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-rw-r--r--src/Wallabag/CoreBundle/Helper/ContentProxy.php168
1 files changed, 168 insertions, 0 deletions
diff --git a/src/Wallabag/CoreBundle/Helper/ContentProxy.php b/src/Wallabag/CoreBundle/Helper/ContentProxy.php
index 8019df42..ddeffa77 100644
--- a/src/Wallabag/CoreBundle/Helper/ContentProxy.php
+++ b/src/Wallabag/CoreBundle/Helper/ContentProxy.php
@@ -151,4 +151,172 @@ class ContentProxy
151 { 151 {
152 return isset($content['title']) && isset($content['html']) && isset($content['url']) && isset($content['language']) && isset($content['content_type']); 152 return isset($content['title']) && isset($content['html']) && isset($content['url']) && isset($content['language']) && isset($content['content_type']);
153 } 153 }
154
155 /**
156 * Changing pictures URL in article content.
157 */
158 public static function filterPicture($content, $url, $id)
159 {
160 $matches = array();
161 $processing_pictures = array(); // list of processing image to avoid processing the same pictures twice
162 preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
163 foreach ($matches as $i => $link) {
164 $link[1] = trim($link[1]);
165 if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1])) {
166 $absolute_path = self::_getAbsoluteLink($link[2], $url);
167 $filename = basename(parse_url($absolute_path, PHP_URL_PATH));
168 $directory = self::_createAssetsDirectory($id);
169 $fullpath = $directory.'/'.$filename;
170
171 if (in_array($absolute_path, $processing_pictures) === true) {
172 // replace picture's URL only if processing is OK : already processing -> go to next picture
173 continue;
174 }
175
176 if (self::_downloadPictures($absolute_path, $fullpath) === true) {
177 $content = str_replace($matches[$i][2], Tools::getPocheUrl().$fullpath, $content);
178 }
179
180 $processing_pictures[] = $absolute_path;
181 }
182 }
183
184 return $content;
185 }
186
187 /**
188 * Get absolute URL.
189 */
190 private static function _getAbsoluteLink($relativeLink, $url)
191 {
192 /* return if already absolute URL */
193 if (parse_url($relativeLink, PHP_URL_SCHEME) != '') {
194 return $relativeLink;
195 }
196
197 /* queries and anchors */
198 if ($relativeLink[0] == '#' || $relativeLink[0] == '?') {
199 return $url.$relativeLink;
200 }
201
202 /* parse base URL and convert to local variables:
203 $scheme, $host, $path */
204 extract(parse_url($url));
205
206 /* remove non-directory element from path */
207 $path = preg_replace('#/[^/]*$#', '', $path);
208
209 /* destroy path if relative url points to root */
210 if ($relativeLink[0] == '/') {
211 $path = '';
212 }
213
214 /* dirty absolute URL */
215 $abs = $host.$path.'/'.$relativeLink;
216
217 /* replace '//' or '/./' or '/foo/../' with '/' */
218 $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
219 for ($n = 1; $n > 0; $abs = preg_replace($re, '/', $abs, -1, $n)) {
220 }
221
222 /* absolute URL is ready! */
223 return $scheme.'://'.$abs;
224 }
225
226 /**
227 * Downloading pictures.
228 *
229 * @return bool true if the download and processing is OK, false else
230 */
231 private static function _downloadPictures($absolute_path, $fullpath)
232 {
233 $rawdata = Tools::getFile($absolute_path);
234 $fullpath = urldecode($fullpath);
235
236 if (file_exists($fullpath)) {
237 unlink($fullpath);
238 }
239
240 // check extension
241 $file_ext = strrchr($fullpath, '.');
242 $whitelist = array('.jpg', '.jpeg', '.gif', '.png');
243 if (!(in_array($file_ext, $whitelist))) {
244 Tools::logm('processed image with not allowed extension. Skipping '.$fullpath);
245
246 return false;
247 }
248
249 // check headers
250 $imageinfo = getimagesize($absolute_path);
251 if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg' && $imageinfo['mime'] != 'image/jpg' && $imageinfo['mime'] != 'image/png') {
252 Tools::logm('processed image with bad header. Skipping '.$fullpath);
253
254 return false;
255 }
256
257 // regenerate image
258 $im = imagecreatefromstring($rawdata);
259 if ($im === false) {
260 Tools::logm('error while regenerating image '.$fullpath);
261
262 return false;
263 }
264
265 switch ($imageinfo['mime']) {
266 case 'image/gif':
267 $result = imagegif($im, $fullpath);
268 break;
269 case 'image/jpeg':
270 case 'image/jpg':
271 $result = imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY);
272 break;
273 case 'image/png':
274 $result = imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9));
275 break;
276 }
277 imagedestroy($im);
278
279 return $result;
280 }
281
282 /**
283 * Create a directory for an article.
284 *
285 * @param $id ID of the article
286 *
287 * @return string
288 */
289 private static function _createAssetsDirectory($id)
290 {
291 $assets_path = ABS_PATH;
292 if (!is_dir($assets_path)) {
293 mkdir($assets_path, 0715);
294 }
295
296 $article_directory = $assets_path.$id;
297 if (!is_dir($article_directory)) {
298 mkdir($article_directory, 0715);
299 }
300
301 return $article_directory;
302 }
303
304 /**
305 * Remove the directory.
306 *
307 * @param $directory
308 *
309 * @return bool
310 */
311 public static function removeDirectory($directory)
312 {
313 if (is_dir($directory)) {
314 $files = array_diff(scandir($directory), array('.', '..'));
315 foreach ($files as $file) {
316 (is_dir("$directory/$file")) ? self::removeDirectory("$directory/$file") : unlink("$directory/$file");
317 }
318
319 return rmdir($directory);
320 }
321 }
154} 322}