 
294 |         let text = `Browserglue server version is ${serverVersion}, but the client expects ${__VERSION__}.\n`;
295 |         if (serverMajor !== major) {
296 |           text += `API might have changed completely, so please make sure you are using the same version.\n`;
297 |         } else if (serverMinor !== minor) {
298 |           text += `API should not have changed, but it is still recommended to use the same version.\n`;
299 |         }
300 |         text += `You can download the right one at https://github.com/munshkr/browserglue/releases`;
301 |         // eslint-disable-next-line no-console
302 |         console.warn(text);
303 |       }
304 |     });
305 |   }
306 | }
307 | 
308 | export default Client;
309 | 


--------------------------------------------------------------------------------
/src/Server.ts:
--------------------------------------------------------------------------------
  1 | /* eslint-disable @typescript-eslint/no-unsafe-member-access */
  2 | /* eslint-disable @typescript-eslint/no-unsafe-call */
  3 | /* eslint-disable @typescript-eslint/no-unsafe-assignment */
  4 | /* eslint-disable no-underscore-dangle */
  5 | import WebSocket from "ws";
  6 | import dgram from "dgram";
  7 | import express from "express";
  8 | import bodyParser from "body-parser";
  9 | import cors from "cors";
 10 | import { JSONRPCServer } from "json-rpc-2.0";
 11 | import { EventEmitter } from "events";
 12 | import { DEFAULT_PORT } from "./defaults";
 13 | import Debug from "debug";
 14 | 
 15 | const debug = Debug("browserglue").extend("server");
 16 | 
 17 | interface ServerChannel {
 18 |   path: string;
 19 |   port?: number;
 20 |   subscribedPorts: number[];
 21 | }
 22 | 
 23 | interface ServerOptions {
 24 |   host?: string;
 25 |   port?: number;
 26 | }
 27 | 
 28 | type AddChannelParams = { path: string; port?: number; sendPort?: number };
 29 | type RemoveChannelParams = { path: string };
 30 | type BindPortParams = { path: string; port: number };
 31 | type UnbindPortParams = { path: string };
 32 | type SubscribePortParams = { path: string; port: number };
 33 | type UnsubscribePortParams = { path: string; port: number };
 34 | type UnsubscribeAllPortsParams = { path: string };
 35 | 
 36 | const buildRPCServer = (server: Server) => {
 37 |   // Create JSON-RPC server
 38 |   const rpcServer = new JSONRPCServer();
 39 | 
 40 |   // Define RPC methods
 41 |   rpcServer.addMethod("getVersion", () => {
 42 |     return __VERSION__;
 43 |   });
 44 | 
 45 |   rpcServer.addMethod(
 46 |     "addChannel",
 47 |     ({ path, port, sendPort }: AddChannelParams) => {
 48 |       return server.addChannel(path, port, sendPort);
 49 |     }
 50 |   );
 51 | 
 52 |   rpcServer.addMethod("removeChannel", ({ path }: RemoveChannelParams) => {
 53 |     return server.removeChannel(path);
 54 |   });
 55 | 
 56 |   rpcServer.addMethod("removeAllChannels", () => {
 57 |     server.removeAllChannels();
 58 |   });
 59 | 
 60 |   rpcServer.addMethod("bindPort", ({ path, port }: BindPortParams) => {
 61 |     return server.bindPort(path, port);
 62 |   });
 63 | 
 64 |   rpcServer.addMethod("unbindPort", ({ path }: UnbindPortParams) => {
 65 |     return server.unbindPort(path);
 66 |   });
 67 | 
 68 |   rpcServer.addMethod(
 69 |     "subscribePort",
 70 |     ({ path, port }: SubscribePortParams) => {
 71 |       return server.subscribePort(path, port);
 72 |     }
 73 |   );
 74 | 
 75 |   rpcServer.addMethod(
 76 |     "unsubscribePort",
 77 |     ({ path, port }: UnsubscribePortParams) => {
 78 |       return server.unsubscribePort(path, port);
 79 |     }
 80 |   );
 81 | 
 82 |   rpcServer.addMethod(
