131 lines
3.6 KiB
Go
131 lines
3.6 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package proxy
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import (
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"context"
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"errors"
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"io"
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"google.golang.org/protobuf/types/known/anypb"
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transferapi "github.com/containerd/containerd/v2/api/services/transfer/v1"
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transfertypes "github.com/containerd/containerd/v2/api/types/transfer"
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"github.com/containerd/containerd/v2/pkg/oci"
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"github.com/containerd/containerd/v2/pkg/streaming"
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"github.com/containerd/containerd/v2/pkg/transfer"
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tstreaming "github.com/containerd/containerd/v2/pkg/transfer/streaming"
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"github.com/containerd/log"
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"github.com/containerd/typeurl/v2"
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ocispec "github.com/opencontainers/image-spec/specs-go/v1"
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)
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type proxyTransferrer struct {
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client transferapi.TransferClient
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streamCreator streaming.StreamCreator
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}
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// NewTransferrer returns a new transferrer which communicates over a GRPC
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// connection using the containerd transfer API
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func NewTransferrer(client transferapi.TransferClient, sc streaming.StreamCreator) transfer.Transferrer {
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return &proxyTransferrer{
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client: client,
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streamCreator: sc,
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}
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}
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func (p *proxyTransferrer) Transfer(ctx context.Context, src interface{}, dst interface{}, opts ...transfer.Opt) error {
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o := &transfer.Config{}
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for _, opt := range opts {
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opt(o)
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}
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apiOpts := &transferapi.TransferOptions{}
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if o.Progress != nil {
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sid := tstreaming.GenerateID("progress")
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stream, err := p.streamCreator.Create(ctx, sid)
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if err != nil {
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return err
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}
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apiOpts.ProgressStream = sid
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go func() {
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for {
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a, err := stream.Recv()
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if err != nil {
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if !errors.Is(err, io.EOF) {
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log.G(ctx).WithError(err).Error("progress stream failed to recv")
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}
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return
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}
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i, err := typeurl.UnmarshalAny(a)
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if err != nil {
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log.G(ctx).WithError(err).Warnf("failed to unmarshal progress object: %v", a.GetTypeUrl())
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}
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switch v := i.(type) {
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case *transfertypes.Progress:
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var descp *ocispec.Descriptor
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if v.Desc != nil {
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desc := oci.DescriptorFromProto(v.Desc)
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descp = &desc
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}
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o.Progress(transfer.Progress{
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Event: v.Event,
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Name: v.Name,
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Parents: v.Parents,
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Progress: v.Progress,
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Total: v.Total,
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Desc: descp,
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})
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default:
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log.G(ctx).Warnf("unhandled progress object %T: %v", i, a.GetTypeUrl())
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}
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}
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}()
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}
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asrc, err := p.marshalAny(ctx, src)
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if err != nil {
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return err
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}
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adst, err := p.marshalAny(ctx, dst)
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if err != nil {
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return err
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}
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req := &transferapi.TransferRequest{
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Source: &anypb.Any{
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TypeUrl: asrc.GetTypeUrl(),
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Value: asrc.GetValue(),
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},
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Destination: &anypb.Any{
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TypeUrl: adst.GetTypeUrl(),
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Value: adst.GetValue(),
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},
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Options: apiOpts,
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}
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_, err = p.client.Transfer(ctx, req)
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return err
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}
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func (p *proxyTransferrer) marshalAny(ctx context.Context, i interface{}) (typeurl.Any, error) {
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switch m := i.(type) {
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case streamMarshaler:
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return m.MarshalAny(ctx, p.streamCreator)
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}
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return typeurl.MarshalAny(i)
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}
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type streamMarshaler interface {
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MarshalAny(context.Context, streaming.StreamCreator) (typeurl.Any, error)
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}
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