first import
This commit is contained in:
Bachir Soussi Chiadmi
590
sites/all/modules/feeds/libraries/common_syndication_parser.inc
Normal file
590
sites/all/modules/feeds/libraries/common_syndication_parser.inc
Normal file
@@ -0,0 +1,590 @@
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<?php
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/**
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* @file
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* Downloading and parsing functions for Common Syndication Parser.
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* Pillaged from FeedAPI common syndication parser.
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*
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* @todo Restructure. OO could work wonders here.
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* @todo Write unit tests.
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* @todo Keep in Feeds project or host on Drupal?
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*/
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/**
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* Parse the feed into a data structure.
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*
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* @param $feed
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* The feed object (contains the URL or the parsed XML structure.
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* @return
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* stdClass The structured datas extracted from the feed.
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*/
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function common_syndication_parser_parse($string) {
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if (!defined('LIBXML_VERSION') || (version_compare(phpversion(), '5.1.0', '<'))) {
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@ $xml = simplexml_load_string($string, NULL);
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}
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else {
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@ $xml = simplexml_load_string($string, NULL, LIBXML_NOERROR | LIBXML_NOWARNING | LIBXML_NOCDATA);
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}
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// Got a malformed XML.
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if ($xml === FALSE || is_null($xml)) {
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return FALSE;
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}
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$feed_type = _parser_common_syndication_feed_format_detect($xml);
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if ($feed_type == "atom1.0") {
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return _parser_common_syndication_atom10_parse($xml);
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}
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if ($feed_type == "RSS2.0" || $feed_type == "RSS0.91" || $feed_type == "RSS0.92") {
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return _parser_common_syndication_RSS20_parse($xml);
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}
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if ($feed_type == "RDF") {
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return _parser_common_syndication_RDF10_parse($xml);
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}
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return FALSE;
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}
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/**
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* Get the cached version of the <var>$url</var>
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*/
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function _parser_common_syndication_cache_get($url) {
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$cache_file = _parser_common_syndication_sanitize_cache() . '/' . md5($url);
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if (file_exists($cache_file)) {
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$file_content = file_get_contents($cache_file);
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return unserialize($file_content);
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}
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return FALSE;
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}
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/**
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* Determine the feed format of a SimpleXML parsed object structure.
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*
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* @param $xml
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* SimpleXML-preprocessed feed.
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* @return
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* The feed format short description or FALSE if not compatible.
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*/
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function _parser_common_syndication_feed_format_detect($xml) {
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if (!is_object($xml)) {
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return FALSE;
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}
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$attr = $xml->attributes();
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$type = strtolower($xml->getName());
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if (isset($xml->entry) && $type == "feed") {
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return "atom1.0";
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}
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if ($type == "rss" && $attr["version"] == "2.0") {
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return "RSS2.0";
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}
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if ($type == "rdf" && isset($xml->channel)) {
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return "RDF";
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}
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if ($type == "rss" && $attr["version"] == "0.91") {
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return "RSS0.91";
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}
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if ($type == "rss" && $attr["version"] == "0.92") {
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return "RSS0.92";
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}
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return FALSE;
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}
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/**
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* Parse atom feeds.
