BookStack\Services\ImageService::getPublicUrl PHP Метод

    private function getPublicUrl($filePath)
    {
        if ($this->storageUrl === null) {
            $storageUrl = config('filesystems.url');
            // Get the standard public s3 url if s3 is set as storage type
            // Uses the nice, short URL if bucket name has no periods in otherwise the longer
            // region-based url will be used to prevent http issues.
            if ($storageUrl == false && config('filesystems.default') === 's3') {
                $storageDetails = config('filesystems.disks.s3');
                if (strpos($storageDetails['bucket'], '.') === false) {
                    $storageUrl = 'https://' . $storageDetails['bucket'] . '.s3.amazonaws.com';
                } else {
                    $storageUrl = 'https://s3-' . $storageDetails['region'] . '.amazonaws.com/' . $storageDetails['bucket'];
                }
            }
            $this->storageUrl = $storageUrl;
        }
        if ($this->isLocal()) {
            $filePath = str_replace_first('public/', '', $filePath);
        }
        return ($this->storageUrl == false ? rtrim(baseUrl(''), '/') : rtrim($this->storageUrl, '/')) . $filePath;
    }