How to debug S3 connection?

[LukasBombach]

I'm trying to copy some JSON to S3, but I get a statusCode 400 (Bad Request). Is there a way to tell the reason for this? I don't know if I use wrong credentials or what else could have happened.

[LukasBombach]

It's definitely my credentials btw, I have checked. I still don't know how to debug this, I can't even find anything useful in the debugger. No message string, no method.

[LukasBombach]

Ok apparently knox just does not work with Frankfurt because it does not support signature v4. See #273 .

[krstffr]

Wow, trying to debug this has consumed so much of my time. :(

Thank you @LukasBombach