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feat(storage): expose object_metadata on AsyncMultiRangeDownloader - #17411
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This pull request adds tracking for object metadata in the AsyncMultiRangeDownloader class by initializing and copying object_metadata from the underlying stream. The reviewer suggests refactoring this attribute into a read-only property that dynamically delegates to the stream, which simplifies the code by removing the need for manual assignments in multiple places.
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Hi @yuxin00j Can you also add a system test for the same in packages/google-cloud-storage/tests/system/test_zonal.py since this PR is approved, you may do it in follow up PR |
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This PR exposes the
object_metadataattribute on theAsyncMultiRangeDownloaderclass.Context
In PR #17261,
object_metadatawas successfully exposed on theAsyncReadObjectStream. However, it was not surfaced on theAsyncMultiRangeDownloader(MRD), meaning high-level libraries relying on MRD (likefsspec/gcsfs) cannot access the underlying gRPC metadata.By inheriting and surfacing
self.object_metadata = self.read_obj_str.object_metadata, this allows downstream users to completely bypass redundantRESTinfo()API calls and extract fields likecrc32c,size, andgenerationdirectly from the MRD instance.cc @chandra-siri