mirror of
https://github.com/n8n-io/n8n.git
synced 2024-11-10 22:54:05 -08:00
614 lines
16 KiB
TypeScript
614 lines
16 KiB
TypeScript
import { BINARY_ENCODING, IWebhookFunctions } from 'n8n-core';
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import {
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ICredentialDataDecryptedObject,
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IDataObject,
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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IWebhookResponseData,
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NodeOperationError,
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} from 'n8n-workflow';
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import basicAuth from 'basic-auth';
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import { Response } from 'express';
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import fs from 'fs';
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import formidable from 'formidable';
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import isbot from 'isbot';
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function authorizationError(resp: Response, realm: string, responseCode: number, message?: string) {
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if (message === undefined) {
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message = 'Authorization problem!';
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if (responseCode === 401) {
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message = 'Authorization is required!';
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} else if (responseCode === 403) {
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message = 'Authorization data is wrong!';
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}
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}
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resp.writeHead(responseCode, { 'WWW-Authenticate': `Basic realm="${realm}"` });
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resp.end(message);
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return {
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noWebhookResponse: true,
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};
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}
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export class Webhook implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'Webhook',
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icon: 'file:webhook.svg',
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name: 'webhook',
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group: ['trigger'],
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version: 1,
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description: 'Starts the workflow when a webhook is called',
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eventTriggerDescription: 'Waiting for you to call the Test URL',
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activationMessage: 'You can now make calls to your production webhook URL.',
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defaults: {
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name: 'Webhook',
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},
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triggerPanel: {
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header: '',
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executionsHelp: {
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inactive:
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'Webhooks have two modes: test and production. <br /> <br /> <b>Use test mode while you build your workflow</b>. Click the \'listen\' button, then make a request to the test URL. The executions will show up in the editor.<br /> <br /> <b>Use production mode to run your workflow automatically</b>. <a data-key="activate">Activate</a> the workflow, then make requests to the production URL. These executions will show up in the executions list, but not in the editor.',
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active:
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'Webhooks have two modes: test and production. <br /> <br /> <b>Use test mode while you build your workflow</b>. Click the \'listen\' button, then make a request to the test URL. The executions will show up in the editor.<br /> <br /> <b>Use production mode to run your workflow automatically</b>. Since the workflow is activated, you can make requests to the production URL. These executions will show up in the <a data-key="executions">executions list</a>, but not in the editor.',
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},
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activationHint:
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'Once you’ve finished building your workflow, run it without having to click this button by using the production webhook URL.',
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},
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// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
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inputs: [],
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outputs: ['main'],
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credentials: [
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{
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name: 'httpBasicAuth',
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required: true,
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displayOptions: {
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show: {
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authentication: ['basicAuth'],
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},
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},
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},
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{
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name: 'httpHeaderAuth',
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required: true,
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displayOptions: {
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show: {
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authentication: ['headerAuth'],
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},
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},
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},
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],
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webhooks: [
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{
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name: 'default',
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httpMethod: '={{$parameter["httpMethod"]}}',
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isFullPath: true,
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responseCode: '={{$parameter["responseCode"]}}',
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responseMode: '={{$parameter["responseMode"]}}',
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responseData:
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'={{$parameter["responseData"] || ($parameter.options.noResponseBody ? "noData" : undefined) }}',
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responseBinaryPropertyName: '={{$parameter["responseBinaryPropertyName"]}}',
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responseContentType: '={{$parameter["options"]["responseContentType"]}}',
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responsePropertyName: '={{$parameter["options"]["responsePropertyName"]}}',
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responseHeaders: '={{$parameter["options"]["responseHeaders"]}}',
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path: '={{$parameter["path"]}}',
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},
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],
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properties: [
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{
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displayName: 'Authentication',
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name: 'authentication',
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type: 'options',
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options: [
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{
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name: 'Basic Auth',
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value: 'basicAuth',
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},
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{
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name: 'Header Auth',
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value: 'headerAuth',
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},
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{
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name: 'None',
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value: 'none',
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},
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],
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default: 'none',
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description: 'The way to authenticate',
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},
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{
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displayName: 'HTTP Method',
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name: 'httpMethod',
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type: 'options',
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options: [
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{
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name: 'DELETE',
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value: 'DELETE',
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},
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{
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name: 'GET',
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value: 'GET',
