dc09453a77
* renamed FeedSub plugin to OStatus * now setting avatar on subscriptions * general fixes for subscription * integrated PuSH hub to handle only user timelines on canonical ID url; sends updates directly * set $config['feedsub']['nohub'] = true to test w/ foreign feeds that don't have hubs (won't actually receive updates though) * a few bits of code documentation * HMAC support for verified distributions (safest if sub setup is on HTTPS) And a couple core changes: * minimizing HTML output for exceptions in API requests to aid in debugging * fix for rel=self link in apitimelineuser when id given This does not not yet include any of the individual subscription management (Salmon notifications for sub/unsub, etc) nor a nice UI for user subscriptions. Needs some further cleanup to treat posts as status updates instead of link references.
335 lines
11 KiB
PHP
335 lines
11 KiB
PHP
<?php
|
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
|
|
|
/**
|
|
* Class representing feed-level data for an RSS2 feed
|
|
*
|
|
* PHP versions 5
|
|
*
|
|
* LICENSE: This source file is subject to version 3.0 of the PHP license
|
|
* that is available through the world-wide-web at the following URI:
|
|
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
|
|
* the PHP License and are unable to obtain it through the web, please
|
|
* send a note to license@php.net so we can mail you a copy immediately.
|
|
*
|
|
* @category XML
|
|
* @package XML_Feed_Parser
|
|
* @author James Stewart <james@jystewart.net>
|
|
* @copyright 2005 James Stewart <james@jystewart.net>
|
|
* @license http://www.gnu.org/copyleft/lesser.html GNU LGPL 2.1
|
|
* @version CVS: $Id: RSS2.php,v 1.12 2008/03/08 18:16:45 jystewart Exp $
|
|
* @link http://pear.php.net/package/XML_Feed_Parser/
|
|
*/
|
|
|
|
/**
|
|
* This class handles RSS2 feeds.
|
|
*
|
|
* @author James Stewart <james@jystewart.net>
|
|
* @version Release: 1.0.3
|
|
* @package XML_Feed_Parser
|
|
*/
|
|
class XML_Feed_Parser_RSS2 extends XML_Feed_Parser_Type
|
|
{
|
|
/**
|
|
* The URI of the RelaxNG schema used to (optionally) validate the feed
|
|
* @var string
|
|
*/
|
|
private $relax = 'rss20.rnc';
|
|
|
|
/**
|
|
* We're likely to use XPath, so let's keep it global
|
|
* @var DOMXPath
|
|
*/
|
|
protected $xpath;
|
|
|
|
/**
|
|
* The feed type we are parsing
|
|
* @var string
|
|
*/
|
|
public $version = 'RSS 2.0';
|
|
|
|
/**
|
|
* The class used to represent individual items
|
|
* @var string
|
|
*/
|
|
protected $itemClass = 'XML_Feed_Parser_RSS2Element';
|
|
|
|
/**
|
|
* The element containing entries
|
|
* @var string
|
|
*/
|
|
protected $itemElement = 'item';
|
|
|
|
/**
|
|
* Here we map those elements we're not going to handle individually
|
|
* to the constructs they are. The optional second parameter in the array
|
|
* tells the parser whether to 'fall back' (not apt. at the feed level) or
|
|
* fail if the element is missing. If the parameter is not set, the function
|
|
* will simply return false and leave it to the client to decide what to do.
|
|
* @var array
|
|
*/
|
|
protected $map = array(
|
|
'ttl' => array('Text'),
|
|
'pubDate' => array('Date'),
|
|
'lastBuildDate' => array('Date'),
|
|
'title' => array('Text'),
|
|
'link' => array('Link'),
|
|
'description' => array('Text'),
|
|
'language' => array('Text'),
|
|
'copyright' => array('Text'),
|
|
'managingEditor' => array('Text'),
|
|
'webMaster' => array('Text'),
|
|
'category' => array('Text'),
|
|
'generator' => array('Text'),
|
|
'docs' => array('Text'),
|
|
'ttl' => array('Text'),
|
|
'image' => array('Image'),
|
|
'skipDays' => array('skipDays'),
|
|
'skipHours' => array('skipHours'));
|
|
|
|
/**
|
|
* Here we map some elements to their atom equivalents. This is going to be
|
|
* quite tricky to pull off effectively (and some users' methods may vary)
|
|
* but is worth trying. The key is the atom version, the value is RSS2.
