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upload.go
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upload.go
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// Copyright 2018-2021 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package localfs
import (
"context"
"encoding/json"
"io"
"os"
"path/filepath"
userpb "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
"github.com/cs3org/reva/v2/pkg/appctx"
ctxpkg "github.com/cs3org/reva/v2/pkg/ctx"
"github.com/cs3org/reva/v2/pkg/errtypes"
"github.com/cs3org/reva/v2/pkg/storage"
"github.com/cs3org/reva/v2/pkg/storage/utils/chunking"
"github.com/cs3org/reva/v2/pkg/utils"
"github.com/google/uuid"
"github.com/pkg/errors"
tusd "github.com/tus/tusd/pkg/handler"
)
var defaultFilePerm = os.FileMode(0664)
func (fs *localfs) Upload(ctx context.Context, req storage.UploadRequest, uff storage.UploadFinishedFunc) (provider.ResourceInfo, error) {
upload, err := fs.GetUpload(ctx, req.Ref.GetPath())
if err != nil {
return provider.ResourceInfo{}, errors.Wrap(err, "localfs: error retrieving upload")
}
uploadInfo := upload.(*fileUpload)
p := uploadInfo.info.Storage["InternalDestination"]
if chunking.IsChunked(p) {
var assembledFile string
p, assembledFile, err = fs.chunkHandler.WriteChunk(p, req.Body)
if err != nil {
return provider.ResourceInfo{}, err
}
if p == "" {
if err = uploadInfo.Terminate(ctx); err != nil {
return provider.ResourceInfo{}, errors.Wrap(err, "localfs: error removing auxiliary files")
}
return provider.ResourceInfo{}, errtypes.PartialContent(req.Ref.String())
}
uploadInfo.info.Storage["InternalDestination"] = p
fd, err := os.Open(assembledFile)
if err != nil {
return provider.ResourceInfo{}, errors.Wrap(err, "localfs: error opening assembled file")
}
defer fd.Close()
defer os.RemoveAll(assembledFile)
req.Body = fd
}
if _, err := uploadInfo.WriteChunk(ctx, 0, req.Body); err != nil {
return provider.ResourceInfo{}, errors.Wrap(err, "localfs: error writing to binary file")
}
if err := uploadInfo.FinishUpload(ctx); err != nil {
return provider.ResourceInfo{}, err
}
if uff != nil {
info := uploadInfo.info
uploadRef := &provider.Reference{
ResourceId: &provider.ResourceId{
StorageId: info.MetaData["providerID"],
SpaceId: info.Storage["SpaceRoot"],
OpaqueId: info.Storage["SpaceRoot"],
},
Path: utils.MakeRelativePath(filepath.Join(info.MetaData["dir"], info.MetaData["filename"])),
}
owner, ok := ctxpkg.ContextGetUser(uploadInfo.ctx)
if !ok {
return provider.ResourceInfo{}, errtypes.PreconditionFailed("error getting user from uploadinfo context")
}
// spaces support in localfs needs to be revisited:
// * info.Storage["SpaceRoot"] is never set
// * there is no space owner or manager that could be passed to the UploadFinishedFunc
uff(owner.Id, owner.Id, uploadRef)
}
// return id, etag and mtime
ri, err := fs.GetMD(ctx, req.Ref, []string{}, []string{"id", "etag", "mtime"})
if err != nil {
return provider.ResourceInfo{}, err
}
return *ri, nil
}
// InitiateUpload returns upload ids corresponding to different protocols it supports
// It resolves the resource and then reuses the NewUpload function
// Currently requires the uploadLength to be set
// TODO to implement LengthDeferrerDataStore make size optional
// TODO read optional content for small files in this request
func (fs *localfs) InitiateUpload(ctx context.Context, ref *provider.Reference, uploadLength int64, metadata map[string]string) (map[string]string, error) {
np, err := fs.resolve(ctx, ref)
if err != nil {
return nil, errors.Wrap(err, "localfs: error resolving reference")
}
info := tusd.FileInfo{
MetaData: tusd.MetaData{
"filename": filepath.Base(np),
"dir": filepath.Dir(np),
},
Size: uploadLength,
}
if metadata != nil {
info.MetaData["providerID"] = metadata["providerID"]
if metadata["mtime"] != "" {
info.MetaData["mtime"] = metadata["mtime"]
}
if _, ok := metadata["sizedeferred"]; ok {
info.SizeIsDeferred = true
}
}
upload, err := fs.NewUpload(ctx, info)
if err != nil {
return nil, err
}
info, _ = upload.GetInfo(ctx)
return map[string]string{
"simple": info.ID,
"tus": info.ID,
}, nil
}
// UseIn tells the tus upload middleware which extensions it supports.
