使用LiipImagineBundle上传后调整图像大小？

Question

我在Symfony 2.1中使用LiipImagineBundle，并希望在上载之前调整用户上传的图像的大小，然后将它们保存到永久文件系统位置（去除元数据，强制jpeg格式和限制文件大小）。我必须从控制器调用“strip”和“resize”过滤器，然后将过滤的图像从临时位置保存到文件系统中我选择的文件夹中。

我试图使用LiipImageBundle Controller as a service as indicated in the bundle's readme，但被调用的Action主要用于在请求显示图像（在上传过程中使用它进行过滤时是另一种情况）时在缓存目录中创建过滤图像。无论如何，我试图按照如下方式实施它，并将其付诸实施。我必须首先将文件从Web服务器的php临时目录移动到Web文件夹中的目录才能应用过滤器。其次，我应用过滤器并删除（取消链接（））最初的未过滤文件。最后，我必须将过滤的文件移动（重命名（））到文件系统中的永久位置。有必要移动文件两次，应用一次过滤器，并删除（取消链接）1个文件，使其全部工作。上传时是否有更好的方法（不需要中间移动）来使用该包？

class MyController extends Controller 
{ 
    public function new_imageAction(Request $request) 
    { 
     $uploadedFile = $request->files->get('file'); 
     $tmpFolderPathAbs = $this->get('kernel')->getRootDir() . '/../web/uploads/tmp/'; 
     $tmpImageNameNoExt = rand(); 
     $tmpImageName = $tmpImageNameNoExt . '.' . $fileExtension; 
     $uploadedFile->move($tmpFolderPathAbs, $tmpImageName); 
     $tmpImagePathRel = '/uploads/tmp/' . $tmpImageName; 
     // Create the filtered image in a tmp folder: 
     $this->container->get('liip_imagine.controller')->filterAction($request, $tmpImagePathRel, 'my_filter'); 
     unlink($tmpFolderPathAbs . $tmpImageName); 
     $filteredImagePathAbs = $this->get('kernel')->getRootDir() . '/../web/uploads/cache/my_filter/uploads/tmp/' . $tmpImageNameNoExt . '.jpeg'; 
     $imagePath = $imageManagerResponse->headers->get('location'); 
     // define permanent location ($permanentImagePathAbs)... 
     rename($filteredImagePathAbs, $permanentImagePathAbs); 
    } 
} 

我在app /配置/ config.yml滤波器如下：

liip_imagine: 
    filter_sets: 
     my_filter: 
      format: jpeg 
      filters: 
       strip: ~ 
       thumbnail: { size: [1600, 1000], mode: inset } 

A similar question was asked for the ImagineAvalancheBundle但没有太多的细节中给出。也许实施another service from the here provided list是更好的解决方案？

Answer 1

所以，这里有一个使用LiipImagineBundle上传缩略图的方法。诀窍是使用他们的一些其他服务：

/** 
    * Write a thumbnail image using the LiipImagineBundle 
    * 
    * @param Document $document an Entity that represents an image in the database 
    * @param string $filter the Imagine filter to use 
    */ 
    private function writeThumbnail($document, $filter) { 
     $path = $document->getWebPath();        // domain relative path to full sized image 
     $tpath = $document->getRootDir().$document->getThumbPath();  // absolute path of saved thumbnail 

     $container = $this->container;         // the DI container 
     $dataManager = $container->get('liip_imagine.data.manager'); // the data manager service 
     $filterManager = $container->get('liip_imagine.filter.manager');// the filter manager service 

     $image = $dataManager->find($filter, $path);     // find the image and determine its type 
     $response = $filterManager->get($this->getRequest(), $filter, $image, $path); // run the filter 
     $thumb = $response->getContent();        // get the image from the response 

     $f = fopen($tpath, 'w');          // create thumbnail file 
     fwrite($f, $thumb);            // write the thumbnail 
     fclose($f);              // close the file 
    } 

这也可以通过直接调用，如果你有没有其他的原因包括LiipImagineBundle畅想库函数来完成。我可能会在未来考虑这一点，但这对我的情况很有效，并且表现非常好。

Answer 2

鉴于我没有找到更好的方法，我保留了问题描述中描述的解决方案。从性能的角度来看，这个解决方案似乎并不是最理想的解决方案（它需要移动文件两次，应用一次过滤器，然后取消链接一个文件），但它可以完成工作。

