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<?php |
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/** |
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* @link http://www.newicon.net/neon |
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* @copyright Copyright (c) 28/11/2016 Newicon Ltd |
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* @license http://www.newicon.net/neon/license/ |
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*/ |
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namespace neon\firefly\controllers; |
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use Carbon\Carbon; |
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use neon\core\helpers\Arr; |
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use neon\core\helpers\Hash; |
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use neon\core\helpers\Str; |
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use neon\firefly\services\plupload\Receiver; |
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use neon\core\web\Response; |
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use yii\helpers\FileHelper; |
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use yii\web\HttpException; |
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class FileController extends \yii\web\Controller |
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{ |
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public function actionDestroyDeleted() |
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{ |
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return neon()->firefly->mediaManager->destroyDeleted(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function init() |
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{ |
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parent::init(); |
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// before doing anything we must turn off the session |
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// this controller is for stateless non session APIs |
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neon()->user->enableSession = false; |
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neon()->user->loginUrl = null; |
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neon()->getRequest()->enableCsrfValidation = false; |
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} |
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/** |
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* Show a file manager managed file |
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* |
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* /firefly/file/get?id=[fileuuid] |
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* /firefly/[fileuuid] |
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* @return \neon\core\web\Response |
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*/ |
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public function actionGet() |
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{ |
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$request = neon()->request; |
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$firefly = neon()->firefly; |
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$id = $request->get('id'); |
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if (!$firefly->fileManager->exists($id)) { |
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// show placeholder image - should be handled by image manager - controllers should not know |
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return neon()->response->sendFile(dirname(__DIR__) . '/assets/placeholder.jpg', 'No File', ['inline' => true]); |
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} |
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// as the url is unique for a file we can be aggressive about caching |
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// see if we already have this in cache and the browser already has it too |
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$this->handleNotModified(); |
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// set expiry information on the file |
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$meta = $firefly->fileManager->getMeta($id); |
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if ($meta['mime_type'] == 'image/svg') |
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$meta['mime_type'] = 'image/svg+xml'; |
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$this->sendCacheHeaders($meta['mime_type'], $meta['size'], $meta['updated_at'], md5($request->absoluteUrl), $meta['name']); |
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$download = $request->get('download', $request->get('dl', false)); |
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try { |
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// this can throw an error if the path is unknown |
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return $firefly->fileManager->sendFile($id, (bool) $download); |
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} catch (\Exception $e) { |
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// if path unknown respond with a blank placeholder |
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return neon()->response->sendFile(dirname(__DIR__) . '/assets/placeholder.jpg', 'No File', ['inline' => true]); |
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} |
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} |
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/** |
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* Alternative action url for getting images for more consistent interface |
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* |
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* @return \neon\core\web\Response |
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* @throws HttpException |
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*/ |
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public function actionImage() |
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{ |
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return $this->actionImg(); |
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} |
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/** |
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* Show a file manager managed image |
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* /mydomain.com/firefly/file/img?id=[fileuuid] |
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* @throws HttpException if id request parameter is not defined |
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* @return Response |
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*/ |
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public function actionImg() |
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{ |
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$id = neon()->request->getRequired('id'); |
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// create a unique request key - add v2 to force use of new cached version |
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$requestKey = neon()->request->absoluteUrl . 'v10'; |
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// see if we already have this in cache and the browser already has it too |
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// We want to remove the need to process images when ever possible |
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// Send not modified header if already cached |
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$this->handleNotModified($requestKey); |
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$image = $this->handleImageProcessing($requestKey, $id); |
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// This caches this whole request.... by generating the image file |
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// note we only have the id when originally asking for the image via `getImage()` |
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// Only images should ever be made public - these have been resaved as images by this point |
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// $url = $this->generatePublicFile($id, $image['image']); |
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// return $this->redirect($url); |
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neon()->response->format = Response::FORMAT_RAW; |
