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handler-exec-flat.go
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/
handler-exec-flat.go
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/*
* Copyright (c) 2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package views
import (
"context"
"crypto/md5"
"fmt"
"io"
"strconv"
"strings"
"github.com/micro/go-micro/errors"
"github.com/pydio/cells/common/sync/endpoints/s3"
"go.uber.org/zap"
"github.com/pydio/cells/common/log"
"github.com/micro/go-micro/client"
"github.com/pborman/uuid"
"github.com/pydio/minio-go"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/proto/encryption"
"github.com/pydio/cells/common/proto/object"
"github.com/pydio/cells/common/proto/tree"
"github.com/pydio/cells/common/registry"
context2 "github.com/pydio/cells/common/utils/context"
)
var keyClient encryption.NodeKeyManagerClient
// FlatStorageHandler intercepts request to a flat-storage
type FlatStorageHandler struct {
AbstractHandler
}
// CreateNode creates directly in index, but make sure not to override
func (f *FlatStorageHandler) CreateNode(ctx context.Context, in *tree.CreateNodeRequest, opts ...client.CallOption) (*tree.CreateNodeResponse, error) {
if !isFlatStorage(ctx, "in") || in.GetNode().IsLeaf() {
return f.next.CreateNode(ctx, in, opts...)
}
if r, e := f.next.ReadNode(ctx, &tree.ReadNodeRequest{Node: &tree.Node{Path: in.GetNode().GetPath()}}); e == nil && r.GetNode() != nil {
rNode := r.GetNode()
if rNode.IsLeaf() {
return nil, errors.Forbidden("cannot.override.file", "trying to create a folder on top of an existing file")
}
rNode.SetMeta(common.MetaFlagIndexed, true)
return &tree.CreateNodeResponse{Node: rNode}, nil
}
cResp, cErr := f.clientsPool.GetTreeClientWrite().CreateNode(ctx, in, opts...)
if cErr == nil && cResp.GetNode() != nil {
cResp.GetNode().SetMeta(common.MetaFlagIndexed, true)
}
return cResp, cErr
}
func (f *FlatStorageHandler) DeleteNode(ctx context.Context, in *tree.DeleteNodeRequest, opts ...client.CallOption) (*tree.DeleteNodeResponse, error) {
isFlat := isFlatStorage(ctx, "in")
if isFlat && !in.GetNode().IsLeaf() {
return f.clientsPool.GetTreeClientWrite().DeleteNode(ctx, in)
}
resp, e := f.next.DeleteNode(ctx, in, opts...)
if isFlat && e == nil && resp.Success {
// Update index directly
return f.clientsPool.GetTreeClientWrite().DeleteNode(ctx, in)
}
return resp, e
}
func (f *FlatStorageHandler) GetObject(ctx context.Context, node *tree.Node, requestData *GetRequestData) (io.ReadCloser, error) {
if isFlatStorage(ctx, "in") {
if e := f.resolveUUID(ctx, node); e != nil {
return nil, e
}
}
return f.next.GetObject(ctx, node, requestData)
}
func (f *FlatStorageHandler) CopyObject(ctx context.Context, from *tree.Node, to *tree.Node, requestData *CopyRequestData) (int64, error) {
var revertNode *tree.Node
if isFlatStorage(ctx, "to") {
if len(requestData.SrcVersionId) > 0 {
if e := f.resolveUUID(ctx, to); e != nil {
return 0, e
}
} else {
// Insert in tree as temporary
temporary := to.Clone()
//temporary.Uuid = uuid.New()
if dir, o := requestData.Metadata[common.XAmzMetaDirective]; o && dir == "COPY" { // MOVE CASE = Copy original metadata
temporary.Uuid = from.Uuid
} else if temporary.Uuid == "" || temporary.Uuid == from.Uuid {
temporary.Uuid = uuid.New()
}
temporary.Type = tree.NodeType_LEAF
temporary.Etag = common.NodeFlagEtagTemporary
if ctype := from.GetStringMeta(common.MetaNamespaceMime); ctype != "" {
temporary.SetMeta(common.MetaNamespaceMime, ctype)
}
if _, er := f.clientsPool.GetTreeClientWrite().CreateNode(ctx, &tree.CreateNodeRequest{Node: temporary}); er != nil {
return 0, er
}
// Attach Uuid to target node
to.Uuid = temporary.Uuid
revertNode = temporary
}
}
i, e := f.next.CopyObject(ctx, from, to, requestData)
if e == nil && isFlatStorage(ctx, "to") {
