mirror of
https://github.com/n8n-io/n8n.git
synced 2024-11-16 01:24:05 -08:00
607 lines
16 KiB
TypeScript
607 lines
16 KiB
TypeScript
import { BINARY_ENCODING, IWebhookFunctions } from 'n8n-core';
|
||
|
||
import {
|
||
ICredentialDataDecryptedObject,
|
||
IDataObject,
|
||
INodeExecutionData,
|
||
INodeType,
|
||
INodeTypeDescription,
|
||
IWebhookResponseData,
|
||
NodeOperationError,
|
||
} from 'n8n-workflow';
|
||
|
||
import fs from 'fs';
|
||
import stream from 'stream';
|
||
import { promisify } from 'util';
|
||
import basicAuth from 'basic-auth';
|
||
import type { Response } from 'express';
|
||
import formidable from 'formidable';
|
||
import isbot from 'isbot';
|
||
import { file as tmpFile } from 'tmp-promise';
|
||
|
||
const pipeline = promisify(stream.pipeline);
|
||
|
||
function authorizationError(resp: Response, realm: string, responseCode: number, message?: string) {
|
||
if (message === undefined) {
|
||
message = 'Authorization problem!';
|
||
if (responseCode === 401) {
|
||
message = 'Authorization is required!';
|
||
} else if (responseCode === 403) {
|
||
message = 'Authorization data is wrong!';
|
||
}
|
||
}
|
||
|
||
resp.writeHead(responseCode, { 'WWW-Authenticate': `Basic realm="${realm}"` });
|
||
resp.end(message);
|
||
return {
|
||
noWebhookResponse: true,
|
||
};
|
||
}
|
||
|
||
export class Webhook implements INodeType {
|
||
description: INodeTypeDescription = {
|
||
displayName: 'Webhook',
|
||
icon: 'file:webhook.svg',
|
||
name: 'webhook',
|
||
group: ['trigger'],
|
||
version: 1,
|
||
description: 'Starts the workflow when a webhook is called',
|
||
eventTriggerDescription: 'Waiting for you to call the Test URL',
|
||
activationMessage: 'You can now make calls to your production webhook URL.',
|
||
defaults: {
|
||
name: 'Webhook',
|
||
},
|
||
triggerPanel: {
|
||
header: '',
|
||
executionsHelp: {
|
||
inactive:
|
||
'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.',
|
||
active:
|
||
'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.',
|
||
},
|
||
activationHint:
|
||
'Once you’ve finished building your workflow, run it without having to click this button by using the production webhook URL.',
|
||
},
|
||
// eslint-disable-next-line n8n-nodes-base/node-class-description-inputs-wrong-regular-node
|
||
inputs: [],
|
||
outputs: ['main'],
|
||
credentials: [
|
||
{
|
||
name: 'httpBasicAuth',
|
||
required: true,
|
||
displayOptions: {
|
||
show: {
|
||
authentication: ['basicAuth'],
|
||
},
|
||
},
|
||
},
|
||
{
|
||
name: 'httpHeaderAuth',
|
||
required: true,
|
||
displayOptions: {
|
||
show: {
|
||
authentication: ['headerAuth'],
|
||
},
|
||
},
|
||
},
|
||
],
|
||
webhooks: [
|
||
{
|
||
name: 'default',
|
||
httpMethod: '={{$parameter["httpMethod"]}}',
|
||
isFullPath: true,
|
||
responseCode: '={{$parameter["responseCode"]}}',
|
||
responseMode: '={{$parameter["responseMode"]}}',
|
||
responseData:
|
||
'={{$parameter["responseData"] || ($parameter.options.noResponseBody ? "noData" : undefined) }}',
|
||
responseBinaryPropertyName: '={{$parameter["responseBinaryPropertyName"]}}',
|
||
responseContentType: '={{$parameter["options"]["responseContentType"]}}',
|
||
responsePropertyName: '={{$parameter["options"]["responsePropertyName"]}}',
