<?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, Geoffrey 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, Geoffrey Sneddon, Ryan McCue



>  * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue


 * @author Ryan Parman

<  * @author Geoffrey Sneddon



>  * @author Sam Sneddon


 * @author Ryan McCue
 * @link http://simplepie.org/ SimplePie
 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
 */


> use SimplePie\Content\Type\Sniffer;




< /**
<  * Content-type sniffing
<  *
<  * Based on the rules in http://tools.ietf.org/html/draft-abarth-mime-sniff-06
<  *
<  * This is used since we can't always trust Content-Type headers, and is based
<  * upon the HTML5 parsing rules.
<  *
<  *
<  * This class can be overloaded with {@see SimplePie::set_content_type_sniffer_class()}
<  *
<  * @package SimplePie
<  * @subpackage HTTP
<  */
< class SimplePie_Content_Type_Sniffer
< {
< 	/**
< 	 * File object
< 	 *
< 	 * @var SimplePie_File
< 	 */
< 	var $file;
< 
< 	/**
< 	 * Create an instance of the class with the input file
< 	 *
< 	 * @param SimplePie_Content_Type_Sniffer $file Input file
< 	 */
< 	public function __construct($file)
< 	{
< 		$this->file = $file;
< 	}
< 
< 	/**
< 	 * Get the Content-Type of the specified file
< 	 *
< 	 * @return string Actual Content-Type
< 	 */
< 	public function get_type()
< 	{
< 		if (isset($this->file->headers['content-type']))
< 		{
< 			if (!isset($this->file->headers['content-encoding'])
< 				&& ($this->file->headers['content-type'] === 'text/plain'
< 					|| $this->file->headers['content-type'] === 'text/plain; charset=ISO-8859-1'
< 					|| $this->file->headers['content-type'] === 'text/plain; charset=iso-8859-1'
< 					|| $this->file->headers['content-type'] === 'text/plain; charset=UTF-8'))
< 			{
< 				return $this->text_or_binary();
< 			}
< 
< 			if (($pos = strpos($this->file->headers['content-type'], ';')) !== false)
< 			{
< 				$official = substr($this->file->headers['content-type'], 0, $pos);
< 			}
< 			else
< 			{
< 				$official = $this->file->headers['content-type'];
< 			}
< 			$official = trim(strtolower($official));
< 
< 			if ($official === 'unknown/unknown'
< 				|| $official === 'application/unknown')
< 			{
< 				return $this->unknown();
< 			}
< 			elseif (substr($official, -4) === '+xml'
< 				|| $official === 'text/xml'
< 				|| $official === 'application/xml')
< 			{
< 				return $official;
< 			}
< 			elseif (substr($official, 0, 6) === 'image/')
< 			{
< 				if ($return = $this->image())
< 				{
< 					return $return;
< 				}
< 
< 				return $official;
< 			}
< 			elseif ($official === 'text/html')
< 			{
< 				return $this->feed_or_html();
< 			}
< 
< 			return $official;
< 		}
< 
< 		return $this->unknown();
< 	}
< 
< 	/**
< 	 * Sniff text or binary
< 	 *
< 	 * @return string Actual Content-Type
< 	 */
< 	public function text_or_binary()
< 	{
< 		if (substr($this->file->body, 0, 2) === "\xFE\xFF"
< 			|| substr($this->file->body, 0, 2) === "\xFF\xFE"
< 			|| substr($this->file->body, 0, 4) === "\x00\x00\xFE\xFF"
< 			|| substr($this->file->body, 0, 3) === "\xEF\xBB\xBF")
< 		{
< 			return 'text/plain';
< 		}
< 		elseif (preg_match('/[\x00-\x08\x0E-\x1A\x1C-\x1F]/', $this->file->body))
< 		{
< 			return 'application/octect-stream';
< 		}
< 
< 		return 'text/plain';
< 	}
< 
< 	/**
< 	 * Sniff unknown
< 	 *
< 	 * @return string Actual Content-Type
< 	 */
< 	public function unknown()
< 	{
< 		$ws = strspn($this->file->body, "\x09\x0A\x0B\x0C\x0D\x20");
< 		if (strtolower(substr($this->file->body, $ws, 14)) === '<!doctype html'
< 			|| strtolower(substr($this->file->body, $ws, 5)) === '<html'
< 			|| strtolower(substr($this->file->body, $ws, 7)) === '<script')
< 		{
< 			return 'text/html';
< 		}
< 		elseif (substr($this->file->body, 0, 5) === '%PDF-')
< 		{
< 			return 'application/pdf';
< 		}
< 		elseif (substr($this->file->body, 0, 11) === '%!PS-Adobe-')
< 		{
< 			return 'application/postscript';
< 		}
< 		elseif (substr($this->file->body, 0, 6) === 'GIF87a'
< 			|| substr($this->file->body, 0, 6) === 'GIF89a')
< 		{
< 			return 'image/gif';
< 		}
< 		elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")
< 		{
< 			return 'image/png';
< 		}
< 		elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF")
< 		{
< 			return 'image/jpeg';
< 		}
< 		elseif (substr($this->file->body, 0, 2) === "\x42\x4D")
< 		{
< 			return 'image/bmp';
< 		}
< 		elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00")
< 		{
< 			return 'image/vnd.microsoft.icon';
< 		}
< 
< 		return $this->text_or_binary();
< 	}
< 
< 	/**
< 	 * Sniff images
< 	 *
< 	 * @return string Actual Content-Type
< 	 */
< 	public function image()
< 	{
< 		if (substr($this->file->body, 0, 6) === 'GIF87a'
< 			|| substr($this->file->body, 0, 6) === 'GIF89a')
< 		{
< 			return 'image/gif';
< 		}
< 		elseif (substr($this->file->body, 0, 8) === "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A")
< 		{
< 			return 'image/png';
< 		}
< 		elseif (substr($this->file->body, 0, 3) === "\xFF\xD8\xFF")
< 		{
< 			return 'image/jpeg';
< 		}
< 		elseif (substr($this->file->body, 0, 2) === "\x42\x4D")
< 		{
< 			return 'image/bmp';
< 		}
< 		elseif (substr($this->file->body, 0, 4) === "\x00\x00\x01\x00")
< 		{
< 			return 'image/vnd.microsoft.icon';
< 		}
< 
< 		return false;
< 	}
< 
< 	/**
< 	 * Sniff HTML
< 	 *
< 	 * @return string Actual Content-Type
< 	 */
< 	public function feed_or_html()
< 	{
< 		$len = strlen($this->file->body);
< 		$pos = strspn($this->file->body, "\x09\x0A\x0D\x20\xEF\xBB\xBF");



