bugfix: sign content-type and x-amz-user-agent#3310
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smilkuri
approved these changes
Jun 19, 2026
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Description of changes:
Fixes #3283
Removes
X-Amz-User-AgentfromSignatureV4's header blacklist- its casing prevented it from being discovered when signing standard requests. Also removescontent-type, which is fine to sign in most cases except for presigned get requests. Adds a new$presignHeaderDenyListthat specifies bothx-amz-user-agentandcontent-type(for backward-compatibility).By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.