[happymellon]

First line can be terrible, and I've had situations where I have tickets stuck in first line because someone in a timezone 12 hours different picked it up.

They then are resolved several times without an actual resolution. The last time it happened I only found out in the end it was fixed was because I managed to speak to a member of the technical team for a different reason and enquired.

It was the API Gateway dropping headers that contained underscores that happened for about 6 months last year if it impacted anyone else.

In relative terms though, they are far and away better than the alternatives. At least I can get to speak to people quite easily, and I was able to even speak to folks on the team working on API Gateway and they even got my ticket.

[withinboredom]

I didn't even know it was possible to put underscores in headers. I would think many proxy servers would drop them.

[happymellon]

The joys of inheriting codebases is that you learn all sorts of edge cases.

Apache used to silently drop http headers with underscores in them because they state incorrectly that it is against spec, which Nginx then decided to copy in the name of "security" although it was just a flag so could be ignored if you aren't doing CGI scripting.

AWS silently added this to load balancers in 2019 until there was a backlash and they restored functionality, and then tried again to add this to API Gateways in early 2020 until, again, people complained.

HA Proxy doesn't, never did and likely never will because underscores are valid.

https://serverfault.com/questions/855720/how-to-prevent-hapr...