Implement refcount for http connection.

src/client/rspamdclient.c

@@ -73,7 +73,7 @@ rspamd_client_error_handler (struct rspamd_http_connection *conn, GError *err)
 	req->cb (c, c->server_name->str, NULL, req->ud, err);
 }
 
-static void
+static gint
 rspamd_client_finish_handler (struct rspamd_http_connection *conn,
 		struct rspamd_http_message *msg)
 {
@@ -88,13 +88,14 @@ rspamd_client_finish_handler (struct rspamd_http_connection *conn,
 		c->req_sent = TRUE;
 		rspamd_http_connection_reset (c->http_conn);
 		rspamd_http_connection_read_message (c->http_conn, c->req, c->fd, &c->timeout, c->ev_base);
+		return 0;
 	}
 	else {
 		if (msg->body == NULL || msg->body->len == 0 || msg->code != 200) {
 			err = g_error_new (RCLIENT_ERROR, msg->code, "HTTP error occurred: %d", msg->code);
 			req->cb (c, c->server_name->str, NULL, req->ud, err);
 			g_error_free (err);
-			return;
+			return -1;
 		}
 
 		parser = ucl_parser_new (0);
@@ -104,12 +105,14 @@ rspamd_client_finish_handler (struct rspamd_http_connection *conn,
 			ucl_parser_free (parser);
 			req->cb (c, c->server_name->str, NULL, req->ud, err);
 			g_error_free (err);
-			return;
+			return -1;
 		}
 
 		req->cb (c, c->server_name->str, ucl_parser_get_object (parser), req->ud, NULL);
 		ucl_parser_free (parser);
 	}
+
+	return -1;
 }
 
 struct rspamd_client_connection *
@@ -203,7 +206,7 @@ void
 rspamd_client_destroy (struct rspamd_client_connection *conn)
 {
 	if (conn != NULL) {
-		rspamd_http_connection_free (conn->http_conn);
+		rspamd_http_connection_unref (conn->http_conn);
 		if (conn->req != NULL) {
 			g_slice_free1 (sizeof (struct rspamd_client_request), conn->req);
 		}

src/http.c

@@ -465,14 +465,21 @@ rspamd_http_on_message_complete (http_parser* parser)
 	priv = conn->priv;
 
 	if (conn->body_handler != NULL) {
+		rspamd_http_connection_ref (conn);
 		if (conn->opts & RSPAMD_HTTP_BODY_PARTIAL) {
 			ret = conn->body_handler (conn, priv->msg, NULL, 0);
 		}
 		else {
 			ret = conn->body_handler (conn, priv->msg, priv->msg->body->str, priv->msg->body->len);
 		}
+		rspamd_http_connection_unref (conn);
+	}
+
+	if (ret == 0) {
+		rspamd_http_connection_ref (conn);
+		ret = conn->finish_handler (conn, priv->msg);
+		rspamd_http_connection_unref (conn);
 	}
-	conn->finish_handler (conn, priv->msg);
 
 	return ret;
 }
@@ -490,7 +497,9 @@ rspamd_http_write_helper (struct rspamd_http_connection *conn)
 	priv = conn->priv;
 
 	if (priv->wr_pos == priv->wr_total) {
+		rspamd_http_connection_ref (conn);
 		conn->finish_handler (conn, priv->msg);
+		rspamd_http_connection_unref (conn);
 		return;
 	}
 
@@ -516,7 +525,9 @@ rspamd_http_write_helper (struct rspamd_http_connection *conn)
 
 	if (r == -1) {
 		err = g_error_new (HTTP_ERROR, errno, "IO write error: %s", strerror (errno));
+		rspamd_http_connection_ref (conn);
 		conn->error_handler (conn, err);
+		rspamd_http_connection_unref (conn);
 		g_error_free (err);
 		return;
 	}
@@ -525,7 +536,9 @@ rspamd_http_write_helper (struct rspamd_http_connection *conn)
 	}
 
