3 namespace BookStack\Uploads;
5 use BookStack\Exceptions\ImageUploadException;
8 use Illuminate\Contracts\Cache\Repository as Cache;
9 use Illuminate\Contracts\Filesystem\FileNotFoundException;
10 use Illuminate\Contracts\Filesystem\Filesystem as Storage;
11 use Illuminate\Filesystem\FilesystemAdapter;
12 use Illuminate\Filesystem\FilesystemManager;
13 use Illuminate\Support\Facades\DB;
14 use Illuminate\Support\Facades\Log;
15 use Illuminate\Support\Str;
16 use Intervention\Image\Exception\NotSupportedException;
17 use Intervention\Image\ImageManager;
18 use League\Flysystem\Util;
19 use Psr\SimpleCache\InvalidArgumentException;
20 use Symfony\Component\HttpFoundation\File\UploadedFile;
21 use Symfony\Component\HttpFoundation\StreamedResponse;
27 protected $storageUrl;
29 protected $fileSystem;
31 protected static $supportedExtensions = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
34 * ImageService constructor.
36 public function __construct(Image $image, ImageManager $imageTool, FilesystemManager $fileSystem, Cache $cache)
38 $this->image = $image;
39 $this->imageTool = $imageTool;
40 $this->fileSystem = $fileSystem;
41 $this->cache = $cache;
45 * Get the storage that will be used for storing images.
47 protected function getStorageDisk(string $imageType = ''): Storage
49 return $this->fileSystem->disk($this->getStorageDiskName($imageType));
53 * Check if local secure image storage (Fetched behind authentication)
54 * is currently active in the instance.
56 protected function usingSecureImages(): bool
58 return $this->getStorageDiskName('gallery') === 'local_secure_images';
62 * Change the originally provided path to fit any disk-specific requirements.
63 * This also ensures the path is kept to the expected root folders.
65 protected function adjustPathForStorageDisk(string $path, string $imageType = ''): string
67 $path = Util::normalizePath(str_replace('uploads/images/', '', $path));
69 if ($this->getStorageDiskName($imageType) === 'local_secure_images') {
73 return 'uploads/images/' . $path;
77 * Get the name of the storage disk to use.
79 protected function getStorageDiskName(string $imageType): string
81 $storageType = config('filesystems.images');
83 // Ensure system images (App logo) are uploaded to a public space
84 if ($imageType === 'system' && $storageType === 'local_secure') {
85 $storageType = 'local';
88 if ($storageType === 'local_secure') {
89 $storageType = 'local_secure_images';
96 * Saves a new image from an upload.
98 * @throws ImageUploadException
102 public function saveNewFromUpload(
103 UploadedFile $uploadedFile,
106 int $resizeWidth = null,
107 int $resizeHeight = null,
108 bool $keepRatio = true
110 $imageName = $uploadedFile->getClientOriginalName();
111 $imageData = file_get_contents($uploadedFile->getRealPath());
113 if ($resizeWidth !== null || $resizeHeight !== null) {
114 $imageData = $this->resizeImage($imageData, $resizeWidth, $resizeHeight, $keepRatio);
117 return $this->saveNew($imageName, $imageData, $type, $uploadedTo);
121 * Save a new image from a uri-encoded base64 string of data.
123 * @throws ImageUploadException
125 public function saveNewFromBase64Uri(string $base64Uri, string $name, string $type, int $uploadedTo = 0): Image
127 $splitData = explode(';base64,', $base64Uri);
128 if (count($splitData) < 2) {
129 throw new ImageUploadException('Invalid base64 image data provided');
131 $data = base64_decode($splitData[1]);
133 return $this->saveNew($name, $data, $type, $uploadedTo);
137 * Save a new image into storage.
