<h2>File Contents: /home/planet5/public_html/wp-includes/SimplePie/src/Content/Type/Sniffer.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/public_html/wp-includes/SimplePie/src/Content/Type/Sniffer.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php

// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
// SPDX-License-Identifier: BSD-3-Clause

declare(strict_types=1);

namespace SimplePie\Content\Type;

use InvalidArgumentException;
use SimplePie\File;
use SimplePie\HTTP\Response;

/**
 * Content-type sniffing
 *
 * Based on the rules in http://tools.ietf.org/html/draft-abarth-mime-sniff-06
 *
 * This is used since we can&#039;t always trust Content-Type headers, and is based
 * upon the HTML5 parsing rules.
 *
 *
 * This class can be overloaded with {@see \SimplePie\SimplePie::set_content_type_sniffer_class()}
 */
class Sniffer
{
    /**
     * File object
     *
     * @var File|Response
     */
    public $file;

    /**
     * Create an instance of the class with the input file
     *
     * @param File|Response $file Input file
     */
    public function __construct(/* File */ $file)
    {
        if (!is_object($file) || !$file instanceof Response) {
            // For BC we&#039;re asking for `File`, but internally we accept every `Response` implementation
            throw new InvalidArgumentException(sprintf(
                &#039;%s(): Argument #1 ($file) must be of type %s&#039;,
                __METHOD__,
                File::class
            ), 1);
        }

        $this-&gt;file = $file;
    }

    /**
     * Get the Content-Type of the specified file
     *
     * @return string Actual Content-Type
     */
    public function get_type()
    {
        $content_type = $this-&gt;file-&gt;has_header(&#039;content-type&#039;) ? $this-&gt;file-&gt;get_header_line(&#039;content-type&#039;) : null;
        $content_encoding = $this-&gt;file-&gt;has_header(&#039;content-encoding&#039;) ? $this-&gt;file-&gt;get_header_line(&#039;content-encoding&#039;) : null;
        if ($content_type !== null) {
            if ($content_encoding === null
                &amp;&amp; ($content_type === &#039;text/plain&#039;
                    || $content_type === &#039;text/plain; charset=ISO-8859-1&#039;
                    || $content_type === &#039;text/plain; charset=iso-8859-1&#039;
                    || $content_type === &#039;text/plain; charset=UTF-8&#039;)) {
                return $this-&gt;text_or_binary();
            }

            if (($pos = strpos($content_type, &#039;;&#039;)) !== false) {
                $official = substr($content_type, 0, $pos);
            } else {
                $official = $content_type;
            }
            $official = trim(strtolower($official));

            if ($official === &#039;unknown/unknown&#039;
                || $official === &#039;application/unknown&#039;) {
                return $this-&gt;unknown();
            } elseif (substr($official, -4) === &#039;+xml&#039;
                || $official === &#039;text/xml&#039;
                || $official === &#039;application/xml&#039;) {
                return $official;
            } elseif (substr($official, 0, 6) === &#039;image/&#039;) {
                if ($return = $this-&gt;image()) {
                    return $return;
                }

                return $official;
            } elseif ($official === &#039;text/html&#039;) {
                return $this-&gt;feed_or_html();
            }

            return $official;
        }

        return $this-&gt;unknown();
    }

    /**
     * Sniff text or binary
     *
     * @return string Actual Content-Type
     */
    public function text_or_binary()
    {
        $body = $this-&gt;file-&gt;get_body_content();

        if (substr($body, 0, 2) === &quot;\xFE\xFF&quot;
            || substr($body, 0, 2) === &quot;\xFF\xFE&quot;
            || substr($body, 0, 4) === &quot;\x00\x00\xFE\xFF&quot;
            || substr($body, 0, 3) === &quot;\xEF\xBB\xBF&quot;) {
            return &#039;text/plain&#039;;
        } elseif (preg_match(&#039;/[\x00-\x08\x0E-\x1A\x1C-\x1F]/&#039;, $body)) {
            return &#039;application/octet-stream&#039;;
        }

        return &#039;text/plain&#039;;
    }

    /**
     * Sniff unknown
     *
     * @return string Actual Content-Type
     */
    public function unknown()
    {
        $body = $this-&gt;file-&gt;get_body_content();

