--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/aggregator/aggregator.parser.inc Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,329 @@
+<?php
+
+/**
+ * @file
+ * Parser functions for the aggregator module.
+ */
+
+/**
+ * Implements hook_aggregator_parse_info().
+ */
+function aggregator_aggregator_parse_info() {
+ return array(
+ 'title' => t('Default parser'),
+ 'description' => t('Parses RSS, Atom and RDF feeds.'),
+ );
+}
+
+/**
+ * Implements hook_aggregator_parse().
+ */
+function aggregator_aggregator_parse($feed) {
+ global $channel, $image;
+
+ // Filter the input data.
+ if (aggregator_parse_feed($feed->source_string, $feed)) {
+ $modified = empty($feed->http_headers['last-modified']) ? 0 : strtotime($feed->http_headers['last-modified']);
+
+ // Prepare the channel data.
+ foreach ($channel as $key => $value) {
+ $channel[$key] = trim($value);
+ }
+
+ // Prepare the image data (if any).
+ foreach ($image as $key => $value) {
+ $image[$key] = trim($value);
+ }
+
+ $etag = empty($feed->http_headers['etag']) ? '' : $feed->http_headers['etag'];
+
+ // Add parsed data to the feed object.
+ $feed->link = !empty($channel['link']) ? $channel['link'] : '';
+ $feed->description = !empty($channel['description']) ? $channel['description'] : '';
+ $feed->image = !empty($image['url']) ? $image['url'] : '';
+ $feed->etag = $etag;
+ $feed->modified = $modified;
+
+ // Clear the cache.
+ cache_clear_all();
+
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/**
+ * Parses a feed and stores its items.
+ *
+ * @param $data
+ * The feed data.
+ * @param $feed
+ * An object describing the feed to be parsed.
+ *
+ * @return
+ * FALSE on error, TRUE otherwise.
+ */
+function aggregator_parse_feed(&$data, $feed) {
+ global $items, $image, $channel;
+
+ // Unset the global variables before we use them.
+ unset($GLOBALS['element'], $GLOBALS['item'], $GLOBALS['tag']);
+ $items = array();
+ $image = array();
+ $channel = array();
+
+ // Parse the data.
+ $xml_parser = drupal_xml_parser_create($data);
+ xml_set_element_handler($xml_parser, 'aggregator_element_start', 'aggregator_element_end');
+ xml_set_character_data_handler($xml_parser, 'aggregator_element_data');
+
+ if (!xml_parse($xml_parser, $data, 1)) {
+ watchdog('aggregator', 'The feed from %site seems to be broken, due to an error "%error" on line %line.', array('%site' => $feed->title, '%error' => xml_error_string(xml_get_error_code($xml_parser)), '%line' => xml_get_current_line_number($xml_parser)), WATCHDOG_WARNING);
+ drupal_set_message(t('The feed from %site seems to be broken, because of error "%error" on line %line.', array('%site' => $feed->title, '%error' => xml_error_string(xml_get_error_code($xml_parser)), '%line' => xml_get_current_line_number($xml_parser))), 'error');
+ return FALSE;
+ }
+ xml_parser_free($xml_parser);
+
+ // We reverse the array such that we store the first item last, and the last
+ // item first. In the database, the newest item should be at the top.
+ $items = array_reverse($items);
+
+ // Initialize items array.
+ $feed->items = array();
+ foreach ($items as $item) {
+
+ // Prepare the item:
+ foreach ($item as $key => $value) {
+ $item[$key] = trim($value);
+ }
+
+ // Resolve the item's title. If no title is found, we use up to 40
+ // characters of the description ending at a word boundary, but not
+ // splitting potential entities.
+ if (!empty($item['title'])) {
+ $item['title'] = $item['title'];
+ }
+ elseif (!empty($item['description'])) {
+ $item['title'] = preg_replace('/^(.*)[^\w;&].*?$/', "\\1", truncate_utf8($item['description'], 40));
+ }
+ else {
+ $item['title'] = '';
+ }
+
+ // Resolve the items link.
+ if (!empty($item['link'])) {
+ $item['link'] = $item['link'];
+ }
+ else {
+ $item['link'] = $feed->link;
+ }
+
+ // Atom feeds have an ID tag instead of a GUID tag.
+ if (!isset($item['guid'])) {
+ $item['guid'] = isset($item['id']) ? $item['id'] : '';
+ }
+
+ // Atom feeds have a content and/or summary tag instead of a description tag.
+ if (!empty($item['content:encoded'])) {
+ $item['description'] = $item['content:encoded'];
+ }
+ elseif (!empty($item['summary'])) {
+ $item['description'] = $item['summary'];
+ }
+ elseif (!empty($item['content'])) {
+ $item['description'] = $item['content'];
+ }
+
+ // Try to resolve and parse the item's publication date.
