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-rwxr-xr-xinc/3rdparty/makefulltextfeedHelpers.php386
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diff --git a/inc/3rdparty/makefulltextfeedHelpers.php b/inc/3rdparty/makefulltextfeedHelpers.php
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1<?php
2
3// Autoloading of classes allows us to include files only when they're
4// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
5function autoload($class_name) {
6 static $dir = null;
7 if ($dir === null) $dir = dirname(__FILE__).'/libraries/';
8 static $mapping = array(
9 // Include FeedCreator for RSS/Atom creation
10 'FeedWriter' => 'feedwriter/FeedWriter.php',
11 'FeedItem' => 'feedwriter/FeedItem.php',
12 // Include ContentExtractor and Readability for identifying and extracting content from URLs
13 'ContentExtractor' => 'content-extractor/ContentExtractor.php',
14 'SiteConfig' => 'content-extractor/SiteConfig.php',
15 // Include Humble HTTP Agent to allow parallel requests and response caching
16 'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
17 'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
18 'CookieJar' => 'humble-http-agent/CookieJar.php',
19 // Include Zend Cache to improve performance (cache results)
20 'Zend_Cache' => 'Zend/Cache.php',
21 // Language detect
22 'Text_LanguageDetect' => 'language-detect/LanguageDetect.php',
23 // HTML5 Lib
24 'HTML5_Parser' => 'html5/Parser.php',
25 // htmLawed - used if XSS filter is enabled (xss_filter)
26 'htmLawed' => 'htmLawed/htmLawed.php'
27 );
28 if (isset($mapping[$class_name])) {
29 debug("** Loading class $class_name ({$mapping[$class_name]})");
30 require $dir.$mapping[$class_name];
31 return true;
32 } else {
33 return false;
34 }
35}
36spl_autoload_register('autoload');
37
38class DummySingleItemFeed {
39 public $item;
40 function __construct($url) { $this->item = new DummySingleItem($url); }
41 public function get_title() { return ''; }
42 public function get_description() { return 'Content extracted from '.$this->item->url; }
43 public function get_link() { return $this->item->url; }
44 public function get_language() { return false; }
45 public function get_image_url() { return false; }
46 public function get_items($start=0, $max=1) { return array(0=>$this->item); }
47}
48class DummySingleItem {
49 public $url;
50 function __construct($url) { $this->url = $url; }
51 public function get_permalink() { return $this->url; }
52 public function get_title() { return null; }
53 public function get_date($format='') { return false; }
54 public function get_author($key=0) { return null; }
55 public function get_authors() { return null; }
56 public function get_description() { return ''; }
57 public function get_enclosure($key=0, $prefer=null) { return null; }
58 public function get_enclosures() { return null; }
59 public function get_categories() { return null; }
60}
61
62///////////////////////////////
63// HELPER FUNCTIONS
64///////////////////////////////
65
66// Adapted from WordPress
67// http://core.trac.wordpress.org/browser/tags/3.5.1/wp-includes/formatting.php#L2173
68function get_excerpt($text, $num_words=55, $more=null) {
69 if (null === $more) $more = '&hellip;';
70 $text = strip_tags($text);
71 //TODO: Check if word count is based on single characters (East Asian characters)
72 /*
73 if (1==2) {
74 $text = trim(preg_replace("/[\n\r\t ]+/", ' ', $text), ' ');
75 preg_match_all('/./u', $text, $words_array);
76 $words_array = array_slice($words_array[0], 0, $num_words + 1);
77 $sep = '';
78 } else {
79 $words_array = preg_split("/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY);
80 $sep = ' ';
81 }
82 */
83 $words_array = preg_split("/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY);
84 $sep = ' ';
85 if (count($words_array) > $num_words) {
86 array_pop($words_array);
87 $text = implode($sep, $words_array);
88 $text = $text.$more;
89 } else {
90 $text = implode($sep, $words_array);
91 }
92 // trim whitespace at beginning or end of string
93 // See: http://stackoverflow.com/questions/4166896/trim-unicode-whitespace-in-php-5-2
94 $text = preg_replace('/^[\pZ\pC]+|[\pZ\pC]+$/u', '', $text);
95 return $text;
96}
97
98function url_allowed($url) {
99 global $options;
100 if (!empty($options->allowed_urls)) {
101 $allowed = false;
102 foreach ($options->allowed_urls as $allowurl) {
103 if (stristr($url, $allowurl) !== false) {
104 $allowed = true;
105 break;
106 }
107 }
108 if (!$allowed) return false;
109 } else {
110 foreach ($options->blocked_urls as $blockurl) {
111 if (stristr($url, $blockurl) !== false) {
112 return false;
113 }
114 }
115 }
116 return true;
117}
118
119//////////////////////////////////////////////
120// Convert $html to UTF8
121// (uses HTTP headers and HTML to find encoding)
122// adapted from http://stackoverflow.com/questions/910793/php-detect-encoding-and-make-everything-utf-8
123//////////////////////////////////////////////
124function convert_to_utf8($html, $header=null)
125{
126 $encoding = null;
127 if ($html || $header) {
128 if (is_array($header)) $header = implode("\n", $header);
129 if (!$header || !preg_match_all('/^Content-Type:\s+([^;]+)(?:;\s*charset=["\']?([^;"\'\n]*))?/im', $header, $match, PREG_SET_ORDER)) {
130 // error parsing the response
131 debug('Could not find Content-Type header in HTTP response');
132 } else {
133 $match = end($match); // get last matched element (in case of redirects)
134 if (isset($match[2])) $encoding = trim($match[2], "\"' \r\n\0\x0B\t");
135 }
136 // TODO: check to see if encoding is supported (can we convert it?)
137 // If it's not, result will be empty string.
138 // For now we'll check for invalid encoding types returned by some sites, e.g. 'none'
139 // Problem URL: http://facta.co.jp/blog/archives/20111026001026.html
140 if (!$encoding || $encoding == 'none') {
141 // search for encoding in HTML - only look at the first 50000 characters
142 // Why 50000? See, for example, http://www.lemonde.fr/festival-de-cannes/article/2012/05/23/deux-cretes-en-goguette-sur-la-croisette_1705732_766360.html
143 // TODO: improve this so it looks at smaller chunks first
144 $html_head = substr($html, 0, 50000);
145 if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $html_head, $match)) {
146 $encoding = trim($match[1], '"\'');
147 } elseif (preg_match('/<meta\s+http-equiv=["\']?Content-Type["\']? content=["\'][^;]+;\s*charset=["\']?([^;"\'>]+)/i', $html_head, $match)) {
148 $encoding = trim($match[1]);
149 } elseif (preg_match_all('/<meta\s+([^>]+)>/i', $html_head, $match)) {
150 foreach ($match[1] as $_test) {
151 if (preg_match('/charset=["\']?([^"\']+)/i', $_test, $_m)) {
152 $encoding = trim($_m[1]);
153 break;
154 }
155 }
156 }
157 }
158 if (isset($encoding)) $encoding = trim($encoding);
159 // trim is important here!
160 if (!$encoding || (strtolower($encoding) == 'iso-8859-1')) {
161 // replace MS Word smart qutoes
162 $trans = array();
163 $trans[chr(130)] = '&sbquo;'; // Single Low-9 Quotation Mark
164 $trans[chr(131)] = '&fnof;'; // Latin Small Letter F With Hook
165 $trans[chr(132)] = '&bdquo;'; // Double Low-9 Quotation Mark
166 $trans[chr(133)] = '&hellip;'; // Horizontal Ellipsis
167 $trans[chr(134)] = '&dagger;'; // Dagger
168 $trans[chr(135)] = '&Dagger;'; // Double Dagger
169 $trans[chr(136)] = '&circ;'; // Modifier Letter Circumflex Accent
170 $trans[chr(137)] = '&permil;'; // Per Mille Sign
171 $trans[chr(138)] = '&Scaron;'; // Latin Capital Letter S With Caron
172 $trans[chr(139)] = '&lsaquo;'; // Single Left-Pointing Angle Quotation Mark
173 $trans[chr(140)] = '&OElig;'; // Latin Capital Ligature OE
174 $trans[chr(145)] = '&lsquo;'; // Left Single Quotation Mark
175 $trans[chr(146)] = '&rsquo;'; // Right Single Quotation Mark
176 $trans[chr(147)] = '&ldquo;'; // Left Double Quotation Mark
177 $trans[chr(148)] = '&rdquo;'; // Right Double Quotation Mark
178 $trans[chr(149)] = '&bull;'; // Bullet
179 $trans[chr(150)] = '&ndash;'; // En Dash
180 $trans[chr(151)] = '&mdash;'; // Em Dash
181 $trans[chr(152)] = '&tilde;'; // Small Tilde
