initial commit

backend/.gitignore

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+/target

backend/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "backend"
+version = "0.1.0"

backend/Cargo.toml

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+[package]
+name = "backend"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

backend/src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}

frontend/.eslintignore

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+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+
+# Ignore files for PNPM, NPM and YARN
+pnpm-lock.yaml
+package-lock.json
+yarn.lock

frontend/.eslintrc.cjs

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+module.exports = {
+	root: true,
+	extends: [
+		'eslint:recommended',
+		'plugin:@typescript-eslint/recommended',
+		'plugin:svelte/recommended',
+		'prettier'
+	],
+	parser: '@typescript-eslint/parser',
+	plugins: ['@typescript-eslint'],
+	parserOptions: {
+		sourceType: 'module',
+		ecmaVersion: 2020,
+		extraFileExtensions: ['.svelte']
+	},
+	env: {
+		browser: true,
+		es2017: true,
+		node: true
+	},
+	overrides: [
+		{
+			files: ['*.svelte'],
+			parser: 'svelte-eslint-parser',
+			parserOptions: {
+				parser: '@typescript-eslint/parser'
+			}
+		}
+	]
+};

frontend/.gitignore

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+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+vite.config.js.timestamp-*
+vite.config.ts.timestamp-*

frontend/.npmrc

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+engine-strict=true
+resolution-mode=highest

frontend/.prettierignore

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+.DS_Store
+node_modules
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+
+# Ignore files for PNPM, NPM and YARN
+pnpm-lock.yaml
+package-lock.json
+yarn.lock

frontend/.prettierrc

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+{
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"printWidth": 100,
+	"plugins": ["prettier-plugin-svelte"],
+	"pluginSearchDirs": ["."],
+	"overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
+}

frontend/README.md

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+# create-svelte
+
+Everything you need to build a Svelte project, powered by [`create-svelte`](https://github.com/sveltejs/kit/tree/master/packages/create-svelte).
+
+## Creating a project
+
+If you're seeing this, you've probably already done this step. Congrats!
+
+```bash
+# create a new project in the current directory
+npm create svelte@latest
+
+# create a new project in my-app
+npm create svelte@latest my-app
+```
+
+## Developing
+
+Once you've created a project and installed dependencies with `npm install` (or `pnpm install` or `yarn`), start a development server:
+
+```bash
+npm run dev
+
+# or start the server and open the app in a new browser tab
+npm run dev -- --open
+```
+
+## Building
+
+To create a production version of your app:
+
+```bash
+npm run build
+```
+
+You can preview the production build with `npm run preview`.
+
+> To deploy your app, you may need to install an [adapter](https://kit.svelte.dev/docs/adapters) for your target environment.

frontend/package.json

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+{
+	"name": "frontend",
+	"version": "0.0.1",
+	"private": true,
+	"scripts": {
+		"dev": "vite dev --strictPort --port 5173",
+		"build": "vite build",
+		"preview": "vite preview --strictPort --port 5173",
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+		"lint": "prettier --plugin-search-dir . --check . && eslint .",
+		"format": "prettier --plugin-search-dir . --write ."
+	},
+	"devDependencies": {
+		"@sveltejs/adapter-auto": "^2.0.0",
+		"@sveltejs/adapter-static": "^2.0.2",
+		"@sveltejs/kit": "^1.5.0",
+		"@typescript-eslint/eslint-plugin": "^5.45.0",
+		"@typescript-eslint/parser": "^5.45.0",
+		"eslint": "^8.28.0",
+		"eslint-config-prettier": "^8.5.0",
+		"eslint-plugin-svelte": "^2.26.0",
+		"prettier": "^2.8.0",
+		"prettier-plugin-svelte": "^2.8.1",
+		"svelte": "^3.54.0",
+		"svelte-check": "^3.0.1",
+		"tslib": "^2.4.1",
+		"typescript": "^5.0.0",
+		"vite": "^4.3.0"
+	},
+	"type": "module"
+}

frontend/src/app.d.ts

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+// See https://kit.svelte.dev/docs/types#app
+// for information about these interfaces
+declare global {
+	namespace App {
+		// interface Error {}
+		// interface Locals {}
+		// interface PageData {}
+		// interface Platform {}
+	}
+}
+
+
+export { };

