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61-email.js
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61-email.js
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/* eslint-disable indent */
const { domainToUnicode } = require("url");
/**
* POP3 protocol - RFC1939 - https://www.ietf.org/rfc/rfc1939.txt
*
* Dependencies:
* * node-pop3 - https://www.npmjs.com/package/node-pop3
* * nodemailer - https://www.npmjs.com/package/nodemailer
* * imap - https://www.npmjs.com/package/imap
* * mailparser - https://www.npmjs.com/package/mailparser
*/
module.exports = function(RED) {
"use strict";
var Imap = require('imap');
var Pop3Command = require("node-pop3");
var nodemailer = require("nodemailer");
var simpleParser = require("mailparser").simpleParser;
var SMTPServer = require("smtp-server").SMTPServer;
//var microMTA = require("micromta").microMTA;
var fs = require('fs');
if (parseInt(process.version.split("v")[1].split(".")[0]) < 8) {
throw "Error : Requires nodejs version >= 8.";
}
function EmailNode(n) {
RED.nodes.createNode(this,n);
this.topic = n.topic;
this.name = n.name;
this.outserver = n.server;
this.outport = n.port;
this.secure = n.secure;
this.tls = n.tls;
this.authtype = n.authtype || "BASIC";
if (this.authtype !== "BASIC") {
this.inputs = 1;
this.repeat = 0;
}
if (this.credentials && this.credentials.hasOwnProperty("userid")) {
this.userid = this.credentials.userid;
}
else if (this.authtype !== "NONE") {
this.error(RED._("email.errors.nouserid"));
}
if (this.authtype === "BASIC" ) {
if (this.credentials && this.credentials.hasOwnProperty("password")) {
this.password = this.credentials.password;
}
else {
this.error(RED._("email.errors.nopassword"));
}
}
else if (this.authtype === "XOAUTH2") {
this.saslformat = n.saslformat;
if (n.token !== "") {
this.token = n.token;
} else {
this.error(RED._("email.errors.notoken"));
}
}
var node = this;
var smtpOptions = {
host: node.outserver,
port: node.outport,
secure: node.secure,
tls: {rejectUnauthorized: node.tls}
}
var smtpTransport;
if (node.authtype === "XOAUTH2") {
node.log("Using OAuth - setup transport later.")
}
else {
if (node.authtype === "BASIC" ) {
smtpOptions.auth = {
user: node.userid,
pass: node.password
};
}
smtpTransport = nodemailer.createTransport(smtpOptions);
}
this.on("input", function(msg, send, done) {
if (node.authtype === "XOAUTH2") {
if (node.token) {
var saslxoauth2 = "";
var value = RED.util.getMessageProperty(msg,node.token);
if (value !== undefined) {
if (node.saslformat) {
//Make base64 string for access - compatible with outlook365 and gmail
saslxoauth2 = Buffer.from("user="+node.userid+"\x01auth=Bearer "+value+"\x01\x01").toString('base64');
} else {
saslxoauth2 = value;
}
}
smtpOptions.auth = {
type: "OAuth2",
user: node.userid,
accessToken: saslxoauth2
};
smtpTransport = nodemailer.createTransport(smtpOptions);
}
else {
node.warn(RED._("email.errors.notoken"));
}
}
if (msg.hasOwnProperty("payload")) {
send = send || function() { node.send.apply(node,arguments) };
if (smtpTransport) {
node.status({fill:"blue",shape:"dot",text:"email.status.sending"});
if (msg.to && node.name && (msg.to !== node.name)) {
node.warn(RED._("node-red:common.errors.nooverride"));
}
