tusd/filestore/filestore.go

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