Created
December 23, 2022 20:15
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Subframe Request
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<!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="default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; frame-src subframe://*"> | |
<link href="./styles.css" rel="stylesheet"> | |
<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>. | |
<iframe id="subframe" src="subframe://index.html"></iframe> | |
<script src="./renderer.js"></script> | |
</body> | |
</html> |
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// Modules to control application life and create native browser window | |
const {app, BrowserWindow, MessageChannelMain, net, protocol} = 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') | |
} | |
}) | |
const { port1, port2 } = new MessageChannelMain() | |
// Send port along to the preload script | |
mainWindow.webContents.on('did-finish-load', () => { | |
mainWindow.webContents.mainFrame.postMessage('port', null, [port1]) | |
port2.on('message', (event) => { | |
console.log('from sub process', event) | |
const request = net.request(event.data) | |
request.on('response', (response) => { | |
let data = '' | |
response.on('data', (chunk) => { | |
data += chunk | |
}) | |
response.on('end', () => { | |
console.log('done') | |
port2.postMessage({ type: 'response', data }) | |
}) | |
}) | |
request.end() | |
}) | |
port2.start() | |
}) | |
// and load the index.html of the app. | |
mainWindow.loadFile('index.html') | |
} | |
// 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(() => { | |
protocol.registerFileProtocol('subframe', (req, callback) => { | |
if (req.url === 'subframe://index.html') { | |
callback({ path: path.join(__dirname, 'subframe.html') }) | |
} else if (req.url === 'subframe://subrenderer.js') { | |
callback({ path: path.join(__dirname, 'subrenderer.js') }) | |
} else { | |
callback(404) | |
} | |
}) | |
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() | |
}) |
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{ | |
"name": "jazzy-note-excite-ki4eq", | |
"productName": "jazzy-note-excite-ki4eq", | |
"description": "My Electron application description", | |
"keywords": [], | |
"main": "./main.js", | |
"version": "1.0.0", | |
"author": "dsanders", | |
"scripts": { | |
"start": "electron ." | |
}, | |
"dependencies": {}, | |
"devDependencies": { | |
"electron": "22.0.0" | |
} | |
} |
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const { ipcRenderer } = require('electron') | |
// Forward the port along to the iframe | |
ipcRenderer.on('port', e => { | |
const port = e.ports[0] | |
document.getElementById('subframe').contentWindow.postMessage('main-process', '*', [port]) | |
}) | |
/** | |
* 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 | |
*/ | |
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]) | |
} | |
}) |
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const { port1, port2 } = new MessageChannel() | |
port1.addEventListener('message', (event) => { | |
const element = document.createElement('p') | |
element.innerText = event.data | |
document.body.appendChild(element) | |
}) | |
window.addEventListener('load', () => { | |
document.getElementById('subframe').contentWindow.postMessage('parent-frame', '*', [port2]) | |
}) | |
port1.start() |
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iframe { | |
border: none; | |
} |
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<!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="default-src 'self'; script-src 'self' subframe://*; style-src 'self' 'unsafe-inline'"> | |
<title>Hello World!</title> | |
</head> | |
<body> | |
<input type="text" size="30" id="url"></input> | |
<button id="send">Send</button> | |
<script src="subframe://subrenderer.js"></script> | |
</body> | |
</html> |
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const ports = {} | |
window.addEventListener("message", (event) => { | |
// Use the port that was transferred to talk to main process | |
if (event.data === 'main-process') { | |
ports.mainProcess = event.ports[0] | |
document.getElementById('send').onclick = () => { | |
ports.mainProcess.postMessage(document.getElementById('url').value) | |
} | |
ports.mainProcess.onmessage = (event) => { | |
if (event.data.type === 'response') { | |
ports.parentFrame.postMessage(event.data.data) | |
} | |
} | |
} else if (event.data === 'parent-frame') { | |
ports.parentFrame = event.ports[0] | |
} | |
}) |
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