vendor files

vendor/k8s.io/kubernetes/test/images/no-snat-test-proxy/main.go

@@ -0,0 +1,101 @@
+/*
+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"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/spf13/pflag"
+	"k8s.io/apiserver/pkg/util/flag"
+	"k8s.io/apiserver/pkg/util/logs"
+)
+
+// This Pod's /checknosnat takes `target` and `ips` arguments, and queries {target}/checknosnat?ips={ips}
+
+type MasqTestProxy struct {
+	Port string
+}
+
+func NewMasqTestProxy() *MasqTestProxy {
+	return &MasqTestProxy{
+		Port: "31235",
+	}
+}
+
+func (m *MasqTestProxy) AddFlags(fs *pflag.FlagSet) {
+	fs.StringVar(&m.Port, "port", m.Port, "The port to serve /checknosnat endpoint on.")
+}
+
+func main() {
+	m := NewMasqTestProxy()
+	m.AddFlags(pflag.CommandLine)
+
+	flag.InitFlags()
+	logs.InitLogs()
+	defer logs.FlushLogs()
+
+	if err := m.Run(); err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+}
+
+func (m *MasqTestProxy) Run() error {
+	// register handler
+	http.HandleFunc("/checknosnat", checknosnat)
+
+	// spin up the server
+	return http.ListenAndServe(":"+m.Port, nil)
+}
+
+type handler func(http.ResponseWriter, *http.Request)
+
+func joinErrors(errs []error, sep string) string {
+	strs := make([]string, len(errs))
+	for i, err := range errs {
+		strs[i] = err.Error()
+	}
+	return strings.Join(strs, sep)
+}
+
+func checknosnatURL(pip, ips string) string {
+	return fmt.Sprintf("http://%s/checknosnat?ips=%s", pip, ips)
+}
+
+func checknosnat(w http.ResponseWriter, req *http.Request) {
+	url := checknosnatURL(req.URL.Query().Get("target"), req.URL.Query().Get("ips"))
+	resp, err := http.Get(url)
+	if err != nil {
+		w.WriteHeader(500)
+		fmt.Fprintf(w, "error querying %q, err: %v", url, err)
+	} else {
+		body, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			w.WriteHeader(500)
+			fmt.Fprintf(w, "error reading body of response from %q, err: %v", url, err)
+		} else {
+			// Respond the same status code and body as /checknosnat on the internal Pod
+			w.WriteHeader(resp.StatusCode)
+			w.Write(body)
+		}
+	}
+	resp.Body.Close()
+}