frostfs-node/pkg/services/object/get/v2/get_forwarder.go

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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
}