Add HTTP Basic Auth

config.go

@@ -14,6 +14,11 @@ type Config struct {
 	HTTP struct{
 		Listen string `yaml:"listen"`
 	} `yaml:"http"`
+	Auth struct{
+		Enabled bool `yaml:"enabled"`
+		Username string `yaml:"username"`
+		Password string `yaml:"password"`
+	} `yaml:"auth"`
 	Checks struct{
 		HDD checks.HDDConfig `yaml:"hdd"`
 		Load checks.LoadConfig `yaml:"load"`

config.yml

@@ -1,6 +1,11 @@
 http:
   listen: ":3003"
 
+auth:
+  enabled: false
+  username: test
+  password: test
+
 checks:
   hdd:
     max_percent: 80

main.go

@@ -25,9 +25,31 @@ func init()  {
 	checkList = append(checkList, checks.HDD{c.Checks.HDD}, checks.Memory{Config: c.Checks.Memory}, checks.Load{Config: c.Checks.Load}, checks.Systemd{Config: c.Checks.Systemd})
 }
 
+func auth(fn http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if c.Auth.Enabled {
+			user, pass, _ := r.BasicAuth()
+			if !check(user, pass) {
+				w.Header().Set("WWW-Authenticate", `Basic realm="MY REALM"`)
+				http.Error(w, "Unauthorized.", 401)
+				return
+			}
+		}
+		fn(w, r)
+	}
+}
+
+func check(u, p string) bool {
+	if u == c.Auth.Username && p == c.Auth.Password {
+		return true
+	}
+	return false
+}
+
+
 func main() {
 
-	http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
+	http.HandleFunc("/", auth(func(writer http.ResponseWriter, request *http.Request) {
 		res, gloableRes := checkSystem()
 		if gloableRes == false {
 			writer.WriteHeader(http.StatusInternalServerError)
@@ -41,8 +63,8 @@ func main() {
 		t.Execute(writer, map[string]interface{}{"checks":res, "version": version})
 
 		//writer.Write([]byte(s))
-	})
-	http.HandleFunc("/data.json", handler)
+	}))
+	http.HandleFunc("/data.json", auth(handler))
 	err := http.ListenAndServe(c.HTTP.Listen, nil)
 	log.Fatal().Err(err).Msg("Shutdown")
 }