139 * @throws ImageUploadException
141 public function saveNew(string $imageName, string $imageData, string $type, int $uploadedTo = 0): Image
143 $storage = $this->getStorageDisk($type);
144 $secureUploads = setting('app-secure-images');
145 $fileName = $this->cleanImageFileName($imageName);
147 $imagePath = '/uploads/images/' . $type . '/' . date('Y-m') . '/';
149 while ($storage->exists($this->adjustPathForStorageDisk($imagePath . $fileName, $type))) {
150 $fileName = Str::random(3) . $fileName;
153 $fullPath = $imagePath . $fileName;
154 if ($secureUploads) {
155 $fullPath = $imagePath . Str::random(16) . '-' . $fileName;
159 $this->saveImageDataInPublicSpace($storage, $this->adjustPathForStorageDisk($fullPath, $type), $imageData);
160 } catch (Exception $e) {
161 Log::error('Error when attempting image upload:' . $e->getMessage());
163 throw new ImageUploadException(trans('errors.path_not_writable', ['filePath' => $fullPath]));
167 'name' => $imageName,
169 'url' => $this->getPublicUrl($fullPath),
171 'uploaded_to' => $uploadedTo,
174 if (user()->id !== 0) {
175 $userId = user()->id;
176 $imageDetails['created_by'] = $userId;
177 $imageDetails['updated_by'] = $userId;
180 $image = $this->image->newInstance();
181 $image->forceFill($imageDetails)->save();
187 * Save image data for the given path in the public space, if possible,
188 * for the provided storage mechanism.
190 protected function saveImageDataInPublicSpace(Storage $storage, string $path, string $data)
192 $storage->put($path, $data);
194 // Set visibility when a non-AWS-s3, s3-like storage option is in use.
195 // Done since this call can break s3-like services but desired for other image stores.
196 // Attempting to set ACL during above put request requires different permissions
197 // hence would technically be a breaking change for actual s3 usage.
198 $usingS3 = strtolower(config('filesystems.images')) === 's3';
199 $usingS3Like = $usingS3 && !is_null(config('filesystems.disks.s3.endpoint'));
201 $storage->setVisibility($path, 'public');
206 * Clean up an image file name to be both URL and storage safe.
208 protected function cleanImageFileName(string $name): string
210 $name = str_replace(' ', '-', $name);
211 $nameParts = explode('.', $name);
212 $extension = array_pop($nameParts);
213 $name = implode('-', $nameParts);
214 $name = Str::slug($name);
216 if (strlen($name) === 0) {
217 $name = Str::random(10);
220 return $name . '.' . $extension;
224 * Checks if the image is a gif. Returns true if it is, else false.
226 protected function isGif(Image $image): bool
228 return strtolower(pathinfo($image->path, PATHINFO_EXTENSION)) === 'gif';
232 * Get the thumbnail for an image.
233 * If $keepRatio is true only the width will be used.
234 * Checks the cache then storage to avoid creating / accessing the filesystem on every check.
237 * @throws InvalidArgumentException
239 public function getThumbnail(Image $image, ?int $width, ?int $height, bool $keepRatio = false): string
241 if ($keepRatio && $this->isGif($image)) {
242 return $this->getPublicUrl($image->path);
245 $thumbDirName = '/' . ($keepRatio ? 'scaled-' : 'thumbs-') . $width . '-' . $height . '/';
246 $imagePath = $image->path;
247 $thumbFilePath = dirname($imagePath) . $thumbDirName . basename($imagePath);
249 if ($this->cache->has('images-' . $image->id . '-' . $thumbFilePath) && $this->cache->get('images-' . $thumbFilePath)) {
250 return $this->getPublicUrl($thumbFilePath);
253 $storage = $this->getStorageDisk($image->type);
254 if ($storage->exists($this->adjustPathForStorageDisk($thumbFilePath, $image->type))) {
255 return $this->getPublicUrl($thumbFilePath);
258 $thumbData = $this->resizeImage($storage->get($this->adjustPathForStorageDisk($imagePath, $image->type)), $width, $height, $keepRatio);
260 $this->saveImageDataInPublicSpace($storage, $this->adjustPathForStorageDisk($thumbFilePath, $image->type), $thumbData);
261 $this->cache->put('images-' . $image->id . '-' . $thumbFilePath, $thumbFilePath, 60 * 60 * 72);
263 return $this->getPublicUrl($thumbFilePath);
267 * Resize the image of given data to the specified size, and return the new image data.
