[GH-ISSUE #267] partial responses using fields query parameter not implemented #53

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opened 2026-03-03 12:07:48 +03:00 by kerem · 0 comments

kerem commented

2026-03-03 12:07:48 +03:00

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Originally created by @anz-rfc on GitHub (Jun 11, 2020).
Original GitHub issue: https://github.com/fsouza/fake-gcs-server/issues/267

this issue is just to note one gap in behaviour between real GCS backend and this great fake-gcs-server : the fake server does not appear to implement partial response support using the fields query parameter, if given the fields query param appears to be ignored.

examples of behaviour of passing fields parameter against GCS backend:

if`fields=prefixes`, expected response should only contain prefixes , no items

https://storage.googleapis.com/storage/v1/b/gcp-public-data-landsat/o?prefix=LC08%2f01%2f001%2f002%2fLC08_L1GT_001002_20160817_20170322_01_T2%2f&delimiter=B&fields=prefixes

if`fields=items(name)`, expected response should only contain name field of each item

https://storage.googleapis.com/storage/v1/b/gcp-public-data-landsat/o?prefix=LC08%2f01%2f001%2f002%2fLC08_L1GT_001002_20160817_20170322_01_T2%2f&delimiter=B&fields=items(name)

if `fields=FOOBARR` expected failure because fields specifies a nonsensical attribute name

https://storage.googleapis.com/storage/v1/b/gcp-public-data-landsat/o?prefix=LC08%2f01%2f001%2f002%2fLC08_L1GT_001002_20160817_20170322_01_T2%2f&delimiter=B&fields=FOOBARR

c.f. "partial response" https://cloud.google.com/storage/docs/json_api/v1/how-tos/performance

c.f. SetAttrSelection in the gcs client library: https://godoc.org/cloud.google.com/go/storage#Query.SetAttrSelection

Originally created by @anz-rfc on GitHub (Jun 11, 2020). Original GitHub issue: https://github.com/fsouza/fake-gcs-server/issues/267 this issue is just to note one gap in behaviour between real GCS backend and this great fake-gcs-server : the fake server does not appear to implement partial response support using the fields query parameter, if given the fields query param appears to be ignored. examples of behaviour of passing fields parameter against GCS backend: ### if`fields=prefixes`, expected response should only contain prefixes , no items https://storage.googleapis.com/storage/v1/b/gcp-public-data-landsat/o?prefix=LC08%2f01%2f001%2f002%2fLC08_L1GT_001002_20160817_20170322_01_T2%2f&delimiter=B&fields=prefixes ### if`fields=items(name)`, expected response should only contain name field of each item https://storage.googleapis.com/storage/v1/b/gcp-public-data-landsat/o?prefix=LC08%2f01%2f001%2f002%2fLC08_L1GT_001002_20160817_20170322_01_T2%2f&delimiter=B&fields=items(name) ### if `fields=FOOBARR` expected failure because fields specifies a nonsensical attribute name https://storage.googleapis.com/storage/v1/b/gcp-public-data-landsat/o?prefix=LC08%2f01%2f001%2f002%2fLC08_L1GT_001002_20160817_20170322_01_T2%2f&delimiter=B&fields=FOOBARR c.f. "partial response" https://cloud.google.com/storage/docs/json_api/v1/how-tos/performance c.f. SetAttrSelection in the gcs client library: https://godoc.org/cloud.google.com/go/storage#Query.SetAttrSelection