+ $date = '';
+ foreach (array('pubdate', 'dc:date', 'dcterms:issued', 'dcterms:created', 'dcterms:modified', 'issued', 'created', 'modified', 'published', 'updated') as $key) {
+ if (!empty($item[$key])) {
+ $date = $item[$key];
+ break;
+ }
+ }
+
+ $item['timestamp'] = strtotime($date);
+
+ if ($item['timestamp'] === FALSE) {
+ $item['timestamp'] = aggregator_parse_w3cdtf($date); // Aggregator_parse_w3cdtf() returns FALSE on failure.
+ }
+
+ // Resolve dc:creator tag as the item author if author tag is not set.
+ if (empty($item['author']) && !empty($item['dc:creator'])) {
+ $item['author'] = $item['dc:creator'];
+ }
+
+ $item += array('author' => '', 'description' => '');
+
+ // Store on $feed object. This is where processors will look for parsed items.
+ $feed->items[] = $item;
+ }
+
+ return TRUE;
+}
+
+/**
+ * Performs an action when an opening tag is encountered.
+ *
+ * Callback function used by xml_parse() within aggregator_parse_feed().
+ */
+function aggregator_element_start($parser, $name, $attributes) {
+ global $item, $element, $tag, $items, $channel;
+
+ $name = strtolower($name);
+ switch ($name) {
+ case 'image':
+ case 'textinput':
+ case 'summary':
+ case 'tagline':
+ case 'subtitle':
+ case 'logo':
+ case 'info':
+ $element = $name;
+ break;
+ case 'id':
+ case 'content':
+ if ($element != 'item') {
+ $element = $name;
+ }
+ case 'link':
+ // According to RFC 4287, link elements in Atom feeds without a 'rel'
+ // attribute should be interpreted as though the relation type is
+ // "alternate".
+ if (!empty($attributes['HREF']) && (empty($attributes['REL']) || $attributes['REL'] == 'alternate')) {
+ if ($element == 'item') {
+ $items[$item]['link'] = $attributes['HREF'];
+ }
+ else {
+ $channel['link'] = $attributes['HREF'];
+ }
+ }
+ break;
+ case 'item':
+ $element = $name;
+ $item += 1;
+ break;
+ case 'entry':
+ $element = 'item';
+ $item += 1;
+ break;
+ }
+
+ $tag = $name;
+}
+
+/**
+ * Performs an action when a closing tag is encountered.
+ *
+ * Callback function used by xml_parse() within aggregator_parse_feed().
+ */
+function aggregator_element_end($parser, $name) {
+ global $element;
+
+ switch ($name) {
+ case 'image':
+ case 'textinput':
+ case 'item':
+ case 'entry':
+ case 'info':
+ $element = '';
+ break;
+ case 'id':
+ case 'content':
+ if ($element == $name) {
+ $element = '';
+ }
+ }
+}
+
+/**
+ * Performs an action when data is encountered.
+ *
+ * Callback function used by xml_parse() within aggregator_parse_feed().
+ */
+function aggregator_element_data($parser, $data) {
+ global $channel, $element, $items, $item, $image, $tag;
+ $items += array($item => array());
+ switch ($element) {
+ case 'item':
+ $items[$item] += array($tag => '');
+ $items[$item][$tag] .= $data;
+ break;
+ case 'image':
+ case 'logo':
+ $image += array($tag => '');
+ $image[$tag] .= $data;
+ break;
+ case 'link':
+ if ($data) {
+ $items[$item] += array($tag => '');
+ $items[$item][$tag] .= $data;
+ }
+ break;
+ case 'content':
+ $items[$item] += array('content' => '');
+ $items[$item]['content'] .= $data;
+ break;
+ case 'summary':
+ $items[$item] += array('summary' => '');
+ $items[$item]['summary'] .= $data;
+ break;
+ case 'tagline':
+ case 'subtitle':
+ $channel += array('description' => '');
+ $channel['description'] .= $data;
+ break;
+ case 'info':
+ case 'id':
+ case 'textinput':
+ // The sub-element is not supported. However, we must recognize
+ // it or its contents will end up in the item array.
+ break;
+ default:
+ $channel += array($tag => '');
+ $channel[$tag] .= $data;
+ }
+}
+
+/**
+ * Parses 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 $date_str
+ * A string with a potentially W3C DTF date.
+ *
+ * @return
+ * A timestamp if parsed successfully or FALSE if not.
+ */
+function aggregator_parse_w3cdtf($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;
+ }
+}