Mercurial > hg > nginx-quic
changeset 8374:1ebd78df4ce7
Fixed handling of already closed connections.
In limit_req, auth_delay, and upstream code to check for broken
connections, tests for possible connection close by the client
did not work if the connection was already closed when relevant
event handler was set. This happened because there were no additional
events in case of edge-triggered event methods, and read events
were disabled in case of level-triggered ones.
Fix is to explicitly post a read event if the c->read->ready flag
is set.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sun, 28 Mar 2021 17:45:39 +0300 |
parents | 1bf8ab7063de |
children | 2fe9ee63ddcf |
files | src/http/modules/ngx_http_limit_req_module.c src/http/ngx_http_core_module.c src/http/ngx_http_upstream.c |
diffstat | 3 files changed, 22 insertions(+), 7 deletions(-) [+] |
line wrap: on
line diff
--- a/src/http/modules/ngx_http_limit_req_module.c +++ b/src/http/modules/ngx_http_limit_req_module.c @@ -310,8 +310,13 @@ ngx_http_limit_req_handler(ngx_http_requ r->main->limit_req_status = NGX_HTTP_LIMIT_REQ_DELAYED; - if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { - return NGX_HTTP_INTERNAL_SERVER_ERROR; + if (r->connection->read->ready) { + ngx_post_event(r->connection->read, &ngx_posted_events); + + } else { + if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } } r->read_event_handler = ngx_http_test_reading;
--- a/src/http/ngx_http_core_module.c +++ b/src/http/ngx_http_core_module.c @@ -1190,8 +1190,13 @@ ngx_http_core_auth_delay(ngx_http_reques ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, "delaying unauthorized request"); - if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { - return NGX_HTTP_INTERNAL_SERVER_ERROR; + if (r->connection->read->ready) { + ngx_post_event(r->connection->read, &ngx_posted_events); + + } else { + if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { + return NGX_HTTP_INTERNAL_SERVER_ERROR; + } } r->read_event_handler = ngx_http_test_reading;
--- a/src/http/ngx_http_upstream.c +++ b/src/http/ngx_http_upstream.c @@ -608,9 +608,14 @@ ngx_http_upstream_init_request(ngx_http_ if (!u->store && !r->post_action && !u->conf->ignore_client_abort) { - if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { - ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); - return; + if (r->connection->read->ready) { + ngx_post_event(r->connection->read, &ngx_posted_events); + + } else { + if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { + ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); + return; + } } r->read_event_handler = ngx_http_upstream_rd_check_broken_connection;