093221423e
* nodejs-launchdarkly * segregating code examples * refactoring the code sections * refactor directory name * minor changes * addressed review comments * review comments * review comments Co-authored-by: Arpendu Kumar Garai <Arpendu.KumarGarai@microfocus.com>
67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
import bodyParser from 'body-parser';
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import express from 'express';
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import cors from 'cors';
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import rateLimit from 'express-rate-limit';
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import LaunchDarkly from 'launchdarkly-node-server-sdk';
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import LdLogger from './ld_logger.js';
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// Initiating LaunchDarkly Client
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const LD_SDK_KEY = 'sdk-d2432dc7-e56a-458b-9f93-0361af47d578';
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const userName = 'admin';
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const launchDarklyClient = LaunchDarkly.init( LD_SDK_KEY );
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// Initiating the Logger
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const flagKey = 'backend-log-level';
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let logger;
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launchDarklyClient.once('ready', async () => {
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logger = new LdLogger( launchDarklyClient, flagKey, userName );
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serverInit();
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}
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);
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const serverInit = async () => {
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// Essential globals
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const app = express();
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// Initialize global application middlewares
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app.use(cors());
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app.use(
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bodyParser.urlencoded({
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extended: true
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})
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);
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app.use(
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bodyParser.json({
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type: 'application/json'
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})
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);
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// Initialize Rate Limit Midlleware
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const rateLimiterConfig = await launchDarklyClient.variation(
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'rate-limiter-config',
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{
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key: userName // The static "user" for this task.
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},
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{
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windowMs: 24 * 60 * 60 * 1000, // 24 hrs in milliseconds
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max: 100, // Limit each IP to 100 requests per `window`
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// (here, per 24 hours). Set it to 0 to disable rateLimiter
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message: 'You have exceeded 100 requests in 24 hrs limit!',
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standardHeaders: true, // Return rate limit info in the `RateLimit-*` headers
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legacyHeaders: false, // Disable the `X-RateLimit-*` headers
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} // Default/fall-back value
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);
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app.use(rateLimit(rateLimiterConfig));
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// Initialize API
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app.get('/hello', function (req, res) {
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return res.send('Hello World')
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});
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// Initialize server
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app.listen(5000, () => {
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logger.info('Starting server on port 5000');
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});
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};
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