lua-resty-waf controller (#2304)

internal/ingress/annotations/luarestywaf/main.go

@@ -0,0 +1,74 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+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 luarestywaf
+
+import (
+	extensions "k8s.io/api/extensions/v1beta1"
+
+	"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
+	"k8s.io/ingress-nginx/internal/ingress/resolver"
+)
+
+// Config returns lua-resty-waf configuration for an Ingress rule
+type Config struct {
+	Enabled bool `json:"enabled"`
+	Debug   bool `json:"debug"`
+}
+
+// Equal tests for equality between two Config types
+func (e1 *Config) Equal(e2 *Config) bool {
+	if e1 == e2 {
+		return true
+	}
+	if e1 == nil || e2 == nil {
+		return false
+	}
+	if e1.Enabled != e2.Enabled {
+		return false
+	}
+	if e1.Debug != e2.Debug {
+		return false
+	}
+
+	return true
+}
+
+type luarestywaf struct {
+	r resolver.Resolver
+}
+
+// NewParser creates a new CORS annotation parser
+func NewParser(r resolver.Resolver) parser.IngressAnnotation {
+	return luarestywaf{r}
+}
+
+// Parse parses the annotations contained in the ingress rule
+// used to indicate if the location/s contains a fragment of
+// configuration to be included inside the paths of the rules
+func (a luarestywaf) Parse(ing *extensions.Ingress) (interface{}, error) {
+	enabled, err := parser.GetBoolAnnotation("lua-resty-waf", ing)
+	if err != nil {
+		return &Config{}, err
+	}
+
+	debug, _ := parser.GetBoolAnnotation("lua-resty-waf-debug", ing)
+
+	return &Config{
+		Enabled: enabled,
+		Debug:   debug,
+	}, nil
+}