182 $trans[chr(153)] = '&trade;'; // Trade Mark Sign
183 $trans[chr(154)] = '&scaron;'; // Latin Small Letter S With Caron
184 $trans[chr(155)] = '&rsaquo;'; // Single Right-Pointing Angle Quotation Mark
185 $trans[chr(156)] = '&oelig;'; // Latin Small Ligature OE
186 $trans[chr(159)] = '&Yuml;'; // Latin Capital Letter Y With Diaeresis
187 $html = strtr($html, $trans);
188 }
189 if (!$encoding) {
190 debug('No character encoding found, so treating as UTF-8');
191 $encoding = 'utf-8';
192 } else {
193 debug('Character encoding: '.$encoding);
194 if (strtolower($encoding) != 'utf-8') {
195 debug('Converting to UTF-8');
196 $html = SimplePie_Misc::change_encoding($html, $encoding, 'utf-8');
197 }
198 }
199 }
200 return $html;
201}
202
203function makeAbsolute($base, $elem) {
204 $base = new SimplePie_IRI($base);
205 // remove '//' in URL path (used to prevent URLs from resolving properly)
206 // TODO: check if this is still the case
207 if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
208 foreach(array('a'=>'href', 'img'=>'src') as $tag => $attr) {
209 $elems = $elem->getElementsByTagName($tag);
210 for ($i = $elems->length-1; $i >= 0; $i--) {
211 $e = $elems->item($i);
212 //$e->parentNode->replaceChild($articleContent->ownerDocument->createTextNode($e->textContent), $e);
213 makeAbsoluteAttr($base, $e, $attr);
214 }
215 if (strtolower($elem->tagName) == $tag) makeAbsoluteAttr($base, $elem, $attr);
216 }
217}
218function makeAbsoluteAttr($base, $e, $attr) {
219 if ($e->hasAttribute($attr)) {
220 // Trim leading and trailing white space. I don't really like this but
221 // unfortunately it does appear on some sites. e.g. <img src=" /path/to/image.jpg" />
222 $url = trim(str_replace('%20', ' ', $e->getAttribute($attr)));
223 $url = str_replace(' ', '%20', $url);
224 if (!preg_match('!https?://!i', $url)) {
225 if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
226 $e->setAttribute($attr, $absolute);
227 }
228 }
229 }
230}
231function makeAbsoluteStr($base, $url) {
232 $base = new SimplePie_IRI($base);
233 // remove '//' in URL path (causes URLs not to resolve properly)
234 if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
235 if (preg_match('!^https?://!i', $url)) {
236 // already absolute
237 return $url;
238 } else {
239 if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
240 return $absolute;
241 }
242 return false;
243 }
244}
245// returns single page response, or false if not found
246function getSinglePage($item, $html, $url) {
247 global $http, $extractor;
248 debug('Looking for site config files to see if single page link exists');
249 $site_config = $extractor->buildSiteConfig($url, $html);
250 $splink = null;
251 if (!empty($site_config->single_page_link)) {
252 $splink = $site_config->single_page_link;
253 } elseif (!empty($site_config->single_page_link_in_feed)) {
254 // single page link xpath is targeted at feed
255 $splink = $site_config->single_page_link_in_feed;
256 // so let's replace HTML with feed item description
257 $html = $item->get_description();
258 }
259 if (isset($splink)) {
260 // Build DOM tree from HTML
261 $readability = new Readability($html, $url);
262 $xpath = new DOMXPath($readability->dom);
263 // Loop through single_page_link xpath expressions
264 $single_page_url = null;
265 foreach ($splink as $pattern) {
266 $elems = @$xpath->evaluate($pattern, $readability->dom);
267 if (is_string($elems)) {
268 $single_page_url = trim($elems);
269 break;
270 } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
271 foreach ($elems as $item) {
272 if ($item instanceof DOMElement && $item->hasAttribute('href')) {
273 $single_page_url = $item->getAttribute('href');
274 break 2;
275 } elseif ($item instanceof DOMAttr && $item->value) {
276 $single_page_url = $item->value;
277 break 2;
278 }
279 }
280 }
281 }
282 // If we've got URL, resolve against $url
283 if (isset($single_page_url) && ($single_page_url = makeAbsoluteStr($url, $single_page_url))) {
284 // check it's not what we have already!