// Create an "in" context with resolver
destInfo, _ := GetBranchInfo(ctx, "to")
tgtCtx := WithBranchInfo(ctx, "in", destInfo)
if requestData.Metadata != nil {
if _, ok := requestData.Metadata[common.XPydioMoveUuid]; ok {
tgtCtx = context2.WithAdditionalMetadata(tgtCtx, requestData.Metadata)
}
}
// Now store in index
if er := f.postCreate(tgtCtx, "to", to, requestData.Metadata, from.GetStringMeta(common.MetaNamespaceMime)); er != nil {
return i, er
}
} else if e != nil && revertNode != nil {
if _, de := f.clientsPool.GetTreeClientWrite().DeleteNode(ctx, &tree.DeleteNodeRequest{Node: revertNode}); de != nil {
log.Logger(ctx).Error("Error while copying object and error while reverting index node", zap.Error(de), revertNode.ZapPath())
} else {
log.Logger(ctx).Warn("Error while copying object, reverted index node", revertNode.ZapPath())
}
}
return i, e
}
func (f *FlatStorageHandler) PutObject(ctx context.Context, node *tree.Node, reader io.Reader, requestData *PutRequestData) (int64, error) {
i, e := f.next.PutObject(ctx, node, reader, requestData)
if e == nil && isFlatStorage(ctx, "in") {
if er := f.postCreate(ctx, "in", node, requestData.Metadata, requestData.MetaContentType()); er != nil {
return i, er
}
}
return i, e
}
func (f *FlatStorageHandler) MultipartPutObjectPart(ctx context.Context, target *tree.Node, uploadID string, partNumberMarker int, reader io.Reader, requestData *PutRequestData) (minio.ObjectPart, error) {
if isFlatStorage(ctx, "in") {
if e := f.resolveUUID(ctx, target); e != nil {
return minio.ObjectPart{}, e
}
}
return f.next.MultipartPutObjectPart(ctx, target, uploadID, partNumberMarker, reader, requestData)
}
func (f *FlatStorageHandler) MultipartComplete(ctx context.Context, target *tree.Node, uploadID string, uploadedParts []minio.CompletePart) (minio.ObjectInfo, error) {
if isFlatStorage(ctx, "in") {
if e := f.resolveUUID(ctx, target); e != nil {
return minio.ObjectInfo{}, e
}
}
info, e := f.next.MultipartComplete(ctx, target, uploadID, uploadedParts)
if e == nil && isFlatStorage(ctx, "in") {
// We assume MultipartCreate has already set the clear-size in the index, otherwise we have to find the correct value
meta := map[string]string{}
if target.Size == 0 {
if branchInfo, ok := GetBranchInfo(ctx, "in"); ok && branchInfo.EncryptionMode != object.EncryptionMode_CLEAR {
if pS, e := f.encPlainSizeRecompute(ctx, target.GetUuid(), branchInfo.Name); e == nil {
// We have to reload the size from encryption service
//fmt.Println("Reading plain size from nodeKey service", pS)
meta[common.XAmzMetaClearSize] = fmt.Sprintf("%d", pS)
}
} else {
//fmt.Println("Setting size from uploaded S3 object", info.Size)
meta[common.XAmzMetaClearSize] = fmt.Sprintf("%d", info.Size)
}
}
if er := f.postCreate(ctx, "in", target, meta, ""); er != nil {
return info, er
}
}
return info, e
}
func (f *FlatStorageHandler) MultipartListObjectParts(ctx context.Context, target *tree.Node, uploadID string, partNumberMarker int, maxParts int) (lpi minio.ListObjectPartsResult, err error) {
if isFlatStorage(ctx, "in") {
if e := f.resolveUUID(ctx, target); e != nil {
return minio.ListObjectPartsResult{}, e
}
}
return f.next.MultipartListObjectParts(ctx, target, uploadID, partNumberMarker, maxParts)
}
func (f *FlatStorageHandler) MultipartAbort(ctx context.Context, target *tree.Node, uploadID string, requestData *MultipartRequestData) error {
if isFlatStorage(ctx, "in") {
if e := f.resolveUUID(ctx, target); e != nil {
return e
}
}
return f.next.MultipartAbort(ctx, target, uploadID, requestData)
}
func isFlatStorage(ctx context.Context, identifier string) bool {
if info, ok := GetBranchInfo(ctx, identifier); ok && info.FlatStorage && !info.Binary {
return true
}
return false
}
func (f *FlatStorageHandler) resolveUUID(ctx context.Context, node *tree.Node) error {
if node.GetUuid() != "" {