|
||
responseHeaders: '={{$parameter["options"]["responseHeaders"]}}',
|
||
path: '={{$parameter["path"]}}',
|
||
},
|
||
],
|
||
properties: [
|
||
{
|
||
displayName: 'Authentication',
|
||
name: 'authentication',
|
||
type: 'options',
|
||
options: [
|
||
{
|
||
name: 'Basic Auth',
|
||
value: 'basicAuth',
|
||
},
|
||
{
|
||
name: 'Header Auth',
|
||
value: 'headerAuth',
|
||
},
|
||
{
|
||
name: 'None',
|
||
value: 'none',
|
||
},
|
||
],
|
||
default: 'none',
|
||
description: 'The way to authenticate',
|
||
},
|
||
{
|
||
displayName: 'HTTP Method',
|
||
name: 'httpMethod',
|
||
type: 'options',
|
||
options: [
|
||
{
|
||
name: 'DELETE',
|
||
value: 'DELETE',
|
||
},
|
||
{
|
||
name: 'GET',
|
||
value: 'GET',
|
||
},
|
||
{
|
||
name: 'HEAD',
|
||
value: 'HEAD',
|
||
},
|
||
{
|
||
name: 'PATCH',
|
||
value: 'PATCH',
|
||
},
|
||
{
|
||
name: 'POST',
|
||
value: 'POST',
|
||
},
|
||
{
|
||
name: 'PUT',
|
||
value: 'PUT',
|
||
},
|
||
],
|
||
default: 'GET',
|
||
description: 'The HTTP method to listen to',
|
||
},
|
||
{
|
||
displayName: 'Path',
|
||
name: 'path',
|
||
type: 'string',
|
||
default: '',
|
||
placeholder: 'webhook',
|
||
required: true,
|
||
description: 'The path to listen to',
|
||
},
|
||
{
|
||
displayName: 'Respond',
|
||
name: 'responseMode',
|
||
type: 'options',
|
||
options: [
|
||
{
|
||
name: 'Immediately',
|
||
value: 'onReceived',
|
||
description: 'As soon as this node executes',
|
||
},
|
||
{
|
||
name: 'When Last Node Finishes',
|
||
value: 'lastNode',
|
||
description: 'Returns data of the last-executed node',
|
||
},
|
||
{
|
||
name: "Using 'Respond to Webhook' Node",
|
||
value: 'responseNode',
|
||
description: 'Response defined in that node',
|
||
},
|
||
],
|
||
default: 'onReceived',
|
||
description: 'When and how to respond to the webhook',
|
||
},
|
||
{
|
||
displayName:
|
||
'Insert a \'Respond to Webhook\' node to control when and how you respond. <a href="https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.respondtowebhook/" target="_blank">More details</a>',
|
||
name: 'webhookNotice',
|
||
type: 'notice',
|
||
displayOptions: {
|
||
show: {
|
||
responseMode: ['responseNode'],
|
||
},
|
||
},
|
||
default: '',
|
||
},
|
||
{
|
||
displayName: 'Response Code',
|
||
name: 'responseCode',
|
||
type: 'number',
|
||
displayOptions: {
|
||
hide: {
|
||
responseMode: ['responseNode'],
|
||
},
|
||
},
|
||
typeOptions: {
|
||
minValue: 100,
|
||
maxValue: 599,
|
||
},
|
||
default: 200,
|
||
description: 'The HTTP Response code to return',
|
||
},
|
||
{
|
||
displayName: 'Response Data',
|
||
name: 'responseData',
|
||
type: 'options',
|
||
displayOptions: {
|
||
show: {
|
||
responseMode: ['lastNode'],
|
||
},
|
||
},
|
||
options: [
|
||
{
|
||
name: 'All Entries',
|
||
value: 'allEntries',
|
||
description: 'Returns all the entries of the last node. Always returns an array.',
|
||
},
|
||
{
|
||
name: 'First Entry JSON',
|
||
value: 'firstEntryJson',
|
||
description:
|
||
'Returns the JSON data of the first entry of the last node. Always returns a JSON object.',
|
||
},
|
||
{
|
||
name: 'First Entry Binary',
|
||
value: 'firstEntryBinary',
|
||
description:
|
||