 83 |     "unsubscribeAllPorts",
 84 |     ({ path }: UnsubscribeAllPortsParams) => {
 85 |       return server.unsubscribeAllPorts(path);
 86 |     }
 87 |   );
 88 | 
 89 |   return rpcServer;
 90 | };
 91 | 
 92 | const eventsToBroadcast = [
 93 |   "changed",
 94 |   "add-channel",
 95 |   "remove-channel",
 96 |   "bind-port",
 97 |   "unbind-port",
 98 |   "subscribe-port",
 99 |   "unsubscribe-port",
100 | ];
101 | 
102 | class Server {
103 |   readonly host: string;
104 |   readonly port: number;
105 | 
106 |   protected _emitter: EventEmitter;
107 |   protected _wss: WebSocket.Server;
108 |   protected _channels: { [path: string]: ServerChannel };
109 |   protected _sockets: { [path: string]: dgram.Socket };
110 |   protected _wsClients: { [path: string]: Set<WebSocket> };
111 |   protected _wsEventClients: Set<WebSocket>;
112 |   protected _server: string;
113 | 
114 |   constructor(
115 |     { host, port }: ServerOptions = { host: "localhost", port: DEFAULT_PORT }
116 |   ) {
117 |     this.host = host;
118 |     this.port = port;
119 | 
120 |     this._emitter = new EventEmitter();
121 |     this._channels = {};
122 |     this._sockets = {};
123 |     this._wsClients = {};
124 |     this._wsEventClients = new Set();
125 |   }
126 | 
127 |   start(): void {
128 |     // Create WebSockets servers for both RPC interface and data
129 |     const wss = new WebSocket.Server({ noServer: true });
130 |     this._wss = wss;
131 | 
132 |     const wsDebug = debug.extend("ws");
133 | 
134 |     wss.on("connection", (ws, req) => {
135 |       wsDebug("connection: %o", req.url);
136 | 
137 |       // TODO: Check if url is any of the valid paths (/events, /data/*), and throw error otherwise
138 |       if (req.url.startsWith("/data")) {
139 |         const path = req.url.split("/data")[1];
140 |         if (!this._wsClients[path]) {
141 |           this._wsClients[path] = new Set();
142 |         }
143 |         this._wsClients[path].add(ws);
144 | 
145 |         ws.on("message", (data) => {
146 |           wsDebug("%s received: %s", path, data);
147 |           this._broadcast(path, data);
148 |         });
149 |       } else if (req.url.startsWith("/events")) {
150 |         this._wsEventClients.add(ws);
151 | 
152 |         // Send a "change" payload so that client has the latest server state
153 |         debug("Send first 'change' event to have latest state");
154 |         const payload = { event: "change", message: this._channels };
155 |         ws.send(JSON.stringify(payload));
156 |       }
157 | 
158 |       ws.on("error", (err) => {
159 |         wsDebug("client error: %o", err);
160 |       });
161 | 
162 |       ws.on("close", () => {
163 |         wsDebug("client closed");
164 |       });
165 |     });
166 | 
167 |     const app = express();
168 | 
169 |     app.use(bodyParser.json());
170 | 
171 |     // Allow RPC requests from anywhere
172 |     // TODO: Maybe allow CORS only on some trusted hosts specified by the user?
173 |     app.use(cors());
174 | 
175 |     // Create and setup JSON-RPC server
176 |     const rpcServer = buildRPCServer(this);
177 | 
178 |     // Setup HTTP endpoint for JSON-RPC server
179 |     app.post("/json-rpc", (req, res) => {
180 |       const jsonRPCRequest = req.body;
181 |       // server.receive takes a JSON-RPC request and returns a promise of a JSON-RPC response.
182 |       void rpcServer.receive(jsonRPCRequest).then((jsonRPCResponse) => {
183 |         if (jsonRPCResponse) {
184 |           res.json(jsonRPCResponse);
185 |         } else {
186 |           // If response is absent, it was a JSON-RPC notification method.
187 |           // Respond with no content status (204).
