aiddya/index.html Secret

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
    <meta http-equiv="Content-Security-Policy" content="img-src 'self' data:; default-src 'self'; script-src 'self'">
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Desktop Capture</h1>
    <button type="button" id="both-btn">Get screens and windows</button>
    <button type="button" id="screens-btn">Get screens</button>
    <button type="button" id="windows-btn">Get windows</button>
    <button type="button" id="stop-stream">Stop stream</button>
    <h1>Sources</h1>
    <div id="sources"></div>
    <h1>Preview</h1>
    <video width="640" height="480"></video>
    <!-- You can also require other files to run in this process -->
    <script src="./renderer.js"></script>
  </body>
</html>

## main.js
// Modules to control application life and create native browser window
const { app, BrowserWindow, ipcMain, desktopCapturer } = require('electron')
const path = require('path')

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 1300,
    height: 1000,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js')
    }
  })

  // and load the index.html of the app.
  mainWindow.loadFile('index.html')

  // Open the DevTools.
  // mainWindow.webContents.openDevTools()
}

async function getDesktopSources(source_types) {
  return desktopCapturer.getSources({types: source_types}).then(sources => {
     return sources.map(item => ({
      id: item.id,
      name: item.name,
      image: item.thumbnail.toDataURL()
    }))
  }).catch(error => console.log(error))
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.whenReady().then(() => {
  ipcMain.handle('main:list:all', () => getDesktopSources(['screen', 'window']))
  ipcMain.handle('main:list:windows', () => getDesktopSources(['window']))
  ipcMain.handle('main:list:screens', () => getDesktopSources(['screen']))

  createWindow()

  app.on('activate', function () {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on('window-all-closed', function () {
  if (process.platform !== 'darwin') app.quit()
})

## package.json
{
  "name": "desktop-capture-preview",
  "productName": "desktop-capture-preview",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "athul",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {},
  "devDependencies": {
    "electron": "27.0.0-beta.9"
  }
}

## preload.js
/**
 * The preload script runs before. It has access to web APIs
 * as well as Electron's renderer process modules and some
 * polyfilled Node.js functions.
 *
 * https://www.electronjs.org/docs/latest/tutorial/sandbox
 */
const { contextBridge, ipcRenderer } = require('electron')

contextBridge.exposeInMainWorld('electron', {
  listAll: () => ipcRenderer.invoke('main:list:all'),
  listScreens: () => ipcRenderer.invoke('main:list:screens'),
  listWindows: () => ipcRenderer.invoke('main:list:windows'),
})

## renderer.js
/**
 * This file is loaded via the <script> tag in the index.html file and will
 * be executed in the renderer process for that window. No Node.js APIs are
 * available in this process because `nodeIntegration` is turned off and
 * `contextIsolation` is turned on. Use the contextBridge API in `preload.js`
 * to expose Node.js functionality from the main process.
 */
const both_btn = document.getElementById("both-btn")
both_btn.addEventListener('click', async () => {
  displaySources(await window.electron.listAll())
})

const screens_btn = document.getElementById("screens-btn")
screens_btn.addEventListener('click', async () => {
  displaySources(await window.electron.listScreens())
})

const windows_btn = document.getElementById("windows-btn")
windows_btn.addEventListener('click', async () => {
  displaySources(await window.electron.listWindows())
})

async function displaySources(desktop_sources) {
  const sources_element = document.getElementById("sources")
  sources_element.replaceChildren()

  for (i = 0; i < desktop_sources.length; i++) {
    const source_div = document.createElement("div")
    const source_thumb = document.createElement("img")
    source_thumb.src = desktop_sources[i].image
    source_div.appendChild(source_thumb)

    const source_btn = document.createElement("button")
    const source_id = desktop_sources[i].id
    source_btn.innerHTML = source_id
    source_btn.addEventListener('click', () => startDisplayMedia(source_id))
    source_div.appendChild(source_btn)

    sources_element.appendChild(source_div)
  }
}

async function startDisplayMedia(source_id) {
  try {
    const stream = await navigator.mediaDevices.getUserMedia({
      audio: false,
      video: {
        mandatory: {
          chromeMediaSource: 'desktop',
          chromeMediaSourceId: source_id
        }
      }
    })
    handleStream(stream)
    setupStopStream(stream)

    setTimeout(function(){startDisplayMedia(source_id)}, 10000)
  } catch (e) {
    handleError(e)
  }
}


function setupStopStream(stream) {
  const both_btn = document.getElementById("stop-stream")
  both_btn.addEventListener('click', async () => {
    stream.getTracks().forEach(track => track.stop())
  })
}

function handleStream(stream) {
  const video = document.querySelector("video")
  video.srcObject = stream
  video.onloadedmetadata = (e) => video.play()
}

function handleError(e) {
  console.log(e)
}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
	<meta http-equiv="Content-Security-Policy" content="img-src 'self' data:; default-src 'self'; script-src 'self'">
	<title>Hello World!</title>
	</head>
	<body>
	<h1>Desktop Capture</h1>
	<button type="button" id="both-btn">Get screens and windows</button>
	<button type="button" id="screens-btn">Get screens</button>
	<button type="button" id="windows-btn">Get windows</button>
	<button type="button" id="stop-stream">Stop stream</button>
	<h1>Sources</h1>
	<div id="sources"></div>
	<h1>Preview</h1>
	<video width="640" height="480"></video>
	<!-- You can also require other files to run in this process -->
	<script src="./renderer.js"></script>
	</body>
	</html>
	// Modules to control application life and create native browser window
	const { app, BrowserWindow, ipcMain, desktopCapturer } = require('electron')
	const path = require('path')

	function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 1300,
	height: 1000,
	webPreferences: {
	preload: path.join(__dirname, 'preload.js')
	}
	})

