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authortcitworld <thomas.citharet@gmail.com>2014-01-04 12:30:31 -0800
committertcitworld <thomas.citharet@gmail.com>2014-01-04 12:30:31 -0800
commit7f667839764621b5aa01c9db8ce5dde2a29ef18f (patch)
tree93d8241ee81c87e18494325ae02f0589a8e328a2 /inc/poche/Url.class.php
parenta84f77d6ba15a64ff00453f5d5190c021ce460ed (diff)
parent2abcccb37180c17318f5226f5d4bc28f30b621ea (diff)
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Merge pull request #1 from inthepoche/dev
Dev
Diffstat (limited to 'inc/poche/Url.class.php')
-rw-r--r--inc/poche/Url.class.php364
1 files changed, 0 insertions, 364 deletions
diff --git a/inc/poche/Url.class.php b/inc/poche/Url.class.php
index 600a2166..8b3468c3 100644
--- a/inc/poche/Url.class.php
+++ b/inc/poche/Url.class.php
@@ -12,45 +12,6 @@ class Url
12{ 12{
13 public $url; 13 public $url;
14 14
15 private $fingerprints = array(
16 // Posterous
17 '<meta name="generator" content="Posterous"' => array('hostname'=>'fingerprint.posterous.com', 'head'=>true),
18 // Blogger
19 '<meta content=\'blogger\' name=\'generator\'' => array('hostname'=>'fingerprint.blogspot.com', 'head'=>true),
20 '<meta name="generator" content="Blogger"' => array('hostname'=>'fingerprint.blogspot.com', 'head'=>true),
21 // WordPress (self-hosted and hosted)
22 '<meta name="generator" content="WordPress' => array('hostname'=>'fingerprint.wordpress.com', 'head'=>true)
23 );
24
25 private $user_agents = array( 'lifehacker.com' => 'PHP/5.2',
26 'gawker.com' => 'PHP/5.2',
27 'deadspin.com' => 'PHP/5.2',
28 'kotaku.com' => 'PHP/5.2',
29 'jezebel.com' => 'PHP/5.2',
30 'io9.com' => 'PHP/5.2',
31 'jalopnik.com' => 'PHP/5.2',
32 'gizmodo.com' => 'PHP/5.2',
33 '.wikipedia.org' => 'Mozilla/5.2'
34 );
35
36 private $content_type_exc = array(
37 'application/pdf' => array('action'=>'link', 'name'=>'PDF'),
38 'image' => array('action'=>'link', 'name'=>'Image'),
39 'audio' => array('action'=>'link', 'name'=>'Audio'),
40 'video' => array('action'=>'link', 'name'=>'Video')
41 );
42
43 private $rewrite_url = array(
44 // Rewrite public Google Docs URLs to point to HTML view:
45 // if a URL contains docs.google.com, replace /Doc? with /View?
46 'docs.google.com' => array('/Doc?' => '/View?'),
47 'tnr.com' => array('tnr.com/article/' => 'tnr.com/print/article/'),
48 '.m.wikipedia.org' => array('.m.wikipedia.org' => '.wikipedia.org')
49 );
50
51 private $rewrite_relative_urls = true;
52 private $error_message = '[unable to retrieve full-text content]';
53
54 function __construct($url) 15 function __construct($url)
55 { 16 {
56 $this->url = base64_decode($url); 17 $this->url = base64_decode($url);
@@ -67,329 +28,4 @@ class Url
67 public function isCorrect() { 28 public function isCorrect() {
68 return filter_var($this->url, FILTER_VALIDATE_URL) !== FALSE; 29 return filter_var($this->url, FILTER_VALIDATE_URL) !== FALSE;
69 } 30 }
70
71 public function extract() {
72 global $http, $extractor;
73 $extractor = new ContentExtractor(dirname(__FILE__).'/../3rdparty/site_config/custom', dirname(__FILE__).'/../3rdparty/site_config/standard');
74 $extractor->fingerprints = $this->fingerprints;
75
76 $http = new HumbleHttpAgent();
77 $http->userAgentMap = $this->user_agents;
78 $http->headerOnlyTypes = array_keys($this->content_type_exc);
79 $http->rewriteUrls = $this->rewrite_url;
80 $http->userAgentDefault = HumbleHttpAgent::UA_PHP;
81 // configure SimplePie HTTP extension class to use our HumbleHttpAgent instance
82 SimplePie_HumbleHttpAgent::set_agent($http);
83 $feed = new SimplePie();
84 // some feeds use the text/html content type - force_feed tells SimplePie to process anyway
85 $feed->force_feed(true);
86 $feed->set_file_class('SimplePie_HumbleHttpAgent');
