mirror of
https://github.com/n8n-io/n8n.git
synced 2024-11-14 16:44:07 -08:00
447 lines
12 KiB
TypeScript
447 lines
12 KiB
TypeScript
import type { Readable } from 'stream';
|
|
import type {
|
|
IDataObject,
|
|
IExecuteFunctions,
|
|
IN8nHttpFullResponse,
|
|
IN8nHttpResponse,
|
|
INodeExecutionData,
|
|
INodeType,
|
|
INodeTypeDescription,
|
|
} from 'n8n-workflow';
|
|
import { jsonParse, BINARY_ENCODING, NodeOperationError } from 'n8n-workflow';
|
|
import set from 'lodash/set';
|
|
import jwt from 'jsonwebtoken';
|
|
import { formatPrivateKey, generatePairedItemData } from '../../utils/utilities';
|
|
|
|
export class RespondToWebhook implements INodeType {
|
|
description: INodeTypeDescription = {
|
|
displayName: 'Respond to Webhook',
|
|
icon: { light: 'file:webhook.svg', dark: 'file:webhook.dark.svg' },
|
|
name: 'respondToWebhook',
|
|
group: ['transform'],
|
|
version: [1, 1.1],
|
|
description: 'Returns data for Webhook',
|
|
defaults: {
|
|
name: 'Respond to Webhook',
|
|
},
|
|
inputs: ['main'],
|
|
outputs: ['main'],
|
|
credentials: [
|
|
{
|
|
name: 'jwtAuth',
|
|
required: true,
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['jwt'],
|
|
},
|
|
},
|
|
},
|
|
],
|
|
properties: [
|
|
{
|
|
displayName:
|
|
'Verify that the "Webhook" node\'s "Respond" parameter is set to "Using Respond to Webhook Node". <a href="https://docs.n8n.io/integrations/builtin/core-nodes/n8n-nodes-base.respondtowebhook/" target="_blank">More details',
|
|
name: 'generalNotice',
|
|
type: 'notice',
|
|
default: '',
|
|
},
|
|
{
|
|
displayName: 'Respond With',
|
|
name: 'respondWith',
|
|
type: 'options',
|
|
options: [
|
|
{
|
|
name: 'All Incoming Items',
|
|
value: 'allIncomingItems',
|
|
description: 'Respond with all input JSON items',
|
|
},
|
|
{
|
|
name: 'Binary File',
|
|
value: 'binary',
|
|
description: 'Respond with incoming file binary data',
|
|
},
|
|
{
|
|
name: 'First Incoming Item',
|
|
value: 'firstIncomingItem',
|
|
description: 'Respond with the first input JSON item',
|
|
},
|
|
{
|
|
name: 'JSON',
|
|
value: 'json',
|
|
description: 'Respond with a custom JSON body',
|
|
},
|
|
{
|
|
name: 'JWT Token',
|
|
value: 'jwt',
|
|
description: 'Respond with a JWT token',
|
|
},
|
|
{
|
|
name: 'No Data',
|
|
value: 'noData',
|
|
description: 'Respond with an empty body',
|
|
},
|
|
{
|
|
name: 'Redirect',
|
|
value: 'redirect',
|
|
description: 'Respond with a redirect to a given URL',
|
|
},
|
|
{
|
|
name: 'Text',
|
|
value: 'text',
|
|
description: 'Respond with a simple text message body',
|
|
},
|
|
],
|
|
default: 'firstIncomingItem',
|
|
description: 'The data that should be returned',
|
|
},
|
|
{
|
|
displayName: 'Credentials',
|
|
name: 'credentials',
|
|
type: 'credentials',
|
|
default: '',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['jwt'],
|
|
},
|
|
},
|
|
},
|
|
{
|
|
displayName:
|
|
'When using expressions, note that this node will only run for the first item in the input data',
|
|
name: 'webhookNotice',
|
|
type: 'notice',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['json', 'text', 'jwt'],
|
|
},
|
|
},
|
|
default: '',
|
|
},
|
|
{
|
|
displayName: 'Redirect URL',
|
|
name: 'redirectURL',
|
|
type: 'string',
|
|
required: true,
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['redirect'],
|
|
},
|
|
},
|
|
default: '',
|
|
placeholder: 'e.g. http://www.n8n.io',
|
|
description: 'The URL to redirect to',
|
|
validateType: 'url',
|
|
},
|
|
{
|
|
displayName: 'Response Body',
|
|
name: 'responseBody',
|
|
type: 'json',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['json'],
|
|
},
|
|
},
|
|
default: '{\n "myField": "value"\n}',
|
|
typeOptions: {
|
|
rows: 4,
|
|
},
|
|
description: 'The HTTP response JSON data',
|
|
},
