n8n/packages/nodes-base/nodes/Aws/DynamoDB/GenericFunctions.ts

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import {
IExecuteFunctions,
IHookFunctions,
ILoadOptionsFunctions,
IWebhookFunctions,
} from 'n8n-core';
import { deepCopy, IDataObject, IHttpRequestOptions, INodeExecutionData } from 'n8n-workflow';
import { IRequestBody } from './types';
export async function awsApiRequest(
this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions,
service: string,
method: string,
path: string,
body?: object | IRequestBody,
headers?: object,
// tslint:disable-next-line:no-any
): Promise<any> {
const credentials = await this.getCredentials('aws');
const requestOptions = {
qs: {
service,
path,
},
method,
body: JSON.stringify(body),
url: '',
headers,
region: credentials?.region as string,
} as IHttpRequestOptions;
try {
return JSON.parse(
await this.helpers.requestWithAuthentication.call(this, 'aws', requestOptions),
);
} catch (error) {
const errorMessage =
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(error.response && error.response.body && error.response.body.message) ||
(error.response && error.response.body && error.response.body.Message) ||
error.message;
if (error.statusCode === 403) {
if (errorMessage === 'The security token included in the request is invalid.') {
throw new Error('The AWS credentials are not valid!');
} else if (
errorMessage.startsWith(
'The request signature we calculated does not match the signature you provided',
)
) {
throw new Error('The AWS credentials are not valid!');
}
}
throw new Error(`AWS error response [${error.statusCode}]: ${errorMessage}`);
}
}
export async function awsApiRequestAllItems(
this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions,
service: string,
method: string,
path: string,
body?: IRequestBody,
headers?: object,
// tslint:disable-next-line:no-any
): Promise<any> {
const returnData: IDataObject[] = [];
let responseData;
do {
responseData = await awsApiRequest.call(this, service, method, path, body, headers);
if (responseData.LastEvaluatedKey) {
body!.ExclusiveStartKey = responseData.LastEvaluatedKey;
}
returnData.push(...responseData.Items);
} while (responseData.LastEvaluatedKey !== undefined);
return returnData;
}
export function copyInputItem(item: INodeExecutionData, properties: string[]): IDataObject {
// Prepare the data to insert and copy it to be returned
let newItem: IDataObject;
newItem = {};
for (const property of properties) {
if (item.json[property] === undefined) {
newItem[property] = null;
} else {
newItem[property] = deepCopy(item.json[property]);
}
}
return newItem;
}