pandorafms/pandora_console/include/Image/image_functions.php

<?php
/**
 * @category Images
 * @package  Image_Graph
 */

/**
 * Pandora FMS - http://pandorafms.com
 * ==================================================
 * Copyright (c) 2005-2021 Artica Soluciones Tecnologicas
 * Please see http://pandorafms.org for full contribution list
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation for version 2.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

// INI Lines of code for direct url call script
if (isset($_GET['getFile'])) {
    $file = $_GET['file'];

    if (isset($_GET['thumb'])) {
        if (!isset($_GET['thumb_size'])) {
            $newWidth = $newHeight = '50%';
        } else {
            $new_size_values = explode('x', $_GET['thumb_size']);
            $newWidth = (integer) $new_size_values[0];
            $newHeight = (integer) $new_size_values[1];
        }

        $temp = explode('/', $file);
        $fileName = end($temp);

        $fileTemp = sys_get_temp_dir().'/tumb_'.$newWidth.'x'.$newHeight.'_'.$fileName;

        if (is_file($fileTemp)) {
            if (!is_readable($fileTemp)) {
                $fileTemp = sys_get_temp_dir().'/tumb_'.$newWidth.'x'.$newHeight.'_'.uniqid().'_'.$fileName;
                createthumb($_SERVER['DOCUMENT_ROOT'].$file, $fileTemp, $newWidth, $newHeight);
            }
        } else {
            createthumb($file, $fileTemp, $newWidth, $newHeight);
        }

        getFile($fileName, $fileTemp);
        unlink($fileTemp);
    }
}

// END Lines of code for direct url call script


/**
 * Get a file change http header and write as binary output for
 * redirect to file content.
 *
 * @param string destFileName Name for rename file when the browser get the file.
 * @param string fileLocation The real location the file in server.
 */
function getFile($destFileName, $fileLocation)
{
    error_reporting(0);

    // NOTICE: mime_conent_type() IS NOT SUPPORTED IN PHP >= 5.2.11 anymore
    // THIS DOESNT WORK ON SUSE 11.x !
    // header('Content-type: aplication/octet-stream;');
    // header('Content-type: ' . mime_content_type($fileLocation) . ';');
    // header( "Content-Length: " . filesize($fileLocation));
    // header('Content-Disposition: attachment; filename="' . $destFileName . '"');
    // Do not send any header, rely on browser
    readfile($fileLocation);
}


/**
 * Create a thumb of image file in filesystem of server.
 *
 * @param string origFileName Original image
 * @param string destFileName Thumb image
 * @param integer newWidth Thumb width
 * @param integer newHeight Thumb height
 */
function createthumb($origFileName, $destFileName, $newWidth, $newHeight)
{
    // TODO $newWidth and $newHeight values as percent.
    preg_match('/\.(jpg|jpeg|png)$/', $origFileName, $match);
    $extension = '';
    if (!empty($match)) {
        $extension = $match[1];
    }

    if (preg_match('/jpg|jpeg/', $extension)) {
        $src_img = imagecreatefromjpeg($origFileName);
    }

    if (preg_match('/png/', $extension)) {
        $src_img = imagecreatefrompng($origFileName);
    }

    $oldWidth = imagesx($src_img);
    $oldHeight = imagesy($src_img);

    $dst_img = imagecreatetruecolor($newWidth, $newHeight);
    imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $newWidth, $newHeight, $oldWidth, $oldHeight);
    if (preg_match('/png/', $extension)) {
        imagepng($dst_img, $destFileName);
    } else {
        imagejpeg($dst_img, $destFileName);
    }

    imagedestroy($dst_img);
    imagedestroy($src_img);
}