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[tt-rss.git] / plugins / af_redditimgur / init.php
1 <?php
2 use andreskrey\Readability\Readability;
3 use andreskrey\Readability\Configuration;
4
5 class Af_RedditImgur extends Plugin {
6
7         /* @var PluginHost $host */
8         private $host;
9
10         function about() {
11                 return array(1.0,
12                         "Inline images (and other content) in Reddit RSS feeds",
13                         "fox");
14         }
15
16         function flags() {
17                 return array("needs_curl" => true);
18         }
19
20         function init($host) {
21                 $this->host = $host;
22
23                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
24                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
25         }
26
27         function hook_prefs_tab($args) {
28                 if ($args != "prefFeeds") return;
29
30                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Reddit content settings (af_redditimgur)')."\">";
31
32                 $enable_readability = $this->host->get($this, "enable_readability");
33                 $enable_content_dupcheck = $this->host->get($this, "enable_content_dupcheck");
34
35                 print "<form dojoType=\"dijit.form.Form\">";
36
37                 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
38                         evt.preventDefault();
39                         if (this.validate()) {
40                                 console.log(dojo.objectToQuery(this.getValues()));
41                                 new Ajax.Request('backend.php', {
42                                         parameters: dojo.objectToQuery(this.getValues()),
43                                         onComplete: function(transport) {
44                                                 notify_info(transport.responseText);
45                                         }
46                                 });
47                                 //this.reset();
48                         }
49                         </script>";
50
51                 print_hidden("op", "pluginhandler");
52                 print_hidden("method", "save");
53                 print_hidden("plugin", "af_redditimgur");
54
55                 print "<p>" . __("Uses Readability (full-text-rss) implementation by <a target='_blank' href='https://bitbucket.org/fivefilters/'>FiveFilters.org</a>");
56                 print "<p/>";
57
58                 print_checkbox("enable_readability", $enable_readability);
59                 print "&nbsp;<label for=\"enable_readability\">" . __("Extract missing content using Readability") . "</label>";
60
61                 print "<br/>";
62
63                 print_checkbox("enable_content_dupcheck", $enable_content_dupcheck);
64                 print "&nbsp;<label for=\"enable_content_dupcheck\">" . __("Enable additional duplicate checking") . "</label>";
65                 print "<p>"; print_button("submit", __("Save"));
66                 print "</form>";
67
68                 print "</div>";
69         }
70
71         function save() {
72                 $enable_readability = checkbox_to_sql_bool($_POST["enable_readability"]);
73                 $enable_content_dupcheck = checkbox_to_sql_bool($_POST["enable_content_dupcheck"]);
74
75                 $this->host->set($this, "enable_readability", $enable_readability, false);
76                 $this->host->set($this, "enable_content_dupcheck", $enable_content_dupcheck);
77
78                 echo __("Configuration saved");
79         }
80
81         /**
82          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
83          */
84         private function inline_stuff($article, &$doc, $xpath, $debug = false) {
85
86                 $entries = $xpath->query('(//a[@href]|//img[@src])');
87                 $img_entries = $xpath->query("(//img[@src])");
88
89                 $found = false;
90                 //$debug = 1;
91
92                 foreach ($entries as $entry) {
93                         if ($entry->hasAttribute("href") && strpos($entry->getAttribute("href"), "reddit.com") === FALSE) {
94
95                                 _debug("processing href: " . $entry->getAttribute("href"), $debug);
96
97                                 $matches = array();
98
99                                 if (!$found && preg_match("/^https?:\/\/twitter.com\/(.*?)\/status\/(.*)/", $entry->getAttribute("href"), $matches)) {
100                                         _debug("handling as twitter: " . $matches[1] . " " . $matches[2], $debug);
101
102                                         $oembed_result = fetch_file_contents("https://publish.twitter.com/oembed?url=" . urlencode($entry->getAttribute("href")));
103
104                                         if ($oembed_result) {
105                                                 $oembed_result = json_decode($oembed_result, true);
106
107                                                 if ($oembed_result && isset($oembed_result["html"])) {
108
109                                                         $tmp = new DOMDocument();
110                                                         if ($tmp->loadHTML('<?xml encoding="utf-8" ?>' . $oembed_result["html"])) {
111                                                                 $p = $doc->createElement("p");
112
113                                                                 $p->appendChild($doc->importNode(
114                                                                         $tmp->getElementsByTagName("blockquote")->item(0), TRUE));
115
116                                                                 $br = $doc->createElement('br');
117                                                                 $entry->parentNode->insertBefore($p, $entry);
