mirror of
https://github.com/n8n-io/n8n.git
synced 2024-09-21 07:17:38 -07:00
441 lines
12 KiB
TypeScript
441 lines
12 KiB
TypeScript
import { ITriggerFunctions } from 'n8n-core';
|
|
import {
|
|
IBinaryData,
|
|
IBinaryKeyData,
|
|
IDataObject,
|
|
INodeExecutionData,
|
|
INodeType,
|
|
INodeTypeDescription,
|
|
ITriggerResponse,
|
|
NodeOperationError,
|
|
} from 'n8n-workflow';
|
|
|
|
import {
|
|
connect as imapConnect,
|
|
getParts,
|
|
ImapSimple,
|
|
ImapSimpleOptions,
|
|
Message,
|
|
} from 'imap-simple';
|
|
import {
|
|
simpleParser,
|
|
Source as ParserSource,
|
|
} from 'mailparser';
|
|
|
|
import * as lodash from 'lodash';
|
|
|
|
export class EmailReadImap implements INodeType {
|
|
description: INodeTypeDescription = {
|
|
displayName: 'EmailReadImap',
|
|
name: 'emailReadImap',
|
|
icon: 'fa:inbox',
|
|
group: ['trigger'],
|
|
version: 1,
|
|
description: 'Triggers the workflow when a new email gets received',
|
|
defaults: {
|
|
name: 'IMAP Email',
|
|
color: '#44AA22',
|
|
},
|
|
inputs: [],
|
|
outputs: ['main'],
|
|
credentials: [
|
|
{
|
|
name: 'imap',
|
|
required: true,
|
|
},
|
|
],
|
|
properties: [
|
|
{
|
|
displayName: 'Mailbox Name',
|
|
name: 'mailbox',
|
|
type: 'string',
|
|
default: 'INBOX',
|
|
},
|
|
{
|
|
displayName: 'Action',
|
|
name: 'postProcessAction',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'Mark as read',
|
|
value: 'read',
|
|
},
|
|
{
|
|
name: 'Nothing',
|
|
value: 'nothing',
|
|
},
|
|
],
|
|
default: 'read',
|
|
description: 'What to do after the email has been received. If "nothing" gets<br />selected it will be processed multiple times.',
|
|
},
|
|
{
|
|
displayName: 'Download Attachments',
|
|
name: 'downloadAttachments',
|
|
type: 'boolean',
|
|
default: false,
|
|
displayOptions: {
|
|
show: {
|
|
format: [
|
|
'simple',
|
|
],
|
|
},
|
|
},
|
|
description: 'If attachments of emails should be downloaded.<br />Only set if needed as it increases processing.',
|
|
},
|
|
{
|
|
displayName: 'Format',
|
|
name: 'format',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'RAW',
|
|
value: 'raw',
|
|
description: 'Returns the full email message data with body content in the raw field as a base64url encoded string; the payload field is not used.',
|
|
},
|
|
{
|
|
name: 'Resolved',
|
|
value: 'resolved',
|
|
description: 'Returns the full email with all data resolved and attachments saved as binary data.',
|
|
},
|
|
{
|
|
name: 'Simple',
|
|
value: 'simple',
|
|
description: 'Returns the full email; do not use if you wish to gather inline attachments.',
|
|
},
|
|
],
|
|
default: 'simple',
|
|
description: 'The format to return the message in',
|
|
},
|
|
{
|
|
displayName: 'Property Prefix Name',
|
|
name: 'dataPropertyAttachmentsPrefixName',
|
|
type: 'string',
|
|
default: 'attachment_',
|
|
displayOptions: {
|
|
show: {
|
|
format: [
|
|
'resolved',
|
|
],
|
|
},
|
|
},
|
|
description: 'Prefix for name of the binary property to which to<br />write the attachments. An index starting with 0 will be added.<br />So if name is "attachment_" the first attachment is saved to "attachment_0"',
|
|
},
|
|
{
|
|
displayName: 'Property Prefix Name',
|
|
name: 'dataPropertyAttachmentsPrefixName',
|
|
type: 'string',
|
|
default: 'attachment_',
|
|
displayOptions: {
|
|
show: {
|
|
format: [
|
|
'simple',
|
|
],
|
|
downloadAttachments: [
|
|
true,
|
|
],
|
|
},
|
|
},
|
|
description: 'Prefix for name of the binary property to which to<br />write the attachments. An index starting with 0 will be added.<br />So if name is "attachment_" the first attachment is saved to "attachment_0"',
|
|
},
|
|
{
|
|
displayName: 'Options',
|
|
name: 'options',
|
|
type: 'collection',
|
|
placeholder: 'Add Option',
|
|
default: {},
|
|
options: [
|
|
{
|
|
