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<?php // -*-php-*-
rcs_id('$Id: RssParser.php,v 1.11 2005/04/10 10:24:58 rurban Exp $');
/**
* Simple RSSParser Class
* Based on Duncan Gough RSSParser class
* Copyleft Arnaud Fontaine
* Licence : GPL
* See lib/plugin/RssFeed.php and lib/XmlParser.php
*
* The myth of RSS compatibility:
* http://diveintomark.org/archives/2004/02/04/incompatible-rss
*/
/*
This file is part of PhpWiki.
PhpWiki is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PhpWiki 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with PhpWiki; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* 2004-04-09 16:30:50 rurban:
* added fsockopen allow_url_fopen = Off workaround
* 2004-04-12 20:04:12 rurban:
* fixes for IMAGE element (sf.net)
* 2005-04-10 11:17:35 rurban
* certain RSS dont contain <item> tags to describe the list of <items>
* http://ws.audioscrobbler.com/rdf/ for example
*/
require_once('lib/XmlParser.php');
class RSSParser
extends XmlParser {
var $title = "";
var $link = "";
var $description = "";
var $inside_item = false;
var $list_items = false;
var $item = array();
var $items;
var $channel;
var $divers = "";
var $date = "";
function tag_open($parser, $name, $attrs=''){
global $current_tag, $current_attrs;
$current_tag = $name;
$current_attrs = $attrs;
if ($name == "ITEM")
$this->inside_item = true;
elseif ($name == "ITEMS")
$this->list_items = true;
elseif ($name == "IMAGE")
$this->inside_item = true;
}
function tag_close($parser, $tagName, $attrs=''){
global $current_tag;
if ($tagName == "ITEM") {
if (empty($this->items)) {
$this->items = array();
$GLOBALS['rss_parser_items'] =& $this->items;
} elseif (!empty($this->items[0]['link']) and $this->items[0]['title'] == '') {
// override the initial <items> list with detailed <item>'s
$this->items = array();
$GLOBALS['rss_parser_items'] =& $this->items;
}
$this->items[] = array("title" => $this->item['TITLE'],
"description" => @$this->item['DESCRIPTION'],
"link" => $this->item['LINK']);
$this->item = array("TITLE" => "",
"DESCRIPTION" => "",
"LINK" => "");
$this->inside_item = false;
} elseif ($tagName == "IMAGE") {
$this->item = array("TITLE" => "",
"DESCRIPTION" => "",
"LINK" => "");
$this->inside_item = false;
} elseif ($tagName == "CHANNEL") {
$this->channel = array("title" => $this->title,
"description" => $this->description,
"link" => $this->link,
"date" => $this->date,
"divers" => $this->divers);
$GLOBALS['rss_parser_channel'] =& $this->channel;
$this->title = "";
$this->description = "";
$this->link = "";
$this->divers = "";
$this->date = "";
} elseif ($tagName == "ITEMS") {
$GLOBALS['rss_parser_items'] =& $this->items;
$this->item = array("TITLE" => "",
"DESCRIPTION" => "",
"LINK" => "");
$this->list_items = false;
}
}
function cdata($parser, $data){
global $current_tag, $current_attrs;
if ($this->inside_item) {
if (empty($this->item[$current_tag]))
$this->item[$current_tag] = '';
if ($current_tag == 'LINK') {
if (trim($data))
$this->item[$current_tag] = trim($data);
} else {
$this->item[$current_tag] .= trim($data);
}
} elseif ($this->list_items) {
if ($current_tag == 'RDF:LI') {
// FIXME: avoid duplicates. cdata called back 4x per RDF:LI
if ($this->items[count($this->items)-1]['link'] != @$current_attrs['RDF:RESOURCE'])
$this->items[] = array('link' => @$current_attrs['RDF:RESOURCE'],
'title' => '');
}
} else {
switch ($current_tag) {
case "TITLE":
if (trim($data))
$this->title .= " " . trim($data);
break;
case "DESCRIPTION":
if (trim($data))
$this->description .= trim($data);
break;
case "LINK":
if (trim($data))
$this->link = trim($data);
break;
case "DC:DATE":
if (trim($data))
$this->date .= " " . trim($data);
default:
if (trim($data))
$this->divers .= " " . $current_tag."/".$data;
break;
}
}
}
function parse($content, $is_final = true) {
xml_parse($this->_parser, $content, $is_final) or
trigger_error(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($this->_parser)),
xml_get_current_line_number($this->_parser)),
E_USER_WARNING);
//OO workaround: parser object looses its params. we have to store them in globals
if ($is_final) {
if (empty($this->items)) {
$this->items = @$GLOBALS['rss_parser_items'];
$this->channel = @$GLOBALS['rss_parser_channel'];
}
unset($GLOBALS['rss_parser_items']);
unset($GLOBALS['rss_parser_channel']);
}
}
}
// $Log: RssParser.php,v $
// Revision 1.11 2005/04/10 10:24:58 rurban
// fix for RSS feeds without detailled <item> tags:
// just list the <items> urls then (Bug #1180027)
//
// Revision 1.10 2005/01/22 11:45:09 rurban
// docs
//
// Revision 1.9 2004/06/08 21:12:02 rurban
// is_final fix for incremental parsing
//
// Revision 1.8 2004/06/08 21:03:20 rurban
// updated RssParser for XmlParser quirks (store parser object params in globals)
//
// Revision 1.7 2004/05/24 17:31:31 rurban
// new XmlParser and HtmlParser, RssParser based on that.
//
// Revision 1.6 2004/05/18 16:18:36 rurban
// AutoSplit at subpage seperators
// RssFeed stability fix for empty feeds or broken connections
//
// Revision 1.5 2004/04/26 20:44:34 rurban
// locking table specific for better databases
//
// Revision 1.4 2004/04/18 01:11:51 rurban
// more numeric pagename fixes.
// fixed action=upload with merge conflict warnings.
// charset changed from constant to global (dynamic utf-8 switching)
//
// For emacs users
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>
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