jkuchar/BigFileTools

<?php

namespace BigFileTools\Driver;
use Brick\Math\BigInteger;

class CurlDriver implements ISizeDriver
{
    public function __construct()
    {
        // curl solution - cross platform and really cool :)
        if (!function_exists("curl_init")) {
            throw new PrerequisiteException("CurlDriver requires CURL extension to be loaded in PHP");
        }
    }

    /**
     * Returns file size by using CURL extension
     * @inheritdoc
     * @link http://www.php.net/manual/en/function.filesize.php#100434
     */
    public function getFileSize($path)
    {
        $ch = curl_init("file://" . rawurlencode($path));
        curl_setopt($ch, CURLOPT_NOBODY, true);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, true);
        $data = curl_exec($ch);
        curl_close($ch);
        if ($data !== false && preg_match('/Content-Length: (\d+)/', $data, $matches)) {
            return BigInteger::of($matches[1]);
        }
        throw new Exception("Curl haven't returned file size.");
    }
}