118                                                                 $entry->parentNode->insertBefore($br, $entry);
119
120                                                                 $found = 1;
121                                                         }
122                                                 }
123                                         }
124                                 }
125
126                                 if (!$found && preg_match("/\.gfycat.com\/([a-z]+)?(\.[a-z]+)$/i", $entry->getAttribute("href"), $matches)) {
127                                         $entry->setAttribute("href", "http://www.gfycat.com/".$matches[1]);
128                                 }
129
130                                 if (!$found && preg_match("/https?:\/\/(www\.)?gfycat.com\/([a-z]+)$/i", $entry->getAttribute("href"), $matches)) {
131
132                                         _debug("Handling as Gfycat", $debug);
133
134                                         $tmp = fetch_file_contents($entry->getAttribute("href"));
135
136                                         if ($tmp) {
137                                                 $tmpdoc = new DOMDocument();
138
139                                                 if (@$tmpdoc->loadHTML($tmp)) {
140                                                         $tmpxpath = new DOMXPath($tmpdoc);
141
142                                                         $source_node = $tmpxpath->query("//video[contains(@class,'share-video')]//source[contains(@src, '.mp4')]")->item(0);
143                                                         $poster_node = $tmpxpath->query("//video[contains(@class,'share-video') and @poster]")->item(0);
144
145                                                         if ($source_node && $poster_node) {
146                                                                 $source_stream = $source_node->getAttribute("src");
147                                                                 $poster_url = $poster_node->getAttribute("poster");
148
149                                                                 $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
150                                                                 $found = 1;
151                                                         }
152                                                 }
153                                         }
154                                 }
155
156                                 if (!$found && preg_match("/https?:\/\/v\.redd\.it\/(.*)$/i", $entry->getAttribute("href"), $matches)) {
157
158                                         _debug("Handling as reddit inline video", $debug);
159
160                                         $img = $img_entries->item(0);
161
162                                         if ($img) {
163                                                 $poster_url = $img->getAttribute("src");
164                                         } else {
165                                                 $poster_url = false;
166                                         }
167
168                                         // Get original article URL from v.redd.it redirects
169                                         $source_article_url = $this->get_location($matches[0]);
170                                         _debug("Resolved ".$matches[0]." to ".$source_article_url, $debug);
171
172                                         $source_stream = false;
173
174                                         if ($source_article_url) {
175                                                 $j = json_decode(fetch_file_contents($source_article_url.".json"), true);
176
177                                                 if ($j) {
178                                                         foreach ($j as $listing) {
179                                                                 foreach ($listing["data"]["children"] as $child) {
180                                                                         if ($child["data"]["url"] == $matches[0]) {
181                                                                                 try {
182                                                                                         $source_stream = $child["data"]["media"]["reddit_video"]["fallback_url"];
183                                                                                 }
184                                                                                 catch (Exception $e) {
185                                                                                 }
186                                                                                 break 2;
187                                                                         }
188                                                                 }
189                                                         }
190                                                 }
191                                         }
192
193                                         if (!$source_stream) {
194                                                 $source_stream = "https://v.redd.it/" . $matches[1] . "/DASH_600_K";
195                                         }
196
197                                         $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
198                                         $found = 1;
199                                 }
200
201                                 if (!$found && preg_match("/https?:\/\/(www\.)?streamable.com\//i", $entry->getAttribute("href"))) {
202
203                                         _debug("Handling as Streamable", $debug);
204
205                                         $tmp = fetch_file_contents($entry->getAttribute("href"));