UPDATE：

我改变了我的代码使用在彼得·伍斯特的回答表明了服务，如下图所示（如过滤后的图像直接保存到最终目的地的解决方案是更优化）：

class MyController extends Controller 
{ 
    public function new_imageAction(Request $request) 
    { 
     $uploadedFile = $request->files->get('file'); 
     // ...get file extension and do other validation... 
     $tmpFolderPathAbs = $this->get('kernel')->getRootDir() . '/../web/uploads/tmp/'; // folder to store unfiltered temp file 
     $tmpImageNameNoExt = rand(); 
     $tmpImageName = $tmpImageNameNoExt . '.' . $fileExtension; 
     $uploadedFile->move($tmpFolderPathAbs, $tmpImageName); 
     $tmpImagePathRel = '/uploads/tmp/' . $tmpImageName; 
     // Create the filtered image: 
     $processedImage = $this->container->get('liip_imagine.data.manager')->find('my_filter', $tmpImagePathRel); 
     $filteredImage = $this->container->get('liip_imagine.filter.manager')->get($request, 'my_filter', $processedImage, $tmpImagePathRel)->getContent(); 
     unlink($tmpFolderPathAbs . $tmpImageName); // eliminate unfiltered temp file. 
     $permanentFolderPath = $this->get('kernel')->getRootDir() . '/../web/uploads/path_to_folder/'; 
     $permanentImagePath = $permanentFolderPath . 'my_image.jpeg'; 
     $f = fopen($permanentImagePath, 'w'); 
     fwrite($f, $filteredImage); 
     fclose($f); 
    } 
} 

Answer 3

@Peter Wooster的修改版本，使它更通用，所以如果有人在没有图像实体的情况下使用它，他/她可以轻松地从中获得好处。我在这里给出两个版本，一个可以用在实用程序或非控制器类中。另一个版本用于控制器类。这取决于你现在你喜欢的地方:)

要在控制器外使用例如将其保存在实用程序类别中

/** 
* Write a thumbnail image using the LiipImagineBundle 
* 
* @param Document $fullSizeImgWebPath path where full size upload is stored e.g. uploads/attachments 
* @param string $thumbAbsPath full absolute path to attachment directory e.g. /var/www/project1/images/thumbs/ 
* @param string $filter filter defined in config e.g. my_thumb 
* @param Object $diContainer Dependency Injection Object, if calling from controller just pass $this 
*/ 
public function writeThumbnail($fullSizeImgWebPath, $thumbAbsPath, $filter, $diContainer) { 
    $container = $diContainer; // the DI container, if keeping this function in controller just use $container = $this 
    $dataManager = $container->get('liip_imagine.data.manager'); // the data manager service 
    $filterManager = $container->get('liip_imagine.filter.manager'); // the filter manager service 
    $image = $dataManager->find($filter, $fullSizeImgWebPath);     // find the image and determine its type 
    $response = $filterManager->applyFilter($image, $filter); 

    $thumb = $response->getContent();        // get the image from the response 

    $f = fopen($thumbAbsPath, 'w');          // create thumbnail file 
    fwrite($f, $thumb);            // write the thumbnail 
    fclose($f);              // close the file 
} 

要在控制器中使用，例如， CommonController或任何其他控制器。

/** 
* Write a thumbnail image using the LiipImagineBundle 
* 
* @param Document $fullSizeImgWebPath path where full size upload is stored e.g. uploads/attachments 
* @param string $thumbAbsPath full absolute path to attachment directory e.g. /var/www/project1/images/thumbs/ 
* @param string $filter filter defined in config e.g. my_thumb 
*/ 
public function writeThumbnail($fullSizeImgWebPath, $thumbAbsPath, $filter) { 
    $container = $this->container; 
    $dataManager = $container->get('liip_imagine.data.manager'); // the data manager service 
    $filterManager = $container->get('liip_imagine.filter.manager'); // the filter manager service 
    $image = $dataManager->find($filter, $fullSizeImgWebPath);     // find the image and determine its type 
    $response = $filterManager->applyFilter($image, $filter); 

    $thumb = $response->getContent();        // get the image from the response 

    $f = fopen($thumbAbsPath, 'w');          // create thumbnail file 
    fwrite($f, $thumb);            // write the thumbnail 
    fclose($f);              // close the file 
} 

Answer 4

我写了一个解决这个问题的包。虽然VichUploaderBundle使用ORM的生命周期回调提供轻松上传，但LiipImagine在调整大小方面做得很好。

这里是它的组合：https://github.com/RSSfeed/VichImagineBundle

参见如何实现它只有几分钟的short readme。

Answer 5

不必加载使用LIIP数据管理器的文件，上传文件中创建LIIP二进制对象：

use Liip\ImagineBundle\Model\Binary; 

然后使用下面的代码：

   // Generate a unique name for the file before saving it 
       $fileName = md5(uniqid()) . '.' . $uploadedFile->guessExtension(); 

       $contents = file_get_contents($uploadedFile); 

       $binary = new Binary(
        $contents, 
        $uploadedFile->getMimeType(), 
        $uploadedFile->guessExtension() 
       ); 

       $container = $this->container; 
       $filterManager = $container->get('liip_imagine.filter.manager'); // the filter manager service 
       $response = $filterManager->applyFilter($binary, 'my_thumb'); 

       $thumb = $response->getContent();        // get the image from the response 

       $f = fopen($webRootDir .'/images_dir/' . $fileName, 'w');          // create thumbnail file 
       fwrite($f, $thumb);            // write the thumbnail 
       fclose($f);              // close the file