Add body to benchHandler

Add health with update on POST

app.go

@@ -2,8 +2,12 @@ package main
 
 import (
 	"encoding/json"
+	"flag"
 	"fmt"
+	"sync"
+
 	"github.com/gorilla/websocket"
+	// "github.com/pkg/profile"
 	"log"
 	"net"
 	"net/http"
@@ -12,27 +16,41 @@ import (
 	"time"
 )
 
+var port string
+
+func init() {
+	flag.StringVar(&port, "port", "80", "give me a port number")
+}
+
 var upgrader = websocket.Upgrader{
 	ReadBufferSize:  1024,
 	WriteBufferSize: 1024,
 }
 
 func main() {
+	// defer profile.Start().Stop()
+	flag.Parse()
 	http.HandleFunc("/echo", echoHandler)
+	http.HandleFunc("/bench", benchHandler)
 	http.HandleFunc("/", whoamI)
 	http.HandleFunc("/api", api)
-	fmt.Println("Starting up on 80")
-	log.Fatal(http.ListenAndServe(":80", nil))
+	http.HandleFunc("/health", healthHandler)
+	fmt.Println("Starting up on port " + port)
+	log.Fatal(http.ListenAndServe(":"+port, nil))
 }
 
-func print_binary(s []byte) {
+func printBinary(s []byte) {
 	fmt.Printf("Received b:")
 	for n := 0; n < len(s); n++ {
 		fmt.Printf("%d,", s[n])
 	}
 	fmt.Printf("\n")
 }
-
+func benchHandler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Connection", "keep-alive")
+	w.Header().Set("Content-Type", "text/plain")
+	fmt.Fprint(w, "1")
+}
 func echoHandler(w http.ResponseWriter, r *http.Request) {
 	conn, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
@@ -44,7 +62,7 @@ func echoHandler(w http.ResponseWriter, r *http.Request) {
 		if err != nil {
 			return
 		}
-		print_binary(p)
+		printBinary(p)
 		err = conn.WriteMessage(messageType, p)
 		if err != nil {
 			return
@@ -87,9 +105,11 @@ func api(w http.ResponseWriter, req *http.Request) {
 	data := struct {
 		Hostname string      `json:"hostname,omitempty"`
 		IP       []string    `json:"ip,omitempty"`
+		Headers  http.Header `json:"headers,omitempty"`
 	}{
 		hostname,
 		[]string{},
+		req.Header,
 	}
 
 	ifaces, _ := net.Interfaces()
@@ -109,3 +129,30 @@ func api(w http.ResponseWriter, req *http.Request) {
 	}
 	json.NewEncoder(w).Encode(data)
 }
+
+type healthState struct {
+	StatusCode int
+}
+
+var currentHealthState = healthState{200}
+var mutexHealthState = &sync.RWMutex{}
+
+func healthHandler(w http.ResponseWriter, req *http.Request) {
+	if req.Method == http.MethodPost {
+		var statusCode int
+		err := json.NewDecoder(req.Body).Decode(&statusCode)
+		if err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			w.Write([]byte(err.Error()))
+		} else {
+			fmt.Printf("Update health check status code [%d]\n", statusCode)
+			mutexHealthState.Lock()
+			defer mutexHealthState.Unlock()
+			currentHealthState.StatusCode = statusCode
+		}
+	} else {
+		mutexHealthState.RLock()
+		defer mutexHealthState.RUnlock()
+		w.WriteHeader(currentHealthState.StatusCode)
+	}
+}