import { URL, } from 'url'; import { sign, } from 'aws4'; import { OptionsWithUri, } from 'request'; import { IExecuteFunctions, IHookFunctions, ILoadOptionsFunctions, IWebhookFunctions, } from 'n8n-core'; import { ICredentialDataDecryptedObject, IDataObject, NodeApiError, NodeOperationError, } from 'n8n-workflow'; import { get, } from 'lodash'; function getEndpointForService(service: string, credentials: ICredentialDataDecryptedObject): string { let endpoint; if (service === 'lambda' && credentials.lambdaEndpoint) { endpoint = credentials.lambdaEndpoint; } else if (service === 'sns' && credentials.snsEndpoint) { endpoint = credentials.snsEndpoint; } else { endpoint = `https://${service}.${credentials.region}.amazonaws.com`; } return (endpoint as string).replace('{region}', credentials.region as string); } export async function awsApiRequest(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions, service: string, method: string, path: string, body?: string, headers?: object): Promise { // tslint:disable-line:no-any const credentials = this.getCredentials('aws'); if (credentials === undefined) { throw new NodeOperationError(this.getNode(), 'No credentials got returned!'); } // Concatenate path and instantiate URL object so it parses correctly query strings const endpoint = new URL(getEndpointForService(service, credentials) + path); // Sign AWS API request with the user credentials const signOpts = { headers: headers || {}, host: endpoint.host, method, path, body }; sign(signOpts, { accessKeyId: `${credentials.accessKeyId}`.trim(), secretAccessKey: `${credentials.secretAccessKey}`.trim() }); const options: OptionsWithUri = { headers: signOpts.headers, method, uri: endpoint.href, body: signOpts.body, }; try { return await this.helpers.request!(options); } catch (error) { throw new NodeApiError(this.getNode(), error); // no XML parsing needed } } export async function awsApiRequestREST(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions, service: string, method: string, path: string, body?: string, headers?: object): Promise { // tslint:disable-line:no-any const response = await awsApiRequest.call(this, service, method, path, body, headers); try { return JSON.parse(response); } catch (error) { return response; } } export async function awsApiRequestRESTAllItems(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions, propertyName: string, service: string, method: string, path: string, body?: string, query: IDataObject = {}, headers: IDataObject = {}, option: IDataObject = {}, region?: string): Promise { // tslint:disable-line:no-any const returnData: IDataObject[] = []; let responseData; const propertyNameArray = propertyName.split('.'); do { responseData = await awsApiRequestREST.call(this, service, method, path, body, query); if (get(responseData, `${propertyNameArray[0]}.${propertyNameArray[1]}.NextToken`)) { query['NextToken'] = get(responseData, `${propertyNameArray[0]}.${propertyNameArray[1]}.NextToken`); } if (get(responseData, propertyName)) { if (Array.isArray(get(responseData, propertyName))) { returnData.push.apply(returnData, get(responseData, propertyName)); } else { returnData.push(get(responseData, propertyName)); } } } while ( get(responseData, `${propertyNameArray[0]}.${propertyNameArray[1]}.NextToken`) !== undefined ); return returnData; }