Prefixing matomo first party cookies generating extra cookie

Support & Bugs
1

Hi ,

We have a situation where we cannot use matomo default first party cookies as there is already matomo working . Is there a way to rename/prefix matomo default first party cookies or what could be the alternative solution ?

Thanks
Saqib

2

Just an update I used setCookieNamePrefix but still there is one extra cookie with default name.

Is this a bug ?

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image864×127 3.58 KB

3

Hi all, this is on version 3 but we’ve tried two different versions and it always creates that third cookie unnecessarily. We haven’t tested on version 4 but that’s too new to upgrade to at the moment. Can it at least be confirmed that it is a bug that needs fixing? The Matomo documentation (https://developer.matomo.org/api-reference/tracking-javascript) states that SetCookieNamePrefix should amend all the cookies so needs fixing if this isn’t the case.

4

Hi,

Looks it has been solved in matomo 4.0.0

And as work around we used following javascript tracking code:

    <script type="text/javascript">
	
    (function () {
       var u=(("https:" == document.location.protocol) ? "https" : "http") + "://www.example-domain.com/matomo3.4/";
        var d = document, g = d.createElement("script"), s = d.getElementsByTagName("script")[0]; g.type = "text/javascript";
        g.defer = true; g.async = true; g.src = u + "matomo.js"; s.parentNode.insertBefore(g, s);
    })();
	
    window.piwikAsyncInit = function () {
        try {
             var u=(("https:" == document.location.protocol) ? "https" : "http") + "://www.example-domain.com/matomo3.4/matomo.php";
			 
			 var Tracker = Piwik.getTracker();
				 Tracker.setCookieNamePrefix("_dso_");
				 Tracker.setSiteId( 1 );
				 Tracker.setTrackerUrl( u );
				 Tracker.trackPageView();
			
        } catch( err ) {
			
			console.log(err);
		}
    };
</ script>

Regards,
Saqib