[libmicrohttpd] 04/10: transmit_error_response(): avoid double sending of error responses

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karlson2k pushed a commit to branch master
in repository libmicrohttpd.

commit cb5332ab4328374822f3051e6effbfac1f03b815
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
AuthorDate: Wed Sep 29 17:30:15 2021 +0300

    transmit_error_response(): avoid double sending of error responses
---
 src/microhttpd/connection.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/microhttpd/connection.c b/src/microhttpd/connection.c
index 65aa0842..a2049527 100644
--- a/src/microhttpd/connection.c
+++ b/src/microhttpd/connection.c
@@ -2200,6 +2200,14 @@ transmit_error_response_len (struct MHD_Connection 
*connection,
   struct MHD_Response *response;
   enum MHD_Result iret;
 
+  mhd_assert (! connection->stop_with_error); /* Send error one time only */
+  if (connection->stop_with_error)
+  { /* Should not happen */
+    if (MHD_CONNECTION_CLOSED > connection->state)
+      connection->state = MHD_CONNECTION_CLOSED;
+
+    return;
+  }
   connection->stop_with_error = true;
   /* TODO: remove when special error queue function is implemented */
   connection->state = MHD_CONNECTION_FULL_REQ_RECEIVED;

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