simplepie.inc.php

	 * Input data length (to avoid calling strlen() everytime this is needed)
	 *
	 * @access private
	 * @var int
	 */
	var $data_length = 0;

	/**
	 * Current position of the pointer
	 *
	 * @var int
	 * @access private
	 */
	var $position = 0;

	/**
	 * Name of the hedaer currently being parsed
	 *
	 * @access private
	 * @var string
	 */
	var $name = '';

	/**
	 * Value of the hedaer currently being parsed
	 *
	 * @access private
	 * @var string
	 */
	var $value = '';


	/**
	 * Create an instance of the class with the input data
	 *
	 * @access public
	 * @param string $data Input data
	 */
	function SimplePie_HTTP_Parser($data)
	{
		$this->data = $data;
		$this->data_length = strlen($this->data);
	}


	/**
	 * Parse the input data
	 *
	 * @access public
	 * @return bool true on success, false on failure
	 */
	function parse()
	{
		while ($this->state && $this->state !== 'emit' && $this->has_data())
		{
			$state = $this->state;
			$this->$state();
		}
		$this->data = '';
		if ($this->state === 'emit' || $this->state === 'body')
		{
			return true;
		}
		else
		{
			$this->http_version = '';
			$this->status_code = '';
			$this->reason = '';
			$this->headers = array();
			$this->body = '';
			return false;
		}
	}


	/**
	 * Check whether there is data beyond the pointer
	 *
	 * @access private
	 * @return bool true if there is further data, false if not
	 */
	function has_data()
	{
		return (bool) ($this->position < $this->data_length);
	}


	/**
	 * See if the next character is LWS
	 *
	 * @access private
	 * @return bool true if the next character is LWS, false if not
	 */
	function is_linear_whitespace()
	{
		return (bool) ($this->data[$this->position] === "\x09"
			|| $this->data[$this->position] === "\x20"
			|| ($this->data[$this->position] === "\x0A"
				&& isset($this->data[$this->position + 1])
				&& ($this->data[$this->position + 1] === "\x09" || $this->data[$this->position + 1] === "\x20")));
	}


	/**
	 * Parse the HTTP version
	 *
	 * @access private
	 */
	function http_version()
	{
		if (strpos($this->data, "\x0A") !== false && strtoupper(substr($this->data, 0, 5)) === 'HTTP/')
		{
			$len = strspn($this->data, '0123456789.', 5);
			$this->http_version = substr($this->data, 5, $len);
			$this->position += 5 + $len;
			if (substr_count($this->http_version, '.') <= 1)
			{
				$this->http_version = (float) $this->http_version;
				$this->position += strspn($this->data, "\x09\x20", $this->position);
				$this->state = 'status';
			}
			else
			{
				$this->state = false;
			}
		}
		else
		{
			$this->state = false;
		}
	}


	/**
	 * Parse the status code
	 *
	 * @access private
	 */
	function status()
	{
		if ($len = strspn($this->data, '0123456789', $this->position))
		{
			$this->status_code = (int) substr($this->data, $this->position, $len);
			$this->position += $len;
			$this->state = 'reason';
		}
		else
		{
			$this->state = false;
		}
	}


	/**
	 * Parse the reason phrase
	 *
	 * @access private
	 */
	function reason()
	{
		$len = strcspn($this->data, "\x0A", $this->position);
		$this->reason = trim(substr($this->data, $this->position, $len), "\x09\x0D\x20");
		$this->position += $len + 1;
		$this->state = 'new_line';
	}


	/**
	 * Deal with a new line, shifting data around as needed
	 *
	 * @access private
	 */
	function new_line()
	{
		$this->value = trim($this->value, "\x0D\x20");
		if ($this->name !== '' && $this->value !== '')
		{
			$this->name = strtolower($this->name);
			if (isset($this->headers[$this->name]))
			{
				$this->headers[$this->name] .= ', ' . $this->value;
			}
			else
			{
				$this->headers[$this->name] = $this->value;
			}
		}
		$this->name = '';
		$this->value = '';
		if (substr($this->data[$this->position], 0, 2) === "\x0D\x0A")
		{
			$this->position += 2;
			$this->state = 'body';
		}
		elseif ($this->data[$this->position] === "\x0A")
		{
			$this->position++;
			$this->state = 'body';
		}
		else
		{
			$this->state = 'name';
		}
	}