'Returns the binary data of the first entry of the last node. Always returns a binary file.',
|
||
},
|
||
{
|
||
name: 'No Response Body',
|
||
value: 'noData',
|
||
description: 'Returns without a body',
|
||
},
|
||
],
|
||
default: 'firstEntryJson',
|
||
description:
|
||
'What data should be returned. If it should return all items as an array or only the first item as object.',
|
||
},
|
||
{
|
||
displayName: 'Property Name',
|
||
name: 'responseBinaryPropertyName',
|
||
type: 'string',
|
||
required: true,
|
||
default: 'data',
|
||
displayOptions: {
|
||
show: {
|
||
responseData: ['firstEntryBinary'],
|
||
},
|
||
},
|
||
description: 'Name of the binary property to return',
|
||
},
|
||
{
|
||
displayName: 'Options',
|
||
name: 'options',
|
||
type: 'collection',
|
||
placeholder: 'Add Option',
|
||
default: {},
|
||
options: [
|
||
{
|
||
displayName: 'Binary Data',
|
||
name: 'binaryData',
|
||
type: 'boolean',
|
||
displayOptions: {
|
||
show: {
|
||
'/httpMethod': ['PATCH', 'PUT', 'POST'],
|
||
},
|
||
},
|
||
default: false,
|
||
description: 'Whether the webhook will receive binary data',
|
||
},
|
||
{
|
||
displayName: 'Binary Property',
|
||
name: 'binaryPropertyName',
|
||
type: 'string',
|
||
default: 'data',
|
||
required: true,
|
||
displayOptions: {
|
||
show: {
|
||
binaryData: [true],
|
||
},
|
||
},
|
||
description:
|
||
'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.',
|
||
},
|
||
{
|
||
displayName: 'Ignore Bots',
|
||
name: 'ignoreBots',
|
||
type: 'boolean',
|
||
default: false,
|
||
description:
|
||
'Whether to ignore requests from bots like link previewers and web crawlers',
|
||
},
|
||
{
|
||
displayName: 'No Response Body',
|
||
name: 'noResponseBody',
|
||
type: 'boolean',
|
||
default: false,
|
||
description: 'Whether to send any body in the response',
|
||
displayOptions: {
|
||
hide: {
|
||
rawBody: [true],
|
||
},
|
||
show: {
|
||
'/responseMode': ['onReceived'],
|
||
},
|
||
},
|
||
},
|
||
{
|
||
displayName: 'Raw Body',
|
||
name: 'rawBody',
|
||
type: 'boolean',
|
||
displayOptions: {
|
||
hide: {
|
||
binaryData: [true],
|
||
noResponseBody: [true],
|
||
},
|
||
},
|
||
default: false,
|
||
// eslint-disable-next-line n8n-nodes-base/node-param-description-boolean-without-whether
|
||
description: 'Raw body (binary)',
|
||
},
|
||
{
|
||
displayName: 'Response Data',
|
||
name: 'responseData',
|
||
type: 'string',
|
||
displayOptions: {
|
||
show: {
|
||
'/responseMode': ['onReceived'],
|
||
},
|
||
hide: {
|
||
noResponseBody: [true],
|
||
},
|
||
},
|
||
default: '',
|
||
placeholder: 'success',
|
||
description: 'Custom response data to send',
|
||
},
|
||
{
|
||
displayName: 'Response Content-Type',
|
||
name: 'responseContentType',
|
||
type: 'string',
|
||
displayOptions: {
|
||
show: {
|
||
'/responseData': ['firstEntryJson'],
|
||
'/responseMode': ['lastNode'],
|
||
},
|
||
},
|
||
default: '',
|
||
placeholder: 'application/xml',
|
||
// eslint-disable-next-line n8n-nodes-base/node-param-description-miscased-json
|
||
description:
|
||
'Set a custom content-type to return if another one as the "application/json" should be returned',
|
||
},
|
||
{
|
||
displayName: 'Response Headers',
|
||
name: 'responseHeaders',
|
||
