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1
24 package org.riotfamily.website.css;
25
26 import java.io.File  ;
27 import java.io.IOException ;
28 import java.io.StringWriter ;
29 import java.util.HashMap ;
30 import java.util.Map ;
31 import java.util.regex.Matcher ;
32 import java.util.regex.Pattern ;
33
34 import javax.servlet.ServletContext ;
35 import javax.servlet.http.HttpServletRequest ;
36 import javax.servlet.http.HttpServletResponse ;
37
38 import org.riotfamily.cachius.spring.AbstractCacheableController;
39 import org.riotfamily.common.web.filter.ResourceStamper;
40 import org.springframework.beans.factory.InitializingBean;
41 import org.springframework.core.io.Resource;
42 import org.springframework.web.context.ServletContextAware;
43 import org.springframework.web.servlet.ModelAndView;
44 import org.springframework.web.servlet.mvc.LastModified;
45 import org.springframework.web.util.UrlPathHelper;
46
47 import freemarker.template.Configuration;
48 import freemarker.template.Template;
49 import freemarker.template.TemplateException;
50
51
79 public class CssTemplateController extends AbstractCacheableController
80 implements LastModified, ServletContextAware, InitializingBean {
81
82 public static final String KEY_PROPERTY = "key";
83
84 public static final String CONTEXT_PATH_PROPERTY = "contextPath";
85
86 private static final String DEFAULT_INI_FILE_NAME = "css.ini";
87
88 private static final String CSS_SUFFIX = ".css";
89
90 private UrlPathHelper urlPathHelper = new UrlPathHelper();
91
92 private ServletContext servletContext;
93
94 private Pattern keyPattern = Pattern.compile("(/[^/]+?)_(.*?)(\\.css)");
95
96 private String contentType = "text/css";
97
98 private Configuration freeMarkerConfig;
99
100 private IniFile iniFile;
101
102 private Pattern urlPattern = Pattern.compile(
103 "(url\\s*\\(\\s*[\"']?)(.*?)(['\"]?\\s*\\))");
104
105 private ResourceStamper stamper;
106
107 private ColorTool colorTool = new ColorTool();
108
109 private boolean addContextPathToUrls = false;
110
111 public void setServletContext(ServletContext servletContext) {
112 this.servletContext = servletContext;
113 }
114
115 public void setFreeMarkerConfig(Configuration configuration) {
116 this.freeMarkerConfig = configuration;
117 }
118
119
126 public void setStamper(ResourceStamper stamper) {
127 this.stamper = stamper;
128 }
129
130
136 public void setAddContextPathToUrls(boolean addContextPathToUrls) {
137 this.addContextPathToUrls = addContextPathToUrls;
138 }
139
140 public void setIniFileLocation(Resource resource) throws IOException {
141 iniFile = new IniFile(resource.getFile());
142 }
143
144 public void afterPropertiesSet() throws Exception {
145 if (freeMarkerConfig == null) {
146 freeMarkerConfig = new Configuration();
147 }
148 freeMarkerConfig.setDirectoryForTemplateLoading(
149 new File (servletContext.getRealPath("/")));
150 }
151
152 public long getLastModified(HttpServletRequest request) {
153 DynamicStylesheet stylesheet = lookup(request);
154 return stylesheet.lastModified();
155 }
156
157 public ModelAndView handleRequest(HttpServletRequest request,
158 HttpServletResponse response) throws Exception {
159
160 DynamicStylesheet stylesheet = lookup(request);
161 stylesheet.serve(request, response);
162 return null;
163 }
164
165 protected DynamicStylesheet lookup(HttpServletRequest request) {
166 String path = urlPathHelper.getPathWithinApplication(request);
167 String key = null;
168 File file = new File (servletContext.getRealPath(path));
169 if (!file.exists()) {
170 Matcher matcher = keyPattern.matcher(path);
171 if (matcher.find()) {
172 key = matcher.group(2);
173 path = matcher.replaceFirst("$1$3");
174 file = new File (servletContext.getRealPath(path));
175 }
176 }
177 return new DynamicStylesheet(file, path, key);
178 }
179
180 protected class DynamicStylesheet {
181
182 private File file;
183
184 private String path;
185
186 private String key;
187
188 public DynamicStylesheet(File file, String path, String key) {
189 this.file = file;
190 this.path = path;
191 this.key = key;
192 }
193
194 public long lastModified() {
195 long lastModified = -1;
196 if (file != null) {
197 lastModified = file.lastModified();
198 }
199 if (iniFile != null) {
200 lastModified = Math.max(lastModified, iniFile.lastModified());
201 }
202 return lastModified;
203 }
204
205 public void serve(HttpServletRequest request,
206 HttpServletResponse response)
207 throws IOException , TemplateException {
208
209 if (file == null) {
210 response.sendError(HttpServletResponse.SC_NOT_FOUND);
211 return;
212 }
213 if (!file.getName().endsWith(CSS_SUFFIX)) {
214 response.sendError(HttpServletResponse.SC_FORBIDDEN);
215 }
216 if (!file.canRead()) {
217 response.sendError(HttpServletResponse.SC_NOT_FOUND,
218 "Can't read file " + file.getAbsolutePath());
219
220 return;
221 }
222
223 if (iniFile == null) {
224 File f = new File (file.getParentFile(), DEFAULT_INI_FILE_NAME);
225 if (f.canRead()) {
226 iniFile = new IniFile(f);
227 }
228 }
229
230 response.setContentType(contentType);
231
232 Map model = buildModel();
233 model.put(KEY_PROPERTY, key);
234 model.put(CONTEXT_PATH_PROPERTY, request.getContextPath());
235
236 Template template = freeMarkerConfig.getTemplate(path);
237 StringWriter sw = new StringWriter ();
238 template.process(model, sw);
239 response.getWriter().print(
240 processUrls(sw.toString(), request.getContextPath()));
241 }
242
243 private Map buildModel() {
244 HashMap model = new HashMap ();
245 model.put("color", colorTool);
246 if (iniFile != null) {
247 Map sections = iniFile.getSections();
248 model.putAll(sections);
249 model.putAll((Map ) sections.get(IniFile.GLOBAL_SECTION));
250 if (key != null) {
251 Map current = (Map ) sections.get(key);
252 if (current != null) {
253 model.putAll(current);
254 }
255 }
256 }
257 return model;
258 }
259
260 private String processUrls(String css, String contextPath) {
261 if (stamper == null && !addContextPathToUrls) {
262 return css;
263 }
264 StringBuffer sb = new StringBuffer ();
265 Matcher matcher = urlPattern.matcher(css);
266 while (matcher.find()) {
267 String url = matcher.group(2);
268 if (stamper != null) {
269 url = stamper.stamp(url);
270 }
271 if (addContextPathToUrls && url.startsWith("/")) {
272 url = contextPath + url;
273 }
274 matcher.appendReplacement(sb, "$1" + url + "$3");
275 }
276 matcher.appendTail(sb);
277 return sb.toString();
278 }
279
280 }
281 }
282 |
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