TypeError:无法读取未定义的属性'client_secret'

我正在尝试关注Google的Node API以在这里访问Gmail。

以quickstart.js node quickstart.js运行示例quickstart时,出现以下错误:

 TypeError: Cannot read property 'client_secret' of undefined at authorize (/home/user/example/quickstart.js:32:43) at processClientSecrets (/home/example/bstick/quickstart.js:21:3) at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:439:3) 
  • 我已经下载了密钥并将其重命名为client_secret.json ,并将其复制到quickstart.js工作目录
  • node --version = 7.8.0 ,package.json有"google-auth-library": "^0.10.0", "googleapis": "^19.0.0"

源代码(Google的例子):

 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/gmail-nodejs-quickstart.json var SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']; var TOKEN_DIR = (process.env.HOME || process.env.HOMEPATH || process.env.USERPROFILE) + '/.credentials/'; var TOKEN_PATH = TOKEN_DIR + 'gmail-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 // Gmail API. authorize(JSON.parse(content), listLabels); }); /** * 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); } /** * Lists the labels in the user's account. * * @param {google.auth.OAuth2} auth An authorized OAuth2 client. */ function listLabels(auth) { var gmail = google.gmail('v1'); gmail.users.labels.list({ auth: auth, userId: 'me', }, function(err, response) { if (err) { console.log('The API returned an error: ' + err); return; } var labels = response.labels; if (labels.length == 0) { console.log('No labels found.'); } else { console.log('Labels:'); for (var i = 0; i < labels.length; i++) { var label = labels[i]; console.log('- %s', label.name); } } }); } 

看起来您必须在生成证书的同时select了除OAuth以外的其他内容。

所以按照你的configuration文件应该看起来像这样的步骤

 {"installed": //whatever 

但是,如果你selectWeb,那么你的configuration文件将如下所示

 {"web":{ //whatever 

所以打开你的configuration文件&基于这个改变这一行。

  var clientSecret = credentials.installed.client_secret; //it should be credentials.whatever-key.client_secret. //Example : If its web then this line should be credentials.web.client_secret.