1
22
23 package com.liferay.portal.servlet.filters.minifier;
24
25 import com.liferay.portal.kernel.configuration.Filter;
26 import com.liferay.portal.kernel.log.Log;
27 import com.liferay.portal.kernel.log.LogFactoryUtil;
28 import com.liferay.portal.kernel.servlet.BrowserSniffer;
29 import com.liferay.portal.kernel.servlet.ServletContextUtil;
30 import com.liferay.portal.kernel.util.ArrayUtil;
31 import com.liferay.portal.kernel.util.ContentTypes;
32 import com.liferay.portal.kernel.util.FileUtil;
33 import com.liferay.portal.kernel.util.GetterUtil;
34 import com.liferay.portal.kernel.util.ParamUtil;
35 import com.liferay.portal.kernel.util.StringPool;
36 import com.liferay.portal.kernel.util.StringUtil;
37 import com.liferay.portal.kernel.util.Validator;
38 import com.liferay.portal.servlet.filters.BasePortalFilter;
39 import com.liferay.portal.util.MinifierUtil;
40 import com.liferay.portal.util.PropsKeys;
41 import com.liferay.portal.util.PropsUtil;
42 import com.liferay.portal.util.PropsValues;
43 import com.liferay.util.SystemProperties;
44 import com.liferay.util.servlet.ServletResponseUtil;
45 import com.liferay.util.servlet.filters.CacheResponse;
46 import com.liferay.util.servlet.filters.CacheResponseUtil;
47
48 import java.io.File;
49 import java.io.IOException;
50
51 import java.util.regex.Matcher;
52 import java.util.regex.Pattern;
53
54 import javax.servlet.FilterChain;
55 import javax.servlet.FilterConfig;
56 import javax.servlet.ServletContext;
57 import javax.servlet.ServletException;
58 import javax.servlet.http.HttpServletRequest;
59 import javax.servlet.http.HttpServletResponse;
60
61
67 public class MinifierFilter extends BasePortalFilter {
68
69 public void init(FilterConfig filterConfig) throws ServletException {
70 super.init(filterConfig);
71
72 _servletContext = filterConfig.getServletContext();
73 _servletContextName = GetterUtil.getString(
74 _servletContext.getServletContextName());
75
76 if (Validator.isNull(_servletContextName)) {
77 _tempDir += "/portal";
78 }
79 }
80
81 protected String aggregateCss(String dir, String content)
82 throws IOException {
83
84 StringBuilder sb = new StringBuilder(content.length());
85
86 int pos = 0;
87
88 while (true) {
89 int x = content.indexOf(_CSS_IMPORT_BEGIN, pos);
90 int y = content.indexOf(
91 _CSS_IMPORT_END, x + _CSS_IMPORT_BEGIN.length());
92
93 if ((x == -1) || (y == -1)) {
94 sb.append(content.substring(pos, content.length()));
95
96 break;
97 }
98 else {
99 sb.append(content.substring(pos, x));
100
101 String importFile = content.substring(
102 x + _CSS_IMPORT_BEGIN.length(), y);
103
104 String importContent = FileUtil.read(
105 dir + StringPool.SLASH + importFile);
106
107 String importFilePath = StringPool.BLANK;
108
109 if (importFile.lastIndexOf(StringPool.SLASH) != -1) {
110 importFilePath = StringPool.SLASH + importFile.substring(
111 0, importFile.lastIndexOf(StringPool.SLASH) + 1);
112 }
113
114 importContent = aggregateCss(
115 dir + importFilePath, importContent);
116
117 int importDepth = StringUtil.count(
118 importFile, StringPool.SLASH);
119
120
122 String relativePath = StringPool.BLANK;
123
124 for (int i = 0; i < importDepth; i++) {
125 relativePath += "../";
126 }
127
128 importContent = StringUtil.replace(
129 importContent,
130 new String[] {
131 "url('" + relativePath,
132 "url(\"" + relativePath,
133 "url(" + relativePath
134 },
135 new String[] {
136 "url('[$TEMP_RELATIVE_PATH$]",
137 "url(\"[$TEMP_RELATIVE_PATH$]",
138 "url([$TEMP_RELATIVE_PATH$]"
139 });
140
141 importContent = StringUtil.replace(
142 importContent, "[$TEMP_RELATIVE_PATH$]", StringPool.BLANK);
143
144 sb.append(importContent);
145
146 pos = y + _CSS_IMPORT_END.length();
147 }
148 }
149
150 return sb.toString();
151 }
152
153 protected String getMinifiedBundleContent(
154 HttpServletRequest request, HttpServletResponse response)
155 throws IOException {
156
157 String minifierType = ParamUtil.getString(request, "minifierType");
