portal/tusstore/store.go

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package tusstore
import (
"context"
"crypto/rand"
"encoding/hex"
"encoding/json"
"fmt"
"git.lumeweb.com/LumeWeb/portal/db"
"git.lumeweb.com/LumeWeb/portal/logger"
"git.lumeweb.com/LumeWeb/portal/model"
"git.lumeweb.com/LumeWeb/portal/shared"
"github.com/golang-queue/queue"
"github.com/tus/tusd/pkg/handler"
"go.uber.org/zap"
"io"
"os"
"path/filepath"
)
var defaultFilePerm = os.FileMode(0664)
type DbFileStore struct {
// Relative or absolute path to store files in. DbFileStore does not check
// whether the path exists, use os.MkdirAll in this case on your own.
Path string
}
func (store DbFileStore) UseIn(composer *handler.StoreComposer) {
composer.UseCore(store)
composer.UseTerminater(store)
composer.UseConcater(store)
composer.UseLengthDeferrer(store)
}
func (store DbFileStore) NewUpload(ctx context.Context, info handler.FileInfo) (handler.Upload, error) {
if info.ID == "" {
info.ID = uid()
}
binPath := store.binPath(info.ID)
info.Storage = map[string]string{
"Type": "dbstore",
"Path": binPath,
}
// Create binary file with no content
file, err := os.OpenFile(binPath, os.O_CREATE|os.O_WRONLY, defaultFilePerm)
if err != nil {
if os.IsNotExist(err) {
err = fmt.Errorf("upload directory does not exist: %s", store.Path)
}
return nil, err
}
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err = file.Close()
if err != nil {
return nil, err
}
if err != nil {
return nil, err
}
upload := &fileUpload{
info: info,
binPath: binPath,
hash: info.MetaData["hash"],
}
// writeInfo creates the file by itself if necessary
err = upload.writeInfo()
if err != nil {
return nil, err
}
return upload, nil
}
func (store DbFileStore) GetUpload(ctx context.Context, id string) (handler.Upload, error) {
info := handler.FileInfo{
ID: id,
}
fUpload := &fileUpload{info: info}
record, is404, err := fUpload.getInfo()
if err != nil {
if is404 {
// Interpret os.ErrNotExist as 404 Not Found
err = handler.ErrNotFound
}
return nil, err
}
if err := json.Unmarshal([]byte(record.Info), &info); err != nil {
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logger.Get().Error("fail to parse upload meta", zap.Error(err))
return nil, err
}
fUpload.info = info
fUpload.hash = record.Hash
binPath := store.binPath(id)
stat, err := os.Stat(binPath)
if err != nil {
if os.IsNotExist(err) {
// Interpret os.ErrNotExist as 404 Not Found
err = handler.ErrNotFound
}
return nil, err
}
info.Offset = stat.Size()
fUpload.binPath = binPath
return fUpload, nil
}
func (store DbFileStore) AsTerminatableUpload(upload handler.Upload) handler.TerminatableUpload {
return upload.(*fileUpload)
}
func (store DbFileStore) AsLengthDeclarableUpload(upload handler.Upload) handler.LengthDeclarableUpload {
return upload.(*fileUpload)
}
func (store DbFileStore) AsConcatableUpload(upload handler.Upload) handler.ConcatableUpload {
return upload.(*fileUpload)
}
// binPath returns the path to the file storing the binary data.
func (store DbFileStore) binPath(id string) string {
return filepath.Join(store.Path, id)
}
type fileUpload struct {
// info stores the current information about the upload
info handler.FileInfo
// binPath is the path to the binary file (which has no extension)
binPath string
hash string
}
func (upload *fileUpload) GetInfo(ctx context.Context) (handler.FileInfo, error) {
return upload.info, nil
}
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)
upload.info.Offset += n
err = upload.writeInfo()
if err != nil {
return 0, err
}
return n, err
}
func (upload *fileUpload) GetReader(ctx context.Context) (io.Reader, error) {
return os.Open(upload.binPath)
}
func (upload *fileUpload) Terminate(ctx context.Context) error {
tusUpload := &model.Tus{
UploadID: upload.info.ID,
}
ret := db.Get().Where(&tusUpload).Delete(&tusUpload)
if ret.Error != nil {
logger.Get().Error("failed to delete tus entry", zap.Error(ret.Error))
}
if err := os.Remove(upload.binPath); err != nil {
return err
}
return nil
}
func (upload *fileUpload) ConcatUploads(ctx context.Context, uploads []handler.Upload) (err error) {
file, err := os.OpenFile(upload.binPath, os.O_WRONLY|os.O_APPEND, defaultFilePerm)
if err != nil {
return err
}
defer file.Close()
for _, partialUpload := range uploads {
fileUpload := partialUpload.(*fileUpload)
src, err := os.Open(fileUpload.binPath)
if err != nil {
return err
}
if _, err := io.Copy(file, src); err != nil {
return err
}
}
return
}
func (upload *fileUpload) DeclareLength(ctx context.Context, length int64) error {
upload.info.Size = length
upload.info.SizeIsDeferred = false
return upload.writeInfo()
}
// 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
}
tusRecord, is404, err := upload.getInfo()
if err != nil && !is404 {
return err
}
if tusRecord != nil {
tusRecord.Info = string(data)
if ret := db.Get().Save(&tusRecord); ret.Error != nil {
logger.Get().Error("failed to update tus entry", zap.Error(ret.Error))
return ret.Error
}
return nil
}
tusRecord = &model.Tus{UploadID: upload.info.ID, Hash: upload.hash, Info: string(data)}
if ret := db.Get().Create(&tusRecord); ret.Error != nil {
logger.Get().Error("failed to create tus entry", zap.Error(ret.Error))
return ret.Error
}
return nil
}
func (upload *fileUpload) getInfo() (*model.Tus, bool, error) {
var tusRecord model.Tus
result := db.Get().Where(&model.Tus{UploadID: upload.info.ID}).First(&tusRecord)
if result.Error != nil && result.Error.Error() != "record not found" {
logger.Get().Error("failed to query tus entry", zap.Error(result.Error))
return nil, false, result.Error
}
if result.Error != nil {
return nil, true, result.Error
}
return &tusRecord, false, nil
}
func (upload *fileUpload) FinishUpload(ctx context.Context) error {
if err := getQueue().QueueTask(func(ctx context.Context) error {
upload, err := getStore().GetUpload(nil, upload.info.ID)
if err != nil {
logger.Get().Error("failed to query tus upload", zap.Error(err))
return err
}
return shared.GetTusWorker()(&upload)
}); err != nil {
logger.Get().Error("failed to queue tus upload", zap.Error(err))
return err
}
return nil
}
func uid() string {
id := make([]byte, 16)
_, err := io.ReadFull(rand.Reader, id)
if err != nil {
// This is probably an appropriate way to handle errors from our source
// for random bits.
panic(err)
}
return hex.EncodeToString(id)
}
func getQueue() *queue.Queue {
ret := shared.GetTusQueue()
return (*ret).(*queue.Queue)
}
func getStore() *DbFileStore {
ret := shared.GetTusStore()
return (*ret).(*DbFileStore)
}