beremiz

SVGHMI: enable periodical reconnect when browser is QtWebengine, working around memory leak with websocket on Qt's embedded Chromium.

2022-10-28, Edouard Tisserant
9256c344c2da
Parents 61fa60130ad6
Children e3a29c5b74c4
SVGHMI: enable periodical reconnect when browser is QtWebengine, working around memory leak with websocket on Qt's embedded Chromium.
1 files changed, 11 insertions(+), 10 deletions(-)
  • +11 -10
    svghmi/svghmi.js
    • --- a/svghmi/svghmi.js Thu Oct 27 10:52:24 2022 +0200
    +++ b/svghmi/svghmi.js Fri Oct 28 09:44:33 2022 +0200
    @@ -586,20 +586,21 @@
    switch_page(default_page);
    var reconnect_delay = 0;
    -// var periodic_reconnect_timer;
    +var periodic_reconnect_timer;
    // Once connection established
    function ws_onopen(evt) {
    - /*
    - // to force reconnect every hour
    - if(periodic_reconnect_timer){
    - window.clearTimeout(periodic_reconnect_timer);
    + // Work around memory leak with websocket on QtWebEngine
    + // reconnect every hour to force deallocate websocket garbage
    + if(window.navigator.userAgent.includes("QtWebEngine")){
    + if(periodic_reconnect_timer){
    + window.clearTimeout(periodic_reconnect_timer);
    + }
    + periodic_reconnect_timer = window.setTimeout(() => {
    + ws.close();
    + periodic_reconnect_timer = null;
    + }, 3600000);
    }
    - periodic_reconnect_timer = window.setTimeout(() => {
    - ws.close();
    - periodic_reconnect_timer = null;
    - }, 3600*1000);
    - */
    // forget subscriptions remotely
    send_reset();