I want to add custom action which opens the external link and passes the current URL as a parameter. Something like: https://external.aspx?&url=https://company.sharepoint.com/sites/testSite/SitePages/Home.aspx

I add custom action with the following PS script.

$context = GetContext($webUrl)
$web = $context.Web
$userCustomActions = $web.UserCustomActions

$siteAction = $context.Web.UserCustomActions.Add();
$siteAction.Group = "SiteActions";
$siteAction.Location = "Microsoft.SharePoint.StandardMenu";
$siteAction.Name = "MyAction";
$siteAction.Sequence = 1000;
$siteAction.Url = "https:\\external.aspx?&url={Source}";
$siteAction.Title = "My Action";


The issue is that the {source} parameter doesn't include the home page part. It includes the site URL only. For example, if I navigate to testSite, the {Source} value will be https://company.sharepoint.com/sites/testSite.

But I need to get https://company.sharepoint.com/sites/testSite/SitePages/Home.aspx.

If I refresh the page or load the Home page specifically the {Source} parameter will contain the correct value. But when I navigate to the page via internal links it doesn't work.

Is there a way to get full URL of the loaded page without JS code?

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