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},
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{
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name: 'HEAD',
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value: 'HEAD',
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},
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{
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name: 'PATCH',
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value: 'PATCH',
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},
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{
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name: 'POST',
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value: 'POST',
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},
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{
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name: 'PUT',
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value: 'PUT',
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},
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],
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default: 'GET',
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description: 'The HTTP method to listen to',
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},
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{
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displayName: 'Path',
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name: 'path',
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type: 'string',
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default: '',
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placeholder: 'webhook',
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required: true,
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description: 'The path to listen to',
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},
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{
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displayName: 'Respond',
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name: 'responseMode',
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type: 'options',
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options: [
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{
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name: 'Immediately',
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value: 'onReceived',
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description: 'As soon as this node executes',
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},
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{
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name: 'When Last Node Finishes',
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value: 'lastNode',
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description: 'Returns data of the last-executed node',
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},
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{
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name: "Using 'Respond to Webhook' Node",
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value: 'responseNode',
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description: 'Response defined in that node',
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},
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],
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default: 'onReceived',
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description: 'When and how to respond to the webhook',
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},
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{
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displayName:
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'Insert a \'Respond to Webhook\' node to control when and how you respond. <a href="https://docs.n8n.io/nodes/n8n-nodes-base.respondToWebhook" target="_blank">More details</a>',
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name: 'webhookNotice',
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type: 'notice',
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displayOptions: {
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show: {
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responseMode: ['responseNode'],
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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: 'Response Code',
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name: 'responseCode',
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type: 'number',
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displayOptions: {
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hide: {
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responseMode: ['responseNode'],
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},
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},
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typeOptions: {
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minValue: 100,
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maxValue: 599,
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},
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default: 200,
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description: 'The HTTP Response code to return',
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},
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{
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displayName: 'Response Data',
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name: 'responseData',
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type: 'options',
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displayOptions: {
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show: {
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responseMode: ['lastNode'],
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},
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},
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options: [
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{
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name: 'All Entries',
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value: 'allEntries',
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description: 'Returns all the entries of the last node. Always returns an array.',
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},
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{
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name: 'First Entry JSON',
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value: 'firstEntryJson',
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description:
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'Returns the JSON data of the first entry of the last node. Always returns a JSON object.',
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},
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{
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name: 'First Entry Binary',
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value: 'firstEntryBinary',
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description:
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'Returns the binary data of the first entry of the last node. Always returns a binary file.',
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},
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{
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name: 'No Response Body',
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value: 'noData',
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description: 'Returns without a body',
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},
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],
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default: 'firstEntryJson',
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description:
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'What data should be returned. If it should return all items as an array or only the first item as object.',
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},
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{
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displayName: 'Property Name',
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name: 'responseBinaryPropertyName',
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type: 'string',
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required: true,
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default: 'data',
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displayOptions: {
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show: {
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responseData: ['firstEntryBinary'],
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},
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},
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description: 'Name of the binary property to return',
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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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placeholder: 'Add Option',
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default: {},
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options: [
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{
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displayName: 'Binary Data',
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name: 'binaryData',
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type: 'boolean',
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displayOptions: {
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show: {
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'/httpMethod': ['PATCH', 'PUT', 'POST'],
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},
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},
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default: false,
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description: 'Whether the webhook will receive binary data',
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},
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{
