Question

我已经为获取外部图像做了一个自己的视图（感谢robert pflamm，请参阅Typo3 fluid image from external resource）。如果我只使用ImageViewHelper，那么一切正常。

但如果我使用\TYPO3\CMS\Fluid\ViewHelpers\Uri\ImageViewHelper，图像只会渲染一次。与TYPO3 ver. 7.6.2 - Condition ViewHelpers evaluated only once相同的问题。但我不知道如何解决它

有人可以帮忙吗？马丁



    namespace Mwxxx\Mwxxx\ViewHelpers;

    use TYPO3\CMS\Core\Utility\GeneralUtility;
    use TYPO3\CMS\Fluid\ViewHelpers\Uri\ImageViewHelper;
    use TYPO3\CMS\Core\Resource\FileInterface;
    use TYPO3\CMS\Extbase\Domain\Model\AbstractFileFolder;

    class ExternalImageViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Uri\ImageViewHelper
  {

    const UPLOAD_DIRECTORY = 'upload';
    const TEMP_PREFIX = 'Mwxx';

    /**
    * ResourceFactory
    *
    * @var \TYPO3\CMS\Core\Resource\ResourceFactory
    * @inject
    */
    protected $resourceFactory = null;

    /**
    * Resizes a given image (if required) and renders the respective img tag
    *
     * @see https://docs.typo3.org/typo3cms/TyposcriptReference/ContentObjects/Image/
    *
    * @param string                           $src                a path to a file, a combined FAL identifier or an uid (integer). If $treatIdAsReference is set, the integer is considered the uid of the sys_file_reference record. If you already got a FAL object, consider using the $image parameter instead
    * @param string                           $width              width of the image. This can be a numeric value representing the fixed width of the image in pixels. But you can also perform simple calculations by adding "m" or "c" to the value. See imgResource.width for possible options.
    * @param string                           $height             height of the image. This can be a numeric value representing the fixed height of the image in pixels. But you can also perform simple calculations by adding "m" or "c" to the value. See imgResource.width for possible options.
    * @param integer                          $minWidth           minimum width of the image
    * @param integer                          $minHeight          minimum height of the image
    * @param integer                          $maxWidth           maximum width of the image
    * @param integer                          $maxHeight          maximum height of the image
    * @param boolean                          $treatIdAsReference given src argument is a sys_file_reference record
    * @param FileInterface|AbstractFileFolder $image              a FAL object
    *
    * @return string
    * @throws \Exception
   * @throws \TYPO3\CMS\Core\Resource\Exception\InsufficientFolderAccessPermissionsException
    * @throws \TYPO3\CMS\Core\Resource\Exception\InsufficientFolderWritePermissionsException
    * @throws \TYPO3\CMS\Fluid\Core\ViewHelper\Exception
    */
    public function render($src = null, $image = null, $width = null, $height = null, $minWidth = null, $minHeight = null, $maxWidth = null, $maxHeight = null, $treatIdAsReference = false)
    {
    if (filter_var($src, FILTER_VALIDATE_URL)) {
      $storage = $this->resourceFactory->getDefaultStorage();
      if (!$storage->hasFolder(self::UPLOAD_DIRECTORY)) {
        $storage->createFolder(self::UPLOAD_DIRECTORY);
      }
      if (file_exists('fileadmin/upload/'.basename(basename($src)))) {
          #echo "Die Datei $filename existiert";
           $src         = 'fileadmin/upload/'.basename(basename($src));
      }
      else {
          $externalFile = GeneralUtility::getUrl($src);
          if ($externalFile) {
            $tempFileName = tempnam(sys_get_temp_dir(), self::TEMP_PREFIX);
            $handle       = fopen($tempFileName, "w");
            fwrite($handle, $externalFile);
            fclose($handle);

            $uploadFolder = $storage->getFolder(self::UPLOAD_DIRECTORY);
                #echo "Die Datei $filename existiert nicht";
                $file         = $uploadFolder->addFile($tempFileName, basename(basename($src)), 'changeName');
                $src          = $file->getPublicUrl();
                #unlink($tempFileName);

          } else {
            throw new \Exception(sprintf('External URL % cannot accessed.', $src), 1473233519);
          }
      }

    }
    return parent::render($src, $image, $width, $height, $minWidth, $minHeight, $maxWidth, $maxHeight, $treatIdAsReference);
    }


    }

Answer 1

viewhelpers实际上不是一个公共API，可以通过自定义ViewHelpers进行扩展！

您遇到的问题是，在第一次调用之后，将编译ViewHelpers并使用您不会覆盖的方法renderStatic。

最好的解决方案是复制父类的代码，并且仅从AbstractViewHelper或AbstractTagBasedViewHelper

延伸

typo3 viewhelper只被调用一次

1 个答案: