786 lines
17 KiB
PHP
786 lines
17 KiB
PHP
<?php
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/**
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* SimplePie
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*
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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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*
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* Copyright (c) 2004-2009, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
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* All rights reserved.
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*
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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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*
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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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*
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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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*
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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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*
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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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*
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* @package SimplePie
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* @version 1.3-dev
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* @copyright 2004-2010 Ryan Parman, Geoffrey Sneddon, Ryan McCue
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* @author Ryan Parman
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* @author Geoffrey 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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* @todo phpDoc comments
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*/
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/**
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* IRI parser/serialiser
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*
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* @package SimplePie
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*/
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class SimplePie_IRI
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{
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/**
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* Scheme
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*
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* @access private
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* @var string
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*/
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var $scheme;
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/**
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* User Information
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*
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* @access private
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* @var string
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*/
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var $userinfo;
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/**
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* Host
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*
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* @access private
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* @var string
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*/
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var $host;
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/**
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* Port
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*
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* @access private
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* @var string
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*/
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var $port;
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/**
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* Path
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*
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* @access private
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* @var string
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*/
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var $path;
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/**
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* Query
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*
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* @access private
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* @var string
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*/
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var $query;
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/**
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* Fragment
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*
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* @access private
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* @var string
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*/
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var $fragment;
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/**
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* Whether the object represents a valid IRI
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*
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* @access private
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* @var array
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*/
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var $valid = array();
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/**
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* Return the entire IRI when you try and read the object as a string
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*
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* @access public
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* @return string
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*/
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public function __toString()
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{
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return $this->get_iri();
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}
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/**
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* Create a new IRI object, from a specified string
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*
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* @access public
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* @param string $iri
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* @return SimplePie_IRI
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*/
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public function __construct($iri)
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{
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$iri = (string) $iri;
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if ($iri !== '')
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{
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$parsed = $this->parse_iri($iri);
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$this->set_scheme($parsed['scheme']);
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$this->set_authority($parsed['authority']);
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$this->set_path($parsed['path']);
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$this->set_query($parsed['query']);
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$this->set_fragment($parsed['fragment']);
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}
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}
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/**
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* Create a new IRI object by resolving a relative IRI
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*
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* @static
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* @access public
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* @param SimplePie_IRI $base Base IRI
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* @param string $relative Relative IRI
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* @return SimplePie_IRI
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*/
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public static function absolutize($base, $relative)
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{
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$relative = (string) $relative;
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if ($relative !== '')
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{
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$relative = new SimplePie_IRI($relative);
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if ($relative->get_scheme() !== null)
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{
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$target = $relative;
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}
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elseif ($base->get_iri() !== null)
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{
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if ($relative->get_authority() !== null)
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{
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$target = $relative;
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$target->set_scheme($base->get_scheme());
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}
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else
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{
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$target = new SimplePie_IRI('');
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$target->set_scheme($base->get_scheme());
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$target->set_userinfo($base->get_userinfo());
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$target->set_host($base->get_host());
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$target->set_port($base->get_port());
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if ($relative->get_path() !== null)
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{
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if (strpos($relative->get_path(), '/') === 0)
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{
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$target->set_path($relative->get_path());
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}
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elseif (($base->get_userinfo() !== null || $base->get_host() !== null || $base->get_port() !== null) && $base->get_path() === null)
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{
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$target->set_path('/' . $relative->get_path());
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}
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elseif (($last_segment = strrpos($base->get_path(), '/')) !== false)
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{
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$target->set_path(substr($base->get_path(), 0, $last_segment + 1) . $relative->get_path());
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}
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else
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{
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$target->set_path($relative->get_path());
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}
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$target->set_query($relative->get_query());
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}
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else
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{
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$target->set_path($base->get_path());
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if ($relative->get_query() !== null)
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{
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$target->set_query($relative->get_query());
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}
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elseif ($base->get_query() !== null)
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{
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$target->set_query($base->get_query());
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}
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}
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}
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$target->set_fragment($relative->get_fragment());
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}
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else
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{
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// No base URL, just return the relative URL
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$target = $relative;
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}
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}
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else
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{
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$target = $base;
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}
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return $target;
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}
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/**
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* Parse an IRI into scheme/authority/path/query/fragment segments
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*
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* @access private
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* @param string $iri
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* @return array
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*/
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public function parse_iri($iri)
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{
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preg_match('/^(([^:\/?#]+):)?(\/\/([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?$/', $iri, $match);
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for ($i = count($match); $i <= 9; $i++)
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{
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$match[$i] = '';
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}
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return array('scheme' => $match[2], 'authority' => $match[4], 'path' => $match[5], 'query' => $match[7], 'fragment' => $match[9]);
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}
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/**
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* Remove dot segments from a path
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*
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* @access private
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* @param string $input
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* @return string
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*/
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public function remove_dot_segments($input)
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{
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$output = '';
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while (strpos($input, './') !== false || strpos($input, '/.') !== false || $input === '.' || $input === '..')
