istio

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// Copyright Istio Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package topics
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import (
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	"net/http"
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	"os"
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	"runtime"
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	"istio.io/istio/pkg/ctrlz/fw"
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	"istio.io/istio/pkg/ctrlz/topics/assets"
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)
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type procTopic struct{}
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// ProcTopic returns a ControlZ topic that allows visualization of process state.
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func ProcTopic() fw.Topic {
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	return procTopic{}
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}
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func (procTopic) Title() string {
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	return "Process Info"
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}
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func (procTopic) Prefix() string {
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	return "proc"
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}
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type procInfo struct {
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	Egid       int    `json:"egid"`
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	Euid       int    `json:"euid"`
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	GID        int    `json:"gid"`
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	Groups     []int  `json:"groups"`
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	Pid        int    `json:"pid"`
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	Ppid       int    `json:"ppid"`
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	UID        int    `json:"uid"`
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	Wd         string `json:"wd"`
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	Hostname   string `json:"hostname"`
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	TempDir    string `json:"tempdir"`
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	Threads    int    `json:"threads"`
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	Goroutines int    `json:"goroutines"`
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}
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func getProcInfo() *procInfo {
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	pi := procInfo{
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		Egid:       os.Getegid(),
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		Euid:       os.Geteuid(),
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		GID:        os.Getgid(),
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		Pid:        os.Getpid(),
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		Ppid:       os.Getppid(),
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		UID:        os.Getuid(),
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		TempDir:    os.TempDir(),
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		Goroutines: runtime.NumGoroutine(),
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	}
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	pi.Groups, _ = os.Getgroups()
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	pi.Wd, _ = os.Hostname()
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	pi.Hostname, _ = os.Hostname()
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	pi.Threads, _ = runtime.ThreadCreateProfile(nil)
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	return &pi
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}
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func (procTopic) Activate(context fw.TopicContext) {
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	tmpl := assets.ParseTemplate(context.Layout(), "templates/proc.html")
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	_ = context.HTMLRouter().StrictSlash(true).NewRoute().Path("/").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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		fw.RenderHTML(w, tmpl, getProcInfo())
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	})
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	_ = context.JSONRouter().StrictSlash(true).NewRoute().Methods("GET").Path("/").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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		fw.RenderJSON(w, http.StatusOK, getProcInfo())
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	})
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}
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