placeholder: 'Add Response Header',
|
||
description: 'Add headers to the webhook response',
|
||
type: 'fixedCollection',
|
||
typeOptions: {
|
||
multipleValues: true,
|
||
},
|
||
default: {},
|
||
options: [
|
||
{
|
||
name: 'entries',
|
||
displayName: 'Entries',
|
||
values: [
|
||
{
|
||
displayName: 'Name',
|
||
name: 'name',
|
||
type: 'string',
|
||
default: '',
|
||
description: 'Name of the header',
|
||
},
|
||
{
|
||
displayName: 'Value',
|
||
name: 'value',
|
||
type: 'string',
|
||
default: '',
|
||
description: 'Value of the header',
|
||
},
|
||
],
|
||
},
|
||
],
|
||
},
|
||
{
|
||
displayName: 'Property Name',
|
||
name: 'responsePropertyName',
|
||
type: 'string',
|
||
displayOptions: {
|
||
show: {
|
||
'/responseData': ['firstEntryJson'],
|
||
'/responseMode': ['lastNode'],
|
||
},
|
||
},
|
||
default: 'data',
|
||
description: 'Name of the property to return the data of instead of the whole JSON',
|
||
},
|
||
],
|
||
},
|
||
],
|
||
};
|
||
|
||
async webhook(this: IWebhookFunctions): Promise<IWebhookResponseData> {
|
||
const authentication = this.getNodeParameter('authentication') as string;
|
||
const options = this.getNodeParameter('options', {}) as IDataObject;
|
||
const req = this.getRequestObject();
|
||
const resp = this.getResponseObject();
|
||
const headers = this.getHeaderData();
|
||
const realm = 'Webhook';
|
||
|
||
const ignoreBots = options.ignoreBots as boolean;
|
||
if (ignoreBots && isbot((headers as IDataObject)['user-agent'] as string)) {
|
||
return authorizationError(resp, realm, 403);
|
||
}
|
||
|
||
if (authentication === 'basicAuth') {
|
||
// Basic authorization is needed to call webhook
|
||
let httpBasicAuth: ICredentialDataDecryptedObject | undefined;
|
||
try {
|
||
httpBasicAuth = await this.getCredentials('httpBasicAuth');
|
||
} catch (error) {
|
||
// Do nothing
|
||
}
|
||
|
||
if (httpBasicAuth === undefined || !httpBasicAuth.user || !httpBasicAuth.password) {
|
||
// Data is not defined on node so can not authenticate
|
||
return authorizationError(resp, realm, 500, 'No authentication data defined on node!');
|
||
}
|
||
|
||
const basicAuthData = basicAuth(req);
|
||
|
||
if (basicAuthData === undefined) {
|
||
// Authorization data is missing
|
||
return authorizationError(resp, realm, 401);
|
||
}
|
||
|
||
if (
|
||
basicAuthData.name !== httpBasicAuth!.user ||
|
||
basicAuthData.pass !== httpBasicAuth!.password
|
||
) {
|
||
// Provided authentication data is wrong
|
||
return authorizationError(resp, realm, 403);
|
||
}
|
||
} else if (authentication === 'headerAuth') {
|
||
// Special header with value is needed to call webhook
|
||
let httpHeaderAuth: ICredentialDataDecryptedObject | undefined;
|
||
try {
|
||
httpHeaderAuth = await this.getCredentials('httpHeaderAuth');
|
||
} catch (error) {
|
||
// Do nothing
|
||
}
|
||
|
||
if (httpHeaderAuth === undefined || !httpHeaderAuth.name || !httpHeaderAuth.value) {
|
||
// Data is not defined on node so can not authenticate
|
||
return authorizationError(resp, realm, 500, 'No authentication data defined on node!');
|
||
}
|
||
const headerName = (httpHeaderAuth.name as string).toLowerCase();
|
||
const headerValue = httpHeaderAuth.value as string;
|
||
|
||