188 |           res.sendStatus(204);
189 |         }
190 |       });
191 |     });
192 | 
193 |     // Create HTTP server and start listening
194 |     const server = app.listen(this.port, this.host);
195 |     this._server = server;
196 | 
197 |     // Handle upgrade requests to WebSockets
198 |     server.on("upgrade", (request, socket, head) => {
199 |       wss.handleUpgrade(request, socket, head, (ws) => {
200 |         wss.emit("connection", ws, request);
201 |       });
202 |     });
203 | 
204 |     const debugServer = debug.extend("http");
205 | 
206 |     server.on("listening", () => {
207 |       debugServer("listening");
208 |       this._emitter.emit("listening");
209 |     });
210 | 
211 |     server.on("close", () => {
212 |       debugServer("closed");
213 |       this._emitter.emit("close");
214 |     });
215 | 
216 |     server.on("error", (err) => {
217 |       debugServer("error: %o", err);
218 |       this._emitter.emit("error", err);
219 |     });
220 | 
221 |     // For every event to broadcast, send to all WS clients subscribed to /events
222 |     eventsToBroadcast.forEach((event) => {
223 |       this._emitter.on(event, (message) => {
224 |         this._emitServerEvent(event, message);
225 |         // Also send a "change" event with the Server state (channels object)
226 |         this._emitServerChangeEvent();
227 |       });
228 |     });
229 |   }
230 | 
231 |   on(event: string, cb: (...args: any[]) => void): EventEmitter {
232 |     return this._emitter.on(event, cb);
233 |   }
234 | 
235 |   addChannel(path: string, port?: number, sendPort?: number): ServerChannel {
236 |     // If channel already exists, return it
237 |     if (Object.keys(this._channels).includes(path)) {
238 |       debug("Channel already exists");
239 |       return this._channels[path];
240 |     }
241 | 
242 |     debug(`Add channel ${path}`);
243 |     const newChannel: ServerChannel = {
244 |       path,
245 |       port,
246 |       subscribedPorts: [],
247 |     };
248 |     this._channels[path] = newChannel;
249 |     this._emitter.emit("add-channel", { path });
250 | 
251 |     const socket = dgram.createSocket("udp4");
252 |     this._sockets[path] = socket;
253 | 
254 |     // If port argument is present, bind it
255 |     if (port) {
256 |       this.bindPort(path, port);
257 |     }
258 | 
259 |     // If sendPort is present, subscribe it
260 |     if (sendPort) {
261 |       this.subscribePort(path, sendPort);
262 |     }
263 | 
264 |     return newChannel;
265 |   }
266 | 
267 |   removeChannel(path: string): boolean {
268 |     const socket = this._sockets[path];
269 |     if (socket) {
270 |       debug(`Remove channel %s`, path);
271 |       try {
272 |         socket.close();
273 |       } catch (err) {
274 |         debug("Socket is already closed: %o", err);
275 |       }
276 |     }
277 |     // Clean up
278 |     delete this._channels[path];
279 |     delete this._sockets[path];
280 |     delete this._wsClients[path];
281 |     if (!socket) return false;
282 |     this._emitter.emit("remove-channel", { path });
283 |     return true;
284 |   }
285 | 
286 |   removeAllChannels(): void {
287 |     debug("Remove all channels");
288 |     Object.keys(this._channels).forEach((path) => {
289 |       this.removeChannel(path);
290 |     });
291 |   }
292 | 
293 |   bindPort(path: string, port: number): boolean {
294 |     const channel = this._channels[path];
295 |     if (!channel) return false;
296 | 
297 |     if (channel.port) {
298 |       if (channel.port !== port) {
299 |         debug(
300 |           `Channel %s already has a binded port at %d. ` +
301 |             `Will re-create socket.`,
302 |           path,
303 |           channel.port
304 |         );
305 |       }
306 |       try {
307 |         this._sockets[path].close();
308 |       } catch (err) {
309 |         debug("Socket is already closed: %o", err);
310 |       }
311 |       this._sockets[path] = dgram.createSocket("udp4");
312 |     }
313 | 
314 |     const socket = this._sockets[path];
315 |     const udpDebug = debug.extend("udp");
316 | 
317 |     socket.on("listening", () => {
318 |       const address = socket.address();
319 |       udpDebug(`Socket binded at port %d`, address.port);
320 |     });
321 | 
322 |     socket.on("error", (err) => {
323 |       udpDebug(`socket error:\n%o`, err.stack);
324 |       socket.close();
325 |       // TODO: Reject promise with error?
