forked from TrueCloudLab/frostfs-node
[#291] object: Use PayloadSizeLimiter from SDK
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
This commit is contained in:
parent
35ea207df6
commit
b2ffd7df53
11 changed files with 23 additions and 597 deletions
2
go.mod
2
go.mod
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@ -5,7 +5,7 @@ go 1.18
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require (
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git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230418080822-bd44a3f47b85
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git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb
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git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230418145405-db5b89496d68
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git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230503082209-d4fe9a193d1a
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git.frostfs.info/TrueCloudLab/hrw v1.2.0
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git.frostfs.info/TrueCloudLab/tzhash v1.8.0
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github.com/cheggaaa/pb v1.0.29
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BIN
go.sum
BIN
go.sum
Binary file not shown.
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@ -10,10 +10,10 @@ import (
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
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svcutil "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/transformer"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
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"go.uber.org/zap"
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)
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@ -206,8 +206,9 @@ func (t *distributedTarget) iteratePlacement(ctx context.Context) (*transformer.
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id, _ = t.obj.ID()
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return new(transformer.AccessIdentifiers).
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WithSelfID(id), nil
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return &transformer.AccessIdentifiers{
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SelfID: id,
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}, nil
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}
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func (t *distributedTarget) iterateAddresses(ctx context.Context, traverser *placement.Traverser, addrs []placement.Node, resErr *atomic.Value) bool {
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@ -5,9 +5,9 @@ import (
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"fmt"
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objectCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/transformer"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
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)
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// ObjectStorage is an object storage interface.
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@ -61,6 +61,7 @@ func (t *localTarget) Close(ctx context.Context) (*transformer.AccessIdentifiers
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id, _ := t.obj.ID()
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return new(transformer.AccessIdentifiers).
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WithSelfID(id), nil
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return &transformer.AccessIdentifiers{
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SelfID: id,
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}, nil
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}
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@ -10,9 +10,9 @@ import (
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objectcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
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internalclient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal/client"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/transformer"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
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)
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type remoteTarget struct {
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@ -68,8 +68,7 @@ func (t *remoteTarget) Close(ctx context.Context) (*transformer.AccessIdentifier
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return nil, fmt.Errorf("(%T) could not put object to %s: %w", t, t.nodeInfo.AddressGroup(), err)
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}
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return new(transformer.AccessIdentifiers).
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WithSelfID(res.ID()), nil
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return &transformer.AccessIdentifiers{SelfID: res.ID()}, nil
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}
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// NewRemoteSender creates, initializes and returns new RemoteSender instance.
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@ -10,9 +10,9 @@ import (
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/transformer"
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containerSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
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)
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@ -126,18 +126,14 @@ func (p *Streamer) initTrustedTarget(prm *PutInitPrm) error {
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p.sessionKey = sessionKey
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p.target = &validatingTarget{
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fmt: p.fmtValidator,
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nextTarget: transformer.NewPayloadSizeLimiter(
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p.maxPayloadSz,
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containerSDK.IsHomomorphicHashingDisabled(prm.cnr),
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func() transformer.ObjectTarget {
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return transformer.NewFormatTarget(&transformer.FormatterParams{
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Key: sessionKey,
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NextTarget: p.newCommonTarget(prm),
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SessionToken: sToken,
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NetworkState: p.networkState,
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})
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},
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),
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nextTarget: transformer.NewPayloadSizeLimiter(transformer.Params{
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Key: sessionKey,
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NextTargetInit: func() transformer.ObjectTarget { return p.newCommonTarget(prm) },
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NetworkState: p.networkState,
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MaxSize: p.maxPayloadSz,
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WithoutHomomorphicHash: containerSDK.IsHomomorphicHashingDisabled(prm.cnr),
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SessionToken: sToken,
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}),
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}
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return nil
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@ -273,7 +269,7 @@ func (p *Streamer) Close(ctx context.Context) (*PutResponse, error) {
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return nil, fmt.Errorf("(%T) could not close object target: %w", p, err)
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}
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id := ids.ParentID()
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id := ids.ParentID
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if id != nil {
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return &PutResponse{
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id: *id,
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@ -281,6 +277,6 @@ func (p *Streamer) Close(ctx context.Context) (*PutResponse, error) {
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}
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return &PutResponse{
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id: ids.SelfID(),
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id: ids.SelfID,
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}, nil
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}
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@ -9,9 +9,9 @@ import (
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"hash"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/transformer"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer"
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"git.frostfs.info/TrueCloudLab/tzhash/tz"
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)
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@ -1,114 +0,0 @@
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package transformer
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import (
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"context"
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"crypto/ecdsa"
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"fmt"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/version"
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)
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type formatter struct {
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prm *FormatterParams
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obj *object.Object
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sz uint64
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}
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// FormatterParams groups NewFormatTarget parameters.