87 $feed->feed_url = $this->url;
88 $feed->set_autodiscovery_level(SIMPLEPIE_LOCATOR_NONE);
89 $feed->set_timeout(20);
90 $feed->enable_cache(false);
91 $feed->set_stupidly_fast(true);
92 $feed->enable_order_by_date(false); // we don't want to do anything to the feed
93 $feed->set_url_replacements(array());
94 // initialise the feed
95 // the @ suppresses notices which on some servers causes a 500 internal server error
96 $result = @$feed->init();
97 if ($result && (!is_array($feed->data) || count($feed->data) == 0)) {
98 die('Sorry, no feed items found');
99 }
100 // from now on, we'll identify ourselves as a browser
101 $http->userAgentDefault = HumbleHttpAgent::UA_BROWSER;
102 unset($feed, $result);
103
104 $feed = new DummySingleItemFeed($this->url);
105
106 $items = $feed->get_items(0, 1);
107 // Request all feed items in parallel (if supported)
108 $urls_sanitized = array();
109 $urls = array();
110 foreach ($items as $key => $item) {
111 $permalink = htmlspecialchars_decode($item->get_permalink());
112 // Colons in URL path segments get encoded by SimplePie, yet some sites expect them unencoded
113 $permalink = str_replace('%3A', ':', $permalink);
114 if ($permalink) {
115 $urls_sanitized[] = $permalink;
116 }
117 $urls[$key] = $permalink;
118 }
119 $http->fetchAll($urls_sanitized);
120
121 foreach ($items as $key => $item) {
122 $do_content_extraction = true;
123 $extract_result = false;
124 $permalink = $urls[$key];
125
126 // TODO: Allow error codes - some sites return correct content with error status
127 // e.g. prospectmagazine.co.uk returns 403
128
129 if ($permalink && ($response = $http->get($permalink, true)) && ($response['status_code'] < 300 || $response['status_code'] > 400)) {
130 $effective_url = $response['effective_url'];
131 // check if action defined for returned Content-Type
132 $type = null;
133 if (preg_match('!^Content-Type:\s*(([-\w]+)/([-\w\+]+))!im', $response['headers'], $match)) {
134 // look for full mime type (e.g. image/jpeg) or just type (e.g. image)
135 $match[1] = strtolower(trim($match[1]));
136 $match[2] = strtolower(trim($match[2]));
137 foreach (array($match[1], $match[2]) as $_mime) {
138 if (isset($this->content_type_exc[$_mime])) {
139 $type = $match[1];
140 $_act = $this->content_type_exc[$_mime]['action'];
141 $_name = $this->content_type_exc[$_mime]['name'];
142 if ($_act == 'exclude') {
143 continue 2; // skip this feed item entry
144 } elseif ($_act == 'link') {
145 if ($match[2] == 'image') {
146 $html = "<a href=\"$effective_url\"><img src=\"$effective_url\" alt=\"$_name\" /></a>";
147 } else {
148 $html = "<a href=\"$effective_url\">Download $_name</a>";
149 }
150 $title = $_name;
151 $do_content_extraction = false;
152 break;
153 }
154 }
155 }
156 unset($_mime, $_act, $_name, $match);
157 }
158 if ($do_content_extraction) {
159 $html = $response['body'];
160 // remove strange things
161 $html = str_replace('</[>', '', $html);
162 $html = $this->convert_to_utf8($html, $response['headers']);
163
164 // check site config for single page URL - fetch it if found
165 if ($single_page_response = $this->getSinglePage($item, $html, $effective_url)) {
166 $html = $single_page_response['body'];
167 // remove strange things
168 $html = str_replace('</[>', '', $html);
169 $html = $this->convert_to_utf8($html, $single_page_response['headers']);
170 $effective_url = $single_page_response['effective_url'];
171 unset($single_page_response);
172 }
173 $extract_result = $extractor->process($html, $effective_url);
174 $readability = $extractor->readability;
175 $content_block = ($extract_result) ? $extractor->getContent() : null;
176 }
177 }
178 if ($do_content_extraction) {
179 // if we failed to extract content...
