import { URL, } from 'url'; import { sign, } from 'aws4'; import { get, } from 'lodash'; import { OptionsWithUri, } from 'request'; import { parseString, } from 'xml2js'; import { IExecuteFunctions, IHookFunctions, ILoadOptionsFunctions, IWebhookFunctions, } from 'n8n-core'; import { IDataObject, } from 'n8n-workflow'; import { pascalCase, } from 'change-case'; export async function awsApiRequest(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions, service: string, method: string, path: string, body?: string | Buffer | IDataObject, query: IDataObject = {}, headers?: object, option: IDataObject = {}, region?: string): Promise { // tslint:disable-line:no-any const credentials = this.getCredentials('aws'); if (credentials === undefined) { throw new Error('No credentials got returned!'); } const endpoint = new URL(((credentials.rekognitionEndpoint as string || '').replace('{region}', credentials.region as string) || `https://${service}.${credentials.region}.amazonaws.com`) + 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, }; if (Object.keys(option).length !== 0) { Object.assign(options, option); } try { return await this.helpers.request!(options); } catch (error) { const errorMessage = (error.response && error.response.body.message) || (error.response && 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}]: ${errorMessage}`); } } export async function awsApiRequestREST(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions, service: string, method: string, path: string, body?: string, query: IDataObject = {}, headers?: object, options: IDataObject = {}, region?: string): Promise { // tslint:disable-line:no-any const response = await awsApiRequest.call(this, service, method, path, body, query, headers, options, region); try { return JSON.parse(response); } catch (e) { return response; } } export async function awsApiRequestSOAP(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions, service: string, method: string, path: string, body?: string | Buffer | IDataObject, query: IDataObject = {}, headers?: object, option: IDataObject = {}, region?: string): Promise { // tslint:disable-line:no-any const response = await awsApiRequest.call(this, service, method, path, body, query, headers, option, region); try { return await new Promise((resolve, reject) => { parseString(response, { explicitArray: false }, (err, data) => { if (err) { return reject(err); } resolve(data); }); }); } catch (e) { return e; } } export async function awsApiRequestSOAPAllItems(this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions, propertyName: string, service: string, method: string, path: string, body?: string, query: IDataObject = {}, headers: IDataObject = {}, option: IDataObject = {}, region?: string): Promise { // tslint:disable-line:no-any const returnData: IDataObject[] = []; let responseData; do { responseData = await awsApiRequestSOAP.call(this, service, method, path, body, query, headers, option, region); //https://forums.aws.amazon.com/thread.jspa?threadID=55746 if (get(responseData, `${propertyName.split('.')[0]}.NextContinuationToken`)) { query['continuation-token'] = get(responseData, `${propertyName.split('.')[0]}.NextContinuationToken`); } if (get(responseData, propertyName)) { if (Array.isArray(get(responseData, propertyName))) { returnData.push.apply(returnData, get(responseData, propertyName)); } else { returnData.push(get(responseData, propertyName)); } } if (query.limit && query.limit <= returnData.length) { return returnData; } } while ( get(responseData, `${propertyName.split('.')[0]}.IsTruncated`) !== undefined && get(responseData, `${propertyName.split('.')[0]}.IsTruncated`) !== 'false' ); return returnData; } function queryToString(params: IDataObject) { return Object.keys(params).map(key => key + '=' + params[key]).join('&'); } export function keysTPascalCase(object: IDataObject) { const data: IDataObject = {}; for (const key of Object.keys(object)) { data[pascalCase(key as string)] = object[key]; } return data; }