1 <?php

     2 /**

     3  * SimplePie

     4  *

     5  * A PHP-Based RSS and Atom Feed Framework.

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

     7  *

     8  * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors

     9  * All rights reserved.

    10  *

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

    12  * permitted provided that the following conditions are met:

    13  *

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

    15  * 	  conditions and the following disclaimer.

    16  *

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

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

    19  * 	  provided with the distribution.

    20  *

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

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

    23  * 	  written permission.

    24  *

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

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

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

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

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

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

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

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

    33  * POSSIBILITY OF SUCH DAMAGE.

    34  *

    35  * @package SimplePie

    36  * @version 1.3.1

    37  * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue

    38  * @author Ryan Parman

    39  * @author Geoffrey Sneddon

    40  * @author Ryan McCue

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

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

    43  */

    44 

    45 /**

    46  * Parses XML into something sane

    47  *

    48  *

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

    50  *

    51  * @package SimplePie

    52  * @subpackage Parsing

    53  */

    54 class SimplePie_Parser

    55 {

    56 	var $error_code;

    57 	var $error_string;

    58 	var $current_line;

    59 	var $current_column;

    60 	var $current_byte;

    61 	var $separator = ' ';

    62 	var $namespace = array('');

    63 	var $element = array('');

    64 	var $xml_base = array('');

    65 	var $xml_base_explicit = array(false);

    66 	var $xml_lang = array('');

    67 	var $data = array();

    68 	var $datas = array(array());

    69 	var $current_xhtml_construct = -1;

    70 	var $encoding;

    71 	protected $registry;

    72 

    73 	public function set_registry(SimplePie_Registry $registry)

    74 	{

    75 		$this->registry = $registry;

    76 	}

    77 

    78 	public function parse(&$data, $encoding)

    79 	{

    80 		// Use UTF-8 if we get passed US-ASCII, as every US-ASCII character is a UTF-8 character

    81 		if (strtoupper($encoding) === 'US-ASCII')

    82 		{

    83 			$this->encoding = 'UTF-8';

    84 		}

    85 		else

    86 		{

    87 			$this->encoding = $encoding;

    88 		}

    89 

    90 		// Strip BOM:

    91 		// UTF-32 Big Endian BOM

    92 		if (substr($data, 0, 4) === "\x00\x00\xFE\xFF")

    93 		{

    94 			$data = substr($data, 4);

    95 		}

    96 		// UTF-32 Little Endian BOM

    97 		elseif (substr($data, 0, 4) === "\xFF\xFE\x00\x00")

    98 		{

    99 			$data = substr($data, 4);

   100 		}

   101 		// UTF-16 Big Endian BOM

   102 		elseif (substr($data, 0, 2) === "\xFE\xFF")

   103 		{

   104 			$data = substr($data, 2);

   105 		}

   106 		// UTF-16 Little Endian BOM

   107 		elseif (substr($data, 0, 2) === "\xFF\xFE")

   108 		{

   109 			$data = substr($data, 2);

   110 		}

   111 		// UTF-8 BOM

   112 		elseif (substr($data, 0, 3) === "\xEF\xBB\xBF")

   113 		{

   114 			$data = substr($data, 3);

   115 		}

   116 

   117 		if (substr($data, 0, 5) === '<?xml' && strspn(substr($data, 5, 1), "\x09\x0A\x0D\x20") && ($pos = strpos($data, '?>')) !== false)

   118 		{

   119 			$declaration = $this->registry->create('XML_Declaration_Parser', array(substr($data, 5, $pos - 5)));

   120 			if ($declaration->parse())

   121 			{

   122 				$data = substr($data, $pos + 2);

   123 				$data = '<?xml version="' . $declaration->version . '" encoding="' . $encoding . '" standalone="' . (($declaration->standalone) ? 'yes' : 'no') . '"?>' . $data;

   124 			}

   125 			else

   126 			{

   127 				$this->error_string = 'SimplePie bug! Please report this!';

   128 				return false;

   129 			}

   130 		}

   131 

   132 		$return = true;

   133 

   134 		static $xml_is_sane = null;

   135 		if ($xml_is_sane === null)

   136 		{

   137 			$parser_check = xml_parser_create();

   138 			xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);

   139 			xml_parser_free($parser_check);

   140 			$xml_is_sane = isset($values[0]['value']);

   141 		}

   142 

   143 		// Create the parser

   144 		if ($xml_is_sane)

   145 		{

   146 			$xml = xml_parser_create_ns($this->encoding, $this->separator);

   147 			xml_parser_set_option($xml, XML_OPTION_SKIP_WHITE, 1);

   148 			xml_parser_set_option($xml, XML_OPTION_CASE_FOLDING, 0);

   149 			xml_set_object($xml, $this);

   150 			xml_set_character_data_handler($xml, 'cdata');

   151 			xml_set_element_handler($xml, 'tag_open', 'tag_close');

   152 

   153 			// Parse!

