mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-06 02:41:27 +01:00
7f29687a55
git-svn-id: http://core.svn.wordpress.org/branches/4.3@33847 1a063a9b-81f0-0310-95a4-ce76da25c4cd
373 lines
11 KiB
PHP
373 lines
11 KiB
PHP
<?php
|
|
/**
|
|
* SimplePie
|
|
*
|
|
* A PHP-Based RSS and Atom Feed Framework.
|
|
* Takes the hard work out of managing a complete RSS/Atom solution.
|
|
*
|
|
* Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification, are
|
|
* permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice, this list of
|
|
* conditions and the following disclaimer.
|
|
*
|
|
* * Redistributions in binary form must reproduce the above copyright notice, this list
|
|
* of conditions and the following disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* * Neither the name of the SimplePie Team nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
|
|
* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* @package SimplePie
|
|
* @version 1.3.1
|
|
* @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
|
|
* @author Ryan Parman
|
|
* @author Geoffrey Sneddon
|
|
* @author Ryan McCue
|
|
* @link http://simplepie.org/ SimplePie
|
|
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
|
|
*/
|
|
|
|
/**
|
|
* Used for feed auto-discovery
|
|
*
|
|
*
|
|
* This class can be overloaded with {@see SimplePie::set_locator_class()}
|
|
*
|
|
* @package SimplePie
|
|
*/
|
|
class SimplePie_Locator
|
|
{
|
|
var $useragent;
|
|
var $timeout;
|
|
var $file;
|
|
var $local = array();
|
|
var $elsewhere = array();
|
|
var $cached_entities = array();
|
|
var $http_base;
|
|
var $base;
|
|
var $base_location = 0;
|
|
var $checked_feeds = 0;
|
|
var $max_checked_feeds = 10;
|
|
protected $registry;
|
|
|
|
public function __construct(SimplePie_File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10)
|
|
{
|
|
$this->file = $file;
|
|
$this->useragent = $useragent;
|
|
$this->timeout = $timeout;
|
|
$this->max_checked_feeds = $max_checked_feeds;
|
|
|
|
if (class_exists('DOMDocument'))
|
|
{
|
|
$this->dom = new DOMDocument();
|
|
|
|
set_error_handler(array('SimplePie_Misc', 'silence_errors'));
|
|
$this->dom->loadHTML($this->file->body);
|
|
restore_error_handler();
|
|
}
|
|
else
|
|
{
|
|
$this->dom = null;
|
|
}
|
|
}
|
|
|
|
public function set_registry(SimplePie_Registry $registry)
|
|
{
|
|
$this->registry = $registry;
|
|
}
|
|
|
|
public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working)
|
|
{
|
|
if ($this->is_feed($this->file))
|
|
{
|
|
return $this->file;
|
|
}
|
|
|
|
if ($this->file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)
|
|
{
|
|
$sniffer = $this->registry->create('Content_Type_Sniffer', array($this->file));
|
|
if ($sniffer->get_type() !== 'text/html')
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
if ($type & ~SIMPLEPIE_LOCATOR_NONE)
|
|
{
|
|
$this->get_base();
|
|
}
|
|
|
|
if ($type & SIMPLEPIE_LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery())
|
|
{
|
|
return $working[0];
|
|
}
|
|
|
|
if ($type & (SIMPLEPIE_LOCATOR_LOCAL_EXTENSION | SIMPLEPIE_LOCATOR_LOCAL_BODY | SIMPLEPIE_LOCATOR_REMOTE_EXTENSION | SIMPLEPIE_LOCATOR_REMOTE_BODY) && $this->get_links())
|
|
{
|
|
if ($type & SIMPLEPIE_LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local))
|
|
{
|
|
return $working;
|
|
}
|
|
|
|
if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local))
|
|
{
|
|
return $working;
|
|
}
|
|
|
|
if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere))
|
|
{
|
|
return $working;
|
|
}
|
|
|
|
if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere))
|
|
{
|
|
return $working;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public function is_feed($file)
|
|
{
|
|
if ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)
|
|
{
|
|
$sniffer = $this->registry->create('Content_Type_Sniffer', array($file));
|
|
$sniffed = $sniffer->get_type();
|
|
if (in_array($sniffed, array('application/rss+xml', 'application/rdf+xml', 'text/rdf', 'application/atom+xml', 'text/xml', 'application/xml')))
|
|
{
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
elseif ($file->method & SIMPLEPIE_FILE_SOURCE_LOCAL)
|
|
{
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public function get_base()
|
|
{
|
|
if ($this->dom === null)
|
|
{
|
|
throw new SimplePie_Exception('DOMDocument not found, unable to use locator');
|
|
}
|
|
$this->http_base = $this->file->url;
|
|
$this->base = $this->http_base;
|
|
$elements = $this->dom->getElementsByTagName('base');
|
|
foreach ($elements as $element)
|
|
{
|
|
if ($element->hasAttribute('href'))
|
|
{
|
|
$base = $this->registry->call('Misc', 'absolutize_url', array(trim($element->getAttribute('href')), $this->http_base));
|
|
if ($base === false)
|
|
{
|
|
continue;
|
|
}
|
|
$this->base = $base;
|
|
$this->base_location = method_exists($element, 'getLineNo') ? $element->getLineNo() : 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
public function autodiscovery()
|
|
{
|
|
$done = array();
|
|
$feeds = array();
|
|
