2 * DemosceneMusic - TemplateServlet.java - Copyright © 2012 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.demoscenemusic.core;
20 import java.io.ByteArrayInputStream;
21 import java.io.ByteArrayOutputStream;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.InputStreamReader;
25 import java.io.Reader;
26 import java.io.UnsupportedEncodingException;
27 import java.lang.reflect.InvocationTargetException;
28 import java.net.URISyntaxException;
29 import java.util.Comparator;
30 import java.util.Enumeration;
31 import java.util.HashMap;
34 import javax.servlet.ServletConfig;
35 import javax.servlet.ServletException;
36 import javax.servlet.http.HttpServlet;
37 import javax.servlet.http.HttpServletRequest;
38 import javax.servlet.http.HttpServletResponse;
40 import net.pterodactylus.demoscenemusic.data.Artist;
41 import net.pterodactylus.demoscenemusic.data.Properties;
42 import net.pterodactylus.demoscenemusic.data.Style;
43 import net.pterodactylus.demoscenemusic.data.Track;
44 import net.pterodactylus.demoscenemusic.data.TrackDerivative;
45 import net.pterodactylus.demoscenemusic.data.User;
46 import net.pterodactylus.demoscenemusic.page.ServletRequest;
47 import net.pterodactylus.demoscenemusic.template.DurationFilter;
48 import net.pterodactylus.demoscenemusic.template.PropertiesAccessor;
49 import net.pterodactylus.demoscenemusic.template.TrackDerivativeAccessor;
50 import net.pterodactylus.demoscenemusic.template.UserAccessor;
51 import net.pterodactylus.util.io.Closer;
52 import net.pterodactylus.util.io.StreamCopier;
53 import net.pterodactylus.util.template.ClassPathTemplateProvider;
54 import net.pterodactylus.util.template.CollectionSortFilter;
55 import net.pterodactylus.util.template.HtmlFilter;
56 import net.pterodactylus.util.template.MatchFilter;
57 import net.pterodactylus.util.template.ReflectionAccessor;
58 import net.pterodactylus.util.template.Template;
59 import net.pterodactylus.util.template.TemplateContextFactory;
60 import net.pterodactylus.util.template.TemplateParser;
61 import net.pterodactylus.util.web.Header;
62 import net.pterodactylus.util.web.Page;
63 import net.pterodactylus.util.web.Response;
68 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
70 public class TemplateServlet extends HttpServlet {
74 private final TemplateContextFactory templateContextFactory = new TemplateContextFactory();
76 private final Map<String, Page<ServletRequest>> pages = new HashMap<String, Page<ServletRequest>>();
86 public void init(ServletConfig config) throws ServletException {
88 core = (Core) config.getServletContext().getAttribute("core");
90 templateContextFactory.addAccessor(Object.class, new ReflectionAccessor());
91 templateContextFactory.addAccessor(User.class, new UserAccessor());
92 templateContextFactory.addAccessor(Properties.class, new PropertiesAccessor());
93 templateContextFactory.addAccessor(TrackDerivative.class, new TrackDerivativeAccessor());
95 templateContextFactory.addFilter("html", new HtmlFilter());
96 CollectionSortFilter sortFilter = new CollectionSortFilter();
97 sortFilter.addComparator(Artist.class, new Comparator<Artist>() {
100 public int compare(Artist leftArtist, Artist rightArtist) {
101 return leftArtist.getName().compareToIgnoreCase(rightArtist.getName());
105 sortFilter.addComparator(Track.class, new Comparator<Track>() {
108 public int compare(Track leftTrack, Track rightTrack) {
109 return leftTrack.getName().compareToIgnoreCase(rightTrack.getName());
113 sortFilter.addComparator(Style.class, new Comparator<Style>() {
116 public int compare(Style leftStyle, Style rightStyle) {
117 return leftStyle.getName().compareToIgnoreCase(rightStyle.getName());
121 templateContextFactory.addFilter("sort", sortFilter);
122 templateContextFactory.addFilter("matches", new MatchFilter());
123 templateContextFactory.addFilter("time", new DurationFilter());
125 templateContextFactory.addTemplateObject("core", core);
126 templateContextFactory.addTemplateObject("dataManager", core.getDataManager());
128 templateContextFactory.addProvider(new ClassPathTemplateProvider(getClass(), "/templates/"));
130 for (@SuppressWarnings("rawtypes")
131 Enumeration parameterNames = config.getInitParameterNames(); parameterNames.hasMoreElements();) {
132 String pageName = (String) parameterNames.nextElement();
133 Template template = getTemplate(pageName);
134 String pageClassName = config.getInitParameter(pageName);
136 Class<?> pageClass = Class.forName(pageClassName);
137 @SuppressWarnings("unchecked")
138 Page<ServletRequest> page = (Page<ServletRequest>) pageClass.getConstructor(Core.class, TemplateContextFactory.class, Template.class).newInstance(core, templateContextFactory, template);
139 pages.put(pageName, page);
140 } catch (ClassNotFoundException cnfe1) {
141 cnfe1.printStackTrace();
142 } catch (IllegalArgumentException iae1) {
143 iae1.printStackTrace();
144 } catch (SecurityException se1) {
145 se1.printStackTrace();
146 } catch (InstantiationException ie1) {
147 ie1.printStackTrace();
148 } catch (IllegalAccessException iae1) {
149 iae1.printStackTrace();
150 } catch (InvocationTargetException ite1) {
151 ite1.printStackTrace();
152 } catch (NoSuchMethodException nsme1) {
153 nsme1.printStackTrace();
162 protected void doGet(HttpServletRequest request, HttpServletResponse httpServletResponse) throws ServletException, IOException {
163 request.setCharacterEncoding("UTF-8");
164 String path = request.getPathInfo();
165 if (path.startsWith("/")) {
166 path = path.substring(1);
168 if ((path.length() == 0) || (path.endsWith("/"))) {
171 Page<ServletRequest> page = pages.get(path);
173 ServletRequest servletRequest;
175 servletRequest = new ServletRequest(request, this);
176 } catch (URISyntaxException use1) {
177 throw new IOException("Could not create URI from " + request.getRequestURI(), use1);
179 ByteArrayOutputStream responseOutputBuffer = new ByteArrayOutputStream();
180 Response response = new Response(responseOutputBuffer);
181 response = page.handleRequest(servletRequest, response);
182 for (Header header : response.getHeaders()) {
183 for (String value : header) {
184 httpServletResponse.addHeader(header.getName(), value);
187 httpServletResponse.setContentType(response.getContentType());
188 httpServletResponse.setStatus(response.getStatusCode());
189 StreamCopier.copy(new ByteArrayInputStream(responseOutputBuffer.toByteArray()), httpServletResponse.getOutputStream());
198 protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException {
199 doGet(httpServletRequest, httpServletResponse);
206 private Template getTemplate(String pageName) {
207 InputStream templateInputStream = getClass().getResourceAsStream("/templates/" + pageName);
208 if (templateInputStream == null) {
211 Reader templateReader = null;
213 templateReader = new InputStreamReader(templateInputStream, "UTF-8");
214 return TemplateParser.parse(templateReader);
215 } catch (UnsupportedEncodingException uee1) {
216 /* can not happen. */
217 throw new RuntimeException("Could not parse templates!", uee1);
219 Closer.close(templateReader);
220 Closer.close(templateInputStream);