Fix connection close bug when response write over 5 seconds

include/crow/dumb_timer_queue.h

@@ -30,7 +30,7 @@ namespace crow
                     self->dq_[index].second = nullptr;
             }
 
-            key add(std::function<void()> f)
+            key add(std::function<bool()> f)
             {
                 dq_.emplace_back(std::chrono::steady_clock::now(), std::move(f));
                 int ret = step_+dq_.size()-1;
@@ -48,14 +48,18 @@ namespace crow
                 while(!dq_.empty())
                 {
                     auto& x = dq_.front();
+					bool is_remove = true;
                     if (now - x.first < std::chrono::seconds(tick))
                         break;
                     if (x.second)
                     {
                         CROW_LOG_DEBUG << "timer call: " << this << ' ' << step_;
                         // we know that timer handlers are very simple currenty; call here
-                        x.second();
+                        is_remove = x.second();
                     }
+					if (!is_remove)
+						break;
+
                     dq_.pop_front();
                     step_++;
                 }
@@ -74,7 +78,7 @@ namespace crow
 
             int tick{5};
             boost::asio::io_service* io_service_{};
-            std::deque<std::pair<decltype(std::chrono::steady_clock::now()), std::function<void()>>> dq_;
+            std::deque<std::pair<decltype(std::chrono::steady_clock::now()), std::function<bool()>>> dq_;
             int step_{};
         };
     }

include/crow/http_connection.h

@@ -557,9 +557,17 @@ namespace crow
             {
                 if (!adaptor_.is_open())
                 {
-                    return;
+                    return true;
                 }
+
+				if(this->is_writing)
+				{
+					CROW_LOG_DEBUG << this << " timer called functor but didn't close connection in writing";
+					return false;					
+				}
                 adaptor_.close();
+
+				return true;
             });
             CROW_LOG_DEBUG << this << " timer added: " << timer_cancel_key_.first << ' ' << timer_cancel_key_.second;
         }