145 lines
4.3 KiB
JavaScript
145 lines
4.3 KiB
JavaScript
'use strict';
|
|
|
|
const { nodeifyFunction, nodeifyPromise } = require('../lib/nodeify');
|
|
const log = require('../lib/log');
|
|
const config = require('config');
|
|
const {MailerError} = require('../lib/mailers');
|
|
const campaigns = require('../models/campaigns');
|
|
const contextHelpers = require('../lib/context-helpers');
|
|
const {SubscriptionStatus} = require('../../shared/lists');
|
|
|
|
const BounceHandler = require('bounce-handler').BounceHandler;
|
|
const SMTPServer = require('smtp-server').SMTPServer;
|
|
|
|
async function onRcptTo(address, session) {
|
|
const addrSplit = address.split('@');
|
|
|
|
if (addrSplit.length !== 2) {
|
|
throw new MailerError('Unknown user ' + address.address, 510);
|
|
}
|
|
|
|
const [user, host] = addrSplit;
|
|
|
|
const message = await campaigns.getMessageByCid(user);
|
|
|
|
if (!message) {
|
|
throw new MailerError('Unknown user ' + address.address, 510);
|
|
}
|
|
|
|
if (message.verp_hostname !== host) {
|
|
throw new MailerError('Unknown user ' + address.address, 510);
|
|
}
|
|
|
|
session.message = message;
|
|
|
|
log.verbose('VERP', 'Incoming message for Campaign %s, List %s, Subscription %s', cids.campaignId, cids.listId, cids.subscriptionId);
|
|
}
|
|
|
|
function onData(stream, session, callback) {
|
|
let chunks = [];
|
|
let totalLen = 0;
|
|
|
|
stream.on('data', chunk => {
|
|
if (!chunk || !chunk.length || totalLen > 60 * 1024) {
|
|
return;
|
|
}
|
|
chunks.push(chunk);
|
|
totalLen += chunk.length;
|
|
});
|
|
|
|
stream.on('end', () => nodeifyPromise(onStreamEnd(), callback));
|
|
|
|
const onStreamEnd = async () => {
|
|
const body = Buffer.concat(chunks, totalLen).toString();
|
|
|
|
const bh = new BounceHandler();
|
|
let bounceResult;
|
|
|
|
try {
|
|
bounceResult = [].concat(bh.parse_email(body) || []).shift();
|
|
} catch (E) {
|
|
log.error('Bounce', 'Failed parsing bounce message');
|
|
log.error('Bounce', JSON.stringify(body));
|
|
}
|
|
|
|
if (!bounceResult || ['failed', 'transient'].indexOf(bounceResult.action) < 0) {
|
|
return 'Message accepted';
|
|
} else {
|
|
await campaigns.changeStatusByMessage(contextHelpers.getAdminContext(), session.message, SubscriptionStatus.BOUNCED, bounceResult.action === 'failed');
|
|
log.verbose('VERP', 'Marked message %s as unsubscribed', session.message.campaign);
|
|
}
|
|
};
|
|
}
|
|
|
|
// Setup server
|
|
const server = new SMTPServer({
|
|
|
|
// log to console
|
|
logger: false,
|
|
|
|
banner: 'Mailtrain VERP bouncer',
|
|
|
|
disabledCommands: ['AUTH', 'STARTTLS'],
|
|
|
|
onRcptTo: nodeifyFunction(onRcptTo),
|
|
onData: onData
|
|
});
|
|
|
|
module.exports = callback => {
|
|
if (!config.verp.enabled) {
|
|
return setImmediate(callback);
|
|
}
|
|
|
|
let started = false;
|
|
|
|
server.on('error', err => {
|
|
const port = config.verp.port;
|
|
const bind = typeof port === 'string' ? 'Pipe ' + port : 'Port ' + port;
|
|
|
|
switch (err.code) {
|
|
case 'EACCES':
|
|
log.error('VERP', '%s requires elevated privileges', bind);
|
|
break;
|
|
case 'EADDRINUSE':
|
|
log.error('VERP', '%s is already in use', bind);
|
|
break;
|
|
case 'ECONNRESET': // Usually happens when a client does not disconnect cleanly
|
|
case 'EPIPE': // Remote connection was closed before the server attempted to send data
|
|
default:
|
|
log.error('VERP', err);
|
|
}
|
|
|
|
if (!started) {
|
|
started = true;
|
|
return callback(err);
|
|
}
|
|
});
|
|
|
|
let hosts;
|
|
if (typeof config.verp.host === 'string' && config.verp.host) {
|
|
hosts = config.verp.host.trim().split(',').map(host => host.trim()).filter(host => !!host);
|
|
if (hosts.indexOf('*') >= 0 || hosts.indexOf('all') >= 0) {
|
|
hosts = [false];
|
|
}
|
|
} else {
|
|
hosts = [false];
|
|
}
|
|
|
|
let pos = 0;
|
|
const startNextHost = () => {
|
|
if (pos >= hosts.length) {
|
|
started = true;
|
|
return setImmediate(callback);
|
|
}
|
|
let host = hosts[pos++];
|
|
server.listen(config.verp.port, host, () => {
|
|
if (started) {
|
|
return server.close();
|
|
}
|
|
log.info('VERP', 'Server listening on %s:%s', host || '*', config.verp.port);
|
|
setImmediate(startNextHost);
|
|
});
|
|
};
|
|
|
|
startNextHost();
|
|
};
|