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Electron Fiddle Gist
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="UTF-8"> | |
<title>Hello World!</title> | |
</head> | |
<body> | |
<pre id="pre"></pre> | |
<script> | |
// You can also require other files to run in this process | |
require('./renderer.js') | |
</script> | |
</body> | |
</html> |
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const {app, BrowserWindow, protocol} = require('electron') | |
const stream = require('stream') | |
const url = require('url') | |
let mainWindow | |
protocol.registerSchemesAsPrivileged([ | |
{ scheme: 'custom', privileges: { standard: true, secure: true, supportFetchAPI: true } } | |
]) | |
function getStream (chunkSize, data) { | |
const body = new stream.PassThrough() | |
async function sendChunks () { | |
let buf = Buffer.from(data) | |
for (;;) { | |
body.push(buf.slice(0, chunkSize)) | |
buf = buf.slice(chunkSize) | |
if (!buf.length) { | |
break | |
} | |
} | |
body.push(null) | |
} | |
sendChunks() | |
return body | |
} | |
function createWindow () { | |
protocol.registerStreamProtocol("custom", (request, cb) => { | |
const u = new url.URL(request.url) | |
cb({ | |
statusCode: 200, | |
headers: { 'Content-Type': 'text/plain' }, | |
data: getStream(parseInt(u.searchParams.get('chunkSize')), Buffer.alloc(1024*1024*16)) | |
}) | |
}) | |
// Create the browser window. | |
mainWindow = new BrowserWindow({ | |
width: 800, | |
height: 600, | |
webPreferences: { | |
nodeIntegration: true | |
} | |
}) | |
// and load the index.html of the app. | |
mainWindow.loadFile('index.html') | |
// Open the DevTools. | |
// mainWindow.webContents.openDevTools() | |
// Emitted when the window is closed. | |
mainWindow.on('closed', function () { | |
// Dereference the window object, usually you would store windows | |
// in an array if your app supports multi windows, this is the time | |
// when you should delete the corresponding element. | |
mainWindow = null | |
}) | |
} | |
// 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.on('ready', createWindow) | |
// Quit when all windows are closed. | |
app.on('window-all-closed', function () { | |
// On OS X it is common for applications and their menu bar | |
// to stay active until the user quits explicitly with Cmd + Q | |
if (process.platform !== 'darwin') { | |
app.quit() | |
} | |
}) | |
app.on('activate', function () { | |
// On OS X 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 (mainWindow === null) { | |
createWindow() | |
} | |
}) | |
// 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. |
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// This file is required by the index.html file and will | |
// be executed in the renderer process for that window. | |
// All of the Node.js APIs are available in this process. | |
; | |
(async function() { | |
for (let chunkSize = 16; chunkSize <= 1024*1024; chunkSize *= 2) { | |
const r = await fetch(`custom://u?chunkSize=${chunkSize}`) | |
const t = await r.text() | |
pre.textContent += `\n${t.length} @ chunkSize=${chunkSize}` | |
} | |
})() |
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