Authentication with an Express API and Postgres
Let's make sure our Express app has the required base modules:
# within root of API npm install --save express pg knex bcrypt npm install --save-dev nodemon
Express makes it easy to nest routes in your routers. But I always had trouble accessing the request object's
.params when you had a long URI with multiple parameters and nested routes.
Let's say you're building routes for a website
www.music.com. Music is organized into albums with multiple tracks. Users can click to see a track list. Then they can select a single track and see a sub-page about that specific track.
At our application level, we could first have a Router to handle any requests to our albums.
const express = require('express');
|# Retrieve AWS instrance's commonly used metadata. Require curl.|
|# ./get-metadata help|
|# ./get-metadata id|
|# Input is case insensitive; format to uppper case to generate self-help page.|
|roleProfile=$(curl -s http://169.254.169.254/latest/meta-data/iam/info \|
|| grep -Eo 'instance-profile/([a-zA-Z.-]+)' | sed 's#instance-profile/##')|