mirror of
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569 lines
14 KiB
TypeScript
569 lines
14 KiB
TypeScript
/* eslint-disable n8n-nodes-base/node-filename-against-convention */
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import * as amqplib from 'amqplib';
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import type {
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IExecuteFunctions,
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ICredentialsDecrypted,
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ICredentialTestFunctions,
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IDataObject,
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INodeCredentialTestResult,
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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JsonObject,
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} from 'n8n-workflow';
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import { NodeApiError, NodeOperationError } from 'n8n-workflow';
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import { rabbitmqConnectExchange, rabbitmqConnectQueue } from './GenericFunctions';
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import { formatPrivateKey } from '@utils/utilities';
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export class RabbitMQ implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'RabbitMQ',
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name: 'rabbitmq',
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// eslint-disable-next-line n8n-nodes-base/node-class-description-icon-not-svg
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icon: 'file:rabbitmq.svg',
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group: ['transform'],
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version: [1, 1.1],
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description: 'Sends messages to a RabbitMQ topic',
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defaults: {
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name: 'RabbitMQ',
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},
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inputs: ['main'],
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outputs: ['main'],
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credentials: [
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{
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name: 'rabbitmq',
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required: true,
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testedBy: 'rabbitmqConnectionTest',
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},
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],
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properties: [
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'hidden',
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noDataExpression: true,
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default: 'sendMessage',
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displayOptions: {
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show: {
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'@version': [1],
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},
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},
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// To remove when action view is fixed
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options: [
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{
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name: 'Send a Message to RabbitMQ',
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value: 'sendMessage',
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action: 'Send a Message to RabbitMQ',
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},
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{
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name: 'Delete From Queue',
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value: 'deleteMessage',
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action: 'Delete From Queue',
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},
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],
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},
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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noDataExpression: true,
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default: 'sendMessage',
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displayOptions: {
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show: {
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'@version': [1.1],
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},
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},
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options: [
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{
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name: 'Send a Message to RabbitMQ',
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value: 'sendMessage',
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action: 'Send a Message to RabbitMQ',
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},
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{
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name: 'Delete From Queue',
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value: 'deleteMessage',
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action: 'Delete From Queue',
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},
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],
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},
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{
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displayName:
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'Will delete an item from the queue triggered earlier in the workflow by a RabbitMQ Trigger node',
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name: 'deleteMessage',
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type: 'notice',
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default: '',
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displayOptions: {
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show: {
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operation: ['deleteMessage'],
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},
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},
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},
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{
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displayName: 'Mode',
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name: 'mode',
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type: 'options',
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displayOptions: {
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hide: {
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operation: ['deleteMessage'],
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},
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},
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options: [
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{
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name: 'Queue',
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value: 'queue',
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description: 'Publish data to queue',
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},
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{
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name: 'Exchange',
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value: 'exchange',
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description: 'Publish data to exchange',
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},
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],
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default: 'queue',
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description: 'To where data should be moved',
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},
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// ----------------------------------
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// Queue
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// ----------------------------------
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{
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displayName: 'Queue / Topic',
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name: 'queue',
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type: 'string',
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displayOptions: {
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show: {
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mode: ['queue'],
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},
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hide: {
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operation: ['deleteMessage'],
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},
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},
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default: '',
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placeholder: 'queue-name',
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description: 'Name of the queue to publish to',
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},
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// ----------------------------------
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// Exchange
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// ----------------------------------
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{
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displayName: 'Exchange',
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name: 'exchange',
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type: 'string',
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displayOptions: {
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show: {
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mode: ['exchange'],
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},
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},
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default: '',
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placeholder: 'exchange-name',
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description: 'Name of the exchange to publish to',
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},
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{
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displayName: 'Type',
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name: 'exchangeType',
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type: 'options',
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displayOptions: {
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show: {
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mode: ['exchange'],
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},
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},
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options: [
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{
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name: 'Direct',
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value: 'direct',
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description: 'Direct exchange type',
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},
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{
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name: 'Topic',
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value: 'topic',
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description: 'Topic exchange type',
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},
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{
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name: 'Headers',
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value: 'headers',
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description: 'Headers exchange type',
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},