206
207                                         if ($tmp) {
208                                                 $tmpdoc = new DOMDocument();
209
210                                                 if (@$tmpdoc->loadHTML($tmp)) {
211                                                         $tmpxpath = new DOMXPath($tmpdoc);
212
213                                                         $source_node = $tmpxpath->query("//video[contains(@class,'video-player-tag')]//source[contains(@src, '.mp4')]")->item(0);
214                                                         $poster_node = $tmpxpath->query("//video[contains(@class,'video-player-tag') and @poster]")->item(0);
215
216                                                         if ($source_node && $poster_node) {
217                                                                 $source_stream = $source_node->getAttribute("src");
218                                                                 $poster_url = $poster_node->getAttribute("poster");
219
220                                                                 $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
221                                                                 $found = 1;
222                                                         }
223                                                 }
224                                         }
225                                 }
226
227                                 // imgur .gif -> .gifv
228                                 if (!$found && preg_match("/i\.imgur\.com\/(.*?)\.gif$/i", $entry->getAttribute("href"))) {
229                                         _debug("Handling as imgur gif (->gifv)", $debug);
230
231                                         $entry->setAttribute("href",
232                                                 str_replace(".gif", ".gifv", $entry->getAttribute("href")));
233                                 }
234
235                                 if (!$found && preg_match("/\.(gifv|mp4)$/i", $entry->getAttribute("href"))) {
236                                         _debug("Handling as imgur gifv", $debug);
237
238                                         $source_stream = str_replace(".gifv", ".mp4", $entry->getAttribute("href"));
239
240                                         if (strpos($source_stream, "imgur.com") !== FALSE)
241                                                 $poster_url = str_replace(".mp4", "h.jpg", $source_stream);
242
243                                         $this->handle_as_video($doc, $entry, $source_stream, $poster_url, $debug);
244
245                                         $found = true;
246                                 }
247
248                                 $matches = array();
249                                 if (!$found && preg_match("/youtube\.com\/v\/([\w-]+)/", $entry->getAttribute("href"), $matches) ||
250                                         preg_match("/youtube\.com\/.*?[\&\?]v=([\w-]+)/", $entry->getAttribute("href"), $matches) ||
251                                         preg_match("/youtube\.com\/watch\?v=([\w-]+)/", $entry->getAttribute("href"), $matches) ||
252                                         preg_match("/\/\/youtu.be\/([\w-]+)/", $entry->getAttribute("href"), $matches)) {
253
254                                         $vid_id = $matches[1];
255
256                                         _debug("Handling as youtube: $vid_id", $debug);
257
258                                         $iframe = $doc->createElement("iframe");
259                                         $iframe->setAttribute("class", "youtube-player");
260                                         $iframe->setAttribute("type", "text/html");
261                                         $iframe->setAttribute("width", "640");
262                                         $iframe->setAttribute("height", "385");
263                                         $iframe->setAttribute("src", "https://www.youtube.com/embed/$vid_id");
264                                         $iframe->setAttribute("allowfullscreen", "1");
265                                         $iframe->setAttribute("frameborder", "0");
266
267                                         $br = $doc->createElement('br');
268                                         $entry->parentNode->insertBefore($iframe, $entry);
269                                         $entry->parentNode->insertBefore($br, $entry);
270
271                                         $found = true;
272                                 }
273
274                                 if (!$found && preg_match("/\.(jpg|jpeg|gif|png)(\?[0-9][0-9]*)?$/i", $entry->getAttribute("href")) ||
275                                         mb_strpos($entry->getAttribute("href"), "i.reddituploads.com") !== FALSE ||
276                                         mb_strpos($this->get_content_type($entry->getAttribute("href")), "image/") !== FALSE) {
277
278                                         _debug("Handling as a picture", $debug);
279
280                                         $img = $doc->createElement('img');
281                                         $img->setAttribute("src", $entry->getAttribute("href"));
282
283                                         $br = $doc->createElement('br');
284                                         $entry->parentNode->insertBefore($img, $entry);
285                                         $entry->parentNode->insertBefore($br, $entry);
286
287                                         $found = true;
288                                 }
289
290                                 // linked albums & pages
291
292                                 /*if (!$found && preg_match("/^https?:\/\/(m\.)?imgur.com\/([^\.\/]+$)/", $entry->getAttribute("href"), $matches) ||
