[GH-ISSUE #994] fake-gcs-server does not respect ifGenerationMatch #156

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opened 2026-03-03 12:08:48 +03:00 by kerem · 2 comments

kerem commented

2026-03-03 12:08:48 +03:00

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Originally created by @bentheiii on GitHub (Nov 27, 2022).
Original GitHub issue: https://github.com/fsouza/fake-gcs-server/issues/994

It would appear that live objects are being modified even with ifGenerationMatch=0

steps to reproduce:

create a new empty bucket standard.

send the following request:

POST /upload/storage/v1/b/standard/o?ifGenerationMatch=0&name=my-file.txt.json.final.zip.zip&uploadType=media

with the body 0

confirm that the file's value is up-to-date

GET /storage/v1/b/standard/o/my-file.txt.json.final.zip.zip?alt=media

you should get 0

send the upload request again

POST /upload/storage/v1/b/standard/o?ifGenerationMatch=0&name=my-file.txt.json.final.zip.zip&uploadType=media

this time with body 1

confirm that the file's value has been changed

GET /storage/v1/b/standard/o/my-file.txt.json.final.zip.zip?alt=media

you should get 1

Originally created by @bentheiii on GitHub (Nov 27, 2022). Original GitHub issue: https://github.com/fsouza/fake-gcs-server/issues/994 It would appear that live objects are being modified even with `ifGenerationMatch=0` steps to reproduce: * create a new empty bucket `standard`. * send the following request: ``` POST /upload/storage/v1/b/standard/o?ifGenerationMatch=0&name=my-file.txt.json.final.zip.zip&uploadType=media ``` with the body `0` * confirm that the file's value is up-to-date ``` GET /storage/v1/b/standard/o/my-file.txt.json.final.zip.zip?alt=media ``` you should get `0` * send the upload request again ``` POST /upload/storage/v1/b/standard/o?ifGenerationMatch=0&name=my-file.txt.json.final.zip.zip&uploadType=media ``` this time with body `1` * confirm that the file's value has been changed ``` GET /storage/v1/b/standard/o/my-file.txt.json.final.zip.zip?alt=media ``` you should get `1`

kerem commented

2026-03-03 12:08:49 +03:00

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@fsouza commented on GitHub (Nov 27, 2022):

@bentheiii which backend are you using? memory or filesystem? If the filesystem, what's your OS?

@fsouza commented on GitHub (Nov 27, 2022): @bentheiii which backend are you using? memory or filesystem? If the filesystem, what's your OS?

kerem commented

2026-03-03 12:08:49 +03:00

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@bentheiii commented on GitHub (Dec 6, 2022):

Hi @fsouza , I am using the default docker backend (filesystem), the OS is windows though docker.

@bentheiii commented on GitHub (Dec 6, 2022): Hi @fsouza , I am using the default docker backend (filesystem), the OS is windows though docker.