ejs-electron 不能与电子锻造一起使用答案

【问题标题】：ejs-electron not working with electron-forgeejs-electron 不能与电子锻造一起使用
【发布时间】：2019-02-20 14:52:42
【问题描述】：

在我的 electron-forge 应用程序中，在 Windows 10 上运行，ejs 模板未呈现，尽管没有可见错误。我可以使用使用

创建的应用程序重现该问题

electron-forge init ejs-test

我正在使用 electron-forge 5.2.2 和 ejs-electron 2.03 这是我的 index.js 文件：

import { app, BrowserWindow } from 'electron'

import * as ejse from 'ejs-electron'

// Handle creating/removing shortcuts on Windows when installing/uninstalling.
if (require('electron-squirrel-startup')) { // eslint-disable-line global-require
  app.quit()
}

// 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

const createWindow = () => {
  // Create the browser window.
  mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
  })

  ejse.data('testdata', 'Generated throuh EJS')
  // and load the index.html of the app.
  mainWindow.loadFile(`${__dirname}/index.ejs`)

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

  // Emitted when the window is closed.
  mainWindow.on('closed', () => {
    // 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', () => {
  // 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', () => {
  // 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()
  }
})

这是我的 index.ejs 文件：

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
    <%= testdata %>
  </body>
</html>

当我运行它时 npm 开始

我没有收到任何错误，但按原样显示，而不是被替换。在加载我的 ejs 文件之前调用 ejse.listening() 返回 true。

相同的代码适用于非伪造电子应用程序。

你能帮忙吗？

做了一些调查，我发现 ejs-electron 中的关键行

protocol.interceptBufferProtocol('file', protocolListener)

返回以下错误：错误：方案已被拦截

【问题讨论】：

标签： electron ejs electron-forge

【解决方案1】：

这与https://github.com/electron-userland/electron-forge/issues/291 的问题相同。鉴于目前缺乏文档，升级到 electron-forge v6 太难了，所以我找到了解决方法。

我需要使用 ejs 的原因是为了基于多语言的消息文件动态生成我的 html 代码。我首先尝试动态生成它并将 loadURL 与 'data:text/html' 协议一起使用。但是，这会产生很多问题，因为 html 与文件路径没有关联，因此任何引用都没有

所以我转而在构建时为每种语言生成一个 html 文件，并在运行时根据语言选择要加载的文件。

所以两个步骤：我在 package.json 中添加了以下内容：

  "scripts": {
    "build" : "node build.js"
  },

build.js 是：

const ejs = require('ejs')
const fs = require('fs')
let langs = ['en', 'fr']
langs.forEach((lang) => {
  let msgdata = JSON.parse(fs.readFileSync(`${__dirname}/src/messages/${lang}.json`, 'utf8'))

  ejs.renderFile(`${__dirname}/src/views/pages/mindmap.ejs`,
    {
      'messages': msgdata,
      'otherlanguage': 'fr',
    },
    {},
    (err, str) => {
      fs.writeFileSync(`${__dirname}/src/mindmap-${lang}.html`, str, 'utf8')
    })
})

因此，npm run build 会生成与语言文件一样多的 html 文件。

然后我的应用程序的 index.js 文件几乎就是样板电子锻造：

const { app, BrowserWindow, ipcMain } = require('electron')
const ejs = require('ejs')
const fs = require('fs')

// Handle creating/removing shortcuts on Windows when installing/uninstalling.
if (require('electron-squirrel-startup')) { // eslint-disable-line global-require
  app.quit()
}

// 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

const createWindow = () => {
  // Create the browser window.
  mainWindow = new BrowserWindow()

  // and load the index.html of the app.
  mainWindow.loadURL(`file://${__dirname}/mindmap-${lang}.html`)

  // Emitted when the window is closed.
  mainWindow.on('closed', () => {
    // 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', () => {
  // 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', () => {
  // 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 import them here.
ipcMain.on('request-messages', (event, arg) => {
  mainWindow.webContents.send('messages', msgdata)
})

【讨论】：

这个问题的骄傲所有者：D
还在答案中发布你是如何做到的（我的意思是代码）