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{
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name: 'Fanout',
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value: 'fanout',
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description: 'Fanout exchange type',
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},
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],
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default: 'fanout',
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description: 'Type of exchange',
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},
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{
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displayName: 'Routing Key',
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name: 'routingKey',
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type: 'string',
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displayOptions: {
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show: {
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mode: ['exchange'],
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},
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},
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default: '',
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placeholder: 'routing-key',
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description: 'The routing key for the message',
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},
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// ----------------------------------
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// Default
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// ----------------------------------
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{
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displayName: 'Send Input Data',
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name: 'sendInputData',
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type: 'boolean',
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displayOptions: {
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show: {
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operation: ['sendMessage'],
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},
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},
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default: true,
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description: 'Whether to send the data the node receives as JSON',
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},
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{
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displayName: 'Message',
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name: 'message',
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type: 'string',
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displayOptions: {
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show: {
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sendInputData: [false],
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},
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},
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default: '',
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description: 'The message to be sent',
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},
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{
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displayName: 'Options',
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name: 'options',
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type: 'collection',
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default: {},
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displayOptions: {
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show: {
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operation: ['sendMessage'],
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},
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},
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placeholder: 'Add Option',
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options: [
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{
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displayName: 'Alternate Exchange',
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name: 'alternateExchange',
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type: 'string',
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displayOptions: {
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show: {
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'/mode': ['exchange'],
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},
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},
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default: '',
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description:
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'An exchange to send messages to if this exchange can’t route them to any queues',
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},
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{
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displayName: 'Arguments',
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name: 'arguments',
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placeholder: 'Add Argument',
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description: 'Arguments to add',
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type: 'fixedCollection',
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typeOptions: {
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multipleValues: true,
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},
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default: {},
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options: [
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{
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name: 'argument',
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displayName: 'Argument',
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values: [
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{
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displayName: 'Key',
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name: 'key',
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type: 'string',
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default: '',
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},
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{
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displayName: 'Value',
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name: 'value',
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type: 'string',
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default: '',
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},
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],
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},
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],
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},
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{
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displayName: 'Auto Delete Queue',
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name: 'autoDelete',
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type: 'boolean',
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default: false,
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description:
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'Whether the queue will be deleted when the number of consumers drops to zero',
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},
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{
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displayName: 'Durable',
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name: 'durable',
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type: 'boolean',
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default: true,
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description: 'Whether the queue will survive broker restarts',
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},
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{
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displayName: 'Exclusive',
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name: 'exclusive',
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type: 'boolean',
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displayOptions: {
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show: {
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'/mode': ['queue'],
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},
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},
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default: false,
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description: 'Whether to scope the queue to the connection',
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},
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{
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displayName: 'Headers',
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name: 'headers',
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placeholder: 'Add Header',
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description: 'Headers to add',
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type: 'fixedCollection',
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typeOptions: {
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multipleValues: true,
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},
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default: {},
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options: [
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{
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name: 'header',
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displayName: 'Header',
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values: [
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{
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displayName: 'Key',
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name: 'key',
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type: 'string',
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default: '',
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},
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{
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displayName: 'Value',
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name: 'value',
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type: 'string',
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default: '',
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},
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],
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},
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],
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},
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],
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},
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],
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};
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methods = {
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credentialTest: {
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async rabbitmqConnectionTest(
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this: ICredentialTestFunctions,
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credential: ICredentialsDecrypted,
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): Promise<INodeCredentialTestResult> {
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const credentials = credential.data as IDataObject;
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try {
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const credentialKeys = ['hostname', 'port', 'username', 'password', 'vhost'];
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const credentialData: IDataObject = {};
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credentialKeys.forEach((key) => {
