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examples/customization/external-auth-headers/echosvc/Dockerfile

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+FROM alpine:3.5
+MAINTAINER Roman Safronov <electroma@gmail.com>
+COPY echosvc /
+EXPOSE 8080
+ENTRYPOINT ["/echosvc"]

examples/customization/external-auth-headers/echosvc/echosvc.go

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+/*
+Copyright 2017 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 main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "UserID: %s, UserRole: %s", r.Header.Get("UserID"), r.Header.Get("UserRole"))
+}
+
+// Sample  "echo" service displaying UserID and UserRole HTTP request headers
+func main() {
+	http.HandleFunc("/", handler)
+	http.ListenAndServe(":8080", nil)
+}