return nil
}
if r, e := f.ReadNode(ctx, &tree.ReadNodeRequest{Node: node}); e != nil {
return e
} else {
node.Uuid = r.GetNode().GetUuid()
}
return nil
}
// postCreate updates index after upload by re-read newly added S3 object to get ETag
func (f *FlatStorageHandler) postCreate(ctx context.Context, identifier string, node *tree.Node, requestMeta map[string]string, cType string) error {
var updateNode *tree.Node
if updateResp, err := f.ReadNode(ctx, &tree.ReadNodeRequest{Node: node}); err == nil {
updateNode = updateResp.GetNode()
} else if node.Uuid != "" {
updateNode = node
} else {
return fmt.Errorf("missing uuid info to postCreate node")
}
stats, err := f.ReadNode(ctx, &tree.ReadNodeRequest{Node: node, ObjectStats: true})
if err != nil {
return err
}
updateNode.MTime = stats.GetNode().GetMTime()
updateNode.Size = stats.GetNode().GetSize()
if requestMeta != nil {
if pS, o := requestMeta[common.XAmzMetaClearSize]; o {
if metaSize, e := strconv.ParseInt(pS, 10, 64); e == nil {
updateNode.Size = metaSize
}
}
}
updateNode.Etag = stats.GetNode().GetEtag()
if updateNode.Etag == "" || strings.Contains(updateNode.Etag, "-") {
newETag, e := f.recomputeETag(ctx, identifier, updateNode)
if e == nil {
log.Logger(ctx).Info("Recomputed ETag :" + updateNode.Etag + " => " + newETag)
updateNode.Etag = newETag
} else {
log.Logger(ctx).Error("Cannot recompute ETag :"+updateNode.Etag, zap.Error(e))
}
}
if cType != "" {
updateNode.SetMeta(common.MetaNamespaceMime, cType)
}
_, er := f.clientsPool.GetTreeClientWrite().CreateNode(ctx, &tree.CreateNodeRequest{Node: updateNode, UpdateIfExists: true})
if er != nil {
return er
}
return nil
}
func (f *FlatStorageHandler) recomputeETag(ctx context.Context, identifier string, node *tree.Node) (string, error) {
src, _ := GetBranchInfo(ctx, identifier)
// Init contextual metadata structures
copyMeta := map[string]string{
common.XAmzMetaDirective: "REPLACE",
}
statOpts := minio.StatObjectOptions{}
getOpts := minio.GetObjectOptions{}
if meta, ok := context2.MinioMetaFromContext(ctx); ok {
for k, v := range meta {
statOpts.Set(k, v)
getOpts.Set(k, v)
copyMeta[k] = v
}
}
// Load current metadata
objectInfo, e := src.Client.StatObject(src.ObjectsBucket, node.GetUuid(), statOpts)
if e != nil {
return "", e
}
for k, v := range objectInfo.Metadata {
copyMeta[k] = strings.Join(v, "")
}
if objectInfo.Size > s3.MaxCopyObjectSize && src.StorageType != object.StorageType_LOCAL {
// Cannot CopyObject on itself for files bigger than 5GB - compute Md5 and store it as metadata instead
// Not necessary for real minio on fs (but required for Minio as S3 gateway or real S3)
readCloser, _, e := src.Client.GetObject(src.ObjectsBucket, node.GetUuid(), getOpts)
if e != nil {
return "", e
}
defer readCloser.Close()
h := md5.New()
if _, err := io.Copy(h, readCloser); err != nil {
return "", err
}
checksum := fmt.Sprintf("%x", h.Sum(nil))
copyMeta[common.XAmzMetaContentMd5] = checksum
err := s3.CopyObjectMultipart(context.Background(), src.Client, objectInfo, src.ObjectsBucket, objectInfo.Key, src.ObjectsBucket, objectInfo.Key, copyMeta, nil)
return checksum, err
} else {
// Perform in-place copy to trigger ETag recomputation inside storage
newInfo, copyErr := src.Client.CopyObject(src.ObjectsBucket, objectInfo.Key, src.ObjectsBucket, objectInfo.Key, copyMeta)
if copyErr != nil {
return "", copyErr
}
return newInfo.ETag, nil
}
}
func (f *FlatStorageHandler) encPlainSizeRecompute(ctx context.Context, nodeUUID, dsName string) (int64, error) {
if keyClient == nil {
keyClient = encryption.NewNodeKeyManagerClient(registry.GetClient(common.ServiceEncKey))
}
if resp, e := keyClient.GetNodePlainSize(ctx, &encryption.GetNodePlainSizeRequest{
NodeId: nodeUUID,
UserId: "ds:" + dsName,
}); e == nil {
return resp.GetSize(), nil
} else {
return 0, e
}
}