/*
* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, B3log Team
*
* 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.b3log.solo.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.b3log.latke.Keys;
import org.b3log.latke.Latkes;
import org.b3log.latke.ioc.LatkeBeanManager;
import org.b3log.latke.ioc.Lifecycle;
import org.b3log.latke.logging.Level;
import org.b3log.latke.logging.Logger;
import org.b3log.latke.servlet.DispatcherServlet;
import org.b3log.latke.servlet.HTTPRequestContext;
import org.b3log.latke.servlet.HTTPRequestMethod;
import org.b3log.latke.servlet.HttpControl;
import org.b3log.latke.servlet.renderer.HTTP500Renderer;
import org.b3log.solo.service.InitService;
/**
* Checks initialization filter.
*
* @author <a href="http://88250.b3log.org">Liang Ding</a>
* @version 1.0.1.1, Sep 10, 2013
* @since 0.3.1
*/
public final class InitCheckFilter implements Filter {
/**
* Logger.
*/
private static final Logger LOGGER = Logger.getLogger(InitCheckFilter.class.getName());
@Override
public void init(final FilterConfig filterConfig) throws ServletException {}
/**
* If Solo has not been initialized, so redirects to /init.
*
* @param request the specified request
* @param response the specified response
* @param chain filter chain
* @throws IOException io exception
* @throws ServletException servlet exception
*/
@Override
public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
throws IOException, ServletException {
final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
final String requestURI = httpServletRequest.getRequestURI();
LOGGER.log(Level.TRACE, "Request[URI={0}]", requestURI);
// If requests Latke Remote APIs, skips this filter
if (requestURI.startsWith(Latkes.getContextPath() + "/latke/remote")) {
chain.doFilter(request, response);
return;
}
final LatkeBeanManager beanManager = Lifecycle.getBeanManager();
final InitService initService = beanManager.getReference(InitService.class);
if (initService.isInited()) {
chain.doFilter(request, response);
return;
}
if ("POST".equalsIgnoreCase(httpServletRequest.getMethod()) && (Latkes.getContextPath() + "/init").equals(requestURI)) {
// Do initailization
chain.doFilter(request, response);
return;
}
LOGGER.log(Level.INFO, "B3log Solo has not been initialized, so redirects to /init");
final HTTPRequestContext context = new HTTPRequestContext();
context.setRequest((HttpServletRequest) request);
context.setResponse((HttpServletResponse) response);
request.setAttribute(Keys.HttpRequest.REQUEST_URI, Latkes.getContextPath() + "/init");
request.setAttribute(Keys.HttpRequest.REQUEST_METHOD, HTTPRequestMethod.GET.name());
final HttpControl httpControl = new HttpControl(DispatcherServlet.SYS_HANDLER.iterator(), context);
try {
httpControl.nextHandler();
} catch (final Exception e) {
context.setRenderer(new HTTP500Renderer(e));
}
DispatcherServlet.result(context);
}
@Override
public void destroy() {}
}