var sendopts = { from: ((msg.from) ? msg.from : node.userid) }; // sender address
sendopts.to = node.name || msg.to; // comma separated list of addresses
if (node.name === "") {
sendopts.cc = msg.cc;
sendopts.bcc = msg.bcc;
sendopts.inReplyTo = msg.inReplyTo;
sendopts.replyTo = msg.replyTo;
sendopts.references = msg.references;
sendopts.headers = msg.headers;
sendopts.priority = msg.priority;
}
if (msg.hasOwnProperty("topic") && msg.topic === '') { sendopts.subject = ""; }
else { sendopts.subject = msg.topic || msg.title || "Message from Node-RED"; } // subject line
if (msg.hasOwnProperty("header") && msg.header.hasOwnProperty("message-id")) {
sendopts.inReplyTo = msg.header["message-id"];
sendopts.subject = "Re: " + sendopts.subject;
}
if (msg.hasOwnProperty("envelope")) { sendopts.envelope = msg.envelope; }
if (Buffer.isBuffer(msg.payload)) { // if it's a buffer in the payload then auto create an attachment instead
if (!msg.filename) {
var fe = "bin";
if ((msg.payload[0] === 0xFF)&&(msg.payload[1] === 0xD8)) { fe = "jpg"; }
if ((msg.payload[0] === 0x47)&&(msg.payload[1] === 0x49)) { fe = "gif"; } //46
if ((msg.payload[0] === 0x42)&&(msg.payload[1] === 0x4D)) { fe = "bmp"; }
if ((msg.payload[0] === 0x89)&&(msg.payload[1] === 0x50)) { fe = "png"; } //4E
msg.filename = "attachment."+fe;
}
var fname = msg.filename.replace(/^.*[\\\/]/, '') || "attachment.bin";
sendopts.attachments = [ { content:msg.payload, filename:fname } ];
if (msg.hasOwnProperty("headers") && msg.headers.hasOwnProperty("content-type")) {
sendopts.attachments[0].contentType = msg.headers["content-type"];
}
// Create some body text..
if (msg.hasOwnProperty("description")) { sendopts.text = msg.description; }
else { sendopts.text = RED._("email.default-message",{filename:fname}); }
}
else {
var payload = RED.util.ensureString(msg.payload);
sendopts.text = payload; // plaintext body
if (/<[a-z][\s\S]*>/i.test(payload)) {
sendopts.html = payload; // html body
if (msg.hasOwnProperty("plaintext")) {
var plaintext = RED.util.ensureString(msg.plaintext);
sendopts.text = plaintext; // plaintext body - specific plaintext version
}
}
if (msg.attachments) {
if (!Array.isArray(msg.attachments)) { sendopts.attachments = [ msg.attachments ]; }
else { sendopts.attachments = msg.attachments; }
for (const attachment of sendopts.attachments) {
if (attachment.hasOwnProperty('content')) {
if (typeof attachment.content !== 'string' && !Buffer.isBuffer(attachment.content)) {
node.error(RED._("email.errors.invalidattachment"),msg);
node.status({fill:"red",shape:"ring",text:"email.status.sendfail"});
return;
}
}
}
}
}
smtpTransport.sendMail(sendopts, function(error, info) {
if (error) {
node.error(error,msg);
node.status({fill:"red",shape:"ring",text:"email.status.sendfail",response:error.response,msg:{to:msg.to,topic:msg.topic,id:msg._msgid}});
} else {
node.log(RED._("email.status.messagesent",{response:info.response}));
node.status({text:"",response:info.response,msg:{to:msg.to,topic:msg.topic,id:msg._msgid}});
if (done) { done(); }
}
});
}
else { node.warn(RED._("email.errors.nosmtptransport")); }
}
else { node.warn(RED._("email.errors.nopayload")); }
});
}
RED.nodes.registerType("e-mail", EmailNode, {
credentials: {
