Initial Upload
This commit is contained in:
Matt Batchelder
340
lib/Widget/Render/WidgetDownloader.php
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340
lib/Widget/Render/WidgetDownloader.php
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<?php
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/*
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* Copyright (C) 2025 Xibo Signage Ltd
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*
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* Xibo - Digital Signage - https://xibosignage.com
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*
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* This file is part of Xibo.
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*
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* Xibo is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* Xibo is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Xibo. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace Xibo\Widget\Render;
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use GuzzleHttp\Psr7\LimitStream;
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use GuzzleHttp\Psr7\Stream;
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use Intervention\Image\ImageManagerStatic as Img;
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use Psr\Log\LoggerInterface;
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use Slim\Http\Response as Response;
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use Slim\Http\ServerRequest as Request;
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use Xibo\Entity\Media;
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use Xibo\Helper\HttpCacheProvider;
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use Xibo\Support\Exception\InvalidArgumentException;
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use Xibo\Support\Exception\NotFoundException;
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use Xibo\Support\Sanitizer\SanitizerInterface;
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/**
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* A helper class to download widgets from the library (as media files)
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*/
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class WidgetDownloader
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{
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/** @var LoggerInterface */
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private LoggerInterface $logger;
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/**
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* @param string $libraryLocation Library location
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* @param string $sendFileMode Send file mode
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* @param int $resizeLimit CMS resize limit
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*/
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public function __construct(
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private readonly string $libraryLocation,
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private readonly string $sendFileMode,
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private readonly int $resizeLimit
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) {
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}
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/**
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* @param \Psr\Log\LoggerInterface $logger
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* @return $this
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*/
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public function useLogger(LoggerInterface $logger): WidgetDownloader
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{
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$this->logger = $logger;
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return $this;
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}
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/**
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* Return File
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* @param \Xibo\Entity\Media $media
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* @param \Slim\Http\ServerRequest $request
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* @param \Slim\Http\Response $response
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* @param string|null $contentType An optional content type, if provided the attachment is ignored
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* @param string|null $attachment An optional attachment, defaults to the stored file name (storedAs)
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* @return \Slim\Http\Response
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*/
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public function download(
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Media $media,
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Request $request,
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Response $response,
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?string $contentType = null,
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?string $attachment = null
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): Response {
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$this->logger->debug('widgetDownloader::download: Download for mediaId ' . $media->mediaId);
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// The file path
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$libraryPath = $this->libraryLocation . $media->storedAs;
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$this->logger->debug('widgetDownloader::download: ' . $libraryPath . ', ' . $contentType);
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// Set some headers
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$headers = [];
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$fileSize = filesize($libraryPath);
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$headers['Content-Length'] = $fileSize;
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// If we have been given a content type, then serve that to the browser.
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if ($contentType !== null) {
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$headers['Content-Type'] = $contentType;
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} else {
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// This widget is expected to output a file - usually this is for file based media
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// Get the name with library
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$attachmentName = empty($attachment) ? $media->storedAs : $attachment;
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// Issue some headers
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$response = HttpCacheProvider::withEtag($response, $media->md5);
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$response = HttpCacheProvider::withExpires($response, '+1 week');
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$headers['Content-Type'] = 'application/octet-stream';
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$headers['Content-Transfer-Encoding'] = 'Binary';
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$headers['Content-disposition'] = 'attachment; filename="' . $attachmentName . '"';
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}
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// Output the file
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if ($this->sendFileMode === 'Apache') {
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// Send via Apache X-Sendfile header?
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$headers['X-Sendfile'] = $libraryPath;
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} else if ($this->sendFileMode === 'Nginx') {
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// Send via Nginx X-Accel-Redirect?
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$headers['X-Accel-Redirect'] = '/download/' . $media->storedAs;
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}
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// Should we output the file via the application stack, or directly by reading the file.
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if ($this->sendFileMode == 'Off') {
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// Return the file with PHP
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$this->logger->debug('download: Returning Stream with response body, sendfile off.');
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$stream = new Stream(fopen($libraryPath, 'r'));
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$start = 0;
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$end = $fileSize - 1;
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$rangeHeader = $request->getHeaderLine('Range');
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if ($rangeHeader !== '') {
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$this->logger->debug('download: Handling Range request, header: ' . $rangeHeader);
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if (preg_match('/bytes=(\d+)-(\d*)/', $rangeHeader, $matches)) {
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$start = (int) $matches[1];
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$end = $matches[2] !== '' ? (int) $matches[2] : $end;
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if ($start > $end || $end >= $fileSize) {
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return $response
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->withStatus(416)
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->withHeader('Content-Range', 'bytes */' . $fileSize);
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}
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}
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$headers['Content-Range'] = 'bytes ' . $start . '-' . $end . '/' . $fileSize;
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$headers['Content-Length'] = $end - $start + 1;
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$response = $response
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->withBody(new LimitStream($stream, $end - $start + 1, $start))
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->withStatus(206);
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} else {
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$response = $response->withBody($stream);
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}
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} else {
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$this->logger->debug('Using sendfile to return the file, only output headers.');
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}
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// Add the headers we've collected to our response
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foreach ($headers as $header => $value) {
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$response = $response->withHeader($header, $value);
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}
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return $response;
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}
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/**
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* Download a thumbnail for the given media
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* @param \Xibo\Entity\Media $media
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* @param \Slim\Http\Response $response
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* @param string|null $errorThumb
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* @return \Slim\Http\Response
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*/
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public function thumbnail(
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Media $media,
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Response $response,
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?string $errorThumb = null
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): Response {
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// Our convention is to upload media covers in {mediaId}_{mediaType}cover.png
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// and then thumbnails in tn_{mediaId}_{mediaType}cover.png
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// unless we are an image module, which is its own image, and would then have a thumbnail in
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// tn_{mediaId}_{mediaType}cover.png
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try {
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$width = 120;
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$height = 120;
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if ($media->mediaType === 'image') {
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$filePath = $this->libraryLocation . $media->storedAs;
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$thumbnailFilePath = $this->libraryLocation . 'tn_' . $media->storedAs;
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} else {
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$filePath = $this->libraryLocation . $media->mediaId . '_'
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. $media->mediaType . 'cover.png';
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$thumbnailFilePath = $this->libraryLocation . 'tn_' . $media->mediaId . '_'
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. $media->mediaType . 'cover.png';
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// A video cover might not exist
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if (!file_exists($filePath)) {
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throw new NotFoundException();
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}
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}
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// Does the thumbnail exist already?
