<?php

> 
/**
> declare(strict_types=1);


 * SimplePie
 *
 * A PHP-Based RSS and Atom Feed Framework.
 * Takes the hard work out of managing a complete RSS/Atom solution.
 *

<  * Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors



>  * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors


 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 	* Redistributions of source code must retain the above copyright notice, this list of
 * 	  conditions and the following disclaimer.
 *
 * 	* Redistributions in binary form must reproduce the above copyright notice, this list
 * 	  of conditions and the following disclaimer in the documentation and/or other materials
 * 	  provided with the distribution.
 *
 * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used
 * 	  to endorse or promote products derived from this software without specific prior
 * 	  written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package SimplePie
 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
 * @author Ryan Parman
 * @author Sam Sneddon
 * @author Ryan McCue
 * @link http://simplepie.org/ SimplePie
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 */


> use SimplePie\HTTP\Parser;




< /**
<  * HTTP Response Parser
<  *
<  * @package SimplePie
<  * @subpackage HTTP
<  */
< class SimplePie_HTTP_Parser
< {
< 	/**
< 	 * HTTP Version
< 	 *
< 	 * @var float
< 	 */
< 	public $http_version = 0.0;
< 
< 	/**
< 	 * Status code
< 	 *
< 	 * @var int
< 	 */
< 	public $status_code = 0;
< 
< 	/**
< 	 * Reason phrase
< 	 *
< 	 * @var string
< 	 */
< 	public $reason = '';
< 
< 	/**
< 	 * Key/value pairs of the headers
< 	 *
< 	 * @var array
< 	 */
< 	public $headers = array();
< 
< 	/**
< 	 * Body of the response
< 	 *
< 	 * @var string
< 	 */
< 	public $body = '';
< 
< 	/**
< 	 * Current state of the state machine
< 	 *
< 	 * @var string
< 	 */
< 	protected $state = 'http_version';
< 
< 	/**
< 	 * Input data
< 	 *
< 	 * @var string
< 	 */
< 	protected $data = '';
< 
< 	/**
< 	 * Input data length (to avoid calling strlen() everytime this is needed)
< 	 *
< 	 * @var int
< 	 */
< 	protected $data_length = 0;
< 
< 	/**
< 	 * Current position of the pointer
< 	 *
< 	 * @var int
< 	 */
< 	protected $position = 0;
< 
< 	/**
< 	 * Name of the hedaer currently being parsed
< 	 *
< 	 * @var string
< 	 */
< 	protected $name = '';
< 
< 	/**
< 	 * Value of the hedaer currently being parsed
< 	 *
< 	 * @var string
< 	 */
< 	protected $value = '';
< 
< 	/**
< 	 * Create an instance of the class with the input data
< 	 *
< 	 * @param string $data Input data
< 	 */
< 	public function __construct($data)
< 	{
< 		$this->data = $data;
< 		$this->data_length = strlen($this->data);
< 	}
< 
< 	/**
< 	 * Parse the input data
< 	 *
< 	 * @return bool true on success, false on failure
< 	 */
< 	public 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;
< 		}
< 
< 		$this->http_version = '';
< 		$this->status_code = '';
< 		$this->reason = '';
< 		$this->headers = array();
< 		$this->body = '';
< 		return false;
< 	}
< 
< 	/**
< 	 * Check whether there is data beyond the pointer
< 	 *
< 	 * @return bool true if there is further data, false if not
< 	 */
< 	protected function has_data()
< 	{
< 		return (bool) ($this->position < $this->data_length);
< 	}
< 
< 	/**
< 	 * See if the next character is LWS
< 	 *
< 	 * @return bool true if the next character is LWS, false if not
< 	 */
< 	protected function is_linear_whitespace()
< 	{
< 		return (bool) ($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
< 	 */
< 	protected 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
< 		{
< 			$this->state = false;
< 		}
< 	}
< 
< 	/**
< 	 * Parse the status code
< 	 */
< 	protected function status()
< 	{
< 		if ($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;
< 		}
< 	}



> class_exists('SimplePie\HTTP\Parser');




< 	/**
< 	 * Parse the reason phrase
< 	 */
< 	protected 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';
< 	}



> // @trigger_error(sprintf('Using the "SimplePie_HTTP_Parser" class is deprecated since SimplePie 1.7.0, use "SimplePie\HTTP\Parser" instead.'), \E_USER_DEPRECATED);




< 	/**
< 	 * Deal with a new line, shifting data around as needed
< 	 */
< 	protected function new_line()
< 	{
< 		$this->value = trim($this->value, "\x0D\x20");
< 		if ($this->name !== '' && $this->value !== '')



