Initial commit

qr-api/src/upload.ts

@@ -0,0 +1,27 @@
+import multer from 'multer';
+import path from 'path';
+import { randomUUID } from 'crypto';
+import type { Env } from './env.js';
+
+const IMAGE_MIME = ['image/jpeg', 'image/png', 'image/gif', 'image/webp', 'image/svg+xml'];
+const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10 MB
+
+export function createMulter(env: Env) {
+    return multer({
+        storage: multer.diskStorage({
+            destination: (_req, _file, cb) => cb(null, env.UPLOADS_PATH),
+            filename: (_req, file, cb) => {
+                const ext = path.extname(file.originalname) || '.bin';
+                cb(null, `${randomUUID()}${ext}`);
+            },
+        }),
+        limits: { fileSize: MAX_FILE_SIZE },
+        fileFilter: (_req, file, cb) => {
+            if (IMAGE_MIME.includes(file.mimetype)) {
+                cb(null, true);
+            } else {
+                cb(new Error('Only image files (jpeg, png, gif, webp) are allowed'));
+            }
+        },
+    });
+}