Spent the whole night trying to get a react native component to push a csv file to multer in the backend.

Tried using fetch, then dependencies, then xhr.
Realised I had to create formdata. No such documentation on the internet.

Used God knows what after 3 hours, suddenly things are working.

I'll never be able to get answers in life -_-

So I've been tackling the Multer package with express and react, Christ what a nightmare so far. I can't get anything to work.

- Images as array string in mongoDB check
- enctype on the form, check
- state for the field set to an array, check
- type file check
- express configuration based on the Multer docs check

Everything as far as I can tell is as it should be, yet nothing gets saved.

FFFFFF

Multer is shit.

Do you know how to validate file size + mime type of the file before saving it to the disk?

Here is an instruction:

1. In one place you provide a it a fileFilter function that will validate the mime type, but this function can not validate file size or send user response.
2. In second place provide it a config limits file, that will validate file size, but can not validate mime type
3. In third place you provide middleware to capture any errors caused by previous 2 places and send response back to the user.
4. Go google for what is cb in multer because their shit documentation says nothing about it

Such simple thing as request->validation->response is split into 3 different parts, each of different type: callback, config file and middleware.

Why do so much people use this shit written by a braindead retarded morons?