> if (\false) {
>     /** @deprecated since SimplePie 1.7.0, use "SimplePie\HTTP\Parser" instead */
>     class SimplePie_HTTP_Parser extends Parser


		{

< 			$this->name = strtolower($this->name);
< 			// We should only use the last Content-Type header. c.f. issue #1
< 			if (isset($this->headers[$this->name]) && $this->name !== 'content-type')
< 			{
< 				$this->headers[$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
< 	 */
< 	protected 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
< 		{
< 			$this->state = false;
< 		}
< 	}
< 
< 	/**
< 	 * Parse LWS, replacing consecutive LWS characters with a single space
< 	 */
< 	protected function linear_whitespace()
< 	{
< 		do
< 		{
< 			if (substr($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());
< 		$this->value .= "\x20";
< 	}
< 
< 	/**
< 	 * See what state to move to while within non-quoted header values
< 	 */
< 	protected function value()
< 	{
< 		if ($this->is_linear_whitespace())
< 		{
< 			$this->linear_whitespace();
< 		}
< 		else
< 		{
< 			switch ($this->data[$this->position])
< 			{
< 				case '"':
< 					// Workaround for ETags: we have to include the quotes as
< 					// part of the tag.
< 					if (strtolower($this->name) === 'etag')
< 					{
< 						$this->value .= '"';
< 						$this->position++;
< 						$this->state = 'value_char';
< 						break;
< 					}
< 					$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
< 	 */
< 	protected function value_char()
< 	{
< 		$len = strcspn($this->data, "\x09\x20\x0A\"", $this->position);
< 		$this->value .= substr($this->data, $this->position, $len);
< 		$this->position += $len;
< 		$this->state = 'value';
< 	}
< 
< 	/**
< 	 * See what state to move to while within quoted header values
< 	 */
< 	protected function quote()
< 	{
< 		if ($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
< 	 */
< 	protected 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
< 	 */
< 	protected function quote_escaped()
< 	{
< 		$this->value .= $this->data[$this->position];
< 		$this->position++;
< 		$this->state = 'quote';
< 	}
< 
< 	/**
< 	 * Parse the body
< 	 */
< 	protected function body()
< 	{
< 		$this->body = substr($this->data, $this->position);
< 		if (!empty($this->headers['transfer-encoding']))
< 		{
< 			unset($this->headers['transfer-encoding']);
< 			$this->state = 'chunked';
< 		}
< 		else
< 		{
< 			$this->state = 'emit';
< 		}
< 	}
< 
< 	/**
< 	 * Parsed a "Transfer-Encoding: chunked" body
< 	 */
< 	protected function chunked()
< 	{
< 		if (!preg_match('/^([0-9a-f]+)[^\r\n]*\r\n/i', trim($this->body)))
< 		{
< 			$this->state = 'emit';
< 			return;
< 		}
< 
< 		$decoded = '';
< 		$encoded = $this->body;
< 
< 		while (true)
< 		{
< 			$is_chunked = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $encoded, $matches );
< 			if (!$is_chunked)
< 			{
< 				// Looks like it's not chunked after all
< 				$this->state = 'emit';
< 				return;
< 			}
< 
< 			$length = hexdec(trim($matches[1]));
< 			if ($length === 0)
< 			{
< 				// Ignore trailer headers
< 				$this->state = 'emit';
< 				$this->body = $decoded;
< 				return;
< 			}
< 
< 			$chunk_length = strlen($matches[0]);
< 			$decoded .= $part = substr($encoded, $chunk_length, $length);
< 			$encoded = substr($encoded, $chunk_length + $length + 2);
< 
< 			if (trim($encoded) === '0' || empty($encoded))
< 			{
< 				$this->state = 'emit';
< 				$this->body = $decoded;
< 				return;
< 			}
< 		}
< 	}
< 
< 	/**
< 	 * Prepare headers (take care of proxies headers)
< 	 *
< 	 * @param string  $headers Raw headers
< 	 * @param integer $count   Redirection count. Default to 1.
< 	 *
< 	 * @return string
< 	 */
< 	static public function prepareHeaders($headers, $count = 1)
< 	{
< 		$data = explode("\r\n\r\n", $headers, $count);
< 		$data = array_pop($data);
< 		if (false !== stripos($data, "HTTP/1.0 200 Connection established\r\n\r\n")) {
< 			$data = str_ireplace("HTTP/1.0 200 Connection established\r\n\r\n", '', $data);
< 		}
< 		if (false !== stripos($data, "HTTP/1.1 200 Connection established\r\n\r\n")) {
< 			$data = str_ireplace("HTTP/1.1 200 Connection established\r\n\r\n", '', $data);
< 		}
< 		return $data;


	}
}