userid: {type:"text"},
password: {type: "password"},
global: { type:"boolean"}
}
});
//
// EmailInNode
//
// Setup the EmailInNode
function EmailInNode(n) {
var imap;
var pop3;
RED.nodes.createNode(this,n);
this.name = n.name;
this.inputs = n.inputs;
this.repeat = n.repeat * 1000 || 300000;
if (this.repeat > 2147483647) {
// setTimeout/Interval has a limit of 2**31-1 Milliseconds
this.repeat = 2147483647;
this.error(RED._("email.errors.refreshtoolarge"));
}
if (this.repeat < 1500) {
this.repeat = 1500;
}
if (this.inputs === 1) { this.repeat = 0; }
this.inserver = n.server || "imap.gmail.com";
this.inport = n.port || "993";
this.box = n.box || "INBOX";
this.useSSL= n.useSSL;
this.autotls= n.autotls;
this.protocol = n.protocol || "IMAP";
this.disposition = n.disposition || "None"; // "None", "Delete", "Read"
this.criteria = n.criteria || "UNSEEN"; // "ALL", "ANSWERED", "FLAGGED", "SEEN", "UNANSWERED", "UNFLAGGED", "UNSEEN"
this.authtype = n.authtype || "BASIC";
if (this.authtype !== "BASIC") {
this.inputs = 1;
this.repeat = 0;
}
if (this.credentials && this.credentials.hasOwnProperty("userid")) {
this.userid = this.credentials.userid;
}
else if (this.authtype !== "NONE") {
this.error(RED._("email.errors.nouserid"));
}
if (this.authtype === "BASIC" ) {
if (this.credentials && this.credentials.hasOwnProperty("password")) {
this.password = this.credentials.password;
}
else {
this.error(RED._("email.errors.nopassword"));
}
}
else if (this.authtype === "XOAUTH2") {
this.saslformat = n.saslformat;
if (n.token !== "") {
this.token = n.token;
} else {
this.error(RED._("email.errors.notoken"));
}
}
var node = this;
node.interval_id = null;
// Process a new email message by building a Node-RED message to be passed onwards
// in the message flow. The parameter called `msg` is the template message we
// start with while `mailMessage` is an object returned from `mailparser` that
// will be used to populate the email.
// DCJ NOTE: - heirachical multipart mime parsers seem to not exist - this one is barely functional.
function processNewMessage(msg, mailMessage) {
msg = RED.util.cloneMessage(msg); // Clone the message
// Populate the msg fields from the content of the email message
// that we have just parsed.
msg.payload = mailMessage.text;
msg.topic = mailMessage.subject;
msg.date = mailMessage.date;
msg.header = {};
mailMessage.headers.forEach((v, k) => {msg.header[k] = v;});
if (mailMessage.html) { msg.html = mailMessage.html; }
if (mailMessage.to && mailMessage.to.length > 0) { msg.to = mailMessage.to; }
if (mailMessage.cc && mailMessage.cc.length > 0) { msg.cc = mailMessage.cc; }
if (mailMessage.bcc && mailMessage.bcc.length > 0) { msg.bcc = mailMessage.bcc; }
if (mailMessage.from && mailMessage.from.value && mailMessage.from.value.length > 0) { msg.from = mailMessage.from.value[0].address; }
if (mailMessage.attachments) { msg.attachments = mailMessage.attachments; }
else { msg.attachments = []; }
node.send(msg); // Propagate the message down the flow
} // End of processNewMessage
// Check the POP3 email mailbox for any new messages. For any that are found,
// retrieve each message, call processNewMessage to process it and then delete
// the messages from the server.
