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<?php |
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namespace Liip\ImagineBundle\Binary\Loader; |
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use Liip\ImagineBundle\Exception\Binary\Loader\NotLoadableException; |
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class StreamLoader implements LoaderInterface |
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{ |
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/** |
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* The wrapper prefix to append to the path to be loaded. |
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* |
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* @var string |
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*/ |
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protected $wrapperPrefix; |
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/** |
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* A stream context resource to use. |
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* |
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* @var resource|null |
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*/ |
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protected $context; |
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/** |
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* @param string $wrapperPrefix |
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* @param resource|null $context |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function __construct($wrapperPrefix, $context = null) |
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{ |
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$this->wrapperPrefix = $wrapperPrefix; |
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if ($context && !is_resource($context)) { |
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throw new \InvalidArgumentException('The given context is no valid resource.'); |
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} |
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$this->context = empty($context) ? null : $context; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function find($path) |
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{ |
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$name = $this->wrapperPrefix.$path; |
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/* |
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* This looks strange, but at least in PHP 5.3.8 it will raise an E_WARNING if the 4th parameter is null. |
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* fopen() will be called only once with the correct arguments. |
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* |
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* The error suppression is solely to determine whether the file exists. |
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* file_exists() is not used as not all wrappers support stat() to actually check for existing resources. |
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*/ |
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if (($this->context && !$resource = @fopen($name, 'r', null, $this->context)) || !$resource = @fopen($name, 'r')) { |
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throw new NotLoadableException(sprintf('Source image %s not found.', $name)); |
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} |
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// Closing the opened stream to avoid locking of the resource to find. |
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fclose($resource); |
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try { |
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$content = file_get_contents($name, null, $this->context); |
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} catch (\Exception $e) { |
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throw new NotLoadableException(sprintf('Source image %s could not be loaded.', $name), $e->getCode(), $e); |
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} |
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if (false === $content) { |
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throw new NotLoadableException(sprintf('Source image %s could not be loaded.', $name)); |
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} |
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return $content; |
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} |
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} |
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liip /
LiipImagineBundle
