Add TLS/HTTPS

cmd/app.go

@@ -18,7 +18,10 @@ import (
 func New() *cli.App {
 	flags := []cli.Flag{
 		&cli.StringFlag{Name: "config", Aliases: []string{"c"}, EnvVars: []string{"NTFY_CONFIG_FILE"}, Value: "/etc/ntfy/config.yml", DefaultText: "/etc/ntfy/config.yml", Usage: "config file"},
-		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: config.DefaultListenHTTP, Usage: "ip:port used to as listen address"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-http", Aliases: []string{"l"}, EnvVars: []string{"NTFY_LISTEN_HTTP"}, Value: config.DefaultListenHTTP, Usage: "ip:port used to as HTTP listen address"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "listen-https", Aliases: []string{"L"}, EnvVars: []string{"NTFY_LISTEN_HTTPS"}, Usage: "ip:port used to as HTTPS listen address"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "key-file", Aliases: []string{"K"}, EnvVars: []string{"NTFY_KEY_FILE"}, Usage: "private key file, if listen-https is set"}),
+		altsrc.NewStringFlag(&cli.StringFlag{Name: "cert-file", Aliases: []string{"E"}, EnvVars: []string{"NTFY_CERT_FILE"}, Usage: "certificate file, if listen-https is set"}),
 		altsrc.NewStringFlag(&cli.StringFlag{Name: "firebase-key-file", Aliases: []string{"F"}, EnvVars: []string{"NTFY_FIREBASE_KEY_FILE"}, Usage: "Firebase credentials file; if set additionally publish to FCM topic"}),
 		altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-file", Aliases: []string{"C"}, EnvVars: []string{"NTFY_CACHE_FILE"}, Usage: "cache file used for message caching"}),
 		altsrc.NewDurationFlag(&cli.DurationFlag{Name: "cache-duration", Aliases: []string{"b"}, EnvVars: []string{"NTFY_CACHE_DURATION"}, Value: config.DefaultCacheDuration, Usage: "buffer messages for this time to allow `since` requests"}),
@@ -50,6 +53,9 @@ func New() *cli.App {
 func execRun(c *cli.Context) error {
 	// Read all the options
 	listenHTTP := c.String("listen-http")
+	listenHTTPS := c.String("listen-https")
+	keyFile := c.String("key-file")
+	certFile := c.String("cert-file")
 	firebaseKeyFile := c.String("firebase-key-file")
 	cacheFile := c.String("cache-file")
 	cacheDuration := c.Duration("cache-duration")
@@ -70,10 +76,19 @@ func execRun(c *cli.Context) error {
 		return errors.New("manager interval cannot be lower than five seconds")
 	} else if cacheDuration < managerInterval {
 		return errors.New("cache duration cannot be lower than manager interval")
+	} else if keyFile != "" && !util.FileExists(keyFile) {
+		return errors.New("if set, key file must exist")
+	} else if certFile != "" && !util.FileExists(certFile) {
+		return errors.New("if set, certificate file must exist")
+	} else if listenHTTPS != "" && (keyFile == "" || certFile == "") {
+		return errors.New("if listen-https is set, both key-file and cert-file must be set")
 	}
 
 	// Run server
 	conf := config.New(listenHTTP)
+	conf.ListenHTTPS = listenHTTPS
+	conf.KeyFile = keyFile
+	conf.CertFile = certFile
 	conf.FirebaseKeyFile = firebaseKeyFile
 	conf.CacheFile = cacheFile
 	conf.CacheDuration = cacheDuration

config/config.go

@@ -27,6 +27,9 @@ const (
 // Config is the main config struct for the application. Use New to instantiate a default config struct.
 type Config struct {
 	ListenHTTP                   string
+	ListenHTTPS                   string
+	KeyFile                   string
+	CertFile                   string
 	FirebaseKeyFile              string
 	CacheFile                    string
 	CacheDuration                time.Duration
@@ -43,6 +46,9 @@ type Config struct {
 func New(listenHTTP string) *Config {
 	return &Config{
 		ListenHTTP:                   listenHTTP,
+		ListenHTTPS: "",
+		KeyFile: "",
+		CertFile: "",
 		FirebaseKeyFile:              "",
 		CacheFile:                    "",
 		CacheDuration:                DefaultCacheDuration,

config/config.yml

@@ -5,6 +5,21 @@
 #
 # listen-http: ":80"
 
+# Listen address for the HTTPS web server. If set, you must also set "key-file" and "cert-file".
+# Format: <hostname>:<port>
+#
+# listen-https:
+
+# Path to the private key file for the HTTPS web server. Not used if "listen-https" is not set.
+# Format: <filename>
+#
+# key-file:
+
+# Path to the cert file for the HTTPS web server. Not used if "listen-https" is not set.
+# Format: <filename>
+#
+# cert-file:
+
 # If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app.
 # This is optional and only required to support Android apps (which don't allow background services anymore).
 #

server/server.go

@@ -173,13 +173,23 @@ func (s *Server) Run() error {
 			s.updateStatsAndExpire()
 		}
 	}()
-	return s.listenAndServe()
+	listenStr := fmt.Sprintf("%s/http", s.config.ListenHTTP)
-}
+	if s.config.ListenHTTPS != "" {
+		listenStr += fmt.Sprintf(" %s/https", s.config.ListenHTTPS)
+	}
+	log.Printf("Listening on %s", listenStr)
 
-func (s *Server) listenAndServe() error {
-	log.Printf("Listening on %s", s.config.ListenHTTP)
 	http.HandleFunc("/", s.handle)
-	return http.ListenAndServe(s.config.ListenHTTP, nil)
+	errChan := make(chan error)
+	go func() {
+		errChan <- http.ListenAndServe(s.config.ListenHTTP, nil)
+	}()
+	if s.config.ListenHTTPS != "" {
+		go func() {
+			errChan <- http.ListenAndServeTLS(s.config.ListenHTTPS, s.config.CertFile, s.config.KeyFile, nil)
+		}()
+	}
+	return <-errChan
 }
 
 func (s *Server) handle(w http.ResponseWriter, r *http.Request) {