File manager

File manager - Edit - /home/web/vm-3fadc827.na4u.ru/www/bitrix/modules/main/lib/ui/viewer/previewmanager.php

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<?php namespace Bitrix\Main\UI\Viewer; use Bitrix\Main\Application; use Bitrix\Main\Context; use Bitrix\Main\Event; use Bitrix\Main\EventResult; use Bitrix\Main\HttpRequest; use Bitrix\Main\Loader; use Bitrix\Main\SystemException; use Bitrix\Main\Type\DateTime; use Bitrix\Main\UI\Viewer\Transformation\TransformerManager; use Bitrix\Main\Web\MimeType; use Bitrix\Main\Web\Uri; use Bitrix\Main\Security; use Bitrix\Main\Engine\Response; final class PreviewManager { const GET_KEY_TO_SEND_PREVIEW_CONTENT = 'ibxPreview'; const GET_KEY_TO_SHOW_IMAGE = 'ibxShowImage'; const HEADER_TO_SEND_PREVIEW = 'BX-Viewer'; const HEADER_TO_RESIZE_IMAGE = 'BX-Viewer-image'; const HEADER_TO_GET_SOURCE = 'BX-Viewer-src'; const HEADER_TO_RUN_FORCE_TRANSFORMATION = 'BX-Viewer-force-transformation'; const HEADER_TO_CHECK_TRANSFORMATION = 'BX-Viewer-check-transformation'; /** @var TransformerManager / private $transformer; private $rendererList = []; private static $disableCatchingViewByUser = false; /* * @var HttpRequest / private $httpRequest; public function __construct(HttpRequest $httpRequest = null) { $this->httpRequest = $httpRequest? : Context::getCurrent()->getRequest(); $this->transformer = $this->buildTransformer(); $this->buildViewRendererList(); } private function buildTransformer() { if (!Loader::includeModule('transformer')) { return null; } return new TransformerManager(); } private function buildViewRendererList() { $default = [ Renderer\Pdf::class, Renderer\Video::class, Renderer\Audio::class, Renderer\Image::class, Renderer\Code::class, ]; $event = new Event('main', 'onPreviewRendererBuildList'); $event->send(); $additionalList = []; foreach ($event->getResults() as $result) { if ($result->getType() != EventResult::SUCCESS) { continue; } $result = $result->getParameters(); if (!is_array($result)) { throw new SystemException('Wrong event result. Must be array.'); } foreach ($result as $class) { if (!is_string($class) \|\| !class_exists($class)) { throw new SystemException('Wrong event result. There is not a class.'); } if (!is_subclass_of($class, Renderer\Renderer::class, true)) { throw new SystemException("Wrong event result. {$class} is not a subclass of " . Renderer\Renderer::class); } $additionalList[] = $class; } } $this->rendererList = array_merge($default, $additionalList); } public static function disableCatchingViewByUser() { self::$disableCatchingViewByUser = true; } public static function enableCatchingViewByUser() { self::$disableCatchingViewByUser = false; } public static function isDisabledCatchingViewByUser() { return (bool)self::$disableCatchingViewByUser; } public function isInternalRequest($file, $options) { if (self::isDisabledCatchingViewByUser()) { return false; } if (!is_array($file) \|\| empty($file['ID'])) { return false; } if (!empty($options['prevent_work_with_preview'])) { return false; } if ($this->httpRequest->get(self::GET_KEY_TO_SEND_PREVIEW_CONTENT)) { return true; } if ($this->httpRequest->get(self::GET_KEY_TO_SHOW_IMAGE)) { return true; } if ($this->httpRequest->getHeader(self::HEADER_TO_SEND_PREVIEW)) { return true; } if ($this->httpRequest->getHeader(self::HEADER_TO_RUN_FORCE_TRANSFORMATION)) { return true; } if ($this->httpRequest->getHeader(self::HEADER_TO_CHECK_TRANSFORMATION)) { return true; } if ($this->httpRequest->getHeader(self::HEADER_TO_RESIZE_IMAGE)) { return true; } return false; } public function processViewByUserRequest($file, $options) { self::disableCatchingViewByUser(); if ($this->httpRequest->get(self::GET_KEY_TO_SEND_PREVIEW_CONTENT)) { $response = $this->sendPreviewContent($file, $options); } elseif ($this->httpRequest->get(self::GET_KEY_TO_SHOW_IMAGE)) { $response = $this->showImage($file, $options); } elseif ($this->httpRequest->getHeader(self::HEADER_TO_RUN_FORCE_TRANSFORMATION)) { $response = $this->sendPreview($file, true); } elseif ($this->httpRequest->getHeader(self::HEADER_TO_CHECK_TRANSFORMATION)) { $response = $this->checkTransformation($file); } elseif ($this->httpRequest->getHeader(self::HEADER_TO_SEND_PREVIEW)) { $response = $this->sendPreview($file); } elseif ($this->httpRequest->getHeader(self::HEADER_TO_RESIZE_IMAGE)) { $response = $this->sendResizedImage($file); } if ($response instanceof Response\BFile && isset($options['cache_time'])) { $response->setCacheTime($options['cache_time']); } if ($response instanceof \Bitrix\Main\Response) { /* @global \CMain $APPLICATION / global $APPLICATION; $APPLICATION->RestartBuffer(); Application::getInstance()->end(0, $response); } } protected function sendPreviewContent($file, $options) { $possiblePreviewFileId = $this->unsignFileId($this->httpRequest->get(self::GET_KEY_TO_SEND_PREVIEW_CONTENT)); $filePreview = $this->getFilePreviewEntryByFileId($file['ID']); if (!$filePreview \|\| empty($filePreview['PREVIEW_ID']) \|\| $filePreview['PREVIEW_ID'] != $possiblePreviewFileId) { return null; } FilePreviewTable::update($filePreview['ID'], [ 'TOUCHED_AT' => new DateTime(), ]); //get name for preview file return Response\BFile::createByFileId( $filePreview['PREVIEW_ID'], $file['ORIGINAL_NAME'] ); } protected function showImage($file, $options) { if (!is_array($options)) { $options = []; } $options['force_download'] = false; $options['prevent_work_with_preview'] = true; \CFile::viewByUser($file, $options); } protected function sendResizedImage($file) { $fileView = $this->getByImage($file['ID'], $this->getSourceUri()); if (!$fileView) { return null; } return $fileView->render(); } protected function prepareRenderParameters($file) { $getContentType = function() use ($file){ $filePreviewData = $this->getViewFileData($file); if (!$filePreviewData) { return null; } return $filePreviewData['CONTENT_TYPE']; }; $getSourceUri = function() use ($file){ $filePreviewData = $this->getViewFileData($file); if (!$filePreviewData) { return null; } return $this->getSourceUri()->addParams([ self::GET_KEY_TO_SEND_PREVIEW_CONTENT => $this->signFileId($filePreviewData['ID']), ]); }; return [ 'alt' => [ 'contentType' => $getContentType->bindTo($this, $this), 'sourceUri' => $getSourceUri->bindTo($this, $this), ], ]; } protected function checkTransformation($file) { return new Response\AjaxJson([ 'transformation' => (bool)$this->getViewFileData($file), ]); } protected function sendPreview($file, $forceTransformation = false) { $render = $this->buildRenderByFile( $file['ORIGINAL_NAME'], $file['CONTENT_TYPE'], $this->getSourceUri(), $this->prepareRenderParameters($file) ); if ($render instanceof Renderer\Stub \|\| $forceTransformation) { $filePreviewData = $this->getViewFileData($file); if ($filePreviewData) { $sourceUri = $this->getSourceUri()->addParams([ self::GET_KEY_TO_SEND_PREVIEW_CONTENT => $this->signFileId($filePreviewData['ID']), ]); $render = $this->buildRenderByFile( $filePreviewData['ORIGINAL_NAME'], $filePreviewData['CONTENT_TYPE'], $sourceUri ); } else { $generatePreview = $this->generatePreview($file['ID']); if ($generatePreview->isSuccess()) { $render = null; return Response\AjaxJson::createSuccess($generatePreview->getData()); } return Response\AjaxJson::createError($generatePreview->getErrorCollection()); } } if ($render) { return Response\AjaxJson::createSuccess([ 'html' => $render->render(), 'data' => $render->getData(), ]); } return Response\AjaxJson::createError(); } public function setPreviewImageId($fileId, $previewImageId) { $alreadyPreview = $this->getFilePreviewEntryByFileId($fileId); if (isset($alreadyPreview['ID'])) { $result = FilePreviewTable::update($fileId, [ 'PREVIEW_IMAGE_ID' => $previewImageId, ]); } else { $result = FilePreviewTable::add([ 'FILE_ID' => $fileId, 'PREVIEW_IMAGE_ID' => $previewImageId, ]); } return $result; } public function generatePreview($fileId) { if (!