	// and load the index.html of the app.
	mainWindow.loadFile('index.html')

	// Open the DevTools.
	// mainWindow.webContents.openDevTools()
	}

	async function getDesktopSources(source_types) {
	return desktopCapturer.getSources({types: source_types}).then(sources => {
	return sources.map(item => ({
	id: item.id,
	name: item.name,
	image: item.thumbnail.toDataURL()
	}))
	}).catch(error => console.log(error))
	}

	// This method will be called when Electron has finished
	// initialization and is ready to create browser windows.
	// Some APIs can only be used after this event occurs.
	app.whenReady().then(() => {
	ipcMain.handle('main:list:all', () => getDesktopSources(['screen', 'window']))
	ipcMain.handle('main:list:windows', () => getDesktopSources(['window']))
	ipcMain.handle('main:list:screens', () => getDesktopSources(['screen']))

	createWindow()

	app.on('activate', function () {
	// On macOS it's common to re-create a window in the app when the
	// dock icon is clicked and there are no other windows open.
	if (BrowserWindow.getAllWindows().length === 0) createWindow()
	})
	})

	// Quit when all windows are closed, except on macOS. There, it's common
	// for applications and their menu bar to stay active until the user quits
	// explicitly with Cmd + Q.
	app.on('window-all-closed', function () {
	if (process.platform !== 'darwin') app.quit()
	})
	{
	"name": "desktop-capture-preview",
	"productName": "desktop-capture-preview",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "athul",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {},
	"devDependencies": {
	"electron": "27.0.0-beta.9"
	}
	}
	/**
	* The preload script runs before. It has access to web APIs
	* as well as Electron's renderer process modules and some
	* polyfilled Node.js functions.
	*
	* https://www.electronjs.org/docs/latest/tutorial/sandbox
	*/
	const { contextBridge, ipcRenderer } = require('electron')

	contextBridge.exposeInMainWorld('electron', {
	listAll: () => ipcRenderer.invoke('main:list:all'),
	listScreens: () => ipcRenderer.invoke('main:list:screens'),
	listWindows: () => ipcRenderer.invoke('main:list:windows'),
	})
	/**
	* This file is loaded via the <script> tag in the index.html file and will
	* be executed in the renderer process for that window. No Node.js APIs are
	* available in this process because `nodeIntegration` is turned off and
	* `contextIsolation` is turned on. Use the contextBridge API in `preload.js`
	* to expose Node.js functionality from the main process.
	*/
	const both_btn = document.getElementById("both-btn")
	both_btn.addEventListener('click', async () => {
	displaySources(await window.electron.listAll())
	})

	const screens_btn = document.getElementById("screens-btn")
	screens_btn.addEventListener('click', async () => {
	displaySources(await window.electron.listScreens())
	})

	const windows_btn = document.getElementById("windows-btn")
	windows_btn.addEventListener('click', async () => {
	displaySources(await window.electron.listWindows())
	})

	async function displaySources(desktop_sources) {
	const sources_element = document.getElementById("sources")
	sources_element.replaceChildren()

	for (i = 0; i < desktop_sources.length; i++) {
	const source_div = document.createElement("div")
	const source_thumb = document.createElement("img")
	source_thumb.src = desktop_sources[i].image
	source_div.appendChild(source_thumb)

	const source_btn = document.createElement("button")
	const source_id = desktop_sources[i].id
	source_btn.innerHTML = source_id
	source_btn.addEventListener('click', () => startDisplayMedia(source_id))
	source_div.appendChild(source_btn)

	sources_element.appendChild(source_div)
	}
	}

	async function startDisplayMedia(source_id) {
	try {
	const stream = await navigator.mediaDevices.getUserMedia({
	audio: false,
	video: {
	mandatory: {
	chromeMediaSource: 'desktop',
	chromeMediaSourceId: source_id
	}
	}
	})
	handleStream(stream)
	setupStopStream(stream)

	setTimeout(function(){startDisplayMedia(source_id)}, 10000)
	} catch (e) {
	handleError(e)
	}
	}


	function setupStopStream(stream) {
	const both_btn = document.getElementById("stop-stream")
	both_btn.addEventListener('click', async () => {
	stream.getTracks().forEach(track => track.stop())
	})
	}

	function handleStream(stream) {
	const video = document.querySelector("video")
	video.srcObject = stream
	video.onloadedmetadata = (e) => video.play()
	}

	function handleError(e) {
	console.log(e)
	}