Electron - 使用 showOpenDialog 时抛出不允许加载本地资源 [英] Electron - throws Not allowed to load local resource when using showOpenDialog

问题描述

我只是想使用 showOpenDialog 并加载图像.但是当我选择一个图像应用程序会崩溃.

I just wanted to use showOpenDialog and load an image. But when I select an image app will crash.

main.js:

...
  ipcMain.on('open-file-dialog', function (event) {
    const window = BrowserWindow.getFocusedWindow();

    dialog.showOpenDialog(window, {
      properties: ['openFile']
    }, p => {
      console.log(p)
    });
  })

renderer.js:

renderer.js:

document.querySelector('#select-image').addEventListener('click', function (event) {
    ipcRenderer.send('open-file-dialog')
});

当我选择任何内容时，控制台中会显示此错误:不允许加载本地资源:file:///startElectron 版本是 8.2.5

When I select anything this error shows in console : Not allowed to load local resource: file:///start and the Electron version is 8.2.5

编辑 1:

此警告(或可能是错误)显示在终端 objc[50899]: Class FIFinderSyncExtensionHost 在/System/Library/PrivateFrameworks/FinderKit.framework/Versions/A/FinderKit (0x7fff951e61d0) 和/System/Library/PrivateFrameworks/FileProvider.framework/OverrideBundles/FinderSyncCollaborationFileProviderOverride.bundle/Contents/MacOS/FinderSyncCollaborationFileProviderOverride (0x11298bdc8).将使用两者之一.哪一个是未定义的.

This warning (or may be error) is shown in the terminal objc[50899]: Class FIFinderSyncExtensionHost is implemented in both /System/Library/PrivateFrameworks/FinderKit.framework/Versions/A/FinderKit (0x7fff951e61d0) and /System/Library/PrivateFrameworks/FileProvider.framework/OverrideBundles/FinderSyncCollaborationFileProviderOverride.bundle/Contents/MacOS/FinderSyncCollaborationFileProviderOverride (0x11298bdc8). One of the two will be used. Which one is undefined.

编辑 2:我使用 Electron Fiddle 整理了示例 Gist:here

Edit 2: I put together sample Gist using Electron Fiddle : here

推荐答案

Electron 不允许带有 webSecurity: true 的窗口加载本地文件.

Electron doesn't allow windows with webSecurity: true to load local files.

消除错误的一种方法是简单地将其设置为 false.但这会使您的应用使用起来不太安全:

One way to get rid of the error is to simply set it to false. But this will make your app less safe to use:

new BrowserWindow({
  ...
  webPreferences: {
    webSecurity: false
  }
})

很好的解决方案

相反，您要做的是创建一个自定义协议，然后使用它来加载文件.

Good solution

Instead, what you have to do is to create a custom protocol and then use that for loading files.

import { protocol } from 'electron'

...

app.on('ready', async () => {
  // Name the protocol whatever you want.
  const protocolName = 'your-app-name'

  protocol.registerFileProtocol(protocolName, (request, callback) => {
    const url = request.url.replace(`${protocolName}://`, '')
    try {
      return callback(decodeURIComponent(url))
    }
    catch (error) {
      // Handle the error as needed
      console.error(error)
    }
  })
  ...

注意:我不确定协议名称是否必须是唯一的，我从未测试过它.如果您只是将协议命名为 safe-protocol 并且您的应用的用户有另一个注册了 safe-protocol 的应用 X，那么您的应用在打开时会抛出错误它或它将注册这两个应用程序，但是当用户尝试使用 app.setAsDefaultProtocolClient 函数从 URL 打开他们的应用程序时，这两个应用程序都会打开.不知道在这种情况下会发生什么.

Note: I'm not sure if the protocol name has to be unique, I never tested it. If you just name the protocol as safe-protocol and the user of your app has another app X with registered safe-protocol, your app will either throw an error when they open it or it will register both apps but when the user tries to open their app from a URL, using app.setAsDefaultProtocolClient function, both of those apps will open. Not sure what happens in this case.

ipcMain.on('open-file-dialog', function (event) {
  const window = BrowserWindow.getFocusedWindow();

  dialog.showOpenDialog(window, { properties: ['openFile'] })
    .then(result => {
      // Send the path back to the renderer
      event.sender.send('open-file-dialog-reply', { path: result.filePaths[0] })
    })
    .catch(error => {
       console.log('Could not get file path')
    })
})

渲染进程:

<img id="image-1">

ipcRenderer.on('open-file-dialog-reply', (event, data) => {
  const path = data.path
  loadImage(path)
}

function loadImage (path) {
  const image1 = document.getElementById('image-1')
  image1.src = `safe-file-protocol://${path}`
}

方法二:直接在渲染器中加载路径:

渲染进程:

<img id="image-1" data-path="C:/test.jpg">

function loadImage () {
  const image1 = document.getElementById('image-1')
  const path = image1.dataset.path
  image1.src = `safe-file-protocol://${path}`
}

loadImage()

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