91 lines
3.1 KiB
JavaScript
91 lines
3.1 KiB
JavaScript
const fs = require('fs');
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const readline = require('readline');
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const {google} = require('googleapis');
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// If modifying these scopes, delete token.json.
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const SCOPES = ['https://www.googleapis.com/auth/drive.metadata.readonly'];
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// The file token.json stores the user's access and refresh tokens, and is
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// created automatically when the authorization flow completes for the first
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// time.
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const TOKEN_PATH = 'token.json';
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// Load client secrets from a local file.
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fs.readFile('credentials.json', (err, content) => {
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if (err) return console.log('Error loading client secret file:', err);
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// Authorize a client with credentials, then call the Google Drive API.
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authorize(JSON.parse(content), listFiles);
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});
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/**
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* Create an OAuth2 client with the given credentials, and then execute the
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* given callback function.
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* @param {Object} credentials The authorization client credentials.
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* @param {function} callback The callback to call with the authorized client.
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*/
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function authorize(credentials, callback) {
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const {client_secret, client_id, redirect_uris} = credentials.installed;
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const oAuth2Client = new google.auth.OAuth2(
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client_id, client_secret, redirect_uris[0]);
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// Check if we have previously stored a token.
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fs.readFile(TOKEN_PATH, (err, token) => {
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if (err) return getAccessToken(oAuth2Client, callback);
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oAuth2Client.setCredentials(JSON.parse(token));
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callback(oAuth2Client);
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});
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}
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/**
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* Get and store new token after prompting for user authorization, and then
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* execute the given callback with the authorized OAuth2 client.
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* @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for.
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* @param {getEventsCallback} callback The callback for the authorized client.
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*/
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function getAccessToken(oAuth2Client, callback) {
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const authUrl = oAuth2Client.generateAuthUrl({
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access_type: 'offline',
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scope: SCOPES,
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});
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console.log('Authorize this app by visiting this url:', authUrl);
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const rl = readline.createInterface({
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input: process.stdin,
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output: process.stdout,
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});
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rl.question('Enter the code from that page here: ', (code) => {
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rl.close();
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oAuth2Client.getToken(code, (err, token) => {
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if (err) return console.error('Error retrieving access token', err);
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oAuth2Client.setCredentials(token);
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// Store the token to disk for later program executions
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fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
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if (err) return console.error(err);
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console.log('Token stored to', TOKEN_PATH);
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});
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callback(oAuth2Client);
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});
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});
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}
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/**
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* Lists the names and IDs of up to 10 files.
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* @param {google.auth.OAuth2} auth An authorized OAuth2 client.
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*/
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function listFiles(auth) {
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const drive = google.drive({version: 'v3', auth});
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drive.files.list({
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pageSize: 10,
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fields: 'nextPageToken, files(id, name)',
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}, (err, res) => {
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if (err) return console.log('The API returned an error: ' + err);
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const files = res.data.files;
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if (files.length) {
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console.log('Files:');
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files.map((file) => {
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console.log(`${file.name} (${file.id})`);
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});
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} else {
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console.log('No files found.');
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}
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});
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}
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