Google Drive API下载NODE.JS示例不起作用

Question

这是我基于Google的代码：“以下是使用我们的Drive API客户端库执行文件下载的示例。” NODE.JS

const fs = require('fs')
const google = require('googleapis')
const googleAuth = require('google-auth-library')

const SCOPES = ['https://www.googleapis.com/auth/drive'] // Full, permissive scope to access all of a user's files, excluding the Application Data folder. Request this scope only when it is strictly necessary.
const TOKEN_DIR = './credentials/'
const TOKEN_PATH = TOKEN_DIR + 'token4joeDlEs6.json'
const CLIENT_SECRET_FILEPATH = 'client_secret.json'

var clientSecretStr = fs.readFileSync(CLIENT_SECRET_FILEPATH).toString('utf-8')
var tokenStr = fs.readFileSync(TOKEN_PATH).toString('utf-8')


var credentials = JSON.parse(clientSecretStr) 

var clientSecret = credentials.installed.client_secret
var clientId = credentials.installed.client_id
var redirectUrl = credentials.installed.redirect_uris[0]
var auth = new googleAuth()
var oauth2Client = new auth.OAuth2(clientId, clientSecret, redirectUrl)

oauth2Client.credentials = JSON.parse(tokenStr)

var drive = google.drive('v3');

// ["Examples"-NODE.JS tab](https://developers.google.com/drive/v3/web/manage-downloads)
var fileId = 'OBFUSCATED' // Safeway (OBFUSCATED)
var dest = fs.createWriteStream('out/safeway.txt')
drive.files.get({
  auth: oauth2Client,
  fileId: fileId,
  //alt: 'media'
})
    .on('end', function () {
      console.log('Done');
    })
    .on('error', function (err) {
      console.log('Error during download', err);
    })
    .pipe(dest);

运行无错误：

$ node joeDlSample.js
Done
$

预期结果

out / safeway.txt包含我的购物清单。 :)

实际结果

out / safeway.txt包含

{
  "access_token" : "OBFUSCATED.OBFUSCATED",
  "expires_in" : 3600,
  "token_type" : "Bearer"
}

第二次更接近示例

我还上传了.jpg图片，但未注释alt: media代码中的alt: media行

预期结果

out / elb.jpg包含elb图片

实际结果

out / elb.jpg包含

{
  "access_token" : "OBFUSCATED.OBFUSCATED",
  "expires_in" : 3600,
  "token_type" : "Bearer"
}

Answer 1

通过结合使用Drive NodeJS快速入门和NodeJS的下载文件示例，我设法使Drive API的下载文件正常工作。

在NodeJS快速入门中，有以下代码行：

authorize(JSON.parse(content), listFiles);

我创建了自己的downloadFile函数来下载文件而不是列出文件，并将上述行修改为

  authorize(JSON.parse(content), downloadFile);

这是NodeJS示例的downloadFile函数部分：

function downloadFile(auth){
  var service = google.drive('v3');
  var fileId = 'FILE_ID_OF_SHOPPINGLIST_TEXT_FILE';
  var dest = fs.createWriteStream('/usr/local/google/home/username/Downloads/shoppinglist.txt');

  service.files.get({
      auth: auth,
      fileId: fileId,
      alt: 'media'
  })
      .on('end', function () {
        console.log('Done');
      })
      .on('error', function (err) {
        console.log('Error during download', err);
      })
      .pipe(dest);
}

我的下载文件夹中的下载文件：

为我工作:)