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AdvancedNodeApp

Advanced code for Nodejs applications using Express.
Author: Francis Rodrigues

Setup environment

Run npm install in the root of the project to install server dependencies
Change into the client directory and run npm install --legacy-peer-deps
Change back into the root of the project and run npm run dev to start the server
Access the application at localhost:3000 in your browser

Important: The credentials for the Mongo Atlas DB in dev.js are read only. If you attempt to log in without first adding your own connection string (covered later in the course) you will see an error: [0] MongoError: user is not allowed to do action [insert] on [advnode.users]

Implementing cache with Redis

app.get('/api/blogs', requireLogin, async (req, res) => {
  const redis = require('redis');
  const util = require('util');

  const redisUrl = 'redis://127.0.0.1:6379';
  const client = redis.createClient(redisUrl);

  // Wraps client.get into a Promise.
  client.get = util.promisify(client.get);

  // Do we have any cached data in Redis related to this query.
  const cachedBlogs = await client.get(req.user.id);

  // if yes, then respond to the request right away and return it.
  if (cachedBlogs) {
    console.log('SERVING FROM CACHE..');
    return res.send(JSON.parse(cachedBlogs));
  }

  // if no, we need to respond to request and update our cache
  // to store the data
  const blogs = await Blog.find({ _user: req.user.id });

  console.log('SERVING FROM MONGODB..');
  res.send(blogs);

  client.set(req.user.id, JSON.stringify(blogs));
});

Sources to learn more

Starting project for a course on Advanced Node - @Udemy

License

MIT

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advancednodeapp's Issues

Async callback was not invoked within the 30000ms timeout specified by jest.setTimeout

Integration tests ending with Jest timeout error.
Seems like that puppeteer is taking too long to validate the database connection.

Timeout - Async callback was not invoked within the 30000ms timeout specified by jest.setTimeout.Timeout - Async callback was not invoked within the 30000ms timeout specified by jest.setTimeout.Error:

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