155 lines
4.2 KiB
PHP
155 lines
4.2 KiB
PHP
<?php
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/**
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*
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* This file is part of HESK - PHP Help Desk Software.
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*
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* (c) Copyright Klemen Stirn. All rights reserved.
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* https://www.hesk.com
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*
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* For the full copyright and license agreement information visit
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* https://www.hesk.com/eula.php
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*
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*/
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define('IN_SCRIPT',1);
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define('HESK_PATH','./');
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// Get all the required files and functions
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require(HESK_PATH . 'hesk_settings.inc.php');
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require(HESK_PATH . 'inc/common.inc.php');
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hesk_load_database_functions();
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hesk_session_start();
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// Are we in maintenance mode? (check customers only)
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if ( empty($_SESSION['id']) )
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{
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hesk_check_maintenance();
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}
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// Knowledgebase attachments
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if ( isset($_GET['kb_att']) )
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{
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// Attachment ID
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$att_id = intval( hesk_GET('kb_att') ) or hesk_error($hesklang['id_not_valid']);
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// Connect to database
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hesk_dbConnect();
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// Get attachment info
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$res = hesk_dbQuery("SELECT * FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_attachments` WHERE `att_id`='{$att_id}' LIMIT 1");
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if (hesk_dbNumRows($res) != 1)
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{
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hesk_error($hesklang['id_not_valid'].' (att_id)');
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}
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$file = hesk_dbFetchAssoc($res);
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// Is this person allowed access to this attachment?
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$res = hesk_dbQuery("SELECT `t1`.`type` as `cat_type`, `t2`.`type` as `art_type`
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FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_articles` AS `t2`
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JOIN `".hesk_dbEscape($hesk_settings['db_pfix'])."kb_categories` AS `t1`
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ON `t2`.`catid` = `t1`.`id`
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WHERE (`t2`.`attachments` LIKE '{$att_id}#%' OR `t2`.`attachments` LIKE '%,{$att_id}#%' )
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LIMIT 1");
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// If no attachment found, throw an error
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if (hesk_dbNumRows($res) != 1)
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{
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hesk_error($hesklang['id_not_valid'].' (no_art)');
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}
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$row = hesk_dbFetchAssoc($res);
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// Private or draft article or category?
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if ($row['cat_type'] || $row['art_type'])
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{
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if ( empty($_SESSION['id']) )
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{
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// This is a staff-only attachment
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hesk_error($hesklang['attpri']);
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}
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elseif ($row['art_type'] == 2)
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{
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// Need permission to manage KB to access draft attachments
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require(HESK_PATH . 'inc/admin_functions.inc.php');
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hesk_checkPermission('can_man_kb');
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}
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}
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}
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// Ticket attachments
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else
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{
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// Attachmend ID and ticket tracking ID
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$att_id = intval( hesk_GET('att_id', 0) ) or die($hesklang['id_not_valid']);
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$tic_id = hesk_cleanID() or die("$hesklang[int_error]: $hesklang[no_trackID]");
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// Connect to database
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hesk_dbConnect();
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// Get attachment info
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$res = hesk_dbQuery("SELECT * FROM `".hesk_dbEscape($hesk_settings['db_pfix'])."attachments` WHERE `att_id`='{$att_id}' LIMIT 1");
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if (hesk_dbNumRows($res) != 1)
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{
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hesk_error($hesklang['id_not_valid'].' (att_id)');
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}
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$file = hesk_dbFetchAssoc($res);
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// Is ticket ID valid for this attachment?
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if ($file['ticket_id'] != $tic_id)
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{
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hesk_error($hesklang['trackID_not_found']);
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}
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// Verify email address match if needed
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if ( empty($_SESSION['id']) )
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{
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hesk_verifyEmailMatch($tic_id);
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// Only staff may download attachments to notes
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if ($file['type'])
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{
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hesk_error($hesklang['perm_deny']);
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}
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}
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}
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// Path of the file on the server
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$realpath = $hesk_settings['attach_dir'] . '/' . $file['saved_name'];
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// Perhaps the file has been deleted?
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if ( ! file_exists($realpath))
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{
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hesk_error($hesklang['attdel']);
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}
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// Send the file as an attachment to prevent malicious code from executing
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header("Pragma: "); # To fix a bug in IE when running https
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header("Cache-Control: "); # To fix a bug in IE when running https
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header('Content-Description: File Transfer');
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header('Content-Type: application/octet-stream');
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header('Content-Length: ' . $file['size']);
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header('Content-Disposition: attachment; filename=' . $file['real_name']);
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// For larger files use chunks, smaller ones can be read all at once
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$chunksize = 1048576; // = 1024 * 1024 (1 Mb)
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if ($file['size'] > $chunksize)
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{
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$handle = fopen($realpath, 'rb');
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$buffer = '';
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while ( ! feof($handle))
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{
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set_time_limit(300);
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$buffer = fread($handle, $chunksize);
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echo $buffer;
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flush();
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}
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fclose($handle);
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}
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else
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{
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readfile($realpath);
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}
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exit();
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?>
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