158 String minifierBundleId = ParamUtil.getString(
159 request, "minifierBundleId");
160
161 if (Validator.isNull(minifierType) ||
162 Validator.isNull(minifierBundleId) ||
163 !ArrayUtil.contains(
164 PropsValues.JAVASCRIPT_BUNDLE_IDS, minifierBundleId)) {
165
166 return null;
167 }
168
169 String minifierBundleDir = PropsUtil.get(
170 PropsKeys.JAVASCRIPT_BUNDLE_DIR, new Filter(minifierBundleId));
171
172 String bundleDirRealPath = ServletContextUtil.getRealPath(
173 _servletContext, minifierBundleDir);
174
175 if (bundleDirRealPath == null) {
176 return null;
177 }
178
179 String cacheFileName = _tempDir + request.getRequestURI();
180
181 String queryString = request.getQueryString();
182
183 if (queryString != null) {
184 cacheFileName += _QUESTION_SEPARATOR + queryString;
185 }
186
187 String[] fileNames = PropsUtil.getArray(minifierBundleId);
188
189 File cacheFile = new File(cacheFileName);
190
191 if (cacheFile.exists()) {
192 boolean staleCache = false;
193
194 for (String fileName : fileNames) {
195 File file = new File(
196 bundleDirRealPath + StringPool.SLASH + fileName);
197
198 if (file.lastModified() > cacheFile.lastModified()) {
199 staleCache = true;
200
201 break;
202 }
203 }
204
205 if (!staleCache) {
206 response.setContentType(ContentTypes.TEXT_JAVASCRIPT);
207
208 return FileUtil.read(cacheFile);
209 }
210 }
211
212 if (_log.isInfoEnabled()) {
213 _log.info("Minifying JavaScript bundle " + minifierBundleId);
214 }
215
216 StringBuilder sb = new StringBuilder();
217
218 for (String fileName : fileNames) {
219 String content = FileUtil.read(
220 bundleDirRealPath + StringPool.SLASH + fileName);
221
222 sb.append(content);
223 sb.append(StringPool.NEW_LINE);
224 }
225
226 String minifiedContent = minifyJavaScript(sb.toString());
227
228 response.setContentType(ContentTypes.TEXT_JAVASCRIPT);
229
230 FileUtil.write(cacheFile, minifiedContent);
231
232 return minifiedContent;
233 }
234
235 protected String getMinifiedContent(
236 HttpServletRequest request, HttpServletResponse response,
237 FilterChain filterChain)
238 throws IOException, ServletException {
239
240 String minifierType = ParamUtil.getString(request, "minifierType");
241 String minifierBundleId = ParamUtil.getString(
242 request, "minifierBundleId");
243 String minifierBundleDir = ParamUtil.getString(
244 request, "minifierBundleDir");
245
246 if (Validator.isNull(minifierType) ||
247 Validator.isNotNull(minifierBundleId) ||
248 Validator.isNotNull(minifierBundleDir)) {
249
250 return null;
251 }
252
253 String requestURI = request.getRequestURI();
254
255 String realPath = ServletContextUtil.getRealPath(
256 _servletContext, requestURI);
257
258 if (realPath == null) {
259 return null;
260 }
261
262 realPath = StringUtil.replace(
263 realPath, StringPool.BACK_SLASH, StringPool.SLASH);
264
265 File file = new File(realPath);
266
267 if (!file.exists()) {
268
269
274 if (Validator.isNotNull(_servletContextName)) {
275 realPath = StringUtil.replaceFirst(
276 realPath, StringPool.SLASH + _servletContextName,
277 StringPool.BLANK);
278
279 file = new File(realPath);
280 }
281 }
282
283 if (!file.exists()) {
284 return null;
285 }
286
287 String minifiedContent = null;
288
289 String cacheCommonFileName = _tempDir + requestURI;
290
291 String queryString = request.getQueryString();
292
293 if (queryString != null) {
294 cacheCommonFileName += _QUESTION_SEPARATOR + queryString;
295 }
296
297 File cacheContentTypeFile = new File(
298 cacheCommonFileName + "_E_CONTENT_TYPE");
299 File cacheDataFile = new File(cacheCommonFileName + "_E_DATA");
300
301 if ((cacheDataFile.exists()) &&
302 (cacheDataFile.lastModified() >= file.lastModified())) {
303
304 minifiedContent = FileUtil.read(cacheDataFile);
305
306 if (cacheContentTypeFile.exists()) {
307 String contentType = FileUtil.read(cacheContentTypeFile);
308
309 response.setContentType(contentType);
310 }
311 }
312 else {