displayName: 'Custom email rules',
|
|
name: 'customEmailConfig',
|
|
type: 'string',
|
|
default: '["UNSEEN"]',
|
|
description: 'Custom email fetching rules. See <a href="https://github.com/mscdex/node-imap">node-imap</a>\'s search function for more details',
|
|
},
|
|
{
|
|
displayName: 'Ignore SSL Issues',
|
|
name: 'allowUnauthorizedCerts',
|
|
type: 'boolean',
|
|
default: false,
|
|
description: 'Do connect even if SSL certificate validation is not possible.',
|
|
},
|
|
],
|
|
},
|
|
],
|
|
};
|
|
|
|
|
|
|
|
async trigger(this: ITriggerFunctions): Promise<ITriggerResponse> {
|
|
const credentials = this.getCredentials('imap');
|
|
|
|
if (credentials === undefined) {
|
|
throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
|
|
}
|
|
|
|
const mailbox = this.getNodeParameter('mailbox') as string;
|
|
const postProcessAction = this.getNodeParameter('postProcessAction') as string;
|
|
const options = this.getNodeParameter('options', {}) as IDataObject;
|
|
|
|
let searchCriteria = [
|
|
'UNSEEN',
|
|
];
|
|
if (options.customEmailConfig !== undefined) {
|
|
try {
|
|
searchCriteria = JSON.parse(options.customEmailConfig as string);
|
|
} catch (error) {
|
|
throw new NodeOperationError(this.getNode(), `Custom email config is not valid JSON.`);
|
|
}
|
|
}
|
|
|
|
// Returns the email text
|
|
const getText = async (parts: any[], message: Message, subtype: string) => { // tslint:disable-line:no-any
|
|
if (!message.attributes.struct) {
|
|
return '';
|
|
}
|
|
|
|
const textParts = parts.filter((part) => {
|
|
return part.type.toUpperCase() === 'TEXT' && part.subtype.toUpperCase() === subtype.toUpperCase();
|
|
});
|
|
|
|
if (textParts.length === 0) {
|
|
return '';
|
|
}
|
|
|
|
try{
|
|
return await connection.getPartData(message, textParts[0]);
|
|
} catch {
|
|
return '';
|
|
}
|
|
};
|
|
|
|
|
|
// Returns the email attachments
|
|
const getAttachment = async (connection: ImapSimple, parts: any[], message: Message): Promise<IBinaryData[]> => { // tslint:disable-line:no-any
|
|
if (!message.attributes.struct) {
|
|
return [];
|
|
}
|
|
|
|
// Check if the message has attachments and if so get them
|
|
const attachmentParts = parts.filter((part) => {
|
|
return part.disposition && part.disposition.type.toUpperCase() === 'ATTACHMENT';
|
|
});
|
|
|
|
const attachmentPromises = [];
|
|
let attachmentPromise;
|
|
for (const attachmentPart of attachmentParts) {
|
|
attachmentPromise = connection.getPartData(message, attachmentPart)
|
|
.then((partData) => {
|
|
// Return it in the format n8n expects
|
|
return this.helpers.prepareBinaryData(partData, attachmentPart.disposition.params.filename);
|
|
});
|
|
|
|
attachmentPromises.push(attachmentPromise);
|
|
}
|
|
|
|
return Promise.all(attachmentPromises);
|
|
};
|
|
|
|
|
|
// Returns all the new unseen messages
|
|
const getNewEmails = async (connection: ImapSimple, searchCriteria: string[]): Promise<INodeExecutionData[]> => {
|
|
const format = this.getNodeParameter('format', 0) as string;
|
|
|
|
let fetchOptions = {};
|
|
|
|
if (format === 'simple' || format === 'raw') {
|
|
fetchOptions = {
|
|
bodies: ['TEXT', 'HEADER'],
|
|
markSeen: postProcessAction === 'read',
|
|
struct: true,
|
|
};
|
|
} else if (format === 'resolved') {
|
|
fetchOptions = {
|
|
bodies: [''],
|
|
markSeen: postProcessAction === 'read',
|
|
struct: true,
|
|
};
|
|
}
|
|
|
|
const results = await connection.search(searchCriteria, fetchOptions);
|
|
|
|
const newEmails: INodeExecutionData[] = [];
|
|
let newEmail: INodeExecutionData, messageHeader, messageBody;
|
|
let attachments: IBinaryData[];
|
|
let propertyName: string;
|
|
|
|
// All properties get by default moved to metadata except the ones
|
|
// which are defined here which get set on the top level.
