liulinboyi/index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
    <title>Hello World!</title>
  </head>
  <body>
    <h1>Hello World!</h1>
    We are using Node.js <span id="node-version"></span>,
    Chromium <span id="chrome-version"></span>,
    and Electron <span id="electron-version"></span>.
    <br />
    <button id="download">Download</button>
    <h4 id="process"></h4>

    <!-- 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 } = require('electron')
const path = require('path')

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    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()
}

// 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(() => {
  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()
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.

## package.json
{
  "name": "video-download",
  "productName": "video-download",
  "description": "My Electron application description",
  "keywords": [],
  "main": "./main.js",
  "version": "1.0.0",
  "author": "81492",
  "scripts": {
    "start": "electron ."
  },
  "dependencies": {},
  "devDependencies": {
    "electron": "20.0.3"
  }
}

## preload.js
// All of the Node.js APIs are available in the preload process.
// It has the same sandbox as a Chrome extension.
window.addEventListener('DOMContentLoaded', () => {
  const replaceText = (selector, text) => {
    const element = document.getElementById(selector)
    if (element) element.innerText = text
  }

  for (const type of ['chrome', 'node', 'electron']) {
    replaceText(`${type}-version`, process.versions[type])
  }
})

## renderer.js
// This file is required by 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. Use `preload.js` to
// selectively enable features needed in the rendering
// process.
const download = document.querySelector('#download')
download.addEventListener('click', () => {
  down('https://mdn.github.io/learning-area/html/multimedia-and-embedding/video-and-audio-content/rabbit320.mp4')
})
const process =  document.querySelector('#process')


function down(url) {
  // 1. 创建一个 new XMLHttpRequest 对象
  let xhr = new XMLHttpRequest();
  xhr.responseType = 'blob'
  // 2. 配置它：从 URL /article/.../load GET-request
  xhr.open('GET', url);
  xhr.setRequestHeader('token', 'haha');

  // 3. 通过网络发送请求
  xhr.send();

  // 4. 当接收到响应后，将调用此函数
  xhr.onload = function () {
    if (xhr.status != 200) { // 分析响应的 HTTP 状态
      alert(`Error ${xhr.status}: ${xhr.statusText}`); // 例如 404: Not Found
    } else { // 显示结果
      // alert(`Done, got ${xhr.response.length} bytes`); // response 是服务器响应
      debugger
      console.log(`Done, got ${xhr.response.size} bytes`, xhr.response)
      const downloadA = document.createElement('a');
      const blob = xhr.response
      const URL = window.URL || window.webkitURL
      const herf = URL.createObjectURL(blob)
      downloadA.href = herf
      downloadA.download = url;
      downloadA.click();
      window.URL.revokeObjectURL(herf)
    }
  };

  xhr.onprogress = function (event) {
    if (event.lengthComputable) {
      // alert(`Received ${event.loaded} of ${event.total} bytes`);
      console.log(`Received ${event.loaded} of ${event.total} bytes`)
      process.innerHTML = ((event.loaded / event.total) * 100) + '%'
    } else {
      console.log(`Received ${event.loaded} bytes`, '没有 Content-Length')
      // alert(`Received ${event.loaded} bytes`); // 没有 Content-Length
    }

  };

  xhr.onerror = function () {
    alert("Request failed");
  };
}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP -->
	<title>Hello World!</title>
	</head>
	<body>
	<h1>Hello World!</h1>
	We are using Node.js <span id="node-version"></span>,
	Chromium <span id="chrome-version"></span>,
	and Electron <span id="electron-version"></span>.
	<br />
	<button id="download">Download</button>
	<h4 id="process"></h4>

	<!-- 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 } = require('electron')
	const path = require('path')

	function createWindow () {
	// Create the browser window.
	const mainWindow = new BrowserWindow({
	width: 800,
	height: 600,
	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()
	}

	// 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(() => {
	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()
	})

	// In this file you can include the rest of your app's specific main process
	// code. You can also put them in separate files and require them here.
	{
	"name": "video-download",
	"productName": "video-download",
	"description": "My Electron application description",
	"keywords": [],
	"main": "./main.js",
	"version": "1.0.0",
	"author": "81492",
	"scripts": {
	"start": "electron ."
	},
	"dependencies": {},
	"devDependencies": {
	"electron": "20.0.3"
	}
	}
	// All of the Node.js APIs are available in the preload process.
	// It has the same sandbox as a Chrome extension.
	window.addEventListener('DOMContentLoaded', () => {
	const replaceText = (selector, text) => {
	const element = document.getElementById(selector)
	if (element) element.innerText = text
	}

	for (const type of ['chrome', 'node', 'electron']) {
	replaceText(`${type}-version`, process.versions[type])
	}
	})
	// This file is required by 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. Use `preload.js` to
	// selectively enable features needed in the rendering
	// process.
	const download = document.querySelector('#download')
	download.addEventListener('click', () => {
	down('https://mdn.github.io/learning-area/html/multimedia-and-embedding/video-and-audio-content/rabbit320.mp4')
	})
	const process = document.querySelector('#process')


	function down(url) {
	// 1. 创建一个 new XMLHttpRequest 对象
	let xhr = new XMLHttpRequest();
	xhr.responseType = 'blob'
	// 2. 配置它：从 URL /article/.../load GET-request
	xhr.open('GET', url);
	xhr.setRequestHeader('token', 'haha');

	// 3. 通过网络发送请求
	xhr.send();

	// 4. 当接收到响应后，将调用此函数
	xhr.onload = function () {
	if (xhr.status != 200) { // 分析响应的 HTTP 状态
	alert(`Error ${xhr.status}: ${xhr.statusText}`); // 例如 404: Not Found
	} else { // 显示结果
	// alert(`Done, got ${xhr.response.length} bytes`); // response 是服务器响应
	debugger
	console.log(`Done, got ${xhr.response.size} bytes`, xhr.response)
	const downloadA = document.createElement('a');
	const blob = xhr.response
	const URL = window.URL \|\| window.webkitURL
	const herf = URL.createObjectURL(blob)
	downloadA.href = herf
	downloadA.download = url;
	downloadA.click();
	window.URL.revokeObjectURL(herf)
	}
	};

	xhr.onprogress = function (event) {
	if (event.lengthComputable) {
	// alert(`Received ${event.loaded} of ${event.total} bytes`);
	console.log(`Received ${event.loaded} of ${event.total} bytes`)
	process.innerHTML = ((event.loaded / event.total) * 100) + '%'
	} else {
	console.log(`Received ${event.loaded} bytes`, '没有 Content-Length')
	// alert(`Received ${event.loaded} bytes`); // 没有 Content-Length
	}

	};

	xhr.onerror = function () {
	alert("Request failed");
	};
	}