313 if (realPath.endsWith(_CSS_EXTENSION)) {
314 if (_log.isInfoEnabled()) {
315 _log.info("Minifying CSS " + file);
316 }
317
318 minifiedContent = minifyCss(request, file);
319
320 response.setContentType(ContentTypes.TEXT_CSS);
321
322 FileUtil.write(cacheContentTypeFile, ContentTypes.TEXT_CSS);
323 }
324 else if (realPath.endsWith(_JAVASCRIPT_EXTENSION)) {
325 if (_log.isInfoEnabled()) {
326 _log.info("Minifying JavaScript " + file);
327 }
328
329 minifiedContent = minifyJavaScript(file);
330
331 response.setContentType(ContentTypes.TEXT_JAVASCRIPT);
332
333 FileUtil.write(
334 cacheContentTypeFile, ContentTypes.TEXT_JAVASCRIPT);
335 }
336 else if (realPath.endsWith(_JSP_EXTENSION)) {
337 if (_log.isInfoEnabled()) {
338 _log.info("Minifying JSP " + file);
339 }
340
341 CacheResponse cacheResponse = new CacheResponse(
342 response, StringPool.UTF8);
343
344 processFilter(
345 MinifierFilter.class, request, cacheResponse, filterChain);
346
347 CacheResponseUtil.addHeaders(
348 response, cacheResponse.getHeaders());
349
350 response.setContentType(cacheResponse.getContentType());
351
352 minifiedContent = new String(
353 cacheResponse.getData(), StringPool.UTF8);
354
355 if (minifierType.equals("css")) {
356 minifiedContent = minifyCss(request, minifiedContent);
357 }
358 else if (minifierType.equals("js")) {
359 minifiedContent = minifyJavaScript(minifiedContent);
360 }
361
362 FileUtil.write(
363 cacheContentTypeFile, cacheResponse.getContentType());
364 }
365 else {
366 return null;
367 }
368
369 FileUtil.write(cacheDataFile, minifiedContent);
370 }
371
372 return minifiedContent;
373 }
374
375 protected String minifyCss(HttpServletRequest request, File file)
376 throws IOException {
377
378 String content = FileUtil.read(file);
379
380 content = aggregateCss(file.getParent(), content);
381
382 return minifyCss(request, content);
383 }
384
385 protected String minifyCss(HttpServletRequest request, String content) {
386 String browserId = ParamUtil.getString(request, "browserId");
387
388 if (!browserId.equals(BrowserSniffer.BROWSER_ID_IE)) {
389 Matcher matcher = _pattern.matcher(content);
390
391 content = matcher.replaceAll(StringPool.BLANK);
392 }
393
394 return MinifierUtil.minifyCss(content);
395 }
396
397 protected String minifyJavaScript(File file) throws IOException {
398 String content = FileUtil.read(file);
399
400 return minifyJavaScript(content);
401 }
402
403 protected String minifyJavaScript(String content) {
404 return MinifierUtil.minifyJavaScript(content);
405 }
406
407 protected void processFilter(
408 HttpServletRequest request, HttpServletResponse response,
409 FilterChain filterChain)
410 throws IOException, ServletException {
411
412 String minifiedContent = getMinifiedContent(
413 request, response, filterChain);
414
415 if (Validator.isNull(minifiedContent)) {
416 minifiedContent = getMinifiedBundleContent(request, response);
417 }
418
419 if (Validator.isNull(minifiedContent)) {
420 processFilter(MinifierFilter.class, request, response, filterChain);
421 }
422 else {
423 ServletResponseUtil.write(response, minifiedContent);
424 }
425 }
426
427 private static final String _CSS_IMPORT_BEGIN = "@import url(";
428
429 private static final String _CSS_IMPORT_END = ");";
430
431 private static final String _CSS_EXTENSION = ".css";
432
433 private static final String _JAVASCRIPT_EXTENSION = ".js";
434
435 private static final String _JSP_EXTENSION = ".jsp";
436
437 private static final String _QUESTION_SEPARATOR = "_Q_";
438
439 private static final String _TEMP_DIR =
440 SystemProperties.get(SystemProperties.TMP_DIR) + "/liferay/minifier";
441
442 private static Log _log = LogFactoryUtil.getLog(MinifierFilter.class);
443
444 private static Pattern _pattern = Pattern.compile(
445 "^(\\.ie|\\.js\\.ie)([^}]*)}", Pattern.MULTILINE);
446
447 private ServletContext _servletContext;
448 private String _servletContextName;
449 private String _tempDir = _TEMP_DIR;
450
451 }