285 if ($single_page_url != $url) {
286 // it's not, so let's try to fetch it...
287 $_prev_ref = $http->referer;
288 $http->referer = $single_page_url;
289 if (($response = $http->get($single_page_url, true)) && $response['status_code'] < 300) {
290 $http->referer = $_prev_ref;
291 return $response;
292 }
293 $http->referer = $_prev_ref;
294 }
295 }
296 }
297 return false;
298}
299
300// based on content-type http header, decide what to do
301// param: HTTP headers string
302// return: array with keys: 'mime', 'type', 'subtype', 'action', 'name'
303// e.g. array('mime'=>'image/jpeg', 'type'=>'image', 'subtype'=>'jpeg', 'action'=>'link', 'name'=>'Image')
304function get_mime_action_info($headers) {
305 global $options;
306 // check if action defined for returned Content-Type
307 $info = array();
308 if (preg_match('!^Content-Type:\s*(([-\w]+)/([-\w\+]+))!im', $headers, $match)) {
309 // look for full mime type (e.g. image/jpeg) or just type (e.g. image)
310 // match[1] = full mime type, e.g. image/jpeg
311 // match[2] = first part, e.g. image
312 // match[3] = last part, e.g. jpeg
313 $info['mime'] = strtolower(trim($match[1]));
314 $info['type'] = strtolower(trim($match[2]));
315 $info['subtype'] = strtolower(trim($match[3]));
316 foreach (array($info['mime'], $info['type']) as $_mime) {
317 if (isset($options->content_type_exc[$_mime])) {
318 $info['action'] = $options->content_type_exc[$_mime]['action'];
319 $info['name'] = $options->content_type_exc[$_mime]['name'];
320 break;
321 }
322 }
323 }
324 return $info;
325}
326
327function remove_url_cruft($url) {
328 // remove google analytics for the time being
329 // regex adapted from http://navitronic.co.uk/2010/12/removing-google-analytics-cruft-from-urls/
330 // https://gist.github.com/758177
331 return preg_replace('/(\?|\&)utm_[a-z]+=[^\&]+/', '', $url);
332}
333
334function make_substitutions($string) {
335 if ($string == '') return $string;
336 global $item, $effective_url;
337 $string = str_replace('{url}', htmlspecialchars($item->get_permalink()), $string);
338 $string = str_replace('{effective-url}', htmlspecialchars($effective_url), $string);
339 return $string;
340}
341
342function get_cache() {
343 global $options, $valid_key;
344 static $cache = null;
345 if ($cache === null) {
346 $frontendOptions = array(
347 'lifetime' => 10*60, // cache lifetime of 10 minutes
348 'automatic_serialization' => false,
349 'write_control' => false,
350 'automatic_cleaning_factor' => $options->cache_cleanup,
351 'ignore_user_abort' => false
352 );
353 $backendOptions = array(
354 'cache_dir' => ($valid_key) ? $options->cache_dir.'/rss-with-key/' : $options->cache_dir.'/rss/', // directory where to put the cache files
355 'file_locking' => false,
356 'read_control' => true,
357 'read_control_type' => 'strlen',
358 'hashed_directory_level' => $options->cache_directory_level,
359 'hashed_directory_perm' => 0777,
360 'cache_file_perm' => 0664,
361 'file_name_prefix' => 'ff'
362 );
363 // getting a Zend_Cache_Core object
364 $cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
365 }
366 return $cache;
367}
368
369function debug($msg) {
370 global $debug_mode;
371 if ($debug_mode) {
372 echo '* ',$msg,"\n";
373 ob_flush();
374 flush();
375 }
376}
377
378function get_base_url($dom) {
379 $xpath = new DOMXPath($dom);
380 $base_url = @$xpath->evaluate('string(//head/base/@href)', $dom);
381 if ($base_url !== '') {
382 return $base_url;
383 } else {
384 return false;
385 }
386}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 15:54:05 +0000