269 * @throws ImageUploadException
271 protected function resizeImage(string $imageData, ?int $width, ?int $height, bool $keepRatio): string
274 $thumb = $this->imageTool->make($imageData);
275 } catch (ErrorException|NotSupportedException $e) {
276 throw new ImageUploadException(trans('errors.cannot_create_thumbs'));
280 $thumb->resize($width, $height, function ($constraint) {
281 $constraint->aspectRatio();
282 $constraint->upsize();
285 $thumb->fit($width, $height);
288 $thumbData = (string) $thumb->encode();
290 // Use original image data if we're keeping the ratio
291 // and the resizing does not save any space.
292 if ($keepRatio && strlen($thumbData) > strlen($imageData)) {
300 * Get the raw data content from an image.
302 * @throws FileNotFoundException
304 public function getImageData(Image $image): string
306 $storage = $this->getStorageDisk();
308 return $storage->get($this->adjustPathForStorageDisk($image->path, $image->type));
312 * Destroy an image along with its revisions, thumbnails and remaining folders.
316 public function destroy(Image $image)
318 $this->destroyImagesFromPath($image->path, $image->type);
323 * Destroys an image at the given path.
324 * Searches for image thumbnails in addition to main provided path.
326 protected function destroyImagesFromPath(string $path, string $imageType): bool
328 $path = $this->adjustPathForStorageDisk($path, $imageType);
329 $storage = $this->getStorageDisk($imageType);
331 $imageFolder = dirname($path);
332 $imageFileName = basename($path);
333 $allImages = collect($storage->allFiles($imageFolder));
335 // Delete image files
336 $imagesToDelete = $allImages->filter(function ($imagePath) use ($imageFileName) {
337 return basename($imagePath) === $imageFileName;
339 $storage->delete($imagesToDelete->all());
341 // Cleanup of empty folders
342 $foldersInvolved = array_merge([$imageFolder], $storage->directories($imageFolder));
343 foreach ($foldersInvolved as $directory) {
344 if ($this->isFolderEmpty($storage, $directory)) {
345 $storage->deleteDirectory($directory);
353 * Check whether a folder is empty.
355 protected function isFolderEmpty(Storage $storage, string $path): bool
357 $files = $storage->files($path);
358 $folders = $storage->directories($path);
360 return count($files) === 0 && count($folders) === 0;
364 * Delete gallery and drawings that are not within HTML content of pages or page revisions.
365 * Checks based off of only the image name.
366 * Could be much improved to be more specific but kept it generic for now to be safe.
368 * Returns the path of the images that would be/have been deleted.
370 public function deleteUnusedImages(bool $checkRevisions = true, bool $dryRun = true)
372 $types = ['gallery', 'drawio'];
375 $this->image->newQuery()->whereIn('type', $types)
376 ->chunk(1000, function ($images) use ($checkRevisions, &$deletedPaths, $dryRun) {
377 foreach ($images as $image) {
378 $searchQuery = '%' . basename($image->path) . '%';
379 $inPage = DB::table('pages')
380 ->where('html', 'like', $searchQuery)->count() > 0;
383 if ($checkRevisions) {
384 $inRevision = DB::table('page_revisions')
385 ->where('html', 'like', $searchQuery)->count() > 0;
388 if (!$inPage && !$inRevision) {
389 $deletedPaths[] = $image->path;
391 $this->destroy($image);
397 return $deletedPaths;
401 * Convert an image URI to a Base64 encoded string.
402 * Attempts to convert the URL to a system storage url then
403 * fetch the data from the disk or storage location.
