Edit File by line

<?php

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/**

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* SimplePie

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* A PHP-Based RSS and Atom Feed Framework.

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* Takes the hard work out of managing a complete RSS/Atom solution.

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* Redistribution and use in source and binary forms, with or without modification, are

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* permitted provided that the following conditions are met:

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* * Redistributions of source code must retain the above copyright notice, this list of

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* conditions and the following disclaimer.

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* * Redistributions in binary form must reproduce the above copyright notice, this list

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* of conditions and the following disclaimer in the documentation and/or other materials

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* provided with the distribution.

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* * Neither the name of the SimplePie Team nor the names of its contributors may be used

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* to endorse or promote products derived from this software without specific prior

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* written permission.

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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS

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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS

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* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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* POSSIBILITY OF SUCH DAMAGE.

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* @package SimplePie

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* @author Ryan Parman

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* @author Sam Sneddon

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* @author Ryan McCue

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* @link http://simplepie.org/ SimplePie

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* @license http://www.opensource.org/licenses/bsd-license.php BSD License

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/**

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* Used for feed auto-discovery

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* This class can be overloaded with {@see SimplePie::set_locator_class()}

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* @package SimplePie

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class SimplePie_Locator

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{

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var $useragent;

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var $timeout;

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var $file;

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var $local = array();

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var $elsewhere = array();

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var $cached_entities = array();

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var $http_base;

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var $base;

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var $base_location = 0;

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var $checked_feeds = 0;

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var $max_checked_feeds = 10;

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var $force_fsockopen = false;

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var $curl_options = array();

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protected $registry;

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public function __construct(SimplePie_File $file, $timeout = 10, $useragent = null, $max_checked_feeds = 10, $force_fsockopen = false, $curl_options = array())

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{

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$this->file = $file;

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$this->useragent = $useragent;

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$this->timeout = $timeout;

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$this->max_checked_feeds = $max_checked_feeds;

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$this->force_fsockopen = $force_fsockopen;

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$this->curl_options = $curl_options;

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if (class_exists('DOMDocument'))

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{

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$this->dom = new DOMDocument();

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set_error_handler(array('SimplePie_Misc', 'silence_errors'));

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$this->dom->loadHTML($this->file->body);

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restore_error_handler();

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}

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else

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{

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$this->dom = null;

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}

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}

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public function set_registry(SimplePie_Registry $registry)

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{

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$this->registry = $registry;

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}

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public function find($type = SIMPLEPIE_LOCATOR_ALL, &$working = null)

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{

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if ($this->is_feed($this->file))

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{

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return $this->file;

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}

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if ($this->file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)

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{

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$sniffer = $this->registry->create('Content_Type_Sniffer', array($this->file));

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if ($sniffer->get_type() !== 'text/html')

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{

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return null;

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}

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}

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if ($type & ~SIMPLEPIE_LOCATOR_NONE)

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{

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$this->get_base();

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}

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if ($type & SIMPLEPIE_LOCATOR_AUTODISCOVERY && $working = $this->autodiscovery())

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{

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return $working[0];

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}

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if ($type & (SIMPLEPIE_LOCATOR_LOCAL_EXTENSION | SIMPLEPIE_LOCATOR_LOCAL_BODY | SIMPLEPIE_LOCATOR_REMOTE_EXTENSION | SIMPLEPIE_LOCATOR_REMOTE_BODY) && $this->get_links())

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{

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if ($type & SIMPLEPIE_LOCATOR_LOCAL_EXTENSION && $working = $this->extension($this->local))

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{

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return $working[0];

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}

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if ($type & SIMPLEPIE_LOCATOR_LOCAL_BODY && $working = $this->body($this->local))

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{

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return $working[0];

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}

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if ($type & SIMPLEPIE_LOCATOR_REMOTE_EXTENSION && $working = $this->extension($this->elsewhere))

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{

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return $working[0];

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}

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if ($type & SIMPLEPIE_LOCATOR_REMOTE_BODY && $working = $this->body($this->elsewhere))

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{

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return $working[0];

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}

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}

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return null;

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}

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public function is_feed($file, $check_html = false)

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{

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if ($file->method & SIMPLEPIE_FILE_SOURCE_REMOTE)

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{

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$sniffer = $this->registry->create('Content_Type_Sniffer', array($file));

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$sniffed = $sniffer->get_type();

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$mime_types = array('application/rss+xml', 'application/rdf+xml',

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'text/rdf', 'application/atom+xml', 'text/xml',

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'application/xml', 'application/x-rss+xml');

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if ($check_html)

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{

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$mime_types[] = 'text/html';

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}

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return in_array($sniffed, $mime_types);

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}

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elseif ($file->method & SIMPLEPIE_FILE_SOURCE_LOCAL)

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{

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return true;

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}

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else

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{

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return false;

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}

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}

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public function get_base()

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{

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if ($this->dom === null)

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{

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throw new SimplePie_Exception('DOMDocument not found, unable to use locator');

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}

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$this->http_base = $this->file->url;

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$this->base = $this->http_base;

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$elements = $this->dom->getElementsByTagName('base');

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foreach ($elements as $element)

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{

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if ($element->hasAttribute('href'))

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{

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$base = $this->registry->call('Misc', 'absolutize_url', array(trim($element->getAttribute('href')), $this->http_base));

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if ($base === false)

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{

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continue;

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}

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$this->base = $base;

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$this->base_location = method_exists($element, 'getLineNo') ? $element->getLineNo() : 0;

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break;

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}

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}

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}

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public function autodiscovery()

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{

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$done = array();

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$feeds = array();