async function checkPOP3(msg,send,done) {
var tout = (node.repeat > 0) ? node.repeat - 500 : 15000;
var saslxoauth2 = "";
var currentMessage = 1;
var maxMessage = 0;
var nextMessage;
pop3 = new Pop3Command({
"host": node.inserver,
"tls": node.useSSL,
"timeout": tout,
"port": node.inport
});
try {
node.status({fill:"grey",shape:"dot",text:"node-red:common.status.connecting"});
await pop3.connect();
if (node.authtype === "XOAUTH2") {
var value = RED.util.getMessageProperty(msg,node.token);
if (value !== undefined) {
if (node.saslformat) {
//Make base64 string for access - compatible with outlook365 and gmail
saslxoauth2 = Buffer.from("user="+node.userid+"\x01auth=Bearer "+value+"\x01\x01").toString('base64');
} else {
saslxoauth2 = value;
}
}
await pop3.command('AUTH', "XOAUTH2");
await pop3.command(saslxoauth2);
} else if (node.authtype === "BASIC") {
await pop3.command('USER', node.userid);
await pop3.command('PASS', node.password);
}
} catch(err) {
node.error(err.message,err);
node.status({fill:"red",shape:"ring",text:"email.status.connecterror"});
setInputRepeatTimeout();
done();
return;
}
maxMessage = (await pop3.STAT()).split(" ")[0];
if (maxMessage>0) {
node.status({fill:"blue", shape:"dot", text:"email.status.fetching"});
while(currentMessage<=maxMessage) {
try {
nextMessage = await pop3.RETR(currentMessage);
} catch(err) {
node.error(RED._("email.errors.fetchfail", err.message),err);
node.status({fill:"red",shape:"ring",text:"email.status.fetcherror"});
setInputRepeatTimeout();
done();
return;
}
try {
// We have now received a new email message. Create an instance of a mail parser
// and pass in the email message. The parser will signal when it has parsed the message.
simpleParser(nextMessage, {checksumAlgo: 'sha256'}, function(err, parsed) {
//node.log(util.format("simpleParser: on(end): %j", mailObject));
if (err) {
node.status({fill:"red", shape:"ring", text:"email.status.parseerror"});
node.error(RED._("email.errors.parsefail", {folder:node.box}), err);
}
else {
processNewMessage(msg, parsed);
}
});
//processNewMessage(msg, nextMessage);
} catch(err) {
node.error(RED._("email.errors.parsefail", {folder:node.box}), err);
node.status({fill:"red",shape:"ring",text:"email.status.parseerror"});
setInputRepeatTimeout();
done();
return;
}
await pop3.DELE(currentMessage);
currentMessage++;
}
await pop3.QUIT();
node.status({fill:"green",shape:"dot",text:"finished"});
setTimeout(status_clear, 5000);
setInputRepeatTimeout();
done();
}
} // End of checkPOP3
//
// checkIMAP
//
// Check the email sever using the IMAP protocol for new messages.
var s = false;
var ss = false;
function checkIMAP(msg,send,done) {
var tout = (node.repeat > 0) ? node.repeat - 500 : 15000;
var saslxoauth2 = "";
if (node.authtype === "XOAUTH2") {
var value = RED.util.getMessageProperty(msg,node.token);
if (value !== undefined) {
if (node.saslformat) {
//Make base64 string for access - compatible with outlook365 and gmail
saslxoauth2 = Buffer.from("user="+node.userid+"\x01auth=Bearer "+value+"\x01\x01").toString('base64');
} else {
saslxoauth2 = value;
}
}
imap = new Imap({
xoauth2: saslxoauth2,
host: node.inserver,
port: node.inport,
tls: node.useSSL,
autotls: node.autotls,
tlsOptions: { rejectUnauthorized: false },
connTimeout: tout,
authTimeout: tout
});
} else {
imap = new Imap({
user: node.userid,
password: node.password,
host: node.inserver,
port: node.inport,
tls: node.useSSL,
autotls: node.autotls,
tlsOptions: { rejectUnauthorized: false },
connTimeout: tout,
authTimeout: tout
});
}
imap.on('error', function(err) {
if (err.errno !== "ECONNRESET") {
s = false;
node.error(err.message,err);
node.status({fill:"red",shape:"ring",text:"email.status.connecterror"});
}
setInputRepeatTimeout();
});
//console.log("Checking IMAP for new messages");
// We get back a 'ready' event once we have connected to imap
s = true;
imap.once("ready", function() {
if (ss === true) { return; }
ss = true;
node.status({fill:"blue", shape:"dot", text:"email.status.fetching"});
//console.log("> ready");
// Open the folder
imap.openBox(node.box, // Mailbox name
false, // Open readonly?
