frostfs-sdk-go/client/errors.go
Leonard Lyubich 09ed6077f9 [#278] client: Support wrapped errors in error checkers
Client errors are quite often wrapped in context. When checking a
specific error, it is required not to lose the ability to determine it,
regardless of the attached context. In previous implementation `IsErr*`
functions didn't support wrapped errors.

Make `IsErr*` functions to preliminarily unwrap `error` argument before
type assertion. Use `errors.Unwrap` for this instead of `errors.As`
since the latter has the overhead of filling in an error.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
2022-06-28 09:06:13 +03:00

55 lines
1.3 KiB
Go

package client
import (
"errors"
apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
)
// unwraps err using errors.Unwrap and returns the result.
func unwrapErr(err error) error {
for e := errors.Unwrap(err); e != nil; e = errors.Unwrap(err) {
err = e
}
return err
}
// IsErrContainerNotFound checks if err corresponds to NeoFS status
// return corresponding to missing container. Supports wrapped errors.
func IsErrContainerNotFound(err error) bool {
switch unwrapErr(err).(type) {
default:
return false
case
apistatus.ContainerNotFound,
*apistatus.ContainerNotFound:
return true
}
}
// IsErrObjectNotFound checks if err corresponds to NeoFS status
// return corresponding to missing object. Supports wrapped errors.
func IsErrObjectNotFound(err error) bool {
switch unwrapErr(err).(type) {
default:
return false
case
apistatus.ObjectNotFound,
*apistatus.ObjectNotFound:
return true
}
}
// IsErrObjectAlreadyRemoved checks if err corresponds to NeoFS status
// return corresponding to already removed object. Supports wrapped errors.
func IsErrObjectAlreadyRemoved(err error) bool {
switch unwrapErr(err).(type) {
default:
return false
case
apistatus.ObjectAlreadyRemoved,
*apistatus.ObjectAlreadyRemoved:
return true
}
}