Incorrect CSS virtual path to absolute path transformation

[jahav]

Hello,
we have an app that is running in the server/MyApp path.

We are using System.Web.Optimization.CssRewriteUrlTransformFixed() to transform URL, but because we are not in root, but MyApp path, relative paths are resolved incorrectly.

Basically
we have something like

var urlTransform = new System.Web.Optimization.CssRewriteUrlTransformFixed();
bundles.Add(new LessBundle("~/Shared/CSS/common")
    .CheckAndInclude("~/Shared/CSS/external/jquery-ui/jquery-ui.css", urlTransform));

and in jquery-ui.css is

.ui-widget-content {
    background: url("images/ui.png");
}

and the transformed URL in CSS is

/Shared/CSS/external/jquery-ui/images/ui.png

instead of

/MyApp/Shared/CSS/external/jquery-ui/images/ui.png

See also http://aspnetoptimization.codeplex.com/workitem/83 and http://stackoverflow.com/a/17702773/2622707.

As a workaround we are using a copy as CssRewriteUrlTransformFixed with following line

var directory = "~" + VirtualPathUtility.GetDirectory(includedVirtualPath.Substring(1));

although I think would work as well

var directory = VirtualPathUtility.GetDirectory(includedVirtualPath);

Is there some reason for stripping tilda from path? If not, would it be possible to fix this?

Thank you very much.

[benmccallum]

Hi @jahav,

Sorry it has taken me so long to get to this. I have updated the codebase with your suggested fix of removing the .Substring(1), as the VirtualPathUtility methods should handle both scenarios. Thanks for the thorough issue report!

I've release to NuGet the fix as version 2.0.3.
https://www.nuget.org/packages/AspNetBundling/2.0.3

Cheers,
Ben