package getsvc import ( "context" "crypto/ecdsa" "errors" "fmt" "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 getRangeRequestForwarder struct { OnceResign *sync.Once GlobalProgress int Key *ecdsa.PrivateKey Request *objectV2.GetRangeRequest Stream *streamObjectRangeWriter } func (f *getRangeRequestForwarder) forwardRequestToNode(ctx context.Context, addr network.Address, c client.MultiAddressClient, pubkey []byte) (*object.Object, error) { ctx, span := tracing.StartSpanFromContext(ctx, "getRangeRequestForwarder.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 } rangeStream, err := f.openStream(ctx, addr, c) if err != nil { return nil, err } return nil, f.readStream(ctx, rangeStream, c, pubkey) } func (f *getRangeRequestForwarder) verifyResponse(resp *objectV2.GetRangeResponse, 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 fmt.Errorf("could not verify %T: %w", resp, err) } if err := checkStatus(resp.GetMetaHeader().GetStatus()); err != nil { return err } return nil } func (f *getRangeRequestForwarder) openStream(ctx context.Context, addr network.Address, c client.MultiAddressClient) (*rpc.ObjectRangeResponseReader, error) { // open stream var rangeStream *rpc.ObjectRangeResponseReader err := c.RawForAddress(ctx, addr, func(cli *rpcclient.Client) error { var e error rangeStream, e = rpc.GetObjectRange(cli, f.Request, rpcclient.WithContext(ctx)) return e }) if err != nil { return nil, fmt.Errorf("could not create Get payload range stream: %w", err) } return rangeStream, nil } func (f *getRangeRequestForwarder) readStream(ctx context.Context, rangeStream *rpc.ObjectRangeResponseReader, c client.MultiAddressClient, pubkey []byte) error { resp := new(objectV2.GetRangeResponse) var localProgress int for { // receive message from server stream err := rangeStream.Read(resp) if err != nil { if errors.Is(err, io.EOF) { break } internalclient.ReportError(c, err) return fmt.Errorf("reading the response failed: %w", err) } if err := f.verifyResponse(resp, pubkey); err != nil { return err } switch v := resp.GetBody().GetRangePart().(type) { case nil: return fmt.Errorf("unexpected range type %T", v) case *objectV2.GetRangePartChunk: 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 fmt.Errorf("could not write object chunk in GetRange forwarder: %w", err) } localProgress += len(origChunk) f.GlobalProgress += len(chunk) case *objectV2.SplitInfo: si := object.NewSplitInfoFromV2(v) return object.NewSplitInfoError(si) } } return nil }