[#248] object: Introduce object patcher
Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>
This commit is contained in:
parent
895a2ef0e2
commit
8b21c804df
1 changed files with 238 additions and 0 deletions
238
client/object_patch.go
Normal file
238
client/object_patch.go
Normal file
|
|
@ -0,0 +1,238 @@
|
|||
package client
|
||||
|
||||
import (
|
||||
"context"
|
||||
"crypto/ecdsa"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/acl"
|
||||
v2object "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
|
||||
rpcapi "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
|
||||
v2session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
|
||||
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
|
||||
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
|
||||
)
|
||||
|
||||
// ObjectPatcher is designed to patch an object.
|
||||
//
|
||||
// Must be initialized using Client.ObjectPatchInit, any other
|
||||
// usage is unsafe.
|
||||
type ObjectPatcher interface {
|
||||
// Patch patches the object.
|
||||
//
|
||||
// If object.Patch parameter sets `NewAttributes`, `ReplaceAttributes` or both fields, then the
|
||||
// request is taken for patching the object's attributes. Attributes can be patched no more than once,
|
||||
// otherwise, the server returns an error.
|
||||
//
|
||||
// If object.Patch parameter sets `PayloadPatch` with a large `Chunk`, then this patch is splitted
|
||||
// into a few patches. After split each `PayloadPatch` has a `Chunk` with the size <= `MaxChunkLength`.
|
||||
//
|
||||
// Result means success. Failure reason can be received via Close.
|
||||
Patch(_ context.Context, patch *object.Patch) bool
|
||||
// Close ends patching the object and returns the result of the operation
|
||||
// along with the final results. Must be called after using the ObjectPatcher.
|
||||
//
|
||||
// Exactly one return value is non-nil. By default, server status is returned in res structure.
|
||||
// Any client's internal or transport errors are returned as Go built-in error.
|
||||
// If Client is tuned to resolve FrostFS API statuses, then FrostFS failures
|
||||
// codes are returned as error.
|
||||
//
|
||||
// Return statuses:
|
||||
// - global (see Client docs);
|
||||
// - *apistatus.ContainerNotFound;
|
||||
// - *apistatus.ContainerAccessDenied;
|
||||
// - *apistatus.ObjectAccessDenied;
|
||||
// - *apistatus.ObjectAlreadyRemoved;
|
||||
// - *apistatus.ObjectLocked;
|
||||
// - *apistatus.ObjectOutOfRange;
|
||||
// - *apistatus.SessionTokenNotFound;
|
||||
// - *apistatus.SessionTokenExpired.
|
||||
Close(_ context.Context) (*ResObjectPatch, error)
|
||||
}
|
||||
|
||||
// ResObjectPatch groups resulting values of ObjectPatch operation.
|
||||
type ResObjectPatch struct {
|
||||
statusRes
|
||||
|
||||
obj oid.ID
|
||||
}
|
||||
|
||||
// ObjectID returns an object ID of the patched object.
|
||||
func (r ResObjectPatch) ObjectID() oid.ID {
|
||||
return r.obj
|
||||
}
|
||||
|
||||
// PrmObjectPatch groups parameters of ObjectPatch operation.
|
||||
type PrmObjectPatch struct {
|
||||
XHeaders []string
|
||||
|
||||
BearerToken *bearer.Token
|
||||
|
||||
Session *session.Object
|
||||
|
||||
Key *ecdsa.PrivateKey
|
||||
|
||||
MaxChunkLength int
|
||||
}
|
||||
|
||||
// ObjectPatchInit initializes object patcher.
