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<?php |
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/** |
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* Media controller |
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* |
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* Basic controller for media functions |
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* |
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* @category Controller |
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* @subpackage Media |
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* @package Olapus |
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* @author Jan Drda <[email protected]> |
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* @copyright Jan Drda |
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* @license https://opensource.org/licenses/MIT MIT |
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*/ |
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namespace App\Http\Controllers\Media; |
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use App\Helpers; |
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use Illuminate\Http\Request; |
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use App\Http\Controllers\Controller; |
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use App\Image; |
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use Illuminate\Support\Facades\Response; |
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use Illuminate\Support\Facades\App; |
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use Illuminate\Support\Facades\Cache; |
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use Illuminate\Support\Facades\Storage; |
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use Carbon\Carbon; |
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class ImageController extends Controller |
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{ |
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/** |
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* Get image from storage |
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* |
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* @param Request $request |
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* @return file |
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*/ |
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public function getImage(Request $request) |
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{ |
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/** |
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* Check the cache |
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*/ |
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$cacheKey = 'image:' . $request->imageName . ':' . $request->imageExtension; |
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/** |
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* File cached |
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*/ |
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if (Cache::has($cacheKey)) { |
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$imageMeta = Cache::get($cacheKey); |
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} |
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/** |
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* File not cached |
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*/ |
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else{ |
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/** |
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* Get META information |
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*/ |
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$imageMeta = Image::where(['url' => $request->imageName, 'image_extension' => $request->imageExtension])->first(['image_mime_type', 'image_size', 'id', 'updated_at', 'image_etag']); |
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/** |
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* File does not exist |
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*/ |
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if(empty($imageMeta) == TRUE){ |
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App::abort(404); |
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} |
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/** |
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* Save meta information to cache |
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*/ |
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Cache::forever($cacheKey, $imageMeta); |
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} |
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/** |
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* Get filename |
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*/ |
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$filename = Helpers::getStorageFilename(env('APP_IMAGE_STORAGE_DIRECTORY', 'images'), $imageMeta->id); |
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/** |
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* Prepare stream |
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*/ |
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$stream = Storage::readStream($filename); |
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/** |
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* File headers |
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*/ |
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$headers = array( |
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'Content-Description' => 'File Transfer', |
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'Content-Type' => $imageMeta->image_mime_type, |
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'Content-Transfer-Encoding' => 'binary', |
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'Pragma' => 'public', |
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'Expires' => Carbon::createFromTimestamp(time()+3600)->toRfc2822String(), |
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'Last-Modified' => $imageMeta->updated_at->toRfc2822String(), |
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'Etag' => $imageMeta->image_etag, |
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); |
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/** |
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* Response code cached |
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*/ |
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if( (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] == $imageMeta->image_etag) |
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|| (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && @$_SERVER['HTTP_IF_MODIFIED_SINCE'] == $imageMeta->updated_at->toRfc2822String()) ){ |
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$responseCode = 304; |
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} |
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/** |
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* Response code not cached, but OK |
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*/ |
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else{ |
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$responseCode = 200; |
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} |
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/** |
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* Stream to browser |
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*/ |
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return Response::stream(function() use ($stream) { |
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fpassthru($stream); |
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}, $responseCode, $headers); |
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} |
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} |
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Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: