general-coding

Why CORS exists, how it works, and how to use it to properly setup cross-origin requests.

If you’ve ever deployed Spring Boot behind a load balancer, you might be aware of issues coming from differences between the request into the load balancer and the request into your application. These requests will often have a different protocol, host, or port. If Spring Boot isn’t correctly setup it can lead to all sorts of mayhem, such as generating incorrect URLs for you application. In this article you’ll discover how to make use of the X-Forwarded headers passed from a load balancer to your Spring Boot application, to help your application generate URLs correctly based on the originating request....

AWS Lambda functions are a great way to execute short-running processes without worrying about what hardware they’re going to run on. Sometimes though, we have a requirement to execute a longer-lived process, but unfortunately AWS imposes a 15 minute execution limit. Fear not though, because in this article you’ll learn how to write recursive Node.js JavaScript Lambda functions which call themselves, bypassing the execution time limit. 1. Overview In October 2018 AWS increased the Lambda execution time limit to 15 minutes:...