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[tt-rss.git] / include / rssfuncs.php
1 <?php
2 define('DAEMON_UPDATE_LOGIN_LIMIT', 30);
3 define('DAEMON_FEED_LIMIT', 100);
4 define('DAEMON_SLEEP_INTERVAL', 60);
5
6 function update_feedbrowser_cache() {
7
8 $result = db_query("SELECT feed_url, site_url, title, COUNT(id) AS subscribers
9 FROM ttrss_feeds WHERE (SELECT COUNT(id) = 0 FROM ttrss_feeds AS tf
10 WHERE tf.feed_url = ttrss_feeds.feed_url
11 AND (private IS true OR auth_login != '' OR auth_pass != '' OR feed_url LIKE '%:%@%/%'))
12 GROUP BY feed_url, site_url, title ORDER BY subscribers DESC LIMIT 1000");
13
14 db_query("BEGIN");
15
16 db_query("DELETE FROM ttrss_feedbrowser_cache");
17
18 $count = 0;
19
20 while ($line = db_fetch_assoc($result)) {
21 $subscribers = db_escape_string($line["subscribers"]);
22 $feed_url = db_escape_string($line["feed_url"]);
23 $title = db_escape_string($line["title"]);
24 $site_url = db_escape_string($line["site_url"]);
25
26 $tmp_result = db_query("SELECT subscribers FROM
27 ttrss_feedbrowser_cache WHERE feed_url = '$feed_url'");
28
29 if (db_num_rows($tmp_result) == 0) {
30
31 db_query("INSERT INTO ttrss_feedbrowser_cache
32 (feed_url, site_url, title, subscribers) VALUES ('$feed_url',
33 '$site_url', '$title', '$subscribers')");
34
35 ++$count;
36
37 }
38
39 }
40
41 db_query("COMMIT");
42
43 return $count;
44
45 }
46
47
48 /**
49 * Update a feed batch.
50 * Used by daemons to update n feeds by run.
51 * Only update feed needing a update, and not being processed
52 * by another process.
53 *
54 * @param mixed $link Database link
55 * @param integer $limit Maximum number of feeds in update batch. Default to DAEMON_FEED_LIMIT.
56 * @param boolean $from_http Set to true if you call this function from http to disable cli specific code.
57 * @param boolean $debug Set to false to disable debug output. Default to true.
58 * @return void
59 */
60 function update_daemon_common($limit = DAEMON_FEED_LIMIT, $from_http = false, $debug = true) {
61 // Process all other feeds using last_updated and interval parameters
62
63 $schema_version = get_schema_version();
64
65 if ($schema_version != SCHEMA_VERSION) {
66 die("Schema version is wrong, please upgrade the database.\n");
67 }
68
69 define('PREFS_NO_CACHE', true);
70
71 // Test if the user has loggued in recently. If not, it does not update its feeds.
72 if (!SINGLE_USER_MODE && DAEMON_UPDATE_LOGIN_LIMIT > 0) {
73 if (DB_TYPE == "pgsql") {
74 $login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
75 } else {
76 $login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
77 }
78 } else {
79 $login_thresh_qpart = "";
80 }
81
82 // Test if the feed need a update (update interval exceded).
83 if (DB_TYPE == "pgsql") {
84 $update_limit_qpart = "AND ((
85 ttrss_feeds.update_interval = 0
86 AND ttrss_user_prefs.value != '-1'
87 AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_user_prefs.value || ' minutes') AS INTERVAL)
88 ) OR (
89 ttrss_feeds.update_interval > 0
90 AND ttrss_feeds.last_updated < NOW() - CAST((ttrss_feeds.update_interval || ' minutes') AS INTERVAL)
91 ) OR ttrss_feeds.last_updated IS NULL
92 OR last_updated = '1970-01-01 00:00:00')";
93 } else {
94 $update_limit_qpart = "AND ((
95 ttrss_feeds.update_interval = 0
96 AND ttrss_user_prefs.value != '-1'
97 AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL CONVERT(ttrss_user_prefs.value, SIGNED INTEGER) MINUTE)
98 ) OR (
99 ttrss_feeds.update_interval > 0
100 AND ttrss_feeds.last_updated < DATE_SUB(NOW(), INTERVAL ttrss_feeds.update_interval MINUTE)
101 ) OR ttrss_feeds.last_updated IS NULL
102 OR last_updated = '1970-01-01 00:00:00')";
103 }
104
105 // Test if feed is currently being updated by another process.
106 if (DB_TYPE == "pgsql") {
107 $updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < NOW() - INTERVAL '5 minutes')";
108 } else {
109 $updstart_thresh_qpart = "AND (ttrss_feeds.last_update_started IS NULL OR ttrss_feeds.last_update_started < DATE_SUB(NOW(), INTERVAL 5 MINUTE))";
110 }
111
112 // Test if there is a limit to number of updated feeds
113 $query_limit = "";
114 if($limit) $query_limit = sprintf("LIMIT %d", $limit);
115
116 $random_qpart = sql_random_function();
117
118 // We search for feed needing update.
119 $result = db_query("SELECT DISTINCT ttrss_feeds.feed_url,$random_qpart
120 FROM
121 ttrss_feeds, ttrss_users, ttrss_user_prefs
122 WHERE
123 ttrss_feeds.owner_uid = ttrss_users.id
124 AND ttrss_users.id = ttrss_user_prefs.owner_uid
125 AND ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL'
126 $login_thresh_qpart $update_limit_qpart
127 $updstart_thresh_qpart
128 ORDER BY $random_qpart $query_limit");
129
130 if($debug) _debug(sprintf("Scheduled %d feeds to update...", db_num_rows($result)));
131
132 // Here is a little cache magic in order to minimize risk of double feed updates.
133 $feeds_to_update = array();
134 while ($line = db_fetch_assoc($result)) {
135 array_push($feeds_to_update, db_escape_string($line['feed_url']));
136 }
137
138 // We update the feed last update started date before anything else.
139 // There is no lag due to feed contents downloads
140 // It prevent an other process to update the same feed.
