100 lines
3.6 KiB
JavaScript
100 lines
3.6 KiB
JavaScript
// Authentication tasks
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// --------------------
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const fs = require('fs');
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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/photoslibrary.readonly.appcreateddata'];
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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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function run(req, res, callback) {
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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) {
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return console.log('Error loading client secret file:', err);
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}
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// Authorize a client with credentials, then call the Google Drive API.
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authorize(JSON.parse(content), req, res, callback);
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});
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}
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// Authentication related
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function auth_redirect(req, res) {
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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) {
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return console.log('Error loading client secret file:', err);
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}
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// Authorize a client with credentials
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const credentials = JSON.parse(content);
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const {client_secret, client_id, redirect_uris} = credentials.web;
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const oAuth2Client = new google.auth.OAuth2(client_id, client_secret, redirect_uris[0]);
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// oAuth2Client.getToken(ur.searchParams.get("code"), (err, token) => {
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oAuth2Client.getToken(req.param("code"), (err, token) => {
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if (err) {
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return console.error('Error retrieving access token', err);
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}
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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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res.redirect(301, '/tiny');
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});
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});
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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, req, res, callback) {
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const {client_secret, client_id, redirect_uris} = credentials.web;
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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, req, res, callback);
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oAuth2Client.setCredentials(JSON.parse(token));
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var apis = google.getSupportedAPIs();
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console.log(apis);
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// TODO: Need to wait until googleapis supports Google Photos.
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// Will revisit this at that point
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var api = google;
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callback(req, res, api);
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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, req, res, callback) {
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const authUrl = oAuth2Client.generateAuthUrl({
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access_type: 'online',
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scope: SCOPES,
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});
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res.redirect(301, authUrl);
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}
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// Exported functions
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module.exports = {
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run: run,
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redirect: auth_redirect
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}
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// vim: ai ts=4 sts=4 et sw=4 ft=javascript
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