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{
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// A: If the input buffer begins with a prefix of "../" or "./", then remove that prefix from the input buffer; otherwise,
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if (strpos($input, '../') === 0)
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{
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$input = substr($input, 3);
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}
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elseif (strpos($input, './') === 0)
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{
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$input = substr($input, 2);
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}
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// B: if the input buffer begins with a prefix of "/./" or "/.", where "." is a complete path segment, then replace that prefix with "/" in the input buffer; otherwise,
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elseif (strpos($input, '/./') === 0)
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{
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$input = substr_replace($input, '/', 0, 3);
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}
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elseif ($input === '/.')
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{
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$input = '/';
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}
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// C: if the input buffer begins with a prefix of "/../" or "/..", where ".." is a complete path segment, then replace that prefix with "/" in the input buffer and remove the last segment and its preceding "/" (if any) from the output buffer; otherwise,
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elseif (strpos($input, '/../') === 0)
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{
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$input = substr_replace($input, '/', 0, 4);
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$output = substr_replace($output, '', strrpos($output, '/'));
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}
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elseif ($input === '/..')
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{
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$input = '/';
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$output = substr_replace($output, '', strrpos($output, '/'));
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}
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// D: if the input buffer consists only of "." or "..", then remove that from the input buffer; otherwise,
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elseif ($input === '.' || $input === '..')
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{
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$input = '';
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}
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// E: move the first path segment in the input buffer to the end of the output buffer, including the initial "/" character (if any) and any subsequent characters up to, but not including, the next "/" character or the end of the input buffer
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elseif (($pos = strpos($input, '/', 1)) !== false)
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{
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$output .= substr($input, 0, $pos);
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$input = substr_replace($input, '', 0, $pos);
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}
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else
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{
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$output .= $input;
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$input = '';
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}
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}
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return $output . $input;
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}
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/**
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* Replace invalid character with percent encoding
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*
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* @access private
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* @param string $string Input string
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* @param string $valid_chars Valid characters
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* @param int $case Normalise case
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* @return string
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*/
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public function replace_invalid_with_pct_encoding($string, $valid_chars, $case = SIMPLEPIE_SAME_CASE)
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{
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// Normalise case
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if ($case & SIMPLEPIE_LOWERCASE)
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{
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$string = strtolower($string);
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}
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elseif ($case & SIMPLEPIE_UPPERCASE)
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{
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$string = strtoupper($string);
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}
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// Store position and string length (to avoid constantly recalculating this)
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$position = 0;
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$strlen = strlen($string);
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// Loop as long as we have invalid characters, advancing the position to the next invalid character
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while (($position += strspn($string, $valid_chars, $position)) < $strlen)
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{
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// If we have a % character
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if ($string[$position] === '%')
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{
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// If we have a pct-encoded section
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if ($position + 2 < $strlen && strspn($string, '0123456789ABCDEFabcdef', $position + 1, 2) === 2)
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{
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// Get the the represented character
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$chr = chr(hexdec(substr($string, $position + 1, 2)));
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// If the character is valid, replace the pct-encoded with the actual character while normalising case
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if (strpos($valid_chars, $chr) !== false)
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{
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if ($case & SIMPLEPIE_LOWERCASE)
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{
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$chr = strtolower($chr);
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}
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elseif ($case & SIMPLEPIE_UPPERCASE)
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{
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$chr = strtoupper($chr);
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}
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$string = substr_replace($string, $chr, $position, 3);
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$strlen -= 2;
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$position++;
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}
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// Otherwise just normalise the pct-encoded to uppercase
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else
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{
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$string = substr_replace($string, strtoupper(substr($string, $position + 1, 2)), $position + 1, 2);
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$position += 3;
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}
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}
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// If we don't have a pct-encoded section, just replace the % with its own esccaped form
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else
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{
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$string = substr_replace($string, '%25', $position, 1);
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$strlen += 2;
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$position += 3;
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}
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}
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// If we have an invalid character, change into its pct-encoded form
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else
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{
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$replacement = sprintf("%%%02X", ord($string[$position]));
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$string = str_replace($string[$position], $replacement, $string);
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$strlen = strlen($string);
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}
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}
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return $string;
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}
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/**
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* Check if the object represents a valid IRI
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*
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* @access public
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* @return bool
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*/
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public function is_valid()
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{
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return array_sum($this->valid) === count($this->valid);
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}
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/**
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* Set the scheme. Returns true on success, false on failure (if there are
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* any invalid characters).
