send_status_line(403, 'Forbidden');
trigger_error(sprintf($user->lang['EXTENSION_DISABLED_AFTER_POSTING'], $attachment['extension']));
}
}
$download_mode = (int) $extensions[$attachment['extension']]['download_mode'];
$display_cat = $extensions[$attachment['extension']]['display_cat'];
if (($display_cat == ATTACHMENT_CATEGORY_IMAGE || $display_cat == ATTACHMENT_CATEGORY_THUMB) && !$user->optionget('viewimg')) {
$display_cat = ATTACHMENT_CATEGORY_NONE;
}
if ($display_cat == ATTACHMENT_CATEGORY_FLASH && !$user->optionget('viewflash')) {
$display_cat = ATTACHMENT_CATEGORY_NONE;
}
if ($thumbnail) {
$attachment['physical_filename'] = 'thumb_' . $attachment['physical_filename'];
} else {
if ($display_cat == ATTACHMENT_CATEGORY_NONE && !$attachment['is_orphan'] && !src_http_byte_range($attachment['filesize'])) {
// Update download count
src_increment_downloads($db, $attachment['attach_id']);
}
}
if ($display_cat == ATTACHMENT_CATEGORY_IMAGE && $mode === 'view' && strpos($attachment['mimetype'], 'image') === 0 && strpos(strtolower($user->browser), 'msie') !== false && !src_is_greater_ie_version($user->browser, 7)) {
wrap_img_in_html(append_sid($src_root_path . 'download/file.' . $phpEx, 'id=' . $attachment['attach_id']), $attachment['real_filename']);
file_gc();
} else {
// Determine the 'presenting'-method
if ($download_mode == PHYSICAL_LINK) {
// This presenting method should no longer be used
if (!@is_dir($src_root_path . $config['upload_path'])) {
send_status_line(500, 'Internal Server Error');
trigger_error($user->lang['PHYSICAL_DOWNLOAD_NOT_POSSIBLE']);
}
/**
* Send file to browser
*/
function send_file_to_browser($attachment, $upload_dir, $category)
{
global $user, $db, $config, $src_root_path;
$filename = $src_root_path . $upload_dir . '/' . $attachment['physical_filename'];
if (!@file_exists($filename)) {
send_status_line(404, 'Not Found');
trigger_error('ERROR_NO_ATTACHMENT');
}
// Correct the mime type - we force application/octetstream for all files, except images
// Please do not change this, it is a security precaution
if ($category != ATTACHMENT_CATEGORY_IMAGE || strpos($attachment['mimetype'], 'image') !== 0) {
$attachment['mimetype'] = strpos(strtolower($user->browser), 'msie') !== false || strpos(strtolower($user->browser), 'opera') !== false ? 'application/octetstream' : 'application/octet-stream';
}
if (@ob_get_length()) {
@ob_end_clean();
}
// Now send the File Contents to the Browser
$size = @filesize($filename);
// To correctly display further errors we need to make sure we are using the correct headers for both (unsetting content-length may not work)
// Check if headers already sent or not able to get the file contents.
if (headers_sent() || !@file_exists($filename) || !@is_readable($filename)) {
// PHP track_errors setting On?
if (!empty($php_errormsg)) {
send_status_line(500, 'Internal Server Error');
trigger_error($user->lang['UNABLE_TO_DELIVER_FILE'] . '<br />' . sprintf($user->lang['TRACKED_PHP_ERROR'], $php_errormsg));
}
send_status_line(500, 'Internal Server Error');
trigger_error('UNABLE_TO_DELIVER_FILE');
}
// Make sure the database record for the filesize is correct
if ($size > 0 && $size != $attachment['filesize']) {
// Update database record
$sql = 'UPDATE ' . ATTACHMENTS_TABLE . '
SET filesize = ' . (int) $size . '
WHERE attach_id = ' . (int) $attachment['attach_id'];
$db->sql_query($sql);
}
// Now the tricky part... let's dance
header('Cache-Control: public');
// Send out the Headers. Do not set Content-Disposition to inline please, it is a security measure for users using the Internet Explorer.
header('Content-Type: ' . $attachment['mimetype']);
if (src_is_greater_ie_version($user->browser, 7)) {
header('X-Content-Type-Options: nosniff');
}
if ($category == ATTACHMENT_CATEGORY_FLASH && request_var('view', 0) === 1) {
// We use content-disposition: inline for flash files and view=1 to let it correctly play with flash player 10 - any other disposition will fail to play inline
header('Content-Disposition: inline');
} else {
if (empty($user->browser) || strpos(strtolower($user->browser), 'msie') !== false && !src_is_greater_ie_version($user->browser, 7)) {
header('Content-Disposition: attachment; ' . header_filename(htmlspecialchars_decode($attachment['real_filename'])));
if (empty($user->browser) || strpos(strtolower($user->browser), 'msie 6.0') !== false) {
header('Expires: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
}
} else {
header('Content-Disposition: ' . (strpos($attachment['mimetype'], 'image') === 0 ? 'inline' : 'attachment') . '; ' . header_filename(htmlspecialchars_decode($attachment['real_filename'])));
if (src_is_greater_ie_version($user->browser, 7) && strpos($attachment['mimetype'], 'image') !== 0) {
header('X-Download-Options: noopen');
}
}
}
// Close the db connection before sending the file etc.
file_gc(false);
if (!set_modified_headers($attachment['filetime'], $user->browser)) {
// We make sure those have to be enabled manually by defining a constant
// because of the potential disclosure of full attachment path
// in case support for features is absent in the webserver software.
if (defined('src_ENABLE_X_ACCEL_REDIRECT') && src_ENABLE_X_ACCEL_REDIRECT) {
// X-Accel-Redirect - http://wiki.nginx.org/XSendfile
header('X-Accel-Redirect: ' . $user->page['root_script_path'] . $upload_dir . '/' . $attachment['physical_filename']);
exit;
} else {
if (defined('src_ENABLE_X_SENDFILE') && src_ENABLE_X_SENDFILE && !src_http_byte_range($size)) {
// X-Sendfile - http://blog.lighttpd.net/articles/2006/07/02/x-sendfile
// Lighttpd's X-Sendfile does not support range requests as of 1.4.26
// and always requires an absolute path.
header('X-Sendfile: ' . dirname(__FILE__) . "/../{$upload_dir}/{$attachment['physical_filename']}");
exit;
}
}
if ($size) {
header("Content-Length: {$size}");
}
// Try to deliver in chunks
@set_time_limit(0);
$fp = @fopen($filename, 'rb');
if ($fp !== false) {
// Deliver file partially if requested
if ($range = src_http_byte_range($size)) {
fseek($fp, $range['byte_pos_start']);
send_status_line(206, 'Partial Content');
header('Content-Range: bytes ' . $range['byte_pos_start'] . '-' . $range['byte_pos_end'] . '/' . $range['bytes_total']);
header('Content-Length: ' . $range['bytes_requested']);
}
while (!feof($fp)) {
echo fread($fp, 8192);
}
fclose($fp);
} else {
@readfile($filename);
}
flush();
}
exit;
}