141
142 if(count($feeds_to_update) > 0) {
143 $feeds_quoted = array();
144
145 foreach ($feeds_to_update as $feed) {
146 array_push($feeds_quoted, "'" . db_escape_string($feed) . "'");
147 }
148
149 db_query(sprintf("UPDATE ttrss_feeds SET last_update_started = NOW()
150 WHERE feed_url IN (%s)", implode(',', $feeds_quoted)));
151 }
152
153 expire_cached_files($debug);
154 expire_lock_files($debug);
155 expire_error_log($debug);
156
157 $nf = 0;
158
159 // For each feed, we call the feed update function.
160 foreach ($feeds_to_update as $feed) {
161 if($debug) _debug("Base feed: $feed");
162
163 //update_rss_feed($line["id"], true);
164
165 // since we have the data cached, we can deal with other feeds with the same url
166
167 $tmp_result = db_query("SELECT DISTINCT ttrss_feeds.id,last_updated
168 FROM ttrss_feeds, ttrss_users, ttrss_user_prefs WHERE
169 ttrss_user_prefs.owner_uid = ttrss_feeds.owner_uid AND
170 ttrss_users.id = ttrss_user_prefs.owner_uid AND
171 ttrss_user_prefs.pref_name = 'DEFAULT_UPDATE_INTERVAL' AND
172 feed_url = '".db_escape_string($feed)."' AND
173 (ttrss_feeds.update_interval > 0 OR
174 ttrss_user_prefs.value != '-1')
175 $login_thresh_qpart
176 ORDER BY ttrss_feeds.id $query_limit");
177
178 if (db_num_rows($tmp_result) > 0) {
179 while ($tline = db_fetch_assoc($tmp_result)) {
180 if($debug) _debug(" => " . $tline["last_updated"] . ", " . $tline["id"]);
181 update_rss_feed($tline["id"], true);
182 ++$nf;
183 }
184 }
185 }
186
187 require_once "digest.php";
188
189 // Send feed digests by email if needed.
190 send_headlines_digests($debug);
191
192 return $nf;
193
194 } // function update_daemon_common
195
196 // ignore_daemon is not used
197 function update_rss_feed($feed, $ignore_daemon = false, $no_cache = false,
198 $override_url = false) {
199
200 require_once "lib/simplepie/simplepie.inc";
201
202 $debug_enabled = defined('DAEMON_EXTENDED_DEBUG') || $_REQUEST['xdebug'];
203
204 if ($debug_enabled) {
205 _debug("update_rss_feed: start");
206 }
207
208 $result = db_query("SELECT id,update_interval,auth_login,
209 feed_url,auth_pass,cache_images,last_updated,
210 mark_unread_on_update, owner_uid,
211 pubsub_state, auth_pass_encrypted
212 FROM ttrss_feeds WHERE id = '$feed'");
213
214 if (db_num_rows($result) == 0) {
215 if ($debug_enabled) {
216 _debug("update_rss_feed: feed $feed NOT FOUND/SKIPPED");
217 }
218 return false;
219 }
220
221 $last_updated = db_fetch_result($result, 0, "last_updated");
222 $owner_uid = db_fetch_result($result, 0, "owner_uid");
223 $mark_unread_on_update = sql_bool_to_bool(db_fetch_result($result,
224 0, "mark_unread_on_update"));
225 $pubsub_state = db_fetch_result($result, 0, "pubsub_state");
226 $auth_pass_encrypted = sql_bool_to_bool(db_fetch_result($result,
227 0, "auth_pass_encrypted"));
228
229 db_query("UPDATE ttrss_feeds SET last_update_started = NOW()
230 WHERE id = '$feed'");
231
232 $auth_login = db_fetch_result($result, 0, "auth_login");
233 $auth_pass = db_fetch_result($result, 0, "auth_pass");
234
235 if ($auth_pass_encrypted) {
236 require_once "crypt.php";
237 $auth_pass = decrypt_string($auth_pass);
238 }
239
240 $cache_images = sql_bool_to_bool(db_fetch_result($result, 0, "cache_images"));
241 $fetch_url = db_fetch_result($result, 0, "feed_url");
242
243 $feed = db_escape_string($feed);
244
245 if ($override_url) $fetch_url = $override_url;
246
247 $date_feed_processed = date('Y-m-d H:i');
248
249 $cache_filename = CACHE_DIR . "/simplepie/" . sha1($fetch_url) . ".feed";
250
251 // Ignore cache if new feed or manual update.
252 $cache_age = ($no_cache || is_null($last_updated) || $last_updated == '1970-01-01 00:00:00') ?
253 30 : get_feed_update_interval($feed) * 60;
254
255 if ($debug_enabled) {
256 _debug("update_rss_feed: cache filename: $cache_filename exists: " . file_exists($cache_filename));
257 _debug("update_rss_feed: cache age: $cache_age; no cache: $no_cache");
258 }
259
260 $cached_feed_data_hash = false;
261
262 $rss = false;
263 $rss_hash = false;
264 $cache_timestamp = file_exists($cache_filename) ? filemtime($cache_filename) : 0;
265 $last_updated_timestamp = strtotime($last_updated);
266
267 $force_refetch = isset($_REQUEST["force_refetch"]);
268
269 if (file_exists($cache_filename) &&
270 is_readable($cache_filename) &&
271 !$auth_login && !$auth_pass &&
272 filemtime($cache_filename) > time() - $cache_age) {
273
274 if ($debug_enabled) {
275 _debug("update_rss_feed: using local cache.");
276 }
277
278 if ($cache_timestamp > $last_updated_timestamp) {
279 @$rss_data = file_get_contents($cache_filename);
280
281 if ($rss_data) {
282 $rss_hash = sha1($rss_data);
283 @$rss = unserialize($rss_data);
284 }
285 } else if (!$force_refetch) {
286 if ($debug_enabled) {
287 _debug("update_rss_feed: local cache valid and older than last_updated, nothing to do.");
288 }
289 return;
290 }
291 }
292
293 if (!$rss) {
294
295 if (!$feed_data) {
296 if ($debug_enabled) {
297 _debug("update_rss_feed: fetching [$fetch_url] (ts: $cache_timestamp/$last_updated_timestamp)");
298 }
299
300 $feed_data = fetch_file_contents($fetch_url, false,
301 $auth_login, $auth_pass, false,
302 $no_cache ? FEED_FETCH_NO_CACHE_TIMEOUT : FEED_FETCH_TIMEOUT,
303 $force_refetch ? 0 : max($last_updated_timestamp, $cache_timestamp));
304
305 global $fetch_curl_used;
306
307 if (!$fetch_curl_used) {
308 $tmp = @gzdecode($feed_data);
309
310 if ($tmp) $feed_data = $tmp;
311 }
312
313 if ($debug_enabled) {
314 _debug("update_rss_feed: fetch done.");
315 }
316
317 }
318
319 if (!$feed_data) {
320 global $fetch_last_error;
321 global $fetch_last_error_code;
322
323 if ($debug_enabled) {
324 _debug("update_rss_feed: unable to fetch: $fetch_last_error [$fetch_last_error_code]");
325 }
326
327 $error_escaped = '';
328
329 // If-Modified-Since
330 if ($fetch_last_error_code != 304) {
331 $error_escaped = db_escape_string($fetch_last_error);
332 } else {
333 if ($debug_enabled) {
334 _debug("update_rss_feed: source claims data not modified, nothing to do.");
335 }
336 }
337
338 db_query(
339 "UPDATE ttrss_feeds SET last_error = '$error_escaped',
340 last_updated = NOW() WHERE id = '$feed'");
341
342 return;
343 }
344 }
345
346 $pluginhost = new PluginHost();
347 $pluginhost->set_debug($debug_enabled);
348 $user_plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
349
350 $pluginhost->load(PLUGINS, PluginHost::KIND_ALL);
351 $pluginhost->load($user_plugins, PluginHost::KIND_USER, $owner_uid);
352 $pluginhost->load_data();
353
354 foreach ($pluginhost->get_hooks(PluginHost::HOOK_FEED_FETCHED) as $plugin) {
355 $feed_data = $plugin->hook_feed_fetched($feed_data);
356 }
357
358 if (!$rss) {
359 $rss = new SimplePie();
360 $rss->set_sanitize_class("SanitizeDummy");
361 // simplepie ignores the above and creates default sanitizer anyway,
362 // so let's override it...
