ServiceApi

serviceapi.go

package serviceapi

import (
	"fmt"
	"net/http"
)

const (
	// RootPath is the root path of the server
	RootPath = "/"
	// HealthCheckPath is the health check path for k8s
	HealthCheckPath = "/_ah/health"
	// PingPath is the ping path for k8s
	PingPath = "/services/ping"
	// OkResponse is the answer k8s health check expects
	OkResponse = "ok"
	// PingResponse is the answer k8s ping expects
	PingResponse = "PONG"
)

// HealthCheck handles health checks responding with OkResponse
func HealthCheck(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintln(w, OkResponse)
}

// Ping handles pings responding with PingResponse
func Ping(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintln(w, PingResponse)
}

// Root redirects to health check path
func Root(w http.ResponseWriter, r *http.Request) {
	if r.URL.Path != RootPath {
		http.NotFound(w, r)
		return
	}
	http.Redirect(w, r, HealthCheckPath, http.StatusFound)
}

//Handlers registers functions to handle known service pathes
func Handlers() *http.ServeMux {
	mux := http.NewServeMux()

	mux.HandleFunc(HealthCheckPath, HealthCheck)
	mux.HandleFunc(PingPath, Ping)
	mux.HandleFunc(RootPath, Root)

	return mux
}