github.com/elfadel/cilium@v1.6.12/pkg/health/probe/responder/responder.go (about) 1 // Copyright 2019 Authors of Cilium 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 15 package responder 16 17 // this implementation is intentionally kept with minimal dependencies 18 // as this package typically runs in its own process 19 import ( 20 "context" 21 "fmt" 22 "net/http" 23 "time" 24 ) 25 26 // DefaultTimeout used for shutdown 27 var DefaultTimeout = 30 * time.Second 28 29 // Server wraps a minimal http server for the /hello endpoint 30 type Server struct { 31 httpServer http.Server 32 } 33 34 // NewServer creates a new server listening on the given port 35 func NewServer(port int) *Server { 36 return &Server{ 37 http.Server{ 38 Addr: fmt.Sprintf(":%d", port), 39 Handler: http.HandlerFunc(serverRequests), 40 }, 41 } 42 } 43 44 // Serve http requests until shut down 45 func (s *Server) Serve() error { 46 return s.httpServer.ListenAndServe() 47 } 48 49 // Shutdown server gracefully 50 func (s *Server) Shutdown() error { 51 ctx, cancel := context.WithTimeout(context.Background(), DefaultTimeout) 52 defer cancel() 53 return s.httpServer.Shutdown(ctx) 54 } 55 56 func serverRequests(w http.ResponseWriter, r *http.Request) { 57 if r.URL.Path == "/hello" { 58 w.WriteHeader(http.StatusOK) 59 } else { 60 w.WriteHeader(http.StatusNotFound) 61 } 62 }