/**
* Deliver the download file
*
* If enabled, the file is symlinked to better support large file downloads
*
* @access public
* @param string $file
* @param bool $redirect True if we should perform a header redirect instead of calling edd_readfile_chunked()
* @return void
*/
function edd_deliver_download($file = '', $redirect = false)
{
/*
* If symlinks are enabled, a link to the file will be created
* This symlink is used to hide the true location of the file, even when the file URL is revealed
* The symlink is deleted after it is used
*/
if (edd_symlink_file_downloads() && edd_is_local_file($file)) {
$file = edd_get_local_path_from_url($file);
// Generate a symbolic link
$ext = edd_get_file_extension($file);
$parts = explode('.', $file);
$name = basename($parts[0]);
$md5 = md5($file);
$file_name = $name . '_' . substr($md5, 0, -15) . '.' . $ext;
$path = edd_get_symlink_dir() . '/' . $file_name;
$url = edd_get_symlink_url() . '/' . $file_name;
// Set a transient to ensure this symlink is not deleted before it can be used
set_transient(md5($file_name), '1', 30);
// Schedule deletion of the symlink
if (!wp_next_scheduled('edd_cleanup_file_symlinks')) {
wp_schedule_single_event(current_time('timestamp') + 60, 'edd_cleanup_file_symlinks');
}
// Make sure the symlink doesn't already exist before we create it
if (!file_exists($path)) {
$link = @symlink(realpath($file), $path);
} else {
$link = true;
}
if ($link) {
// Send the browser to the file
header('Location: ' . $url);
} else {
edd_readfile_chunked($file);
}
} elseif ($redirect) {
header('Location: ' . $file);
} else {
// Read the file and deliver it in chunks
edd_readfile_chunked($file);
}
}
/**
* Delete symbolic links after they have been used
*
* @access public
* @since 1.5
* @return void
*/
function edd_cleanup_file_symlinks()
{
$path = edd_get_symlink_dir();
$dir = opendir($path);
while (($file = readdir($dir)) !== false) {
if ($file == '.' || $file == '..') {
continue;
}
$transient = get_transient(md5($file));
if ($transient === false) {
@unlink($path . '/' . $file);
}
}
}
/**
* Deliver the download file
*
* If enabled, the file is symlinked to better support large file downloads
*
* @access public
* @param string file
* @return void
*/
function edd_deliver_download($file = '')
{
global $edd_options;
$symlink = apply_filters('edd_symlink_file_downloads', isset($edd_options['symlink_file_downloads']));
/*
* If symlinks are enabled, a link to the file will be created
* This symlink is used to hide the true location of the file, even when the file URL is revealed
* The symlink is deleted after it is used
*/
if ($symlink && function_exists('symlink')) {
// Generate a symbolic link
$ext = edd_get_file_extension($file);
$parts = explode('.', $file);
$name = basename($parts[0]);
$md5 = md5($file);
$file_name = $name . '_' . substr($md5, 0, -15) . '.' . $ext;
$path = edd_get_symlink_dir() . '/' . $file_name;
$url = edd_get_symlink_url() . '/' . $file_name;
// Set a transient to ensure this symlink is not deleted before it can be used
set_transient(md5($file_name), '1', 30);
// Schedule deletion of the symlink
if (!wp_next_scheduled('edd_cleanup_file_symlinks')) {
wp_schedule_single_event(time() + 60, 'edd_cleanup_file_symlinks');
}
// Make sure the symlink doesn't already exist before we create it
if (!file_exists($path)) {
$link = symlink($file, $path);
} else {
$link = true;
}
if ($link) {
// Send the browser to the file
header('Location: ' . $url);
} else {
@edd_readfile_chunked($file);
}
} else {
// Read the file and deliver it in chunks
@edd_readfile_chunked($file);
}
}