frontend/src/app.html

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+<!DOCTYPE html>
+<html lang="en">
+	<head>
+		<meta charset="utf-8" />
+		<link rel="icon" href="%sveltekit.assets%/favicon.png" />
+		<meta name="viewport" content="width=device-width" />
+		%sveltekit.head%
+	</head>
+	<body data-sveltekit-preload-data="hover">
+		<div style="display: contents">%sveltekit.body%</div>
+	</body>
+</html>

frontend/src/routes/+layout.ts

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+export const prerender = true
+export const ssr = false;

frontend/src/routes/+page.svelte

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+<script lang="ts">
+	import { polyfill_RTCIceCandidate } from './polyfill';
+	import * as media from './media';
+
+	polyfill_RTCIceCandidate();
+
+	let media_devices = media.devices;
+	let available_devices = media.availableDevices;
+
+	let video: HTMLMediaElement;
+	let public_ip: string | null = '';
+
+	$: getUserMediaOptions = {
+		audio: $available_devices.audioinput,
+		video: $available_devices.videoinput
+	};
+
+	media.initialize().then(() => console.log('options:', getUserMediaOptions));
+
+	async function getUserMedia() {
+		const supportedConstraints = navigator.mediaDevices.getSupportedConstraints();
+
+		console.log(supportedConstraints);
+
+		const iceServers = [
+			// Test some TURN server
+			{
+				urls: ['turn:turn.h.glsys.de:3478'],
+				username: 'test',
+				credential: 'test123'
+			}
+			// Test some STUN server
+			// { urls: ['stun:turn.h.glsys.de:3478'] },
+		];
+
+		let pc = new RTCPeerConnection({ iceServers });
+
+		pc.onicecandidate = (e) => {
+			if (!e.candidate) return;
+
+			console.log(e.candidate.candidate);
+
+			// If a srflx candidate was found, notify that the STUN server works!
+			if (e.candidate.type == 'srflx') {
+				console.log('The STUN server is reachable!');
+				console.log(`   Your Public IP Address is: ${e.candidate.address}`);
+
+				public_ip = e.candidate.address;
+			}
+
+			// If a relay candidate was found, notify that the TURN server works!
+			if (e.candidate.type == 'relay') {
+				console.log('The TURN server is reachable !');
+			}
+		};
+
+		pc.onicegatheringstatechange = (e) => {
+			console.log(e);
+		};
+
+		// Log errors:
+		// Remember that in most of the cases, even if its working, you will find a STUN host lookup received error
+		// Chrome tried to look up the IPv6 DNS record for server and got an error in that process. However, it may still be accessible through the IPv4 address
+		pc.onicecandidateerror = (e) => {
+			console.error(e);
+		};
+
+		let offer = await pc.createOffer({
+			offerToReceiveAudio: true
+			// offerToReceiveVideo: true
+		});
+
+		console.log(offer);
+
+		await pc.setLocalDescription(offer);
+
+		return;
+
+		console.log('options:', getUserMediaOptions);
+		let stream = await navigator.mediaDevices.getUserMedia(getUserMediaOptions);
+		let stream2 = await navigator.mediaDevices.getDisplayMedia({ audio: true });
+
+		await media.update();
+
+		console.log(stream);
+
+		video.srcObject = stream;
+		await video.play();
+
+		console.log(stream.getAudioTracks());
+		console.log(stream.getVideoTracks());
+	}
+</script>
+
+<h1>Welcome</h1>
+<p>Your public ip is: {public_ip || 'unknown'}</p>
+<button on:click={getUserMedia}>start</button>
+<video bind:this={video} />
+<p>See also: <a href="/a">a</a></p>
+
+<ul>
+	{#each $media_devices as device}
+		<li>{device.kind} | <code>{device.deviceId}</code> | {device.label}</li>
+	{/each}
+</ul>
+
+<div>{JSON.stringify($available_devices)}</div>

