silverstripe-framework/filesystem/flysystem/AssetAdapter.php

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<?php
namespace SilverStripe\Filesystem\Flysystem;
use Controller;
use Director;
use League\Flysystem\Adapter\Local;
/**
* Adaptor for local filesystem based on assets directory
*
* @package framework
* @subpackage filesystem
*/
class AssetAdapter extends Local {
public function __construct($root = null, $writeFlags = LOCK_EX, $linkHandling = self::DISALLOW_LINKS) {
parent::__construct($root ?: ASSETS_PATH, $writeFlags, $linkHandling);
}
/**
* Provide downloadable url
*
* @param string $path
* @return string|null
*/
public function getPublicUrl($path) {
$rootPath = realpath(BASE_PATH);
$filesPath = realpath($this->pathPrefix);
if(stripos($filesPath, $rootPath) === 0) {
$dir = substr($filesPath, strlen($rootPath));
return Controller::join_links(Director::baseURL(), $dir, $path);
}
// File outside of webroot can't be used
return null;
}
}