Flush action doesn't use proper region while using S3

[upgreydd]

Finally configured s3 cache, but endpoint: https://my-bucket-drone.s3.ap-south-1.amazonaws.com which is in ap-south-1 with flush returns:

The authorization header is malformed; the region 'us-east-1' is wrong; expecting 'ap-south-1' 

rebuild and restore works fine ;)

[donny-dont]

Ok cool so it looks like I would need to parse urls of the scheme

https://bucket-name.s3.Region.amazonaws.com/key name

And this scheme

https://s3.Region.amazonaws.com/bucket-name/key name

And I could take s3 urls but those would need to provide the region

S3://bucket-name/key-name

From https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html

[upgreydd]

@donny-dont There's a region in env vars so probably S3://bucket-url will be more AWS way.
BTW. Probably you're parsing in rebuild and restore actions cause they works fine, only flush failures.

[donny-dont]

@upgreydd #59 I think might get your issues solved. If you can build it locally and try it against things that'd be super helpful.