137 lines
3.6 KiB
Go
137 lines
3.6 KiB
Go
// Package filestore provide a storage backend based on the local file system.
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//
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// FileStore is a storage backend used as a tusd.DataStore in tusd.NewHandler.
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// It stores the uploads in a directory specified in two different files: The
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// `[id].info` files are used to store the fileinfo in JSON format. The
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// `[id].bin` files contain the raw binary data uploaded.
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// No cleanup is performed so you may want to run a cronjob to ensure your disk
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// is not filled up with old and finished uploads.
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package filestore
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import (
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"encoding/json"
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"io"
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"io/ioutil"
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"os"
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"github.com/tus/tusd"
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"github.com/tus/tusd/lockingstore"
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"github.com/tus/tusd/uid"
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)
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var defaultFilePerm = os.FileMode(0775)
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// See the tusd.DataStore interface for documentation about the different
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// methods.
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type FileStore struct {
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// Relative or absolute path to store files in. FileStore does not check
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// whether the path exists, use os.MkdirAll in this case on your own.
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Path string
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}
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// New creates a new file based storage backend. The directory specified will
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// be used as the only storage entry. This method does not check
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// whether the path exists, use os.MkdirAll to ensure.
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// In addition, a locking mechanism is provided using lockingstore.LockingStore
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// and FileLocker.
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func New(path string) tusd.DataStore {
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store := FileStore{path}
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locker := FileLocker{path}
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return lockingstore.LockingStore{
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DataStore: &store,
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Locker: &locker,
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}
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}
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func (store FileStore) NewUpload(info tusd.FileInfo) (id string, err error) {
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id = uid.Uid()
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info.ID = id
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// Create .bin file with no content
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file, err := os.OpenFile(store.binPath(id), os.O_CREATE|os.O_WRONLY, defaultFilePerm)
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if err != nil {
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return
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}
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defer file.Close()
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// writeInfo creates the file by itself if necessary
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err = store.writeInfo(id, info)
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return
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}
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func (store FileStore) WriteChunk(id string, offset int64, src io.Reader) (int64, error) {
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file, err := os.OpenFile(store.binPath(id), os.O_WRONLY|os.O_APPEND, defaultFilePerm)
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if err != nil {
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return 0, err
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}
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defer file.Close()
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n, err := io.Copy(file, src)
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if n > 0 {
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if err := store.setOffset(id, offset+n); err != nil {
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return 0, err
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}
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}
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return n, err
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}
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func (store FileStore) GetInfo(id string) (tusd.FileInfo, error) {
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info := tusd.FileInfo{}
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data, err := ioutil.ReadFile(store.infoPath(id))
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if err != nil {
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return info, err
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}
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err = json.Unmarshal(data, &info)
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return info, err
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}
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func (store FileStore) GetReader(id string) (io.Reader, error) {
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return os.Open(store.binPath(id))
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}
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func (store FileStore) Terminate(id string) error {
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if err := os.Remove(store.infoPath(id)); err != nil {
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return err
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}
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if err := os.Remove(store.binPath(id)); err != nil {
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return err
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}
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return nil
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}
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// Return the path to the .bin storing the binary data
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func (store FileStore) binPath(id string) string {
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return store.Path + "/" + id + ".bin"
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}
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// Return the path to the .info file storing the file's info
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func (store FileStore) infoPath(id string) string {
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return store.Path + "/" + id + ".info"
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}
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// Update the entire information. Everything will be overwritten.
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func (store FileStore) writeInfo(id string, info tusd.FileInfo) error {
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data, err := json.Marshal(info)
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if err != nil {
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return err
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}
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return ioutil.WriteFile(store.infoPath(id), data, defaultFilePerm)
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}
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// Update the .info file using the new upload.
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func (store FileStore) setOffset(id string, offset int64) error {
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info, err := store.GetInfo(id)
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if err != nil {
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return err
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}
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// never decrement the offset
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if info.Offset >= offset {
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return nil
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}
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info.Offset = offset
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return store.writeInfo(id, info)
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}
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