Spring MVC return output stream as response using lambda

StreamControllerExample.java

import org.apache.commons.io.IOUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

@Controller
public class StreamControllerExample {
    @RequestMapping("/")
    public StreamingResponseBody index() throws IOException {
        URL url = new URL("http://SOMEPLACE/case.jpg");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.connect();
        return outputStream -> IOUtils.copy(connection.getInputStream(), outputStream);
    }
}