Initial commit: Backup der Webseiten
- zoesch.de - blitzkiste.net - gruene-hassberge (norbert.zoesch.de) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
Felix Zösch
241
zoesch.de/galerie/include/functions_metadata.inc.php
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241
zoesch.de/galerie/include/functions_metadata.inc.php
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<?php
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// +-----------------------------------------------------------------------+
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// | Piwigo - a PHP based photo gallery |
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// +-----------------------------------------------------------------------+
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// | Copyright(C) 2008-2016 Piwigo Team http://piwigo.org |
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// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net |
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// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick |
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// +-----------------------------------------------------------------------+
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// | This program is free software; you can redistribute it and/or modify |
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// | it under the terms of the GNU General Public License as published by |
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// | the Free Software Foundation |
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// | |
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// | This program is distributed in the hope that it will be useful, but |
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// | WITHOUT ANY WARRANTY; without even the implied warranty of |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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// | General Public License for more details. |
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// | |
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// | You should have received a copy of the GNU General Public License |
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// | along with this program; if not, write to the Free Software |
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// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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// | USA. |
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// +-----------------------------------------------------------------------+
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/**
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* @package functions\metadata
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*/
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/**
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* returns informations from IPTC metadata, mapping is done in this function.
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*
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* @param string $filename
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* @param array $map
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* @return array
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*/
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function get_iptc_data($filename, $map, $array_sep=',')
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{
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global $conf;
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$result = array();
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$imginfo = array();
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if (false == @getimagesize($filename, $imginfo) )
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{
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return $result;
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}
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if (isset($imginfo['APP13']))
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{
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$iptc = iptcparse($imginfo['APP13']);
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if (is_array($iptc))
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{
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$rmap = array_flip($map);
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foreach (array_keys($rmap) as $iptc_key)
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{
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if (isset($iptc[$iptc_key][0]))
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{
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if ($iptc_key == '2#025')
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{
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$value = implode($array_sep,
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array_map('clean_iptc_value',$iptc[$iptc_key]));
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}
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else
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{
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$value = clean_iptc_value($iptc[$iptc_key][0]);
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}
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foreach (array_keys($map, $iptc_key) as $pwg_key)
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{
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$result[$pwg_key] = $value;
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if (!$conf['allow_html_in_metadata'])
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{
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// in case the origin of the photo is unsecure (user upload), we
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// remove HTML tags to avoid XSS (malicious execution of
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// javascript)
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$result[$pwg_key] = strip_tags($result[$pwg_key]);
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}
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}
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}
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}
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}
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}
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return $result;
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}
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/**
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* return a cleaned IPTC value.
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*
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* @param string $value
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* @return string
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*/
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function clean_iptc_value($value)
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{
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// strip leading zeros (weird Kodak Scanner software)
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while ( isset($value[0]) and $value[0] == chr(0))
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{
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$value = substr($value, 1);
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}
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// remove binary nulls
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$value = str_replace(chr(0x00), ' ', $value);
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if ( preg_match('/[\x80-\xff]/', $value) )
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{
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// apparently mac uses some MacRoman crap encoding. I don't know
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// how to detect it so a plugin should do the trick.
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$value = trigger_change('clean_iptc_value', $value);
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if ( ($qual = qualify_utf8($value)) != 0)
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{// has non ascii chars
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if ($qual>0)
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{
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$input_encoding = 'utf-8';
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}
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else
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{
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$input_encoding = 'iso-8859-1';
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if (function_exists('iconv') or function_exists('mb_convert_encoding'))
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{
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// using windows-1252 because it supports additional characters
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// such as "oe" in a single character (ligature). About the
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// difference between Windows-1252 and ISO-8859-1: the characters
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// 0x80-0x9F will not convert correctly. But these are control
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// characters which are almost never used.
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$input_encoding = 'windows-1252';
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}
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}
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$value = convert_charset($value, $input_encoding, get_pwg_charset());
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}
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}
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return $value;
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}
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/**
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* returns informations from EXIF metadata, mapping is done in this function.
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*
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* @param string $filename
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* @param array $map
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* @return array
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*/
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function get_exif_data($filename, $map)
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{
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global $conf;
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$result = array();
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if (!function_exists('read_exif_data'))
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{
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die('Exif extension not available, admin should disable exif use');
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}
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// Read EXIF data
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if ($exif = @read_exif_data($filename) or $exif2 = trigger_change('format_exif_data', $exif=null, $filename, $map))
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{
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if (!empty($exif2))
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{
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$exif = $exif2;
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}
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else
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{
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$exif = trigger_change('format_exif_data', $exif, $filename, $map);
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}
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// configured fields
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foreach ($map as $key => $field)
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{
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if (strpos($field, ';') === false)
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{
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if (isset($exif[$field]))
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{
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$result[$key] = $exif[$field];
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}
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}
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else
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{
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$tokens = explode(';', $field);
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if (isset($exif[$tokens[0]][$tokens[1]]))
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{
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$result[$key] = $exif[$tokens[0]][$tokens[1]];
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}
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}
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}
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// GPS data
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$gps_exif = array_intersect_key($exif, array_flip(array('GPSLatitudeRef', 'GPSLatitude', 'GPSLongitudeRef', 'GPSLongitude')));
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if (count($gps_exif) == 4)
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{
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if (
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is_array($gps_exif['GPSLatitude']) and in_array($gps_exif['GPSLatitudeRef'], array('S', 'N')) and
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is_array($gps_exif['GPSLongitude']) and in_array($gps_exif['GPSLongitudeRef'], array('W', 'E'))
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)
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{
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$result['latitude'] = parse_exif_gps_data($gps_exif['GPSLatitude'], $gps_exif['GPSLatitudeRef']);
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$result['longitude'] = parse_exif_gps_data($gps_exif['GPSLongitude'], $gps_exif['GPSLongitudeRef']);
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}
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}
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}
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if (!$conf['allow_html_in_metadata'])
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{
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foreach ($result as $key => $value)
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{
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// in case the origin of the photo is unsecure (user upload), we remove
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// HTML tags to avoid XSS (malicious execution of javascript)
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$result[$key] = strip_tags($value);
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}
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}
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return $result;
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}
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/**
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* Converts EXIF GPS format to a float value.
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* @since 2.6
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*
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* @param string[] $raw eg:
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* - 41/1
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* - 54/1
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* - 9843/500
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* @param string $ref 'S', 'N', 'E', 'W'. eg: 'N'
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* @return float eg: 41.905468
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*/
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function parse_exif_gps_data($raw, $ref)
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{
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foreach ($raw as &$i)
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{
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$i = explode('/', $i);
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$i = $i[1]==0 ? 0 : $i[0]/$i[1];
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}
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unset($i);
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$v = $raw[0] + $raw[1]/60 + $raw[2]/3600;
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$ref = strtoupper($ref);
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if ($ref == 'S' or $ref == 'W') $v= -$v;
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return $v;
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}
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?>
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