Go

If you’re serving a Fiber app over HTTPS and you haven’t set HSTS yet, you’re leaving a pretty obvious gap in transport security. HSTS tells the browser: “stop trying plain HTTP for this site, always use HTTPS.” That blocks protocol downgrade attacks, strips out a whole class of SSL-stripping nonsense, and reduces accidental insecure requests from users who type example.com instead of https://example.com. For Go developers, the good news is that HSTS is just a response header. The bad news is that it’s also one of those headers that can lock users into a bad config if you ship it carelessly. ...

HSTS is one of those headers that’s easy to add and surprisingly easy to get wrong. If you run a Go app with Echo, you can enable it in a few lines. The hard part is choosing the right policy, rolling it out safely, and not locking yourself into a bad preload decision. This is the reference I wish more teams had handy. What HSTS does Strict-Transport-Security tells browsers: always use HTTPS for this site for a period of time you define optionally for all subdomains too optionally with preload eligibility A typical header looks like this: ...

If you run a Gin app over HTTPS and you’re not sending HSTS, you’re leaving an easy downgrade path open. HSTS tells browsers: “stop trying plain HTTP for this site; always use HTTPS.” That shuts down a bunch of avoidable mistakes and some very real attack paths. The catch: HSTS is one of those headers that looks trivial but can absolutely bite you in production if you roll it out carelessly. I’ve seen teams turn it on with preload flags before they were ready, then spend days untangling broken subdomains and internal tools. ...