$this->transformer) { return null; } //todo return status (OK, WAIT, ERROR) or some result. return $this->transformer->transform($fileId); } protected function getSourceUri() { $sourceSrc = $this->httpRequest->getHeader(self::HEADER_TO_GET_SOURCE); if (!$sourceSrc) { $sourceSrc = $this->httpRequest->getRequestUri(); } $sourceUri = new Uri($sourceSrc); return $sourceUri; } protected function signFileId($fileId) { $signer = new Security\Sign\Signer; return $signer->sign( base64_encode(serialize($fileId)), 'previewfile' ); } protected function unsignFileId($signedString) { $signer = new Security\Sign\Signer; $unsignedParameters = $signer->unsign( $signedString, 'previewfile' ); return unserialize(base64_decode($unsignedParameters), ['allowed_classes' => false]); } public function getByImage($fileId, Uri $sourceUri) { $fileData = $this->getFileData($fileId); if (!$fileData) { return null; } $renderer = $this->buildRenderByFile( $fileData['ORIGINAL_NAME'], $fileData['CONTENT_TYPE'], $sourceUri, [ 'originalImage' => $fileData, ] ); if (!($renderer instanceof Renderer\Image)) { return null; } return $renderer; } protected function getViewFileData(array $fileData) { static $cache = []; if (empty($fileData['ID'])) { return null; } if (isset($cache[$fileData['ID']]) \|\| array_key_exists($fileData['ID'], $cache)) { return $cache[$fileData['ID']]; } $filePreview = $this->getFilePreviewEntryByFileId($fileData['ID']); if (!$filePreview) { $cache[$fileData['ID']] = null; return null; } $cache[$fileData['ID']] = $this->getFileData($filePreview['PREVIEW_ID']); return $cache[$fileData['ID']]; } protected function getFilePreviewEntryByFileId($fileId) { $row = FilePreviewTable::getList([ 'filter' => [ '=FILE_ID' => $fileId, ], 'limit' => 1, ])->fetch(); return $row; } protected function buildRenderByFile($originalName, $contentType, Uri $sourceUri, array $options = []) { $options['contentType'] = $contentType; $rendererClass = $this->getRenderClassByFile([ 'contentType' => $contentType, 'originalName' => $originalName, ]); $reflectionClass = new \ReflectionClass($rendererClass); /* @see \Bitrix\Main\UI\Viewer\Renderer\Renderer::__construct / return $reflectionClass->newInstance($originalName, $sourceUri, $options); } public function getRenderClassByFile(array $file) { $contentType = $file['contentType']; $originalName = $file['originalName']; $rendererClass = $this->findRenderClassByContentType($contentType); if (!$rendererClass) { $contentTypeByName = MimeType::getByFilename($originalName); $rendererClass = $this->findRenderClassByContentType($contentTypeByName); } $rendererClass = $rendererClass? : Renderer\Stub::class; if ($this->shouldRestrictBySize($file, $rendererClass)) { return Renderer\RestrictedBySize::class; } return $rendererClass; } private function shouldRestrictBySize(array $file, $rendererClass) { if (!isset($file['size'])) { return false; } $size = $file['size']; $restriction = $rendererClass::getSizeRestriction(); if ($restriction !== null && $size !== null && $size > $restriction) { return true; } return false; } private function findRenderClassByContentType($contentType) { foreach ($this->rendererList as $rendererClass) { /* @var Renderer\Renderer $rendererClass / if (in_array($contentType, $rendererClass::getAllowedContentTypes(), true)) { return $rendererClass; } } return null; } /* * Temporary dirty hack. It is here while we do not solve the problem of race conditions in b_file managed cache. * Get file data from b_file on $fileId. * * @param int $fileId * @param bool $cacheCleaned * @return array\|false */ protected function getFileData($fileId, $cacheCleaned = false) { $fileId = (int)$fileId; $fileData = \CFile::GetFileArray($fileId); if ($fileData === false && !$cacheCleaned) { global $DB; $strSql = "SELECT ID FROM b_file WHERE ID=" . $fileId; $dbResult = $DB->Query($strSql, false, "FILE: " . __FILE__ . "<br>LINE: " . __LINE__); if ($dbData = $dbResult->Fetch()) { \CFile::CleanCache($fileId); return $this->getFileData($fileId, true); } } return $fileData; } }

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