Vue2+Electron+Flask打包后Flask无法启动及进程关闭问题

我刚完成第一个Vue+Electron+Flask项目，但打包时遇到难题。使用npm run electron:serve时一切正常，但执行npm run electron:build后无报错，但Flask完全无法启动。我猜测是打包后dist文件夹中app.py的路径不正确，尝试修改路径但未解决。

background.js代码 #

'use strict'

import { app, protocol, BrowserWindow } from 'electron'
import { createProtocol } from 'vue-cli-plugin-electron-builder/lib'
import installExtension, { VUEJS_DEVTOOLS } from 'electron-devtools-installer'
const isDevelopment = process.env.NODE_ENV !== 'production'

// Scheme must be registered before the app is ready
protocol.registerSchemesAsPrivileged([
  { scheme: 'app', privileges: { secure: true, standard: true } }
])

async function createWindow() {
  // spawn flask app
  var python = require('child_process').spawn('py', ['../server/app.py']);
  python.stdout.on('data', function (data) {
    console.log("data: ", data.toString('utf8'));
  });
  python.stderr.on('data', (data) => {
    console.log(`stderr: ${data}`); // when error
  });
  
  // Create the browser window.
  const win = new BrowserWindow({
    width: 1500,
    height: 1200,
    webPreferences: {
      
      // Use pluginOptions.nodeIntegration, leave this alone
      nodeIntegration: process.env.ELECTRON_NODE_INTEGRATION,
      contextIsolation: !process.env.ELECTRON_NODE_INTEGRATION
    }
  })

  if (process.env.WEBPACK_DEV_SERVER_URL) {
    // Load the url of the dev server if in development mode
    await win.loadURL(process.env.WEBPACK_DEV_SERVER_URL)
    if (!process.env.IS_TEST) win.webContents.openDevTools()
  } else {
    createProtocol('app')
    // Load the index.html when not in development
    win.loadURL('app://./index.html')
  }
}

// Quit when all windows are closed.
app.on('window-all-closed', () => {
  // On macOS 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', () => {
  // 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()
})

// 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', async () => {
  if (isDevelopment && !process.env.IS_TEST) {
    // Install Vue Devtools
    try {
      await installExtension(VUEJS_DEVTOOLS)
    } catch (e) {
      console.error('Vue Devtools failed to install:', e.toString())
    }
  }
  createWindow()
})

// Exit cleanly on request from parent process in development mode.
if (isDevelopment) {
  if (process.platform === 'win32') {
    process.on('message', (data) => {
      if (data === 'graceful-exit') {
        app.quit()
      }
    })
  } else {
    process.on('SIGTERM', () => {
      app.quit()
    })
  }
}

调用app.py的相关代码 #

async function createWindow() {
  // spawn flask app
  var python = require('child_process').spawn('py', ['../server/app.py']);
  python.stdout.on('data', function (data) {
    console.log("data: ", data.toString('utf8'));
  });
  python.stderr.on('data', (data) => {
    console.log(`stderr: ${data}`); // when error
  });
  
  // Create the browser window.
  const win = new BrowserWindow({
    width: 1500,
    height: 1200,
    webPreferences: {
      
      // Use pluginOptions.nodeIntegration, leave this alone
      nodeIntegration: process.env.ELECTRON_NODE_INTEGRATION,
      contextIsolation: !process.env.ELECTRON_NODE_INTEGRATION
    }
  })

文件夹结构 #

• Vue-Electron
  • client
    • dist_electron
    • node_modules
    • public
    • src
      • assets
      • components
      • router
      • views
      • App.vue
      • background.js
      • main.js
      • 其他配置文件
  • server
    • data
    • env
    • app.py
    • requirements.txt
    • 其他被app.py导入的Python脚本
    • sqlite_portofolio.db

我尝试将app.py路径改为['.../server/app.py']，但也无效。

需求 #

由于该程序仅在我个人电脑使用，我不想使用pyInstaller，希望生成一个Electron的.exe文件，双击即可启动Electron并唤起Flask服务。

额外问题 #

另外，我感觉关闭Electron时Flask服务器未被正确终止，请问如何确保Flask进程被正常关闭？

内容的提问来源于stack exchange，提问作者joan colon