|
|
* @var array
|
|
*/
|
|
protected $compatMap = array(
|
|
'title' => array('title'),
|
|
'rights' => array('copyright'),
|
|
'updated' => array('lastBuildDate'),
|
|
'subtitle' => array('description'),
|
|
'date' => array('pubDate'),
|
|
'author' => array('managingEditor'));
|
|
|
|
protected $namespaces = array(
|
|
'dc' => 'http://purl.org/rss/1.0/modules/dc/',
|
|
'content' => 'http://purl.org/rss/1.0/modules/content/');
|
|
|
|
/**
|
|
* Our constructor does nothing more than its parent.
|
|
*
|
|
* @param DOMDocument $xml A DOM object representing the feed
|
|
* @param bool (optional) $string Whether or not to validate this feed
|
|
*/
|
|
function __construct(DOMDocument $model, $strict = false)
|
|
{
|
|
$this->model = $model;
|
|
|
|
if ($strict) {
|
|
if (! $this->model->relaxNGValidate($this->relax)) {
|
|
throw new XML_Feed_Parser_Exception('Failed required validation');
|
|
}
|
|
}
|
|
|
|
$this->xpath = new DOMXPath($this->model);
|
|
foreach ($this->namespaces as $key => $value) {
|
|
$this->xpath->registerNamespace($key, $value);
|
|
}
|
|
$this->numberEntries = $this->count('item');
|
|
}
|
|
|
|
/**
|
|
* Retrieves an entry by ID, if the ID is specified with the guid element
|
|
*
|
|
* This is not really something that will work with RSS2 as it does not have
|
|
* clear restrictions on the global uniqueness of IDs. But we can emulate
|
|
* it by allowing access based on the 'guid' element. If DOMXPath::evaluate
|
|
* is available, we also use that to store a reference to the entry in the array
|
|
* used by getEntryByOffset so that method does not have to seek out the entry
|
|
* if it's requested that way.
|
|
*
|
|
* @param string $id any valid ID.
|
|
* @return XML_Feed_Parser_RSS2Element
|
|
*/
|
|
function getEntryById($id)
|
|
{
|
|
if (isset($this->idMappings[$id])) {
|
|
return $this->entries[$this->idMappings[$id]];
|
|
}
|
|
|
|
$entries = $this->xpath->query("//item[guid='$id']");
|
|
if ($entries->length > 0) {
|
|
$entry = new $this->itemElement($entries->item(0), $this);
|
|
if (in_array('evaluate', get_class_methods($this->xpath))) {
|
|
$offset = $this->xpath->evaluate("count(preceding-sibling::item)", $entries->item(0));
|
|
$this->entries[$offset] = $entry;
|
|
}
|
|
$this->idMappings[$id] = $entry;
|
|
return $entry;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a category from the element
|
|
*
|
|
* The category element is a simple text construct which can occur any number
|
|
* of times. We allow access by offset or access to an array of results.
|
|
*
|
|
* @param string $call for compatibility with our overloading
|
|
* @param array $arguments - arg 0 is the offset, arg 1 is whether to return as array
|
|
* @return string|array|false
|
|
*/
|
|
function getCategory($call, $arguments = array())
|
|
{
|
|
$categories = $this->model->getElementsByTagName('category');
|
|
$offset = empty($arguments[0]) ? 0 : $arguments[0];
|
|
$array = empty($arguments[1]) ? false : true;
|
|
if ($categories->length <= $offset) {
|
|
return false;
|
|
}
|
|
if ($array) {
|
|
$list = array();
|
|
foreach ($categories as $category) {
|
|
array_push($list, $category->nodeValue);
|
|
}
|
|
return $list;
|
|
}
|
|
return $categories->item($offset)->nodeValue;
|
|
}
|
|
|
|
/**
|
|
* Get details of the image associated with the feed.
|
|
*
|
|
* @return array|false an array simply containing the child elements
|
|
*/
|
|
protected function getImage()
|
|
{
|
|
$images = $this->xpath->query("//image");
|
|
if ($images->length > 0) {
|
|
$image = $images->item(0);
|
|
$desc = $image->getElementsByTagName('description');
|
|
$description = $desc->length ? $desc->item(0)->nodeValue : false;
|
|
$heigh = $image->getElementsByTagName('height');
|
|
$height = $heigh->length ? $heigh->item(0)->nodeValue : false;
|
|
$widt = $image->getElementsByTagName('width');
|
|
$width = $widt->length ? $widt->item(0)->nodeValue : false;
|
|
return array(
|
|
'title' => $image->getElementsByTagName('title')->item(0)->nodeValue,
|
|
'link' => $image->getElementsByTagName('link')->item(0)->nodeValue,
|
|
'url' => $image->getElementsByTagName('url')->item(0)->nodeValue,
|
|
'description' => $description,
|
|
'height' => $height,
|
|
'width' => $width);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* The textinput element is little used, but in the interests of
|
|
* completeness...
