gistfile1.java

import spark.*;

public class Issue107 {

    public static void main(String[] args) {
        Spark.before(new Filter("/issue") {
            @Override
            public void handle(Request request, Response response) {
                System.out.println("Filter sees sees body: '" + request.body() + "'");
            }
        });
        Spark.post(new Route("/issue") {
            @Override
            public Object handle(Request request, Response response) {
                System.out.println("Route sees body: '" + request.body() + "'");
                return "";
            }
        });
    }
}

Run the above and then poke it with curl:

curl -i -X post --data 'test' http://localhost:4567/issue