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What's this "AJAX" you speak of? For non-developers, AJAX stands for "Asynchronous JavaScript and XML", and basically means a way of updating a webpage, e.g. in response to a user clicking something, without having to reload the entire page as was common in t...

Connection pools take up connections even if they're not being used Your database server is going to have some maximum number of connections it can handle at one time (depending on the hardware configuration, and also the SQL engine version). If you allocate ...

Strictly speaking, Amazon RDS does not give you full root privileges on your database server (so they can maintain it properly). This has a few effects you might not expect. Adding stored procedures and functions The default configurations won't let you add ...

Minor version upgrades You can do these easily in the RDS console (be aware they will cause some downtime). Major version upgrades For some reason, the RDS console doesn't actually allow you to perform major version upgrades - a flag required to do so is mi...

Check the User-Agent header for incoming requests Depending on your load balancer, it will periodically send its own requests to your webservers, to check they are still able to serve requests (i.e. the load balancer needs to know which of your webservers it ...

The main way Deserted Chateau's frontend works is documented here. Page Loading Most dynamic information is loaded onto pages via jQuery AJAX requests, except for some pages where this approach causes a janky loading appearance. At the moment, the user profi...

Element ID standards Gallery elements all conform to the following element ID standard: ${prefix}gallery-image-${elementName} Prefix: a prefix defined for a given gallery. The default gallery has an empty string prefix; other galleries have prefixes to al...

Hi everyone, hope you're well. Had a pretty rough two weeks, but I got a decent amount done, nonetheless. Updates below! Documentation server I’ve added more documentation about potential pitfalls when upgrading LAMP stack webservers (various oddities in PHP...

To prevent other sites hotlinking to content (and eating up bandwidth), we can specify a list of allowed referrers in our CDN configuration, meaning that any request not coming from those referrer domains will get a 403 Forbidden error. On BunnyCDN, go to you...

While CloudFront natively supports websockets, there is one major pitfall you can end up running into: You can't use a custom port for the WebSocket connection If you're running some server that has say, Apache serving normal HTTP/HTTPS requests and a Node.j...

Homepage https://github.com/digitalfortress-tech/localstorage-slim What is it? A lightweight library for making browser storage a little bit less tedious. Why did we choose it? It's extremely small and low in size, doesn't have any particular requirements...

Homepage https://www.php.net/ What is it? A scripting language used for back-end code (it stands for PHP Hypertext Processor... yep, it's a recursive acronym). Why did we choose it? It's ancient, reliable, and works well, plus as another ancient entity I'...

Homepage https://www.w3.org/standards/history/html52/ https://www.w3.org/TR/CSS/#css https://ecma-international.org/publications-and-standards/standards/ecma-262/ What is it? The three "core" languages of website design and implementation. HTML is a marku...

The free managed rule groups still incur a charge Be aware that, although the AWS managed rule groups that are listed as "free" don't incur any specific extra charges, they do still incur the standard $1/month fee for each rule attached to your WAF ACL. If y...

Hi all, hope you're doing well ^^ updates below! HTML / JS / CSS improvements, continued Fixed fadeins and fadeouts on profile pages not always working correctly. Also been doing some interface improvements, e.g. allowing enter key to be used for form submis...

Differences vs. server-side caching Client-side caching is not secure, no matter what you do. Do not use client-side caching for any sensitive data, or for data that needs to be kept secret. Storage limits on client-side caching are a lot smaller (most mod...

Overview I am no expert in interface design, but I do know the basics (and thankfully, there are helpful tools and libraries out there these days to help make these tasks easier than they used to be). The aim of this chapter is to explain some of the most im...

Feedback is when something reacts to the user, giving them some indication that an action occurred. In the context of user interfaces and websites, this usually means styling effects that help a user to understand how to navigate the interface. Common example...