88 lines
2.3 KiB
Go
88 lines
2.3 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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transferapi "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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tstreaming "github.com/containerd/containerd/pkg/transfer/streaming"
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"github.com/containerd/typeurl"
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)
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// NewImageImportStream returns a image importer via tar stream
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// TODO: Add import options
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func NewImageExportStream(stream io.WriteCloser) *ImageExportStream {
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return &ImageExportStream{
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stream: stream,
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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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}
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func (iis *ImageExportStream) ExportStream(context.Context) (io.WriteCloser, error) {
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return iis.stream, nil
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}
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func (iis *ImageExportStream) MarshalAny(ctx context.Context, sm streaming.StreamManager) (typeurl.Any, error) {
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// TODO: Unique stream ID
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sid := "randomid"
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// TODO: Should this API be create instead of get
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stream, err := sm.Get(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 := &transferapi.ImageExportStream{
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Stream: sid,
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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.StreamManager, any typeurl.Any) error {
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var s transferapi.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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return err
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}
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r, w := io.Pipe()
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tstreaming.SendStream(ctx, r, stream)
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iis.stream = w
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return nil
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}
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