132 lines
3.7 KiB
Go
132 lines
3.7 KiB
Go
// Copyright or © or Copr. happyDNS (2020)
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//
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// contact@happydomain.org
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//
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// This software is a computer program whose purpose is to provide a modern
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// interface to interact with DNS systems.
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//
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// This software is governed by the CeCILL license under French law and abiding
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// by the rules of distribution of free software. You can use, modify and/or
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// redistribute the software under the terms of the CeCILL license as
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// circulated by CEA, CNRS and INRIA at the following URL
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// "http://www.cecill.info".
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//
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// As a counterpart to the access to the source code and rights to copy, modify
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// and redistribute granted by the license, users are provided only with a
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// limited warranty and the software's author, the holder of the economic
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// rights, and the successive licensors have only limited liability.
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//
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// In this respect, the user's attention is drawn to the risks associated with
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// loading, using, modifying and/or developing or reproducing the software by
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// the user in light of its specific status of free software, that may mean
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// that it is complicated to manipulate, and that also therefore means that it
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// is reserved for developers and experienced professionals having in-depth
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// computer knowledge. Users are therefore encouraged to load and test the
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// software's suitability as regards their requirements in conditions enabling
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// the security of their systems and/or data to be ensured and, more generally,
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// to use and operate it in the same conditions as regards security.
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//
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// The fact that you are presently reading this means that you have had
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// knowledge of the CeCILL license and that you accept its terms.
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package database // import "happydns.org/storage/leveldb"
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import (
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"encoding/json"
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"fmt"
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"log"
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"git.happydns.org/happydomain/model"
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"github.com/syndtr/goleveldb/leveldb"
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"github.com/syndtr/goleveldb/leveldb/errors"
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"github.com/syndtr/goleveldb/leveldb/iterator"
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"github.com/syndtr/goleveldb/leveldb/util"
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)
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type LevelDBStorage struct {
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db *leveldb.DB
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}
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// NewMySQLStorage establishes the connection to the database
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func NewLevelDBStorage(path string) (s *LevelDBStorage, err error) {
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var db *leveldb.DB
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db, err = leveldb.OpenFile(path, nil)
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if err != nil {
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if _, ok := err.(*errors.ErrCorrupted); ok {
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log.Println("LevelDB was corrupted; attempting recovery (%s)", err.Error())
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_, err = leveldb.RecoverFile(path, nil)
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if err != nil {
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return
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}
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log.Println("LevelDB recovery succeeded!")
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} else {
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return
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}
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}
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s = &LevelDBStorage{db}
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return
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}
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func (s *LevelDBStorage) Tidy() error {
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for _, tidy := range []func() error{s.TidySessions, s.TidyProviders, s.TidyDomains, s.TidyZones} {
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if err := tidy(); err != nil {
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return err
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}
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}
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return nil
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}
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func (s *LevelDBStorage) Close() error {
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return s.db.Close()
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}
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func decodeData(data []byte, v interface{}) error {
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return json.Unmarshal(data, v)
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}
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func (s *LevelDBStorage) get(key string, v interface{}) error {
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data, err := s.db.Get([]byte(key), nil)
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if err != nil {
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return err
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}
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return decodeData(data, v)
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}
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func (s *LevelDBStorage) put(key string, v interface{}) error {
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data, err := json.Marshal(v)
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if err != nil {
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return err
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}
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return s.db.Put([]byte(key), data, nil)
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}
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func (s *LevelDBStorage) findIdentifierKey(prefix string) (key string, id happydns.Identifier, err error) {
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found := true
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for found {
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id, err = happydns.NewRandomIdentifier()
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if err != nil {
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return
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}
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key = fmt.Sprintf("%s%s", prefix, id.String())
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found, err = s.db.Has([]byte(key), nil)
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if err != nil {
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return
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}
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}
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return
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}
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func (s *LevelDBStorage) delete(key string) error {
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return s.db.Delete([]byte(key), nil)
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}
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func (s *LevelDBStorage) search(prefix string) iterator.Iterator {
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return s.db.NewIterator(util.BytesPrefix([]byte(prefix)), nil)
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}
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