408 lines
12 KiB
PHP
408 lines
12 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) 2004-2012, 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 1.3.1
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* @copyright 2004-2012 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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*/
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/**
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* Parses XML into something sane
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*
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*
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* This class can be overloaded with {@see SimplePie::set_parser_class()}
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*
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* @package SimplePie
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* @subpackage Parsing
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*/
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class SimplePie_Parser
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{
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var $error_code;
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var $error_string;
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var $current_line;
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var $current_column;
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var $current_byte;
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var $separator = ' ';
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var $namespace = array('');
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var $element = array('');
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var $xml_base = array('');
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var $xml_base_explicit = array(false);
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var $xml_lang = array('');
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var $data = array();
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var $datas = array(array());
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var $current_xhtml_construct = -1;
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var $encoding;
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protected $registry;
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public function set_registry(SimplePie_Registry $registry)
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{
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$this->registry = $registry;
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}
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public function parse(&$data, $encoding)
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{
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// Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character
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if (strtoupper($encoding) === 'US-ASCII')
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{
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$this->encoding = 'UTF-8';
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}
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else
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{
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$this->encoding = $encoding;
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}
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// Strip BOM:
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// UTF-32 Big Endian BOM
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if (substr($data, 0, 4) === "\x00\x00\xFE\xFF")
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{
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$data = substr($data, 4);
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}
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// UTF-32 Little Endian BOM
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elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00")
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{
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$data = substr($data, 4);
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}
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// UTF-16 Big Endian BOM
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elseif (substr($data, 0, 2) === "\xFE\xFF")
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{
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$data = substr($data, 2);
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}
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// UTF-16 Little Endian BOM
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elseif (substr($data, 0, 2) === "\xFF\xFE")
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{
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$data = substr($data, 2);
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}
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// UTF-8 BOM
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elseif (substr($data, 0, 3) === "\xEF\xBB\xBF")
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{
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$data = substr($data, 3);
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}
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if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false)
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{
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$declaration = $this->registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5)));
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if ($declaration->parse())
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{
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$data = substr($data, $pos + 2);
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$data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' . $data;
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}
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else
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{
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$this->error_string = 'SimplePie bug! Please report this!';
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return false;
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}
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}
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$return = true;
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static $xml_is_sane = null;
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if ($xml_is_sane === null)
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{
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$parser_check = xml_parser_create();
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xml_parse_into_struct($parser_check, '<foo>&</foo>', $values);
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xml_parser_free($parser_check);
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$xml_is_sane = isset($values[0]['value']);
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}
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// Create the parser
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if ($xml_is_sane)
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{
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$xml = xml_parser_create_ns($this->encoding, $this->separator);
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xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);
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xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);
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xml_set_object($xml, $this);
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xml_set_character_data_handler($xml, 'cdata');
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xml_set_element_handler($xml, 'tag_open', 'tag_close');
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// Parse!
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if (!xml_parse($xml, $data, true))
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{
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$this->error_code = xml_get_error_code($xml);
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$this->error_string = xml_error_string($this->error_code);
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$return = false;
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}
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$this->current_line = xml_get_current_line_number($xml);
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$this->current_column = xml_get_current_column_number($xml);
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$this->current_byte = xml_get_current_byte_index($xml);
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xml_parser_free($xml);
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return $return;
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}
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else
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{
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libxml_clear_errors();
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$xml = new XMLReader();
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$xml->xml($data);
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while (@$xml->read())
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{
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switch ($xml->nodeType)
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{
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case constant('XMLReader::END_ELEMENT'):
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if ($xml->namespaceURI !== '')
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{
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$tagName = $xml->namespaceURI . $this->separator . $xml->localName;
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}
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else
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{
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$tagName = $xml->localName;
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}
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$this->tag_close(null, $tagName);
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break;
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case constant('XMLReader::ELEMENT'):
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$empty = $xml->isEmptyElement;
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if ($xml->namespaceURI !== '')
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{
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$tagName = $xml->namespaceURI . $this->separator . $xml->localName;
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}
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else
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{
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$tagName = $xml->localName;
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}
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$attributes = array();
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while ($xml->moveToNextAttribute())
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{
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if ($xml->namespaceURI !== '')
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{
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$attrName = $xml->namespaceURI . $this->separator . $xml->localName;
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}
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else
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{
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$attrName = $xml->localName;
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}
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$attributes[$attrName] = $xml->value;
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}
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$this->tag_open(null, $tagName, $attributes);
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if ($empty)
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{
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$this->tag_close(null, $tagName);
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}
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break;
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case constant('XMLReader::TEXT'):
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case constant('XMLReader::CDATA'):
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$this->cdata(null, $xml->value);
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break;
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}
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}
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if ($error = libxml_get_last_error())
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{
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$this->error_code = $error->code;
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$this->error_string = $error->message;
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$this->current_line = $error->line;