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*/
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function _parser_common_syndication_atom10_parse($feed_XML) {
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$parsed_source = array();
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$ns = array(
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"georss" => "http://www.georss.org/georss",
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);
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$base = $feed_XML->xpath("@base");
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$base = (string) array_shift($base);
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if (!valid_url($base, TRUE)) {
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$base = FALSE;
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}
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// Detect the title
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$parsed_source['title'] = isset($feed_XML->title) ? _parser_common_syndication_title("{$feed_XML->title}") : "";
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// Detect the description
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$parsed_source['description'] = isset($feed_XML->subtitle) ? "{$feed_XML->subtitle}" : "";
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$parsed_source['link'] = _parser_common_syndication_link($feed_XML->link);
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if (valid_url($parsed_source['link']) && !valid_url($parsed_source['link'], TRUE) && !empty($base)) {
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$parsed_source['link'] = $base . $parsed_source['link'];
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}
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$parsed_source['items'] = array();
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foreach ($feed_XML->entry as $news) {
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$original_url = NULL;
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$guid = !empty($news->id) ? "{$news->id}" : NULL;
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if (valid_url($guid, TRUE)) {
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$original_url = $guid;
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}
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$georss = (array)$news->children($ns["georss"]);
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$geoname = '';
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if (isset($georss['featureName'])) {
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$geoname = "{$georss['featureName']}";
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}
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$latlon =
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$lat =
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$lon = NULL;
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if (isset($georss['point'])) {
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$latlon = explode(' ', $georss['point']);
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$lat = "{$latlon[0]}";
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$lon = "{$latlon[1]}";
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if (!$geoname) {
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$geoname = "{$lat} {$lon}";
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}
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}
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$additional_taxonomies = array();
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if (isset($news->category)) {
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$additional_taxonomies['ATOM Categories'] = array();
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$additional_taxonomies['ATOM Domains'] = array();
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foreach ($news->category as $category) {
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if (isset($category['scheme'])) {
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$domain = "{$category['scheme']}";
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if (!empty($domain)) {
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if (!isset($additional_taxonomies['ATOM Domains'][$domain])) {
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$additional_taxonomies['ATOM Domains'][$domain] = array();
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}
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$additional_taxonomies['ATOM Domains'][$domain][] = count($additional_taxonomies['ATOM Categories']) - 1;
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}
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}
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$additional_taxonomies['ATOM Categories'][] = "{$category['term']}";
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}
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}
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$title = "{$news->title}";
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$body = '';
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if (!empty($news->content)) {
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foreach ($news->content->children() as $child) {
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$body .= $child->asXML();
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}
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$body .= "{$news->content}";
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}
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elseif (!empty($news->summary)) {
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foreach ($news->summary->children() as $child) {
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$body .= $child->asXML();
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}
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$body .= "{$news->summary}";
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}
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if (!empty($news->content['src'])) {
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// some src elements in some valid atom feeds contained no urls at all
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if (valid_url("{$news->content['src']}", TRUE)) {
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$original_url = "{$news->content['src']}";
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}
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}
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$author_found = FALSE;
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if (!empty($news->source->author->name)) {
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$original_author = "{$news->source->author->name}";
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$author_found = TRUE;
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}
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elseif (!empty($news->author->name)) {
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$original_author = "{$news->author->name}";
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$author_found = TRUE;
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}
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if (!empty($feed_XML->author->name) && !$author_found) {
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$original_author = "{$feed_XML->author->name}";
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}
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$original_url = _parser_common_syndication_link($news->link);
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$item = array();
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$item['title'] = _parser_common_syndication_title($title, $body);
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$item['description'] = $body;
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$item['author_name'] = $original_author;
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// Fall back to updated for timestamp if both published and issued are
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// empty.
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if (isset($news->published)) {
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$item['timestamp'] = _parser_common_syndication_parse_date("{$news->published}");
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}
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elseif (isset($news->issued)) {
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$item['timestamp'] = _parser_common_syndication_parse_date("{$news->issued}");
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}
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elseif (isset($news->updated)) {
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$item['timestamp'] = _parser_common_syndication_parse_date("{$news->updated}");
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}
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$item['url'] = trim($original_url);
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if (valid_url($item['url']) && !valid_url($item['url'], TRUE) && !empty($base)) {
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$item['url'] = $base . $item['url'];
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}
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// Fall back on URL if GUID is empty.
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if (!empty($guid)) {
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$item['guid'] = $guid;
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}
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else {
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$item['guid'] = $item['url'];
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}
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$item['geolocations'] = array();
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if ($lat && $lon) {
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$item['geolocations'] = array(
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array(
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'name' => $geoname,
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'lat' => $lat,
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'lon' => $lon,
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),
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);
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}
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$item['tags'] = isset($additional_taxonomies['ATOM Categories']) ? $additional_taxonomies['ATOM Categories'] : array();
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$item['domains'] = isset($additional_taxonomies['ATOM Domains']) ? $additional_taxonomies['ATOM Domains'] : array();
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$parsed_source['items'][] = $item;
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}
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return $parsed_source;
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}
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/**
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* Parse RDF Site Summary (RSS) 1.0 feeds in RDF/XML format.
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*
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* @see http://web.resource.org/rss/1.0/
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*/
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function _parser_common_syndication_RDF10_parse($feed_XML) {
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// Declare some canonical standard prefixes for well-known namespaces:
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static $canonical_namespaces = array(
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'rdf' => 'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
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'rdfs' => 'http://www.w3.org/2000/01/rdf-schema#',
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'xsi' => 'http://www.w3.org/2001/XMLSchema-instance#',
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'xsd' => 'http://www.w3.org/2001/XMLSchema#',
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'owl' => 'http://www.w3.org/2002/07/owl#',
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'dc' => 'http://purl.org/dc/elements/1.1/',
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'dcterms' => 'http://purl.org/dc/terms/',
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'dcmitype' => 'http://purl.org/dc/dcmitype/',
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'foaf' => 'http://xmlns.com/foaf/0.1/',
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'rss' => 'http://purl.org/rss/1.0/',
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);
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// Get all namespaces declared in the feed element, with special handling
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// for PHP versions prior to 5.1.2 as they don't handle namespaces.
