How to intercept electron's request and return a customized response?


#1

Suppose the user is able to play an audio on the electron app.

<audio id="audio" src="/resource/demo.mp3"></audio>

But the file /resource/demo.mp3 doesn’t exist. It’s just a URL, I want this request to be intercepted by electron’s rendering process, which would then extract demo.mp3 from a zip file and return it to the user, something like this:

SAMPLE CODE

const filter = "/resource/**"
electron.interceptRequest(filter, (url) => {
  const audio_name = url.split("/")[2]; // demo.mp3
  const audio_contents = extract_audio_contents_from_zip(audio_name);
  return audio_contents;
});

As you can see, it’s just like a controller in a web server, is it possible to do so in electron?


#3

const electron = require(‘electron’);
const session = electron.session;

// Module to control application life.
const app = electron.app
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow

const path = require(‘path’)
const url = require(‘url’)

// Keep a global reference of the window object, if you don’t, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow () {
// Create the browser window.
mainWindow = new BrowserWindow({
width: 1200,
height: 600,
frame: true,
webPreferences: {
devTools: true,
webSecurity: false
}
});

mainWindow.webContents.openDevTools();

// and load the index.html of the app.
mainWindow.loadURL(‘YOUR_WEBSITE_URL’);

// 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
})

// filter to catch all requests to wp-content folder
const wpContentFilter = {
urls: [
‘YOUR_WEBSITE_URL/*’
]
};

mainWindow.webContents.session.webRequest.onBeforeRequest(wpContentFilter, (details, callback) => {
console.log(‘onBeforeRequest details’, details);
const { url } = details;
const localURL = url.replace(‘YOUR_WEBSITE_URL’, ‘YOUR_REDIRECT_SITE’ )
// get local asset instead of one from pizza bottle

callback({
cancel: false,
redirectURL: ( encodeURI(localURL ) )
});
});

mainWindow.webContents.session.webRequest.onErrorOccurred((details) => {
console.log(‘error occurred on request’);
console.log(details);
})
}

// 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.