98 lines
1.9 KiB
Go
98 lines
1.9 KiB
Go
package store
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import (
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"io/ioutil"
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"os"
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"path"
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"github.com/lbryio/lbry.go/errors"
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)
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// FileBlobStore is a local disk store.
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type FileBlobStore struct {
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dir string
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initialized bool
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}
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// NewFileBlobStore returns an initialized file disk store pointer.
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func NewFileBlobStore(dir string) *FileBlobStore {
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return &FileBlobStore{dir: dir}
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}
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func (f *FileBlobStore) path(hash string) string {
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return path.Join(f.dir, hash)
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}
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func (f *FileBlobStore) initOnce() error {
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if f.initialized {
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return nil
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}
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if stat, err := os.Stat(f.dir); err != nil {
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if os.IsNotExist(err) {
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err2 := os.Mkdir(f.dir, 0755)
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if err2 != nil {
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return err2
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}
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} else {
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return err
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}
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} else if !stat.IsDir() {
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return errors.Err("blob dir exists but is not a dir")
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}
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f.initialized = true
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return nil
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}
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// Has returns T/F or Error if it the blob stored already. It will error with any IO disk error.
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func (f *FileBlobStore) Has(hash string) (bool, error) {
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err := f.initOnce()
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if err != nil {
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return false, err
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}
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_, err = os.Stat(f.path(hash))
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if err != nil {
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if os.IsNotExist(err) {
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return false, nil
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}
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return false, err
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}
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return true, nil
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}
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// Get returns the byte slice of the blob stored or will error if the blob doesn't exist.
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func (f *FileBlobStore) Get(hash string) ([]byte, error) {
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err := f.initOnce()
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if err != nil {
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return []byte{}, err
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}
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file, err := os.Open(f.path(hash))
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if err != nil {
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if os.IsNotExist(err) {
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return []byte{}, errors.Err(ErrBlobNotFound)
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}
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return []byte{}, err
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}
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return ioutil.ReadAll(file)
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}
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// Put stores the blob on disk
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func (f *FileBlobStore) Put(hash string, blob []byte) error {
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err := f.initOnce()
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if err != nil {
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return err
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}
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return ioutil.WriteFile(f.path(hash), blob, 0644)
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}
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// PutSD stores the sd blob on the disk
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func (f *FileBlobStore) PutSD(hash string, blob []byte) error {
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return f.Put(hash, blob)
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}
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