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type FormatterParams struct {
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Key *ecdsa.PrivateKey
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NextTarget ObjectTarget
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SessionToken *session.Object
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NetworkState netmap.State
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}
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// NewFormatTarget returns ObjectTarget instance that finalizes object structure
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// and writes it to the next target.
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//
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// Chunks must be written before the WriteHeader call.
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//
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// Object changes:
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// - sets version to current SDK version;
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// - sets payload size to the total length of all written chunks;
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// - sets session token;
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// - sets number of creation epoch;
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// - calculates and sets verification fields (ID, Signature).
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func NewFormatTarget(p *FormatterParams) ObjectTarget {
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return &formatter{
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prm: p,
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}
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}
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func (f *formatter) WriteHeader(_ context.Context, obj *object.Object) error {
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f.obj = obj
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return nil
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}
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func (f *formatter) Write(ctx context.Context, p []byte) (n int, err error) {
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n, err = f.prm.NextTarget.Write(ctx, p)
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f.sz += uint64(n)
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return
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}
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func (f *formatter) Close(ctx context.Context) (*AccessIdentifiers, error) {
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curEpoch := f.prm.NetworkState.CurrentEpoch()
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ver := version.Current()
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f.obj.SetVersion(&ver)
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f.obj.SetPayloadSize(f.sz)
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f.obj.SetSessionToken(f.prm.SessionToken)
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f.obj.SetCreationEpoch(curEpoch)
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var (
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parID *oid.ID
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parHdr *object.Object
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)
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if par := f.obj.Parent(); par != nil && par.Signature() == nil {
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rawPar := object.NewFromV2(par.ToV2())
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rawPar.SetSessionToken(f.prm.SessionToken)
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rawPar.SetCreationEpoch(curEpoch)
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if err := object.SetIDWithSignature(*f.prm.Key, rawPar); err != nil {
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return nil, fmt.Errorf("could not finalize parent object: %w", err)
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}
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id, _ := rawPar.ID()
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parID = &id
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parHdr = rawPar
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f.obj.SetParent(parHdr)
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}
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if err := object.SetIDWithSignature(*f.prm.Key, f.obj); err != nil {
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return nil, fmt.Errorf("could not finalize object: %w", err)
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}
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if err := f.prm.NextTarget.WriteHeader(ctx, f.obj); err != nil {
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return nil, fmt.Errorf("could not write header to next target: %w", err)
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}
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if _, err := f.prm.NextTarget.Close(ctx); err != nil {
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return nil, fmt.Errorf("could not close next target: %w", err)
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}
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id, _ := f.obj.ID()
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return new(AccessIdentifiers).
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WithSelfID(id).
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WithParentID(parID).
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WithParent(parHdr), nil
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}
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@ -1,294 +0,0 @@
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package transformer
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import (
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"context"
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"crypto/sha256"
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"fmt"
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"hash"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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"git.frostfs.info/TrueCloudLab/tzhash/tz"
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)
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type payloadSizeLimiter struct {
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maxSize, written uint64
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withoutHomomorphicHash bool
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targetInit func() ObjectTarget
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target ObjectTarget
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current, parent *object.Object
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currentHashers, parentHashers []*payloadChecksumHasher
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previous []oid.ID
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chunkWriter writer
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splitID *object.SplitID
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parAttrs []object.Attribute
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}
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type payloadChecksumHasher struct {
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hasher hash.Hash
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checksumWriter func([]byte)
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}
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// NewPayloadSizeLimiter returns ObjectTarget instance that restricts payload length
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// of the writing object and writes generated objects to targets from initializer.
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//
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// Calculates and adds homomorphic hash to resulting objects only if withoutHomomorphicHash
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// is false.
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//
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// Objects w/ payload size less or equal than max size remain untouched.
