How to use Dart http_server:VirtualDirectory - dart

Question

I have been using the dart:route api for serving static files but I noticed that there is a core library called http_server that contains helper classes and functions for dart:io HttpServer.
Of particular interest to me is the class VirtualDirectory which, according to the docs, takes a String Object for the static content of directory and then you call the method serve()
var virtualDirectory = new VirtualDirectory('/var/www/');
virtualDirectory.serve(new HttpServer('0.0.0.0', 8080));
This doesn't work as there is no constructor for HttpServer - at least not in current versions.
virtualDirectory.serve(HttpServer.bind('0.0.0.0', 8080));
Which is how I have been instantiating a server also fails since virtualDirectory.serve() doesn't take a Future<HttpServer> and finally:
virtualDirectory.serve(HttpServer.bind('0.0.0.0', 8080).asStream());
also fails with
The argument type 'Stream' cannot be assigned to the parameter type
'Stream'
So how do I connect a VirtualDirectory to a Server? There are no examples that I can find online and the VirtualDirectory source code does not make it clear. I would RTFM if I could FTFM. Links are fine as answers.

Answer 1

The VirtualDirectory can work from inside the Future returned by HttpServer.bind. You can create a static file web server by using the following five lines of code:
HttpServer.bind('127.0.0.1', 8888).then((HttpServer server) {
VirtualDirectory vd = new VirtualDirectory('../web/');
vd.jailRoot = false;
vd.serve(server);
});
You can make it more sophisticated by parsing the URI and pulling out service requests prior to serving out files.
import 'dart:io';
import 'package:http_server/http_server.dart';
main() {
handleService(HttpRequest request) {
print('New service request');
request.response.write('[{"field":"value"}]');
request.response.close();
};
HttpServer.bind('127.0.0.1', 8888).then((HttpServer server) {
VirtualDirectory vd = new VirtualDirectory('../web/');
vd.jailRoot = false;
server.listen((request) {
print("request.uri.path: " + request.uri.path);
if (request.uri.path == '/services') {
handleService(request);
} else {
print('File request');
vd.serveRequest(request);
}
});
});
}