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$namespaces = version_compare(phpversion(), '5.1.2', '<') ? array() : $feed_XML->getNamespaces(TRUE);
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// Process the <rss:channel> resource containing feed metadata:
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foreach ($feed_XML->children($canonical_namespaces['rss'])->channel as $rss_channel) {
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$parsed_source = array(
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'title' => _parser_common_syndication_title((string) $rss_channel->title),
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'description' => (string) $rss_channel->description,
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'link' => (string) $rss_channel->link,
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'items' => array(),
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);
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break;
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}
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// Process each <rss:item> resource contained in the feed:
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foreach ($feed_XML->children($canonical_namespaces['rss'])->item as $rss_item) {
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// Extract all available RDF statements from the feed item's RDF/XML
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// tags, allowing for both the item's attributes and child elements to
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// contain RDF properties:
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$rdf_data = array();
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foreach ($namespaces as $ns => $ns_uri) {
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// Note that we attempt to normalize the found property name
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// namespaces to well-known 'standard' prefixes where possible, as the
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// feed may in principle use any arbitrary prefixes and we should
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// still be able to correctly handle it.
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foreach ($rss_item->attributes($ns_uri) as $attr_name => $attr_value) {
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$ns_prefix = ($ns_prefix = array_search($ns_uri, $canonical_namespaces)) ? $ns_prefix : $ns;
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$rdf_data[$ns_prefix . ':' . $attr_name][] = (string) $attr_value;
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}
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foreach ($rss_item->children($ns_uri) as $rss_property) {
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$ns_prefix = ($ns_prefix = array_search($ns_uri, $canonical_namespaces)) ? $ns_prefix : $ns;
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$rdf_data[$ns_prefix . ':' . $rss_property->getName()][] = (string) $rss_property;
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}
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}
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// Declaratively define mappings that determine how to construct the result object.
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$item = _parser_common_syndication_RDF10_item($rdf_data, array(
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'title' => array('rss:title', 'dc:title'),
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'description' => array('rss:description', 'dc:description', 'content:encoded'),
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'url' => array('rss:link', 'rdf:about'),
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'author_name' => array('dc:creator', 'dc:publisher'),
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'guid' => 'rdf:about',
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'timestamp' => 'dc:date',
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'tags' => 'dc:subject'
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));
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// Special handling for the title:
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$item['title'] = _parser_common_syndication_title($item['title'], $item['description']);
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// Parse any date/time values into Unix timestamps:
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$item['timestamp'] = _parser_common_syndication_parse_date($item['timestamp']);
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// If no GUID found, use the URL of the feed.
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if (empty($item['guid'])) {
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$item['guid'] = $item['url'];
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}
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// Add every found RDF property to the feed item.
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$item['rdf'] = array();
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foreach ($rdf_data as $rdf_property => $rdf_value) {
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// looks nicer in the mapper UI
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// @todo Revisit, not used with feedapi mapper anymore.
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$rdf_property = str_replace(':', '_', $rdf_property);
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$item['rdf'][$rdf_property] = $rdf_value;
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}
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$parsed_source['items'][] = $item;
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}
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return $parsed_source;
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}
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function _parser_common_syndication_RDF10_property($rdf_data, $rdf_properties = array()) {
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$rdf_properties = is_array($rdf_properties) ? $rdf_properties : array_slice(func_get_args(), 1);
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foreach ($rdf_properties as $rdf_property) {
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if ($rdf_property && !empty($rdf_data[$rdf_property])) {
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// remove empty strings
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return array_filter($rdf_data[$rdf_property], 'strlen');
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}
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}
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}
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function _parser_common_syndication_RDF10_item($rdf_data, $mappings) {
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foreach ($mappings as $k => $v) {
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$values = _parser_common_syndication_RDF10_property($rdf_data, $v);
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$mappings[$k] = !is_array($values) || count($values) > 1 ? $values : reset($values);
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}
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return $mappings;
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}
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/**
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* Parse RSS2.0 feeds.