326 |     });
327 | 
328 |     socket.on("message", (buffer, rinfo) => {
329 |       udpDebug(`socket got: %s from %s:%d`, port, rinfo.address, rinfo.port);
330 | 
331 |       // Broadcast message to all subscribed clients on /data/{path}
332 |       const wsClients = this._wsClients[path] || [];
333 |       wsClients.forEach((client: WebSocket) => {
334 |         if (client.readyState === WebSocket.OPEN) {
335 |           client.send(buffer);
336 |         }
337 |       });
338 |     });
339 | 
340 |     debug(`Bind socket of channel %s to port %d`, path, port);
341 |     socket.bind({ address: "0.0.0.0", port });
342 |     channel.port = port;
343 | 
344 |     this._emitter.emit("bind-port", { path, port });
345 | 
346 |     return true;
347 |   }
348 | 
349 |   unbindPort(path: string): boolean {
350 |     const channel = this._channels[path];
351 |     if (!channel) return false;
352 | 
353 |     debug(`Unbind port of socket channel %s`, path);
354 | 
355 |     // Try to close socket
356 |     const oldSocket = this._sockets[path];
357 |     try {
358 |       oldSocket.close();
359 |     } catch (err) {
360 |       debug("Socket is already closed: %o", err);
361 |     }
362 |     channel.port = null;
363 | 
364 |     // Create new socket
365 |     const socket = dgram.createSocket("udp4");
366 |     this._sockets[path] = socket;
367 | 
368 |     this._emitter.emit("unbind-port", { path });
369 |     return true;
370 |   }
371 | 
372 |   subscribePort(path: string, port: number): boolean {
373 |     if (!this._channels[path]) return false;
374 |     debug(`Subscribe port %d on channel %s`, port, path);
375 |     if (!this._channels[path].subscribedPorts.includes(port)) {
376 |       this._channels[path].subscribedPorts.push(port);
377 |     }
378 |     this._emitter.emit("subscribe-port", { path, port });
379 |     return true;
380 |   }
381 | 
382 |   unsubscribePort(path: string, port: number): boolean {
383 |     if (!this._channels[path]) return false;
384 |     debug(`Unsubscribe port %d from channel %s`, port, path);
385 |     const newPorts = this._channels[path].subscribedPorts.filter(
386 |       (p) => p !== port
387 |     );
388 |     if (newPorts === this._channels[path].subscribedPorts) return false;
389 |     this._channels[path].subscribedPorts = newPorts;
390 |     this._emitter.emit("unsubscribe-port", { path, port });
391 |     return true;
392 |   }
393 | 
394 |   unsubscribeAllPorts(path: string): boolean {
395 |     if (!this._channels[path]) return false;
396 |     debug(`Unsubscribe all ports from channel %s`, path);
397 |     const oldSubscribedPorts = this._channels[path].subscribedPorts;
398 |     this._channels[path].subscribedPorts = [];
399 |     oldSubscribedPorts.forEach((port) => {
400 |       this._emitter.emit("unsubscribe-port", { path, port });
401 |     });
402 |     return true;
403 |   }
404 | 
405 |   // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
406 |   protected _broadcast(path: string, data: any): void {
407 |     const channel = this._channels[path];
408 |     const socket = this._sockets[path];
409 |     if (!socket || !channel) return;
410 | 
411 |     const subscribedPorts = channel.subscribedPorts;
412 |     if (socket && subscribedPorts) {
413 |       subscribedPorts.forEach((port) => {
414 |         socket.send(data, port);
415 |       });
416 |     }
417 |   }
418 | 
419 |   protected _emitServerChangeEvent(): void {
420 |     this._emitServerEvent("change", this._channels);
421 |   }
422 | 
423 |   // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
424 |   protected _emitServerEvent(event: string | symbol, message?: any): void {
425 |     const payload = { event, message };
426 |     this._wsEventClients.forEach((ws) => {
427 |       ws.send(JSON.stringify(payload));
428 |     });
429 |   }
430 | }
431 | 
432 | export default Server;
433 | 


--------------------------------------------------------------------------------
/media/osc-apps.excalidraw:
--------------------------------------------------------------------------------
  1 | {
  2 |   "type": "excalidraw",
  3 |   "version": 2,
  4 |   "source": "https://excalidraw.com",
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 20 |       "strokeColor": "#000000",
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 53 |       "text": "OSC app\nonly sends",
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 55 |       "textAlign": "center",
 56 |       "verticalAlign": "top"
 57 |     },
 58 |     {
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104 |       "fontFamily": 1,