|
|
{
|
|
displayName: 'Payload',
|
|
name: 'payload',
|
|
type: 'json',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['jwt'],
|
|
},
|
|
},
|
|
default: '{\n "myField": "value"\n}',
|
|
typeOptions: {
|
|
rows: 4,
|
|
},
|
|
validateType: 'object',
|
|
description: 'The payload to include in the JWT token',
|
|
},
|
|
{
|
|
displayName: 'Response Body',
|
|
name: 'responseBody',
|
|
type: 'string',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['text'],
|
|
},
|
|
},
|
|
typeOptions: {
|
|
rows: 2,
|
|
},
|
|
default: '',
|
|
placeholder: 'e.g. Workflow completed',
|
|
description: 'The HTTP response text data',
|
|
},
|
|
{
|
|
displayName: 'Response Data Source',
|
|
name: 'responseDataSource',
|
|
type: 'options',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['binary'],
|
|
},
|
|
},
|
|
options: [
|
|
{
|
|
name: 'Choose Automatically From Input',
|
|
value: 'automatically',
|
|
description: 'Use if input data will contain a single piece of binary data',
|
|
},
|
|
{
|
|
name: 'Specify Myself',
|
|
value: 'set',
|
|
description: 'Enter the name of the input field the binary data will be in',
|
|
},
|
|
],
|
|
default: 'automatically',
|
|
},
|
|
{
|
|
displayName: 'Input Field Name',
|
|
name: 'inputFieldName',
|
|
type: 'string',
|
|
required: true,
|
|
default: 'data',
|
|
displayOptions: {
|
|
show: {
|
|
respondWith: ['binary'],
|
|
responseDataSource: ['set'],
|
|
},
|
|
},
|
|
description: 'The name of the node input field with the binary data',
|
|
},
|
|
|
|
{
|
|
displayName: 'Options',
|
|
name: 'options',
|
|
type: 'collection',
|
|
placeholder: 'Add Option',
|
|
default: {},
|
|
options: [
|
|
{
|
|
displayName: 'Response Code',
|
|
name: 'responseCode',
|
|
type: 'number',
|
|
typeOptions: {
|
|
minValue: 100,
|
|
maxValue: 599,
|
|
},
|
|
default: 200,
|
|
description: 'The HTTP response code to return. Defaults to 200.',
|
|
},
|
|
{
|
|
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: 'Put Response in Field',
|
|
name: 'responseKey',
|
|
type: 'string',
|
|
displayOptions: {
|
|
show: {
|
|
['/respondWith']: ['allIncomingItems', 'firstIncomingItem'],
|
|
},
|
|
},
|
|
default: '',
|
|
description: 'The name of the response field to put all items in',
|
|
placeholder: 'e.g. data',
|
|
},
|
|
],
|
|
},
|
|
],
|
|
};
|
|
|
|
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
|
|
const items = this.getInputData();
|
|
const nodeVersion = this.getNode().typeVersion;
|
|
|
|
const WEBHOOK_NODE_TYPES = ['n8n-nodes-base.webhook', 'n8n-nodes-base.formTrigger'];
|
|
|
|
try {
|
|
if (nodeVersion >= 1.1) {
|
|
const connectedNodes = this.getParentNodes(this.getNode().name);
|
|
if (!connectedNodes.some(({ type }) => WEBHOOK_NODE_TYPES.includes(type))) {
|
|
throw new NodeOperationError(
|
|
this.getNode(),
|
|
new Error('No Webhook node found in the workflow'),
|
|
{
|
|
description:
|
|
'Insert a Webhook node to your workflow and set the “Respond” parameter to “Using Respond to Webhook Node” ',
|
|
},
|
|
);
|
|
}
|
|
}
|
|
|
|
const respondWith = this.getNodeParameter('respondWith', 0) as string;
|
|
const options = this.getNodeParameter('options', 0, {});
|
|
|
|
const headers = {} as IDataObject;
|
|
if (options.responseHeaders) {
|
|
for (const header of (options.responseHeaders as IDataObject).entries as IDataObject[]) {
|
|
if (typeof header.name !== 'string') {
|
|
header.name = header.name?.toString();
|
|
}
|
|
headers[header.name?.toLowerCase() as string] = header.value?.toString();
|
|
}
|
|
}
|
|
|
|
let statusCode = (options.responseCode as number) || 200;
|
|
let responseBody: IN8nHttpResponse | Readable;
|
|
if (respondWith === 'json') {
|
|
const responseBodyParameter = this.getNodeParameter('responseBody', 0) as string;
|
|
