I can upload files to mongodb using the standard Gridfs-stream implementation through a POST request. But, when I need to view the file metadata through GET request I'm getting error:
TypeError: Cannot read property 'files' of undefined
Apparently, it's not recognising my definition of gfs.This is my route handler:
router.get('/image/:filename', (req, res) => {
gfs.files.find({filename: req.params.filename}, function(err, file) {
let readStream = gfs.createReadStream({filename: file.filename});
let data = '';
readStream.on('data', (chunk) => {
data += chunk.toString('base64');
})
readStream.on("error", function (err) {
res.send("Image not found");
});
readStream.pipe(res);
})
res.json();
});
I have defined gridfs-stream in the simplest way:
const conn = mongoose.createConnection(URI, {useNewUrlParser:true, useUnifiedTopology:true});
let gfs;
Grid.mongo = mongoose.mongo;
conn.once('open', () => {
gfs = Grid(conn.db);
gfs.collection('uploads');
});
const storage = new GridFsStorage({
url: URI,
file: (req, file) => {...}
});
const upload = multer({ storage });
I can't understand what is the problem here, I'm stuck for days!
Try using this:
app.get("/file/:filename", async (req, res) => {
try {
const file = await gfs.files.findOne({ filename: req.params.filename });
const readStream = gfs.createReadStream(file.filename);
readStream.pipe(res);
} catch (error) {
res.send("not found");
}
});