105 |       "text": "OSC app\nonly receives",
106 |       "baseline": 43,
107 |       "textAlign": "center",
108 |       "verticalAlign": "top"
109 |     },
110 |     {
111 |       "type": "rectangle",
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118 |       "strokeStyle": "solid",
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120 |       "opacity": 100,
121 |       "angle": 0,
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123 |       "y": 248,
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133 |     {
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160 |       "verticalAlign": "top"
161 |     },
162 |     {
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213 |       "textAlign": "center",
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216 |     {
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252 |       "y": 367,
253 |       "strokeColor": "#000000",
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267 |       "textAlign": "left",
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--------------------------------------------------------------------------------
/LICENSE.txt:
--------------------------------------------------------------------------------
  1 |                     GNU AFFERO GENERAL PUBLIC LICENSE
  2 |                        Version 3, 19 November 2007
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  4 |  Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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504 | receiving the covered work authorizing them to use, propagate, modify
505 | or convey a specific copy of the covered work, then the patent license
506 | you grant is automatically extended to all recipients of the covered
507 | work and works based on it.
508 | 
509 |   A patent license is "discriminatory" if it does not include within
510 | the scope of its coverage, prohibits the exercise of, or is
511 | conditioned on the non-exercise of one or more of the rights that are
512 | specifically granted under this License.  You may not convey a covered
513 | work if you are a party to an arrangement with a third party that is
514 | in the business of distributing software, under which you make payment
515 | to the third party based on the extent of your activity of conveying
516 | the work, and under which the third party grants, to any of the
517 | parties who would receive the covered work from you, a discriminatory
518 | patent license (a) in connection with copies of the covered work
519 | conveyed by you (or copies made from those copies), or (b) primarily
520 | for and in connection with specific products or compilations that
521 | contain the covered work, unless you entered into that arrangement,
522 | or that patent license was granted, prior to 28 March 2007.
523 | 
524 |   Nothing in this License shall be construed as excluding or limiting
525 | any implied license or other defenses to infringement that may
526 | otherwise be available to you under applicable patent law.
527 | 
528 |   12. No Surrender of Others' Freedom.
529 | 
530 |   If conditions are imposed on you (whether by court order, agreement or
531 | otherwise) that contradict the conditions of this License, they do not
532 | excuse you from the conditions of this License.  If you cannot convey a
533 | covered work so as to satisfy simultaneously your obligations under this
534 | License and any other pertinent obligations, then as a consequence you may
535 | not convey it at all.  For example, if you agree to terms that obligate you
536 | to collect a royalty for further conveying from those to whom you convey
537 | the Program, the only way you could satisfy both those terms and this
538 | License would be to refrain entirely from conveying the Program.
539 | 
540 |   13. Remote Network Interaction; Use with the GNU General Public License.
541 | 
542 |   Notwithstanding any other provision of this License, if you modify the
543 | Program, your modified version must prominently offer all users
544 | interacting with it remotely through a computer network (if your version
545 | supports such interaction) an opportunity to receive the Corresponding
546 | Source of your version by providing access to the Corresponding Source
547 | from a network server at no charge, through some standard or customary
548 | means of facilitating copying of software.  This Corresponding Source
549 | shall include the Corresponding Source for any work covered by version 3
550 | of the GNU General Public License that is incorporated pursuant to the
551 | following paragraph.
