I think I discovered a bug.

If I host the Nuts middleware on a route such as app.use('/myapp', Nuts.router) in express and GET the /update/:platform/:version/RELEASES route the generated filenames do not include my custom path /myapp if query parameters are present in the requested path. It does not seeem to matter what the query parameters are, only that they are present.

Calling http://myserver.com/myapp/update/:platform/:version/RELEASES generates a RELEASES file containing correct filename URLs with my custom path like so:

... http://myserver.com/myapp/download/x.x.x/...-full.nupkg ...

Calling http://myserver.com/myapp/update/:platform/:version/RELEASES?test=asd generates a RELEASES file containing filename URLs without the /myapp path:

... http://myserver.com/download/x.x.x/...-full.nupkg ...

I've had a quick look through the source code and I think the urljoin.js module does not handle query parameters correctly when transforming the RELEASES filenames.