   154 			if (!xml_parse($xml, $data, true))

   155 			{

   156 				$this->error_code = xml_get_error_code($xml);

   157 				$this->error_string = xml_error_string($this->error_code);

   158 				$return = false;

   159 			}

   160 			$this->current_line = xml_get_current_line_number($xml);

   161 			$this->current_column = xml_get_current_column_number($xml);

   162 			$this->current_byte = xml_get_current_byte_index($xml);

   163 			xml_parser_free($xml);

   164 			return $return;

   165 		}

   166 		else

   167 		{

   168 			libxml_clear_errors();

   169 			$xml = new XMLReader();

   170 			$xml->xml($data);

   171 			while (@$xml->read())

   172 			{

   173 				switch ($xml->nodeType)

   174 				{

   175 

   176 					case constant('XMLReader::END_ELEMENT'):

   177 						if ($xml->namespaceURI !== '')

   178 						{

   179 							$tagName = $xml->namespaceURI . $this->separator . $xml->localName;

   180 						}

   181 						else

   182 						{

   183 							$tagName = $xml->localName;

   184 						}

   185 						$this->tag_close(null, $tagName);

   186 						break;

   187 					case constant('XMLReader::ELEMENT'):

   188 						$empty = $xml->isEmptyElement;

   189 						if ($xml->namespaceURI !== '')

   190 						{

   191 							$tagName = $xml->namespaceURI . $this->separator . $xml->localName;

   192 						}

   193 						else

   194 						{

   195 							$tagName = $xml->localName;

   196 						}

   197 						$attributes = array();

   198 						while ($xml->moveToNextAttribute())

   199 						{

   200 							if ($xml->namespaceURI !== '')

   201 							{

   202 								$attrName = $xml->namespaceURI . $this->separator . $xml->localName;

   203 							}

   204 							else

   205 							{

   206 								$attrName = $xml->localName;

   207 							}

   208 							$attributes[$attrName] = $xml->value;

   209 						}

   210 						$this->tag_open(null, $tagName, $attributes);

   211 						if ($empty)

   212 						{

   213 							$this->tag_close(null, $tagName);

   214 						}

   215 						break;

   216 					case constant('XMLReader::TEXT'):

   217 

   218 					case constant('XMLReader::CDATA'):

   219 						$this->cdata(null, $xml->value);

   220 						break;

   221 				}

   222 			}

   223 			if ($error = libxml_get_last_error())

   224 			{

   225 				$this->error_code = $error->code;

   226 				$this->error_string = $error->message;

   227 				$this->current_line = $error->line;

   228 				$this->current_column = $error->column;

   229 				return false;

   230 			}

   231 			else

   232 			{

   233 				return true;

   234 			}

   235 		}

   236 	}

   237 

   238 	public function get_error_code()

   239 	{

   240 		return $this->error_code;

   241 	}

   242 

   243 	public function get_error_string()

   244 	{

   245 		return $this->error_string;

   246 	}

   247 

   248 	public function get_current_line()

   249 	{

   250 		return $this->current_line;

   251 	}

   252 

   253 	public function get_current_column()

   254 	{

   255 		return $this->current_column;

   256 	}

   257 

   258 	public function get_current_byte()

   259 	{

   260 		return $this->current_byte;

   261 	}

   262 

   263 	public function get_data()

   264 	{

   265 		return $this->data;

   266 	}

   267 

   268 	public function tag_open($parser, $tag, $attributes)

   269 	{

   270 		list($this->namespace[], $this->element[]) = $this->split_ns($tag);

   271 

   272 		$attribs = array();

   273 		foreach ($attributes as $name => $value)

   274 		{

   275 			list($attrib_namespace, $attribute) = $this->split_ns($name);

   276 			$attribs[$attrib_namespace][$attribute] = $value;

   277 		}

   278 

   279 		if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['base']))

   280 		{

   281 			$base = $this->registry->call('Misc', 'absolutize_url', array($attribs[SIMPLEPIE_NAMESPACE_XML]['base'], end($this->xml_base)));

   282 			if ($base !== false)

