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validation_filter.go
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/
validation_filter.go
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// Copyright (c) 2016 Tigera, 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 calc
import (
"github.com/Sirupsen/logrus"
"github.com/projectcalico/libcalico-go/lib/backend/api"
"github.com/projectcalico/libcalico-go/lib/validator"
"reflect"
)
func NewValidationFilter(sink api.SyncerCallbacks) *ValidationFilter {
return &ValidationFilter{
sink: sink,
}
}
type ValidationFilter struct {
sink api.SyncerCallbacks
}
func (v *ValidationFilter) OnStatusUpdated(status api.SyncStatus) {
// Pass through.
v.sink.OnStatusUpdated(status)
}
func (v *ValidationFilter) OnUpdates(updates []api.Update) {
filteredUpdates := make([]api.Update, len(updates))
for i, update := range updates {
logCxt := logrus.WithFields(logrus.Fields{
"key": update.Key,
"value": update.Value,
})
logCxt.Debug("Validating KV pair.")
if update.Value != nil {
val := reflect.ValueOf(update.Value)
if val.Kind() == reflect.Ptr {
elem := val.Elem()
if elem.Kind() == reflect.Struct {
if err := validator.Validate(elem.Interface()); err != nil {
logCxt.WithError(err).Warn("Validation failed; treating as missing")
update.Value = nil
}
}
}
}
filteredUpdates[i] = update
}
v.sink.OnUpdates(filteredUpdates)
}