293                                         preg_match("/^https?:\/\/(m\.)?imgur.com\/(a|album|gallery)\/[^\.]+$/", $entry->getAttribute("href"), $matches)) {
294
295                                         _debug("Handling as an imgur page/album/gallery", $debug);
296
297                                         $album_content = fetch_file_contents($entry->getAttribute("href"),
298                                                 false, false, false, false, 10);
299
300                                         if ($album_content) {
301                                                 $adoc = new DOMDocument();
302
303                                                 if (@$adoc->loadHTML($album_content)) {
304                                                         $axpath = new DOMXPath($adoc);
305
306                                                         $aentries = $axpath->query("(//div[@class='post-image']/img[@src] | //a[@class='zoom']/img[@src] | //div[@class='video-elements']/source)");
307                                                         $urls = [];
308
309                                                         foreach ($aentries as $aentry) {
310
311                                                                 $url = $aentry->getAttribute("src");
312
313                                                                 if (!in_array($url, $urls)) {
314
315                                                                         if ($aentry->tagName == "img") {
316
317                                                                                 $img = $doc->createElement('img');
318                                                                                 $img->setAttribute("src", $url);
319                                                                                 $entry->parentNode->insertBefore($doc->createElement('br'), $entry);
320
321                                                                                 $br = $doc->createElement('br');
322
323                                                                                 $entry->parentNode->insertBefore($img, $entry);
324                                                                                 $entry->parentNode->insertBefore($br, $entry);
325                                                                         } else if ($aentry->tagName == "source") {
326
327                                                                                 if (strpos($url, "imgur.com") !== FALSE)
328                                                                                         $poster_url = str_replace(".mp4", "h.jpg", $url);
329                                                                                 else
330                                                                                         $poster_url = "";
331
332                                                                                 $this->handle_as_video($doc, $entry, $url, $poster_url);
333
334                                                                         }
335
336                                                                         array_push($urls, $url);
337
338                                                                         $found = true;
339                                                                 }
340
341                                                         }
342
343                                                         if ($debug) print_r($urls);
344                                                 }
345                                         }
346                                 } */
347
348                                 // wtf is this even
349                                 if (!$found && preg_match("/^https?:\/\/gyazo\.com\/([^\.\/]+$)/", $entry->getAttribute("href"), $matches)) {
350                                         $img_id = $matches[1];
351
352                                         _debug("handling as gyazo: $img_id", $debug);
353
354                                         $img = $doc->createElement('img');
355                                         $img->setAttribute("src", "https://i.gyazo.com/$img_id.jpg");
356
357                                         $br = $doc->createElement('br');
358                                         $entry->parentNode->insertBefore($img, $entry);
359                                         $entry->parentNode->insertBefore($br, $entry);
360
361                                         $found = true;
362                                 }
363
364                                 // let's try meta properties
365                                 if (!$found) {
366                                         _debug("looking for meta og:image", $debug);
367
368                                         $content = fetch_file_contents(["url" => $entry->getAttribute("href"),
369                                                 "http_accept" => "text/*"]);
370
371                                         if ($content) {
372                                                 $cdoc = new DOMDocument();
373
374                                                 if (@$cdoc->loadHTML($content)) {
375                                                         $cxpath = new DOMXPath($cdoc);
376
377                                                         $og_image = $cxpath->query("//meta[@property='og:image']")->item(0);
378
379                                                         if ($og_image) {
380
381                                                                 $og_src = $og_image->getAttribute("content");
382
383                                                                 if ($og_src) {
