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sign.go
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sign.go
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package object
import (
"context"
"crypto/ecdsa"
"fmt"
"github.com/nspcc-dev/neofs-api-go/v2/object"
"github.com/nspcc-dev/neofs-node/pkg/services/util"
)
type SignService struct {
key *ecdsa.PrivateKey
sigSvc *util.SignService
svc ServiceServer
}
type searchStreamSigner struct {
util.ServerStream
respWriter util.ResponseMessageWriter
nonEmptyResp bool // set on first Send call
}
type getStreamSigner struct {
util.ServerStream
respWriter util.ResponseMessageWriter
}
type putStreamSigner struct {
stream *util.RequestMessageStreamer
}
type getRangeStreamSigner struct {
util.ServerStream
respWriter util.ResponseMessageWriter
}
func NewSignService(key *ecdsa.PrivateKey, svc ServiceServer) *SignService {
return &SignService{
key: key,
sigSvc: util.NewUnarySignService(key),
svc: svc,
}
}
func (s *getStreamSigner) Send(resp *object.GetResponse) error {
return s.respWriter(resp)
}
func (s *SignService) Get(req *object.GetRequest, stream GetObjectStream) error {
return s.sigSvc.HandleServerStreamRequest(req,
func(resp util.ResponseMessage) error {
return stream.Send(resp.(*object.GetResponse))
},
func() util.ResponseMessage {
return new(object.GetResponse)
},
func(respWriter util.ResponseMessageWriter) error {
return s.svc.Get(req, &getStreamSigner{
ServerStream: stream,
respWriter: respWriter,
})
},
)
}
func (s *putStreamSigner) Send(req *object.PutRequest) error {
return s.stream.Send(req)
}
func (s *putStreamSigner) CloseAndRecv() (*object.PutResponse, error) {
r, err := s.stream.CloseAndRecv()
if err != nil {
return nil, fmt.Errorf("could not receive response: %w", err)
}
return r.(*object.PutResponse), nil
}
func (s *SignService) Put(ctx context.Context) (PutObjectStream, error) {
stream, err := s.svc.Put(ctx)
if err != nil {
return nil, fmt.Errorf("could not create Put object streamer: %w", err)
}
return &putStreamSigner{
stream: s.sigSvc.CreateRequestStreamer(
func(req any) error {
return stream.Send(req.(*object.PutRequest))
},
func() (util.ResponseMessage, error) {
return stream.CloseAndRecv()
},
func() util.ResponseMessage {
return new(object.PutResponse)
},
),
}, nil
}
func (s *SignService) Head(ctx context.Context, req *object.HeadRequest) (*object.HeadResponse, error) {
resp, err := s.sigSvc.HandleUnaryRequest(ctx, req,
func(ctx context.Context, req any) (util.ResponseMessage, error) {
return s.svc.Head(ctx, req.(*object.HeadRequest))
},
func() util.ResponseMessage {
return new(object.HeadResponse)
},
)
if err != nil {
return nil, err
}
return resp.(*object.HeadResponse), nil
}
func (s *searchStreamSigner) Send(resp *object.SearchResponse) error {
s.nonEmptyResp = true
return s.respWriter(resp)
}
func (s *SignService) Search(req *object.SearchRequest, stream SearchStream) error {
return s.sigSvc.HandleServerStreamRequest(req,
func(resp util.ResponseMessage) error {
return stream.Send(resp.(*object.SearchResponse))
},
func() util.ResponseMessage {
return new(object.SearchResponse)
},
func(respWriter util.ResponseMessageWriter) error {
stream := &searchStreamSigner{
ServerStream: stream,
respWriter: respWriter,
}
err := s.svc.Search(req, stream)
if err == nil && !stream.nonEmptyResp {
// The higher component does not write any response in the case of an empty result (which is correct).
// With the introduction of status returns at least one answer must be signed and sent to the client.
// This approach is supported by clients who do not know how to work with statuses (one could make
// a switch according to the protocol version from the request, but the costs of sending an empty
// answer can be neglected due to the gradual refusal to use the "old" clients).
return stream.Send(new(object.SearchResponse))
}
return err
},
)
}
func (s *SignService) Delete(ctx context.Context, req *object.DeleteRequest) (*object.DeleteResponse, error) {
resp, err := s.sigSvc.HandleUnaryRequest(ctx, req,
func(ctx context.Context, req any) (util.ResponseMessage, error) {
return s.svc.Delete(ctx, req.(*object.DeleteRequest))
},
func() util.ResponseMessage {
return new(object.DeleteResponse)
},
)
if err != nil {
return nil, err
}
return resp.(*object.DeleteResponse), nil
}
func (s *getRangeStreamSigner) Send(resp *object.GetRangeResponse) error {
return s.respWriter(resp)
}
func (s *SignService) GetRange(req *object.GetRangeRequest, stream GetObjectRangeStream) error {
return s.sigSvc.HandleServerStreamRequest(req,
func(resp util.ResponseMessage) error {
return stream.Send(resp.(*object.GetRangeResponse))
},
func() util.ResponseMessage {
return new(object.GetRangeResponse)
},
func(respWriter util.ResponseMessageWriter) error {
return s.svc.GetRange(req, &getRangeStreamSigner{
ServerStream: stream,
respWriter: respWriter,
})
},
)
}
func (s *SignService) GetRangeHash(ctx context.Context, req *object.GetRangeHashRequest) (*object.GetRangeHashResponse, error) {
resp, err := s.sigSvc.HandleUnaryRequest(ctx, req,
func(ctx context.Context, req any) (util.ResponseMessage, error) {
return s.svc.GetRangeHash(ctx, req.(*object.GetRangeHashRequest))
},
func() util.ResponseMessage {
return new(object.GetRangeHashResponse)
},
)
if err != nil {
return nil, err
}
return resp.(*object.GetRangeHashResponse), nil
}