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Ran 28 Apr 2026 05:10AM UTC

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Committed 28 Apr 2026 04:58AM UTC coverage: 88.833% (+0.04%) from 88.79%

Job # #20251.1

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push

github

Committed by

web-flow

Commit Message

xds: Add header mutations library (#12494)

This commit introduces a library for handling header mutations as
specified by the xDS protocol. This library provides the core
functionality for modifying request and response headers based on a set
of rules.

The main components of this library are:
- `HeaderMutator`: Applies header mutations to `Metadata` objects.
- `HeaderMutationFilter`: Filters header mutations based on a set of
configurable rules, such as disallowing mutations of system headers.
- `HeaderMutations`: A value class that represents the set of mutations
to be applied to request and response headers.
- `HeaderMutationDisallowedException`: An exception that is thrown when
a disallowed header mutation is attempted.

This commit also includes comprehensive unit tests for the new library.

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