Support keep-alive vrequest reset, which keeps some request data to be shown in mod_status

include/lighttpd/virtualrequest.h

@@ -107,7 +107,10 @@ struct liVRequest {
 
 LI_API liVRequest* li_vrequest_new(liConnection *con, liVRequestHandlerCB handle_response_headers, liVRequestHandlerCB handle_response_body, liVRequestHandlerCB handle_response_error, liVRequestHandlerCB handle_request_headers);
 LI_API void li_vrequest_free(liVRequest *vr);
-LI_API void li_vrequest_reset(liVRequest *vr);
+/* if keepalive = TRUE, you either have to reset it later again with FALSE or call li_vrequest_start before reusing the vr;
+ * keepalive = TRUE doesn't reset the vr->request fields, so mod_status can show the last request data in the keep-alive state
+ */
+LI_API void li_vrequest_reset(liVRequest *vr, gboolean keepalive);
 
 LI_API liVRequestRef* li_vrequest_acquire_ref(liVRequest *vr);
 LI_API liVRequest* li_vrequest_release_ref(liVRequestRef *vr_ref);
@@ -122,6 +125,8 @@ LI_API void li_vrequest_backend_overloaded(liVRequest *vr);
 LI_API void li_vrequest_backend_dead(liVRequest *vr);
 LI_API void li_vrequest_backend_error(liVRequest *vr, liBackendError berror);
 
+/* resets fields which weren't reset in favor of keep-alive tracking */
+LI_API void li_vrequest_start(liVRequest *vr);
 /* received all request headers */
 LI_API void li_vrequest_handle_request_headers(liVRequest *vr);
 /* received (partial) request content */

src/main/connection.c

@@ -117,15 +117,12 @@ static void li_connection_internal_error(liConnection *con) {
 		}
 		li_connection_error(con);
 	} else {
-		liHttpVersion v;
 		if (CORE_OPTION(LI_CORE_OPTION_DEBUG_REQUEST_HANDLING).boolean) {
 			VR_DEBUG(vr, "%s", "internal error");
 		}
 
-		/* We only need the http version from the http request */
-		v = con->mainvr->request.http_version;
-		li_vrequest_reset(con->mainvr);
-		con->mainvr->request.http_version = v;
+		/* We only need the http version from the http request, "keep-alive" reset doesn't reset it */
+		li_vrequest_reset(con->mainvr, TRUE);
 
 		con->keep_alive = FALSE;
 		con->mainvr->response.http_status = 500;
@@ -160,6 +157,7 @@ static gboolean connection_handle_read(liConnection *con) {
 		con->state = LI_CON_STATE_READ_REQUEST_HEADER;
 		con->ts = CUR_TS(con->wrk);
 
+		li_vrequest_start(con->mainvr);
 	} else {
 		if (con->state == LI_CON_STATE_REQUEST_START)
 			con->state = LI_CON_STATE_READ_REQUEST_HEADER;
@@ -517,7 +515,7 @@ void li_connection_reset(liConnection *con) {
 	}
 	ev_io_set(&con->sock_watcher, -1, 0);
 
-	li_vrequest_reset(con->mainvr);
+	li_vrequest_reset(con->mainvr, FALSE);
 	li_http_request_parser_reset(&con->req_parser_ctx);
 
 	g_string_truncate(con->remote_addr_str, 0);
@@ -626,7 +624,7 @@ static void li_connection_reset_keep_alive(liConnection *con) {
 
 	con->raw_out->is_closed = FALSE;
 
-	li_vrequest_reset(con->mainvr);
+	li_vrequest_reset(con->mainvr, TRUE);
 	li_http_request_parser_reset(&con->req_parser_ctx);
 
 	con->ts = CUR_TS(con->wrk);

src/main/virtualrequest.c

@@ -206,7 +206,7 @@ void li_vrequest_free(liVRequest* vr) {
 	g_slice_free(liVRequest, vr);
 }
 
-void li_vrequest_reset(liVRequest *vr) {
+void li_vrequest_reset(liVRequest *vr, gboolean keepalive) {
 	li_action_stack_reset(vr, &vr->action_stack);
 	li_plugins_handle_vrclose(vr);
 	{
@@ -219,7 +219,8 @@ void li_vrequest_reset(liVRequest *vr) {
 
 	vr->backend = NULL;
 
-	li_request_reset(&vr->request);
+	/* don't reset request for keep-alive tracking */
+	if (!keepalive) li_request_reset(&vr->request);
 	li_physical_reset(&vr->physical);
 	li_response_reset(&vr->response);
 	li_environment_reset(&vr->env);
@@ -290,6 +291,13 @@ void li_vrequest_backend_dead(liVRequest *vr) {
 }
 
 
+/* resets fields which weren't reset in favor of keep-alive tracking */
+void li_vrequest_start(liVRequest *vr) {
+	if (LI_VRS_CLEAN == vr->state) {
+		li_request_reset(&vr->request);
+	}
+}
+
 /* received all request headers */
 void li_vrequest_handle_request_headers(liVRequest *vr) {
 	if (LI_VRS_CLEAN == vr->state) {