net.ymate.platform.mvc.web.DispatcherFilter.java Source code

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Here is the source code for net.ymate.platform.mvc.web.DispatcherFilter.java

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/*
 * Copyright 2007-2107 the original author or authors.
 *
 * 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 net.ymate.platform.mvc.web;

import java.io.IOException;
import java.util.regex.Pattern;

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 net.ymate.platform.mvc.web.context.IWebRequestContext;
import net.ymate.platform.mvc.web.support.DispatchHelper;

import org.apache.commons.lang.StringUtils;

/**
 * <p>
 * DispatcherFilter
 * </p>
 * <p>
 * WebMVC?
 * </p>
 * 
 * @author (suninformation@163.com)
 * @version 0.0.0
 *          <table style="border:1px solid gray;">
 *          <tr>
 *          <th width="100px">?</th><th width="100px"></th><th
 *          width="100px"></th><th width="100px"></th>
 *          </tr>
 *          <!--  Table ?? -->
 *          <tr>
 *          <td>0.0.0</td>
 *          <td></td>
 *          <td></td>
 *          <td>2012-12-23?11:19:39</td>
 *          </tr>
 *          </table>
 */
public class DispatcherFilter implements Filter {

    private static final String IGNORE = "^.+\\.(jsp|png|gif|jpg|js|css|jspx|jpeg|swf|ico)$";

    private Pattern ignorePatern;

    private FilterConfig __filterConfig;

    private DispatchHelper __dispHelper;

    /* (non-Javadoc)
     * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
     */
    public void init(FilterConfig filterConfig) throws ServletException {
        __filterConfig = filterConfig;
        String _regx = StringUtils.defaultIfEmpty(__filterConfig.getInitParameter("ignore"), IGNORE);
        if (!"false".equalsIgnoreCase(_regx)) {
            ignorePatern = Pattern.compile(_regx, Pattern.CASE_INSENSITIVE);
        }
        __dispHelper = new DispatchHelper(filterConfig);
    }

    /* (non-Javadoc)
     * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
     */
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        // ?
        request.setCharacterEncoding(WebMVC.getConfig().getCharsetEncoding());
        response.setCharacterEncoding(WebMVC.getConfig().getCharsetEncoding());
        response.setContentType("text/html;charset=" + WebMVC.getConfig().getCharsetEncoding());
        //
        IWebRequestContext _context = __dispHelper.bindRequestContext((HttpServletRequest) request);
        if (null == ignorePatern || !ignorePatern.matcher(_context.getUrl()).find()) {
            __dispHelper.doRequestProcess(_context, __filterConfig.getServletContext(),
                    (HttpServletRequest) request, (HttpServletResponse) response);
        } else {
            chain.doFilter(request, response);
        }
    }

    /* (non-Javadoc)
     * @see javax.servlet.Filter#destroy()
     */
    public void destroy() {
    }

}