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func NewPayloadSizeLimiter(maxSize uint64, withoutHomomorphicHash bool, targetInit TargetInitializer) ObjectTarget {
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return &payloadSizeLimiter{
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maxSize: maxSize,
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withoutHomomorphicHash: withoutHomomorphicHash,
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targetInit: targetInit,
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splitID: object.NewSplitID(),
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}
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}
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func (s *payloadSizeLimiter) WriteHeader(_ context.Context, hdr *object.Object) error {
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s.current = fromObject(hdr)
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s.initialize()
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return nil
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}
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func (s *payloadSizeLimiter) Write(ctx context.Context, p []byte) (int, error) {
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if err := s.writeChunk(ctx, p); err != nil {
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return 0, err
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}
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return len(p), nil
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}
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func (s *payloadSizeLimiter) Close(ctx context.Context) (*AccessIdentifiers, error) {
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return s.release(ctx, true)
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}
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func (s *payloadSizeLimiter) initialize() {
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// if it is an object after the 1st
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if ln := len(s.previous); ln > 0 {
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// initialize parent object once (after 1st object)
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if ln == 1 {
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s.detachParent()
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}
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// set previous object to the last previous identifier
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s.current.SetPreviousID(s.previous[ln-1])
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}
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s.initializeCurrent()
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}
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func fromObject(obj *object.Object) *object.Object {
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cnr, _ := obj.ContainerID()
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res := object.New()
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res.SetContainerID(cnr)
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res.SetOwnerID(obj.OwnerID())
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res.SetAttributes(obj.Attributes()...)
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res.SetType(obj.Type())
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// obj.SetSplitID creates splitHeader but we don't need to do it in case
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// of small objects, so we should make nil check.
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if obj.SplitID() != nil {
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res.SetSplitID(obj.SplitID())
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}
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return res
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}
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func (s *payloadSizeLimiter) initializeCurrent() {
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// initialize current object target
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s.target = s.targetInit()
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// create payload hashers
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s.currentHashers = payloadHashersForObject(s.current, s.withoutHomomorphicHash)
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// compose multi-writer from target and all payload hashers
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ws := make([]writer, 0, 1+len(s.currentHashers)+len(s.parentHashers))
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ws = append(ws, s.target)
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for i := range s.currentHashers {
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ws = append(ws, newWriter(s.currentHashers[i].hasher))
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}
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for i := range s.parentHashers {
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ws = append(ws, newWriter(s.parentHashers[i].hasher))
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}
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s.chunkWriter = newMultiWriter(ws...)
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}
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func payloadHashersForObject(obj *object.Object, withoutHomomorphicHash bool) []*payloadChecksumHasher {
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hashers := make([]*payloadChecksumHasher, 0, 2)
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hashers = append(hashers, &payloadChecksumHasher{
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hasher: sha256.New(),
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checksumWriter: func(binChecksum []byte) {
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if ln := len(binChecksum); ln != sha256.Size {
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panic(fmt.Sprintf("wrong checksum length: expected %d, has %d", sha256.Size, ln))
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}
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csSHA := [sha256.Size]byte{}
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copy(csSHA[:], binChecksum)
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var cs checksum.Checksum
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cs.SetSHA256(csSHA)
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obj.SetPayloadChecksum(cs)
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},
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})
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if !withoutHomomorphicHash {
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hashers = append(hashers, &payloadChecksumHasher{
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hasher: tz.New(),
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checksumWriter: func(binChecksum []byte) {
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if ln := len(binChecksum); ln != tz.Size {
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panic(fmt.Sprintf("wrong checksum length: expected %d, has %d", tz.Size, ln))
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}
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csTZ := [tz.Size]byte{}
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copy(csTZ[:], binChecksum)
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var cs checksum.Checksum
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cs.SetTillichZemor(csTZ)
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obj.SetPayloadHomomorphicHash(cs)
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},
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})
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}
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return hashers
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}
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func (s *payloadSizeLimiter) release(ctx context.Context, finalize bool) (*AccessIdentifiers, error) {
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// Arg finalize is true only when called from Close method.
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// We finalize parent and generate linking objects only if it is more
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// than 1 object in split-chain.