363 $rss->sanitize = new SanitizeDummy();
364 $rss->set_output_encoding('UTF-8');
365 $rss->set_raw_data($feed_data);
366 $rss->enable_cache(false);
367
368 @$rss->init();
369 }
370
371 // print_r($rss);
372
373 $feed = db_escape_string($feed);
374
375 if (!$rss->error()) {
376
377 // cache data for later
378 if (!$auth_pass && !$auth_login && is_writable(CACHE_DIR . "/simplepie")) {
379 $rss_data = serialize($rss);
380 $new_rss_hash = sha1($rss_data);
381
382 if ($new_rss_hash != $rss_hash) {
383 if ($debug_enabled) {
384 _debug("update_rss_feed: saving $cache_filename");
385 }
386 @file_put_contents($cache_filename, serialize($rss));
387 }
388 }
389
390 // We use local pluginhost here because we need to load different per-user feed plugins
391 $pluginhost->run_hooks(PluginHost::HOOK_FEED_PARSED, "hook_feed_parsed", $rss);
392
393 if ($debug_enabled) {
394 _debug("update_rss_feed: processing feed data...");
395 }
396
397 // db_query("BEGIN");
398
399 if (DB_TYPE == "pgsql") {
400 $favicon_interval_qpart = "favicon_last_checked < NOW() - INTERVAL '12 hour'";
401 } else {
402 $favicon_interval_qpart = "favicon_last_checked < DATE_SUB(NOW(), INTERVAL 12 HOUR)";
403 }
404
405 $result = db_query("SELECT title,site_url,owner_uid,
406 (favicon_last_checked IS NULL OR $favicon_interval_qpart) AS
407 favicon_needs_check
408 FROM ttrss_feeds WHERE id = '$feed'");
409
410 $registered_title = db_fetch_result($result, 0, "title");
411 $orig_site_url = db_fetch_result($result, 0, "site_url");
412 $favicon_needs_check = sql_bool_to_bool(db_fetch_result($result, 0,
413 "favicon_needs_check"));
414
415 $owner_uid = db_fetch_result($result, 0, "owner_uid");
416
417 $site_url = db_escape_string(mb_substr(rewrite_relative_url($fetch_url, $rss->get_link()), 0, 245));
418
419 if ($favicon_needs_check || $force_refetch) {
420 if ($debug_enabled) {
421 _debug("update_rss_feed: checking favicon...");
422 }
423
424 check_feed_favicon($site_url, $feed, $link);
425 $favicon_file = ICONS_DIR . "/$feed.ico";
426
427 if (file_exists($favicon_file) && function_exists("imagecreatefromstring")) {
428 require_once "colors.php";
429
430 $favicon_color = db_escape_string(
431 calculate_avg_color($favicon_file));
432
433 $favicon_colorstring = ",favicon_avg_color = '".$favicon_color."'";
434 }
435
436 db_query("UPDATE ttrss_feeds SET favicon_last_checked = NOW()
437 $favicon_colorstring
438 WHERE id = '$feed'");
439 }
440
441 if (!$registered_title || $registered_title == "[Unknown]") {
442
443 $feed_title = db_escape_string($rss->get_title());
444
445 if ($debug_enabled) {
446 _debug("update_rss_feed: registering title: $feed_title");
447 }
448
449 db_query("UPDATE ttrss_feeds SET
450 title = '$feed_title' WHERE id = '$feed'");
451 }
452
453 if ($site_url && $orig_site_url != $site_url) {
454 db_query("UPDATE ttrss_feeds SET
455 site_url = '$site_url' WHERE id = '$feed'");
456 }
457
458 if ($debug_enabled) {
459 _debug("update_rss_feed: loading filters & labels...");
460 }
461
462 $filters = load_filters($feed, $owner_uid);
463 $labels = get_all_labels($owner_uid);
464
465 if ($debug_enabled) {
466 //print_r($filters);
467 _debug("update_rss_feed: " . count($filters) . " filters loaded.");
468 }
469
470 $items = $rss->get_items();
471
472 if (!is_array($items)) {
473 if ($debug_enabled) {
474 _debug("update_rss_feed: no articles found.");
475 }
476
477 db_query("UPDATE ttrss_feeds
478 SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
479
480 return; // no articles
481 }
482
483 if ($pubsub_state != 2 && PUBSUBHUBBUB_ENABLED) {
484
485 if ($debug_enabled) _debug("update_rss_feed: checking for PUSH hub...");
486
487 $feed_hub_url = false;
488
489 $links = $rss->get_links('hub');
490
491 if ($links && is_array($links)) {
492 foreach ($links as $l) {
493 $feed_hub_url = $l;
494 break;
495 }
496 }
497
498 if ($debug_enabled) _debug("update_rss_feed: feed hub url: $feed_hub_url");
499
500 if ($feed_hub_url && function_exists('curl_init') &&
501 !ini_get("open_basedir")) {
502
503 require_once 'lib/pubsubhubbub/subscriber.php';
504
505 $callback_url = get_self_url_prefix() .
