bbe46b8c43
Signed-off-by: haoyun <yun.hao@daocloud.io> Co-authored-by: zounengren <zouyee1989@gmail.com>
147 lines
3.4 KiB
Go
147 lines
3.4 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package proxy
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
|
|
contentapi "github.com/containerd/containerd/api/services/content/v1"
|
|
"github.com/containerd/containerd/content"
|
|
"github.com/containerd/containerd/errdefs"
|
|
digest "github.com/opencontainers/go-digest"
|
|
)
|
|
|
|
type remoteWriter struct {
|
|
ref string
|
|
client contentapi.Content_WriteClient
|
|
offset int64
|
|
digest digest.Digest
|
|
}
|
|
|
|
// send performs a synchronous req-resp cycle on the client.
|
|
func (rw *remoteWriter) send(req *contentapi.WriteContentRequest) (*contentapi.WriteContentResponse, error) {
|
|
if err := rw.client.Send(req); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
resp, err := rw.client.Recv()
|
|
|
|
if err == nil {
|
|
// try to keep these in sync
|
|
if resp.Digest != "" {
|
|
rw.digest = resp.Digest
|
|
}
|
|
}
|
|
|
|
return resp, err
|
|
}
|
|
|
|
func (rw *remoteWriter) Status() (content.Status, error) {
|
|
resp, err := rw.send(&contentapi.WriteContentRequest{
|
|
Action: contentapi.WriteActionStat,
|
|
})
|
|
if err != nil {
|
|
return content.Status{}, fmt.Errorf("error getting writer status: %w", errdefs.FromGRPC(err))
|
|
}
|
|
|
|
return content.Status{
|
|
Ref: rw.ref,
|
|
Offset: resp.Offset,
|
|
Total: resp.Total,
|
|
StartedAt: resp.StartedAt,
|
|
UpdatedAt: resp.UpdatedAt,
|
|
}, nil
|
|
}
|
|
|
|
func (rw *remoteWriter) Digest() digest.Digest {
|
|
return rw.digest
|
|
}
|
|
|
|
func (rw *remoteWriter) Write(p []byte) (n int, err error) {
|
|
offset := rw.offset
|
|
|
|
resp, err := rw.send(&contentapi.WriteContentRequest{
|
|
Action: contentapi.WriteActionWrite,
|
|
Offset: offset,
|
|
Data: p,
|
|
})
|
|
if err != nil {
|
|
return 0, fmt.Errorf("failed to send write: %w", errdefs.FromGRPC(err))
|
|
}
|
|
|
|
n = int(resp.Offset - offset)
|
|
if n < len(p) {
|
|
err = io.ErrShortWrite
|
|
}
|
|
|
|
rw.offset += int64(n)
|
|
if resp.Digest != "" {
|
|
rw.digest = resp.Digest
|
|
}
|
|
return
|
|
}
|
|
|
|
func (rw *remoteWriter) Commit(ctx context.Context, size int64, expected digest.Digest, opts ...content.Opt) (err error) {
|
|
defer func() {
|
|
err1 := rw.Close()
|
|
if err == nil {
|
|
err = err1
|
|
}
|
|
}()
|
|
|
|
var base content.Info
|
|
for _, opt := range opts {
|
|
if err := opt(&base); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
resp, err := rw.send(&contentapi.WriteContentRequest{
|
|
Action: contentapi.WriteActionCommit,
|
|
Total: size,
|
|
Offset: rw.offset,
|
|
Expected: expected,
|
|
Labels: base.Labels,
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("commit failed: %w", errdefs.FromGRPC(err))
|
|
}
|
|
|
|
if size != 0 && resp.Offset != size {
|
|
return fmt.Errorf("unexpected size: %v != %v", resp.Offset, size)
|
|
}
|
|
|
|
if expected != "" && resp.Digest != expected {
|
|
return fmt.Errorf("unexpected digest: %v != %v", resp.Digest, expected)
|
|
}
|
|
|
|
rw.digest = resp.Digest
|
|
rw.offset = resp.Offset
|
|
return nil
|
|
}
|
|
|
|
func (rw *remoteWriter) Truncate(size int64) error {
|
|
// This truncation won't actually be validated until a write is issued.
|
|
rw.offset = size
|
|
return nil
|
|
}
|
|
|
|
func (rw *remoteWriter) Close() error {
|
|
return rw.client.CloseSend()
|
|
}
|