180 if (!$extract_result) {
181 $html = $this->error_message;
182 // keep the original item description
183 $html .= $item->get_description();
184 } else {
185 $readability->clean($content_block, 'select');
186 if ($this->rewrite_relative_urls) $this->makeAbsolute($effective_url, $content_block);
187 if ($content_block->childNodes->length == 1 && $content_block->firstChild->nodeType === XML_ELEMENT_NODE) {
188 $html = $content_block->firstChild->innerHTML;
189 } else {
190 $html = $content_block->innerHTML;
191 }
192 // post-processing cleanup
193 $html = preg_replace('!<p>[\s\h\v]*</p>!u', '', $html);
194 }
195 }
196 }
197
198 $title = ($extractor->getTitle() != '' ? $extractor->getTitle() : _('Untitled'));
199 $content = array ('title' => $title, 'body' => $html);
200
201 return $content;
202 }
203
204 private function convert_to_utf8($html, $header=null)
205 {
206 $encoding = null;
207 if ($html || $header) {
208 if (is_array($header)) $header = implode("\n", $header);
209 if (!$header || !preg_match_all('/^Content-Type:\s+([^;]+)(?:;\s*charset=["\']?([^;"\'\n]*))?/im', $header, $match, PREG_SET_ORDER)) {
210 // error parsing the response
211 } else {
212 $match = end($match); // get last matched element (in case of redirects)
213 if (isset($match[2])) $encoding = trim($match[2], "\"' \r\n\0\x0B\t");
214 }
215 // TODO: check to see if encoding is supported (can we convert it?)
216 // If it's not, result will be empty string.
217 // For now we'll check for invalid encoding types returned by some sites, e.g. 'none'
218 // Problem URL: http://facta.co.jp/blog/archives/20111026001026.html
219 if (!$encoding || $encoding == 'none') {
220 // search for encoding in HTML - only look at the first 35000 characters
221 $html_head = substr($html, 0, 40000);
222 if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $html_head, $match)) {
223 $encoding = trim($match[1], '"\'');
224 } elseif (preg_match('/<meta\s+http-equiv=["\']?Content-Type["\']? content=["\'][^;]+;\s*charset=["\']?([^;"\'>]+)/i', $html_head, $match)) {
225 $encoding = trim($match[1]);
226 } elseif (preg_match_all('/<meta\s+([^>]+)>/i', $html_head, $match)) {
227 foreach ($match[1] as $_test) {
228 if (preg_match('/charset=["\']?([^"\']+)/i', $_test, $_m)) {
229 $encoding = trim($_m[1]);
230 break;
231 }
232 }
233 }
234 }
235 if (isset($encoding)) $encoding = trim($encoding);
236 // trim is important here!
237 if (!$encoding || (strtolower($encoding) == 'iso-8859-1')) {
238 // replace MS Word smart qutoes
239 $trans = array();
240 $trans[chr(130)] = '&sbquo;'; // Single Low-9 Quotation Mark
241 $trans[chr(131)] = '&fnof;'; // Latin Small Letter F With Hook
242 $trans[chr(132)] = '&bdquo;'; // Double Low-9 Quotation Mark
243 $trans[chr(133)] = '&hellip;'; // Horizontal Ellipsis
244 $trans[chr(134)] = '&dagger;'; // Dagger
245 $trans[chr(135)] = '&Dagger;'; // Double Dagger
246 $trans[chr(136)] = '&circ;'; // Modifier Letter Circumflex Accent
247 $trans[chr(137)] = '&permil;'; // Per Mille Sign
248 $trans[chr(138)] = '&Scaron;'; // Latin Capital Letter S With Caron
249 $trans[chr(139)] = '&lsaquo;'; // Single Left-Pointing Angle Quotation Mark
250 $trans[chr(140)] = '&OElig;'; // Latin Capital Ligature OE
251 $trans[chr(145)] = '&lsquo;'; // Left Single Quotation Mark
252 $trans[chr(146)] = '&rsquo;'; // Right Single Quotation Mark
253 $trans[chr(147)] = '&ldquo;'; // Left Double Quotation Mark
254 $trans[chr(148)] = '&rdquo;'; // Right Double Quotation Mark
255 $trans[chr(149)] = '&bull;'; // Bullet
256 $trans[chr(150)] = '&ndash;'; // En Dash
257 $trans[chr(151)] = '&mdash;'; // Em Dash
258 $trans[chr(152)] = '&tilde;'; // Small Tilde
259 $trans[chr(153)] = '&trade;'; // Trade Mark Sign
260 $trans[chr(154)] = '&scaron;'; // Latin Small Letter S With Caron
261 $trans[chr(155)] = '&rsaquo;'; // Single Right-Pointing Angle Quotation Mark
262 $trans[chr(156)] = '&oelig;'; // Latin Small Ligature OE
263 $trans[chr(159)] = '&Yuml;'; // Latin Capital Letter Y With Diaeresis
264 $html = strtr($html, $trans);
265 }
266 if (!$encoding) {
267 $encoding = 'utf-8';
268 } else {
269 if (strtolower($encoding) != 'utf-8') {
270 $html = SimplePie_Misc::change_encoding($html, $encoding, 'utf-8');
271 /*
272 if (function_exists('iconv')) {
273 // iconv appears to handle certain character encodings better than mb_convert_encoding
