/
home.go
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/
home.go
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// Copyright Istio 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 ctrlz
import (
"html/template"
"net/http"
"os"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/gorilla/mux"
"istio.io/istio/pkg/ctrlz/assets"
"istio.io/istio/pkg/ctrlz/fw"
)
var mimeTypes = map[string]string{
".css": "text/css; charset=utf-8",
".svg": "image/svg+xml; charset=utf-8",
".ico": "image/x-icon",
".png": "image/png",
".js": "application/javascript",
}
type homeInfo struct {
ProcessName string
HeapSize uint64
NumGC uint32
CurrentTime int64
Hostname string
IP string
}
func getHomeInfo() *homeInfo {
var ms runtime.MemStats
runtime.ReadMemStats(&ms)
hostName, _ := os.Hostname()
return &homeInfo{
ProcessName: os.Args[0],
HeapSize: ms.HeapAlloc,
NumGC: ms.NumGC,
CurrentTime: time.Now().UnixNano(),
Hostname: hostName,
IP: getLocalIP(),
}
}
func registerHome(router *mux.Router, layout *template.Template) {
homeTmpl := assets.ParseTemplate(template.Must(layout.Clone()), "templates/home.html")
errorTmpl := assets.ParseTemplate(template.Must(layout.Clone()), "templates/404.html")
_ = router.NewRoute().PathPrefix("/").Methods("GET").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if req.URL.Path == "/" {
// home page
fw.RenderHTML(w, homeTmpl, getHomeInfo())
} else if req.URL.Path == "/homej" || req.URL.Path == "/homej/" {
fw.RenderJSON(w, http.StatusOK, getHomeInfo())
} else if a, err := assets.FS.ReadFile("static" + req.URL.Path); err == nil {
// static asset
ext := strings.ToLower(filepath.Ext(req.URL.Path))
if mime, ok := mimeTypes[ext]; ok {
w.Header().Set("Content-Type", mime)
}
_, _ = w.Write(a)
} else {
// 'not found' page
w.WriteHeader(http.StatusNotFound)
fw.RenderHTML(w, errorTmpl, nil)
}
})
_ = router.NewRoute().Methods("PUT").Path("/homej/exit").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.WriteHeader(http.StatusAccepted)
time.AfterFunc(1*time.Second, func() {
os.Exit(0)
})
})
}