if (responseBodyParameter) {
|
|
if (typeof responseBodyParameter === 'object') {
|
|
responseBody = responseBodyParameter;
|
|
} else {
|
|
try {
|
|
responseBody = jsonParse(responseBodyParameter);
|
|
} catch (error) {
|
|
throw new NodeOperationError(this.getNode(), error as Error, {
|
|
message: "Invalid JSON in 'Response Body' field",
|
|
description:
|
|
"Check that the syntax of the JSON in the 'Response Body' parameter is valid",
|
|
});
|
|
}
|
|
}
|
|
}
|
|
} else if (respondWith === 'jwt') {
|
|
try {
|
|
const { keyType, secret, algorithm, privateKey } = (await this.getCredentials(
|
|
'jwtAuth',
|
|
)) as {
|
|
keyType: 'passphrase' | 'pemKey';
|
|
privateKey: string;
|
|
secret: string;
|
|
algorithm: jwt.Algorithm;
|
|
};
|
|
|
|
let secretOrPrivateKey;
|
|
|
|
if (keyType === 'passphrase') {
|
|
secretOrPrivateKey = secret;
|
|
} else {
|
|
secretOrPrivateKey = formatPrivateKey(privateKey);
|
|
}
|
|
const payload = this.getNodeParameter('payload', 0, {}) as IDataObject;
|
|
const token = jwt.sign(payload, secretOrPrivateKey, { algorithm });
|
|
responseBody = { token };
|
|
} catch (error) {
|
|
throw new NodeOperationError(this.getNode(), error as Error, {
|
|
message: 'Error signing JWT token',
|
|
});
|
|
}
|
|
} else if (respondWith === 'allIncomingItems') {
|
|
const respondItems = items.map((item) => item.json);
|
|
responseBody = options.responseKey
|
|
? set({}, options.responseKey as string, respondItems)
|
|
: respondItems;
|
|
} else if (respondWith === 'firstIncomingItem') {
|
|
responseBody = options.responseKey
|
|
? set({}, options.responseKey as string, items[0].json)
|
|
: items[0].json;
|
|
} else if (respondWith === 'text') {
|
|
responseBody = this.getNodeParameter('responseBody', 0) as string;
|
|
} else if (respondWith === 'binary') {
|
|
const item = items[0];
|
|
|
|
if (item.binary === undefined) {
|
|
throw new NodeOperationError(this.getNode(), 'No binary data exists on the first item!');
|
|
}
|
|
|
|
let responseBinaryPropertyName: string;
|
|
|
|
const responseDataSource = this.getNodeParameter('responseDataSource', 0) as string;
|
|
|
|
if (responseDataSource === 'set') {
|
|
responseBinaryPropertyName = this.getNodeParameter('inputFieldName', 0) as string;
|
|
} else {
|
|
const binaryKeys = Object.keys(item.binary);
|
|
if (binaryKeys.length === 0) {
|
|
throw new NodeOperationError(
|
|
this.getNode(),
|
|
'No binary data exists on the first item!',
|
|
);
|
|
}
|
|
responseBinaryPropertyName = binaryKeys[0];
|
|
}
|
|
|
|
const binaryData = this.helpers.assertBinaryData(0, responseBinaryPropertyName);
|
|
if (binaryData.id) {
|
|
responseBody = { binaryData };
|
|
} else {
|
|
responseBody = Buffer.from(binaryData.data, BINARY_ENCODING);
|
|
headers['content-length'] = (responseBody as Buffer).length;
|
|
}
|
|
|
|
if (!headers['content-type']) {
|
|
headers['content-type'] = binaryData.mimeType;
|
|
}
|
|
} else if (respondWith === 'redirect') {
|
|
headers.location = this.getNodeParameter('redirectURL', 0) as string;
|
|
statusCode = (options.responseCode as number) ?? 307;
|
|
} else if (respondWith !== 'noData') {
|
|
throw new NodeOperationError(
|
|
this.getNode(),
|
|
`The Response Data option "${respondWith}" is not supported!`,
|
|
);
|
|
}
|
|
|
|
const response: IN8nHttpFullResponse = {
|
|
body: responseBody,
|
|
headers,
|
|
statusCode,
|
|
};
|
|
|
|
this.sendResponse(response);
|
|
} catch (error) {
|
|
if (this.continueOnFail(error)) {
|
|
const itemData = generatePairedItemData(items.length);
|
|
const returnData = this.helpers.constructExecutionMetaData(
|
|
[{ json: { error: error.message } }],
|
|
{ itemData },
|
|
);
|
|
return [returnData];
|
|
}
|
|
|
|
throw error;
|
|
}
|
|
|
|
return [items];
|
|
}
|
|
}
|