frostfs-node/pkg/morph/client/container/get.go

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package container
import (
"crypto/sha256"
"fmt"
"strings"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
containerContract "git.frostfs.info/TrueCloudLab/frostfs-contract/container"
containercore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/container"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
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)
type containerSource Client
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func (x *containerSource) Get(cnr cid.ID) (*containercore.Container, error) {
return Get((*Client)(x), cnr)
}
// AsContainerSource provides container Source interface
// from Wrapper instance.
func AsContainerSource(w *Client) containercore.Source {
return (*containerSource)(w)
}
type getContainer interface {
Get(cid []byte) (*containercore.Container, error)
}
// Get marshals container ID, and passes it to Wrapper's Get method.
func Get(c getContainer, cnr cid.ID) (*containercore.Container, error) {
binCnr := make([]byte, sha256.Size)
cnr.Encode(binCnr)
return c.Get(binCnr)
}
// Get reads the container from FrostFS system by binary identifier
// through Container contract call.
//
// If an empty slice is returned for the requested identifier,
// storage.ErrNotFound error is returned.
func (c *Client) Get(cid []byte) (*containercore.Container, error) {
prm := client.TestInvokePrm{}
prm.SetMethod(getMethod)
prm.SetArgs(cid)
res, err := c.client.TestInvoke(prm)
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if err != nil {
if strings.Contains(err.Error(), containerContract.NotFoundError) {
return nil, new(apistatus.ContainerNotFound)
}
return nil, fmt.Errorf("could not perform test invocation (%s): %w", getMethod, err)
} else if ln := len(res); ln != 1 {
return nil, fmt.Errorf("unexpected stack item count (%s): %d", getMethod, ln)
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}
arr, err := client.ArrayFromStackItem(res[0])
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if err != nil {
return nil, fmt.Errorf("could not get item array of container (%s): %w", getMethod, err)
}
if len(arr) != 4 {
return nil, fmt.Errorf("unexpected container stack item count (%s): %d", getMethod, len(arr))
}
cnrBytes, err := client.BytesFromStackItem(arr[0])
if err != nil {
return nil, fmt.Errorf("could not get byte array of container (%s): %w", getMethod, err)
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}
sigBytes, err := client.BytesFromStackItem(arr[1])
if err != nil {
return nil, fmt.Errorf("could not get byte array of container signature (%s): %w", getMethod, err)
}
pub, err := client.BytesFromStackItem(arr[2])
if err != nil {
return nil, fmt.Errorf("could not get byte array of public key (%s): %w", getMethod, err)
}
tokBytes, err := client.BytesFromStackItem(arr[3])
if err != nil {
return nil, fmt.Errorf("could not get byte array of session token (%s): %w", getMethod, err)
}
var cnr containercore.Container
if err := cnr.Value.Unmarshal(cnrBytes); err != nil {
// use other major version if there any
return nil, fmt.Errorf("can't unmarshal container: %w", err)
}
if len(tokBytes) > 0 {
cnr.Session = new(session.Container)
err = cnr.Session.Unmarshal(tokBytes)
if err != nil {
return nil, fmt.Errorf("could not unmarshal session token: %w", err)
}
}
// TODO(@cthulhu-rider): #468 implement and use another approach to avoid conversion
var sigV2 refs.Signature
sigV2.SetKey(pub)
sigV2.SetSign(sigBytes)
sigV2.SetScheme(refs.ECDSA_RFC6979_SHA256)
err = cnr.Signature.ReadFromV2(sigV2)
return &cnr, err
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}