func (fs *localfs) UseIn(composer *tusd.StoreComposer) {
composer.UseCore(fs)
composer.UseTerminater(fs)
// TODO composer.UseConcater(fs)
// TODO composer.UseLengthDeferrer(fs)
}
// NewUpload creates a new upload using the size as the file's length. To determine where to write the binary data
// the Fileinfo metadata must contain a dir and a filename.
// returns a unique id which is used to identify the upload. The properties Size and MetaData will be filled.
func (fs *localfs) NewUpload(ctx context.Context, info tusd.FileInfo) (upload tusd.Upload, err error) {
log := appctx.GetLogger(ctx)
log.Debug().Interface("info", info).Msg("localfs: NewUpload")
fn := info.MetaData["filename"]
if fn == "" {
return nil, errors.New("localfs: missing filename in metadata")
}
info.MetaData["filename"] = filepath.Clean(info.MetaData["filename"])
dir := info.MetaData["dir"]
if dir == "" {
return nil, errors.New("localfs: missing dir in metadata")
}
info.MetaData["dir"] = filepath.Clean(info.MetaData["dir"])
np := fs.wrap(ctx, filepath.Join(info.MetaData["dir"], info.MetaData["filename"]))
log.Debug().Interface("info", info).Msg("localfs: resolved filename")
info.ID = uuid.New().String()
binPath, err := fs.getUploadPath(ctx, info.ID)
if err != nil {
return nil, errors.Wrap(err, "localfs: error resolving upload path")
}
usr := ctxpkg.ContextMustGetUser(ctx)
info.Storage = map[string]string{
"Type": "LocalStore",
"BinPath": binPath,
"InternalDestination": np,
"Idp": usr.Id.Idp,
"UserId": usr.Id.OpaqueId,
"UserName": usr.Username,
"UserType": utils.UserTypeToString(usr.Id.Type),
"LogLevel": log.GetLevel().String(),
}
// Create binary file with no content
file, err := os.OpenFile(binPath, os.O_CREATE|os.O_WRONLY, defaultFilePerm)
if err != nil {
return nil, err
}
defer file.Close()
u := &fileUpload{
info: info,
binPath: binPath,
infoPath: binPath + ".info",
fs: fs,
ctx: ctx,
}
// writeInfo creates the file by itself if necessary
err = u.writeInfo()
if err != nil {
return nil, err
}
return u, nil
}
func (fs *localfs) getUploadPath(ctx context.Context, uploadID string) (string, error) {
return filepath.Join(fs.conf.Uploads, uploadID), nil
}
// GetUpload returns the Upload for the given upload id
func (fs *localfs) GetUpload(ctx context.Context, id string) (tusd.Upload, error) {
binPath, err := fs.getUploadPath(ctx, id)
if err != nil {
return nil, err
}
infoPath := binPath + ".info"
info := tusd.FileInfo{}
data, err := os.ReadFile(infoPath)
if err != nil {
if os.IsNotExist(err) {
// Interpret os.ErrNotExist as 404 Not Found
err = tusd.ErrNotFound
}
return nil, err
}
if err := json.Unmarshal(data, &info); err != nil {
return nil, err
}
stat, err := os.Stat(binPath)
if err != nil {
return nil, err
}
info.Offset = stat.Size()
u := &userpb.User{
Id: &userpb.UserId{
Idp: info.Storage["Idp"],
OpaqueId: info.Storage["UserId"],
Type: utils.UserTypeMap(info.Storage["UserType"]),
},
Username: info.Storage["UserName"],
}
ctx = ctxpkg.ContextSetUser(ctx, u)
return &fileUpload{
info: info,
binPath: binPath,
infoPath: infoPath,
fs: fs,
ctx: ctx,
}, nil
}
type fileUpload struct {
// info stores the current information about the upload
info tusd.FileInfo
// infoPath is the path to the .info file
infoPath string
