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.PropsKeys;
36 import com.liferay.portal.kernel.util.StringPool;
37 import com.liferay.portal.kernel.util.StringUtil;
38 import com.liferay.portal.kernel.util.Validator;
39 import com.liferay.portal.servlet.filters.BasePortalFilter;
40 import com.liferay.portal.servlet.filters.etag.ETagUtil;
41 import com.liferay.portal.util.MinifierUtil;
42 import com.liferay.portal.util.PropsUtil;
43 import com.liferay.portal.util.PropsValues;
44 import com.liferay.util.SystemProperties;
45 import com.liferay.util.servlet.ServletResponseUtil;
46 import com.liferay.util.servlet.filters.CacheResponse;
47 import com.liferay.util.servlet.filters.CacheResponseUtil;
48
49 import java.io.File;
50 import java.io.IOException;
51
52 import java.util.regex.Matcher;
53 import java.util.regex.Pattern;
54
55 import javax.servlet.FilterChain;
56 import javax.servlet.FilterConfig;
57 import javax.servlet.ServletContext;
58 import javax.servlet.http.HttpServletRequest;
59 import javax.servlet.http.HttpServletResponse;
60
61
66 public class MinifierFilter extends BasePortalFilter {
67
68 public void init(FilterConfig filterConfig) {
69 super.init(filterConfig);
70
71 _servletContext = filterConfig.getServletContext();
72 _servletContextName = GetterUtil.getString(
73 _servletContext.getServletContextName());
74
75 if (Validator.isNull(_servletContextName)) {
76 _tempDir += "/portal";
77 }
78 }
79
80 protected String aggregateCss(String dir, String content)
81 throws IOException {
82
83 StringBuilder sb = new StringBuilder(content.length());
84
85 int pos = 0;
86
87 while (true) {
88 int x = content.indexOf(_CSS_IMPORT_BEGIN, pos);
89 int y = content.indexOf(
90 _CSS_IMPORT_END, x + _CSS_IMPORT_BEGIN.length());
91
92 if ((x == -1) || (y == -1)) {
93 sb.append(content.substring(pos, content.length()));
94
95 break;
96 }
97 else {
98 sb.append(content.substring(pos, x));
99
100 String importFile = content.substring(
101 x + _CSS_IMPORT_BEGIN.length(), y);
102
103 String importContent = FileUtil.read(
104 dir + StringPool.SLASH + importFile);
105
106 String importFilePath = StringPool.BLANK;
107
108 if (importFile.lastIndexOf(StringPool.SLASH) != -1) {
109 importFilePath = StringPool.SLASH + importFile.substring(
110 0, importFile.lastIndexOf(StringPool.SLASH) + 1);
111 }
112
113 importContent = aggregateCss(
114 dir + importFilePath, importContent);
115
116 int importDepth = StringUtil.count(
117 importFile, StringPool.SLASH);
118
119
121 String relativePath = StringPool.BLANK;
122
123 for (int i = 0; i < importDepth; i++) {
124 relativePath += "../";
125 }
126
127 importContent = StringUtil.replace(
128 importContent,
129 new String[] {
130 "url('" + relativePath,
131 "url(\"" + relativePath,
132 "url(" + relativePath
133 },
134 new String[] {
135 "url('[$TEMP_RELATIVE_PATH$]",
136 "url(\"[$TEMP_RELATIVE_PATH$]",
137 "url([$TEMP_RELATIVE_PATH$]"
138 });
139
140 importContent = StringUtil.replace(
141 importContent, "[$TEMP_RELATIVE_PATH$]", StringPool.BLANK);
142
143 sb.append(importContent);
144
145 pos = y + _CSS_IMPORT_END.length();
146 }
147 }
148
149 return sb.toString();
150 }
151
152 protected String getMinifiedBundleContent(
153 HttpServletRequest request, HttpServletResponse response)
154 throws IOException {
155
156 String minifierType = ParamUtil.getString(request, "minifierType");
157 String minifierBundleId = ParamUtil.getString(
158 request, "minifierBundleId");
159
160 if (Validator.isNull(minifierType) ||
161 Validator.isNull(minifierBundleId) ||
162 !ArrayUtil.contains(
163 PropsValues.JAVASCRIPT_BUNDLE_IDS, minifierBundleId)) {
164
165 return null;
166 }
167
168 String minifierBundleDir = PropsUtil.get(
169 PropsKeys.JAVASCRIPT_BUNDLE_DIR, new Filter(minifierBundleId));
