Split implementations from generic code

core/pkg/ingress/controller/util.go

@@ -0,0 +1,95 @@
+/*
+Copyright 2015 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 controller
+
+import (
+	"strings"
+
+	"k8s.io/ingress/core/pkg/ingress"
+	"k8s.io/ingress/core/pkg/ingress/annotations/parser"
+
+	"k8s.io/kubernetes/pkg/apis/extensions"
+)
+
+// newDefaultServer return an UpstreamServer to be use as default server that returns 503.
+func newDefaultServer() ingress.UpstreamServer {
+	return ingress.UpstreamServer{Address: "127.0.0.1", Port: "8181"}
+}
+
+// newUpstream creates an upstream without servers.
+func newUpstream(name string) *ingress.Upstream {
+	return &ingress.Upstream{
+		Name:     name,
+		Backends: []ingress.UpstreamServer{},
+	}
+}
+
+func isHostValid(host string, cert *ingress.SSLCert) bool {
+	if cert == nil {
+		return false
+	}
+	for _, cn := range cert.CN {
+		if matchHostnames(cn, host) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func matchHostnames(pattern, host string) bool {
+	host = strings.TrimSuffix(host, ".")
+	pattern = strings.TrimSuffix(pattern, ".")
+
+	if len(pattern) == 0 || len(host) == 0 {
+		return false
+	}
+
+	patternParts := strings.Split(pattern, ".")
+	hostParts := strings.Split(host, ".")
+
+	if len(patternParts) != len(hostParts) {
+		return false
+	}
+
+	for i, patternPart := range patternParts {
+		if i == 0 && patternPart == "*" {
+			continue
+		}
+		if patternPart != hostParts[i] {
+			return false
+		}
+	}
+
+	return true
+}
+
+// IsValidClass returns true if the given Ingress either doesn't specify
+// the ingress.class annotation, or it's set to the configured in the
+// ingress controller.
+func IsValidClass(ing *extensions.Ingress, class string) bool {
+	if class == "" {
+		return true
+	}
+
+	cc, _ := parser.GetStringAnnotation(ingressClassKey, ing)
+	if cc == "" {
+		return true
+	}
+
+	return cc == class
+}