Append index.html to directories when resolving paths.

httphandlers.go

@@ -57,6 +57,15 @@ func GetHandler(config Config) http.HandlerFunc {
 			http.Error(w, "Permission denied.", http.StatusForbidden)
 			return
 		}
+		// Add index.html to directory paths, if it exists
+		if info.IsDir() {
+			index_path := filepath.Join(path, "index.html")
+			index_info, err := os.Stat(index_path)
+			if !os.IsNotExist(err) {
+				path = index_path
+				info = index_info
+			}
+		}
 		// Fail if file is not world readable
 		if uint64(info.Mode().Perm())&0444 != 0444 {
 			http.Error(w, "File not world-readable.", http.StatusForbidden)