506 "/public.php?op=pubsub&id=$feed";
507
508 $s = new Subscriber($feed_hub_url, $callback_url);
509
510 $rc = $s->subscribe($fetch_url);
511
512 if ($debug_enabled)
513 _debug("update_rss_feed: feed hub url found, subscribe request sent.");
514
515 db_query("UPDATE ttrss_feeds SET pubsub_state = 1
516 WHERE id = '$feed'");
517 }
518 }
519
520 if ($debug_enabled) {
521 _debug("update_rss_feed: processing articles...");
522 }
523
524 foreach ($items as $item) {
525 if ($_REQUEST['xdebug'] == 3) {
526 print_r($item);
527 }
528
529 $entry_guid = $item->get_id();
530 if (!$entry_guid) $entry_guid = $item->get_link();
531 if (!$entry_guid) $entry_guid = make_guid_from_title($item->get_title());
532
533 if (!$entry_guid) continue;
534
535 $entry_guid = "$owner_uid,$entry_guid";
536
537 $entry_guid_hashed = db_escape_string('SHA1:' . sha1($entry_guid));
538
539 if ($debug_enabled) {
540 _debug("update_rss_feed: guid $entry_guid / $entry_guid_hashed");
541 }
542
543 $entry_timestamp = "";
544
545 $entry_timestamp = strtotime($item->get_date());
546
547 if ($entry_timestamp == -1 || !$entry_timestamp || $entry_timestamp > time()) {
548 $entry_timestamp = time();
549 $no_orig_date = 'true';
550 } else {
551 $no_orig_date = 'false';
552 }
553
554 $entry_timestamp_fmt = strftime("%Y/%m/%d %H:%M:%S", $entry_timestamp);
555
556 if ($debug_enabled) {
557 _debug("update_rss_feed: date $entry_timestamp [$entry_timestamp_fmt]");
558 }
559
560 $entry_title = html_entity_decode($item->get_title());
561
562 $entry_link = rewrite_relative_url($site_url, $item->get_link());
563
564 if ($debug_enabled) {
565 _debug("update_rss_feed: title $entry_title");
566 _debug("update_rss_feed: link $entry_link");
567 }
568
569 if (!$entry_title) $entry_title = date("Y-m-d H:i:s", $entry_timestamp);;
570
571 $entry_content = $item->get_content();
572 if (!$entry_content) $entry_content = $item->get_description();
573
574 if ($_REQUEST["xdebug"] == 2) {
575 print "update_rss_feed: content: ";
576 print $entry_content;
577 print "\n";
578 }
579
580 $entry_comments = $item->data["comments"];
581
582 if ($item->get_author()) {
583 $entry_author_item = $item->get_author();
584 $entry_author = $entry_author_item->get_name();
585 if (!$entry_author) $entry_author = $entry_author_item->get_email();
586 }
587
588 $entry_guid = db_escape_string(mb_substr($entry_guid, 0, 245));
589
590 $entry_comments = db_escape_string(mb_substr(trim($entry_comments), 0, 245));
591 $entry_author = db_escape_string(mb_substr(trim($entry_author), 0, 245));
592
593 $num_comments = $item->get_item_tags('http://purl.org/rss/1.0/modules/slash/', 'comments');
594
595 if (is_array($num_comments) && is_array($num_comments[0])) {
596 $num_comments = (int) $num_comments[0]["data"];
597 } else {
598 $num_comments = 0;
599 }
600
601 if ($debug_enabled) {
602 _debug("update_rss_feed: author $entry_author");
603 _debug("update_rss_feed: num_comments: $num_comments");
604 _debug("update_rss_feed: looking for tags [1]...");
605 }
606
607 // parse <category> entries into tags
608
609 $additional_tags = array();
610
611 $additional_tags_src = $item->get_categories();
612
613 if (is_array($additional_tags_src)) {
614 foreach ($additional_tags_src as $tobj) {
615 array_push($additional_tags, $tobj->get_term());
616 }
617 }
618
619 if ($debug_enabled) {
620 _debug("update_rss_feed: category tags:");
621 print_r($additional_tags);
622 }
623
624 if ($debug_enabled) {
625 _debug("update_rss_feed: looking for tags [2]...");
626 }
627
628 $entry_tags = array_unique($additional_tags);
629
630 for ($i = 0; $i < count($entry_tags); $i++)
631 $entry_tags[$i] = mb_strtolower($entry_tags[$i], 'utf-8');
632
633 if ($debug_enabled) {
634 //_debug("update_rss_feed: unfiltered tags found:");
635 //print_r($entry_tags);
636 }
637
638 if ($debug_enabled) {
639 _debug("update_rss_feed: done collecting data.");
640 }
641
642 // TODO: less memory-hungry implementation
643
644 if ($debug_enabled) {
645 _debug("update_rss_feed: applying plugin filters..");
646 }
647
648 // FIXME not sure if owner_uid is a good idea here, we may have a base entry without user entry (?)