	/**
	 * Parse a header name
	 *
	 * @access private
	 */
	function name()
	{
		$len = strcspn($this->data, "\x0A:", $this->position);
		if (isset($this->data[$this->position + $len]))
		{
			if ($this->data[$this->position + $len] === "\x0A")
			{
				$this->position += $len;
				$this->state = 'new_line';
			}
			else
			{
				$this->name = substr($this->data, $this->position, $len);
				$this->position += $len + 1;
				$this->state = 'value';
			}
		}
		else
		{
			$this->state = false;
		}
	}


	/**
	 * Parse LWS, replacing consecutive LWS characters with a single space
	 *
	 * @access private
	 */
	function linear_whitespace()
	{
		do
		{
			if (substr($this->data, $this->position, 2) === "\x0D\x0A")
			{
				$this->position += 2;
			}
			elseif ($this->data[$this->position] === "\x0A")
			{
				$this->position++;
			}
			$this->position += strspn($this->data, "\x09\x20", $this->position);
		} while ($this->has_data() && $this->is_linear_whitespace());
		$this->value .= "\x20";
	}


	/**
	 * See what state to move to while within non-quoted header values
	 *
	 * @access private
	 */
	function value()
	{
		if ($this->is_linear_whitespace())
		{
			$this->linear_whitespace();
		}
		else
		{
			switch ($this->data[$this->position])
			{
			case '"':
				$this->position++;
				$this->state = 'quote';
				break;

			case "\x0A":
				$this->position++;
				$this->state = 'new_line';
				break;

			default:
				$this->state = 'value_char';
				break;
			}
		}
	}


	/**
	 * Parse a header value while outside quotes
	 *
	 * @access private
	 */
	function value_char()
	{
		$len = strcspn($this->data, "\x09\x20\x0A\"", $this->position);
		$this->value .= substr($this->data, $this->position, $len);
		$this->position += $len;
		$this->state = 'value';
	}


	/**
	 * See what state to move to while within quoted header values
	 *
	 * @access private
	 */
	function quote()
	{
		if ($this->is_linear_whitespace())
		{
			$this->linear_whitespace();
		}
		else
		{
			switch ($this->data[$this->position])
			{
			case '"':
				$this->position++;
				$this->state = 'value';
				break;

			case "\x0A":
				$this->position++;
				$this->state = 'new_line';
				break;

			case '\\':
				$this->position++;
				$this->state = 'quote_escaped';
				break;

			default:
				$this->state = 'quote_char';
				break;
			}
		}
	}


	/**
	 * Parse a header value while within quotes
	 *
	 * @access private
	 */
	function quote_char()
	{
		$len = strcspn($this->data, "\x09\x20\x0A\"\\", $this->position);
		$this->value .= substr($this->data, $this->position, $len);
		$this->position += $len;
		$this->state = 'value';
	}


	/**
	 * Parse an escaped character within quotes
	 *
	 * @access private
	 */
	function quote_escaped()
	{
		$this->value .= $this->data[$this->position];
		$this->position++;
		$this->state = 'quote';
	}


	/**
	 * Parse the body
	 *
	 * @access private
	 */
	function body()
	{
		$this->body = substr($this->data, $this->position);
		$this->state = 'emit';
	}

}

/**
 * gzdecode
 *
 * @package SimplePie
 */
class SimplePie_gzdecode
{

	/**
	 * Compressed data
	 *
	 * @access private
	 * @see gzdecode::$data
	 */
	var $compressed_data;

	/**
	 * Size of compressed data
	 *
	 * @access private
	 */
	var $compressed_size;

	/**
	 * Minimum size of a valid gzip string
	 *
	 * @access private
	 */
	var $min_compressed_size = 18;

	/**
	 * Current position of pointer
	 *
	 * @access private
	 */
	var $position = 0;

	/**
	 * Flags (FLG)
	 *
	 * @access private
	 */
	var $flags;

	/**
	 * Uncompressed data
	 *
	 * @access public
	 * @see gzdecode::$compressed_data
	 */
	var $data;

	/**
	 * Modified time
	 *
	 * @access public
	 */
	var $MTIME;