if (
|
||
!headers.hasOwnProperty(headerName) ||
|
||
(headers as IDataObject)[headerName] !== headerValue
|
||
) {
|
||
// Provided authentication data is wrong
|
||
return authorizationError(resp, realm, 403);
|
||
}
|
||
}
|
||
|
||
const mimeType = headers['content-type'] ?? 'application/json';
|
||
if (mimeType.includes('multipart/form-data')) {
|
||
const form = new formidable.IncomingForm({ multiples: true });
|
||
|
||
return new Promise((resolve, _reject) => {
|
||
form.parse(req, async (err, data, files) => {
|
||
const returnItem: INodeExecutionData = {
|
||
binary: {},
|
||
json: {
|
||
headers,
|
||
params: this.getParamsData(),
|
||
query: this.getQueryData(),
|
||
body: data,
|
||
},
|
||
};
|
||
|
||
let count = 0;
|
||
for (const xfile of Object.keys(files)) {
|
||
const processFiles: formidable.File[] = [];
|
||
let multiFile = false;
|
||
if (Array.isArray(files[xfile])) {
|
||
processFiles.push(...(files[xfile] as formidable.File[]));
|
||
multiFile = true;
|
||
} else {
|
||
processFiles.push(files[xfile] as formidable.File);
|
||
}
|
||
|
||
let fileCount = 0;
|
||
for (const file of processFiles) {
|
||
let binaryPropertyName = xfile;
|
||
if (binaryPropertyName.endsWith('[]')) {
|
||
binaryPropertyName = binaryPropertyName.slice(0, -2);
|
||
}
|
||
if (multiFile === true) {
|
||
binaryPropertyName += fileCount++;
|
||
}
|
||
if (options.binaryPropertyName) {
|
||
binaryPropertyName = `${options.binaryPropertyName}${count}`;
|
||
}
|
||
|
||
const fileJson = file.toJSON();
|
||
returnItem.binary![binaryPropertyName] = await this.helpers.copyBinaryFile(
|
||
file.path,
|
||
fileJson.name || fileJson.filename,
|
||
fileJson.type as string,
|
||
);
|
||
|
||
count += 1;
|
||
}
|
||
}
|
||
resolve({
|
||
workflowData: [[returnItem]],
|
||
});
|
||
});
|
||
});
|
||
}
|
||
|
||
if (options.binaryData === true) {
|
||
const binaryFile = await tmpFile({ prefix: 'n8n-webhook-' });
|
||
|
||
try {
|
||
await pipeline(req, fs.createWriteStream(binaryFile.path));
|
||
|
||
const returnItem: INodeExecutionData = {
|
||
binary: {},
|
||
json: {
|
||
headers,
|
||
params: this.getParamsData(),
|
||
query: this.getQueryData(),
|
||
body: this.getBodyData(),
|
||
},
|
||
};
|
||
|
||
const binaryPropertyName = (options.binaryPropertyName || 'data') as string;
|
||
returnItem.binary![binaryPropertyName] = await this.helpers.copyBinaryFile(
|
||
binaryFile.path,
|
||
mimeType,
|
||
);
|
||
|
||
return {
|
||
workflowData: [[returnItem]],
|
||
};
|
||
} catch (error) {
|
||
throw new NodeOperationError(this.getNode(), error);
|
||
} finally {
|
||
await binaryFile.cleanup();
|
||
}
|
||
}
|
||
|
||
const response: INodeExecutionData = {
|
||
json: {
|
||
headers,
|
||
params: this.getParamsData(),
|
||
query: this.getQueryData(),
|
||
body: this.getBodyData(),
|
||
},
|
||
};
|
||
|
||
if (options.rawBody) {
|
||
response.binary = {
|
||
data: {
|
||
data: req.rawBody.toString(BINARY_ENCODING),
|
||
mimeType,
|
||
},
|
||
};
|
||
}
|
||
|
||
let webhookResponse: string | undefined;
|
||
if (options.responseData) {
|
||
webhookResponse = options.responseData as string;
|
||
}
|
||
|
||
return {
|
||
webhookResponse,
|
||
workflowData: [[response]],
|
||
};
|
||
}
|
||
}
|