95 lines
2.7 KiB
Go
95 lines
2.7 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 archive
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import (
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"context"
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"io"
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transfertypes "github.com/containerd/containerd/api/types/transfer"
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"github.com/containerd/containerd/log"
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"github.com/containerd/containerd/pkg/streaming"
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"github.com/containerd/containerd/pkg/transfer/plugins"
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tstreaming "github.com/containerd/containerd/pkg/transfer/streaming"
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"github.com/containerd/typeurl"
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)
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func init() {
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// TODO: Move this to separate package?
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plugins.Register(&transfertypes.ImageExportStream{}, &ImageExportStream{})
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plugins.Register(&transfertypes.ImageImportStream{}, &ImageImportStream{})
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}
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// NewImageExportStream returns a image importer via tar stream
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// TODO: Add export options
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func NewImageExportStream(stream io.WriteCloser, mediaType string) *ImageExportStream {
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return &ImageExportStream{
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stream: stream,
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mediaType: mediaType,
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}
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}
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type ImageExportStream struct {
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stream io.WriteCloser
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mediaType string
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}
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func (iis *ImageExportStream) ExportStream(context.Context) (io.WriteCloser, string, error) {
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return iis.stream, iis.mediaType, nil
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}
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func (iis *ImageExportStream) MarshalAny(ctx context.Context, sm streaming.StreamCreator) (typeurl.Any, error) {
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sid := tstreaming.GenerateID("export")
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stream, err := sm.Create(ctx, sid)
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if err != nil {
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return nil, err
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}
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// Receive stream and copy to writer
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go func() {
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if _, err := io.Copy(iis.stream, tstreaming.ReceiveStream(ctx, stream)); err != nil {
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log.G(ctx).WithError(err).WithField("streamid", sid).Errorf("error copying stream")
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}
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iis.stream.Close()
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}()
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s := &transfertypes.ImageExportStream{
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Stream: sid,
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MediaType: iis.mediaType,
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}
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return typeurl.MarshalAny(s)
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}
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func (iis *ImageExportStream) UnmarshalAny(ctx context.Context, sm streaming.StreamGetter, any typeurl.Any) error {
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var s transfertypes.ImageExportStream
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if err := typeurl.UnmarshalTo(any, &s); err != nil {
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return err
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}
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stream, err := sm.Get(ctx, s.Stream)
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if err != nil {
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log.G(ctx).WithError(err).WithField("stream", s.Stream).Debug("failed to get export stream")
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return err
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}
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iis.stream = tstreaming.WriteByteStream(ctx, stream)
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iis.mediaType = s.MediaType
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return nil
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}
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