send-mail/node_modules/nodemailer/lib/smtp-transport/index.js

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2020-03-01 05:01:03 +07:00
'use strict';
const EventEmitter = require('events');
const SMTPConnection = require('../smtp-connection');
const wellKnown = require('../well-known');
const shared = require('../shared');
const XOAuth2 = require('../xoauth2');
const packageData = require('../../package.json');
/**
* Creates a SMTP transport object for Nodemailer
*
* @constructor
* @param {Object} options Connection options
*/
class SMTPTransport extends EventEmitter {
constructor(options) {
super();
options = options || {};
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if (typeof options === 'string') {
options = {
url: options
};
}
let urlData;
let service = options.service;
if (typeof options.getSocket === 'function') {
this.getSocket = options.getSocket;
}
if (options.url) {
urlData = shared.parseConnectionUrl(options.url);
service = service || urlData.service;
}
this.options = shared.assign(
false, // create new object
options, // regular options
urlData, // url options
service && wellKnown(service) // wellknown options
);
this.logger = shared.getLogger(this.options, {
component: this.options.component || 'smtp-transport'
});
// temporary object
let connection = new SMTPConnection(this.options);
this.name = 'SMTP';
this.version = packageData.version + '[client:' + connection.version + ']';
if (this.options.auth) {
this.auth = this.getAuth({});
}
}
/**
* Placeholder function for creating proxy sockets. This method immediatelly returns
* without a socket
*
* @param {Object} options Connection options
* @param {Function} callback Callback function to run with the socket keys
*/
getSocket(options, callback) {
// return immediatelly
return setImmediate(() => callback(null, false));
}
getAuth(authOpts) {
if (!authOpts) {
return this.auth;
}
let hasAuth = false;
let authData = {};
if (this.options.auth && typeof this.options.auth === 'object') {
Object.keys(this.options.auth).forEach(key => {
hasAuth = true;
authData[key] = this.options.auth[key];
});
}
if (authOpts && typeof authOpts === 'object') {
Object.keys(authOpts).forEach(key => {
hasAuth = true;
authData[key] = authOpts[key];
});
}
if (!hasAuth) {
return false;
}
switch ((authData.type || '').toString().toUpperCase()) {
case 'OAUTH2': {
if (!authData.service && !authData.user) {
return false;
}
let oauth2 = new XOAuth2(authData, this.logger);
oauth2.provisionCallback = (this.mailer && this.mailer.get('oauth2_provision_cb')) || oauth2.provisionCallback;
oauth2.on('token', token => this.mailer.emit('token', token));
oauth2.on('error', err => this.emit('error', err));
return {
type: 'OAUTH2',
user: authData.user,
oauth2,
method: 'XOAUTH2'
};
}
default:
return {
type: (authData.type || '').toString().toUpperCase() || 'LOGIN',
user: authData.user,
credentials: {
user: authData.user || '',
pass: authData.pass,
options: authData.options
},
method: (authData.method || '').trim().toUpperCase() || this.options.authMethod || false
};
}
}
/**
* Sends an e-mail using the selected settings
*
* @param {Object} mail Mail object
* @param {Function} callback Callback function
*/
send(mail, callback) {
this.getSocket(this.options, (err, socketOptions) => {
if (err) {
return callback(err);
}
let returned = false;
let options = this.options;
if (socketOptions && socketOptions.connection) {
this.logger.info(
{
tnx: 'proxy',
remoteAddress: socketOptions.connection.remoteAddress,
remotePort: socketOptions.connection.remotePort,
destHost: options.host || '',
destPort: options.port || '',
action: 'connected'
},
'Using proxied socket from %s:%s to %s:%s',
socketOptions.connection.remoteAddress,
socketOptions.connection.remotePort,
options.host || '',
options.port || ''
);
// only copy options if we need to modify it
options = shared.assign(false, options);
Object.keys(socketOptions).forEach(key => {
options[key] = socketOptions[key];
});
}
let connection = new SMTPConnection(options);
connection.once('error', err => {
if (returned) {
return;
}
returned = true;
connection.close();
return callback(err);
});
connection.once('end', () => {
if (returned) {
return;
}