> class_exists('SimplePie\Content\Type\Sniffer');




< 		while ($pos < $len)
< 		{
< 			switch ($this->file->body[$pos])
< 			{
< 				case "\x09":
< 				case "\x0A":
< 				case "\x0D":
< 				case "\x20":
< 					$pos += strspn($this->file->body, "\x09\x0A\x0D\x20", $pos);
< 					continue 2;



> // @trigger_error(sprintf('Using the "SimplePie_Content_Type_Sniffer" class is deprecated since SimplePie 1.7.0, use "SimplePie\Content\Type\Sniffer" instead.'), \E_USER_DEPRECATED);




< 				case '<':
< 					$pos++;
< 					break;
< 
< 				default:
< 					return 'text/html';
< 			}
< 
< 			if (substr($this->file->body, $pos, 3) === '!--')
< 			{
< 				$pos += 3;
< 				if ($pos < $len && ($pos = strpos($this->file->body, '-->', $pos)) !== false)
< 				{
< 					$pos += 3;
< 				}
< 				else
< 				{
< 					return 'text/html';
< 				}
< 			}
< 			elseif (substr($this->file->body, $pos, 1) === '!')
< 			{
< 				if ($pos < $len && ($pos = strpos($this->file->body, '>', $pos)) !== false)
< 				{
< 					$pos++;
< 				}
< 				else



> if (\false) {
>     /** @deprecated since SimplePie 1.7.0, use "SimplePie\Content\Type\Sniffer" instead */
>     class SimplePie_Content_Type_Sniffer extends Sniffer


				{

< 					return 'text/html';
< 				}
< 			}
< 			elseif (substr($this->file->body, $pos, 1) === '?')
< 			{
< 				if ($pos < $len && ($pos = strpos($this->file->body, '?>', $pos)) !== false)
< 				{
< 					$pos += 2;
< 				}
< 				else
< 				{
< 					return 'text/html';
< 				}
< 			}
< 			elseif (substr($this->file->body, $pos, 3) === 'rss'
< 				|| substr($this->file->body, $pos, 7) === 'rdf:RDF')
< 			{
< 				return 'application/rss+xml';
< 			}
< 			elseif (substr($this->file->body, $pos, 4) === 'feed')
< 			{
< 				return 'application/atom+xml';
< 			}
< 			else
< 			{
< 				return 'text/html';
< 			}
< 		}
< 
< 		return 'text/html';


	}
}