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Img::configure(['driver' => 'gd']);
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$img = null;
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$regenerate = true;
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if (file_exists($thumbnailFilePath)) {
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$img = Img::make($thumbnailFilePath);
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if ($img->width() === $width || $img->height() === $height) {
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// Correct cache
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$regenerate = false;
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}
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$response = $response->withHeader('Content-Type', $img->mime());
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}
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if ($regenerate) {
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// Check that our source image is not too large
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$imageInfo = getimagesize($filePath);
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// Make sure none of the sides are greater than allowed
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if ($this->resizeLimit > 0
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&& ($imageInfo[0] > $this->resizeLimit || $imageInfo[1] > $this->resizeLimit)
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) {
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throw new InvalidArgumentException(__('Image too large'));
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}
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// Get the full image and make a thumbnail
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$img = Img::make($filePath);
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$img->resize($width, $height, function ($constraint) {
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$constraint->aspectRatio();
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});
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$img->save($thumbnailFilePath);
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$response = $response->withHeader('Content-Type', $img->mime());
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}
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// Output Etag
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$response = HttpCacheProvider::withEtag($response, md5_file($thumbnailFilePath));
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$response->write($img->encode());
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} catch (\Exception) {
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$this->logger->debug('thumbnail: exception raised.');
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if ($errorThumb !== null) {
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$img = Img::make($errorThumb);
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$response->write($img->encode());
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// Output the mime type
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$response = $response->withHeader('Content-Type', $img->mime());
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}
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}
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return $response;
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}
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/**
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* Output an image preview
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* @param \Xibo\Support\Sanitizer\SanitizerInterface $params
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* @param string $filePath
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* @param \Slim\Http\Response $response
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* @param string|null $errorThumb
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* @return \Slim\Http\Response
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* @throws \Xibo\Support\Exception\InvalidArgumentException
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*/
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public function imagePreview(
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SanitizerInterface $params,
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string $filePath,
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Response $response,
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?string $errorThumb = null
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): Response {
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// Image previews call for dynamically generated images as various sizes
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// for example a background image will stretch to the entire region
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// an image widget may be aspect, fit or scale
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try {
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$filePath = $this->libraryLocation . $filePath;
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// Does it exist?
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if (!file_exists($filePath)) {
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throw new NotFoundException(__('File not found'));
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}
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// Check that our source image is not too large
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$imageInfo = getimagesize($filePath);
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// Make sure none of the sides are greater than allowed
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if ($this->resizeLimit > 0
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&& ($imageInfo[0] > $this->resizeLimit || $imageInfo[1] > $this->resizeLimit)
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) {
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throw new InvalidArgumentException(__('Image too large'));
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}
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// Continue to output at the desired size
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$width = intval($params->getDouble('width'));
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$height = intval($params->getDouble('height'));
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$proportional = !$params->hasParam('proportional')
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|| $params->getCheckbox('proportional') == 1;
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$fit = $proportional && $params->getCheckbox('fit') === 1;
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// only use upsize constraint, if we the requested dimensions are larger than resize limit.
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$useUpsizeConstraint = max($width, $height) > $this->resizeLimit;
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$this->logger->debug('Whole file: ' . $filePath
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. ' requested with Width and Height ' . $width . ' x ' . $height
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. ', proportional: ' . var_export($proportional, true)
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. ', fit: ' . var_export($fit, true)
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. ', upsizeConstraint ' . var_export($useUpsizeConstraint, true));
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// Does the thumbnail exist already?
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Img::configure(['driver' => 'gd']);
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$img = Img::make($filePath);
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// Output a specific width/height
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if ($width > 0 && $height > 0) {
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if ($fit) {
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$img->fit($width, $height);
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} else {
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$img->resize($width, $height, function ($constraint) use ($proportional, $useUpsizeConstraint) {
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if ($proportional) {
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$constraint->aspectRatio();
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}
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if ($useUpsizeConstraint) {
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$constraint->upsize();
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}
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});
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}
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}
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$response->write($img->encode());
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$response = HttpCacheProvider::withExpires($response, '+1 week');
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$response = $response->withHeader('Content-Type', $img->mime());
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} catch (\Exception $e) {
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if ($errorThumb !== null) {
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$img = Img::make($errorThumb);
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$response->write($img->encode());
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$response = $response->withHeader('Content-Type', $img->mime());
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} else {
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$this->logger->error('Cannot parse image: ' . $e->getMessage());
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throw new InvalidArgumentException(__('Cannot parse image.'), 'storedAs');
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}
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}
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return $response;
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}
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}
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