|
|
*
|
|
* @return array|false
|
|
*/
|
|
function getTextInput()
|
|
{
|
|
$inputs = $this->model->getElementsByTagName('input');
|
|
if ($inputs->length > 0) {
|
|
$input = $inputs->item(0);
|
|
return array(
|
|
'title' => $input->getElementsByTagName('title')->item(0)->value,
|
|
'description' =>
|
|
$input->getElementsByTagName('description')->item(0)->value,
|
|
'name' => $input->getElementsByTagName('name')->item(0)->value,
|
|
'link' => $input->getElementsByTagName('link')->item(0)->value);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Utility function for getSkipDays and getSkipHours
|
|
*
|
|
* This is a general function used by both getSkipDays and getSkipHours. It simply
|
|
* returns an array of the values of the children of the appropriate tag.
|
|
*
|
|
* @param string $tagName The tag name (getSkipDays or getSkipHours)
|
|
* @return array|false
|
|
*/
|
|
protected function getSkips($tagName)
|
|
{
|
|
$hours = $this->model->getElementsByTagName($tagName);
|
|
if ($hours->length == 0) {
|
|
return false;
|
|
}
|
|
$skipHours = array();
|
|
foreach($hours->item(0)->childNodes as $hour) {
|
|
if ($hour instanceof DOMElement) {
|
|
array_push($skipHours, $hour->nodeValue);
|
|
}
|
|
}
|
|
return $skipHours;
|
|
}
|
|
|
|
/**
|
|
* Retrieve skipHours data
|
|
*
|
|
* The skiphours element provides a list of hours on which this feed should
|
|
* not be checked. We return an array of those hours (integers, 24 hour clock)
|
|
*
|
|
* @return array
|
|
*/
|
|
function getSkipHours()
|
|
{
|
|
return $this->getSkips('skipHours');
|
|
}
|
|
|
|
/**
|
|
* Retrieve skipDays data
|
|
*
|
|
* The skipdays element provides a list of days on which this feed should
|
|
* not be checked. We return an array of those days.
|
|
*
|
|
* @return array
|
|
*/
|
|
function getSkipDays()
|
|
{
|
|
return $this->getSkips('skipDays');
|
|
}
|
|
|
|
/**
|
|
* Return content of the little-used 'cloud' element
|
|
*
|
|
* The cloud element is rarely used. It is designed to provide some details
|
|
* of a location to update the feed.
|
|
*
|
|
* @return array an array of the attributes of the element
|
|
*/
|
|
function getCloud()
|
|
{
|
|
$cloud = $this->model->getElementsByTagName('cloud');
|
|
if ($cloud->length == 0) {
|
|
return false;
|
|
}
|
|
$cloudData = array();
|
|
foreach ($cloud->item(0)->attributes as $attribute) {
|
|
$cloudData[$attribute->name] = $attribute->value;
|
|
}
|
|
return $cloudData;
|
|
}
|
|
|
|
/**
|
|
* Get link URL
|
|
*
|
|
* In RSS2 a link is a text element but in order to ensure that we resolve
|
|
* URLs properly we have a special function for them. We maintain the
|
|
* parameter used by the atom getLink method, though we only use the offset
|
|
* parameter.
|
|
*
|
|
* @param int $offset The position of the link within the feed. Starts from 0
|
|
* @param string $attribute The attribute of the link element required
|
|
* @param array $params An array of other parameters. Not used.
|
|
* @return string
|
|
*/
|
|
function getLink($offset, $attribute = 'href', $params = array())
|
|
{
|
|
$xPath = new DOMXPath($this->model);
|
|
$links = $xPath->query('//link');
|
|
|
|
if ($links->length <= $offset) {
|
|
return false;
|
|
}
|
|
$link = $links->item($offset);
|
|
return $this->addBase($link->nodeValue, $link);
|
|
}
|
|
}
|
|
|
|
?>
|