function(err, box) {
//console.log("> Inbox err : %j", err);
//console.log("> Inbox open: %j", box);
if (err) {
var boxs = [];
imap.getBoxes(function(err,boxes) {
if (err) { return; }
for (var prop in boxes) {
if (boxes.hasOwnProperty(prop)) {
if (boxes[prop].children) {
boxs.push(prop+"/{"+Object.keys(boxes[prop].children)+'}');
}
else { boxs.push(prop); }
}
}
node.error(RED._("email.errors.fetchfail", {folder:node.box+". Folders - "+boxs.join(', ')}),err);
});
node.status({fill:"red", shape:"ring", text:"email.status.foldererror"});
imap.end();
s = false;
setInputRepeatTimeout();
done(err);
return;
}
else {
var criteria = ((node.criteria === '_msg_')?
(msg.criteria || ["UNSEEN"]):
([node.criteria]));
if (Array.isArray(criteria)) {
try {
imap.search(criteria, function(err, results) {
if (err) {
node.status({fill:"red", shape:"ring", text:"email.status.foldererror"});
node.error(RED._("email.errors.fetchfail", {folder:node.box}),err);
imap.end();
s = false;
setInputRepeatTimeout();
done(err);
return;
}
else {
//console.log("> search - err=%j, results=%j", err, results);
if (results.length === 0) {
//console.log(" [X] - Nothing to fetch");
node.status({results:0});
imap.end();
s = false;
setInputRepeatTimeout();
msg.payload = 0;
done();
return;
}
var marks = false;
if (node.disposition === "Read") { marks = true; }
// We have the search results that contain the list of unseen messages and can now fetch those messages.
var fetch = imap.fetch(results, {
bodies: '',
struct: true,
markSeen: marks
});
// For each fetched message returned ...
fetch.on('message', function(imapMessage, seqno) {
//node.log(RED._("email.status.message",{number:seqno}));
//console.log("> Fetch message - msg=%j, seqno=%d", imapMessage, seqno);
imapMessage.on('body', function(stream, info) {
//console.log("> message - body - stream=?, info=%j", info);
simpleParser(stream, {checksumAlgo: 'sha256'}, function(err, parsed) {
if (err) {
node.status({fill:"red", shape:"ring", text:"email.status.parseerror"});
node.error(RED._("email.errors.parsefail", {folder:node.box}),err);
}
else {
processNewMessage(msg, parsed);
}
});
}); // End of msg->body
}); // End of fetch->message
// When we have fetched all the messages, we don't need the imap connection any more.
fetch.on('end', function() {
node.status({results:results.length});
var cleanup = function() {
imap.end();
s = false;
setInputRepeatTimeout();
msg.payload = results.length;
done();
};
if (node.disposition === "Delete") {
imap.addFlags(results, '\\Deleted', imap.expunge(cleanup) );
} else if (node.disposition === "Read") {
imap.addFlags(results, '\\Seen', cleanup);
} else {
cleanup();
}
});
fetch.once('error', function(err) {
console.log('Fetch error: ' + err);
imap.end();
s = false;
setInputRepeatTimeout();
done(err);
});
}
}); // End of imap->search
}
catch(e) {
node.status({fill:"red", shape:"ring", text:"email.status.bad_criteria"});
node.error(e.toString(),e);
s = ss = false;
imap.end();
done(e);
return;
}
}
else {
node.status({fill:"red", shape:"ring", text:"email.status.bad_criteria"});
node.error(RED._("email.errors.bad_criteria"),msg);
s = ss = false;
imap.end();
done();
return;
}
}
}); // End of imap->openInbox
}); // End of imap->ready
node.status({fill:"grey",shape:"dot",text:"node-red:common.status.connecting"});
imap.connect();
} // End of checkIMAP
// Perform a check of the email inboxes using either POP3 or IMAP
function checkEmail(msg,send,done) {
if (node.protocol === "POP3") {
checkPOP3(msg,send,done);
} else if (node.protocol === "IMAP") {
