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ElectronでExpressアプリケーションを動かす

Frontend

ちょいメモ。こんな感じでいけるっぽい。
元のソースコードは electron-quick-start を使った。

'use strict';

const electron = require('electron');
// Module to control application life.
const app = electron.app;
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow;

const express = require('express');
const webApp = express();

webApp.get('/', function(req, res, next) {
  res.sendFile(__dirname + '/index.html');
});

const port = 3000;
webApp.listen(port, function() {
  console.log('App server started : http://localhost:' + port);
});

// 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: 800, height: 600});

  // and load the index.html of the app.
  mainWindow.loadURL('http://127.0.0.1:' + port);

  // 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.
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();
  }
});

diff を取ると

 ...
 // Module to create native browser window.
 const BrowserWindow = electron.BrowserWindow;

+const express = require('express');
+const webApp = express();
+
+webApp.get('/', function(req, res, next) {
+  res.sendFile(__dirname + '/index.html');
+});
+
+const port = 3000;
+webApp.listen(port, function() {
+  console.log('App server started : http://localhost:' + port);
+});

 // Keep a global reference of the window object, if you don't, the window will

 ...

 function createWindow() {
   mainWindow = new BrowserWindow({width: 800, height: 600});

   // and load the index.html of the app.
-  mainWindow.loadURL('file://' + __dirname + '/index.html');
+  mainWindow.loadURL('http://127.0.0.1:' + port);

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

同じことをやっている人がいたので参考にしたい。