add support for serving TLS

README.md

@@ -14,4 +14,7 @@ use:
     # allow serving hidden files/dirs
     servedir -hidden
 
+    # serve https, with http redirect
+    TLS_CERT=/path/to/cert.pem TLS_KEY=/path/to/key.pem servedir
+
     # or see -help

main.go

@@ -22,7 +22,8 @@ const postBody = `
 </html>
 `
 
-var port = flag.Int("port", 8000, "port from which to serve")
+var port = flag.Int("port", 8000, "port from which to serve http")
+var tlsport = flag.Int("tlsport", 8443, "port from which to serve https")
 var hidden = flag.Bool("hidden", false, "allow serving hidden dirs")
 var canUpload = flag.Bool("upload", false, "enable upload interface")
 
@@ -76,15 +77,38 @@ func main() {
 	if err != nil {
 		log.Fatal("problem getting hostname:", err)
 	}
-	log.Printf("serving on: http://%s:%d/", hostname, *port)
 	addr := fmt.Sprintf(":%d", *port)
+	tlsaddr := fmt.Sprintf(":%d", *tlsport)
 
 	http.Handle("/", logger(http.FileServer(http.Dir("./"))))
 	if *canUpload {
 		log.Printf("WARNING: uploading enabled")
 		http.HandleFunc("/upload/", upload)
 	}
+
+	key := os.Getenv("TLS_KEY")
+	cert := os.Getenv("TLS_CERT")
+	url := fmt.Sprintf("http://%s:%d/", hostname, *tlsport)
+	if key != "" && cert != "" {
+		tlsUrl := fmt.Sprintf("https://%s:%d/", hostname, *tlsport)
+		go func() {
+			log.Printf("serving redirect on: %s", url)
+			sm := http.NewServeMux()
+			sm.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
+				http.Redirect(w, req, tlsUrl, http.StatusPermanentRedirect)
+			})
+			if err := http.ListenAndServe(addr, sm); err != nil {
+				log.Fatal(err)
+			}
+		}()
+		log.Printf("serving on: %s", tlsUrl)
+		if err := http.ListenAndServeTLS(tlsaddr, cert, key, nil); err != nil {
+			log.Fatal(err)
+		}
+	} else {
+		log.Printf("serving on: %s", url)
 		if err := http.ListenAndServe(addr, nil); err != nil {
 			log.Fatal(err)
 		}
+	}
 }