/*
* Copyright (C) 2011-2013 Mojavemvc.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.mojavemvc;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.mojavemvc.core.HttpMethod;
import org.mojavemvc.core.MojaveFramework;
/**
* The FrontController uses the Mojave framework to handle
* requests. Either this servlet or the {@link RequestFilter} must
* be used in a Mojave Web MVC application, but not both.
*
* @author Luis Antunes
*/
@SuppressWarnings("serial")
public final class FrontController extends HttpServlet {
private MojaveFramework framework;
/**
* The init method gets the values of the init params from the web.xml file.
*/
@Override
public void init() throws ServletException {
framework = new MojaveFramework();
framework.init(getServletConfig());
}
/**
* Overrides the HttpServlet doGet() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.GET);
}
/**
* Overrides the HttpServlet doPost() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.POST);
}
/**
* Overrides the HttpServlet doPut() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doPut(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.PUT);
}
/**
* Overrides the HttpServlet doDelete() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doDelete(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.DELETE);
}
/**
* Overrides the HttpServlet doHead() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doHead(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.HEAD);
}
/**
* Overrides the HttpServlet doTrace() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doTrace(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.TRACE);
}
/**
* Overrides the HttpServlet doOptions() method. Executes processRequest().
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
*/
@Override
public void doOptions(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
processRequest(req, res, HttpMethod.OPTIONS);
}
/**
*
* @param req
* an HttpServletRequest instance reference
* @param res
* an HttpServletResponse instance reference
* @throws ServletException
* @throws IOException
*/
protected void processRequest(HttpServletRequest req, HttpServletResponse res, HttpMethod httpMethod)
throws ServletException, IOException {
framework.handleRequest(req, res, httpMethod, undecodedPathInfo(req));
}
private String undecodedPathInfo(HttpServletRequest req) {
final String pathSeparator = "/";
final String contextPath = req.getContextPath();
final String servletPath = req.getServletPath();
String pathInfo = req.getRequestURI();
if (contextPath.trim().length() > 0 && !contextPath.equals(pathSeparator)) {
pathInfo = pathInfo.substring(contextPath.length());
}
if (servletPath.trim().length() > 0 && !servletPath.equals(pathSeparator)) {
pathInfo = pathInfo.substring(servletPath.length());
}
if (!pathInfo.startsWith(pathSeparator)) {
pathInfo = pathSeparator + pathInfo;
}
return pathInfo;
}
}