59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package filestore
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import (
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"os"
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"path/filepath"
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"github.com/nightlyone/lockfile"
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"github.com/tus/tusd"
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)
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type FileLocker struct {
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// Relative or absolute path to store the locks in.
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Path string
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}
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func (locker FileLocker) LockUpload(id string) error {
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lock, err := locker.newLock(id)
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if err != nil {
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return err
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}
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err = lock.TryLock()
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if err == lockfile.ErrBusy {
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return tusd.ErrFileLocked
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}
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return err
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}
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func (locker FileLocker) UnlockUpload(id string) error {
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lock, err := locker.newLock(id)
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if err != nil {
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return err
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}
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err = lock.Unlock()
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// A "no such file or directory" will be returned if no lockfile was found.
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// Since this means that the file has never been locked, we drop the error
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// and continue as if nothing happend.
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if os.IsNotExist(err) {
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err = nil
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}
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return nil
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}
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func (locker FileLocker) newLock(id string) (lockfile.Lockfile, error) {
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path, err := filepath.Abs(locker.Path + "/" + id + ".lock")
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if err != nil {
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return lockfile.Lockfile(""), err
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}
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// We use Lockfile directly instead of lockfile.New to bypass the unnecessary
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// check whether the provided path is absolute since we just resolved it
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// on our own.
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return lockfile.Lockfile(path), nil
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}
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