SparkJava - Case sensitive endpoints

Question

I have a java code which serves http endpoints using SparkJava ( http://sparkjava.com/ ).

Endpoints are generated like that:

 get("/xxx/yyy", (request, response) -> {
        ...
        return SOMETHING_TO_RETURN
 });

With that approach I have a problem:
let's say I have an endpoint defined: '/api/status/car',
but users sometimes invoke '/api/status/ CAR ' instead. So the problem is with case sensitive of url defined like that.

Now I have to fix it somehow: make that case insensitive. I had take a look on filters (eg 'before'), but I can't modify request url (toLowerCase) I believe.

So the main question is: With defining endpoints using that approach, how can I modify request url to be lowercase, or to say sparkjava that urls should be mapped with case insensitive mode.

Answer 1

URLs (except the domain name part) might always be case-sensitive. It's up to the server to decide and therefore the user can never know. You can read about it more in W3.org .

One approach to solve your problem could be using request params :

get("/api/status/:carParam", (request, response) -> {
  if (request.params(":carParam").equalsIgnoreCase("car")) {
    return SOMETHING_TO_RETURN;
  }
});

If you have more routes under /api/status/ except car then you should rename :carParam to a more generic name like :param and then inside the handler body, you'd check this query param and return the right return value accordingly. For example:

get("/api/status/:param", (request, response) -> {
  if (request.params(":param").equalsIgnoreCase("car")) {
    return SOMETHING_TO_RETURN_CAR;
  } else if (request.params(":param").equalsIgnoreCase("passenger")) {
    return SOMETHING_TO_RETURN_PASSENGER;
  }
});