diff --git a/sdks/imfs/ipfs.go b/sdks/imfs/ipfs.go
index 62d7061..692137d 100644
--- a/sdks/imfs/ipfs.go
+++ b/sdks/imfs/ipfs.go
@@ -15,7 +15,7 @@ const IPFSReadPath = "/ipfs/read"
 type IPFSRead struct {
 	FileHash string `json:"fileHash"`
 	Offset   int64  `json:"offset"`
-	Length   int64  `json:"length,omitempty"` // 接口允许设置Length为0，所以这里只能omitempty
+	Length   int64  `json:"length"`
 }
 
 func (c *Client) IPFSRead(req IPFSRead) (io.ReadCloser, error) {
diff --git a/sdks/imfs/models.go b/sdks/imfs/models.go
new file mode 100644
index 0000000..ac53719
--- /dev/null
+++ b/sdks/imfs/models.go
@@ -0,0 +1,5 @@
+package imsdk
+
+const (
+	EnvPackageList = "IMFS_PACKAGE_LIST"
+)
diff --git a/sdks/storage/models.go b/sdks/storage/models.go
index cdd0afe..9cc4d41 100644
--- a/sdks/storage/models.go
+++ b/sdks/storage/models.go
@@ -7,6 +7,10 @@ import (
 	"gitlink.org.cn/cloudream/common/utils/serder"
 )
 
+const (
+	ObjectPathSeperator = "/"
+)
+
 /// TODO 将分散在各处的公共结构体定义集中到这里来
 
 const (
diff --git a/utils/http/http.go b/utils/http/http.go
index 48824a9..b0505f3 100644
--- a/utils/http/http.go
+++ b/utils/http/http.go
@@ -120,7 +120,7 @@ func ParseJSONResponse[TBody any](resp *http.Response) (TBody, error) {
 		return ret, nil
 	}
 
-	return ret, fmt.Errorf("unknow response content type: %s", contType)
+	return ret, fmt.Errorf("unknow response content type: %s, status: %d", contType, resp.StatusCode)
 }
 
 type MultiPartRequestParam struct {