HTTP/2: write logs when refusing streams with data.

Refusing streams is known to be incorrectly handled at least by IE, Edge
and Safari.  Make sure to provide appropriate logging to simplify fixing
this in the affected browsers.

diff --git a/src/http/v2/ngx_http_v2.c b/src/http/v2/ngx_http_v2.c
index c88e29728a4e2c693dae0ae135dc72601a8b08e2..e960aaacbbdc79a79cf4c920f972c87b9090b0de 100644 (file)
--- a/src/http/v2/ngx_http_v2.c
+++ b/src/http/v2/ngx_http_v2.c
@@ -1060,6 +1060,10 @@ ngx_http_v2_state_headers(ngx_http_v2_connection_t *h2c, u_char *pos,
 
     if (!h2c->settings_ack && !(h2c->state.flags & NGX_HTTP_V2_END_STREAM_FLAG))
     {
+        ngx_log_error(NGX_LOG_INFO, h2c->connection->log, 0,
+                      "client sent stream with data "
+                      "before settings were acknowledged");
+
         status = NGX_HTTP_V2_REFUSED_STREAM;
         goto rst_stream;
     }