Initial commit

application/Espo/EntryPoints/Attachment.php

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+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\EntryPoints;
+
+use Espo\Core\Utils\Metadata;
+use Espo\Entities\Attachment as AttachmentEntity;
+use Espo\Core\Acl;
+use Espo\Core\Api\Request;
+use Espo\Core\Api\Response;
+use Espo\Core\EntryPoint\EntryPoint;
+use Espo\Core\Exceptions\BadRequest;
+use Espo\Core\Exceptions\Forbidden;
+use Espo\Core\Exceptions\NotFound;
+use Espo\Core\FileStorage\Manager as FileStorageManager;
+use Espo\Core\ORM\EntityManager;
+
+class Attachment implements EntryPoint
+{
+    public function __construct(
+        private FileStorageManager $fileStorageManager,
+        private EntityManager $entityManager,
+        private Acl $acl,
+        private Metadata $metadata
+    ) {}
+
+    public function run(Request $request, Response $response): void
+    {
+        $id = $request->getQueryParam('id');
+
+        if (!$id) {
+            throw new BadRequest("No id.");
+        }
+
+        $attachment = $this->entityManager
+            ->getRDBRepositoryByClass(AttachmentEntity::class)
+            ->getById($id);
+
+        if (!$attachment) {
+            throw new NotFound("Attachment not found.");
+        }
+
+        if (!$this->acl->checkEntity($attachment)) {
+            throw new Forbidden("No access to attachment.");
+        }
+
+        if (!$this->fileStorageManager->exists($attachment)) {
+            throw new NotFound("File not found.");
+        }
+
+        $fileType = $attachment->getType();
+
+        if (!in_array($fileType, $this->getAllowedFileTypeList())) {
+            throw new Forbidden("Not allowed file type '{$fileType}'.");
+        }
+
+        if ($attachment->isBeingUploaded()) {
+            throw new Forbidden("Attachment is being-uploaded.");
+        }
+
+        if ($fileType) {
+            $response->setHeader('Content-Type', $fileType);
+        }
+
+        $stream = $this->fileStorageManager->getStream($attachment);
+
+        $size = $stream->getSize() ?? $this->fileStorageManager->getSize($attachment);
+
+        $response
+            ->setHeader('Content-Length', (string) $size)
+            ->setHeader('Cache-Control', 'private, max-age=864000, immutable')
+            ->setHeader('Content-Security-Policy', "default-src 'self'")
+            ->setBody($stream);
+    }
+
+    /**
+     * @return string[]
+     */
+    private function getAllowedFileTypeList(): array
+    {
+        return $this->metadata->get(['app', 'image', 'allowedFileTypeList']) ?? [];
+    }
+}