649 $result = db_query("SELECT plugin_data,title,content,link,tag_cache,author FROM ttrss_entries, ttrss_user_entries
650 WHERE ref_id = id AND (guid = '".db_escape_string($entry_guid)."' OR guid = '$entry_guid_hashed') AND owner_uid = $owner_uid");
651
652 if (db_num_rows($result) != 0) {
653 $entry_plugin_data = db_fetch_result($result, 0, "plugin_data");
654 $stored_article = array("title" => db_fetch_result($result, 0, "title"),
655 "content" => db_fetch_result($result, 0, "content"),
656 "link" => db_fetch_result($result, 0, "link"),
657 "tags" => explode(",", db_fetch_result($result, 0, "tag_cache")),
658 "author" => db_fetch_result($result, 0, "author"));
659 } else {
660 $entry_plugin_data = "";
661 $stored_article = array();
662 }
663
664 $article = array("owner_uid" => $owner_uid, // read only
665 "guid" => $entry_guid, // read only
666 "title" => $entry_title,
667 "content" => $entry_content,
668 "link" => $entry_link,
669 "tags" => $entry_tags,
670 "plugin_data" => $entry_plugin_data,
671 "author" => $entry_author,
672 "stored" => $stored_article);
673
674 foreach ($pluginhost->get_hooks(PluginHost::HOOK_ARTICLE_FILTER) as $plugin) {
675 $article = $plugin->hook_article_filter($article);
676 }
677
678 $entry_tags = $article["tags"];
679 $entry_guid = db_escape_string($entry_guid);
680 $entry_title = db_escape_string($article["title"]);
681 $entry_author = db_escape_string($article["author"]);
682 $entry_link = db_escape_string($article["link"]);
683 $entry_plugin_data = db_escape_string($article["plugin_data"]);
684 $entry_content = $article["content"]; // escaped below
685
686
687 if ($debug_enabled) {
688 _debug("update_rss_feed: plugin data: $entry_plugin_data");
689 }
690
691 if ($cache_images && is_writable(CACHE_DIR . '/images'))
692 cache_images($entry_content, $site_url, $debug_enabled);
693
694 $entry_content = db_escape_string($entry_content, false);
695
696 $content_hash = "SHA1:" . sha1($entry_content);
697
698 db_query("BEGIN");
699
700 $result = db_query("SELECT id FROM ttrss_entries
701 WHERE (guid = '$entry_guid' OR guid = '$entry_guid_hashed')");
702
703 if (db_num_rows($result) == 0) {
704
705 if ($debug_enabled) {
706 _debug("update_rss_feed: base guid [$entry_guid] not found");
707 }
708
709 // base post entry does not exist, create it
710
711 $result = db_query(
712 "INSERT INTO ttrss_entries
713 (title,
714 guid,
715 link,
716 updated,
717 content,
718 content_hash,
719 cached_content,
720 no_orig_date,
721 date_updated,
722 date_entered,
723 comments,
724 num_comments,
725 plugin_data,
726 author)
727 VALUES
728 ('$entry_title',
729 '$entry_guid_hashed',
730 '$entry_link',
731 '$entry_timestamp_fmt',
732 '$entry_content',
733 '$content_hash',
734 '',
735 $no_orig_date,
736 NOW(),
737 '$date_feed_processed',
738 '$entry_comments',
739 '$num_comments',
740 '$entry_plugin_data',
741 '$entry_author')");
742
743 $article_labels = array();
744
745 } else {
746 // we keep encountering the entry in feeds, so we need to
747 // update date_updated column so that we don't get horrible
748 // dupes when the entry gets purged and reinserted again e.g.
749 // in the case of SLOW SLOW OMG SLOW updating feeds
750
751 $base_entry_id = db_fetch_result($result, 0, "id");
752
753 db_query("UPDATE ttrss_entries SET date_updated = NOW()
754 WHERE id = '$base_entry_id'");
755
756 $article_labels = get_article_labels($base_entry_id, $owner_uid);
757 }
758
759 // now it should exist, if not - bad luck then
760
761 $result = db_query("SELECT
762 id,content_hash,no_orig_date,title,plugin_data,guid,
763 ".SUBSTRING_FOR_DATE."(date_updated,1,19) as date_updated,
764 ".SUBSTRING_FOR_DATE."(updated,1,19) as updated,
765 num_comments
766 FROM
767 ttrss_entries
768 WHERE guid = '$entry_guid' OR guid = '$entry_guid_hashed'");
769
770 $entry_ref_id = 0;
771 $entry_int_id = 0;
772
773 if (db_num_rows($result) == 1) {
774
775 if ($debug_enabled) {
776 _debug("update_rss_feed: base guid found, checking for user record");
777 }
778
779 // this will be used below in update handler
780 $orig_content_hash = db_fetch_result($result, 0, "content_hash");
781 $orig_title = db_fetch_result($result, 0, "title");
782 $orig_num_comments = db_fetch_result($result, 0, "num_comments");
783 $orig_date_updated = strtotime(db_fetch_result($result,
784 0, "date_updated"));
785 $orig_plugin_data = db_fetch_result($result, 0, "plugin_data");
786
787 $ref_id = db_fetch_result($result, 0, "id");
788 $entry_ref_id = $ref_id;
789
790 /* $stored_guid = db_fetch_result($result, 0, "guid");
791 if ($stored_guid != $entry_guid_hashed) {
792 if ($debug_enabled) _debug("upgrading compat guid to hashed one");
793
794 db_query("UPDATE ttrss_entries SET guid = '$entry_guid_hashed' WHERE
795 id = '$ref_id'");
796 } */
797
798 // check for user post link to main table
799
800 // do we allow duplicate posts with same GUID in different feeds?
801 if (get_pref("ALLOW_DUPLICATE_POSTS", $owner_uid, false)) {
802 $dupcheck_qpart = "AND (feed_id = '$feed' OR feed_id IS NULL)";
803 } else {
804 $dupcheck_qpart = "";
805 }
806
807 /* Collect article tags here so we could filter by them: */
808
809 $article_filters = get_article_filters($filters, $entry_title,
810 $entry_content, $entry_link, $entry_timestamp, $entry_author,
811 $entry_tags);
812
813 if ($debug_enabled) {
814 _debug("update_rss_feed: article filters: ");
815 if (count($article_filters) != 0) {
816 print_r($article_filters);
817 }
818 }
819
820 if (find_article_filter($article_filters, "filter")) {
821 db_query("COMMIT"); // close transaction in progress
822 continue;
823 }
824
825 $score = calculate_article_score($article_filters);
826
827 if ($debug_enabled) {
828 _debug("update_rss_feed: initial score: $score");
829 }
830
831 $query = "SELECT ref_id, int_id FROM ttrss_user_entries WHERE
832 ref_id = '$ref_id' AND owner_uid = '$owner_uid'
833 $dupcheck_qpart";
834
835 // if ($_REQUEST["xdebug"]) print "$query\n";
836
837 $result = db_query($query);
838
839 // okay it doesn't exist - create user entry
840 if (db_num_rows($result) == 0) {
841
842 if ($debug_enabled) {
843 _debug("update_rss_feed: user record not found, creating...");
844 }
845
846 if ($score >= -500 && !find_article_filter($article_filters, 'catchup')) {
847 $unread = 'true';
848 $last_read_qpart = 'NULL';
849 } else {
850 $unread = 'false';
851 $last_read_qpart = 'NOW()';
852 }
853
854 if (find_article_filter($article_filters, 'mark') || $score > 1000) {
855 $marked = 'true';
856 } else {
857 $marked = 'false';
858 }
859
860 if (find_article_filter($article_filters, 'publish')) {
861 $published = 'true';
862 } else {
863 $published = 'false';
864 }
865
866 // N-grams
867
868 if (DB_TYPE == "pgsql" and defined('_NGRAM_TITLE_DUPLICATE_THRESHOLD')) {
869
870 $result = db_query("SELECT COUNT(*) AS similar FROM
871 ttrss_entries,ttrss_user_entries
872 WHERE ref_id = id AND updated >= NOW() - INTERVAL '7 day'
873 AND similarity(title, '$entry_title') >= "._NGRAM_TITLE_DUPLICATE_THRESHOLD."
874 AND owner_uid = $owner_uid");
875
876 $ngram_similar = db_fetch_result($result, 0, "similar");
877
878 if ($debug_enabled) {
879 _debug("update_rss_feed: N-gram similar results: $ngram_similar");
880 }
881
882 if ($ngram_similar > 0) {
883 $unread = 'false';
884 }
885 }
886
887 $last_marked = ($marked == 'true') ? 'NOW()' : 'NULL';
888 $last_published = ($published == 'true') ? 'NOW()' : 'NULL';
889
890 $result = db_query(
891 "INSERT INTO ttrss_user_entries
892 (ref_id, owner_uid, feed_id, unread, last_read, marked,
893 published, score, tag_cache, label_cache, uuid,
894 last_marked, last_published)
895 VALUES ('$ref_id', '$owner_uid', '$feed', $unread,
896 $last_read_qpart, $marked, $published, '$score', '', '',
897 '', $last_marked, $last_published)");
898
899 if (PUBSUBHUBBUB_HUB && $published == 'true') {
900 $rss_link = get_self_url_prefix() .
901 "/public.php?op=rss&id=-2&key=" .
902 get_feed_access_key(-2, false, $owner_uid);
903
904 $p = new Publisher(PUBSUBHUBBUB_HUB);
905
906 $pubsub_result = $p->publish_update($rss_link);
907 }
908
909 $result = db_query(
910 "SELECT int_id FROM ttrss_user_entries WHERE
911 ref_id = '$ref_id' AND owner_uid = '$owner_uid' AND
912 feed_id = '$feed' LIMIT 1");
913
914 if (db_num_rows($result) == 1) {
915 $entry_int_id = db_fetch_result($result, 0, "int_id");
916 }
917 } else {
918 if ($debug_enabled) {
919 _debug("update_rss_feed: user record FOUND");
920 }
921
922 $entry_ref_id = db_fetch_result($result, 0, "ref_id");
923 $entry_int_id = db_fetch_result($result, 0, "int_id");
924 }
925
926 if ($debug_enabled) {
927 _debug("update_rss_feed: RID: $entry_ref_id, IID: $entry_int_id");
928 }
929
930 $post_needs_update = false;
931 $update_insignificant = false;
932
933 if ($orig_num_comments != $num_comments) {
934 $post_needs_update = true;
935 $update_insignificant = true;
936 }
937
938 if ($entry_plugin_data != $orig_plugin_data) {
939 $post_needs_update = true;
940 $update_insignificant = true;
941 }
942
943 if ($content_hash != $orig_content_hash) {
944 $post_needs_update = true;
945 $update_insignificant = false;
946 }
947
948 if (db_escape_string($orig_title) != $entry_title) {
949 $post_needs_update = true;
950 $update_insignificant = false;
951 }
952
953 // if post needs update, update it and mark all user entries
954 // linking to this post as updated
955 if ($post_needs_update) {
956
957 if (defined('DAEMON_EXTENDED_DEBUG')) {
958 _debug("update_rss_feed: post $entry_guid_hashed needs update...");
959 }
960
961 // print "<!-- post $orig_title needs update : $post_needs_update -->";
962
963 db_query("UPDATE ttrss_entries
964 SET title = '$entry_title', content = '$entry_content',
965 content_hash = '$content_hash',
966 updated = '$entry_timestamp_fmt',
967 num_comments = '$num_comments',
968 plugin_data = '$entry_plugin_data'
969 WHERE id = '$ref_id'");
970
971 if (!$update_insignificant) {
972 if ($mark_unread_on_update) {
973 db_query("UPDATE ttrss_user_entries
974 SET last_read = null, unread = true WHERE ref_id = '$ref_id'");
975 }
976 }
977 }
978 }
979
980 db_query("COMMIT");
981
982 if ($debug_enabled) {
983 _debug("update_rss_feed: assigning labels...");
984 }
985
986 assign_article_to_label_filters($entry_ref_id, $article_filters,
987 $owner_uid, $article_labels);
988
989 if ($debug_enabled) {
990 _debug("update_rss_feed: looking for enclosures...");
991 }
992
993 // enclosures
994
995 $enclosures = array();
996
997 $encs = $item->get_enclosures();
998
999 if (is_array($encs)) {
1000 foreach ($encs as $e) {
1001 $e_item = array(
1002 $e->link, $e->type, $e->length);
1003 array_push($enclosures, $e_item);
1004 }
1005 }
1006
1007 if ($debug_enabled) {
1008 _debug("update_rss_feed: article enclosures:");
1009 print_r($enclosures);
1010 }
1011
1012 db_query("BEGIN");
1013
1014 foreach ($enclosures as $enc) {
1015 $enc_url = db_escape_string($enc[0]);
1016 $enc_type = db_escape_string($enc[1]);
1017 $enc_dur = db_escape_string($enc[2]);
1018
1019 $result = db_query("SELECT id FROM ttrss_enclosures
1020 WHERE content_url = '$enc_url' AND post_id = '$entry_ref_id'");
1021
1022 if (db_num_rows($result) == 0) {
1023 db_query("INSERT INTO ttrss_enclosures
1024 (content_url, content_type, title, duration, post_id) VALUES
1025 ('$enc_url', '$enc_type', '', '$enc_dur', '$entry_ref_id')");
