Support warn headers

pkg/client/factory.go

@@ -160,16 +160,18 @@ func (p *Factory) TableAdminClientForWatch(ctx *types.APIRequest, s *types.APISc
 }
 
 func setupConfig(ctx *types.APIRequest, cfg *rest.Config, impersonate bool) (*rest.Config, error) {
+	cfg = rest.CopyConfig(cfg)
 	if impersonate {
 		user, ok := request.UserFrom(ctx.Context())
 		if !ok {
 			return nil, fmt.Errorf("user not found for impersonation")
 		}
-		cfg = rest.CopyConfig(cfg)
 		cfg.Impersonate.UserName = user.GetName()
 		cfg.Impersonate.Groups = user.GetGroups()
 		cfg.Impersonate.Extra = user.GetExtra()
 	}
+
+	cfg.WarningHandler = APIWarnings{ctx.Response}
 	return cfg, nil
 }
 

pkg/client/warn_panda.go

@@ -0,0 +1,17 @@
+package client
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/sirupsen/logrus"
+)
+
+type APIWarnings struct {
+	response http.ResponseWriter
+}
+
+func (am APIWarnings) HandleWarningHeader(code int, agent string, message string) {
+	logrus.Infof("====HandleWarningHeader===== %s", message)
+	am.response.Header().Add("X-API-Warnings", fmt.Sprintf("%d - %s", code, message))
+}