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Merge pull request #4618 from MichaelEischer/workaround-rclone-list-errors

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rclone: Workaround for incorrect "not found" errors while listing files
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Michael Eischer 2024-01-09 18:28:31 +01:00 committed by GitHub
commit 7b2de84763
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2 changed files with 18 additions and 2 deletions
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11
changelog/unreleased/issue-4612 Normal file
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@ -0,0 +1,11 @@
Bugfix: Improve error handling for `rclone` backend
Since restic 0.16.0, if rclone encountered an error while listing files,
this could in rare circumstances cause restic to assume that there are no
files. Although unlikely, this situation could result in data loss if it
were to happen right when the `prune` command is listing existing snapshots.
Error handling has now been improved to detect and work around this case.
https://github.com/restic/restic/issues/4612
https://github.com/restic/restic/pull/4618

9
internal/backend/rest/rest.go
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@ -328,8 +328,13 @@ func (b *Backend) List(ctx context.Context, t backend.FileType, fn func(backend.
}
if resp.StatusCode == http.StatusNotFound {
// ignore missing directories
return nil
if !strings.HasPrefix(resp.Header.Get("Server"), "rclone/") {
// ignore missing directories, unless the server is rclone. rclone
// already ignores missing directories, but misuses "not found" to
// report certain internal errors, see
// https://github.com/rclone/rclone/pull/7550 for details.
return nil
}
}
if resp.StatusCode != http.StatusOK {