Implement timeouts when running a command

src/TJAlien.cxx

@@ -180,7 +180,8 @@ TGridResult *TJAlien::Command(const char *command, bool interactive, UInt_t stre
     {
         if (interactive) Info("Command", "Received only command");
         result = (TJAlienResult*) connection.RunJsonCommand(sCmd, 0);
-        TJAlienResultRewriter().Rewrite((std::string)*sCmd, result);
+        if (result)
+			TJAlienResultRewriter().Rewrite((std::string)*sCmd, result);
     }
     else
     {
@@ -230,7 +231,8 @@ TGridResult *TJAlien::Command(const char *command, bool interactive, UInt_t stre
 
         TString *s = new TString(sCommand->GetString());
         result = (TJAlienResult*) connection.RunJsonCommand(s, options);
-        TJAlienResultRewriter().Rewrite(sCommand->GetString().Data(), result);
+        if (result)
+			TJAlienResultRewriter().Rewrite(sCommand->GetString().Data(), result);
 
         if (interactive)
         {

src/TJAlienConnectionManager.cxx

@@ -167,6 +167,8 @@ void TJAlienConnectionManager::MakeWebsocketConnection(TJAlienCredentialsObject
     creation_info.options = 0;
     creation_info.vhost_name = "tjalien-root";
     creation_info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
+    creation_info.ws_ping_pong_interval = 10;
+    creation_info.timeout_secs = 5;
 
     // TODO (nhardi): switch to explicit key/cert contents
     // see the context_creation_info