feat: validate caller-provided regions in client config #1741
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0marperez
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Nov 24, 2025
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0marperez
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Nice documentation/comments throughout the PR👍
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Issue #
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Description of changes
This change adds validation for caller-provided regions specified in client config, such as
regionandregionProvider. The validation ensures the region is suitable to use in a URI hostname according to RFC 3986 § 3.2.2. Valid characters for regions now include:AthroughZ)athroughz)0through9)-).)~)_)%)&)')*),)$)=)!)(and))+);)Notable characters which are invalid for regions include:
@)`){and})[and])^):)")#)<and>)|)?)/and\)By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.