134 lines
3.2 KiB
JavaScript
134 lines
3.2 KiB
JavaScript
'use strict';
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const MailParser = require('./mail-parser.js');
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module.exports = (input, options, callback) => {
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if (!callback && typeof options === 'function') {
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callback = options;
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options = false;
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}
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let promise;
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if (!callback) {
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promise = new Promise((resolve, reject) => {
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callback = callbackPromise(resolve, reject);
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});
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}
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options = options || {};
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let keepCidLinks = !!options.keepCidLinks;
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let mail = {
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attachments: []
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};
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let parser = new MailParser(options);
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parser.on('error', err => {
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callback(err);
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});
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parser.on('headers', headers => {
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mail.headers = headers;
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mail.headerLines = parser.headerLines;
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});
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let reading = false;
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let reader = () => {
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reading = true;
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let data = parser.read();
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if (data === null) {
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reading = false;
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return;
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}
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if (data.type === 'text') {
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Object.keys(data).forEach(key => {
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if (['text', 'html', 'textAsHtml'].includes(key)) {
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mail[key] = data[key];
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}
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});
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}
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if (data.type === 'attachment') {
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mail.attachments.push(data);
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let chunks = [];
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let chunklen = 0;
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data.content.on('readable', () => {
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let chunk;
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while ((chunk = data.content.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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data.content.on('end', () => {
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data.content = Buffer.concat(chunks, chunklen);
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data.release();
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reader();
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});
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} else {
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reader();
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}
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};
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parser.on('readable', () => {
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if (!reading) {
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reader();
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}
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});
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parser.on('end', () => {
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['subject', 'references', 'date', 'to', 'from', 'to', 'cc', 'bcc', 'message-id', 'in-reply-to', 'reply-to'].forEach(key => {
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if (mail.headers.has(key)) {
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mail[key.replace(/-([a-z])/g, (m, c) => c.toUpperCase())] = mail.headers.get(key);
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}
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});
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if (keepCidLinks) {
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return callback(null, mail);
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}
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parser.updateImageLinks(
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(attachment, done) => done(false, 'data:' + attachment.contentType + ';base64,' + attachment.content.toString('base64')),
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(err, html) => {
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if (err) {
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return callback(err);
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}
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mail.html = html;
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callback(null, mail);
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}
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);
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});
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if (typeof input === 'string') {
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parser.end(Buffer.from(input));
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} else if (Buffer.isBuffer(input)) {
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parser.end(input);
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} else {
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input
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.once('error', err => {
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input.destroy();
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parser.destroy();
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callback(err);
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})
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.pipe(parser);
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}
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return promise;
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};
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function callbackPromise(resolve, reject) {
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return function(...args) {
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let err = args.shift();
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if (err) {
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reject(err);
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} else {
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resolve(...args);
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}
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};
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}
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