	/**
	 * Extra Flags
	 *
	 * @access public
	 */
	var $XFL;

	/**
	 * Operating System
	 *
	 * @access public
	 */
	var $OS;

	/**
	 * Subfield ID 1
	 *
	 * @access public
	 * @see gzdecode::$extra_field
	 * @see gzdecode::$SI2
	 */
	var $SI1;

	/**
	 * Subfield ID 2
	 *
	 * @access public
	 * @see gzdecode::$extra_field
	 * @see gzdecode::$SI1
	 */
	var $SI2;

	/**
	 * Extra field content
	 *
	 * @access public
	 * @see gzdecode::$SI1
	 * @see gzdecode::$SI2
	 */
	var $extra_field;

	/**
	 * Original filename
	 *
	 * @access public
	 */
	var $filename;

	/**
	 * Human readable comment
	 *
	 * @access public
	 */
	var $comment;


	/**
	 * Don't allow anything to be set
	 *
	 * @access public
	 */
	function __set($name, $value)
	{
		trigger_error("Cannot write property $name", E_USER_ERROR);
	}


	/**
	 * Set the compressed string and related properties
	 *
	 * @access public
	 */
	function SimplePie_gzdecode($data)
	{
		$this->compressed_data = $data;
		$this->compressed_size = strlen($data);
	}


	/**
	 * Decode the GZIP stream
	 *
	 * @access public
	 */
	function parse()
	{
		if ($this->compressed_size >= $this->min_compressed_size)
		{
			// Check ID1, ID2, and CM
			if (substr($this->compressed_data, 0, 3) !== "\x1F\x8B\x08")
			{
				return false;
			}

			// Get the FLG (FLaGs)
			$this->flags = ord($this->compressed_data[3]);

			// FLG bits above (1 << 4) are reserved
			if ($this->flags > 0x1F)
			{
				return false;
			}

			// Advance the pointer after the above
			$this->position += 4;

			// MTIME
			$mtime = substr($this->compressed_data, $this->position, 4);
			// Reverse the string if we're on a big-endian arch because l is the only signed long and is machine endianness
			if (current(unpack('S', "\x00\x01")) === 1)
			{
				$mtime = strrev($mtime);
			}
			$this->MTIME = current(unpack('l', $mtime));
			$this->position += 4;

			// Get the XFL (eXtra FLags)
			$this->XFL = ord($this->compressed_data[$this->position++]);

			// Get the OS (Operating System)
			$this->OS = ord($this->compressed_data[$this->position++]);

			// Parse the FEXTRA
			if ($this->flags & 4)
			{
				// Read subfield IDs
				$this->SI1 = $this->compressed_data[$this->position++];
				$this->SI2 = $this->compressed_data[$this->position++];

				// SI2 set to zero is reserved for future use
				if ($this->SI2 === "\x00")
				{
					return false;
				}

				// Get the length of the extra field
				$len = current(unpack('v', substr($this->compressed_data, $this->position, 2)));
				$position += 2;

				// Check the length of the string is still valid
				$this->min_compressed_size += $len + 4;
				if ($this->compressed_size >= $this->min_compressed_size)
				{
					// Set the extra field to the given data
					$this->extra_field = substr($this->compressed_data, $this->position, $len);
					$this->position += $len;
				}
				else
				{
					return false;
				}
			}

			// Parse the FNAME
			if ($this->flags & 8)
			{
				// Get the length of the filename
				$len = strcspn($this->compressed_data, "\x00", $this->position);

				// Check the length of the string is still valid
				$this->min_compressed_size += $len + 1;
				if ($this->compressed_size >= $this->min_compressed_size)
				{
					// Set the original filename to the given string
					$this->filename = substr($this->compressed_data, $this->position, $len);
					$this->position += $len + 1;
				}
				else
				{
					return false;
				}
			}

			// Parse the FCOMMENT
			if ($this->flags & 16)
			{
				// Get the length of the comment
				$len = strcspn($this->compressed_data, "\x00", $this->position);

				// Check the length of the string is still valid
				$this->min_compressed_size += $len + 1;
				if ($this->compressed_size >= $this->min_compressed_size)
				{
					// Set the original comment to the given string
					$this->comment = substr($this->compressed_data, $this->position, $len);
					$this->position += $len + 1;
				}
				else
				{
					return false;
				}
			}