1026 }
1027 }
1028
1029 db_query("COMMIT");
1030
1031 // check for manual tags (we have to do it here since they're loaded from filters)
1032
1033 foreach ($article_filters as $f) {
1034 if ($f["type"] == "tag") {
1035
1036 $manual_tags = trim_array(explode(",", $f["param"]));
1037
1038 foreach ($manual_tags as $tag) {
1039 if (tag_is_valid($tag)) {
1040 array_push($entry_tags, $tag);
1041 }
1042 }
1043 }
1044 }
1045
1046 // Skip boring tags
1047
1048 $boring_tags = trim_array(explode(",", mb_strtolower(get_pref(
1049 'BLACKLISTED_TAGS', $owner_uid, ''), 'utf-8')));
1050
1051 $filtered_tags = array();
1052 $tags_to_cache = array();
1053
1054 if ($entry_tags && is_array($entry_tags)) {
1055 foreach ($entry_tags as $tag) {
1056 if (array_search($tag, $boring_tags) === false) {
1057 array_push($filtered_tags, $tag);
1058 }
1059 }
1060 }
1061
1062 $filtered_tags = array_unique($filtered_tags);
1063
1064 if ($debug_enabled) {
1065 _debug("update_rss_feed: filtered article tags:");
1066 print_r($filtered_tags);
1067 }
1068
1069 // Save article tags in the database
1070
1071 if (count($filtered_tags) > 0) {
1072
1073 db_query("BEGIN");
1074
1075 foreach ($filtered_tags as $tag) {
1076
1077 $tag = sanitize_tag($tag);
1078 $tag = db_escape_string($tag);
1079
1080 if (!tag_is_valid($tag)) continue;
1081
1082 $result = db_query("SELECT id FROM ttrss_tags
1083 WHERE tag_name = '$tag' AND post_int_id = '$entry_int_id' AND
1084 owner_uid = '$owner_uid' LIMIT 1");
1085
1086 if ($result && db_num_rows($result) == 0) {
1087
1088 db_query("INSERT INTO ttrss_tags
1089 (owner_uid,tag_name,post_int_id)
1090 VALUES ('$owner_uid','$tag', '$entry_int_id')");
1091 }
1092
1093 array_push($tags_to_cache, $tag);
1094 }
1095
1096 /* update the cache */
1097
1098 $tags_to_cache = array_unique($tags_to_cache);
1099
1100 $tags_str = db_escape_string(join(",", $tags_to_cache));
1101
1102 db_query("UPDATE ttrss_user_entries
1103 SET tag_cache = '$tags_str' WHERE ref_id = '$entry_ref_id'
1104 AND owner_uid = $owner_uid");
1105
1106 db_query("COMMIT");
1107 }
1108
1109 if (get_pref("AUTO_ASSIGN_LABELS", $owner_uid, false)) {
1110 if ($debug_enabled) {
1111 _debug("update_rss_feed: auto-assigning labels...");
1112 }
1113
1114 foreach ($labels as $label) {
1115 $caption = preg_quote($label["caption"]);
1116
1117 if ($caption && preg_match("/\b$caption\b/i", "$tags_str " . strip_tags($entry_content) . " $entry_title")) {
1118 if (!labels_contains_caption($article_labels, $caption)) {
1119 label_add_article($entry_ref_id, $caption, $owner_uid);
1120 }
1121 }
1122 }
1123 }
1124
1125 if ($debug_enabled) {
1126 _debug("update_rss_feed: article processed");
1127 }
1128 }
1129
1130 if (!$last_updated) {
1131 if ($debug_enabled) {
1132 _debug("update_rss_feed: new feed, catching it up...");
1133 }
1134 catchup_feed($feed, false, $owner_uid);
1135 }
1136
1137 if ($debug_enabled) {
1138 _debug("purging feed...");
1139 }
1140
1141 purge_feed($feed, 0, $debug_enabled);
1142
1143 db_query("UPDATE ttrss_feeds
1144 SET last_updated = NOW(), last_error = '' WHERE id = '$feed'");
1145
1146 // db_query("COMMIT");
1147
1148 } else {
1149
1150 $error_msg = db_escape_string(mb_substr($rss->error(), 0, 245));
1151
1152 if ($debug_enabled) {
1153 _debug("update_rss_feed: error fetching feed: $error_msg");
1154 }
1155
1156 db_query(
1157 "UPDATE ttrss_feeds SET last_error = '$error_msg',
1158 last_updated = NOW() WHERE id = '$feed'");
1159 }
1160
1161 unset($rss);
1162
1163 if ($debug_enabled) {
1164 _debug("update_rss_feed: done");
1165 }
1166
1167 }
1168
1169 function cache_images($html, $site_url, $debug) {
1170 $cache_dir = CACHE_DIR . "/images";
1171
1172 libxml_use_internal_errors(true);
1173
1174 $charset_hack = '<head>
1175 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
1176 </head>';
1177
1178 $doc = new DOMDocument();
1179 $doc->loadHTML($charset_hack . $html);
1180 $xpath = new DOMXPath($doc);
1181
1182 $entries = $xpath->query('(//img[@src])');
1183
1184 foreach ($entries as $entry) {
1185 if ($entry->hasAttribute('src')) {
1186 $src = rewrite_relative_url($site_url, $entry->getAttribute('src'));
1187
1188 $local_filename = CACHE_DIR . "/images/" . sha1($src) . ".png";
1189
1190 if ($debug) _debug("cache_images: downloading: $src to $local_filename");
1191
1192 if (!file_exists($local_filename)) {
1193 $file_content = fetch_file_contents($src);
1194
1195 if ($file_content && strlen($file_content) > 1024) {
1196 file_put_contents($local_filename, $file_content);
1197 }
1198 }
1199
1200 if (file_exists($local_filename)) {
1201 $entry->setAttribute('src', SELF_URL_PATH . '/image.php?url=' .
