const fs = require('fs');
const path = require('path');
const readline = require('readline');
const {google} = require('googleapis');
const MailComposer = require('nodemailer/lib/mail-composer');
// If modifying these scopes, delete token.json.
const SCOPES = [
'https://mail.google.com',
'https://www.googleapis.com/auth/gmail.readonly'
];
const TOKEN_PATH = 'token.json';
// Load client secrets from a local file.
fs.readFile('credentials.json', (err, content) => {
if (err) return console.log('Error loading client secret file:', err);
// Authorize a client with credentials, then call the Gmail API.
//authorize(JSON.parse(content), listLabels);
authorize(JSON.parse(content), sendEmail);
});
/**
* 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) {
const {client_secret, client_id, redirect_uris} = credentials.installed;
const oAuth2Client = new google.auth.OAuth2(
client_id, client_secret, redirect_uris[0]);
// Check if we have previously stored a token.
fs.readFile(TOKEN_PATH, (err, token) => {
if (err) return getNewToken(oAuth2Client, callback);
oAuth2Client.setCredentials(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 for the authorized client.
*/
function getNewToken(oAuth2Client, callback) {
const authUrl = oAuth2Client.generateAuthUrl({
access_type: 'offline',
scope: SCOPES,
});
console.log('Authorize this app by visiting this url:', authUrl);
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
});
rl.question('Enter the code from that page here: ', (code) => {
rl.close();
oAuth2Client.getToken(code, (err, token) => {
if (err) return console.error('Error retrieving access token', err);
oAuth2Client.setCredentials(token);
// Store the token to disk for later program executions
fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
if (err) return console.error(err);
console.log('Token stored to', TOKEN_PATH);
});
callback(oAuth2Client);
});
});
}
function sendEmail(auth) {
// ----------nodemailer test----------------------------------------------------
let mail = new MailComposer(
{
to: "[email protected] /cdn-cgi/l/email-protection",
text: "I hope this works",
html: " <strong> I hope this works </strong>",
subject: "Test email gmail-nodemailer-composer",
textEncoding: "base64",
attachments: [
{ // encoded string as an attachment
filename: 'text1.txt',
content: 'aGVsbG8gd29ybGQh',
encoding: 'base64'
},
{ // encoded string as an attachment
filename: 'text2.txt',
content: 'aGVsbG8gd29ybGQh',
encoding: 'base64'
},
]
});
mail.compile().build( (error, msg) => {
if (error) return console.log('Error compiling email ' + error);
const encodedMessage = Buffer.from(msg)
.toString('base64')
.replace(/\+/g, '-')
.replace(/\//g, '_')
.replace(/=+$/, '');
const gmail = google.gmail({version: 'v1', auth});
gmail.users.messages.send({
userId: 'me',
resource: {
raw: encodedMessage,
}
}, (err, result) => {
if (err) return console.log('NODEMAILER - The API returned an error: ' + err);
console.log("NODEMAILER - Sending email reply from server:", result.data);
});
})
// ----------nodemailer test----------------------------------------------------
}
