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

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import {
URL,
} from 'url';
import {
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Request,
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<any> { // tslint:disable-line:no-any
const credentials = await 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
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const signOpts = { headers: headers || {}, host: endpoint.host, method, path, body } as Request;
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<any> { // 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<any> { // 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;
}