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$this->sendCacheHeaders($image['mime_type'], $image['size'], $image['updated_at'], $image['eTag'], basename($id)); |
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neon()->response->content = $image['image']; |
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return neon()->response; |
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} |
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public function handleImageProcessing($requestKey, $idOrUrl) |
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{ |
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// retrieve (or generate) from cache and return with appropriate caching headers |
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return neon()->firefly->getCache()->getOrSet($requestKey, function() use ($idOrUrl, $requestKey) { |
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$processedImage = neon()->firefly->imageManager->process($idOrUrl, neon()->request->get()); |
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$mimeType = finfo_buffer(finfo_open(FILEINFO_MIME_TYPE), $processedImage); |
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// svgs don't seem display in browsers without specifically the svg+xml mime type |
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if ($mimeType === 'image/svg') $mimeType = 'image/svg+xml'; |
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return [ |
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// recalculate the mime type in case was spoofed |
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'size' => strlen($processedImage), |
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'mime_type' => $mimeType, |
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'updated_at' => date("Y-m-d H:i:s"), |
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'image' => $processedImage, |
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'eTag' => md5($requestKey) |
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]; |
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}); |
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} |
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/** |
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* Another potential cache strategy to generate a static asset image file in a publicly accessible folder |
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* @param string $id - fileManager file id |
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* @param mixed $imageContent - the contents of the image |
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* @throws \yii\base\Exception |
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* @return string - the public url path |
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*/ |
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public function generatePublicFile($id, $imageContent) |
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{ |
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$dir = substr($id,0, 3); |
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$publicDir = neon()->getAlias("@webroot/assets/firefly/$dir"); |
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if (!file_exists($publicDir)) { |
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FileHelper::createDirectory($publicDir); |
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file_put_contents("$publicDir/$id", $imageContent); |
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} |
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return neon()->getAlias("@web/assets/firefly/$dir/$id"); |
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} |
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/** |
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* Send appropriate cache headers |
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* @param string $mime - mime type of file |
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* @param string|int $size - size in bytes of response |
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* @param string $modified - MySQL Datetime |
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* @param string $eTag - eTag token header to use |
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* @param string $name - filename string to use in content disposition header |
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*/ |
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public function sendCacheHeaders($mime, $size, $modified, $eTag, $name) |
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{ |
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$headers = neon()->response->headers; |
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$headers->add('Accept-Ranges', 'bytes'); |
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$headers->add('Content-Type', $mime); |
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$headers->add('Content-Length', $size); |
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$headers->add('Access-Control-Allow-Origin', '*'); |
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$headers->add('Last-Modified', Carbon::createFromFormat('Y-m-d H:i:s', $modified)->toRfc1123String()); |
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$headers->add('Cache-Control', 'private, max-age=30000000, immutable, only-if-cached'); |
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$headers->add('Expires', Carbon::now()->addSeconds(30000000)->toRfc1123String()); |
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$headers->add('ETag', $eTag); |
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$headers->add('Content-Disposition', 'inline; filename="'.$name.'"'); |
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} |
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/** |
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* Handle a request that can return a 304 not modified header |
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* @param bool|string $cacheKey - default false - if cache key is specified |
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*/ |
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public function handleNotModified($cacheKey=false) |
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{ |
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$requestHeaders = neon()->request->headers; |
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$browserHasCache = (isset($requestHeaders['If-Modified-Since']) || isset($requestHeaders['If-None-Match'])); |
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if ($browserHasCache && (!$cacheKey || neon()->firefly->getCache()->exists($cacheKey))) { |
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$this->sendNotModifiedHeaders(); |
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} |
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} |
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/** |
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* Send appropriate headers for 304 Not Modified header |
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*/ |
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public function sendNotModifiedHeaders() |
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{ |
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header($_SERVER['SERVER_PROTOCOL'].' 304 Not modified'); |
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header('Cache-Control: private, max-age=30000000, immutable, only-if-cached'); |
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header('Expires: ' . Carbon::now()->addYear(10)->toRfc1123String()); |
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exit; |
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} |
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/** |
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* API endpoint for plupload |
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* @return array |
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*/ |
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public function actionUpload() |
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{ |
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$r = new Receiver(neon()->request); |
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return $r->receiveToFirefly('file'); |
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} |
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} |
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