1// Copyright 2018 Istio Authors 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package ctrlz 16 17import ( 18 "html/template" 19 "net/http" 20 "os" 21 "path/filepath" 22 "runtime" 23 "strings" 24 "time" 25 26 "github.com/gorilla/mux" 27 28 "istio.io/pkg/ctrlz/assets" 29 "istio.io/pkg/ctrlz/fw" 30) 31 32var mimeTypes = map[string]string{ 33 ".css": "text/css; charset=utf-8", 34 ".svg": "image/svg+xml; charset=utf-8", 35 ".ico": "image/x-icon", 36 ".png": "image/png", 37 ".js": "application/javascript", 38} 39 40type homeInfo struct { 41 ProcessName string 42 HeapSize uint64 43 NumGC uint32 44 CurrentTime int64 45 Hostname string 46 IP string 47} 48 49func getHomeInfo() *homeInfo { 50 var ms runtime.MemStats 51 runtime.ReadMemStats(&ms) 52 53 hostName, _ := os.Hostname() 54 55 return &homeInfo{ 56 ProcessName: os.Args[0], 57 HeapSize: ms.HeapAlloc, 58 NumGC: ms.NumGC, 59 CurrentTime: time.Now().UnixNano(), 60 Hostname: hostName, 61 IP: getLocalIP(), 62 } 63} 64 65func registerHome(router *mux.Router, layout *template.Template) { 66 homeTmpl := template.Must(template.Must(layout.Clone()).Parse(string(assets.MustAsset("templates/home.html")))) 67 errorTmpl := template.Must(template.Must(layout.Clone()).Parse(string(assets.MustAsset("templates/404.html")))) 68 69 _ = router.NewRoute().PathPrefix("/").Methods("GET").HandlerFunc(func(w http.ResponseWriter, req *http.Request) { 70 if req.URL.Path == "/" { 71 // home page 72 fw.RenderHTML(w, homeTmpl, getHomeInfo()) 73 } else if req.URL.Path == "/homej" || req.URL.Path == "/homej/" { 74 fw.RenderJSON(w, http.StatusOK, getHomeInfo()) 75 } else if a, err := assets.Asset("static" + req.URL.Path); err == nil { 76 // static asset 77 ext := strings.ToLower(filepath.Ext(req.URL.Path)) 78 if mime, ok := mimeTypes[ext]; ok { 79 w.Header().Set("Content-Type", mime) 80 } 81 _, _ = w.Write(a) 82 } else { 83 // 'not found' page 84 w.WriteHeader(http.StatusNotFound) 85 fw.RenderHTML(w, errorTmpl, nil) 86 } 87 }) 88 89 _ = router.NewRoute().Methods("PUT").Path("/homej/exit").HandlerFunc(func(w http.ResponseWriter, req *http.Request) { 90 w.WriteHeader(http.StatusAccepted) 91 time.AfterFunc(1*time.Second, func() { 92 os.Exit(0) 93 }) 94 }) 95} 96