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diff --git a/src/AbstractHttpServerResponseCommand.cc b/src/AbstractHttpServerResponseCommand.cc
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+++ b/src/AbstractHttpServerResponseCommand.cc
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+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2012 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "AbstractHttpServerResponseCommand.h"
+#include "SocketCore.h"
+#include "DownloadEngine.h"
+#include "HttpServer.h"
+#include "Logger.h"
+#include "LogFactory.h"
+#include "HttpServerCommand.h"
+#include "RequestGroupMan.h"
+#include "RecoverableException.h"
+#include "wallclock.h"
+#include "util.h"
+#include "fmt.h"
+
+namespace aria2 {
+
+AbstractHttpServerResponseCommand::AbstractHttpServerResponseCommand
+(cuid_t cuid,
+ const SharedHandle<HttpServer>& httpServer,
+ DownloadEngine* e,
+ const SharedHandle<SocketCore>& socket)
+ : Command(cuid),
+   e_(e),
+   socket_(socket),
+   httpServer_(httpServer)
+{
+  setStatus(Command::STATUS_ONESHOT_REALTIME); 
+  e_->addSocketForWriteCheck(socket_, this);
+}
+
+AbstractHttpServerResponseCommand::~AbstractHttpServerResponseCommand()
+{
+  e_->deleteSocketForWriteCheck(socket_, this);
+}
+
+bool AbstractHttpServerResponseCommand::execute()
+{
+  if(e_->getRequestGroupMan()->downloadFinished() || e_->isHaltRequested()) {
+    return true;
+  }
+  try {
+    httpServer_->sendResponse();
+  } catch(RecoverableException& e) {
+    A2_LOG_INFO_EX
+      (fmt("CUID#%lld - Error occurred while transmitting response body.",
+           getCuid()),
+       e);
+    return true;
+  }
+  if(httpServer_->sendBufferIsEmpty()) {
+    A2_LOG_INFO(fmt("CUID#%lld - HttpServer: all response transmitted.",
+                    getCuid()));
+    afterSend(httpServer_, e_);
+    return true;
+  } else {
+    if(timeoutTimer_.difference(global::wallclock()) >= 10) {
+      A2_LOG_INFO(fmt("CUID#%lld - HttpServer: Timeout while trasmitting"
+                      " response.",
+                      getCuid()));
+      return true;
+    } else {
+      e_->addCommand(this);
+      return false;
+    }
+  }
+}
+
+} // namespace aria2