Allow to sign additional headers in request

[avoidik]

This change will allow you to sign additional headers in request

Linked issue #38

[BlaiseGratton]

Any intentions to get this merged in? Currently needing precisely this functionality.

[DavidMuller]

Not planning on merging this one as the use case seems to involve non AWS services.

[avoidik]

This use-case covers optional headers to sign mentioned at
https://docs.aws.amazon.com/general/latest/gr/sigv4-signed-request-examples.html

# Note: The request can include any headers; canonical_headers and
# signed_headers lists those that you want to be included in the 
# hash of the request. "Host" and "x-amz-date" are always required.

[avoidik]

still no? :)

[rezen]

@DavidMuller I'm confused by the statement - "use case seems to involve non AWS services"? AWS signed requests can only be used by AWS?

[avoidik]

one more header, ref. https://github.com/kubernetes-sigs/aws-iam-authenticator#api-authorization-from-outside-a-cluster

x-k8s-aws-id

still no? :)

[avoidik]

Hey hey, stumbled upon yet another header for otel and then immediately recalled this PR. Still no? :)

[rezen]

@avoidik you can create a request using AWSRequest from botocore. You can probably pull from the first python code snippet to make a request

https://ahermosilla.com/cloud/2020/11/17/leveraging-aws-signed-requests.html#use-botocore-to-create-client