package getsvc import ( "context" "crypto/ecdsa" "errors" "io" "sync" objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object" "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/pkg/tracing" "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc" rpcclient "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client" "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session" "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network" "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal" internalclient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal/client" "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object" "go.opentelemetry.io/otel/attribute" "go.opentelemetry.io/otel/trace" ) type getRequestForwarder struct { OnceResign *sync.Once OnceHeaderSending *sync.Once GlobalProgress int Key *ecdsa.PrivateKey Request *objectV2.GetRequest Stream *streamObjectWriter } func (f *getRequestForwarder) forwardRequestToNode(ctx context.Context, addr network.Address, c client.MultiAddressClient, pubkey []byte) (*object.Object, error) { ctx, span := tracing.StartSpanFromContext(ctx, "getRequestForwarder.forwardRequestToNode", trace.WithAttributes(attribute.String("address", addr.String())), ) defer span.End() var err error // once compose and resign forwarding request f.OnceResign.Do(func() { // compose meta header of the local server metaHdr := new(session.RequestMetaHeader) metaHdr.SetTTL(f.Request.GetMetaHeader().GetTTL() - 1) // TODO: #1165 think how to set the other fields metaHdr.SetOrigin(f.Request.GetMetaHeader()) writeCurrentVersion(metaHdr) f.Request.SetMetaHeader(metaHdr) err = signature.SignServiceMessage(f.Key, f.Request) }) if err != nil { return nil, err } getStream, err := f.openStream(ctx, addr, c) if err != nil { return nil, err } return nil, f.readStream(ctx, c, getStream, pubkey) } func (f *getRequestForwarder) verifyResponse(resp *objectV2.GetResponse, pubkey []byte) error { // verify response key if err := internal.VerifyResponseKeyV2(pubkey, resp); err != nil { return err } // verify response structure if err := signature.VerifyServiceMessage(resp); err != nil { return errResponseVerificationFailed(err) } return checkStatus(resp.GetMetaHeader().GetStatus()) } func (f *getRequestForwarder) writeHeader(ctx context.Context, v *objectV2.GetObjectPartInit) error { obj := new(objectV2.Object) obj.SetObjectID(v.GetObjectID()) obj.SetSignature(v.GetSignature()) obj.SetHeader(v.GetHeader()) var err error f.OnceHeaderSending.Do(func() { err = f.Stream.WriteHeader(ctx, object.NewFromV2(obj)) }) if err != nil { return errCouldNotWriteObjHeader(err) } return nil } func (f *getRequestForwarder) openStream(ctx context.Context, addr network.Address, c client.MultiAddressClient) (*rpc.GetResponseReader, error) { var getStream *rpc.GetResponseReader err := c.RawForAddress(ctx, addr, func(cli *rpcclient.Client) error { var e error getStream, e = rpc.GetObject(cli, f.Request, rpcclient.WithContext(ctx)) return e }) if err != nil { return nil, errStreamOpenningFailed(err) } return getStream, nil } func (f *getRequestForwarder) readStream(ctx context.Context, c client.MultiAddressClient, getStream *rpc.GetResponseReader, pubkey []byte) error { var ( headWas bool resp = new(objectV2.GetResponse) localProgress int ) for { // receive message from server stream err := getStream.Read(resp) if err != nil { if errors.Is(err, io.EOF) { if !headWas { return io.ErrUnexpectedEOF } break } internalclient.ReportError(c, err) return errReadingResponseFailed(err) } if err := f.verifyResponse(resp, pubkey); err != nil { return err } switch v := resp.GetBody().GetObjectPart().(type) { default: return errUnexpectedObjectPart(v) case *objectV2.GetObjectPartInit: if headWas { return errWrongMessageSeq } headWas = true if err := f.writeHeader(ctx, v); err != nil { return err } case *objectV2.GetObjectPartChunk: if !headWas { return errWrongMessageSeq } origChunk := v.GetChunk() chunk := chunkToSend(f.GlobalProgress, localProgress, origChunk) if len(chunk) == 0 { localProgress += len(origChunk) continue } if err = f.Stream.WriteChunk(ctx, chunk); err != nil { return errCouldNotWriteObjChunk("Get", err) } localProgress += len(origChunk) f.GlobalProgress += len(chunk) case *objectV2.SplitInfo: si := object.NewSplitInfoFromV2(v) return object.NewSplitInfoError(si) } } return nil }