feat: bt improve

internal/protocol/http/model.go

@@ -2,22 +2,22 @@ package http
 
 import "github.com/monkeyWie/gopeed-core/pkg/base"
 
-type Chunk struct {
+type chunk struct {
 	Status     base.Status
 	Begin      int64
 	End        int64
 	Downloaded int64
 }
 
-func NewChunk(begin int64, end int64) *Chunk {
-	return &Chunk{
+func newChunk(begin int64, end int64) *chunk {
+	return &chunk{
 		Status: base.DownloadStatusReady,
 		Begin:  begin,
 		End:    end,
 	}
 }
 
-type Extra struct {
+type extra struct {
 	Method string
 	Header map[string]string
 	Body   string