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withParent := finalize && len(s.previous) > 0
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if withParent {
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writeHashes(s.parentHashers)
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s.parent.SetPayloadSize(s.written)
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s.current.SetParent(s.parent)
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}
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// release current object
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writeHashes(s.currentHashers)
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|
||||
// release current, get its id
|
||||
if err := s.target.WriteHeader(ctx, s.current); err != nil {
|
||||
return nil, fmt.Errorf("could not write header: %w", err)
|
||||
}
|
||||
|
||||
ids, err := s.target.Close(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("could not close target: %w", err)
|
||||
}
|
||||
|
||||
// save identifier of the released object
|
||||
s.previous = append(s.previous, ids.SelfID())
|
||||
|
||||
if withParent {
|
||||
// generate and release linking object
|
||||
s.initializeLinking(ids.Parent())
|
||||
s.initializeCurrent()
|
||||
|
||||
if _, err := s.release(ctx, false); err != nil {
|
||||
return nil, fmt.Errorf("could not release linking object: %w", err)
|
||||
}
|
||||
}
|
||||
|
||||
return ids, nil
|
||||
}
|
||||
|
||||
func writeHashes(hashers []*payloadChecksumHasher) {
|
||||
for i := range hashers {
|
||||
hashers[i].checksumWriter(hashers[i].hasher.Sum(nil))
|
||||
}
|
||||
}
|
||||
|
||||
func (s *payloadSizeLimiter) initializeLinking(parHdr *object.Object) {
|
||||
s.current = fromObject(s.current)
|
||||
s.current.SetParent(parHdr)
|
||||
s.current.SetChildren(s.previous...)
|
||||
s.current.SetSplitID(s.splitID)
|
||||
}
|
||||
|
||||
func (s *payloadSizeLimiter) writeChunk(ctx context.Context, chunk []byte) error {
|
||||
// statement is true if the previous write of bytes reached exactly the boundary.
|
||||
if s.written > 0 && s.written%s.maxSize == 0 {
|
||||
if s.written == s.maxSize {
|
||||
s.prepareFirstChild()
|
||||
}
|
||||
|
||||
// we need to release current object
|
||||
if _, err := s.release(ctx, false); err != nil {
|
||||
return fmt.Errorf("could not release object: %w", err)
|
||||
}
|
||||
|
||||
// initialize another object
|
||||
s.initialize()
|
||||
}
|
||||
|
||||
var (
|
||||
ln = uint64(len(chunk))
|
||||
cut = ln
|
||||
leftToEdge = s.maxSize - s.written%s.maxSize
|
||||
)
|
||||
|
||||
// write bytes no further than the boundary of the current object
|
||||
if ln > leftToEdge {
|
||||
cut = leftToEdge
|
||||
}
|
||||
|
||||
if _, err := s.chunkWriter.Write(ctx, chunk[:cut]); err != nil {
|
||||
return fmt.Errorf("could not write chunk to target: %w", err)
|
||||
}
|
||||
|
||||
// increase written bytes counter
|
||||
s.written += cut
|
||||
|
||||
// if there are more bytes in buffer we call method again to start filling another object
|
||||
if ln > leftToEdge {
|
||||
return s.writeChunk(ctx, chunk[cut:])
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (s *payloadSizeLimiter) prepareFirstChild() {
|
||||
// initialize split header with split ID on first object in chain
|
||||
s.current.InitRelations()
|
||||
s.current.SetSplitID(s.splitID)
|
||||
|
||||
// cut source attributes
|
||||
s.parAttrs = s.current.Attributes()
|
||||
s.current.SetAttributes()
|
||||
|
||||
// attributes will be added to parent in detachParent
|
||||
}
|
||||
|
||||
func (s *payloadSizeLimiter) detachParent() {
|
||||
s.parent = s.current
|
||||
s.current = fromObject(s.parent)
|
||||
s.parent.ResetRelations()
|
||||
s.parent.SetSignature(nil)
|
||||
s.parentHashers = s.currentHashers
|
||||
|
||||
// return source attributes
|
||||
s.parent.SetAttributes(s.parAttrs...)
|
||||
}
|
||||
|
|
@ -1,111 +0,0 @@
|
|||
package transformer
|
||||
|
||||
import (
|
||||
"context"
|
||||
|
||||
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
|
||||
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
|
||||
)
|
||||
|
||||
// AccessIdentifiers represents group of the object identifiers
|
||||
// that are returned after writing the object.
|
||||
// Consists of the ID of the stored object and the ID of the parent object.
|
||||
type AccessIdentifiers struct {
|
||||
par *oid.ID
|
||||
|
||||
self oid.ID
|
||||
|
||||
parHdr *object.Object
|
||||
}
|
||||
|
||||
// ObjectTarget is an interface of the object writer.
|
||||
type ObjectTarget interface {
|
||||
// WriteHeader writes object header w/ payload part.
|
||||
// The payload of the object may be incomplete.
|
||||
//
|
||||
// Must be called exactly once. Control remains with the caller.
|
||||
// Missing a call or re-calling can lead to undefined behavior
|
||||
// that depends on the implementation.
