Java SimpleFileServer disable directory listing

Question

For a minimalistic SimpleFileServer pseudocode below, how to disable directory listing?

var server = HttpsServer.create(new InetSocketAddress(port), 2)
server.createContext("/file", SimpleFileServer.createFileHandler(Path.of("d:\file")));
server.start();

Answer 1

If you put an index file (index.html or index.htm) in the directory, then that will be served, rather than the directory contents.

One more thing: you probably want a / at the end of the context path (so "/file/") as per the note in the API:

The path should generally, but is not required to, end with '/'. If the path does not end with '/', eg such as with "/foo" then this would match requests with a path of "/foobar" or "/foo/bar".

Alternatively:

var server = HttpServer.create(new InetSocketAddress(8080), 2);
var fileHandler = SimpleFileServer.createFileHandler(Path.of("d:\file"));
server.createContext("/file/", (exchange) -> {
    if (exchange.getHttpContext().getPath().equals(exchange.getRequestURI().getPath())) {
        try (exchange) {
            exchange.setAttribute("request-path", "could not resolve request URI path");
            exchange.sendResponseHeaders(404, 0);
        }
    } else {
        fileHandler.handle(exchange);
    }
});
server.start();