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rest/rclone/s3/sftp/swift: move short file detection behind feature gate

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These backends tend to use a large variety of server implementations.
Some of those implementations might prove problematic with the new
checks.
This commit is contained in:
Michael Eischer 2024-05-12 11:55:34 +02:00
parent 6328b7e1f5
commit 394c8ca3ed
4 changed files with 8 additions and 4 deletions
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3
internal/backend/rest/rest.go
View file

@ -17,6 +17,7 @@ import (
"github.com/restic/restic/internal/backend/util"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/feature"
)
// make sure the rest backend implements backend.Backend
@ -245,7 +246,7 @@ func (b *Backend) openReader(ctx context.Context, h backend.Handle, length int,
return nil, &restError{h, resp.StatusCode, resp.Status}
}
if length > 0 && resp.ContentLength != int64(length) {
if feature.Flag.Enabled(feature.BackendErrorRedesign) && length > 0 && resp.ContentLength != int64(length) {
return nil, &restError{h, http.StatusRequestedRangeNotSatisfiable, "partial out of bounds read"}
}

3
internal/backend/s3/s3.go
View file

@ -17,6 +17,7 @@ import (
"github.com/restic/restic/internal/backend/util"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/feature"
"github.com/minio/minio-go/v7"
"github.com/minio/minio-go/v7/pkg/credentials"
@ -404,7 +405,7 @@ func (be *Backend) openReader(ctx context.Context, h backend.Handle, length int,
return nil, err
}
if length > 0 {
if feature.Flag.Enabled(feature.BackendErrorRedesign) && length > 0 {
if info.Size > 0 && info.Size != int64(length) {
_ = rd.Close()
return nil, minio.ErrorResponse{Code: "InvalidRange", Message: "restic-file-too-short"}

3
internal/backend/sftp/sftp.go
View file

@ -20,6 +20,7 @@ import (
"github.com/restic/restic/internal/backend/util"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/feature"
"github.com/cenkalti/backoff/v4"
"github.com/pkg/sftp"
@ -426,7 +427,7 @@ func (r *SFTP) checkNoSpace(dir string, size int64, origErr error) error {
// given offset.
func (r *SFTP) Load(ctx context.Context, h backend.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
return util.DefaultLoad(ctx, h, length, offset, r.openReader, func(rd io.Reader) error {
if length == 0 {
if length == 0 || !feature.Flag.Enabled(feature.BackendErrorRedesign) {
return fn(rd)
}

3
internal/backend/swift/swift.go
View file

@ -19,6 +19,7 @@ import (
"github.com/restic/restic/internal/backend/util"
"github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/feature"
"github.com/ncw/swift/v2"
)
@ -156,7 +157,7 @@ func (be *beSwift) openReader(ctx context.Context, h backend.Handle, length int,
return nil, fmt.Errorf("conn.ObjectOpen: %w", err)
}
if length > 0 {
if feature.Flag.Enabled(feature.BackendErrorRedesign) && length > 0 {
// get response length, but don't cause backend calls
cctx, cancel := context.WithCancel(context.Background())
cancel()