How to serve static content using suns simple httpserver

Question

I'm using jersey's HttpServerFactory to create a simple embedded HttpServer that hosts a couple of rest services. We just needed something small quick and lightweight. I need to host a small static html page inside the same server instance. Is there a simple way to add a static handler to the server? Is there a pre-defined handler I can use? It seems like a pretty common task, I'd hate to re-write code for it if it already exists.

server = HttpServerFactory.create(url);
server.setExecutor(Executors.newCachedThreadPool());
server.createContext("/staticcontent", new HttpHandler() {
    @Override
    public void handle(HttpExchange arg0) throws IOException {
        //What goes here?
    }
});
server.start();

Answer 1

This will do the trick, though it does allow anyone to walk the tree by requesting ../../../ You can change ./wwwroot to any valid java filepath.

static class MyHandler implements HttpHandler {
    public void handle(HttpExchange t) throws IOException {
        String root = "./wwwroot";
        URI uri = t.getRequestURI();
        System.out.println("looking for: "+ root + uri.getPath());
        String path = uri.getPath();
        File file = new File(root + path).getCanonicalFile();

        if (!file.isFile()) {
          // Object does not exist or is not a file: reject with 404 error.
          String response = "404 (Not Found)\n";
          t.sendResponseHeaders(404, response.length());
          OutputStream os = t.getResponseBody();
          os.write(response.getBytes());
          os.close();
        } else {
          // Object exists and is a file: accept with response code 200.
          String mime = "text/html";
          if(path.substring(path.length()-3).equals(".js")) mime = "application/javascript";
          if(path.substring(path.length()-3).equals("css")) mime = "text/css";            

          Headers h = t.getResponseHeaders();
          h.set("Content-Type", mime);
          t.sendResponseHeaders(200, 0);              

          OutputStream os = t.getResponseBody();
          FileInputStream fs = new FileInputStream(file);
          final byte[] buffer = new byte[0x10000];
          int count = 0;
          while ((count = fs.read(buffer)) >= 0) {
            os.write(buffer,0,count);
          }
          fs.close();
          os.close();
        }  
    }
}