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*/
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function _parser_common_syndication_RSS20_parse($feed_XML) {
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$ns = array(
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"content" => "http://purl.org/rss/1.0/modules/content/",
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"dc" => "http://purl.org/dc/elements/1.1/",
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"georss" => "http://www.georss.org/georss",
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);
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$parsed_source = array();
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// Detect the title.
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$parsed_source['title'] = isset($feed_XML->channel->title) ? _parser_common_syndication_title("{$feed_XML->channel->title}") : "";
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// Detect the description.
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$parsed_source['description'] = isset($feed_XML->channel->description) ? "{$feed_XML->channel->description}" : "";
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// Detect the link.
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$parsed_source['link'] = isset($feed_XML->channel->link) ? "{$feed_XML->channel->link}" : "";
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$parsed_source['items'] = array();
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foreach ($feed_XML->xpath('//item') as $news) {
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$title = $body = $original_author = $original_url = $guid = '';
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$category = $news->xpath('category');
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// Get children for current namespace.
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if (version_compare(phpversion(), '5.1.2', '>')) {
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$content = (array)$news->children($ns["content"]);
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$dc = (array)$news->children($ns["dc"]);
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$georss = (array)$news->children($ns["georss"]);
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}
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$news = (array) $news;
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$news['category'] = $category;
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if (isset($news['title'])) {
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$title = "{$news['title']}";
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}
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if (isset($news['description'])) {
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$body = "{$news['description']}";
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}
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// Some sources use content:encoded as description i.e.
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// PostNuke PageSetter module.
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if (isset($news['encoded'])) { // content:encoded for PHP < 5.1.2.
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if (strlen($body) < strlen("{$news['encoded']}")) {
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$body = "{$news['encoded']}";
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}
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}
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if (isset($content['encoded'])) { // content:encoded for PHP >= 5.1.2.
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if (strlen($body) < strlen("{$content['encoded']}")) {
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$body = "{$content['encoded']}";
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}
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}
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if (!isset($body)) {
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$body = "{$news['title']}";
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}
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if (!empty($news['author'])) {
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$original_author = "{$news['author']}";
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}
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elseif (!empty($dc["creator"])) {
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$original_author = (string)$dc["creator"];
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}
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if (!empty($news['link'])) {
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$original_url = "{$news['link']}";
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$guid = $original_url;
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}
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if (!empty($news['guid'])) {
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$guid = "{$news['guid']}";
|
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}
|
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|
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if (!empty($georss['featureName'])) {
|
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$geoname = "{$georss['featureName']}";
|
||||
}
|
||||
|
||||
$lat =
|
||||
$lon =
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||||
$latlon =
|
||||
$geoname = NULL;
|
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if (!empty($georss['point'])) {
|
||||
$latlon = explode(' ', $georss['point']);
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$lat = "{$latlon[0]}";
|
||||
$lon = "{$latlon[1]}";
|
||||
if (!$geoname) {
|
||||
$geoname = "$lat $lon";
|
||||
}
|
||||
}
|
||||
|
||||
$additional_taxonomies = array();
|
||||
$additional_taxonomies['RSS Categories'] = array();
|
||||
$additional_taxonomies['RSS Domains'] = array();
|
||||
if (isset($news['category'])) {
|
||||
foreach ($news['category'] as $category) {
|
||||
$additional_taxonomies['RSS Categories'][] = "{$category}";
|
||||
if (isset($category['domain'])) {
|
||||
$domain = "{$category['domain']}";
|
||||
if (!empty($domain)) {
|
||||
if (!isset($additional_taxonomies['RSS Domains'][$domain])) {
|
||||
$additional_taxonomies['RSS Domains'][$domain] = array();
|
||||
}
|
||||
$additional_taxonomies['RSS Domains'][$domain][] = count($additional_taxonomies['RSS Categories']) - 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
$item = array();
|
||||
$item['title'] = _parser_common_syndication_title($title, $body);
|
||||
$item['description'] = $body;
|
||||
$item['author_name'] = $original_author;
|
||||
if (!empty($news['pubDate'])) {
|
||||
$item['timestamp'] = _parser_common_syndication_parse_date($news['pubDate']);
|
||||
}
|
||||
elseif (!empty($dc['date'])) {
|
||||
$item['timestamp'] = _parser_common_syndication_parse_date($dc['date']);
|
||||
}
|
||||
else {
|
||||
$item['timestamp'] = time();
|
||||
}
|
||||
$item['url'] = trim($original_url);
|
||||
$item['guid'] = $guid;
|
||||
|
||||
$item['geolocations'] = array();
|
||||
if (isset($geoname, $lat, $lon)) {
|
||||
$item['geolocations'] = array(
|
||||
array(
|
||||
'name' => $geoname,
|
||||
'lat' => $lat,
|
||||
'lon' => $lon,
|
||||
),
|
||||
);
|
||||
}
|
||||
|
||||
$item['domains'] = $additional_taxonomies['RSS Domains'];
|
||||
$item['tags'] = $additional_taxonomies['RSS Categories'];
|
||||
$parsed_source['items'][] = $item;
|
||||
}
|
||||
return $parsed_source;
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse a date comes from a feed.