			// Parse the FHCRC
			if ($this->flags & 2)
			{
				// Check the length of the string is still valid
				$this->min_compressed_size += $len + 2;
				if ($this->compressed_size >= $this->min_compressed_size)
				{
					// Read the CRC
					$crc = current(unpack('v', substr($this->compressed_data, $this->position, 2)));

					// Check the CRC matches
					if ((crc32(substr($this->compressed_data, 0, $this->position)) & 0xFFFF) === $crc)
					{
						$this->position += 2;
					}
					else
					{
						return false;
					}
				}
				else
				{
					return false;
				}
			}

			// Decompress the actual data
			if (($this->data = gzinflate(substr($this->compressed_data, $this->position, -8))) === false)
			{
				return false;
			}
			else
			{
				$this->position = $this->compressed_size - 8;
			}

			// Check CRC of data
			$crc = current(unpack('V', substr($this->compressed_data, $this->position, 4)));
			$this->position += 4;
			/*if (extension_loaded('hash') && sprintf('%u', current(unpack('V', hash('crc32b', $this->data)))) !== sprintf('%u', $crc))
			{
				return false;
			}*/

			// Check ISIZE of data
			$isize = current(unpack('V', substr($this->compressed_data, $this->position, 4)));
			$this->position += 4;
			if (sprintf('%u', strlen($this->data) & 0xFFFFFFFF) !== sprintf('%u', $isize))
			{
				return false;
			}

			// Wow, against all odds, we've actually got a valid gzip string
			return true;
		}
		else
		{
			return false;
		}
	}

}

class SimplePie_Cache
{


	/**
	 * Don't call the constructor. Please.
	 *
	 * @access private
	 */
	function SimplePie_Cache()
	{
		trigger_error('Please call SimplePie_Cache::create() instead of the constructor', E_USER_ERROR);
	}


	/**
	 * Create a new SimplePie_Cache object
	 *
	 * @static
	 * @access public
	 */
	function create($location, $filename, $extension)
	{
		$location_iri = new SimplePie_IRI($location);
		switch ($location_iri->get_scheme())
		{
		case 'mysql':
			if (extension_loaded('mysql'))
			{
				return new SimplePie_Cache_MySQL($location_iri, $filename, $extension);
			}
			break;

		default:
			return new SimplePie_Cache_File($location, $filename, $extension);
		}
	}

}

class SimplePie_Cache_File
{
	var $location;
	var $filename;
	var $extension;
	var $name;

	function SimplePie_Cache_File($location, $filename, $extension)
	{
		$this->location = $location;
		$this->filename = $filename;
		$this->extension = $extension;
		$this->name = "$this->location/$this->filename.$this->extension";
	}

	function save($data)
	{
		if (file_exists($this->name) && is_writeable($this->name) || file_exists($this->location) && is_writeable($this->location))
		{
			if (is_a($data, 'SimplePie'))
			{
				$data = $data->data;
			}

			$data = serialize($data);

			if (function_exists('file_put_contents'))
			{
				return (bool) file_put_contents($this->name, $data);
			}
			else
			{
				$fp = fopen($this->name, 'wb');
				if ($fp)
				{
					fwrite($fp, $data);
					fclose($fp);
					return true;
				}
			}
		}
		return false;
	}

	function load()
	{
		if (file_exists($this->name) && is_readable($this->name))
		{
			return unserialize(file_get_contents($this->name));
		}
		return false;
	}

	function mtime()
	{
		if (file_exists($this->name))
		{
			return filemtime($this->name);
		}
		return false;
	}

	function touch()
	{
		if (file_exists($this->name))
		{
			return touch($this->name);
		}
		return false;
	}

	function unlink()
	{
		if (file_exists($this->name))
		{
			return unlink($this->name);
		}
		return false;
	}