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*
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* @access public
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* @param string $scheme
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* @return bool
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*/
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public function set_scheme($scheme)
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{
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if ($scheme === null || $scheme === '')
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{
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$this->scheme = null;
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}
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else
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{
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$len = strlen($scheme);
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switch (true)
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{
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case $len > 1:
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if (!strspn($scheme, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-.', 1))
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{
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$this->scheme = null;
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$this->valid[__FUNCTION__] = false;
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return false;
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}
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case $len > 0:
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if (!strspn($scheme, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', 0, 1))
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{
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$this->scheme = null;
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$this->valid[__FUNCTION__] = false;
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return false;
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}
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}
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$this->scheme = strtolower($scheme);
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}
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$this->valid[__FUNCTION__] = true;
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return true;
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}
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/**
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* Set the authority. Returns true on success, false on failure (if there are
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* any invalid characters).
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*
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* @access public
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* @param string $authority
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* @return bool
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*/
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public function set_authority($authority)
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{
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if (($userinfo_end = strrpos($authority, '@')) !== false)
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{
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$userinfo = substr($authority, 0, $userinfo_end);
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$authority = substr($authority, $userinfo_end + 1);
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}
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else
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{
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$userinfo = null;
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}
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if (($port_start = strpos($authority, ':')) !== false)
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{
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$port = substr($authority, $port_start + 1);
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$authority = substr($authority, 0, $port_start);
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}
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else
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{
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$port = null;
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}
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return $this->set_userinfo($userinfo) && $this->set_host($authority) && $this->set_port($port);
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}
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|
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/**
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* Set the userinfo.
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*
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* @access public
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* @param string $userinfo
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* @return bool
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*/
|
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public function set_userinfo($userinfo)
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{
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if ($userinfo === null || $userinfo === '')
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{
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$this->userinfo = null;
|
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}
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else
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{
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$this->userinfo = $this->replace_invalid_with_pct_encoding($userinfo, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=:');
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}
|
|
$this->valid[__FUNCTION__] = true;
|
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return true;
|
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}
|
|
|
|
/**
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|
* Set the host. Returns true on success, false on failure (if there are
|
|
* any invalid characters).
|
|
*
|
|
* @access public
|
|
* @param string $host
|
|
* @return bool
|
|
*/
|
|
public function set_host($host)
|
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{
|
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if ($host === null || $host === '')
|
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{
|
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$this->host = null;
|
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$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
elseif ($host[0] === '[' && substr($host, -1) === ']')
|
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{
|
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if (SimplePie_Net_IPv6::checkIPv6(substr($host, 1, -1)))
|
|
{
|
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$this->host = $host;
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
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|
else
|
|
{
|
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$this->host = null;
|
|
$this->valid[__FUNCTION__] = false;
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return false;
|
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}
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}
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else
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{
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$this->host = $this->replace_invalid_with_pct_encoding($host, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=', SIMPLEPIE_LOWERCASE);
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$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the port. Returns true on success, false on failure (if there are
|
|
* any invalid characters).