|
||||
*
|
||||
* @param $date_string
|
||||
* The date string in various formats.
|
||||
* @return
|
||||
* The timestamp of the string or the current time if can't be parsed
|
||||
*/
|
||||
function _parser_common_syndication_parse_date($date_str) {
|
||||
// PHP < 5.3 doesn't like the GMT- notation for parsing timezones.
|
||||
$date_str = str_replace("GMT-", "-", $date_str);
|
||||
$date_str = str_replace("GMT+", "+", $date_str);
|
||||
$parsed_date = strtotime($date_str);
|
||||
if ($parsed_date === FALSE || $parsed_date == -1) {
|
||||
$parsed_date = _parser_common_syndication_parse_w3cdtf($date_str);
|
||||
}
|
||||
return $parsed_date === FALSE ? time() : $parsed_date;
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse the W3C date/time format, a subset of ISO 8601.
|
||||
*
|
||||
* PHP date parsing functions do not handle this format.
|
||||
* See http://www.w3.org/TR/NOTE-datetime for more information.
|
||||
* Originally from MagpieRSS (http://magpierss.sourceforge.net/).
|
||||
*
|
||||
* @param $date_str
|
||||
* A string with a potentially W3C DTF date.
|
||||
* @return
|
||||
* A timestamp if parsed successfully or FALSE if not.
|
||||
*/
|
||||
function _parser_common_syndication_parse_w3cdtf($date_str) {
|
||||
if (preg_match('/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/', $date_str, $match)) {
|
||||
list($year, $month, $day, $hours, $minutes, $seconds) = array($match[1], $match[2], $match[3], $match[4], $match[5], $match[6]);
|
||||
// Calculate the epoch for current date assuming GMT.
|
||||
$epoch = gmmktime($hours, $minutes, $seconds, $month, $day, $year);
|
||||
if ($match[10] != 'Z') { // Z is zulu time, aka GMT
|
||||
list($tz_mod, $tz_hour, $tz_min) = array($match[8], $match[9], $match[10]);
|
||||
// Zero out the variables.
|
||||
if (!$tz_hour) {
|
||||
$tz_hour = 0;
|
||||
}
|
||||
if (!$tz_min) {
|
||||
$tz_min = 0;
|
||||
}
|
||||
$offset_secs = (($tz_hour * 60) + $tz_min) * 60;
|
||||
// Is timezone ahead of GMT? If yes, subtract offset.
|
||||
if ($tz_mod == '+') {
|
||||
$offset_secs *= -1;
|
||||
}
|
||||
$epoch += $offset_secs;
|
||||
}
|
||||
return $epoch;
|
||||
}
|
||||
else {
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract the link that points to the original content (back to site or
|
||||
* original article)
|
||||
*
|
||||
* @param $links
|
||||
* Array of SimpleXML objects
|
||||
*/
|
||||
function _parser_common_syndication_link($links) {
|
||||
$to_link = '';
|
||||
if (count($links) > 0) {
|
||||
foreach ($links as $link) {
|
||||
$link = $link->attributes();
|
||||
$to_link = isset($link["href"]) ? "{$link["href"]}" : "";
|
||||
if (isset($link["rel"])) {
|
||||
if ("{$link["rel"]}" == 'alternate') {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return $to_link;
|
||||
}
|
||||
|
||||
/**
|
||||
* Prepare raw data to be a title
|
||||
*/
|
||||
function _parser_common_syndication_title($title, $body = FALSE) {
|
||||
if (empty($title) && !empty($body)) {
|
||||
// Explode to words and use the first 3 words.
|
||||
$words = preg_split('/[\s,]+/', strip_tags($body));
|
||||
$title = implode(' ', array_slice($words, 0, 3));
|
||||
}
|
||||
return $title;
|
||||
}
|
||||
Reference in New Issue
Block a user