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displayName: 'Binary Property',
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name: 'binaryPropertyName',
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type: 'string',
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default: 'data',
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required: true,
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displayOptions: {
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show: {
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binaryData: [true],
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},
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},
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description:
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'Name of the binary property to write the data of the received file to. If the data gets received via "Form-Data Multipart" it will be the prefix and a number starting with 0 will be attached to it.',
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},
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{
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displayName: 'Ignore Bots',
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name: 'ignoreBots',
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type: 'boolean',
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default: false,
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description:
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'Whether to ignore requests from bots like link previewers and web crawlers',
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},
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{
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displayName: 'No Response Body',
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name: 'noResponseBody',
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type: 'boolean',
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default: false,
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description: 'Whether to send any body in the response',
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displayOptions: {
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hide: {
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rawBody: [true],
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},
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show: {
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'/responseMode': ['onReceived'],
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},
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},
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},
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{
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displayName: 'Raw Body',
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name: 'rawBody',
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type: 'boolean',
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displayOptions: {
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hide: {
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binaryData: [true],
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noResponseBody: [true],
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},
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},
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default: false,
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// eslint-disable-next-line n8n-nodes-base/node-param-description-boolean-without-whether
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description: 'Raw body (binary)',
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},
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{
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displayName: 'Response Data',
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name: 'responseData',
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type: 'string',
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displayOptions: {
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show: {
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'/responseMode': ['onReceived'],
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},
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hide: {
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noResponseBody: [true],
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},
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},
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default: '',
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placeholder: 'success',
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description: 'Custom response data to send',
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},
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{
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displayName: 'Response Content-Type',
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name: 'responseContentType',
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type: 'string',
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displayOptions: {
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show: {
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'/responseData': ['firstEntryJson'],
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'/responseMode': ['lastNode'],
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},
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},
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default: '',
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placeholder: 'application/xml',
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// eslint-disable-next-line n8n-nodes-base/node-param-description-miscased-json
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description:
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'Set a custom content-type to return if another one as the "application/json" should be returned',
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},
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{
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displayName: 'Response Headers',
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name: 'responseHeaders',
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placeholder: 'Add Response Header',
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description: 'Add headers to the webhook response',
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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: 'entries',
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displayName: 'Entries',
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values: [
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{
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displayName: 'Name',
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name: 'name',
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type: 'string',
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default: '',
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description: 'Name of the header',
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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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description: 'Value of the header',
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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: 'Property Name',
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name: 'responsePropertyName',
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type: 'string',
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displayOptions: {
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show: {
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'/responseData': ['firstEntryJson'],
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'/responseMode': ['lastNode'],
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},
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},
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default: 'data',
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description: 'Name of the property to return the data of instead of the whole JSON',
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},
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],
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},
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],
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};
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async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
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const authentication = this.getNodeParameter('authentication') as string;
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const options = this.getNodeParameter('options', {}) as IDataObject;
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const req = this.getRequestObject();
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const resp = this.getResponseObject();
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const headers = this.getHeaderData();
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const realm = 'Webhook';
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const ignoreBots = options.ignoreBots as boolean;
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if (ignoreBots && isbot((headers as IDataObject)['user-agent'] as string)) {
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return authorizationError(resp, realm, 403);
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}
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if (authentication === 'basicAuth') {
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// Basic authorization is needed to call webhook
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let httpBasicAuth: ICredentialDataDecryptedObject | undefined;
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try {
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httpBasicAuth = await this.getCredentials('httpBasicAuth');
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} catch (error) {
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// Do nothing
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}