|
|
*
|
|
* @access public
|
|
* @param string $port
|
|
* @return bool
|
|
*/
|
|
public function set_port($port)
|
|
{
|
|
if ($port === null || $port === '')
|
|
{
|
|
$this->port = null;
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
elseif (strspn($port, '0123456789') === strlen($port))
|
|
{
|
|
$this->port = (int) $port;
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
$this->port = null;
|
|
$this->valid[__FUNCTION__] = false;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the path.
|
|
*
|
|
* @access public
|
|
* @param string $path
|
|
* @return bool
|
|
*/
|
|
public function set_path($path)
|
|
{
|
|
if ($path === null || $path === '')
|
|
{
|
|
$this->path = null;
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
elseif (substr($path, 0, 2) === '//' && $this->userinfo === null && $this->host === null && $this->port === null)
|
|
{
|
|
$this->path = null;
|
|
$this->valid[__FUNCTION__] = false;
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
$this->path = $this->replace_invalid_with_pct_encoding($path, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=@/');
|
|
if ($this->scheme !== null)
|
|
{
|
|
$this->path = $this->remove_dot_segments($this->path);
|
|
}
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set the query.
|
|
*
|
|
* @access public
|
|
* @param string $query
|
|
* @return bool
|
|
*/
|
|
public function set_query($query)
|
|
{
|
|
if ($query === null || $query === '')
|
|
{
|
|
$this->query = null;
|
|
}
|
|
else
|
|
{
|
|
$this->query = $this->replace_invalid_with_pct_encoding($query, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$\'()*+,;:@/?&=');
|
|
}
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Set the fragment.
|
|
*
|
|
* @access public
|
|
* @param string $fragment
|
|
* @return bool
|
|
*/
|
|
public function set_fragment($fragment)
|
|
{
|
|
if ($fragment === null || $fragment === '')
|
|
{
|
|
$this->fragment = null;
|
|
}
|
|
else
|
|
{
|
|
$this->fragment = $this->replace_invalid_with_pct_encoding($fragment, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~!$&\'()*+,;=:@/?');
|
|
}
|
|
$this->valid[__FUNCTION__] = true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Get the complete IRI
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_iri()
|
|
{
|
|
$iri = '';
|
|
if ($this->scheme !== null)
|
|
{
|
|
$iri .= $this->scheme . ':';
|
|
}
|
|
if (($authority = $this->get_authority()) !== null)
|
|
{
|
|
$iri .= '//' . $authority;
|
|
}
|
|
if ($this->path !== null)
|
|
{
|
|
$iri .= $this->path;
|
|
}
|
|
if ($this->query !== null)
|
|
{
|
|
$iri .= '?' . $this->query;
|
|
}
|
|
if ($this->fragment !== null)
|
|
{
|
|
$iri .= '#' . $this->fragment;
|
|
}
|
|
|
|
if ($iri !== '')
|
|
{
|
|
return $iri;
|
|
}
|
|
else
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the scheme
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_scheme()
|
|
{
|
|
return $this->scheme;
|
|
}
|
|
|
|
/**
|
|
* Get the complete authority
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_authority()
|
|
{
|
|
$authority = '';
|
|
if ($this->userinfo !== null)
|
|
{
|
|
$authority .= $this->userinfo . '@';
|
|
}
|
|
if ($this->host !== null)
|
|
{
|
|
$authority .= $this->host;
|
|
}
|
|
if ($this->port !== null)
|
|
{
|
|
$authority .= ':' . $this->port;
|
|
}
|
|
|
|
if ($authority !== '')
|
|
{
|
|
return $authority;
|
|
}
|
|
else
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the user information
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_userinfo()
|
|
{
|
|
return $this->userinfo;
|
|
}
|
|
|
|
/**
|
|
* Get the host
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_host()
|
|
{
|
|
return $this->host;
|
|
}
|
|
|
|
/**
|
|
* Get the port
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_port()
|
|
{
|
|
return $this->port;
|
|
}
|
|
|
|
/**
|
|
* Get the path
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_path()
|
|
{
|
|
return $this->path;
|
|
}
|
|
|
|
/**
|
|
* Get the query
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_query()
|
|
{
|
|
return $this->query;
|
|
}
|
|
|
|
/**
|
|
* Get the fragment
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function get_fragment()
|
|
{
|
|
return $this->fragment;
|
|
}
|
|
} |