mirror of
https://github.com/n8n-io/n8n.git
synced 2024-09-21 07:17:38 -07:00
491 lines
12 KiB
TypeScript
491 lines
12 KiB
TypeScript
import {
|
|
BINARY_ENCODING,
|
|
IWebhookFunctions,
|
|
} from 'n8n-core';
|
|
|
|
import {
|
|
IDataObject,
|
|
INodeExecutionData,
|
|
INodeTypeDescription,
|
|
INodeType,
|
|
IWebhookResponseData,
|
|
} from 'n8n-workflow';
|
|
|
|
import * as basicAuth from 'basic-auth';
|
|
|
|
import { Response } from 'express';
|
|
|
|
import * as fs from 'fs';
|
|
|
|
import * as formidable from 'formidable';
|
|
|
|
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="${realm}"` });
|
|
resp.end(message);
|
|
return {
|
|
noWebhookResponse: true,
|
|
};
|
|
}
|
|
|
|
export class Webhook implements INodeType {
|
|
description: INodeTypeDescription = {
|
|
displayName: 'Webhook',
|
|
name: 'webhook',
|
|
group: ['trigger'],
|
|
version: 1,
|
|
description: 'Starts the workflow when a webhook got called.',
|
|
defaults: {
|
|
name: 'Webhook',
|
|
color: '#885577',
|
|
},
|
|
inputs: [],
|
|
outputs: ['main'],
|
|
credentials: [
|
|
{
|
|
name: 'httpBasicAuth',
|
|
required: true,
|
|
displayOptions: {
|
|
show: {
|
|
authentication: [
|
|
'basicAuth',
|
|
],
|
|
},
|
|
},
|
|
},
|
|
{
|
|
name: 'httpHeaderAuth',
|
|
required: true,
|
|
displayOptions: {
|
|
show: {
|
|
authentication: [
|
|
'headerAuth',
|
|
],
|
|
},
|
|
},
|
|
},
|
|
],
|
|
webhooks: [
|
|
{
|
|
name: 'default',
|
|
httpMethod: '={{$parameter["httpMethod"]}}',
|
|
responseCode: '={{$parameter["responseCode"]}}',
|
|
responseMode: '={{$parameter["responseMode"]}}',
|
|
responseData: '={{$parameter["responseData"]}}',
|
|
responseBinaryPropertyName: '={{$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: 'GET',
|
|
value: 'GET',
|
|
},
|
|
{
|
|
name: 'POST',
|
|
value: 'POST',
|
|
},
|
|
],
|
|
default: 'GET',
|
|
description: 'The HTTP method to liste to.',
|
|
},
|
|
{
|
|
displayName: 'Path',
|
|
name: 'path',
|
|
type: 'string',
|
|
default: '',
|
|
placeholder: 'webhook',
|
|
required: true,
|
|
description: 'The path to listen to.',
|
|
},
|
|
{
|
|
displayName: 'Response Code',
|
|
name: 'responseCode',
|
|
type: 'number',
|
|
typeOptions: {
|
|
minValue: 100,
|
|
maxValue: 599,
|
|
},
|
|
default: 200,
|
|
description: 'The HTTP Response code to return',
|
|
},
|
|
{
|
|
displayName: 'Response Mode',
|
|
name: 'responseMode',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'On Received',
|
|
value: 'onReceived',
|
|
description: 'Returns directly with defined Response Code',
|
|
},
|
|
{
|
|
name: 'Last Node',
|
|
value: 'lastNode',
|
|
description: 'Returns data of the last executed node',
|
|
},
|
|
],
|
|
default: 'onReceived',
|
|
description: 'When and how to respond to the webhook.',
|
|
},
|
|
{
|
|
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.',
|
|
},
|
|
],
|
|
default: 'firstEntryJson',
|
|
description: 'What data should be returned. If it should return<br />all the itemsas 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': [
|
|
'POST',
|
|
],
|
|
},
|
|
},
|
|
default: false,
|
|
description: 'Set to true if 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 which to write the data of<br />
|
|
the received file. If the data gets received via "Form-Data Multipart"<br />
|
|
it will be the prefix and a number starting with 0 will be attached to it.`,
