/*
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WebBox - Dein Server.
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Copyright (C) 2017 Ulrich Hilger, http://uhilger.de
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package de.uhilger.wbx.web;
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import com.github.rjeschke.txtmark.Processor;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.logging.Logger;
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import javax.servlet.FilterChain;
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import javax.servlet.FilterConfig;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.markdown4j.Markdown4jProcessor;
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/**
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* Ein Filter zur Verwandlung von Markdown-Text in HTML
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*
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* @author ulrich
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*/
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public class MarkdownFilter implements javax.servlet.Filter {
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private static final Logger logger = Logger.getLogger(MarkdownFilter.class.getName());
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private static final String EXT_MD = ".md";
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public FilterConfig filterConfig;
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@Override
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public void doFilter(final ServletRequest request,
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final ServletResponse response,
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FilterChain chain)
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throws IOException, ServletException {
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response.setCharacterEncoding("UTF-8");
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HttpServletRequest hr = (HttpServletRequest) request;
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String servletPath = hr.getServletPath();
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if(servletPath.toLowerCase().endsWith(EXT_MD)) {
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OutputStream out = response.getOutputStream();
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//out.write(new String("<HR>PRE<HR>").getBytes());
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GenericResponseWrapper wrapper
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= new GenericResponseWrapper((HttpServletResponse) response);
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wrapper.setCharacterEncoding("UTF-8");
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//wrapper.setContentLength(100000);
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chain.doFilter(request, wrapper);
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String responseContent = new String(wrapper.getData(), "UTF-8");
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String html = new Markdown4jProcessor().process(responseContent);
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//String result = Processor.process(responseContent);
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out.write(html.getBytes());
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//out.write(new String("<HR>POST<HR>").getBytes());
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out.close();
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} else {
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chain.doFilter(request, response);
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}
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/*
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logger.info("requestURL: " + hr.getRequestURL().toString());
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logger.info("ContextPath: " + hr.getContextPath());
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logger.info("ServletPath: " + hr.getServletPath());
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logger.info("PathInfo: " + hr.getPathInfo());
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*/
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}
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@Override
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public void init(FilterConfig filterConfig) throws ServletException {
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this.filterConfig = filterConfig;
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}
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@Override
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public void destroy() {
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// ..
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}
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}
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