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egroupware/phpgwapi/inc/class.rssparser.inc.php
reinerj 48f840d7de move from old projct to new one
2004-05-05 12:06:13 +00:00

275 lines
8.1 KiB
PHP
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<?php
/**************************************************************************\
* eGroupWare API - rss parser *
* ------------------------------------------------------------------------ *
* This is not part of eGroupWare, but is used by eGroupWare. *
* http://www.egroupware.org/ *
* ------------------------------------------------------------------------ *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation; either version 2.1 of the License, or *
* any later version. *
\**************************************************************************/
/* $Id$ */
/*
* rssparse.php3
*
* Copyright (C) 2000 Jeremey Barrett
* j@nwow.org
* http://nwow.org
*
* Version 0.4
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* rssparse.php3 is a small PHP script for parsing RDF/RSS XML data. It has been
* tested with a number of popular web news and information sites such as
* slashdot.org, lwn.net, and freshmeat.net. This is not meant to be exhaustive
* but merely to provide the basic necessities. It will grow in capabilities
* with time, I'm sure.
*
* This is code I wrote for Nerds WithOut Wires, http://nwow.org.
*
*
* USAGE:
* In your PHP script, simply do something akin to this:
*
* include("rssparse.php3");
* $fp = fopen("file", "r");
* $rss = rssparse($fp);
*
* if (!$rss) {
* ERROR;
* }
*
* while (list(,$item) = each($rss->items)) {
* printf("Title: %s\n", $item["title"]);
* printf("Link: %s\n", $item["link"]);
* printf("Description: %s\n", $item["desc"]);
* }
*
* printf("Channel Title: %s\n", $rss->title);
* printf("Channel Description: %s\n", $rss->desc);
* printf("Channel Link: %s\n", $rss->link);
*
* printf("Image Title: %s\n", $rss->image["title"]);
* printf("Image URL: %s\n", $rss->image["url"]);
* printf("Image Description: %s\n", $rss->image["desc"]);
* printf("Image Link: %s\n", $rss->image["link"]);
*
*
* CHANGES:
* 0.4 - rssparse.php3 now supports the channel image tag and correctly supports
* RSS-style channels.
*
*
* BUGS:
* Width and height tags in image not supported, some other tags not supported
* yet.
*
*
* IMPORTANT NOTE:
* This requires PHP's XML routines. You must configure PHP with --with-xml.
*/
function _rssparse_start_elem ($parser, $elem, $attrs)
{
switch($elem)
{
case 'CHANNEL':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'channel';
$GLOBALS['_rss']->tmptitle[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmplink[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmpdesc[$GLOBALS['_rss']->depth] = '';
break;
case 'IMAGE':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'image';
$GLOBALS['_rss']->tmptitle[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmplink[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmpdesc[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmpurl[$GLOBALS['_rss']->depth] = '';
break;
case 'ITEM':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'item';
$GLOBALS['_rss']->tmptitle[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmplink[$GLOBALS['_rss']->depth] = '';
$GLOBALS['_rss']->tmpdesc[$GLOBALS['_rss']->depth] = '';
break;
case 'TITLE':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'title';
break;
case 'LINK':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'link';
break;
case 'DESCRIPTION':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'desc';
break;
case 'URL':
$GLOBALS['_rss']->depth++;
$GLOBALS['_rss']->state[$GLOBALS['_rss']->depth] = 'url';
break;
}
}
function _rssparse_end_elem ($parser, $elem)
{
switch ($elem)
{
case 'CHANNEL':
$GLOBALS['_rss']->set_channel(
$GLOBALS['_rss']->tmptitle[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmplink[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmpdesc[$GLOBALS['_rss']->depth]
);
$GLOBALS['_rss']->depth--;
break;
case 'IMAGE':
$GLOBALS['_rss']->set_image(
$GLOBALS['_rss']->tmptitle[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmplink[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmpdesc[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmpurl[$GLOBALS['_rss']->depth]
);
$GLOBALS['_rss']->depth--;
break;
case 'ITEM':
$GLOBALS['_rss']->add_item(
$GLOBALS['_rss']->tmptitle[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmplink[$GLOBALS['_rss']->depth],
$GLOBALS['_rss']->tmpdesc[$GLOBALS['_rss']->depth]
);
$GLOBALS['_rss']->depth--;
break;
case 'TITLE':
$GLOBALS['_rss']->depth--;
break;
case 'LINK':
$GLOBALS['_rss']->depth--;
break;
case 'DESCRIPTION':
$GLOBALS['_rss']->depth--;
break;
case 'URL':
$GLOBALS['_rss']->depth--;
break;
}
}
function _rssparse_elem_data ($parser, $data)
{
switch ($GLOBALS['_rss']->state[$GLOBALS['_rss']->depth])
{
case 'title':
$GLOBALS['_rss']->tmptitle[($GLOBALS['_rss']->depth - 1)] .= $data;
break;
case 'link';
$GLOBALS['_rss']->tmplink[($GLOBALS['_rss']->depth - 1)] .= $data;
break;
case 'desc':
$GLOBALS['_rss']->tmpdesc[($GLOBALS['_rss']->depth - 1)] .= $data;
break;
case 'url':
$GLOBALS['_rss']->tmpurl[($GLOBALS['_rss']->depth - 1)] .= $data;
break;
}
}
class rssparser
{
var $title;
var $link;
var $desc;
var $items = array();
var $nitems;
var $image = array();
var $state = array();
var $tmptitle = array();
var $tmplink = array();
var $tmpdesc = array();
var $tmpurl = array();
var $depth;
function rssparser()
{
$this->nitems = 0;
$this->depth = 0;
}
function set_channel($in_title, $in_link, $in_desc)
{
$this->title = $in_title;
$this->link = $in_link;
$this->desc = $in_desc;
}
function set_image($in_title, $in_link, $in_desc, $in_url)
{
$this->image['title'] = $in_title;
$this->image['link'] = $in_link;
$this->image['desc'] = $in_desc;
$this->image['url'] = $in_url;
}
function add_item($in_title, $in_link, $in_desc)
{
$this->items[$this->nitems]['title'] = $in_title;
$this->items[$this->nitems]['link'] = $in_link;
$this->items[$this->nitems]['desc'] = $in_desc;
$this->nitems++;
}
function parse($fp)
{
$xml_parser = xml_parser_create();
xml_set_element_handler($xml_parser, '_rssparse_start_elem', '_rssparse_end_elem');
xml_set_character_data_handler($xml_parser, '_rssparse_elem_data');
while ($data = fread($fp, 4096))
{
if (!xml_parse($xml_parser, $data, feof($fp)))
{
return 1;
}
}
xml_parser_free($xml_parser);
return 0;
}
}
function rssparse ($fp)
{
$GLOBALS['_rss'] = new rssparser();
if ($GLOBALS['_rss']->parse($fp))
{
return 0;
}
return $GLOBALS['_rss'];
}
?>
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