Do not send data if we are connected, send it only once we actually are

src/network/socket_handler.cpp

@@ -238,7 +238,14 @@ void SocketHandler::send_data(std::string&& data)
   if (data.empty())
     return ;
   this->out_buf.emplace_back(std::move(data));
-  this->poller->watch_send_events(this);
+  if (this->connected)
+    this->poller->watch_send_events(this);
+}
+
+void SocketHandler::send_pending_data()
+{
+  if (this->connected && !this->out_buf.empty())
+    this->poller->watch_send_events(this);
 }
 
 bool SocketHandler::is_connected() const

src/network/socket_handler.hpp

@@ -51,6 +51,10 @@ public:
    * notified when a send event is ready.
    */
   void send_data(std::string&& data);
+  /**
+   * Watch the socket for send events, if our out buffer is not empty.
+   */
+  void send_pending_data();
   /**
    * Returns the socket that should be handled by the poller.
    */