170
171 String bundleDirRealPath = ServletContextUtil.getRealPath(
172 _servletContext, minifierBundleDir);
173
174 if (bundleDirRealPath == null) {
175 return null;
176 }
177
178 String cacheFileName = _tempDir + request.getRequestURI();
179
180 String queryString = request.getQueryString();
181
182 if (queryString != null) {
183 cacheFileName += _QUESTION_SEPARATOR + queryString;
184 }
185
186 String[] fileNames = PropsUtil.getArray(minifierBundleId);
187
188 File cacheFile = new File(cacheFileName);
189
190 if (cacheFile.exists()) {
191 boolean staleCache = false;
192
193 for (String fileName : fileNames) {
194 File file = new File(
195 bundleDirRealPath + StringPool.SLASH + fileName);
196
197 if (file.lastModified() > cacheFile.lastModified()) {
198 staleCache = true;
199
200 break;
201 }
202 }
203
204 if (!staleCache) {
205 response.setContentType(ContentTypes.TEXT_JAVASCRIPT);
206
207 return FileUtil.read(cacheFile);
208 }
209 }
210
211 if (_log.isInfoEnabled()) {
212 _log.info("Minifying JavaScript bundle " + minifierBundleId);
213 }
214
215 StringBuilder sb = new StringBuilder();
216
217 for (String fileName : fileNames) {
218 String content = FileUtil.read(
219 bundleDirRealPath + StringPool.SLASH + fileName);
220
221 sb.append(content);
222 sb.append(StringPool.NEW_LINE);
223 }
224
225 String minifiedContent = minifyJavaScript(sb.toString());
226
227 response.setContentType(ContentTypes.TEXT_JAVASCRIPT);
228
229 FileUtil.write(cacheFile, minifiedContent);
230
231 return minifiedContent;
232 }
233
234 protected String getMinifiedContent(
235 HttpServletRequest request, HttpServletResponse response,
236 FilterChain filterChain)
237 throws Exception {
238
239 String minifierType = ParamUtil.getString(request, "minifierType");
240 String minifierBundleId = ParamUtil.getString(
241 request, "minifierBundleId");
242 String minifierBundleDir = ParamUtil.getString(
243 request, "minifierBundleDir");
244
245 if (Validator.isNull(minifierType) ||
246 Validator.isNotNull(minifierBundleId) ||
247 Validator.isNotNull(minifierBundleDir)) {
248
249 return null;
250 }
251
252 String requestURI = request.getRequestURI();
253
254 String requestPath = requestURI;
255
256 String contextPath = request.getContextPath();
257
258 if (!contextPath.equals(StringPool.SLASH)) {
259 requestPath = requestPath.substring(contextPath.length());
260 }
261
262 String realPath = ServletContextUtil.getRealPath(
263 _servletContext, requestPath);
264
265 if (realPath == null) {
266 return null;
267 }
268
269 realPath = StringUtil.replace(
270 realPath, StringPool.BACK_SLASH, StringPool.SLASH);
271
272 File file = new File(realPath);
273
274 if (!file.exists()) {
275 return null;
276 }
277
278 String minifiedContent = null;
279
280 String cacheCommonFileName = _tempDir + requestURI;
281
282 String queryString = request.getQueryString();
283
284 if (queryString != null) {
285 cacheCommonFileName += _QUESTION_SEPARATOR + queryString;
286 }
287
288 File cacheContentTypeFile = new File(
289 cacheCommonFileName + "_E_CONTENT_TYPE");
290 File cacheDataFile = new File(cacheCommonFileName + "_E_DATA");
291
292 if ((cacheDataFile.exists()) &&
293 (cacheDataFile.lastModified() >= file.lastModified())) {
294
295 minifiedContent = FileUtil.read(cacheDataFile);
296
297 if (cacheContentTypeFile.exists()) {
298 String contentType = FileUtil.read(cacheContentTypeFile);
299
300 response.setContentType(contentType);
301 }
302 }
303 else {
304 if (realPath.endsWith(_CSS_EXTENSION)) {
305 if (_log.isInfoEnabled()) {
306 _log.info("Minifying CSS " + file);
307 }
308
309 minifiedContent = minifyCss(request, file);
310
311 response.setContentType(ContentTypes.TEXT_CSS);
312