|
||||
//
|
||||
// Must not be called after Close call.
|
||||
WriteHeader(context.Context, *object.Object) error
|
||||
|
||||
// Write writes object payload chunk.
|
||||
//
|
||||
// Can be called multiple times.
|
||||
//
|
||||
// Must not be called after Close call.
|
||||
Write(ctx context.Context, p []byte) (n int, err error)
|
||||
|
||||
// Close is used to finish object writing.
|
||||
//
|
||||
// Close must return access identifiers of the object
|
||||
// that has been written.
|
||||
//
|
||||
// Must be called no more than once. Control remains with the caller.
|
||||
// Re-calling can lead to undefined behavior
|
||||
// that depends on the implementation.
|
||||
Close(ctx context.Context) (*AccessIdentifiers, error)
|
||||
}
|
||||
|
||||
// TargetInitializer represents ObjectTarget constructor.
|
||||
type TargetInitializer func() ObjectTarget
|
||||
|
||||
// SelfID returns identifier of the written object.
|
||||
func (a AccessIdentifiers) SelfID() oid.ID {
|
||||
return a.self
|
||||
}
|
||||
|
||||
// WithSelfID returns AccessIdentifiers with passed self identifier.
|
||||
func (a *AccessIdentifiers) WithSelfID(v oid.ID) *AccessIdentifiers {
|
||||
res := a
|
||||
if res == nil {
|
||||
res = new(AccessIdentifiers)
|
||||
}
|
||||
|
||||
res.self = v
|
||||
|
||||
return res
|
||||
}
|
||||
|
||||
// ParentID return identifier of the parent of the written object.
|
||||
func (a *AccessIdentifiers) ParentID() *oid.ID {
|
||||
if a != nil {
|
||||
return a.par
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// WithParentID returns AccessIdentifiers with passed parent identifier.
|
||||
func (a *AccessIdentifiers) WithParentID(v *oid.ID) *AccessIdentifiers {
|
||||
res := a
|
||||
if res == nil {
|
||||
res = new(AccessIdentifiers)
|
||||
}
|
||||
|
||||
res.par = v
|
||||
|
||||
return res
|
||||
}
|
||||
|
||||
// Parent return identifier of the parent of the written object.
|
||||
func (a *AccessIdentifiers) Parent() *object.Object {
|
||||
if a != nil {
|
||||
return a.parHdr
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// WithParent returns AccessIdentifiers with passed parent identifier.
|
||||
func (a *AccessIdentifiers) WithParent(v *object.Object) *AccessIdentifiers {
|
||||
res := a
|
||||
if res == nil {
|
||||
res = new(AccessIdentifiers)
|
||||
}
|
||||
|
||||
res.parHdr = v
|
||||
|
||||
return res
|
||||
}
|
||||
|
|
@ -1,52 +0,0 @@
|
|||
package transformer
|
||||
|
||||
import (
|
||||
"context"
|
||||
"io"
|
||||
)
|
||||
|
||||
type writer interface {
|
||||
Write(ctx context.Context, p []byte) (n int, err error)
|
||||
}
|
||||
|
||||
type multiWriter struct {
|
||||
writers []writer
|
||||
}
|
||||
|
||||
func (t *multiWriter) Write(ctx context.Context, p []byte) (n int, err error) {
|
||||
for _, w := range t.writers {
|
||||
n, err = w.Write(ctx, p)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
if n != len(p) {
|
||||
err = io.ErrShortWrite
|
||||
return
|
||||
}
|
||||
}
|
||||
return len(p), nil
|
||||
}
|
||||
|
||||
func newMultiWriter(writers ...writer) writer {
|
||||
allWriters := make([]writer, 0, len(writers))
|
||||
for _, w := range writers {
|
||||
if mw, ok := w.(*multiWriter); ok {
|
||||
allWriters = append(allWriters, mw.writers...)
|
||||
} else {
|
||||
allWriters = append(allWriters, w)
|
||||
}
|
||||
}
|
||||
return &multiWriter{allWriters}
|
||||
}
|
||||
|
||||
type writerWrapper struct {
|
||||
Writer io.Writer
|
||||
}
|
||||
|
||||
func (w *writerWrapper) Write(_ context.Context, p []byte) (n int, err error) {
|
||||
return w.Writer.Write(p)
|
||||
}
|
||||
|
||||
func newWriter(w io.Writer) writer {
|
||||
return &writerWrapper{Writer: w}
|
||||
}
|
||||
Loading…
Reference in a new issue