|
|
const topLevelProperties = [
|
|
'cc',
|
|
'date',
|
|
'from',
|
|
'subject',
|
|
'to',
|
|
];
|
|
|
|
if (format === 'resolved') {
|
|
const dataPropertyAttachmentsPrefixName = this.getNodeParameter('dataPropertyAttachmentsPrefixName') as string;
|
|
|
|
for (const message of results) {
|
|
const part = lodash.find(message.parts, { which: '' });
|
|
|
|
if (part === undefined) {
|
|
throw new NodeOperationError(this.getNode(), 'Email part could not be parsed.');
|
|
}
|
|
const parsedEmail = await parseRawEmail.call(this, part.body, dataPropertyAttachmentsPrefixName);
|
|
|
|
newEmails.push(parsedEmail);
|
|
}
|
|
} else if (format === 'simple') {
|
|
const downloadAttachments = this.getNodeParameter('downloadAttachments') as boolean;
|
|
|
|
let dataPropertyAttachmentsPrefixName = '';
|
|
if (downloadAttachments === true) {
|
|
dataPropertyAttachmentsPrefixName = this.getNodeParameter('dataPropertyAttachmentsPrefixName') as string;
|
|
}
|
|
|
|
for (const message of results) {
|
|
const parts = getParts(message.attributes.struct!);
|
|
|
|
newEmail = {
|
|
json: {
|
|
textHtml: await getText(parts, message, 'html'),
|
|
textPlain: await getText(parts, message, 'plain'),
|
|
metadata: {} as IDataObject,
|
|
},
|
|
};
|
|
|
|
messageHeader = message.parts.filter((part) => {
|
|
return part.which === 'HEADER';
|
|
});
|
|
|
|
messageBody = messageHeader[0].body;
|
|
for (propertyName of Object.keys(messageBody)) {
|
|
if (messageBody[propertyName].length) {
|
|
if (topLevelProperties.includes(propertyName)) {
|
|
newEmail.json[propertyName] = messageBody[propertyName][0];
|
|
} else {
|
|
(newEmail.json.metadata as IDataObject)[propertyName] = messageBody[propertyName][0];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (downloadAttachments === true) {
|
|
// Get attachments and add them if any get found
|
|
attachments = await getAttachment(connection, parts, message);
|
|
if (attachments.length) {
|
|
newEmail.binary = {};
|
|
for (let i = 0; i < attachments.length; i++) {
|
|
newEmail.binary[`${dataPropertyAttachmentsPrefixName}${i}`] = attachments[i];
|
|
}
|
|
}
|
|
}
|
|
|
|
newEmails.push(newEmail);
|
|
}
|
|
} else if (format === 'raw') {
|
|
for (const message of results) {
|
|
const part = lodash.find(message.parts, { which: 'TEXT' });
|
|
|
|
if (part === undefined) {
|
|
throw new NodeOperationError(this.getNode(), 'Email part could not be parsed.');
|
|
}
|
|
// Return base64 string
|
|
newEmail = {
|
|
json: {
|
|
raw: part.body,
|
|
},
|
|
};
|
|
|
|
newEmails.push(newEmail);
|
|
}
|
|
}
|
|
|
|
return newEmails;
|
|
};
|
|
|
|
const establishConnection = (): Promise<ImapSimple> => {
|
|
const config: ImapSimpleOptions = {
|
|
imap: {
|
|
user: credentials.user as string,
|
|
password: credentials.password as string,
|
|
host: credentials.host as string,
|
|
port: credentials.port as number,
|
|
tls: credentials.secure as boolean,
|
|
authTimeout: 20000,
|
|
},
|
|
onmail: async () => {
|
|
if (connection) {
|
|
const returnData = await getNewEmails(connection, searchCriteria);
|
|
|
|
if (returnData.length) {
|
|
this.emit([returnData]);
|
|
}
|
|
}
|
|
},
|
|
};
|
|
|
|
if (options.allowUnauthorizedCerts === true) {
|
|
config.imap.tlsOptions = {
|
|
rejectUnauthorized: false,
|
|
};
|
|
}
|
|
|
|
// Connect to the IMAP server and open the mailbox
|
|
// that we get informed whenever a new email arrives
|
|
return imapConnect(config).then(async conn => {
|
|
conn.on('error', async err => {
|
|
if (err.code.toUpperCase() === 'ECONNRESET') {
|
|
connection = await establishConnection();
|
|
}
|
|
throw err;
|
|
});
|
|
return conn;
|
|
});
|
|
};
|
|
|
|
let connection: ImapSimple = await establishConnection();
|
|
|
|
await connection.openBox(mailbox);
|
|
|
|
// When workflow and so node gets set to inactive close the connectoin
|
|
async function closeFunction() {
|
|
await connection.end();
|
|
}
|
|
|
|
return {
|
|
closeFunction,
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
export async function parseRawEmail(this: ITriggerFunctions, messageEncoded: ParserSource, dataPropertyNameDownload: string): Promise<INodeExecutionData> {
|
|
const responseData = await simpleParser(messageEncoded);
|
|
const headers: IDataObject = {};
|
|
for (const header of responseData.headerLines) {
|
|
headers[header.key] = header.line;
|
|
}
|
|
|
|
// @ts-ignore
|
|
responseData.headers = headers;
|
|
// @ts-ignore
|
|
responseData.headerLines = undefined;
|
|
|
|
const binaryData: IBinaryKeyData = {};
|
|
if (responseData.attachments) {
|
|
|
|
for (let i = 0; i < responseData.attachments.length; i++) {
|
|
const attachment = responseData.attachments[i];
|
|
binaryData[`${dataPropertyNameDownload}${i}`] = await this.helpers.prepareBinaryData(attachment.content, attachment.filename, attachment.contentType);
|
|
}
|
|
// @ts-ignore
|
|
responseData.attachments = undefined;
|
|
}
|
|
|
|
return {
|
|
json: responseData as unknown as IDataObject,
|
|
binary: Object.keys(binaryData).length ? binaryData : undefined,
|
|
} as INodeExecutionData;
|
|
}
|