   283 			{

   284 				$this->xml_base[] = $base;

   285 				$this->xml_base_explicit[] = true;

   286 			}

   287 		}

   288 		else

   289 		{

   290 			$this->xml_base[] = end($this->xml_base);

   291 			$this->xml_base_explicit[] = end($this->xml_base_explicit);

   292 		}

   293 

   294 		if (isset($attribs[SIMPLEPIE_NAMESPACE_XML]['lang']))

   295 		{

   296 			$this->xml_lang[] = $attribs[SIMPLEPIE_NAMESPACE_XML]['lang'];

   297 		}

   298 		else

   299 		{

   300 			$this->xml_lang[] = end($this->xml_lang);

   301 		}

   302 

   303 		if ($this->current_xhtml_construct >= 0)

   304 		{

   305 			$this->current_xhtml_construct++;

   306 			if (end($this->namespace) === SIMPLEPIE_NAMESPACE_XHTML)

   307 			{

   308 				$this->data['data'] .= '<' . end($this->element);

   309 				if (isset($attribs['']))

   310 				{

   311 					foreach ($attribs[''] as $name => $value)

   312 					{

   313 						$this->data['data'] .= ' ' . $name . '="' . htmlspecialchars($value, ENT_COMPAT, $this->encoding) . '"';

   314 					}

   315 				}

   316 				$this->data['data'] .= '>';

   317 			}

   318 		}

   319 		else

   320 		{

   321 			$this->datas[] =& $this->data;

   322 			$this->data =& $this->data['child'][end($this->namespace)][end($this->element)][];

   323 			$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));

   324 			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')

   325 			|| (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')

   326 			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_20 && in_array(end($this->element), array('title')))

   327 			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_090 && in_array(end($this->element), array('title')))

   328 			|| (end($this->namespace) === SIMPLEPIE_NAMESPACE_RSS_10 && in_array(end($this->element), array('title'))))

   329 			{

   330 				$this->current_xhtml_construct = 0;

   331 			}

   332 		}

   333 	}

   334 

   335 	public function cdata($parser, $cdata)

   336 	{

   337 		if ($this->current_xhtml_construct >= 0)

   338 		{

   339 			$this->data['data'] .= htmlspecialchars($cdata, ENT_QUOTES, $this->encoding);

   340 		}

   341 		else

   342 		{

   343 			$this->data['data'] .= $cdata;

   344 		}

   345 	}

   346 

   347 	public function tag_close($parser, $tag)

   348 	{

   349 		if ($this->current_xhtml_construct >= 0)

   350 		{

   351 			$this->current_xhtml_construct--;

   352 			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')))

   353 			{

   354 				$this->data['data'] .= '</' . end($this->element) . '>';

   355 			}

   356 		}

   357 		if ($this->current_xhtml_construct === -1)

   358 		{

   359 			$this->data =& $this->datas[count($this->datas) - 1];

   360 			array_pop($this->datas);

   361 		}

   362 

   363 		array_pop($this->element);

   364 		array_pop($this->namespace);

   365 		array_pop($this->xml_base);

   366 		array_pop($this->xml_base_explicit);

   367 		array_pop($this->xml_lang);

   368 	}

   369 

   370 	public function split_ns($string)

   371 	{

   372 		static $cache = array();

   373 		if (!isset($cache[$string]))

   374 		{

   375 			if ($pos = strpos($string, $this->separator))

   376 			{

   377 				static $separator_length;

   378 				if (!$separator_length)

   379 				{

   380 					$separator_length = strlen($this->separator);

   381 				}

   382 				$namespace = substr($string, 0, $pos);

   383 				$local_name = substr($string, $pos + $separator_length);

   384 				if (strtolower($namespace) === SIMPLEPIE_NAMESPACE_ITUNES)

   385 				{

   386 					$namespace = SIMPLEPIE_NAMESPACE_ITUNES;

   387 				}

   388 

   389 				// Normalize the Media RSS namespaces

   390 				if ($namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG ||

   391 					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG2 ||

   392 					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG3 ||

   393 					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG4 ||

   394 					$namespace === SIMPLEPIE_NAMESPACE_MEDIARSS_WRONG5 )

   395 				{

   396 					$namespace = SIMPLEPIE_NAMESPACE_MEDIARSS;

   397 				}

   398 				$cache[$string] = array($namespace, $local_name);

   399 			}

   400 			else

   401 			{

   402 				$cache[$string] = array('', $string);

   403 			}

   404 		}

   405 		return $cache[$string];

   406 	}

   407 }