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credentialData[key] = credentials[key] === '' ? undefined : credentials[key];
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});
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const optsData: IDataObject = {};
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if (credentials.ssl === true) {
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credentialData.protocol = 'amqps';
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optsData.ca =
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credentials.ca === ''
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? undefined
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: [Buffer.from(formatPrivateKey(credentials.ca as string))];
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if (credentials.passwordless === true) {
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optsData.cert =
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credentials.cert === ''
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? undefined
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: Buffer.from(formatPrivateKey(credentials.cert as string));
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optsData.key =
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credentials.key === ''
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? undefined
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: Buffer.from(formatPrivateKey(credentials.key as string));
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optsData.passphrase =
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credentials.passphrase === '' ? undefined : credentials.passphrase;
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optsData.credentials = amqplib.credentials.external();
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}
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}
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const connection = await amqplib.connect(credentialData, optsData);
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await connection.close();
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} catch (error) {
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return {
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status: 'Error',
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message: error.message,
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};
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}
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return {
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status: 'OK',
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message: 'Connection successful!',
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};
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},
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},
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};
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async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
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let channel, options: IDataObject;
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try {
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const items = this.getInputData();
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const operation = this.getNodeParameter('operation', 0);
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if (operation === 'deleteMessage') {
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this.sendResponse(items[0].json);
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return [items];
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}
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const mode = (this.getNodeParameter('mode', 0) as string) || 'queue';
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const returnItems: INodeExecutionData[] = [];
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if (mode === 'queue') {
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const queue = this.getNodeParameter('queue', 0) as string;
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options = this.getNodeParameter('options', 0, {});
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channel = await rabbitmqConnectQueue.call(this, queue, options);
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const sendInputData = this.getNodeParameter('sendInputData', 0) as boolean;
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let message: string;
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const queuePromises = [];
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for (let i = 0; i < items.length; i++) {
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if (sendInputData) {
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message = JSON.stringify(items[i].json);
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} else {
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message = this.getNodeParameter('message', i) as string;
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}
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let headers: IDataObject = {};
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if (
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options.headers &&
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((options.headers as IDataObject).header! as IDataObject[]).length
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) {
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const itemOptions = this.getNodeParameter('options', i, {});
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const additionalHeaders: IDataObject = {};
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((itemOptions.headers as IDataObject).header as IDataObject[]).forEach(
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(header: IDataObject) => {
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additionalHeaders[header.key as string] = header.value;
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},
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);
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headers = additionalHeaders;
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}
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queuePromises.push(channel.sendToQueue(queue, Buffer.from(message), { headers }));
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}
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// @ts-ignore
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const promisesResponses = await Promise.allSettled(queuePromises);
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// @ts-ignore
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promisesResponses.forEach((response: JsonObject) => {
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if (response.status !== 'fulfilled') {
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if (!this.continueOnFail()) {
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throw new NodeApiError(this.getNode(), response);
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} else {
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// Return the actual reason as error
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returnItems.push({
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json: {
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error: response.reason,
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},
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});
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return;
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}
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}
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returnItems.push({
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json: {
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success: response.value,
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},
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});
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});
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await channel.close();
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await channel.connection.close();
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} else if (mode === 'exchange') {
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const exchange = this.getNodeParameter('exchange', 0) as string;
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const type = this.getNodeParameter('exchangeType', 0) as string;
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const routingKey = this.getNodeParameter('routingKey', 0) as string;
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options = this.getNodeParameter('options', 0, {});
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channel = await rabbitmqConnectExchange.call(this, exchange, type, options);
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const sendInputData = this.getNodeParameter('sendInputData', 0) as boolean;
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let message: string;
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const exchangePromises = [];
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for (let i = 0; i < items.length; i++) {
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if (sendInputData) {
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message = JSON.stringify(items[i].json);
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} else {
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message = this.getNodeParameter('message', i) as string;
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}
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let headers: IDataObject = {};
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if (
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options.headers &&
|
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((options.headers as IDataObject).header! as IDataObject[]).length
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) {
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const itemOptions = this.getNodeParameter('options', i, {});
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const additionalHeaders: IDataObject = {};
|
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((itemOptions.headers as IDataObject).header as IDataObject[]).forEach(
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(header: IDataObject) => {
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additionalHeaders[header.key as string] = header.value;
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},
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||
);
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headers = additionalHeaders;
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}
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exchangePromises.push(
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channel.publish(exchange, routingKey, Buffer.from(message), { headers }),
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);
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}
|
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// @ts-ignore
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const promisesResponses = await Promise.allSettled(exchangePromises);
|
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||
// @ts-ignore
|
||
promisesResponses.forEach((response: JsonObject) => {
|
||
if (response.status !== 'fulfilled') {
|
||
if (!this.continueOnFail()) {
|
||
throw new NodeApiError(this.getNode(), response);
|
||
} else {
|
||
// Return the actual reason as error
|
||
returnItems.push({
|
||
json: {
|
||
error: response.reason,
|
||
},
|
||
});
|
||
return;
|
||
}
|
||
}
|
||
|
||
returnItems.push({
|
||
json: {
|
||
success: response.value,
|
||
},
|
||
});
|
||
});
|
||
|
||
await channel.close();
|
||
await channel.connection.close();
|
||
} else {
|
||
throw new NodeOperationError(this.getNode(), `The operation "${mode}" is not known!`);
|
||
}
|
||
|
||
return [returnItems];
|
||
} catch (error) {
|
||
if (channel) {
|
||
await channel.close();
|
||
await channel.connection.close();
|
||
}
|
||
throw error;
|
||
}
|
||
}
|
||
}
|