ActionServlet.java

package com.xenoage.zong.webserver.servlet;

import static com.xenoage.utils.PlatformUtils.platformUtils;
import static com.xenoage.zong.webserver.util.Response.writeError;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.xenoage.zong.webserver.Webserver;
import com.xenoage.zong.webserver.actions.Action;
import com.xenoage.zong.webserver.model.requests.Request;

/**
 * Servlet that responses to all {@link Request}s by executing
 * the corresponding {@link Action}s.
 * 
 * @author Andreas Wenger
 */
public class ActionServlet
	extends HttpServlet {

	@Override protected void doGet(HttpServletRequest httpRequest, HttpServletResponse httpResponse)
		throws ServletException {
		doPost(httpRequest, httpResponse);
	}

	@Override protected void doPost(HttpServletRequest httpRequest, HttpServletResponse httpResponse)
		throws ServletException {
		try {
			Request request;
			String data = httpRequest.getParameter("data");
			if (data != null) {
				request = Request.read(data);
				request.respond(Webserver.instance, httpResponse);
			}
			else {
				writeError(httpResponse, "Parameter data missing");
			}
		} catch (RuntimeException ex) {
			writeError(httpResponse, platformUtils().getStackTraceString(ex));
			return;
		} catch (Exception ex) {
			writeError(httpResponse, "Internal Server Error: " + ex.getMessage() + "\n\n" +
				"Stack trace:\n" + platformUtils().getStackTraceString(ex));
			return;
		}
	}

}