Evan Genest's Learning Log

These are notes to myself. If you discover them and find them useful I would love to hear from you. Most of these are related to travel I did, books I read, or tech notes for Matomo and the LAMP stack.

Browse my topics here

Start a local Node API server and then test it


Make the API

  1. Make sure Mongo DB is installed and running:
    $ sudo systemctl status mongod
  2. Clone the server from makinhs/
  3. Install dependencies: npm install
  4. Start it: npm start

The server is now running on http://localhost:3600

Several ways to hit the server API with a POST

Using the console in a browser to POST

The console in Firefox or Safari can run JS that will send a post. console may complain "Be careful about pasting in code you find on Internet sites".

fetch('http://localhost:3600/users', {
        method: 'POST',
        headers: {
            "Content-type": "application/json"
        body: JSON.stringify({
            "firstName": "Marcos",
            "lastName": "Silva",
            "email": "marcos.henrique@toptal.com",
            "password": "s3cr3tp4sswo4rd"
    .then(function(response) {
        return response.json();
    .then(function(data) {
        console.log('Request succeeded with JSON response', data);
    .catch(function(error) {
        console.log('Request failed', error);

Using cURL at the CLI to POST

In the BASh terminal:

curl -d $'{"firstName":"Barry", "lastName":"Gordy", "email": "boss@motown.com", "password": "abc"}' -H "Content-Type: application/json" -X POST http://localhost:3600/users

Using the Insomnia GUI to POST

Download Insomnia API tester. Insomnia is a free application, similar to Postman. Start Insomnia. Once you are in a project, hit Ctl + n to start a new request. The center panel near the top has a one line slot is where you put the request, similar to a web browser's top slot. (You're in the right place if the slot has a SEND button on the right and a dropdown on the left for GET, PUT, et cetera).


  1. Ctl + n
  2. In the top slot type https://httpbin.org/get
  3. Select GET. Press Send
  4. The server's response data in JSON should appear in the right pane.


  1. Ctl + n
  2. In the top slot type: localhost:3600/users (no http://)
  3. Select POST
  4. Add data in the panel directly below the slot:
    "firstName" : "Barry",
    "lastName" : "Gordy",
    "email" : "barry.gordy@toptal.com",
    "password" : "do-re-mi  "
  1. Press SEND. The response should just be a one line id for the new user created in this case.

To do next, modify the server

These are left as an exercise to the reader, as they say:

Implement proper validations (e.g., make sure that user email is unique)
Implement unit testing and error reporting
Prevent users from changing their own permission level
Prevent admins from removing themselves
Prevent disclosure of sensitive information (e.g., hashed passwords)
Move the JWT secret from common/config/env.config.js to an off-repo, non-environment-based secret distribution mechanism
Convert the codebase from its use of JavaScript promises over to the async/await technique.