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s3: detect looping when using gcs and versions

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Apparently gcs doesn't return an S3 compatible result when using
versions.

In particular it doesn't return a NextKeyMarker - this means rclone
loops and fetches the same page over and over again.

This patch detects the problem and stops the infinite retries but it
doesn't fix the underlying problem.

See: https://forum.rclone.org/t/list-s3-versions-files-looping-bug/42974
See: https://issuetracker.google.com/u/0/issues/312292516
This commit is contained in:
Nick Craig-Wood 2023-11-21 10:30:47 +00:00
parent 668711e432
commit ba11040d6b
2 changed files with 9 additions and 0 deletions
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3
backend/s3/s3.go
View File

@ -3721,6 +3721,9 @@ func (ls *versionsList) List(ctx context.Context) (resp *s3.ListObjectsV2Output,
// Set up the request for next time
ls.req.KeyMarker = respVersions.NextKeyMarker
ls.req.VersionIdMarker = respVersions.NextVersionIdMarker
if aws.BoolValue(respVersions.IsTruncated) && ls.req.KeyMarker == nil {
return nil, nil, errors.New("s3 protocol error: received versions listing with IsTruncated set with no NextKeyMarker")
}
// If we are URL encoding then must decode the marker
if ls.req.KeyMarker != nil && ls.req.EncodingType != nil {

6
docs/content/s3.md
View File

@ -3685,6 +3685,12 @@ secret_access_key = your_secret_key
endpoint = https://storage.googleapis.com
```
**Note** that `--s3-versions` does not work with GCS when it needs to do directory paging. Rclone will return the error:
s3 protocol error: received versions listing with IsTruncated set with no NextKeyMarker
This is Google bug [#312292516](https://issuetracker.google.com/u/0/issues/312292516).
### DigitalOcean Spaces
[Spaces](https://www.digitalocean.com/products/object-storage/) is an [S3-interoperable](https://developers.digitalocean.com/documentation/spaces/) object storage service from cloud provider DigitalOcean.