<?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';
}
}