1202 base64_encode($src));
1203 }
1204 }
1205 }
1206
1207 $node = $doc->getElementsByTagName('body')->item(0);
1208
1209 return $doc->saveXML($node);
1210 }
1211
1212 function expire_error_log($debug) {
1213 if ($debug) _debug("Removing old error log entries...");
1214
1215 if (DB_TYPE == "pgsql") {
1216 db_query("DELETE FROM ttrss_error_log
1217 WHERE created_at < NOW() - INTERVAL '7 days'");
1218 } else {
1219 db_query("DELETE FROM ttrss_error_log
1220 WHERE created_at < DATE_SUB(NOW(), INTERVAL 7 DAY)");
1221 }
1222
1223 }
1224
1225 function expire_lock_files($debug) {
1226 if ($debug) _debug("Removing old lock files...");
1227
1228 $num_deleted = 0;
1229
1230 if (is_writable(LOCK_DIRECTORY)) {
1231 $files = glob(LOCK_DIRECTORY . "/*.lock");
1232
1233 if ($files) {
1234 foreach ($files as $file) {
1235 if (!file_is_locked($file) && time() - filemtime($file) > 86400*2) {
1236 unlink($file);
1237 ++$num_deleted;
1238 }
1239 }
1240 }
1241 }
1242
1243 if ($debug) _debug("Removed $num_deleted files.");
1244 }
1245
1246 function expire_cached_files($debug) {
1247 foreach (array("simplepie", "images", "export", "upload") as $dir) {
1248 $cache_dir = CACHE_DIR . "/$dir";
1249
1250 if ($debug) _debug("Expiring $cache_dir");
1251
1252 $num_deleted = 0;
1253
1254 if (is_writable($cache_dir)) {
1255 $files = glob("$cache_dir/*");
1256
1257 if ($files) {
1258 foreach ($files as $file) {
1259 if (time() - filemtime($file) > 86400*7) {
1260 unlink($file);
1261
1262 ++$num_deleted;
1263 }
1264 }
1265 }
1266 }
1267
1268 if ($debug) _debug("Removed $num_deleted files.");
1269 }
1270 }
1271
1272 /**
1273 * Source: http://www.php.net/manual/en/function.parse-url.php#104527
1274 * Returns the url query as associative array
1275 *
1276 * @param string query
1277 * @return array params
1278 */
1279 function convertUrlQuery($query) {
1280 $queryParts = explode('&', $query);
1281
1282 $params = array();
1283
1284 foreach ($queryParts as $param) {
1285 $item = explode('=', $param);
1286 $params[$item[0]] = $item[1];
1287 }
1288
1289 return $params;
1290 }
1291
1292 function get_article_filters($filters, $title, $content, $link, $timestamp, $author, $tags) {
1293 $matches = array();
1294
1295 foreach ($filters as $filter) {
1296 $match_any_rule = $filter["match_any_rule"];
1297 $inverse = $filter["inverse"];
1298 $filter_match = false;
1299
1300 foreach ($filter["rules"] as $rule) {
1301 $match = false;
1302 $reg_exp = $rule["reg_exp"];
1303 $rule_inverse = $rule["inverse"];
1304
1305 if (!$reg_exp)
1306 continue;
1307
1308 switch ($rule["type"]) {
1309 case "title":
1310 $match = @preg_match("/$reg_exp/i", $title);
1311 break;
1312 case "content":
1313 // we don't need to deal with multiline regexps
1314 $content = preg_replace("/[\r\n\t]/", "", $content);
1315
1316 $match = @preg_match("/$reg_exp/i", $content);
1317 break;
1318 case "both":
1319 // we don't need to deal with multiline regexps
1320 $content = preg_replace("/[\r\n\t]/", "", $content);
1321
1322 $match = (@preg_match("/$reg_exp/i", $title) || @preg_match("/$reg_exp/i", $content));
1323 break;
1324 case "link":
1325 $match = @preg_match("/$reg_exp/i", $link);
1326 break;
1327 case "author":
1328 $match = @preg_match("/$reg_exp/i", $author);
1329 break;
1330 case "tag":
1331 $tag_string = join(",", $tags);
1332 $match = @preg_match("/$reg_exp/i", $tag_string);
1333 break;
1334 }
1335
1336 if ($rule_inverse) $match = !$match;
1337
1338 if ($match_any_rule) {
1339 if ($match) {
1340 $filter_match = true;
1341 break;
1342 }
1343 } else {
1344 $filter_match = $match;
1345 if (!$match) {
1346 break;
1347 }
1348 }
1349 }
1350
1351 if ($inverse) $filter_match = !$filter_match;
1352
1353 if ($filter_match) {
1354 foreach ($filter["actions"] AS $action) {
1355 array_push($matches, $action);
1356
1357 // if Stop action encountered, perform no further processing
1358 if ($action["type"] == "stop") return $matches;
1359 }
1360 }
1361 }
1362
1363 return $matches;
1364 }
1365
1366 function find_article_filter($filters, $filter_name) {
1367 foreach ($filters as $f) {
1368 if ($f["type"] == $filter_name) {
1369 return $f;
1370 };
1371 }
1372 return false;
1373 }
1374
1375 function find_article_filters($filters, $filter_name) {
1376 $results = array();
1377
1378 foreach ($filters as $f) {
1379 if ($f["type"] == $filter_name) {
1380 array_push($results, $f);
1381 };
1382 }
1383 return $results;
1384 }
1385
1386 function calculate_article_score($filters) {
1387 $score = 0;
1388
1389 foreach ($filters as $f) {
1390 if ($f["type"] == "score") {
1391 $score += $f["param"];
1392 };
1393 }
1394 return $score;
1395 }
1396
1397 function labels_contains_caption($labels, $caption) {
1398 foreach ($labels as $label) {
1399 if ($label[1] == $caption) {
1400 return true;
1401 }
1402 }
1403
1404 return false;
1405 }
1406
1407 function assign_article_to_label_filters($id, $filters, $owner_uid, $article_labels) {
1408 foreach ($filters as $f) {
1409 if ($f["type"] == "label") {
1410 if (!labels_contains_caption($article_labels, $f["param"])) {
1411 label_add_article($id, $f["param"], $owner_uid);
1412 }
1413 }
1414 }
1415 }
1416
1417 function make_guid_from_title($title) {
1418 return preg_replace("/[ \"\',.:;]/", "-",
1419 mb_strtolower(strip_tags($title), 'utf-8'));
1420 }
1421
1422
1423 ?>
web-based news feed (RSS/Atom) reader and aggregator; see https://tt-rss.org/