A Pre-signed URL is used to allow untrusted users to temporary access to private S3 resources. (Example: upload an image to a private S3 bucket).

The URL is a string consists of:

1. AWS URL of the object to be accessed, and
2. A signed base64 string describing the HTTP request:

There's no questions about it: in the age of "fat" frontend clients, less bloat is better. A useful technique is to split off large libraries into separate Webpack chunks so the they don't take up space in your main bundle, delaying the initial load of your webapp. I like doing this with what I call the "installer pattern". Every split-out library gets its own "installer", an async function that loads the Webpack chunk, performs any initializations or configuration necessary, and then informs the relevant parts of your app that loading has completed.

Here's what that pattern looks like for installing the Sentry.io error reporting SDK:

First, add Sentry to your project:

You can deploy this function on any of the serverless platforms - AWS Lambda, Google Cloud Functions, Azure Functions, Netlify, Cloudflare Workers, etc.

1. Create a new function and paste in the following code.
2. You will need to add nodemailer to your package.json (npm i nodemailer), and follow your platform's instructions on bundling dependencies.
3. Obtain Gmail API credentials for your account. You will need clientID, clientSecret, and refreshToken. Follow this YouTube tutorial
4. Expose these credentials as the follwing environment variables:

GMAIL_EMAIL_ADDRESS

To access the Sheets API, you will need to enable the Sheets API, obtain credentials, and grant access to your Sheet.

Based on these instructions

1. Open the Google Developers Console
2. Select your project or create a new one (and then select it)

Last update: June 2020

AWS is notorious for it's incredibly complicated security model. This guide will walk you through setting up a fully-featured build & upload script for your Lambda functions.

• An AWS account

To use local env vars, you must follow the following steps:

1. Declare all env vars in your template.yml, like so:

Resources:
  MyFunction:
 Type: AWS::Serverless::Function 

A quick script for testing how well a JSON file compresses

// Imports

const fs = require('fs');
const { promisify } = require('util');
const { deflate } = require('zlib');

These are the 35 root categories on Amazon.com.

Retrieved via Keepa API on April 12, 2021.

API call:

https://api.keepa.com/category?key=<REDACTED>&domain=1&category=0&parents=1