How to use

sendNotFound

method

in

reactor.netty.http.server.HttpServerResponse

@Override
public HttpServerRoutes directory(String uri, Path directory,
    Function<HttpServerResponse, HttpServerResponse> interceptor) {
  Objects.requireNonNull(directory, "directory");
  return route(HttpPredicate.prefix(uri), (req, resp) -> {
    String prefix = URI.create(req.uri())
              .getPath()
              .replaceFirst(uri, "");
    if(prefix.charAt(0) == '/'){
      prefix = prefix.substring(1);
    }
    Path p = directory.resolve(prefix);
    if (Files.isReadable(p)) {
      if (interceptor != null) {
        return interceptor.apply(resp)
                 .sendFile(p);
      }
      return resp.sendFile(p);
    }
    return resp.sendNotFound();
  });
}

@Override
public HttpServerRoutes directory(String uri, Path directory,
    Function<HttpServerResponse, HttpServerResponse> interceptor) {
  Objects.requireNonNull(directory, "directory");
  return route(HttpPredicate.prefix(uri), (req, resp) -> {
    String prefix = URI.create(req.uri())
              .getPath()
              .replaceFirst(uri, "");
    if(prefix.charAt(0) == '/'){
      prefix = prefix.substring(1);
    }
    Path p = directory.resolve(prefix);
    if (Files.isReadable(p)) {
      if (interceptor != null) {
        return interceptor.apply(resp)
                 .sendFile(p);
      }
      return resp.sendFile(p);
    }
    return resp.sendNotFound();
  });
}

@Override
public Publisher<Void> apply(HttpServerRequest request, HttpServerResponse response) {
  final Iterator<HttpRouteHandler> iterator = handlers.iterator();
  HttpRouteHandler cursor;
  try {
    while (iterator.hasNext()) {
      cursor = iterator.next();
      if (cursor.test(request)) {
        return cursor.apply(request, response);
      }
    }
  }
  catch (Throwable t) {
    Exceptions.throwIfFatal(t);
    return Mono.error(t); //500
  }
  return response.sendNotFound();
}

@Override
public Publisher<Void> apply(HttpServerRequest request, HttpServerResponse response) {
  final Iterator<HttpRouteHandler> iterator = handlers.iterator();
  HttpRouteHandler cursor;
  try {
    while (iterator.hasNext()) {
      cursor = iterator.next();
      if (cursor.test(request)) {
        return cursor.apply(request, response);
      }
    }
  }
  catch (Throwable t) {
    Exceptions.throwIfFatal(t);
    return Mono.error(t); //500
  }
  return response.sendNotFound();
}

/**
 * Listen for WebSocket with the given route predicate to invoke the matching handlers
 *
 * @param condition a predicate given each inbound request
 * @param handler an handler to invoke for the given condition
 * @param protocols sub-protocol to use in WS handshake signature
 *
 * @return a new handler
 */
@SuppressWarnings("unchecked")
default HttpServerRoutes ws(Predicate<? super HttpServerRequest> condition,
    BiFunction<? super WebsocketInbound, ? super WebsocketOutbound, ? extends Publisher<Void>> handler,
    @Nullable String protocols,
    int maxFramePayloadLength) {
  return route(condition, (req, resp) -> {
    if (req.requestHeaders()
        .contains(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE, true)) {
      HttpServerOperations ops = (HttpServerOperations) req;
      return ops.withWebsocketSupport(req.uri(), protocols, maxFramePayloadLength, handler);
    }
    return resp.sendNotFound();
  });
}

/**
 * Listen for WebSocket with the given route predicate to invoke the matching handlers
 *
 * @param condition a predicate given each inbound request
 * @param handler an handler to invoke for the given condition
 * @param protocols sub-protocol to use in WS handshake signature
 *
 * @return a new handler
 */
@SuppressWarnings("unchecked")
default HttpServerRoutes ws(Predicate<? super HttpServerRequest> condition,
    BiFunction<? super WebsocketInbound, ? super WebsocketOutbound, ? extends Publisher<Void>> handler,
    @Nullable String protocols,
    int maxFramePayloadLength) {
  return route(condition, (req, resp) -> {
    if (req.requestHeaders()
        .contains(HttpHeaderNames.CONNECTION, HttpHeaderValues.UPGRADE, true)) {
      HttpServerOperations ops = (HttpServerOperations) req;
      return ops.withWebsocketSupport(req.uri(), protocols, maxFramePayloadLength, handler);
    }
    return resp.sendNotFound();
  });
}

@Test
public void httpPort() {
  DisposableServer blockingFacade = HttpServer.create()
                        .port(8080)
                        .handle((req, resp) -> resp.sendNotFound())
                        .wiretap(true)
                        .bindNow();
  blockingFacade.disposeNow();
  assertThat(blockingFacade.address().getPort())
      .isEqualTo(8080);
}

@Test
public void httpPortWithAddress() {
  DisposableServer blockingFacade = HttpServer.create()
                        .port(8080)
                        .host("localhost")
                        .handle((req, resp) -> resp.sendNotFound())
                        .wiretap(true)
                        .bindNow();
  blockingFacade.disposeNow();
  assertThat(blockingFacade.address().getPort())
      .isEqualTo(8080);
}

               .validateHeaders(false)
               .initialBufferSize(10))
.handle((req, resp) -> req.receive().then(resp.sendNotFound()))
.tcpConfiguration(tcp ->
    tcp.doOnConnection(c -> {