313 FileUtil.write(cacheContentTypeFile, ContentTypes.TEXT_CSS);
314 }
315 else if (realPath.endsWith(_JAVASCRIPT_EXTENSION)) {
316 if (_log.isInfoEnabled()) {
317 _log.info("Minifying JavaScript " + file);
318 }
319
320 minifiedContent = minifyJavaScript(file);
321
322 response.setContentType(ContentTypes.TEXT_JAVASCRIPT);
323
324 FileUtil.write(
325 cacheContentTypeFile, ContentTypes.TEXT_JAVASCRIPT);
326 }
327 else if (realPath.endsWith(_JSP_EXTENSION)) {
328 if (_log.isInfoEnabled()) {
329 _log.info("Minifying JSP " + file);
330 }
331
332 CacheResponse cacheResponse = new CacheResponse(
333 response, StringPool.UTF8);
334
335 processFilter(
336 MinifierFilter.class, request, cacheResponse, filterChain);
337
338 CacheResponseUtil.addHeaders(
339 response, cacheResponse.getHeaders());
340
341 response.setContentType(cacheResponse.getContentType());
342
343 minifiedContent = new String(
344 cacheResponse.getData(), StringPool.UTF8);
345
346 if (minifierType.equals("css")) {
347 minifiedContent = minifyCss(request, minifiedContent);
348 }
349 else if (minifierType.equals("js")) {
350 minifiedContent = minifyJavaScript(minifiedContent);
351 }
352
353 FileUtil.write(
354 cacheContentTypeFile, cacheResponse.getContentType());
355 }
356 else {
357 return null;
358 }
359
360 FileUtil.write(cacheDataFile, minifiedContent);
361 }
362
363 return minifiedContent;
364 }
365
366 protected String minifyCss(HttpServletRequest request, File file)
367 throws IOException {
368
369 String content = FileUtil.read(file);
370
371 content = aggregateCss(file.getParent(), content);
372
373 return minifyCss(request, content);
374 }
375
376 protected String minifyCss(HttpServletRequest request, String content) {
377 String browserId = ParamUtil.getString(request, "browserId");
378
379 if (!browserId.equals(BrowserSniffer.BROWSER_ID_IE)) {
380 Matcher matcher = _pattern.matcher(content);
381
382 content = matcher.replaceAll(StringPool.BLANK);
383 }
384
385 return MinifierUtil.minifyCss(content);
386 }
387
388 protected String minifyJavaScript(File file) throws IOException {
389 String content = FileUtil.read(file);
390
391 return minifyJavaScript(content);
392 }
393
394 protected String minifyJavaScript(String content) {
395 return MinifierUtil.minifyJavaScript(content);
396 }
397
398 protected void processFilter(
399 HttpServletRequest request, HttpServletResponse response,
400 FilterChain filterChain)
401 throws Exception {
402
403 String minifiedContent = getMinifiedContent(
404 request, response, filterChain);
405
406 if (Validator.isNull(minifiedContent)) {
407 minifiedContent = getMinifiedBundleContent(request, response);
408 }
409
410 if (Validator.isNull(minifiedContent)) {
411 processFilter(MinifierFilter.class, request, response, filterChain);
412 }
413 else {
414 if (!ETagUtil.processETag(request, response, minifiedContent)) {
415 ServletResponseUtil.write(response, minifiedContent);
416 }
417 }
418 }
419
420 private static final String _CSS_IMPORT_BEGIN = "@import url(";
421
422 private static final String _CSS_IMPORT_END = ");";
423
424 private static final String _CSS_EXTENSION = ".css";
425
426 private static final String _JAVASCRIPT_EXTENSION = ".js";
427
428 private static final String _JSP_EXTENSION = ".jsp";
429
430 private static final String _QUESTION_SEPARATOR = "_Q_";
431
432 private static final String _TEMP_DIR =
433 SystemProperties.get(SystemProperties.TMP_DIR) + "/liferay/minifier";
434
435 private static Log _log = LogFactoryUtil.getLog(MinifierFilter.class);
436
437 private static Pattern _pattern = Pattern.compile(
438 "^(\\.ie|\\.js\\.ie)([^}]*)}", Pattern.MULTILINE);
439
440 private ServletContext _servletContext;
441 private String _servletContextName;
442 private String _tempDir = _TEMP_DIR;
443
444 }