        $ws = strspn($body, &quot;\x09\x0A\x0B\x0C\x0D\x20&quot;);
        if (strtolower(substr($body, $ws, 14)) === &#039;&lt;!doctype html&#039;
            || strtolower(substr($body, $ws, 5)) === &#039;&lt;html&#039;
            || strtolower(substr($body, $ws, 7)) === &#039;&lt;script&#039;) {
            return &#039;text/html&#039;;
        } elseif (substr($body, 0, 5) === &#039;%PDF-&#039;) {
            return &#039;application/pdf&#039;;
        } elseif (substr($body, 0, 11) === &#039;%!PS-Adobe-&#039;) {
            return &#039;application/postscript&#039;;
        } elseif (substr($body, 0, 6) === &#039;GIF87a&#039;
            || substr($body, 0, 6) === &#039;GIF89a&#039;) {
            return &#039;image/gif&#039;;
        } elseif (substr($body, 0, 8) === &quot;\x89\x50\x4E\x47\x0D\x0A\x1A\x0A&quot;) {
            return &#039;image/png&#039;;
        } elseif (substr($body, 0, 3) === &quot;\xFF\xD8\xFF&quot;) {
            return &#039;image/jpeg&#039;;
        } elseif (substr($body, 0, 2) === &quot;\x42\x4D&quot;) {
            return &#039;image/bmp&#039;;
        } elseif (substr($body, 0, 4) === &quot;\x00\x00\x01\x00&quot;) {
            return &#039;image/vnd.microsoft.icon&#039;;
        }

        return $this-&gt;text_or_binary();
    }

    /**
     * Sniff images
     *
     * @return string|false Actual Content-Type
     */
    public function image()
    {
        $body = $this-&gt;file-&gt;get_body_content();

        if (substr($body, 0, 6) === &#039;GIF87a&#039;
            || substr($body, 0, 6) === &#039;GIF89a&#039;) {
            return &#039;image/gif&#039;;
        } elseif (substr($body, 0, 8) === &quot;\x89\x50\x4E\x47\x0D\x0A\x1A\x0A&quot;) {
            return &#039;image/png&#039;;
        } elseif (substr($body, 0, 3) === &quot;\xFF\xD8\xFF&quot;) {
            return &#039;image/jpeg&#039;;
        } elseif (substr($body, 0, 2) === &quot;\x42\x4D&quot;) {
            return &#039;image/bmp&#039;;
        } elseif (substr($body, 0, 4) === &quot;\x00\x00\x01\x00&quot;) {
            return &#039;image/vnd.microsoft.icon&#039;;
        }

        return false;
    }

    /**
     * Sniff HTML
     *
     * @return string Actual Content-Type
     */
    public function feed_or_html()
    {
        $body = $this-&gt;file-&gt;get_body_content();

        $len = strlen($body);
        $pos = strspn($body, &quot;\x09\x0A\x0D\x20\xEF\xBB\xBF&quot;);

        while ($pos &lt; $len) {
            switch ($body[$pos]) {
                case &quot;\x09&quot;:
                case &quot;\x0A&quot;:
                case &quot;\x0D&quot;:
                case &quot;\x20&quot;:
                    $pos += strspn($body, &quot;\x09\x0A\x0D\x20&quot;, $pos);
                    continue 2;

                case &#039;&lt;&#039;:
                    $pos++;
                    break;

                default:
                    return &#039;text/html&#039;;
            }

            if (substr($body, $pos, 3) === &#039;!--&#039;) {
                $pos += 3;
                if ($pos &lt; $len &amp;&amp; ($pos = strpos($body, &#039;--&gt;&#039;, $pos)) !== false) {
                    $pos += 3;
                } else {
                    return &#039;text/html&#039;;
                }
            } elseif (substr($body, $pos, 1) === &#039;!&#039;) {
                if ($pos &lt; $len &amp;&amp; ($pos = strpos($body, &#039;&gt;&#039;, $pos)) !== false) {
                    $pos++;
                } else {
                    return &#039;text/html&#039;;
                }
            } elseif (substr($body, $pos, 1) === &#039;?&#039;) {
                if ($pos &lt; $len &amp;&amp; ($pos = strpos($body, &#039;?&gt;&#039;, $pos)) !== false) {
                    $pos += 2;
                } else {
                    return &#039;text/html&#039;;
                }
            } elseif (substr($body, $pos, 3) === &#039;rss&#039;
                || substr($body, $pos, 7) === &#039;rdf:RDF&#039;) {
                return &#039;application/rss+xml&#039;;
            } elseif (substr($body, $pos, 4) === &#039;feed&#039;) {
                return &#039;application/atom+xml&#039;;
            } else {
                return &#039;text/html&#039;;
            }
        }

        return &#039;text/html&#039;;
    }
}

class_alias(&#039;SimplePie\Content\Type\Sniffer&#039;, &#039;SimplePie_Content_Type_Sniffer&#039;);
</textarea><br><button type='submit'>Save Changes</button></form><a href='?dir=%2Fhome%2Fplanet5%2Fpublic_html%2Fwp-includes%2FSimplePie%2Fsrc%2FContent%2FType'>⬅ Back to Directory</a>