1 files changed, 16 insertions, 2 deletions
diff --git a/plumbing/transport/http/common.go b/plumbing/transport/http/common.go
index a7cdc1e..54126fe 100644
--- a/plumbing/transport/http/common.go
+++ b/plumbing/transport/http/common.go
@@ -406,14 +406,28 @@ func (a *TokenAuth) String() string {
 // Err is a dedicated error to return errors based on status code
 type Err struct {
 	Response *http.Response
+	Reason   string
 }
 
-// NewErr returns a new Err based on a http response
+// NewErr returns a new Err based on a http response and closes response body
+// if needed
 func NewErr(r *http.Response) error {
 	if r.StatusCode >= http.StatusOK && r.StatusCode < http.StatusMultipleChoices {
 		return nil
 	}
 
+	var reason string
+
+	// If a response message is present, add it to error
+	var messageBuffer bytes.Buffer
+	if r.Body != nil {
+		messageLength, _ := messageBuffer.ReadFrom(r.Body)
+		if messageLength > 0 {
+			reason = messageBuffer.String()
+		}
+		_ = r.Body.Close()
+	}
+
 	switch r.StatusCode {
 	case http.StatusUnauthorized:
 		return transport.ErrAuthenticationRequired
@@ -423,7 +437,7 @@ func NewErr(r *http.Response) error {
 		return transport.ErrRepositoryNotFound
 	}
 
-	return plumbing.NewUnexpectedError(&Err{r})
+	return plumbing.NewUnexpectedError(&Err{r, reason})
 }
 
 // StatusCode returns the status code of the response