(short issue description)generate_presigned_post documentation should provide a link to S3 doc explaining regional default variation in response

[jrobbins-LiveData]

Describe the issue

While documented in a Note here, the boto3 documentation here ought to include a copy of that Note or a link to that page, because it is surprising to call a boto3 function and have the response fields vary with the region.

It would also be helpful to have the boto3 document show that the default legacy behavior on older regions can be upgraded to "modern" via, e.g.

from botocore.client import Config

s3_client = boto3.client('s3', 'us-east-1', config=Config(signature_version='s3v4'))

Text of the Note

Amazon S3 supports Signature Version 4, a protocol for authenticating inbound API requests to AWS services, in all AWS Regions. At this time, AWS Regions created before January 30, 2014 will continue to support the previous protocol, Signature Version 2. Any new Regions after January 30, 2014 will support only Signature Version 4 and therefore all requests to those Regions must be made with Signature Version 4. For more information about AWS Signature Version 2, see Signing and Authenticating REST Requests in the Amazon Simple Storage Service User Guide.

Links

https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3/client/generate_presigned_post.html

[adev-code]

Hello @jrobbins-LiveData, thanks for reaching out and finding out a better way for the boto3 documentation. I have reached out to the documentation in regards. If you have any other questions, please let us know. Thank you.

For internal use: P171266421