274 $html = iconv($encoding, 'utf-8', $html);
275 } else {
276 $html = mb_convert_encoding($html, 'utf-8', $encoding);
277 }
278 */
279 }
280 }
281 }
282 return $html;
283 }
284
285 private function makeAbsolute($base, $elem) {
286 $base = new SimplePie_IRI($base);
287 // remove '//' in URL path (used to prevent URLs from resolving properly)
288 // TODO: check if this is still the case
289 if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
290 foreach(array('a'=>'href', 'img'=>'src') as $tag => $attr) {
291 $elems = $elem->getElementsByTagName($tag);
292 for ($i = $elems->length-1; $i >= 0; $i--) {
293 $e = $elems->item($i);
294 //$e->parentNode->replaceChild($articleContent->ownerDocument->createTextNode($e->textContent), $e);
295 $this->makeAbsoluteAttr($base, $e, $attr);
296 }
297 if (strtolower($elem->tagName) == $tag) $this->makeAbsoluteAttr($base, $elem, $attr);
298 }
299 }
300
301 private function makeAbsoluteAttr($base, $e, $attr) {
302 if ($e->hasAttribute($attr)) {
303 // Trim leading and trailing white space. I don't really like this but
304 // unfortunately it does appear on some sites. e.g. <img src=" /path/to/image.jpg" />
305 $url = trim(str_replace('%20', ' ', $e->getAttribute($attr)));
306 $url = str_replace(' ', '%20', $url);
307 if (!preg_match('!https?://!i', $url)) {
308 if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
309 $e->setAttribute($attr, $absolute);
310 }
311 }
312 }
313 }
314
315 private function makeAbsoluteStr($base, $url) {
316 $base = new SimplePie_IRI($base);
317 // remove '//' in URL path (causes URLs not to resolve properly)
318 if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
319 if (preg_match('!^https?://!i', $url)) {
320 // already absolute
321 return $url;
322 } else {
323 if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
324 return $absolute;
325 }
326 return false;
327 }
328 }
329
330 // returns single page response, or false if not found
331 private function getSinglePage($item, $html, $url) {
332 global $http, $extractor;
333 $host = @parse_url($url, PHP_URL_HOST);
334 $site_config = SiteConfig::build($host);
335 if ($site_config === false) {
336 // check for fingerprints
337 if (!empty($extractor->fingerprints) && ($_fphost = $extractor->findHostUsingFingerprints($html))) {
338 $site_config = SiteConfig::build($_fphost);
339 }
340 if ($site_config === false) $site_config = new SiteConfig();
341 SiteConfig::add_to_cache($host, $site_config);
342 return false;
343 } else {
344 SiteConfig::add_to_cache($host, $site_config);
345 }
346 $splink = null;
347 if (!empty($site_config->single_page_link)) {
348 $splink = $site_config->single_page_link;
349 } elseif (!empty($site_config->single_page_link_in_feed)) {
350 // single page link xpath is targeted at feed
351 $splink = $site_config->single_page_link_in_feed;
352 // so let's replace HTML with feed item description
353 $html = $item->get_description();
354 }
355 if (isset($splink)) {
356 // Build DOM tree from HTML
357 $readability = new PocheReadability($html, $url);
358 $xpath = new DOMXPath($readability->dom);
359 // Loop through single_page_link xpath expressions
360 $single_page_url = null;
361 foreach ($splink as $pattern) {
362 $elems = @$xpath->evaluate($pattern, $readability->dom);
363 if (is_string($elems)) {
364 $single_page_url = trim($elems);
365 break;
366 } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
367 foreach ($elems as $item) {
368 if ($item instanceof DOMElement && $item->hasAttribute('href')) {
369 $single_page_url = $item->getAttribute('href');
370 break;
371 } elseif ($item instanceof DOMAttr && $item->value) {
372 $single_page_url = $item->value;
373 break;
374 }
375 }
376 }
377 }
378 // If we've got URL, resolve against $url
379 if (isset($single_page_url) && ($single_page_url = $this->makeAbsoluteStr($url, $single_page_url))) {
380 // check it's not what we have already!
381 if ($single_page_url != $url) {
382 // it's not, so let's try to fetch it...
383 $_prev_ref = $http->referer;
384 $http->referer = $single_page_url;
385 if (($response = $http->get($single_page_url, true)) && $response['status_code'] < 300) {
386 $http->referer = $_prev_ref;
387 return $response;
388 }
389 $http->referer = $_prev_ref;
390 }
391 }
392 }
393 return false;
394 }
395} \ No newline at end of file 31} \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 14:44:15 +0000