botocore still ignore "HTTP/1.1 100"

[kbgksj]

Describe the bug

Related Issue

• botocore ignore "HTTP/<version> 100"  #1943
• valid HTTP responses without a reason phrase considered malformed #1931

I think botocore still ignore "HTTP/1.1 100" that does not contain reason-phrase content (Continue).
Is there any reason?

Expected Behavior

When a s3 server returns 100 Status code without reason phrase (Continue),
boto3 should work without errors.

Current Behavior

boto3 raises errors ( botocore.exceptions.ConnectionClosedError: Connection was closed before we received a valid response from endpoint URL )

Reproduction Steps

1. Run boto3's put_object function to a custom endpoint_url (custom s3 server)
2. If a custom s3 server returns 100 code without reason phrase, the client (boto3) raises errors

Possible Solution

change one of the following functions in awsrequest.py (https://github.com/boto/botocore/blob/develop/botocore/awsrequest.py)

• _is_100_continue_status
• _handle_expect_response

Additional Information/Context

No response

SDK version used

Version: 1.34.73

Environment details (OS name and version, etc.)

Redhat 7.9

[tim-finnigan]

Thanks for bringing this issue back to our attention. It looks like the original issue (#1931) auto-closed due to lack of activity. I can reopen that one to continue tracking and bring it up with the team for discussion. It looks like a PR was submitted for this (#1932) and was approved but the team decided to close it and its not clear why. Please refer to that original issue for updates going forward.

[github-actions]

This issue is now closed. Comments on closed issues are hard for our team to see.
If you need more assistance, please open a new issue that references this one.