// binPath is the path to the binary file (which has no extension)
binPath string
// only fs knows how to handle metadata and versions
fs *localfs
// a context with a user
ctx context.Context
}
// GetInfo returns the FileInfo
func (upload *fileUpload) GetInfo(ctx context.Context) (tusd.FileInfo, error) {
return upload.info, nil
}
// GetReader returns an io.Reader for the upload
func (upload *fileUpload) GetReader(ctx context.Context) (io.Reader, error) {
return os.Open(upload.binPath)
}
// WriteChunk writes the stream from the reader to the given offset of the upload
func (upload *fileUpload) WriteChunk(ctx context.Context, offset int64, src io.Reader) (int64, error) {
file, err := os.OpenFile(upload.binPath, os.O_WRONLY|os.O_APPEND, defaultFilePerm)
if err != nil {
return 0, err
}
defer file.Close()
n, err := io.Copy(file, src)
// If the HTTP PATCH request gets interrupted in the middle (e.g. because
// the user wants to pause the upload), Go's net/http returns an io.ErrUnexpectedEOF.
// However, for OwnCloudStore it's not important whether the stream has ended
// on purpose or accidentally.
if err != nil {
if err != io.ErrUnexpectedEOF {
return n, err
}
}
upload.info.Offset += n
err = upload.writeInfo()
return n, err
}
// writeInfo updates the entire information. Everything will be overwritten.
func (upload *fileUpload) writeInfo() error {
data, err := json.Marshal(upload.info)
if err != nil {
return err
}
return os.WriteFile(upload.infoPath, data, defaultFilePerm)
}
// FinishUpload finishes an upload and moves the file to the internal destination
func (upload *fileUpload) FinishUpload(ctx context.Context) error {
np := upload.info.Storage["InternalDestination"]
// TODO check etag with If-Match header
// if destination exists
// if _, err := os.Stat(np); err == nil {
// the local storage does not store metadata
// the fileid is based on the path, so no we do not need to copy it to the new file
// the local storage does not track revisions
//}
// if destination exists
if _, err := os.Stat(np); err == nil {
// create revision
if err := upload.fs.archiveRevision(upload.ctx, np); err != nil {
return err
}
}
err := os.Rename(upload.binPath, np)
if err != nil {
return err
}
// only delete the upload if it was successfully written to the fs
if err := os.Remove(upload.infoPath); err != nil {
if !os.IsNotExist(err) {
log := appctx.GetLogger(ctx)
log.Err(err).Interface("info", upload.info).Msg("localfs: could not delete upload info")
}
}
// TODO: set mtime if specified in metadata
// metadata propagation is left to the storage implementation
return err
}
// To implement the termination extension as specified in https://tus.io/protocols/resumable-upload.html#termination
// - the storage needs to implement AsTerminatableUpload
// - the upload needs to implement Terminate
// AsTerminatableUpload returns a a TerminatableUpload
func (fs *localfs) AsTerminatableUpload(upload tusd.Upload) tusd.TerminatableUpload {
return upload.(*fileUpload)
}
// Terminate terminates the upload
func (upload *fileUpload) Terminate(ctx context.Context) error {
if err := os.Remove(upload.infoPath); err != nil {
return err
}
if err := os.Remove(upload.binPath); err != nil {
return err
}
return nil
}