Use sql database instead of bolt

internal/boltdb/paste.go

@@ -322,3 +322,24 @@ func GenerateDeleteToken() (string, error) {
 	}
 	return hex.EncodeToString(deleteToken[:]), nil
 }
+
+// AllPastes tries to retrieve all the Paste objects from the database.
+func AllPastes(tx *bolt.Tx) ([]Paste, error) {
+	bucket := tx.Bucket([]byte(BucketPastes))
+	if bucket == nil {
+		return nil, errors.Errorf("bucket %v does not exist", BucketPastes)
+	}
+	var ps []Paste
+	err := bucket.ForEach(func(_, storedBytes []byte) error {
+		p, err := decodePaste(storedBytes)
+		if err != nil {
+			return err
+		}
+		ps = append(ps, *p)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return ps, nil
+}