frostfs-node/pkg/services/object/get/v2/get_range_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/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-observability/tracing"
objectSDK "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) (*objectSDK.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 errCouldNotVerifyRangeResponse(resp, err)
}
return checkStatus(resp.GetMetaHeader().GetStatus())
}
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, errCouldNotCreateGetRangeStream(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 errReadingResponseFailed(err)
}
if err := f.verifyResponse(resp, pubkey); err != nil {
return err
}
switch v := resp.GetBody().GetRangePart().(type) {
case nil:
return errUnexpectedRangePart(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 errCouldNotWriteObjChunk("GetRange", err)
}
localProgress += len(origChunk)
f.GlobalProgress += len(chunk)
case *objectV2.SplitInfo:
si := objectSDK.NewSplitInfoFromV2(v)
return objectSDK.NewSplitInfoError(si)
case *objectV2.ECInfo:
ei := objectSDK.NewECInfoFromV2(v)
return objectSDK.NewECInfoError(ei)
}
}
return nil
}