if (s === false && ss == false) { checkIMAP(msg,send,done); }
}
} // End of checkEmail
node.on("input", function(msg, send, done) {
send = send || function() { node.send.apply(node,arguments) };
checkEmail(msg,send,done);
});
node.on("close", function() {
if (this.interval_id != null) {
clearTimeout(this.interval_id);
}
if (imap) {
imap.end();
setTimeout(function() { imap.destroy(); },1000);
node.status({});
}
});
function status_clear() {
node.status({});
}
function setInputRepeatTimeout() {
// Set the repetition timer as needed
if (!isNaN(node.repeat) && node.repeat > 0) {
node.interval_id = setTimeout( function() {
node.emit("input",{});
}, node.repeat );
}
ss = false;
}
if (this.inputs !== 1) { node.emit("input",{}); }
}
RED.nodes.registerType("e-mail in",EmailInNode,{
credentials: {
userid: { type:"text" },
password: { type: "password" },
global: { type:"boolean" }
}
});
function EmailMtaNode(n) {
RED.nodes.createNode(this, n);
this.port = n.port;
this.secure = n.secure;
this.starttls = n.starttls;
this.certFile = n.certFile;
this.keyFile = n.keyFile;
this.users = n.users;
this.auth = n.auth;
try {
this.options = JSON.parse(n.expert);
} catch (error) {
this.options = {};
}
var node = this;
if (!Array.isArray(node.options.disabledCommands)) {
node.options.disabledCommands = [];
}
node.options.secure = node.secure;
if (node.certFile) {
node.options.cert = fs.readFileSync(node.certFile);
}
if (node.keyFile) {
node.options.key = fs.readFileSync(node.keyFile);
}
if (!node.starttls) {
node.options.disabledCommands.push("STARTTLS");
}
if (!node.auth) {
node.options.disabledCommands.push("AUTH");
}
node.options.onData = function (stream, session, callback) {
simpleParser(stream, { skipTextToHtml:true, skipTextLinks:true, checksumAlgo:'sha256' }, (err, parsed) => {
if (err) { node.error(RED._("email.errors.parsefail"),err); }
else {
node.status({fill:"green", shape:"dot", text:""});
var msg = {}
msg.payload = parsed.text;
msg.topic = parsed.subject;
msg.date = parsed.date;
msg.header = {};
parsed.headers.forEach((v, k) => {msg.header[k] = v;});
if (parsed.html) { msg.html = parsed.html; }
if (parsed.to) {
if (typeof(parsed.to) === "string" && parsed.to.length > 0) { msg.to = parsed.to; }
else if (parsed.to.hasOwnProperty("text") && parsed.to.text.length > 0) { msg.to = parsed.to.text; }
}
if (parsed.cc) {
if (typeof(parsed.cc) === "string" && parsed.cc.length > 0) { msg.cc = parsed.cc; }
else if (parsed.cc.hasOwnProperty("text") && parsed.cc.text.length > 0) { msg.cc = parsed.cc.text; }
}
if (parsed.cc && parsed.cc.length > 0) { msg.cc = parsed.cc; }
if (parsed.bcc && parsed.bcc.length > 0) { msg.bcc = parsed.bcc; }
if (parsed.from && parsed.from.value && parsed.from.value.length > 0) { msg.from = parsed.from.value[0].address; }
if (parsed.attachments) { msg.attachments = parsed.attachments; }
else { msg.attachments = []; }
node.send(msg); // Propagate the message down the flow
setTimeout(function() { node.status({})}, 500);
}
callback();
});
}
node.options.onAuth = function (auth, session, callback) {
let id = node.users.findIndex(function (item) {
return item.name === auth.username;
});
if (id >= 0 && node.users[id].password === auth.password) {
callback(null, { user: id + 1 });
} else {
callback(new Error("Invalid username or password"));
}
}
node.mta = new SMTPServer(node.options);
node.mta.listen(node.port);
node.mta.on("error", err => {
node.error("Error: " + err.message, err);
});
node.on("close", function() {
node.mta.close();
});
}
RED.nodes.registerType("e-mail mta",EmailMtaNode);
};