let timer = setTimeout(() => {
if (returned) {
return;
}
returned = true;
// still have not returned, this means we have an unexpected connection close
let err = new Error('Unexpected socket close');
if (connection && connection._socket && connection._socket.upgrading) {
// starttls connection errors
err.code = 'ETLS';
}
callback(err);
}, 1000);
try {
timer.unref();
} catch (E) {
// Ignore. Happens on envs with non-node timer implementation
}
});
let sendMessage = () => {
let envelope = mail.message.getEnvelope();
let messageId = mail.message.messageId();
let recipients = [].concat(envelope.to || []);
if (recipients.length > 3) {
recipients.push('...and ' + recipients.splice(2).length + ' more');
}
if (mail.data.dsn) {
envelope.dsn = mail.data.dsn;
}
this.logger.info(
{
tnx: 'send',
messageId
},
'Sending message %s to <%s>',
messageId,
recipients.join(', ')
);
connection.send(envelope, mail.message.createReadStream(), (err, info) => {
returned = true;
connection.close();
if (err) {
this.logger.error(
{
err,
tnx: 'send'
},
'Send error for %s: %s',
messageId,
err.message
);
return callback(err);
}
info.envelope = {
from: envelope.from,
to: envelope.to
};
info.messageId = messageId;
try {
return callback(null, info);
} catch (E) {
this.logger.error(
{
err: E,
tnx: 'callback'
},
'Callback error for %s: %s',
messageId,
E.message
);
}
});
};
connection.connect(() => {
if (returned) {
return;
}
let auth = this.getAuth(mail.data.auth);
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if (auth && (connection.allowsAuth || options.forceAuth)) {
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connection.login(auth, err => {
if (auth && auth !== this.auth && auth.oauth2) {
auth.oauth2.removeAllListeners();
}
if (returned) {
return;
}
if (err) {
returned = true;
connection.close();
return callback(err);
}
sendMessage();
});
} else {
sendMessage();
}
});
});
}
/**
* Verifies SMTP configuration
*
* @param {Function} callback Callback function
*/
verify(callback) {
let promise;
if (!callback) {
promise = new Promise((resolve, reject) => {
callback = shared.callbackPromise(resolve, reject);
});
}
this.getSocket(this.options, (err, socketOptions) => {
if (err) {
return callback(err);
}
let options = this.options;
if (socketOptions && socketOptions.connection) {
this.logger.info(
{
tnx: 'proxy',
remoteAddress: socketOptions.connection.remoteAddress,
remotePort: socketOptions.connection.remotePort,
destHost: options.host || '',
destPort: options.port || '',
action: 'connected'
},
'Using proxied socket from %s:%s to %s:%s',
socketOptions.connection.remoteAddress,
socketOptions.connection.remotePort,
options.host || '',
options.port || ''
);
options = shared.assign(false, options);
Object.keys(socketOptions).forEach(key => {
options[key] = socketOptions[key];
});
}
let connection = new SMTPConnection(options);
let returned = false;
connection.once('error', err => {
if (returned) {
return;
}
returned = true;
connection.close();
return callback(err);
});
connection.once('end', () => {
if (returned) {
return;
}
returned = true;
return callback(new Error('Connection closed'));
});
let finalize = () => {
if (returned) {
return;
}
returned = true;
connection.quit();
return callback(null, true);
};
connection.connect(() => {
if (returned) {
return;
}
let authData = this.getAuth({});
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if (authData && (connection.allowsAuth || options.forceAuth)) {
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connection.login(authData, err => {
if (returned) {
return;
}
if (err) {
returned = true;
connection.close();
return callback(err);
}
finalize();
});
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} else if (!authData && connection.allowsAuth && options.forceAuth) {
let err = new Error('Authentication info was not provided');
err.code = 'NoAuth';
returned = true;
connection.close();
return callback(err);
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} else {
finalize();
}
});
});
return promise;
}
/**
* Releases resources
*/
close() {
if (this.auth && this.auth.oauth2) {
this.auth.oauth2.removeAllListeners();
}
this.emit('close');
}
}
// expose to the world
module.exports = SMTPTransport;