Google Drive API上的混淆，如何下载文件夹的内容？ （的node.js）

Question

您好我正在尝试使用google drive api quickstart for node返回给我的数据，并将docx文件的内容直接下载到我的repo。

到目前为止，这是我的代码，几乎直接来自此快速入门页面，https://developers.google.com/drive/v3/web/quickstart/nodejs

var fs = require('fs');
var readline = require('readline');
var google = require('googleapis');
var googleAuth = require('google-auth-library');

// If modifying these scopes, delete your previously saved credentials
// at ~/.credentials/drive-nodejs-quickstart.json
var SCOPES = ['https://www.googleapis.com/auth/drive.metadata.readonly'];
var TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH ||
    process.env.USERPROFILE) + '/.credentials/';
var TOKEN_PATH = TOKEN_DIR + 'drive-nodejs-quickstart.json';

// Load client secrets from a local file.
fs.readFile('client_secret.json', function processClientSecrets(err, content) {
  if (err) {
    console.log('Error loading client secret file: ' + err);
    return;
  }
  // Authorize a client with the loaded credentials, then call the
  // Drive API.
  authorize(JSON.parse(content), listFiles);
});

/**
 * Create an OAuth2 client with the given credentials, and then execute the
 * given callback function.
 *
 * @param {Object} credentials The authorization client credentials.
 * @param {function} callback The callback to call with the authorized client.
 */
function authorize(credentials, callback) {
  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);

  // Check if we have previously stored a token.
  fs.readFile(TOKEN_PATH, function(err, token) {
    if (err) {
      getNewToken(oauth2Client, callback);
    } else {
      oauth2Client.credentials = JSON.parse(token);
      callback(oauth2Client);
    }
  });
}

/**
 * Get and store new token after prompting for user authorization, and then
 * execute the given callback with the authorized OAuth2 client.
 *
 * @param {google.auth.OAuth2} oauth2Client The OAuth2 client to get token for.
 * @param {getEventsCallback} callback The callback to call with the authorized
 *     client.
 */
function getNewToken(oauth2Client, callback) {
  var authUrl = oauth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: SCOPES
  });
  console.log('Authorize this app by visiting this url: ', authUrl);
  var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });
  rl.question('Enter the code from that page here: ', function(code) {
    rl.close();
    oauth2Client.getToken(code, function(err, token) {
      if (err) {
        console.log('Error while trying to retrieve access token', err);
        return;
      }
      oauth2Client.credentials = token;
      storeToken(token);
      callback(oauth2Client);
    });
  });
}

/**
 * Store token to disk be used in later program executions.
 *
 * @param {Object} token The token to store to disk.
 */
function storeToken(token) {
  try {
    fs.mkdirSync(TOKEN_DIR);
  } catch (err) {
    if (err.code != 'EEXIST') {
      throw err;
    }
  }
  fs.writeFile(TOKEN_PATH, JSON.stringify(token));
  console.log('Token stored to ' + TOKEN_PATH);
}
https://www.googleapis.com/drive/v3/files/fileId/text/plain
/**
 * Lists the names and IDs of up to 10 files.
 *
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
function listFiles(auth) {
  var service = google.drive('v3');
  service.files.list({
    auth: auth,
    pageSize: 10,
    fields: "nextPageToken, files(id, name)"
  }, function(err, response) {
    if (err) {
      console.log('The API returned an error: ' + err);
      return;
    }
    var files = response.files;
    if (files.length == 0) {
      console.log('No files found.');
    } else {
      console.log('Files:');
      for (var i = 0; i < files.length; i++) {
        var file = files[i];
        if(file.name.includes('doc')){
   ************  download file somehow ************
        }
      }
    }
  });
}

From reading their documentation(https://developers.google.com/drive/v3/reference/ and https://developers.google.com/drive/v3/reference/files/export#http-request)，看起来我应该将带有id的url导出到我需要的任何mimetype，但即使在浏览器中，这也给了我错误： “没找到”

例如它告诉我使用这个url： https://www.googleapis.com/drive/v3/files/ //出口

给出了id： “1QekrRHbSLu0mDZt64gTMyCOQlWgubufycK1-3249YQY”

https://www.googleapis.com/drive/v3/files/1QekrRHbSLu0mDZt64gTMyCOQlWgubufycK1-3249YQY/text/plain/export

浏览器显示“未找到”

如果我没有/ text / plain / export (https://www.googleapis.com/drive/v3/files/1QekrRHbSLu0mDZt64gTMyCOQlWgubufycK1-3249YQY/)去同一个网址，我会收到错误：

{
 "error": {
  "errors": [
   {
    "domain": "usageLimits",
    "reason": "dailyLimitExceededUnreg",
    "message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup.",
    "extendedHelp": "https://code.google.com/apis/console"
   }
  ],
  "code": 403,
  "message": "Daily Limit for Unauthenticated Use Exceeded. Continued use requires signup."
 }
}

谁能告诉我如何保存我的文件？

Answer 1

这个示例脚本怎么样？

修改要点：

1. 显示Daily Limit for Unauthenticated Use Exceeded...时，可能未经授权使用了Drive API。
2. 在您的脚本中，无法使用var SCOPES = ['https://www.googleapis.com/auth/drive.metadata.readonly'];。
的范围下载文件

修改后的脚本：

要使用此示例，请执行以下操作。

1. 从您的listFiles()替换为我的<。li>
2. 设置folderid。此脚本可以使用folderid检索文件夹中的文件。
3. 删除drive-nodejs-quickstart.json。我认为您的主目录中有.credentials处的文件。
4. 将范围从var SCOPES = ['https://www.googleapis.com/auth/drive.metadata.readonly'];更改为var SCOPES = ['https://www.googleapis.com/auth/drive.readonly'];。
5. 运行脚本，检索代码并进行授权。

此示例假设如下。所以请确认一下。

1. quickstart已使用，默认快速入门正常。如果这不起作用，请再次确认https://developers.google.com/drive/v3/web/quickstart/nodejs。
2. 您的文件ID似乎要下载Google文档。因此，在此脚本中，使用了files.export。
3. 从您的问题来看，您似乎想要从Google文档转换为文本数据。因此，在此脚本中，Google文档将作为文本数据下载。
4. 将忽略垃圾箱中的文件。
5. 文件搜索方法由脚本中的if (e.name.includes('doc')) {执行。

脚本：

function listFiles(auth) {
  var service = google.drive('v3');
  var folderid = "### Folder ID ###";
  service.files.list({
    auth: auth,
    q: "'" + folderid + "' in parents and trashed=false",
    fields: "files(id, name)"
  }, function(err, response) {
    if (err) {
      console.log('The API returned an error: ' + err);
      return;
    }
    response.files.forEach(function(e){
      if (e.name.includes('doc')) {
        var dlfile = fs.createWriteStream(e.name + ".txt");
        service.files.export({
          auth: auth,
          fileId: e.id,
          mimeType: 'text/plain'
        }).on('end', function() {
          console.log("Done.");
        }).on('error', function(err) {
          console.error(err);
          return process.exit();
        }).pipe(dlfile);
      }
    });
  });
}

如果我误解了你的问题，我很抱歉。