Fix server-side namespace handling for events; add validation

pkg/api/validation/events.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package validation
+
+import (
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	errs "github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+)
+
+// ValidateEvent makes sure that the event makes sense.
+func ValidateEvent(event *api.Event) errs.ValidationErrorList {
+	allErrs := errs.ValidationErrorList{}
+	if event.Namespace != event.InvolvedObject.Namespace {
+		allErrs = append(allErrs, errs.NewFieldInvalid("involvedObject.namespace", event.InvolvedObject.Namespace))
+	}
+	if !util.IsDNSSubdomain(event.Namespace) {
+		allErrs = append(allErrs, errs.NewFieldInvalid("namespace", event.Namespace))
+	}
+	return allErrs
+}