384                                                                         $img = $doc->createElement('img');
385                                                                         $img->setAttribute("src", $og_src);
386
387                                                                         $br = $doc->createElement('br');
388                                                                         $entry->parentNode->insertBefore($img, $entry);
389                                                                         $entry->parentNode->insertBefore($br, $entry);
390
391                                                                         $found = true;
392                                                                 }
393                                                         }
394                                                 }
395                                         }
396                                 }
397
398                         }
399
400                         // remove tiny thumbnails
401                         if ($entry->hasAttribute("src")) {
402                                 if ($entry->parentNode && $entry->parentNode->parentNode) {
403                                         $entry->parentNode->parentNode->removeChild($entry->parentNode);
404                                 }
405                         }
406                 }
407
408                 return $found;
409         }
410
411         function hook_article_filter($article) {
412
413                 if (strpos($article["link"], "reddit.com/r/") !== FALSE) {
414                         $doc = new DOMDocument();
415                         @$doc->loadHTML($article["content"]);
416                         $xpath = new DOMXPath($doc);
417
418                         $content_link = $xpath->query("(//a[contains(., '[link]')])")->item(0);
419
420                         if ($this->host->get($this, "enable_content_dupcheck")) {
421
422                                 if ($content_link) {
423                                         $content_href = $content_link->getAttribute("href");
424                                         $entry_guid = $article["guid_hashed"];
425                                         $owner_uid = $article["owner_uid"];
426
427                                         if (DB_TYPE == "pgsql") {
428                                                 $interval_qpart = "date_entered < NOW() - INTERVAL '1 day'";
429                                         } else {
430                                                 $interval_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 DAY)";
431                                         }
432
433                                         $sth = $this->pdo->prepare("SELECT COUNT(id) AS cid
434                                                 FROM ttrss_entries, ttrss_user_entries WHERE
435                                                         ref_id = id AND
436                                                         $interval_qpart AND
437                                                         guid != ? AND
438                                                         owner_uid = ? AND
439                                                         content LIKE ?");
440
441                                         $sth->execute([$entry_guid, $owner_uid, "%href=\"$content_href\">[link]%"]);
442
443                                         if ($row = $sth->fetch()) {
444                                                 $num_found = $row['cid'];
445
446                                                 if ($num_found > 0) $article["force_catchup"] = true;
447                                         }
448                                 }
449                         }
450
451                         $found = $this->inline_stuff($article, $doc, $xpath);
452
453                         $node = $doc->getElementsByTagName('body')->item(0);
454
455                         if ($node && $found) {
456                                 $article["content"] = $doc->saveHTML($node);
457                         } else if ($content_link) {
458                                 $article = $this->readability($article, $content_link->getAttribute("href"), $doc, $xpath);
459                         }
460                 }
461
462                 return $article;
463         }
464
465         function api_version() {
466                 return 2;
467         }
468
469         private function handle_as_video($doc, $entry, $source_stream, $poster_url = false, $debug = false) {
470
471                 _debug("handle_as_video: $source_stream", $debug);
472
473                 $video = $doc->createElement('video');
474                 $video->setAttribute("autoplay", "1");
475                 $video->setAttribute("controls", "1");
476                 $video->setAttribute("loop", "1");
477
478                 if ($poster_url) $video->setAttribute("poster", $poster_url);
479
480                 $source = $doc->createElement('source');
481                 $source->setAttribute("src", $source_stream);
482                 $source->setAttribute("type", "video/mp4");
483
484                 $video->appendChild($source);
485
486                 $br = $doc->createElement('br');
487                 $entry->parentNode->insertBefore($video, $entry);
488                 $entry->parentNode->insertBefore($br, $entry);
489
490                 $img = $doc->createElement('img');
491                 $img->setAttribute("src",
492                         "data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D");
493
494                 $entry->parentNode->insertBefore($img, $entry);
495         }
496
497         function testurl() {
498                 $url = htmlspecialchars($_REQUEST["url"]);
499
500                 header("Content-type: text/plain");
501