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if (httpBasicAuth === undefined || !httpBasicAuth.user || !httpBasicAuth.password) {
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// Data is not defined on node so can not authenticate
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return authorizationError(resp, realm, 500, 'No authentication data defined on node!');
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}
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const basicAuthData = basicAuth(req);
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if (basicAuthData === undefined) {
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// Authorization data is missing
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return authorizationError(resp, realm, 401);
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}
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if (
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basicAuthData.name !== httpBasicAuth!.user ||
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basicAuthData.pass !== httpBasicAuth!.password
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) {
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// Provided authentication data is wrong
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return authorizationError(resp, realm, 403);
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}
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} else if (authentication === 'headerAuth') {
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// Special header with value is needed to call webhook
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let httpHeaderAuth: ICredentialDataDecryptedObject | undefined;
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try {
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httpHeaderAuth = await this.getCredentials('httpHeaderAuth');
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} catch (error) {
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// Do nothing
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}
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if (httpHeaderAuth === undefined || !httpHeaderAuth.name || !httpHeaderAuth.value) {
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// Data is not defined on node so can not authenticate
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return authorizationError(resp, realm, 500, 'No authentication data defined on node!');
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}
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const headerName = (httpHeaderAuth.name as string).toLowerCase();
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const headerValue = httpHeaderAuth.value as string;
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if (
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!headers.hasOwnProperty(headerName) ||
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(headers as IDataObject)[headerName] !== headerValue
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) {
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// Provided authentication data is wrong
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return authorizationError(resp, realm, 403);
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}
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}
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// @ts-ignore
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const mimeType = headers['content-type'] || 'application/json';
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if (mimeType.includes('multipart/form-data')) {
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// @ts-ignore
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const form = new formidable.IncomingForm({ multiples: true });
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return new Promise((resolve, reject) => {
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form.parse(req, async (err, data, files) => {
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const returnItem: INodeExecutionData = {
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binary: {},
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json: {
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headers,
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params: this.getParamsData(),
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query: this.getQueryData(),
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body: data,
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},
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};
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let count = 0;
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for (const xfile of Object.keys(files)) {
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const processFiles: formidable.File[] = [];
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let multiFile = false;
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if (Array.isArray(files[xfile])) {
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processFiles.push(...(files[xfile] as formidable.File[]));
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multiFile = true;
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} else {
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processFiles.push(files[xfile] as formidable.File);
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}
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let fileCount = 0;
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for (const file of processFiles) {
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let binaryPropertyName = xfile;
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if (binaryPropertyName.endsWith('[]')) {
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binaryPropertyName = binaryPropertyName.slice(0, -2);
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}
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if (multiFile === true) {
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binaryPropertyName += fileCount++;
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}
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if (options.binaryPropertyName) {
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binaryPropertyName = `${options.binaryPropertyName}${count}`;
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}
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const fileJson = file.toJSON() as unknown as IDataObject;
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const fileContent = await fs.promises.readFile(file.path);
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returnItem.binary![binaryPropertyName] = await this.helpers.prepareBinaryData(
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Buffer.from(fileContent),
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fileJson.name as string,
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fileJson.type as string,
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);
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count += 1;
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}
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}
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resolve({
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workflowData: [[returnItem]],
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});
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});
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});
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}
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if (options.binaryData === true) {
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return new Promise((resolve, reject) => {
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const binaryPropertyName = options.binaryPropertyName || 'data';
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const data: Buffer[] = [];
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req.on('data', (chunk) => {
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data.push(chunk);
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});
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req.on('end', async () => {
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const returnItem: INodeExecutionData = {
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binary: {},
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json: {
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headers,
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params: this.getParamsData(),
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query: this.getQueryData(),
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body: this.getBodyData(),
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},
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};
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returnItem.binary![binaryPropertyName as string] = await this.helpers.prepareBinaryData(
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Buffer.concat(data),
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);
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return resolve({
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workflowData: [[returnItem]],
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});
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});
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req.on('error', (error) => {
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throw new NodeOperationError(this.getNode(), error);
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});
|
||
});
|
||
}
|
||
|
||
const response: INodeExecutionData = {
|
||
json: {
|
||
headers,
|
||
params: this.getParamsData(),
|
||
query: this.getQueryData(),
|
||
body: this.getBodyData(),
|
||
},
|
||
};
|
||
|
||
if (options.rawBody) {
|
||
response.binary = {
|
||
data: {
|
||
// @ts-ignore
|
||
data: req.rawBody.toString(BINARY_ENCODING),
|
||
mimeType,
|
||
},
|
||
};
|
||
}
|
||
|
||
let webhookResponse: string | undefined;
|
||
if (options.responseData) {
|
||
webhookResponse = options.responseData as string;
|
||
}
|
||
|
||
return {
|
||
webhookResponse,
|
||
workflowData: [[response]],
|
||
};
|
||
}
|
||
}
|