n8n/packages/nodes-base/nodes/Aws/AwsLambda.node.ts
2022-07-14 22:05:11 +02:00

221 lines
5.2 KiB
TypeScript

import { IExecuteFunctions } from 'n8n-core';
import {
IDataObject,
ILoadOptionsFunctions,
INodeExecutionData,
INodePropertyOptions,
INodeType,
INodeTypeDescription,
JsonObject,
NodeApiError,
NodeOperationError,
} from 'n8n-workflow';
import { awsApiRequestREST } from './GenericFunctions';
export class AwsLambda implements INodeType {
description: INodeTypeDescription = {
displayName: 'AWS Lambda',
name: 'awsLambda',
icon: 'file:lambda.svg',
group: ['output'],
version: 1,
subtitle: '={{$parameter["function"]}}',
description: 'Invoke functions on AWS Lambda',
defaults: {
name: 'AWS Lambda',
},
inputs: ['main'],
outputs: ['main'],
credentials: [
{
name: 'aws',
required: true,
},
],
properties: [
{
displayName: 'Operation',
name: 'operation',
type: 'options',
noDataExpression: true,
options: [
{
name: 'Invoke',
value: 'invoke',
description: 'Invoke a function',
action: 'Invoke a function',
},
],
default: 'invoke',
},
{
displayName: 'Function Name or ID',
name: 'function',
type: 'options',
typeOptions: {
loadOptionsMethod: 'getFunctions',
},
displayOptions: {
show: {
operation: [
'invoke',
],
},
},
options: [],
default: '',
required: true,
description: 'The function you want to invoke. Choose from the list, or specify an ID using an <a href="https://docs.n8n.io/code-examples/expressions/">expression</a>.',
},
{
displayName: 'Qualifier',
name: 'qualifier',
type: 'string',
displayOptions: {
show: {
operation: [
'invoke',
],
},
},
required: true,
default: '$LATEST',
description: 'Specify a version or alias to invoke a published version of the function',
},
{
displayName: 'Invocation Type',
name: 'invocationType',
type: 'options',
options: [
{
name: 'Wait for Results',
value: 'RequestResponse',
description: 'Invoke the function synchronously and wait for the response',
},
{
name: 'Continue Workflow',
value: 'Event',
description: 'Invoke the function and immediately continue the workflow',
},
],
displayOptions: {
show: {
operation: [
'invoke',
],
},
},
default: 'RequestResponse',
description: 'Specify if the workflow should wait for the function to return the results',
},
{
displayName: 'JSON Input',
name: 'payload',
type: 'string',
displayOptions: {
show: {
operation: [
'invoke',
],
},
},
default: '',
description: 'The JSON that you want to provide to your Lambda function as input',
typeOptions: {
alwaysOpenEditWindow: true,
},
},
],
};
methods = {
loadOptions: {
async getFunctions(this: ILoadOptionsFunctions): Promise<INodePropertyOptions[]> {
const returnData: INodePropertyOptions[] = [];
const data = await awsApiRequestREST.call(this, 'lambda', 'GET', '/2015-03-31/functions/');
for (const func of data.Functions!) {
returnData.push({
name: func.FunctionName as string,
value: func.FunctionArn as string,
});
}
if (data.NextMarker) {
let marker: string = data.NextMarker;
while (true) {
const dataLoop = await awsApiRequestREST.call(this, 'lambda', 'GET', `/2015-03-31/functions/?MaxItems=50&Marker=${encodeURIComponent(marker)}`);
for (const func of dataLoop.Functions!) {
returnData.push({
name: func.FunctionName as string,
value: func.FunctionArn as string,
});
}
if (dataLoop.NextMarker) {
marker = dataLoop.NextMarker;
} else {
break;
}
}
}
return returnData;
},
},
};
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
const items = this.getInputData();
const returnData: IDataObject[] = [];
for (let i = 0; i < items.length; i++) {
try {
const params = {
FunctionName: this.getNodeParameter('function', i) as string,
InvocationType: this.getNodeParameter('invocationType', i) as string,
Payload: this.getNodeParameter('payload', i) as string,
Qualifier: this.getNodeParameter('qualifier', i) as string,
};
const responseData = await awsApiRequestREST.call(
this,
'lambda',
'POST',
`/2015-03-31/functions/${params.FunctionName}/invocations?Qualifier=${params.Qualifier}`,
params.Payload,
{
'X-Amz-Invocation-Type': params.InvocationType,
'Content-Type': 'application/x-amz-json-1.0',
},
);
if (responseData !== null && responseData?.errorMessage !== undefined) {
let errorMessage = responseData.errorMessage;
if (responseData.stackTrace) {
errorMessage += `\n\nStack trace:\n${responseData.stackTrace}`;
}
throw new NodeApiError(this.getNode(), responseData);
} else {
returnData.push({
result: responseData,
} as IDataObject);
}
} catch (error) {
if (this.continueOnFail()) {
returnData.push({ error: (error as JsonObject).message });
continue;
}
throw error;
}
}
return [this.helpers.returnJsonArray(returnData)];
}
}