|
|
},
|
|
{
|
|
displayName: 'Response Content-Type',
|
|
name: 'responseContentType',
|
|
type: 'string',
|
|
displayOptions: {
|
|
show: {
|
|
'/responseData': [
|
|
'firstEntryJson',
|
|
],
|
|
'/responseMode': [
|
|
'lastNode',
|
|
],
|
|
},
|
|
},
|
|
default: '',
|
|
placeholder: 'application/xml',
|
|
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.',
|
|
},
|
|
{
|
|
displayName: 'Raw Body',
|
|
name: 'rawBody',
|
|
type: 'boolean',
|
|
displayOptions: {
|
|
hide: {
|
|
binaryData: [
|
|
true,
|
|
],
|
|
},
|
|
},
|
|
default: false,
|
|
description: 'Raw body (binary)',
|
|
},
|
|
],
|
|
},
|
|
],
|
|
};
|
|
|
|
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';
|
|
|
|
if (authentication === 'basicAuth') {
|
|
// Basic authorization is needed to call webhook
|
|
const httpBasicAuth = this.getCredentials('httpBasicAuth');
|
|
|
|
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
|
|
const httpHeaderAuth = this.getCredentials('httpHeaderAuth');
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
// @ts-ignore
|
|
const mimeType = headers['content-type'] || 'application/json';
|
|
if (mimeType.includes('multipart/form-data')) {
|
|
const form = new formidable.IncomingForm();
|
|
|
|
return new Promise((resolve, reject) => {
|
|
|
|
form.parse(req, async (err, data, files) => {
|
|
const returnItem: INodeExecutionData = {
|
|
binary: {},
|
|
json: {
|
|
body: data,
|
|
headers,
|
|
query: this.getQueryData(),
|
|
},
|
|
};
|
|
|
|
let count = 0;
|
|
for (const file of Object.keys(files)) {
|
|
|
|
let binaryPropertyName = file;
|
|
if (options.binaryPropertyName) {
|
|
binaryPropertyName = `${options.binaryPropertyName}${count}`;
|
|
}
|
|
|
|
const fileJson = files[file].toJSON() as IDataObject;
|
|
const fileContent = await fs.promises.readFile(files[file].path);
|
|
|
|
returnItem.binary![binaryPropertyName] = await this.helpers.prepareBinaryData(Buffer.from(fileContent), fileJson.name as string, fileJson.type as string);
|
|
|
|
count += 1;
|
|
}
|
|
resolve({
|
|
workflowData: [
|
|
[
|
|
returnItem,
|
|
]
|
|
],
|
|
});
|
|
});
|
|
|
|
});
|
|
}
|
|
|
|
if (options.binaryData === true) {
|
|
return new Promise((resolve, reject) => {
|
|
const binaryPropertyName = options.binaryPropertyName || 'data';
|
|
const data: Buffer[] = [];
|
|
|
|
req.on('data', (chunk) => {
|
|
data.push(chunk);
|
|
});
|
|
|
|
req.on('end', async () => {
|
|
const returnItem: INodeExecutionData = {
|
|
binary: {},
|
|
json: {
|
|
body: this.getBodyData(),
|
|
headers,
|
|
query: this.getQueryData(),
|
|
},
|
|
};
|
|
|
|
returnItem.binary![binaryPropertyName as string] = await this.helpers.prepareBinaryData(Buffer.concat(data));
|
|
|
|
return resolve({
|
|
workflowData: [
|
|
[
|
|
returnItem
|
|
]
|
|
],
|
|
});
|
|
});
|
|
|
|
req.on('error', (err) => {
|
|
throw new Error(err.message);
|
|
});
|
|
});
|
|
}
|
|
|
|
const response: INodeExecutionData = {
|
|
json: {
|
|
body: this.getBodyData(),
|
|
headers,
|
|
query: this.getQueryData(),
|
|
},
|
|
};
|
|
|
|
if (options.rawBody) {
|
|
response.binary = {
|
|
data: {
|
|
// @ts-ignore
|
|
data: req.rawBody.toString(BINARY_ENCODING),
|
|
mimeType,
|
|
}
|
|
};
|
|
}
|
|
|
|
return {
|
|
workflowData: [
|
|
[
|
|
response,
|
|
],
|
|
],
|
|
};
|
|
}
|
|
}
|