552 | 
553 |   Notwithstanding any other provision of this License, you have
554 | permission to link or combine any covered work with a work licensed
555 | under version 3 of the GNU General Public License into a single
556 | combined work, and to convey the resulting work.  The terms of this
557 | License will continue to apply to the part which is the covered work,
558 | but the work with which it is combined will remain governed by version
559 | 3 of the GNU General Public License.
560 | 
561 |   14. Revised Versions of this License.
562 | 
563 |   The Free Software Foundation may publish revised and/or new versions of
564 | the GNU Affero General Public License from time to time.  Such new versions
565 | will be similar in spirit to the present version, but may differ in detail to
566 | address new problems or concerns.
567 | 
568 |   Each version is given a distinguishing version number.  If the
569 | Program specifies that a certain numbered version of the GNU Affero General
570 | Public License "or any later version" applies to it, you have the
571 | option of following the terms and conditions either of that numbered
572 | version or of any later version published by the Free Software
573 | Foundation.  If the Program does not specify a version number of the
574 | GNU Affero General Public License, you may choose any version ever published
575 | by the Free Software Foundation.
576 | 
577 |   If the Program specifies that a proxy can decide which future
578 | versions of the GNU Affero General Public License can be used, that proxy's
579 | public statement of acceptance of a version permanently authorizes you
580 | to choose that version for the Program.
581 | 
582 |   Later license versions may give you additional or different
583 | permissions.  However, no additional obligations are imposed on any
584 | author or copyright holder as a result of your choosing to follow a
585 | later version.
586 | 
587 |   15. Disclaimer of Warranty.
588 | 
589 |   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
590 | APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
594 | PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
595 | IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
597 | 
598 |   16. Limitation of Liability.
599 | 
600 |   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
608 | SUCH DAMAGES.
609 | 
610 |   17. Interpretation of Sections 15 and 16.
611 | 
612 |   If the disclaimer of warranty and limitation of liability provided
613 | above cannot be given local legal effect according to their terms,
614 | reviewing courts shall apply local law that most closely approximates
615 | an absolute waiver of all civil liability in connection with the
616 | Program, unless a warranty or assumption of liability accompanies a
617 | copy of the Program in return for a fee.
618 | 
619 |                      END OF TERMS AND CONDITIONS
620 | 
621 |             How to Apply These Terms to Your New Programs
622 | 
623 |   If you develop a new program, and you want it to be of the greatest
624 | possible use to the public, the best way to achieve this is to make it
625 | free software which everyone can redistribute and change under these terms.
626 | 
627 |   To do so, attach the following notices to the program.  It is safest
628 | to attach them to the start of each source file to most effectively
629 | state the exclusion of warranty; and each file should have at least
630 | the "copyright" line and a pointer to where the full notice is found.
631 | 
632 |     <one line to give the program's name and a brief idea of what it does.>
633 |     Copyright (C) <year>  <name of author>
634 | 
635 |     This program is free software: you can redistribute it and/or modify
636 |     it under the terms of the GNU Affero General Public License as published
637 |     by the Free Software Foundation, either version 3 of the License, or
638 |     (at your option) any later version.
639 | 
640 |     This program is distributed in the hope that it will be useful,
641 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
642 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
643 |     GNU Affero General Public License for more details.
644 | 
645 |     You should have received a copy of the GNU Affero General Public License
646 |     along with this program.  If not, see <https://www.gnu.org/licenses/>.
647 | 
648 | Also add information on how to contact you by electronic and paper mail.
649 | 
650 |   If your software can interact with users remotely through a computer
651 | network, you should also make sure that it provides a way for users to
652 | get its source.  For example, if your program is a web application, its
653 | interface could display a "Source" link that leads users to an archive
654 | of the code.  There are many ways you could offer source, and different
655 | solutions will be better for different programs; see section 13 for the
656 | specific requirements.
657 | 
658 |   You should also get your employer (if you work as a programmer) or school,
659 | if any, to sign a "copyright disclaimer" for the program, if necessary.
660 | For more information on this, and how to apply and follow the GNU AGPL, see
661 | <https://www.gnu.org/licenses/>.
662 | 


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