}

class SimplePie_Cache_DB
{
	function prepare_simplepie_object_for_cache($data)
	{
		$items = $data->get_items();
		$items_by_id = array();

		if (!empty($items))
		{
			foreach ($items as $item)
			{
				$items_by_id[$item->get_id()] = $item;
			}

			if (count($items_by_id) !== count($items))
			{
				$items_by_id = array();
				foreach ($items as $item)
				{
					$items_by_id[$item->get_id(true)] = $item;
				}
			}

			if (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
			}
			elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
			}
			elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
			}
			elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0]))
			{
				$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0];
			}
			else
			{
				$channel = null;
			}

			if ($channel !== null)
			{
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']);
				}
				if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']))
				{
					unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']);
				}
			}
			if (isset($data->data['items']))
			{
				unset($data->data['items']);
			}
			if (isset($data->data['ordered_items']))
			{
				unset($data->data['ordered_items']);
			}
		}
		return array(serialize($data->data), $items_by_id);
	}

}

class SimplePie_Cache_MySQL extends SimplePie_Cache_DB
{
	var $mysql;
	var $options;
	var $id;

	function SimplePie_Cache_MySQL($mysql_location, $name, $extension)
	{
		$host = $mysql_location->get_host();
		if (SimplePie_Misc::stripos($host, 'unix(') === 0 && substr($host, -1) === ')')
		{
			$server = ':' . substr($host, 5, -1);
		}
		else
		{
			$server = $host;
			if ($mysql_location->get_port() !== null)
			{
				$server .= ':' . $mysql_location->get_port();
			}
		}

		if (strpos($mysql_location->get_userinfo(), ':') !== false)
		{
			list($username, $password) = explode(':', $mysql_location->get_userinfo(), 2);
		}
		else
		{
			$username = $mysql_location->get_userinfo();
			$password = null;
		}

		if ($this->mysql = mysql_connect($server, $username, $password))
		{
			$this->id = $name . $extension;
			$this->options = SimplePie_Misc::parse_str($mysql_location->get_query());
			if (!isset($this->options['prefix'][0]))
			{
				$this->options['prefix'][0] = '';
			}

			if (mysql_select_db(ltrim($mysql_location->get_path(), '/'))
				&& mysql_query('SET NAMES utf8')
				&& ($query = mysql_unbuffered_query('SHOW TABLES')))
			{
				$db = array();
				while ($row = mysql_fetch_row($query))
				{
					$db[] = $row[0];
				}

				if (!in_array($this->options['prefix'][0] . 'cache_data', $db))
				{
					if (!mysql_query('CREATE TABLE `' . $this->options['prefix'][0] . 'cache_data` (`id` TEXT CHARACTER SET utf8 NOT NULL, `items` SMALLINT NOT NULL DEFAULT 0, `data` BLOB NOT NULL, `mtime` INT UNSIGNED NOT NULL, UNIQUE (`id`(125)))'))
					{
						$this->mysql = null;
					}
				}

				if (!in_array($this->options['prefix'][0] . 'items', $db))
				{
					if (!mysql_query('CREATE TABLE `' . $this->options['prefix'][0] . 'items` (`feed_id` TEXT CHARACTER SET utf8 NOT NULL, `id` TEXT CHARACTER SET utf8 NOT NULL, `data` TEXT CHARACTER SET utf8 NOT NULL, `posted` INT UNSIGNED NOT NULL, INDEX `feed_id` (`feed_id`(125)))'))
					{
						$this->mysql = null;
					}
				}
			}
			else
			{
				$this->mysql = null;
			}
		}
	}

	function save($data)
	{
		if ($this->mysql)
		{
			$feed_id = "'" . mysql_real_escape_string($this->id) . "'";

			if (is_a($data, 'SimplePie'))
			{
				if (SIMPLEPIE_PHP5)
				{
					// This keyword needs to defy coding standards for PHP4 compatibility
					$data = clone($data);
				}

				$prepared = $this->prepare_simplepie_object_for_cache($data);

				if ($query = mysql_query('SELECT `id` FROM `' . $this->options['prefix'][0] . 'cache_data` WHERE `id` = ' . $feed_id, $this->mysql))
				{
					if (mysql_num_rows($query))
					{
						$items = count($prepared[1]);
						if ($items)
						{
							$sql = 'UPDATE `' . $this->options['prefix'][0] . 'cache_data` SET `items` = ' . $items . ', `data` = \'' . mysql_real_escape_string($prepared[0]) . '\', `mtime` = ' . time() . ' WHERE `id` = ' . $feed_id;
						}