/
signals.go
56 lines (46 loc) · 1.59 KB
/
signals.go
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// Copyright 2019 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 topics
import (
"net/http"
"os"
"syscall"
"istio.io/istio/pkg/ctrlz/fw"
"istio.io/istio/pkg/ctrlz/topics/assets"
)
type signalsTopic struct{}
// SignalsTopic returns a ControlZ topic that sends command signals to the process
func SignalsTopic() fw.Topic {
return signalsTopic{}
}
func (signalsTopic) Title() string {
return "Signals"
}
func (signalsTopic) Prefix() string {
return "signal"
}
func (signalsTopic) Activate(context fw.TopicContext) {
tmpl := assets.ParseTemplate(context.Layout(), "templates/signals.html")
_ = context.HTMLRouter().StrictSlash(true).NewRoute().Path("/").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
fw.RenderHTML(w, tmpl, nil)
})
_ = context.JSONRouter().StrictSlash(true).NewRoute().Methods("PUT", "POST").Path("/SIGUSR1").HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
err := syscall.Kill(os.Getpid(), syscall.SIGUSR1)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusAccepted)
})
}