404 * Returns null if the image data cannot be fetched from storage.
406 * @throws FileNotFoundException
408 public function imageUriToBase64(string $uri): ?string
410 $storagePath = $this->imageUrlToStoragePath($uri);
411 if (empty($uri) || is_null($storagePath)) {
415 $storagePath = $this->adjustPathForStorageDisk($storagePath);
416 $storage = $this->getStorageDisk();
418 if ($storage->exists($storagePath)) {
419 $imageData = $storage->get($storagePath);
422 if (is_null($imageData)) {
426 $extension = pathinfo($uri, PATHINFO_EXTENSION);
427 if ($extension === 'svg') {
428 $extension = 'svg+xml';
431 return 'data:image/' . $extension . ';base64,' . base64_encode($imageData);
435 * Check if the given path exists in the local secure image system.
436 * Returns false if local_secure is not in use.
438 public function pathExistsInLocalSecure(string $imagePath): bool
440 /** @var FilesystemAdapter $disk */
441 $disk = $this->getStorageDisk('gallery');
443 // Check local_secure is active
444 return $this->usingSecureImages()
445 && $disk instanceof FilesystemAdapter
446 // Check the image file exists
447 && $disk->exists($imagePath)
448 // Check the file is likely an image file
449 && strpos($disk->getMimetype($imagePath), 'image/') === 0;
453 * For the given path, if existing, provide a response that will stream the image contents.
455 public function streamImageFromStorageResponse(string $imageType, string $path): StreamedResponse
457 $disk = $this->getStorageDisk($imageType);
459 return $disk->response($path);
463 * Check if the given image extension is supported by BookStack.
464 * The extension must not be altered in this function. This check should provide a guarantee
465 * that the provided extension is safe to use for the image to be saved.
467 public static function isExtensionSupported(string $extension): bool
469 return in_array($extension, static::$supportedExtensions);
473 * Get a storage path for the given image URL.
474 * Ensures the path will start with "uploads/images".
475 * Returns null if the url cannot be resolved to a local URL.
477 private function imageUrlToStoragePath(string $url): ?string
479 $url = ltrim(trim($url), '/');
481 // Handle potential relative paths
482 $isRelative = strpos($url, 'http') !== 0;
484 if (strpos(strtolower($url), 'uploads/images') === 0) {
485 return trim($url, '/');
491 // Handle local images based on paths on the same domain
492 $potentialHostPaths = [
493 url('uploads/images/'),
494 $this->getPublicUrl('/uploads/images/'),
497 foreach ($potentialHostPaths as $potentialBasePath) {
498 $potentialBasePath = strtolower($potentialBasePath);
499 if (strpos(strtolower($url), $potentialBasePath) === 0) {
500 return 'uploads/images/' . trim(substr($url, strlen($potentialBasePath)), '/');
508 * Gets a public facing url for an image by checking relevant environment variables.
509 * If s3-style store is in use it will default to guessing a public bucket URL.
511 private function getPublicUrl(string $filePath): string
513 if (is_null($this->storageUrl)) {
514 $storageUrl = config('filesystems.url');
516 // Get the standard public s3 url if s3 is set as storage type
517 // Uses the nice, short URL if bucket name has no periods in otherwise the longer
518 // region-based url will be used to prevent http issues.
519 if ($storageUrl == false && config('filesystems.images') === 's3') {
520 $storageDetails = config('filesystems.disks.s3');
521 if (strpos($storageDetails['bucket'], '.') === false) {
522 $storageUrl = 'https://' . $storageDetails['bucket'] . '.s3.amazonaws.com';
524 $storageUrl = 'https://s3-' . $storageDetails['region'] . '.amazonaws.com/' . $storageDetails['bucket'];
528 $this->storageUrl = $storageUrl;
531 $basePath = ($this->storageUrl == false) ? url('/') : $this->storageUrl;
533 return rtrim($basePath, '/') . $filePath;