|
||||
func (c *Client) ObjectPatchInit(ctx context.Context, prm PrmObjectPatch) (ObjectPatcher, error) {
|
||||
if len(prm.XHeaders)%2 != 0 {
|
||||
return nil, errorInvalidXHeaders
|
||||
}
|
||||
|
||||
var objectPatcher objectPatcher
|
||||
stream, err := rpcapi.Patch(&c.c, &objectPatcher.respV2, client.WithContext(ctx))
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("open stream: %w", err)
|
||||
}
|
||||
|
||||
objectPatcher.key = &c.prm.Key
|
||||
if prm.Key != nil {
|
||||
objectPatcher.key = prm.Key
|
||||
}
|
||||
objectPatcher.client = c
|
||||
objectPatcher.stream = stream
|
||||
|
||||
if prm.MaxChunkLength > 0 {
|
||||
objectPatcher.maxChunkLen = prm.MaxChunkLength
|
||||
} else {
|
||||
objectPatcher.maxChunkLen = defaultGRPCPayloadChunkLen
|
||||
}
|
||||
|
||||
objectPatcher.req.SetBody(&v2object.PatchRequestBody{})
|
||||
|
||||
meta := new(v2session.RequestMetaHeader)
|
||||
writeXHeadersToMeta(prm.XHeaders, meta)
|
||||
|
||||
if prm.BearerToken != nil {
|
||||
v2BearerToken := new(acl.BearerToken)
|
||||
prm.BearerToken.WriteToV2(v2BearerToken)
|
||||
meta.SetBearerToken(v2BearerToken)
|
||||
}
|
||||
|
||||
if prm.Session != nil {
|
||||
v2SessionToken := new(v2session.Token)
|
||||
prm.Session.WriteToV2(v2SessionToken)
|
||||
meta.SetSessionToken(v2SessionToken)
|
||||
}
|
||||
|
||||
c.prepareRequest(&objectPatcher.req, meta)
|
||||
|
||||
return &objectPatcher, nil
|
||||
}
|
||||
|
||||
type objectPatcher struct {
|
||||
client *Client
|
||||
|
||||
stream interface {
|
||||
Write(*v2object.PatchRequest) error
|
||||
Close() error
|
||||
}
|
||||
|
||||
key *ecdsa.PrivateKey
|
||||
res ResObjectPatch
|
||||
err error
|
||||
|
||||
req v2object.PatchRequest
|
||||
respV2 v2object.PatchResponse
|
||||
|
||||
maxChunkLen int
|
||||
}
|
||||
|
||||
func (x *objectPatcher) Patch(_ context.Context, patch *object.Patch) bool {
|
||||
if patch == nil {
|
||||
x.err = errors.New("nil patch")
|
||||
return false
|
||||
}
|
||||
|
||||
patches := []*object.Patch{patch}
|
||||
if patch.PayloadPatch != nil && len(patch.PayloadPatch.Chunk) > x.maxChunkLen {
|
||||
patches = x.splitPatch(patch)
|
||||
}
|
||||
|
||||
for _, p := range patches {
|
||||
if !x.send(p) {
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
// splitPatch splits Patch into a few ones if the original Patch has a large PayloadPatch that is required to be splitted.
|
||||
func (x *objectPatcher) splitPatch(patch *object.Patch) []*object.Patch {
|
||||
splitted := patch.PayloadPatch.SplitByMaxChunkLength(x.maxChunkLen)
|
||||
result := make([]*object.Patch, len(splitted))
|
||||
|
||||
for i, pp := range splitted {
|
||||
result[i] = &object.Patch{
|
||||
Address: patch.Address,
|
||||
PayloadPatch: pp,
|
||||
}
|
||||
}
|
||||
|
||||
if len(result) > 0 {
|
||||
result[0].NewAttributes = patch.NewAttributes
|
||||
result[0].ReplaceAttributes = patch.ReplaceAttributes
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
func (x *objectPatcher) send(patch *object.Patch) bool {
|
||||
x.req.SetBody(patch.ToV2())
|
||||
x.req.SetVerificationHeader(nil)
|
||||
|
||||
x.err = signature.SignServiceMessage(x.key, &x.req)
|
||||
if x.err != nil {
|
||||
x.err = fmt.Errorf("sign message: %w", x.err)
|
||||
return false
|
||||
}
|
||||
|
||||
x.err = x.stream.Write(&x.req)
|
||||
return x.err == nil
|
||||
}
|
||||
|
||||
func (x *objectPatcher) Close(_ context.Context) (*ResObjectPatch, error) {
|
||||
// Ignore io.EOF error, because it is expected error for client-side
|
||||
// stream termination by the server. E.g. when stream contains invalid
|
||||
// message. Server returns an error in response message (in status).
|
||||
if x.err != nil && !errors.Is(x.err, io.EOF) {
|
||||
return nil, x.err
|
||||
}
|
||||
|
||||
if x.err = x.stream.Close(); x.err != nil {
|
||||
return nil, x.err
|
||||
}
|
||||
|
||||
x.res.st, x.err = x.client.processResponse(&x.respV2)
|
||||
if x.err != nil {
|
||||
return nil, x.err
|
||||
}
|
||||
|
||||
if !apistatus.IsSuccessful(x.res.st) {
|
||||
return &x.res, nil
|
||||
}
|
||||
|
||||
const fieldID = "ID"
|
||||
|
||||
idV2 := x.respV2.Body.ObjectID
|
||||
if idV2 == nil {
|
||||
return nil, newErrMissingResponseField(fieldID)
|
||||
}
|
||||
|
||||
x.err = x.res.obj.ReadFromV2(*idV2)
|
||||
if x.err != nil {
|
||||
x.err = newErrInvalidResponseField(fieldID, x.err)
|
||||
}
|
||||
|
||||
return &x.res, nil
|
||||
}
|
||||
Loading…
Reference in a new issue