136 lines
4 KiB
JavaScript
136 lines
4 KiB
JavaScript
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'use strict';
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const packageData = require('../../package.json');
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const shared = require('../shared');
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/**
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* Generates a Transport object for streaming
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*
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* Possible options can be the following:
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*
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* * **buffer** if true, then returns the message as a Buffer object instead of a stream
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* * **newline** either 'windows' or 'unix'
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*
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* @constructor
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* @param {Object} optional config parameter
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*/
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class StreamTransport {
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constructor(options) {
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options = options || {};
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this.options = options || {};
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this.name = 'StreamTransport';
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this.version = packageData.version;
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this.logger = shared.getLogger(this.options, {
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component: this.options.component || 'stream-transport'
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});
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this.winbreak = ['win', 'windows', 'dos', '\r\n'].includes((options.newline || '').toString().toLowerCase());
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}
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/**
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* Compiles a mailcomposer message and forwards it to handler that sends it
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*
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* @param {Object} emailMessage MailComposer object
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* @param {Function} callback Callback function to run when the sending is completed
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*/
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send(mail, done) {
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// We probably need this in the output
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mail.message.keepBcc = true;
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let envelope = mail.data.envelope || mail.message.getEnvelope();
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let messageId = mail.message.messageId();
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let recipients = [].concat(envelope.to || []);
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if (recipients.length > 3) {
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recipients.push('...and ' + recipients.splice(2).length + ' more');
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}
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this.logger.info(
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{
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tnx: 'send',
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messageId
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},
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'Sending message %s to <%s> using %s line breaks',
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messageId,
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recipients.join(', '),
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this.winbreak ? '<CR><LF>' : '<LF>'
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);
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setImmediate(() => {
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let stream;
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try {
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stream = mail.message.createReadStream();
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} catch (E) {
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this.logger.error(
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{
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err: E,
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tnx: 'send',
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messageId
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},
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'Creating send stream failed for %s. %s',
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messageId,
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E.message
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);
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return done(E);
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}
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if (!this.options.buffer) {
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stream.once('error', err => {
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this.logger.error(
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{
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err,
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tnx: 'send',
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messageId
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},
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'Failed creating message for %s. %s',
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messageId,
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err.message
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);
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});
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return done(null, {
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envelope: mail.data.envelope || mail.message.getEnvelope(),
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messageId,
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message: stream
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});
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}
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let chunks = [];
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let chunklen = 0;
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stream.on('readable', () => {
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let chunk;
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while ((chunk = stream.read()) !== null) {
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chunks.push(chunk);
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chunklen += chunk.length;
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}
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});
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stream.once('error', err => {
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this.logger.error(
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{
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err,
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tnx: 'send',
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messageId
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},
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'Failed creating message for %s. %s',
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messageId,
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err.message
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);
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return done(err);
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});
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stream.on('end', () =>
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done(null, {
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envelope: mail.data.envelope || mail.message.getEnvelope(),
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messageId,
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message: Buffer.concat(chunks, chunklen)
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})
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);
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});
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}
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}
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module.exports = StreamTransport;
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