renamed utils into something more accurated

1 files changed, 187 insertions, 0 deletions

diff --git a/utility/feedfetcher.php b/utility/feedfetcher.php
new file mode 100644
index 000000000..f33f8a82e
--- /dev/null
+++ b/utility/feedfetcher.php
@@ -0,0 +1,187 @@
+<?php
+
+/**
+* ownCloud - News
+*
+* @author Alessandro Cosentino
+* @author Bernhard Posselt
+* @copyright 2012 Alessandro Cosentino cosenal@gmail.com
+* @copyright 2012 Bernhard Posselt nukeawhale@gmail.com
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+* License as published by the Free Software Foundation; either
+* version 3 of the License, or any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+*
+* You should have received a copy of the GNU Affero General Public
+* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+namespace OCA\News\Utility;
+
+
+class FeedFetcher {
+
+
+	/**
+	 * @brief Fetch a feed from remote
+	 * @param url remote url of the feed
+	 * @returns an instance of OC_News_Feed
+	 */
+	public function fetch($url) {
+		$spfeed = new \SimplePie_Core();
+		$spfeed->set_feed_url( $url );
+		$spfeed->enable_cache( false );
+
+		if (!$spfeed->init()) {
+			return null;
+		}
+
+		//temporary try-catch to bypass SimplePie bugs
+		try {
+			$spfeed->handle_content_type();
+			$title = $spfeed->get_title();
+
+			$items = array();
+			if ($spitems = $spfeed->get_items()) {
+				foreach($spitems as $spitem) {
+					$itemUrl = $spitem->get_permalink();
+					$itemTitle = $spitem->get_title();
+					$itemGUID = $spitem->get_id();
+					$itemBody = $spitem->get_content();
+					$item = new Item($itemUrl, $itemTitle, $itemGUID, $itemBody);
+					
+					$spAuthor = $spitem->get_author();
+					if ($spAuthor !== null) {
+						$item->setAuthor($spAuthor->get_name());
+					}
+
+					//date in Item is stored in UNIX timestamp format
+					$itemDate = $spitem->get_date('U');
+					$item->setDate($itemDate);
+
+					// associated media file, for podcasts
+					$itemEnclosure = $spitem->get_enclosure();
+					if($itemEnclosure !== null) {
+						$enclosureType = $itemEnclosure->get_type();
+						$enclosureLink = $itemEnclosure->get_link();
+						if(stripos($enclosureType, "audio/") !== FALSE) {
+							$enclosure = new Enclosure();
+							$enclosure->setMimeType($enclosureType);
+							$enclosure->setLink($enclosureLink);
+							$item->setEnclosure($enclosure);
+						}
+					}
+					
+					$items[] = $item;
+				}
+			}
+
+			$feed = new Feed($url, $title, $items);
+
+			$favicon = $spfeed->get_image_url();
+
+			if ($favicon !== null && $this->checkFavicon($favicon)) { // use favicon from feed
+				$feed->setFavicon($favicon);
+			}
+			else { // try really hard to find a favicon
+				$webFavicon = $this->discoverFavicon($url);
+				if ($webFavicon !== null) {
+					$feed->setFavicon($webFavicon);
+				}
+			}
+			return $feed;
+		}
+	  catch (Exception $e) {
+			return null;
+	  }
+	}
+
+	/**
+	 * Perform a "slim" fetch of a feed from remote.
+	 * Differently from Utils::fetch(), it doesn't retrieve items nor a favicon
+	 *
+	 * @param url remote url of the feed
+	 * @returns an instance of OC_News_Feed
+	 */
+	public function slimFetch($url) {
+		$spfeed = new \SimplePie_Core();
+		$spfeed->set_feed_url( $url );
+		$spfeed->enable_cache( false );
+		$spfeed->set_stupidly_fast( true );
+
+		if (!$spfeed->init()) {
+			return null;
+		}
+
+	   //temporary try-catch to bypass SimplePie bugs
+	   try {
+		$title = $spfeed->get_title();
+
+		$feed = new Feed($url, $title);
+
+		return $feed;
+		}
+	   catch (Exception $e) {
+		return null;
+	   }
+	}
+
+	public function checkFavicon($favicon) {
+		if ($favicon === null || $favicon == false)
+			return false;
+
+		$file = new \SimplePie_File($favicon);
+		// size in bytes
+		$filesize = strlen($file->body);
+
+		if($file->success && $filesize > 0 && $filesize < 50000) { //bigger files are not considered favicons
+			$sniffer = new \SimplePie_Content_Type_Sniffer($file);
+			if(substr($sniffer->get_type(), 0, 6) === 'image/') {
+				$imgsize = getimagesize($favicon);
+				if ($imgsize['0'] <= 32 && $imgsize['1'] <= 32) { //bigger images are not considered favicons
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
+	public function discoverFavicon($url) {
+		//try webroot favicon
+		$favicon = \SimplePie_Misc::absolutize_url('/favicon.ico', $url);
+
+		if($this->checkFavicon($favicon))
+			return $favicon;
+
+		//try to extract favicon from web page
+		$absoluteUrl = \SimplePie_Misc::absolutize_url('/', $url);
+
+		$handle = curl_init ( );
+		curl_setopt ( $handle, CURLOPT_URL, $absoluteUrl );
+		curl_setopt ( $handle, CURLOPT_RETURNTRANSFER, 1 );
+		curl_setopt ( $handle, CURLOPT_FOLLOWLOCATION, TRUE );
+		curl_setopt ( $handle, CURLOPT_MAXREDIRS, 10 );
+
+		if ( FALSE!==($page=curl_exec($handle)) ) {
+			preg_match ( '/<[^>]*link[^>]*(rel=["\']icon["\']|rel=["\']shortcut icon["\']) .*href=["\']([^>]*)["\'].*>/iU', $page, $match );
+			if (1<sizeof($match)) {
+				// the specified uri might be an url, an absolute or a relative path
+				// we have to turn it into an url to be able to display it out of context
+				$favicon = htmlspecialchars_decode ( $match[2] );
+				// test for an url
+				if (parse_url($favicon,PHP_URL_SCHEME)) {
+					if($this->checkFavicon($favicon))
+						return $favicon;
+				}
+			}
+		}
+		return null;
+	}
+}
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