frontend/src/routes/a/+page.svelte

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+<h1>A</h1>

frontend/src/routes/media.ts

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+import { writable, type Writable, derived, type Readable } from 'svelte/store';
+
+export const devices: Writable<MediaDeviceInfo[]> = writable([]);
+
+
+export const availableDevices: Readable<{
+    audioinput: boolean,
+    audiooutput: boolean,
+    videoinput: boolean,
+}> = derived(devices, $devices => {
+    let available: { [key in MediaDeviceKind]: boolean } = {
+        audioinput: false,
+        audiooutput: false,
+        videoinput: false,
+    };
+
+    for (const device of $devices) {
+        if (available.hasOwnProperty(device.kind)) available[device.kind] = true;
+    }
+
+    return available;
+})
+
+
+export async function initialize() {
+    await update();
+
+    addEventListener("devicechange", event => {
+        console.log(event);
+        update();
+    });
+}
+
+export async function update() {
+    devices.set(await navigator.mediaDevices.enumerateDevices());
+}
+

frontend/src/routes/polyfill.ts

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+export function polyfill_RTCIceCandidate() {
+    function get_field(candidate: string, n: number): string | null {
+        return candidate ? candidate.split(' ').slice(n)[0] ?? null : null;
+    }
+
+    function polyfill(prop: string, f: (candidate: string) => any) {
+        if (!RTCIceCandidate.prototype.hasOwnProperty(prop))
+            Object.defineProperty(RTCIceCandidate.prototype, prop, {
+                get: function () {
+                    return f.apply(this, [this.candidate]);
+                }
+            });
+    }
+
+    polyfill('foundation', (candidate) => get_field(candidate, 0)?.split(':', 1)[1] ?? null);
+    polyfill('component', (candidate) => {
+        let id = get_field(candidate, 1);
+        if (id == null) return id;
+        switch (+id) {
+            case 1:
+                return 'rtp';
+            case 2:
+                return 'rtcp';
+            default:
+                return null;
+        }
+    });
+    polyfill('protocol', (candidate) => get_field(candidate, 2)?.toLowerCase() ?? null);
+    polyfill('priority', (candidate) => get_field(candidate, 3));
+    polyfill('address', (candidate) => get_field(candidate, 4));
+    polyfill('port', (candidate) => get_field(candidate, 5));
+    polyfill('type', (candidate) => get_field(candidate, 7));
+    polyfill('relatedAddress', (candidate) =>
+        get_field(candidate, 8) == 'raddr' ? get_field(candidate, 9) : null
+    );
+    polyfill('relatedPort', (candidate) => {
+        let i = get_field(candidate, 8) == 'raddr' ? 10 : 8;
+        return get_field(candidate, i) == 'rport' ? get_field(candidate, i + 1) : null;
+    });
+    polyfill('tcpType', function (this: { protocol: string }, candidate) {
+        return this.protocol === 'tcp' ? get_field(candidate, -1) : null;
+    });
+}

frontend/svelte.config.js

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+// import adapter from '@sveltejs/adapter-auto';
+import adapter from '@sveltejs/adapter-static';
+import { vitePreprocess } from '@sveltejs/kit/vite';
+
+/** @type {import('@sveltejs/kit').Config} */
+const config = {
+	// Consult https://kit.svelte.dev/docs/integrations#preprocessors
+	// for more information about preprocessors
+	preprocess: vitePreprocess(),
+
+	kit: {
+		// adapter-auto only supports some environments, see https://kit.svelte.dev/docs/adapter-auto for a list.
+		// If your environment is not supported or you settled on a specific environment, switch out the adapter.
+		// See https://kit.svelte.dev/docs/adapters for more information about adapters.
+		// adapter: adapter()
+		adapter: adapter({
+			// default options are shown. On some platforms
+			// these options are set automatically — see below
+			pages: 'build',
+			assets: 'build',
+			fallback: null,
+			precompress: false,
+			strict: true
+		}),
+	}
+};
+
+export default config;

frontend/tsconfig.json

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+{
+	"extends": "./.svelte-kit/tsconfig.json",
+	"compilerOptions": {
+		"allowJs": true,
+		"checkJs": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"resolveJsonModule": true,
+		"skipLibCheck": true,
+		"sourceMap": true,
+		"strict": true,
+		"strictNullChecks": true
+	}
+	// Path aliases are handled by https://kit.svelte.dev/docs/configuration#alias
+	//
+	// If you want to overwrite includes/excludes, make sure to copy over the relevant includes/excludes
+	// from the referenced tsconfig.json - TypeScript does not merge them in
+}

frontend/vite.config.ts

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+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	plugins: [sveltekit()]
+});