$feeds = array_merge($feeds, $this->search_elements_by_tag('link', $done, $feeds));
|
|
$feeds = array_merge($feeds, $this->search_elements_by_tag('a', $done, $feeds));
|
|
$feeds = array_merge($feeds, $this->search_elements_by_tag('area', $done, $feeds));
|
|
|
|
if (!empty($feeds))
|
|
{
|
|
return array_values($feeds);
|
|
}
|
|
else
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
protected function search_elements_by_tag($name, &$done, $feeds)
|
|
{
|
|
if ($this->dom === null)
|
|
{
|
|
throw new SimplePie_Exception('DOMDocument not found, unable to use locator');
|
|
}
|
|
|
|
$links = $this->dom->getElementsByTagName($name);
|
|
foreach ($links as $link)
|
|
{
|
|
if ($this->checked_feeds === $this->max_checked_feeds)
|
|
{
|
|
break;
|
|
}
|
|
if ($link->hasAttribute('href') && $link->hasAttribute('rel'))
|
|
{
|
|
$rel = array_unique($this->registry->call('Misc', 'space_seperated_tokens', array(strtolower($link->getAttribute('rel')))));
|
|
$line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1;
|
|
|
|
if ($this->base_location < $line)
|
|
{
|
|
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base));
|
|
}
|
|
else
|
|
{
|
|
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base));
|
|
}
|
|
if ($href === false)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (!in_array($href, $done) && in_array('feed', $rel) || (in_array('alternate', $rel) && !in_array('stylesheet', $rel) && $link->hasAttribute('type') && in_array(strtolower($this->registry->call('Misc', 'parse_mime', array($link->getAttribute('type')))), array('application/rss+xml', 'application/atom+xml'))) && !isset($feeds[$href]))
|
|
{
|
|
$this->checked_feeds++;
|
|
$headers = array(
|
|
'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1',
|
|
);
|
|
$feed = $this->registry->create('File', array($href, $this->timeout, 5, $headers, $this->useragent));
|
|
if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed))
|
|
{
|
|
$feeds[$href] = $feed;
|
|
}
|
|
}
|
|
$done[] = $href;
|
|
}
|
|
}
|
|
|
|
return $feeds;
|
|
}
|
|
|
|
public function get_links()
|
|
{
|
|
if ($this->dom === null)
|
|
{
|
|
throw new SimplePie_Exception('DOMDocument not found, unable to use locator');
|
|
}
|
|
|
|
$links = $this->dom->getElementsByTagName('a');
|
|
foreach ($links as $link)
|
|
{
|
|
if ($link->hasAttribute('href'))
|
|
{
|
|
$href = trim($link->getAttribute('href'));
|
|
$parsed = $this->registry->call('Misc', 'parse_url', array($href));
|
|
if ($parsed['scheme'] === '' || preg_match('/^(http(s)|feed)?$/i', $parsed['scheme']))
|
|
{
|
|
if (method_exists($link, 'getLineNo') && $this->base_location < $link->getLineNo())
|
|
{
|
|
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base));
|
|
}
|
|
else
|
|
{
|
|
$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base));
|
|
}
|
|
if ($href === false)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
$current = $this->registry->call('Misc', 'parse_url', array($this->file->url));
|
|
|
|
if ($parsed['authority'] === '' || $parsed['authority'] === $current['authority'])
|
|
{
|
|
$this->local[] = $href;
|
|
}
|
|
else
|
|
{
|
|
$this->elsewhere[] = $href;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$this->local = array_unique($this->local);
|
|
$this->elsewhere = array_unique($this->elsewhere);
|
|
if (!empty($this->local) || !empty($this->elsewhere))
|
|
{
|
|
return true;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public function extension(&$array)
|
|
{
|
|
foreach ($array as $key => $value)
|
|
{
|
|
if ($this->checked_feeds === $this->max_checked_feeds)
|
|
{
|
|
break;
|
|
}
|
|
if (in_array(strtolower(strrchr($value, '.')), array('.rss', '.rdf', '.atom', '.xml')))
|
|
{
|
|
$this->checked_feeds++;
|
|
|
|
$headers = array(
|
|
'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1',
|
|
);
|
|
$feed = $this->registry->create('File', array($value, $this->timeout, 5, $headers, $this->useragent));
|
|
if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed))
|
|
{
|
|
return $feed;
|
|
}
|
|
else
|
|
{
|
|
unset($array[$key]);
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public function body(&$array)
|
|
{
|
|
foreach ($array as $key => $value)
|
|
{
|
|
if ($this->checked_feeds === $this->max_checked_feeds)
|
|
{
|
|
break;
|
|
}
|
|
if (preg_match('/(rss|rdf|atom|xml)/i', $value))
|
|
{
|
|
$this->checked_feeds++;
|
|
$headers = array(
|
|
'Accept' => 'application/atom+xml, application/rss+xml, application/rdf+xml;q=0.9, application/xml;q=0.8, text/xml;q=0.8, text/html;q=0.7, unknown/unknown;q=0.1, application/unknown;q=0.1, */*;q=0.1',
|
|
);
|
|
$feed = $this->registry->create('File', array($value, $this->timeout, 5, null, $this->useragent));
|
|
if ($feed->success && ($feed->method & SIMPLEPIE_FILE_SOURCE_REMOTE === 0 || ($feed->status_code === 200 || $feed->status_code > 206 && $feed->status_code < 300)) && $this->is_feed($feed))
|
|
{
|
|
return $feed;
|
|
}
|
|
else
|
|
{
|
|
unset($array[$key]);
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|