2 files changed, 45 insertions, 1 deletions
diff --git a/bilibili/errors/errors.go b/bilibili/errors/errors.go
new file mode 100644
index 0000000..2b810ed
--- /dev/null
+++ b/bilibili/errors/errors.go
@@ -0,0 +1,43 @@
+package errors
+
+import (
+	"fmt"
+)
+
+/*
+Task errors.
+*/
+
+type RecoverableTaskError struct {
+	err     error
+	message string
+}
+
+func (e *RecoverableTaskError) Error() string {
+	return fmt.Sprintf("%v: %v", e.message, e.err)
+}
+
+func (e *RecoverableTaskError) Unwrap() error {
+	return e.err
+}
+
+func NewRecoverableTaskError(message string, err error) error {
+	return &RecoverableTaskError{message: message, err: err}
+}
+
+type UnrecoverableTaskError struct {
+	err     error
+	message string
+}
+
+func (e *UnrecoverableTaskError) Error() string {
+	return fmt.Sprintf("%v: %v", e.message, e.err)
+}
+
+func (e *UnrecoverableTaskError) Unwrap() error {
+	return e.err
+}
+
+func NewUnrecoverableTaskError(message string, err error) error {
+	return &UnrecoverableTaskError{message: message, err: err}
+}
diff --git a/bilibili/streaming.go b/bilibili/streaming.go
index 8f6c491..d081a8f 100644
--- a/bilibili/streaming.go
+++ b/bilibili/streaming.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	errors2 "github.com/keuin/slbr/bilibili/errors"
 	"github.com/keuin/slbr/common"
 	"io"
 	"net/http"
@@ -70,7 +71,7 @@ func (b Bilibili) CopyLiveStream(
 	out, err = fileCreator()
 	if err != nil {
 		b.logger.Error("Cannot open file for writing: %v", err)
-		err = common.NewUnrecoverableTaskError("failed to create file", err)
+		err = errors2.NewUnrecoverableTaskError("failed to create file", err)
 		return
 	}
 	_, err = out.Write(initBytes)