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$this->current_column = $error->column;
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return false;
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}
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else
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{
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return true;
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}
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}
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}
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public function get_error_code()
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{
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return $this->error_code;
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}
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public function get_error_string()
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{
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return $this->error_string;
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}
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public function get_current_line()
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{
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return $this->current_line;
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}
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public function get_current_column()
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{
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return $this->current_column;
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}
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public function get_current_byte()
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{
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return $this->current_byte;
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}
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public function get_data()
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{
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return $this->data;
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}
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public function tag_open($parser, $tag, $attributes)
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{
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list($this->namespace[], $this->element[]) = $this->split_ns($tag);
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$attribs = array();
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foreach ($attributes as $name => $value)
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{
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list($attrib_namespace, $attribute) = $this->split_ns($name);
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$attribs[$attrib_namespace][$attribute] = $value;
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}
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if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['base']))
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{
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$base = $this->registry->call('Misc', 'absolutize_url', array($attribs[SIMPLEPIE_NAMESPACE_XML]['base'], end($this->xml_base)));
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if ($base !== false)
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{
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$this->xml_base[] = $base;
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$this->xml_base_explicit[] = true;
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}
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}
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else
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{
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$this->xml_base[] = end($this->xml_base);
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$this->xml_base_explicit[] = end($this->xml_base_explicit);
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}
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if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['lang']))
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{
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$this->xml_lang[] = $attribs[SIMPLEPIE_NAMESPACE_XML]['lang'];
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}
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else
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{
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$this->xml_lang[] = end($this->xml_lang);
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}
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if ($this->current_xhtml_construct >= 0)
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{
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$this->current_xhtml_construct++;
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if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML)
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{
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$this->data['data'] .= '<' . end($this->element);
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if (isset($attribs['']))
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{
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foreach ($attribs[''] as $name => $value)
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{
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$this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';
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}
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}
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$this->data['data'] .= '>';
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}
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}
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else
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{
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$this->datas[] =& $this->data;
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$this->data =& $this->data['child'][end($this->namespace)][end($this->element)][];
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$this->data = array('data' => '', 'attribs' => $attribs, 'xml_base' => end($this->xml_base), 'xml_base_explicit' => end($this->xml_base_explicit), 'xml_lang' => end($this->xml_lang));
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if ((end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_03 && in_array(end($this->element), array('title', 'tagline', 'copyright', 'info', 'summary', 'content')) && isset($attribs['']['mode']) && $attribs['']['mode'] === 'xml')
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|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_ATOM_10 && in_array(end($this->element), array('rights', 'subtitle', 'summary', 'info', 'title', 'content')) && isset($attribs['']['type']) && $attribs['']['type'] === 'xhtml')
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|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_20 && in_array(end($this->element), array('title')))
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|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_090 && in_array(end($this->element), array('title')))
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|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_10 && in_array(end($this->element), array('title'))))
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{
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$this->current_xhtml_construct = 0;
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}
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}
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}
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public function cdata($parser, $cdata)
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{
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if ($this->current_xhtml_construct >= 0)
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{
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$this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding);
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}
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else
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{
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$this->data['data'] .= $cdata;
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}
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}
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public function tag_close($parser, $tag)
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{
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if ($this->current_xhtml_construct >= 0)
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{
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$this->current_xhtml_construct--;
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if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML && !in_array(end($this->element), array('area', 'base', 'basefont', 'br', 'col', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param')))
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{
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$this->data['data'] .= '</' . end($this->element) . '>';
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}
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}
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if ($this->current_xhtml_construct === -1)
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{
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$this->data =& $this->datas[count($this->datas) - 1];
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array_pop($this->datas);
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}
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array_pop($this->element);
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array_pop($this->namespace);
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array_pop($this->xml_base);
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array_pop($this->xml_base_explicit);
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array_pop($this->xml_lang);
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}
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public function split_ns($string)
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{
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static $cache = array();
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if (!isset($cache[$string]))
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{
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if ($pos = strpos($string, $this->separator))
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{
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static $separator_length;
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if (!$separator_length)
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{
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$separator_length = strlen($this->separator);
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}
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$namespace = substr($string, 0, $pos);
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$local_name = substr($string, $pos + $separator_length);
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if (strtolower($namespace) === SIMPLEPIE_NAMESPACE_ITUNES)
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{
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$namespace = SIMPLEPIE_NAMESPACE_ITUNES;
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}
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// Normalize the Media RSS namespaces
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if ($namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG ||
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$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2 ||
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$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3 ||
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$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4 ||
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$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5 )
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{
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$namespace = SIMPLEPIE_NAMESPACE_MEDIARSS;
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}
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$cache[$string] = array($namespace, $local_name);
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}
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else
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{
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$cache[$string] = array('', $string);
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}
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}
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return $cache[$string];
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}
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}
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