Admin_AssetController::downloadImageThumbnailAction PHP Метод

    public function downloadImageThumbnailAction()
    {
        $image = Asset\Image::getById($this->getParam("id"));
        $config = null;
        if ($this->getParam("config")) {
            $config = \Zend_Json::decode($this->getParam("config"));
        } elseif ($this->getParam("type")) {
            $predefined = ["web" => ["resize_mode" => "scaleByWidth", "width" => 3500, "dpi" => 72, "format" => "JPEG", "quality" => 85], "print" => ["resize_mode" => "scaleByWidth", "width" => 6000, "dpi" => 300, "format" => "JPEG", "quality" => 95], "office" => ["resize_mode" => "scaleByWidth", "width" => 1190, "dpi" => 144, "format" => "JPEG", "quality" => 90]];
            $config = $predefined[$this->getParam("type")];
        }
        if ($config) {
            $thumbnailConfig = new Asset\Image\Thumbnail\Config();
            $thumbnailConfig->setName("pimcore-download-" . $image->getId() . "-" . md5($this->getParam("config")));
            if ($config["resize_mode"] == "scaleByWidth") {
                $thumbnailConfig->addItem("scaleByWidth", ["width" => $config["width"]]);
            } elseif ($config["resize_mode"] == "scaleByHeight") {
                $thumbnailConfig->addItem("scaleByHeight", ["height" => $config["height"]]);
            } else {
                $thumbnailConfig->addItem("resize", ["width" => $config["width"], "height" => $config["height"]]);
            }
            $thumbnailConfig->setQuality($config["quality"]);
            $thumbnailConfig->setFormat($config["format"]);
            if ($thumbnailConfig->getFormat() == "JPEG") {
                $thumbnailConfig->setPreserveMetaData(true);
                $thumbnailConfig->setPreserveColor(true);
            }
            $thumbnail = $image->getThumbnail($thumbnailConfig);
            $thumbnailFile = $thumbnail->getFileSystemPath();
            $exiftool = \Pimcore\Tool\Console::getExecutable("exiftool");
            if ($thumbnailConfig->getFormat() == "JPEG" && $exiftool && isset($config["dpi"]) && $config["dpi"]) {
                \Pimcore\Tool\Console::exec($exiftool . " -overwrite_original -xresolution=" . $config["dpi"] . " -yresolution=" . $config["dpi"] . " -resolutionunit=inches " . escapeshellarg($thumbnailFile));
            }
            $downloadFilename = str_replace("." . File::getFileExtension($image->getFilename()), "." . $thumbnail->getFileExtension(), $image->getFilename());
            $downloadFilename = strtolower($downloadFilename);
            header('Content-Disposition: attachment; filename="' . $downloadFilename . '"');
            header("Content-Type: " . $thumbnail->getMimeType(), true);
            // we have to clear the stat cache here, otherwise filesize() would return the wrong value
            // the reason is that exiftool modifies the file's size, but PHP doesn't know anything about that
            clearstatcache();
            header("Content-Length: " . filesize($thumbnailFile), true);
            $this->sendThumbnailCacheHeaders();
            while (@ob_end_flush()) {
            }
            flush();
            readfile($thumbnailFile);
            @unlink($thumbnailFile);
            exit;
        }
    }