simple hello world web app example

README.md

@@ -24,6 +24,8 @@ $> git push heroku master
 $> curl http://myapp_name.herokuapp.com/
 ```
 
+See `test-app` directory for the world simplest Dart web app running on Heroku: [dartvm.herokuapp.com](http://dartvm.herokuapp.com/)
+
 ## License
 
 The MIT License - Copyright (c) 2012 Ilya Grigorik

test-app/main.dart

@@ -1,3 +1,22 @@
+#import('dart:io');
+#import('dart:json');
+
 main() {
-  print('Hello, Dart!');
+  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}
+    );
+
+    response.headers.set(HttpHeaders.CONTENT_TYPE, 'application/json');
+    response.outputStream.writeString(resp);
+    response.outputStream.close();
+  };
 }