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application/Espo/Tools/Attachment/UploadUrlService.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\Tools\Attachment;
+
+use Espo\Core\Exceptions\Error;
+use Espo\Core\Exceptions\ErrorSilent;
+use Espo\Core\Exceptions\Forbidden;
+use Espo\Core\Exceptions\ForbiddenSilent;
+use Espo\Core\Utils\File\MimeType;
+use Espo\Core\Utils\Metadata;
+use Espo\Core\Utils\Security\UrlCheck;
+use Espo\Entities\Attachment as Attachment;
+use Espo\ORM\EntityManager;
+use Espo\Repositories\Attachment as AttachmentRepository;
+
+class UploadUrlService
+{
+    private AccessChecker $accessChecker;
+    private Metadata $metadata;
+    private EntityManager $entityManager;
+    private MimeType $mimeType;
+    private DetailsObtainer $detailsObtainer;
+
+    public function __construct(
+        AccessChecker $accessChecker,
+        Metadata $metadata,
+        EntityManager $entityManager,
+        MimeType $mimeType,
+        DetailsObtainer $detailsObtainer,
+        private UrlCheck $urlCheck
+    ) {
+        $this->accessChecker = $accessChecker;
+        $this->metadata = $metadata;
+        $this->entityManager = $entityManager;
+        $this->mimeType = $mimeType;
+        $this->detailsObtainer = $detailsObtainer;
+    }
+
+    /**
+     * Upload an image from and URL and store as attachment.
+     *
+     * @throws Forbidden
+     * @throws Error
+     */
+    public function uploadImage(string $url, FieldData $data): Attachment
+    {
+        if (!$this->urlCheck->isNotInternalUrl($url)) {
+            throw new ForbiddenSilent("Not allowed URL.");
+        }
+
+        $attachment = $this->getAttachmentRepository()->getNew();
+
+        $this->accessChecker->check($data);
+
+        [$type, $contents] = $this->getImageDataByUrl($url) ?? [null, null];
+
+        if (!$type || !$contents) {
+            throw new ErrorSilent("Bad image data.");
+        }
+
+        $attachment->set([
+            'name' => $url,
+            'type' => $type,
+            'contents' => $contents,
+            'role' => Attachment::ROLE_ATTACHMENT,
+        ]);
+
+        $attachment->set('parentType', $data->getParentType());
+        $attachment->set('relatedType', $data->getRelatedType());
+        $attachment->set('field', $data->getField());
+
+        $size = mb_strlen($contents, '8bit');
+        $maxSize = $this->detailsObtainer->getUploadMaxSize($attachment);
+
+        if ($maxSize && $size > $maxSize) {
+            throw new Error("File size should not exceed {$maxSize}Mb.");
+        }
+
+        $this->getAttachmentRepository()->save($attachment);
+
+        $attachment->clear('contents');
+
+        return $attachment;
+    }
+
+    /**
+     * @param string $url
+     * @return ?array{string, string} A type and contents.
+     */
+    private function getImageDataByUrl(string $url): ?array
+    {
+        $type = null;
+
+        if (!function_exists('curl_init')) {
+            return null;
+        }
+
+        $opts = [];
+
+        $httpHeaders = [];
+        $httpHeaders[] = 'Expect:';
+
+        $opts[\CURLOPT_URL]  = $url;
+        $opts[\CURLOPT_HTTPHEADER] = $httpHeaders;
+        $opts[\CURLOPT_CONNECTTIMEOUT] = 10;
+        $opts[\CURLOPT_TIMEOUT] = 10;
+        $opts[\CURLOPT_HEADER] = true;
+        $opts[\CURLOPT_VERBOSE] = true;
+        $opts[\CURLOPT_SSL_VERIFYPEER] = true;
+        $opts[\CURLOPT_SSL_VERIFYHOST] = 2;
+        $opts[\CURLOPT_RETURNTRANSFER] = true;
+        // Prevents Server Side Request Forgery by redirecting to an internal host.
+        $opts[\CURLOPT_FOLLOWLOCATION] = false;
+        $opts[\CURLOPT_MAXREDIRS] = 2;
+        $opts[\CURLOPT_IPRESOLVE] = \CURL_IPRESOLVE_V4;
+        $opts[\CURLOPT_PROTOCOLS] = \CURLPROTO_HTTPS | \CURLPROTO_HTTP;
+        $opts[\CURLOPT_REDIR_PROTOCOLS] = \CURLPROTO_HTTPS;
+
+        $ch = curl_init();
+
+        curl_setopt_array($ch, $opts);
+
+        /** @var string|false $response */
+        $response = curl_exec($ch);
+
+        if ($response === false) {
+            curl_close($ch);
+
+            return null;
+        }
+
+        $headerSize = curl_getinfo($ch, \CURLINFO_HEADER_SIZE);
+
+        $header = substr($response, 0, $headerSize);
+        $body = substr($response, $headerSize);
+
+        $headLineList = explode("\n", $header);
+
+        foreach ($headLineList as $i => $line) {
+            if ($i === 0) {
+                continue;
+            }
+
+            if (strpos(strtolower($line), strtolower('Content-Type:')) === 0) {
+                $part = trim(substr($line, 13));
+
+                if ($part) {
+                    $type = trim(explode(";", $part)[0]);
+                }
+            }
+        }
+
+        if (!$type) {
+            /** @var string $extension */
+            $extension = preg_replace('#\?.*#', '', pathinfo($url, \PATHINFO_EXTENSION));
+
+            $type = $this->mimeType->getMimeTypeByExtension($extension);
+        }
+
+        curl_close($ch);
+
+        if (!$type) {
+            return null;
+        }
+
+        /** @var string[] $imageTypeList */
+        $imageTypeList = $this->metadata->get(['app', 'image', 'allowedFileTypeList']) ?? [];
+
+        if (!in_array($type, $imageTypeList)) {
+            return null;
+        }
+
+        return [$type, $body];
+    }
+
+    private function getAttachmentRepository(): AttachmentRepository
+    {
+        /** @var AttachmentRepository */
+        return $this->entityManager->getRepositoryByClass(Attachment::class);
+    }
+}