 	if (priv->wr_pos >= priv->wr_total) {
+		rspamd_http_connection_ref (conn);
 		conn->finish_handler (conn, priv->msg);
+		rspamd_http_connection_unref (conn);
 	}
 	else {
 		/* Want to write more */
@@ -555,19 +568,24 @@ rspamd_http_event_handler (int fd, short what, gpointer ud)
 		}
 		else {
 			buf->len = r;
+			rspamd_http_connection_ref (conn);
 			if (http_parser_execute (&priv->parser, &priv->parser_cb, buf->str, r) != (size_t)r) {
 				err = g_error_new (HTTP_ERROR, priv->parser.http_errno,
 						"HTTP parser error: %s", http_errno_description (priv->parser.http_errno));
 				conn->error_handler (conn, err);
 				g_error_free (err);
+				rspamd_http_connection_unref (conn);
 				return;
 			}
+			rspamd_http_connection_unref (conn);
 		}
 	}
 	else if (what == EV_TIMEOUT) {
 		err = g_error_new (HTTP_ERROR, ETIMEDOUT,
 				"IO timeout");
+		rspamd_http_connection_ref (conn);
 		conn->error_handler (conn, err);
+		rspamd_http_connection_unref (conn);
 		g_error_free (err);
 		return;
 	}
@@ -597,6 +615,7 @@ rspamd_http_connection_new (rspamd_http_body_handler body_handler,
 	new->error_handler = error_handler;
 	new->finish_handler = finish_handler;
 	new->fd = -1;
+	new->ref = 1;
 
 	/* Init priv */
 	priv = g_slice_alloc0 (sizeof (struct rspamd_http_connection_private));

src/http.h

@@ -72,14 +72,14 @@ enum rspamd_http_options {
 struct rspamd_http_connection_private;
 struct rspamd_http_connection;
 
-typedef gboolean (*rspamd_http_body_handler) (struct rspamd_http_connection *conn,
+typedef int (*rspamd_http_body_handler) (struct rspamd_http_connection *conn,
 		struct rspamd_http_message *msg,
 		const gchar *chunk,
 		gsize len);
 
 typedef void (*rspamd_http_error_handler) (struct rspamd_http_connection *conn, GError *err);
 
-typedef void (*rspamd_http_finish_handler) (struct rspamd_http_connection *conn,
+typedef int (*rspamd_http_finish_handler) (struct rspamd_http_connection *conn,
 		struct rspamd_http_message *msg);
 
 /**
@@ -94,6 +94,7 @@ struct rspamd_http_connection {
 	enum rspamd_http_options opts;
 	enum rspamd_http_connection_type type;
 	gint fd;
+	gint ref;
 };
 
 /**
@@ -145,6 +146,30 @@ void rspamd_http_connection_write_message (
  */
 void rspamd_http_connection_free (struct rspamd_http_connection *conn);
 
+/**
+ * Increase refcount for a connection
+ * @param conn
+ * @return
+ */
+static inline struct rspamd_http_connection *
+rspamd_http_connection_ref (struct rspamd_http_connection *conn)
+{
+	conn->ref ++;
+	return conn;
+}
+
+/**
+ * Decrease a refcount for a connection and free it if refcount is equal to zero
+ * @param conn
+ */
+static void
+rspamd_http_connection_unref (struct rspamd_http_connection *conn)
+{
+	if (--conn->ref <= 0) {
+		rspamd_http_connection_free (conn);
+	}
+}
+
 /**
  * Reset connection for a new request
  * @param conn

src/worker.c

@@ -382,7 +382,7 @@ rspamd_worker_error_handler (struct rspamd_http_connection *conn, GError *err)
 	}
 }
 
-static void
+static gint
 rspamd_worker_finish_handler (struct rspamd_http_connection *conn,
 		struct rspamd_http_message *msg)
 {
@@ -400,6 +400,8 @@ rspamd_worker_finish_handler (struct rspamd_http_connection *conn,
 		task->s->wanna_die = TRUE;
 		check_session_pending (task->s);
 	}
+
+	return 0;
 }
 
 /*

src/worker_util.c

@@ -162,7 +162,7 @@ free_task (struct worker_task *task, gboolean is_soft)
 			}
 		}
 		if (task->http_conn != NULL) {
-			rspamd_http_connection_free (task->http_conn);
+			rspamd_http_connection_unref (task->http_conn);
 		}
 		if (task->sock != -1) {
 			close (task->sock);