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$feeds = array_merge($feeds, $this->search_elements_by_tag('link', $done, $feeds));

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$feeds = array_merge($feeds, $this->search_elements_by_tag('a', $done, $feeds));

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$feeds = array_merge($feeds, $this->search_elements_by_tag('area', $done, $feeds));

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if (!empty($feeds))

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{

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return array_values($feeds);

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}

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return null;

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}

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protected function search_elements_by_tag($name, &$done, $feeds)

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{

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if ($this->dom === null)

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{

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throw new SimplePie_Exception('DOMDocument not found, unable to use locator');

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}

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$links = $this->dom->getElementsByTagName($name);

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foreach ($links as $link)

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{

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if ($this->checked_feeds === $this->max_checked_feeds)

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{

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break;

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}

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if ($link->hasAttribute('href') && $link->hasAttribute('rel'))

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{

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$rel = array_unique($this->registry->call('Misc', 'space_separated_tokens', array(strtolower($link->getAttribute('rel')))));

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$line = method_exists($link, 'getLineNo') ? $link->getLineNo() : 1;

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if ($this->base_location < $line)

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{

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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base));

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}

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else

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{

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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base));

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}

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if ($href === false)

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{

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continue;

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}

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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($link->getAttribute('type')))), array('text/html', 'application/rss+xml', 'application/atom+xml'))) && !isset($feeds[$href]))

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{

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$this->checked_feeds++;

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$headers = array(

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'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',

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);

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$feed = $this->registry->create('File', array($href, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options));

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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, true))

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{

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$feeds[$href] = $feed;

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}

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}

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$done[] = $href;

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}

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}

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return $feeds;

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}

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public function get_links()

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{

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if ($this->dom === null)

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{

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throw new SimplePie_Exception('DOMDocument not found, unable to use locator');

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}

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$links = $this->dom->getElementsByTagName('a');

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foreach ($links as $link)

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{

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if ($link->hasAttribute('href'))

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{

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$href = trim($link->getAttribute('href'));

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$parsed = $this->registry->call('Misc', 'parse_url', array($href));

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if ($parsed['scheme'] === '' || preg_match('/^(https?|feed)?$/i', $parsed['scheme']))

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{

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if (method_exists($link, 'getLineNo') && $this->base_location < $link->getLineNo())

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{

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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->base));

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}

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else

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{

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$href = $this->registry->call('Misc', 'absolutize_url', array(trim($link->getAttribute('href')), $this->http_base));

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}

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if ($href === false)

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{

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continue;

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}

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$current = $this->registry->call('Misc', 'parse_url', array($this->file->url));

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if ($parsed['authority'] === '' || $parsed['authority'] === $current['authority'])

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{

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$this->local[] = $href;

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}

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else

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{

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$this->elsewhere[] = $href;

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}

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}

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}

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}

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$this->local = array_unique($this->local);

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$this->elsewhere = array_unique($this->elsewhere);

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if (!empty($this->local) || !empty($this->elsewhere))

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{

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return true;

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}

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return null;

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}

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public function get_rel_link($rel)

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{

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if ($this->dom === null)

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{

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throw new SimplePie_Exception('DOMDocument not found, unable to use '.

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'locator');

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}

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if (!class_exists('DOMXpath'))

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{

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throw new SimplePie_Exception('DOMXpath not found, unable to use '.

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'get_rel_link');

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}

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$xpath = new DOMXpath($this->dom);

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$query = '//a[@rel and @href] | //link[@rel and @href]';

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foreach ($xpath->query($query) as $link)

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{

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$href = trim($link->getAttribute('href'));

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$parsed = $this->registry->call('Misc', 'parse_url', array($href));

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if ($parsed['scheme'] === '' ||

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preg_match('/^https?$/i', $parsed['scheme']))

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{

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if (method_exists($link, 'getLineNo') &&

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$this->base_location < $link->getLineNo())

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{

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$href =

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$this->registry->call('Misc', 'absolutize_url',

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array(trim($link->getAttribute('href')),

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$this->base));

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}

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else

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{

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$href =

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$this->registry->call('Misc', 'absolutize_url',

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array(trim($link->getAttribute('href')),

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$this->http_base));

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}

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if ($href === false)

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{

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return null;

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}

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$rel_values = explode(' ', strtolower($link->getAttribute('rel')));

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if (in_array($rel, $rel_values))

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{

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return $href;

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}

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}

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}

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return null;

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}

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public function extension(&$array)

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{

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foreach ($array as $key => $value)

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{

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if ($this->checked_feeds === $this->max_checked_feeds)

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{

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break;

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}

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if (in_array(strtolower(strrchr($value, '.')), array('.rss', '.rdf', '.atom', '.xml')))

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{

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$this->checked_feeds++;

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$headers = array(

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);

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$feed = $this->registry->create('File', array($value, $this->timeout, 5, $headers, $this->useragent, $this->force_fsockopen, $this->curl_options));

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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))

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{

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return array($feed);

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}

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else

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{

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unset($array[$key]);

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}

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}

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}

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return null;

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}

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public function body(&$array)

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{

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foreach ($array as $key => $value)

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{

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if ($this->checked_feeds === $this->max_checked_feeds)

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{

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break;

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}

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if (preg_match('/(feed|rss|rdf|atom|xml)/i', $value))

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{

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$this->checked_feeds++;

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$headers = array(

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);

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$feed = $this->registry->create('File', array($value, $this->timeout, 5, null, $this->useragent, $this->force_fsockopen, $this->curl_options));

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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))

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{

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return array($feed);

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}

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else

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{

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unset($array[$key]);

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}

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}

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}

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return null;

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}

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}

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