Retries on 503/504 errors #262

'curl' => self::curlResponseCapture(),
.
.
.
    // The manticoresearch-php library uses curl to make the requests
    // but doesn't tell us the HTTP status code or response headers which
    // are useful for troubleshooting. So adding this custom function to capture them.
    private static function curlResponseCapture() {
        return [
            CURLOPT_HEADERFUNCTION => function($ch, $header) {
                if (preg_match('/^HTTP\/[\d.]+\s+(\d+)/', $header, $matches)) {
                    self::$lastHttpStatus = (int)$matches[1];
                    self::$lastResponseHeaders = [];
                }
                $trimmed = trim($header);
                if ($trimmed !== '') {
                    self::$lastResponseHeaders[] = $trimmed;
                }
                return strlen($header);
            },
            CURLOPT_WRITEFUNCTION => function($ch, $data) {
                self::$lastResponseBody = $data;
                echo $data;
                return strlen($data);
            },
        ];
    }