502                 print "URL: $url\n";
503
504                 $doc = new DOMDocument();
505                 @$doc->loadHTML("<html><body><a href=\"$url\">[link]</a></body>");
506                 $xpath = new DOMXPath($doc);
507
508                 $found = $this->inline_stuff([], $doc, $xpath, true);
509
510                 print "Inline result: $found\n";
511
512                 if (!$found) {
513                         print "\nReadability result:\n";
514
515                         $article = $this->readability([], $url, $doc, $xpath, true);
516
517                         print_r($article);
518                 } else {
519                         print "\nResulting HTML:\n";
520
521                         print $doc->saveHTML();
522                 }
523         }
524
525         private function get_header($url, $useragent = SELF_USER_AGENT, $header) {
526                 $ret = false;
527
528                 if (function_exists("curl_init") && !defined("NO_CURL")) {
529                         $ch = curl_init($url);
530                         curl_setopt($ch, CURLOPT_TIMEOUT, 5);
531                         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
532                         curl_setopt($ch, CURLOPT_HEADER, true);
533                         curl_setopt($ch, CURLOPT_NOBODY, true);
534                         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir"));
535                         curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
536
537                         @curl_exec($ch);
538                         $ret = curl_getinfo($ch, $header);
539                 }
540
541                 return $ret;
542         }
543
544         private function get_content_type($url, $useragent = SELF_USER_AGENT) {
545                 return $this->get_header($url, $useragent, CURLINFO_CONTENT_TYPE);
546         }
547
548         private function get_location($url, $useragent = SELF_USER_AGENT) {
549                 return $this->get_header($url, $useragent, CURLINFO_EFFECTIVE_URL);
550         }
551
552         /**
553          * @SuppressWarnings(PHPMD.UnusedFormalParameter)
554          */
555         private function readability($article, $url, $doc, $xpath, $debug = false) {
556
557                 if (!defined('NO_CURL') && function_exists("curl_init") && $this->host->get($this, "enable_readability") &&
558                         mb_strlen(strip_tags($article["content"])) <= 150) {
559
560                         // do not try to embed posts linking back to other reddit posts
561                         if ($url &&     strpos($url, "reddit.com") === FALSE) {
562
563                                 /* link may lead to a huge video file or whatever, we need to check content type before trying to
564                                 parse it which p much requires curl */
565
566                                 $useragent_compat = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)";
567
568                                 $content_type = $this->get_content_type($url, $useragent_compat);
569
570                                 if ($content_type && strpos($content_type, "text/html") !== FALSE) {
571
572                                         $tmp = fetch_file_contents(["url" => $url,
573                                                 "useragent" => $useragent_compat,
574                                                 "http_accept" => "text/html"]);
575
576                                         if ($debug) _debug("tmplen: " . mb_strlen($tmp));
577
578                                         if ($tmp && mb_strlen($tmp) < 1024 * 500) {
579
580                                                 $r = new Readability(new Configuration());
581
582                                                 try {
583                                                         if ($r->parse($tmp)) {
584
585                                                                 $tmpxpath = new DOMXPath($r->getDOMDocument());
586
587                                                                 $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
588
589                                                                 foreach ($entries as $entry) {
590                                                                         if ($entry->hasAttribute("href")) {
591                                                                                 $entry->setAttribute("href",
592                                                                                         rewrite_relative_url($url, $entry->getAttribute("href")));
593
594                                                                         }
595
596                                                                         if ($entry->hasAttribute("src")) {
597                                                                                 $entry->setAttribute("src",
598                                                                                         rewrite_relative_url($url, $entry->getAttribute("src")));
599
600                                                                         }
601
602                                                                 }
603
604                                                                 $article["content"] = $r->getContent() . "<hr/>" . $article["content"];
605                                                         }
606                                                 } catch (ParseException $e) {
607                                                         //
608                                                 }
609                                         }
610                                 }
611                         }
612                 }
613
614                 return $article;
615         }
616 }