<?php

namespace Monolog\Handler\Curl;

use CurlHandle;

/**
 * This class is marked as internal and it is not under the BC promise of the package.
 *
 * @internal
 */
final class Util
{
    /** @var array<int> */
    private static $retriableErrorCodes = [
        CURLE_COULDNT_RESOLVE_HOST,
        CURLE_COULDNT_CONNECT,
        CURLE_HTTP_NOT_FOUND,
        CURLE_READ_ERROR,
        CURLE_OPERATION_TIMEOUTED,
        CURLE_HTTP_POST_ERROR,
        CURLE_SSL_CONNECT_ERROR,
    ];

    /**
     * Executes a CURL request with optional retries and exception on failure
     *
     * @param  resource|CurlHandle $ch             curl handler
     * @param  int                 $retries
     * @param  bool                $closeAfterDone
     * @return bool|string         @see curl_exec
     */
    public static function execute($ch, int $retries = 5, bool $closeAfterDone = true)
    {
        while ($retries--) {
            $curlResponse = curl_exec($ch);
            if ($curlResponse === false) {
                $curlErrno = curl_errno($ch);

                if (false === in_array($curlErrno, self::$retriableErrorCodes, true) || !$retries) {
                    $curlError = curl_error($ch);

                    if ($closeAfterDone) {
                        curl_close($ch);
                    }

                    throw new \RuntimeException(sprintf('Curl error (code %d): %s', $curlErrno, $curlError));
                }

                continue;
            }

            if ($closeAfterDone) {
                curl_close($ch);
            }

            return $curlResponse;
        }

        return false;
    }
}
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