SimplePie::fetch_data() │ protected │ WP 1.0
Fetch the data via SimplePie_File
If the data is already cached, attempt to fetch it from there instead
Метод класса: SimplePie{}
Хуков нет.
Возвращает
Массив|true
. Returns true if the data was loaded from the cache, or an array of HTTP headers and sniffed type
Использование
// protected - в коде основоного (родительского) или дочернего класса $result = $this->fetch_data( $cache );
- $cache(SimplePie_Cache_Base|false) (обязательный) (передается по ссылке — &)
- Cache handler, or false to not load from the cache
Код SimplePie::fetch_data() SimplePie::fetch data WP 6.4.3
protected function fetch_data(&$cache) { // If it's enabled, use the cache if ($cache) { // Load the Cache $this->data = $cache->load(); if (!empty($this->data)) { // If the cache is for an outdated build of SimplePie if (!isset($this->data['build']) || $this->data['build'] !== SIMPLEPIE_BUILD) { $cache->unlink(); $this->data = array(); } // If we've hit a collision just rerun it with caching disabled elseif (isset($this->data['url']) && $this->data['url'] !== $this->feed_url) { $cache = false; $this->data = array(); } // If we've got a non feed_url stored (if the page isn't actually a feed, or is a redirect) use that URL. elseif (isset($this->data['feed_url'])) { // If the autodiscovery cache is still valid use it. if ($cache->mtime() + $this->autodiscovery_cache_duration > time()) { // Do not need to do feed autodiscovery yet. if ($this->data['feed_url'] !== $this->data['url']) { $this->set_feed_url($this->data['feed_url']); return $this->init(); } $cache->unlink(); $this->data = array(); } } // Check if the cache has been updated elseif ($cache->mtime() + $this->cache_duration < time()) { // Want to know if we tried to send last-modified and/or etag headers // when requesting this file. (Note that it's up to the file to // support this, but we don't always send the headers either.) $this->check_modified = true; if (isset($this->data['headers']['last-modified']) || isset($this->data['headers']['etag'])) { $headers = array( 'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', ); if (isset($this->data['headers']['last-modified'])) { $headers['if-modified-since'] = $this->data['headers']['last-modified']; } if (isset($this->data['headers']['etag'])) { $headers['if-none-match'] = $this->data['headers']['etag']; } $file = $this->registry->create('File', array($this->feed_url, $this->timeout/10, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options)); $this->status_code = $file->status_code; if ($file->success) { if ($file->status_code === 304) { // Set raw_data to false here too, to signify that the cache // is still valid. $this->raw_data = false; $cache->touch(); return true; } } else { $this->check_modified = false; if($this->force_cache_fallback) { $cache->touch(); return true; } unset($file); } } } // If the cache is still valid, just return true else { $this->raw_data = false; return true; } } // If the cache is empty, delete it else { $cache->unlink(); $this->data = array(); } } // If we don't already have the file (it'll only exist if we've opened it to check if the cache has been modified), open it. if (!isset($file)) { if ($this->file instanceof SimplePie_File && $this->file->url === $this->feed_url) { $file =& $this->file; } else { $headers = array( 'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1', ); $file = $this->registry->create('File', array($this->feed_url, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options)); } } $this->status_code = $file->status_code; // If the file connection has an error, set SimplePie::error to that and quit if (!$file->success && !($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($file->status_code === 200 || $file->status_code > 206 && $file->status_code < 300))) { $this->error = $file->error; return !empty($this->data); } if (!$this->force_feed) { // Check if the supplied URL is a feed, if it isn't, look for it. $locate = $this->registry->create('Locator', array(&$file, $this->timeout, $this->useragent, $this->max_checked_feeds, $this->force_fsockopen, $this->curl_options)); if (!$locate->is_feed($file)) { $copyStatusCode = $file->status_code; $copyContentType = $file->headers['content-type']; try { $microformats = false; if (class_exists('DOMXpath') && function_exists('Mf2\parse')) { $doc = new DOMDocument(); @$doc->loadHTML($file->body); $xpath = new DOMXpath($doc); // Check for both h-feed and h-entry, as both a feed with no entries // and a list of entries without an h-feed wrapper are both valid. $query = '//*[contains(concat(" ", @class, " "), " h-feed ") or '. 'contains(concat(" ", @class, " "), " h-entry ")]'; $result = $xpath->query($query); $microformats = $result->length !== 0; } // Now also do feed discovery, but if microformats were found don't // overwrite the current value of file. $discovered = $locate->find($this->autodiscovery, $this->all_discovered_feeds); if ($microformats) { if ($hub = $locate->get_rel_link('hub')) { $self = $locate->get_rel_link('self'); $this->store_links($file, $hub, $self); } // Push the current file onto all_discovered feeds so the user can // be shown this as one of the options. if (isset($this->all_discovered_feeds)) { $this->all_discovered_feeds[] = $file; } } else { if ($discovered) { $file = $discovered; } else { // We need to unset this so that if SimplePie::set_file() has // been called that object is untouched unset($file); $this->error = "A feed could not be found at `$this->feed_url`; the status code is `$copyStatusCode` and content-type is `$copyContentType`"; $this->registry->call('Misc', 'error', array($this->error, E_USER_NOTICE, __FILE__, __LINE__)); return false; } } } catch (SimplePie_Exception $e) { // We need to unset this so that if SimplePie::set_file() has been called that object is untouched unset($file); // This is usually because DOMDocument doesn't exist $this->error = $e->getMessage(); $this->registry->call('Misc', 'error', array($this->error, E_USER_NOTICE, $e->getFile(), $e->getLine())); return false; } if ($cache) { $this->data = array('url' => $this->feed_url, 'feed_url' => $file->url, 'build' => SIMPLEPIE_BUILD); if (!$cache->save($this)) { trigger_error("$this->cache_location is not writable. Make sure you've set the correct relative or absolute path, and that the location is server-writable.", E_USER_WARNING); } $cache = $this->registry->call('Cache', 'get_handler', array($this->cache_location, call_user_func($this->cache_name_function, $file->url), 'spc')); } } $this->feed_url = $file->url; $locate = null; } $this->raw_data = $file->body; $this->permanent_url = $file->permanent_url; $headers = $file->headers; $sniffer = $this->registry->create('Content_Type_Sniffer', array(&$file)); $sniffed = $sniffer->get_type(); return array($headers, $sniffed); }