Dart server for Heroku

httpserver.dart

#import('dart:io');
#import('dart:json');

main() {
  var server = new HttpServer();
  int port = Math.parseInt(Platform.environment['PORT']);
  server.listen('0.0.0.0', port);
  print('Server started on port: ${port}');

  server.defaultRequestHandler = (HttpRequest request, HttpResponse response) {

    var resp = JSON.stringify({
      'Dart on Heroku': true,
      'Buildpack URL': 'https://github.com/igrigorik/heroku-buildpack-dart',
      'Environment': Platform.environment,
      'Hello': 'Intertubes'
    });

    response.headers.set(HttpHeaders.CONTENT_TYPE, 'application/json');
    response.outputStream.writeString(resp);
    response.outputStream.close();
  };
}

Procfile

web: dart main.dart

http://blog.sethladd.com/2012/08/running-dart-in-cloud-with-heroku.html