Вам не нужно использовать GridFsStorage. Попробуйте код ниже.
// file-controller.js
const express = require('express');
const mongoose = require('mongoose');
const multer = require('multer');
const router = express.Router();
const multerStorage = multer.memoryStorage();
const upload = multer({ storage: multerStorage, });
const imageSchema = mongoose.Schema({
image: { data: Buffer, contentType: String },
}, { timestamps: true });
const ImageModel = mongoose.model('images', imageSchema);
router.post('/upload', upload.single('image'), async (req, res, next) => {
const image = { data: new Buffer.from(req.file.buffer, 'base64'), contentType: req.file.mimetype }
const savedImage = await ImageModel.create(image);
res.send(savedImage);
});
router.get('/getImage/:id', async (req, res, next) => {
const { id: _id } = req.params;
// If you dont use lean(), you wont decode image as base64
const image = await ImageModel.findOne({ _id }).lean().exec();
res.send(image);
});
module.exports = router;
Подать маршрут через express.
const express = require('express');
const FileController = require('./file-controller');
const app = express();
// Mongo DB connection code ...
// Serve static files code ...
app.use('/file', FileController);
app.listen(3000, () => console.log(`Example app listening on port ${port}!`));