Split implementations from generic code

core/pkg/ingress/annotations/rewrite/main.go

@@ -0,0 +1,64 @@
+/*
+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 rewrite
+
+import (
+	"errors"
+
+	"k8s.io/ingress/core/pkg/ingress/annotations/parser"
+	"k8s.io/ingress/core/pkg/ingress/defaults"
+
+	"k8s.io/kubernetes/pkg/apis/extensions"
+)
+
+const (
+	rewriteTo   = "ingress.kubernetes.io/rewrite-target"
+	addBaseURL  = "ingress.kubernetes.io/add-base-url"
+	sslRedirect = "ingress.kubernetes.io/ssl-redirect"
+)
+
+// Redirect describes the per location redirect config
+type Redirect struct {
+	// Target URI where the traffic must be redirected
+	Target string
+	// AddBaseURL indicates if is required to add a base tag in the head
+	// of the responses from the upstream servers
+	AddBaseURL bool
+	// SSLRedirect indicates if the location section is accessible SSL only
+	SSLRedirect bool
+}
+
+// ParseAnnotations parses the annotations contained in the ingress
+// rule used to rewrite the defined paths
+func ParseAnnotations(cfg defaults.Backend, ing *extensions.Ingress) (*Redirect, error) {
+	if ing.GetAnnotations() == nil {
+		return &Redirect{}, errors.New("no annotations present")
+	}
+
+	sslRe, err := parser.GetBoolAnnotation(sslRedirect, ing)
+	if err != nil {
+		sslRe = cfg.SSLRedirect
+	}
+
+	rt, _ := parser.GetStringAnnotation(rewriteTo, ing)
+	abu, _ := parser.GetBoolAnnotation(addBaseURL, ing)
+	return &Redirect{
+		Target:      rt,
+		AddBaseURL:  abu,
+		SSLRedirect: sslRe,
+	}, nil
+}