feature/25 :: Added basic auth to webUI

README.md

@@ -51,6 +51,7 @@ Configuration can be done through config file or environment variables
 | DBPATH    | Path to Database | /data/db.sqlite |
 | GUIIP     | Address for web GUI | localhost (127.0.0.1) |
 | GUIPORT   | Port for web GUI | 8840 |
+| GUIAUTH   | Basic auth credentials for web GUI, e.g.: GUIAUTH=user:pass  | (empty - no auth) |
 | TIMEOUT   | Time between scans (seconds) | 60 (1 minute) |
 | SHOUTRRR_URL | Url to any notification service supported by [Shoutrrr](https://github.com/containrrr/shoutrrr/tree/main/docs/services) (gotify, email, telegram and others) | "" |
 | THEME | Any theme name from https://bootswatch.com in lowcase | solar |

src/getconfig.go

@@ -11,6 +11,7 @@ func get_config() (config Conf) {
 	viper.SetDefault("DBPATH", "/data/db.sqlite")
 	viper.SetDefault("GUIIP", "localhost")
 	viper.SetDefault("GUIPORT", "8840")
+	viper.SetDefault("GUIAUTH", "")
 	viper.SetDefault("TIMEOUT", "60")
 	viper.SetDefault("SHOUTRRR_URL", "")
 	viper.SetDefault("THEME", "solar")
@@ -25,6 +26,7 @@ func get_config() (config Conf) {
 	config.DbPath = viper.Get("DBPATH").(string)
 	config.GuiIP = viper.Get("GUIIP").(string)
 	config.GuiPort = viper.Get("GUIPORT").(string)
+	config.GuiAuth = viper.Get("GUIAUTH").(string)
 	config.Timeout = viper.GetInt("TIMEOUT")
 	config.ShoutUrl = viper.Get("SHOUTRRR_URL").(string)
 	config.Theme = viper.Get("THEME").(string)

src/main.go

@@ -20,9 +20,10 @@ type Conf struct {
 	DbPath   string
 	GuiIP    string
 	GuiPort  string
-    Timeout  int
+	GuiAuth  string
 	ShoutUrl string
 	Theme    string
+	Timeout  int
 }
 
 var AppConfig Conf

src/web-index.go

@@ -2,9 +2,9 @@ package main
 
 import (
 	"fmt"
+	"html/template"
 	"log"
 	"net/http"
-  "html/template"
 	"strconv"
 )
 
@@ -48,6 +48,27 @@ func update_host(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, r.Header.Get("Referer"), 302)
 }
 
+func basicAuth(next http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if AppConfig.GuiAuth == "" {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		username, password, ok := r.BasicAuth()
+		if ok {
+			userCredentials := fmt.Sprintf(`%s:%s`, username, password)
+			if userCredentials == AppConfig.GuiAuth {
+				next.ServeHTTP(w, r)
+				return
+			}
+		}
+
+		w.Header().Set("WWW-Authenticate", `Basic realm="restricted", charset="UTF-8"`)
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+	}
+}
+
 func webgui() {
 	// fmt.Println(FoundHosts)
 	address := AppConfig.GuiIP + ":" + AppConfig.GuiPort
@@ -56,13 +77,13 @@ func webgui() {
 	log.Println(fmt.Sprintf("Web GUI at http://%s", address))
 	log.Println("=================================== ")
 
-	http.HandleFunc("/", index)
-	http.HandleFunc("/home/", home)
-	http.HandleFunc("/offline/", offline)
-	http.HandleFunc("/online/", online)
-	http.HandleFunc("/search_hosts/", search_hosts)
-	http.HandleFunc("/sort_hosts/", sort_hosts)
-	http.HandleFunc("/theme/", theme)
-	http.HandleFunc("/update_host/", update_host)
+	http.HandleFunc("/", basicAuth(index))
+	http.HandleFunc("/home/", basicAuth(home))
+	http.HandleFunc("/offline/", basicAuth(offline))
+	http.HandleFunc("/online/", basicAuth(online))
+	http.HandleFunc("/search_hosts/", basicAuth(search_hosts))
+	http.HandleFunc("/sort_hosts/", basicAuth(sort_hosts))
+	http.HandleFunc("/theme/", basicAuth(theme))
+	http.HandleFunc("/update_host/", basicAuth(update_host))
 	http.ListenAndServe(address, nil)
 }